WO2022022240A1 - 投影模组及其组装方法和包括投影模组的近眼显示设备 - Google Patents
投影模组及其组装方法和包括投影模组的近眼显示设备 Download PDFInfo
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- WO2022022240A1 WO2022022240A1 PCT/CN2021/104694 CN2021104694W WO2022022240A1 WO 2022022240 A1 WO2022022240 A1 WO 2022022240A1 CN 2021104694 W CN2021104694 W CN 2021104694W WO 2022022240 A1 WO2022022240 A1 WO 2022022240A1
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- projection
- module
- structural member
- rigid structural
- display
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
Definitions
- the invention belongs to the technical field of projection display, and in particular relates to a projection module, a method for assembling the projection module, and a near-eye display device including the projection module.
- Near-eye display devices have received more and more attention, and near-eye display devices can choose to use virtual reality (Virtual Reality, VR) technology and augmented reality (Augmented Reality, AR) technology to project imaging.
- VR Virtual Reality
- AR Augmented Reality
- VR can build a virtual scene based on the realization of the physical environment, bringing users a new experience.
- AR technology can use a waveguide sheet scheme (that is, using a light source, a projection lens and a waveguide sheet), or a traditional Birdbath scheme.
- the traditional Birdbath solution is difficult to be tolerated by consumers due to its large size, difficult to further improve the field of view, and relatively poor experience.
- Near-eye display devices have become smaller and more beautiful, and the user experience is also better. Therefore, near-eye display devices using the waveguide sheet scheme are increasingly accepted by users.
- Near-eye display devices using the waveguide sheet solution mainly include projection modules (eg, opto-mechanical) and waveguide sheets.
- the projection module projects the image into the waveguide sheet, and the image is dilated in two dimensions through the waveguide sheet, and then enters the human eye.
- a projection module which includes a projection display device and a projection lens, the projection display device includes a lighting assembly and a display module with a display chip; it also includes a rigid structural member, the The light converting element of the lighting assembly is fixedly mounted on the rigid structural member, and there is a gap between the display module and the rigid structural member.
- connection medium is provided in the gap, and the connection medium fixes the display module on the rigid structural member.
- a first window is opened on one side of the rigid structural member, the display module is fixed at the window corresponding to the first window, and the display module and the The light converting elements are respectively located on both sides of the first opening window.
- the gap is in the range of 0.05 mm or more and 1 mm or less, or further in the range of 0.1 mm or more and 0.6 mm or less.
- the gap is configured to determine the positioning of the display chip relative to the lighting assembly, so that the image projection image output by the projection lens meets a predetermined requirement under the determined positioning.
- the projection image complies with the predetermined requirement comprises: the imaging sharpness of the projection image complies with the corresponding predetermined requirement, the luminance uniformity of the projection image complies with the corresponding predetermined requirement, and the projection image
- the virtual image conforms to corresponding predetermined requirements; or further includes: the projected image can enter the human eye in a substantially horizontal or substantially vertical orientation.
- the display module is fixed on the rigid structural member by a cured connecting medium in the gap, so that the display chip is fixed on the projection mold based on the determined positioning in the group.
- the lighting assembly includes a light source module
- the light diverting element is used to at least partially turn the light emitted by the light source module to the display chip, and/or at least partially turn the light returned from the display chip to the projection of the projection module lens.
- the first fenestration is configured to enable the display module to be positioned and mounted at the fenestration corresponding to the first fenestration from the outside of the rigid structural member.
- the display module includes a substrate for attaching the display chip
- connection medium for fixing the display module on the rigid structural member is provided.
- the thickness of the connecting medium is in the range of 0.05 mm or more and 1 mm or less, or further in the range of 0.1 mm or more and 0.6 mm or less.
- the connecting medium is configured to seal the gap.
- the connecting medium has a thickness arrangement of non-uniform thickness such that the display module is positioned obliquely with respect to the rigid structure.
- the projection module further includes a support plate
- the support plate is provided with a drawing glue groove and a limit structure
- the drawing glue groove is provided with a connecting medium for fixing and installing the rigid structural member
- the limiting structure is set corresponding to the rigid structural member and used The rigid structure is limitedly mounted on the support plate.
- the outer wall of the rigid structural member is further provided with a second window facing the light source module and a third window facing the projection lens;
- the projection lens is positioned and installed on the third opening, so that the projection lens is positioned and installed relative to the projection display device.
- the projection lens may be positioned and mounted on the On the third window.
- a near-eye display device comprising: a waveguide sheet, any one of the projection modules described above, and a bracket;
- the waveguide sheet and the projection module are positioned and installed on the bracket so that the center of the light projected by the projection module falls at the center of the coupling region of the waveguide sheet.
- the support is provided with a receiving structure for at least partially receiving the waveguide sheet
- the waveguide sheet is positioned and installed on the bracket through the connection medium in the receiving structure, so that the projection module is projected onto the bracket.
- the center of the ray falls on the center of the coupling region of the waveguide sheet.
- connection medium is arranged on both sides corresponding to the glue area of the waveguide sheet and is located between the waveguide sheet and the inner wall of the receiving structure; or the connection medium is opposite to the waveguide.
- the glue area of the sheet is unilaterally arranged and located between the waveguide sheet and the inner wall of the receiving structure.
- the inner wall of the receiving structure is provided with protrusions for increasing the surface area of the connecting medium in contact with the inner wall.
- a glue overflow groove is provided on the inner wall of the receiving structure.
- the one-sided gap between the waveguide sheet and the inner wall of the receiving structure is in the range of greater than or equal to 0.25 mm and less than or equal to 1 mm.
- a plurality of glue injection holes are provided in the bracket corresponding to the receiving structure and the glue drawing area of the waveguide sheet.
- the projection module is located substantially on the out-coupling side of the waveguide sheet, or the projection module is located substantially on the opposite side of the out-coupling side of the waveguide sheet.
- the projection module is positioned and mounted on the bracket substantially vertically aligned with the coupling region of the waveguide sheet.
- the projection module is positioned and mounted on the bracket substantially parallel to the coupling-in region of the waveguide sheet, and is disposed between the projection module and the coupling-in region of the waveguide sheet There is a refracting prism, the refracting prism is positioned and installed relative to the bracket so that the center of the light projected by the projection module falls at the center of the coupling-in area of the waveguide sheet after being refracted by the prism.
- the bracket is provided with an escape opening for avoiding the light projected by the projection module at a position corresponding to the coupling-in area of the waveguide sheet.
- the support includes a main support and a sub support, wherein the main support and the sub support are removably fixedly connected together and form a receiving structure for at least partially receiving the waveguide sheet,
- the waveguide sheet is positioned and installed in the receiving structure between the main support and the auxiliary support, and the projection module is positioned and installed on the left and right sides of the main support.
- the sub-support is fixedly disposed relative to the main support in a positioning manner that avoids the coupling-in area of the waveguide sheet.
- marking points are provided on the support, which are used to directly position and install the waveguide sheet relative to the support through machine vision technology.
- a method for assembling a projection module comprising the steps of:
- the positioning of the display module relative to the lighting assembly is adjusted until the projected image output by the projection lens of the projection module meets the predetermined requirements, and accordingly, the initial gap is adjusted Determined as the adjusted gap;
- the display module is fixed relative to the lighting assembly in the adjusted position.
- the positioning of the display chip relative to the assembled lighting assembly is calibrated in an active manner, or the display chip is adjusted relative to the assembled lighting assembly using machine vision technology. Positioning of assembled lighting assemblies.
- the projection image complies with the predetermined requirement comprises: the imaging sharpness of the projection image complies with the corresponding predetermined requirement, the luminance uniformity of the projection image complies with the corresponding predetermined requirement, and the projection image The virtual image distance meets the corresponding predetermined requirements; or further includes: the projected image can enter the human eye in a substantially horizontal or substantially vertical orientation.
- the step of assembling the lighting assembly of the projection module includes:
- the first rigid structure member and the second rigid structure member are fixedly mounted on the support plate.
- the step of assembling the lighting assembly of the projection module further includes:
- first rigid structure member and the second rigid structure member are fixedly mounted on the support plate, the first rigid structure member and the second rigid structure member are positioned and connected to each other by means of snap connection.
- the preset position is located outside the rigid structural member on which the light converting element is fixedly mounted;
- the positioning of the display module with the display chip relative to the rigid structural member is adjusted from the outside of the rigid structural member, so as to adjust the position of the display chip relative to the lighting assembly. position.
- the tuning includes one or more of the following:
- the display module is translated relative to the rigid structural member in an xoy plane, until the brightness uniformity of the projected image meets the corresponding predetermined requirements, wherein the xoy plane is based on perpendicular to the light diverting element from the lighting assembly the direction of the light directed towards the display chip;
- the display module is rotated relative to the rigid structure on the xoy plane until the projected image can enter the human eye in a substantially horizontal or substantially vertical orientation.
- the substrate to which the display chip is attached is fixed relative to the rigid structural member of the lighting assembly on which the light converting element is fixedly mounted through a connecting medium.
- the adjustment step by adjusting the positioning of the display chip relative to the assembled lighting assembly, the adjustment and determination of the distance between the display module and the rigid structural member is performed. An initial gap is obtained to obtain the adjusted gap; wherein the connecting medium is placed in the adjusted gap.
- a method for assembling a projection module comprising the steps of:
- the projection lens is fixed relative to the projection display device under the adjusted position.
- the positioning of the projection lens relative to the assembled projection display device is calibrated in an active manner, or the relative position of the projection lens is adjusted using machine vision technology Positioning of the assembled projection display device.
- the projection image complies with the predetermined requirement comprises: the imaging sharpness of the projection image complies with the corresponding predetermined requirement, the luminance uniformity of the projection image complies with the corresponding predetermined requirement, and the projection image The virtual image meets the corresponding predetermined requirements.
- the step of assembling the projection display device of the projection module includes:
- the display chip is fixedly mounted on the first rigid structure.
- the step of assembling the projection display device of the projection module further includes:
- the rigid structural member and the second rigid structural member are fixedly mounted on the support plate, the rigid structural member and the second rigid structural member are positioned and connected to each other by means of snap connection.
- the preset position is located outside the rigid structural member on which the light converting element is fixedly mounted;
- the positioning of the projection lens relative to the rigid structural member is adjusted from the outside of the rigid structural member, so as to adjust the positioning of the projection lens relative to the projection display device.
- the tuning includes one or more of the following:
- the projection lens is fixed relative to the rigid structural member of the lighting assembly on which the light converting element is fixedly mounted by means of a connecting medium.
- the projection lens and the rigid structural member fixedly installed with the light conversion element are determined.
- a method for assembling a near-eye display device comprising the steps of:
- the waveguide sheet is fixed relative to the bracket under the adjusted position.
- FIG. 1 is a schematic diagram of a basic structure of a projection module according to an embodiment of the present invention, which shows a receiving camera used in the adjustment process of the projection module.
- FIG. 2 is a schematic diagram showing the basic structure of the projection module of the embodiment of FIG. 1 from another perspective.
- FIG. 3 is a schematic structural diagram of the first rigid structure of the projection module of the embodiment shown in FIG. 1 , the light converting element and the projection lens fixedly mounted thereon.
- FIG. 4 is a schematic structural diagram of the first rigid structure of the projection module of the embodiment shown in FIG. 1 , the light converting element, the projection lens and the display module fixedly mounted thereon.
- FIG. 5 is a schematic diagram of an optical path principle of the projection module of the embodiment shown in FIG. 1 .
- FIG. 6 is a schematic diagram of another optical path principle of the projection module of the embodiment shown in FIG. 1 .
- FIG. 7 is a schematic diagram of a light path principle of a projection module according to another embodiment of the present invention.
- FIG. 8 is a flowchart of a method for assembling a projection module according to an embodiment of the present invention.
- FIG. 9 is a flowchart of a method for assembling a projection module according to another embodiment of the present invention.
- FIG. 10 is a schematic structural diagram of a near-eye display device according to the first embodiment of the present invention.
- FIG. 11 is a schematic structural diagram of the near-eye display device of the embodiment shown in FIG. 10 from another perspective.
- FIG. 12 is a top view of the near-eye display device of the embodiment shown in FIG. 10 , wherein an enlarged view of a partial area A of the receiving structure is also shown.
- FIG. 13 is a schematic structural diagram of a waveguide sheet used in the near-eye display device according to the first embodiment of the present invention, wherein FIG. 13( a ) and FIG. 13( b ) respectively show the waveguide sheet from different perspectives.
- FIG. 14 is a schematic structural diagram of a near-eye display device according to a second embodiment of the present invention.
- FIG. 15 is a schematic structural diagram of the near-eye display device of the embodiment shown in FIG. 14 from another perspective.
- FIG. 16 is a top view of the near-eye display device of the embodiment shown in FIG. 14 , wherein an enlarged view of a partial area B of the receiving structure is also shown.
- FIG. 17 is a schematic diagram of positioning and installing the projection module of the near-eye display device of the embodiment shown in FIG. 14 .
- FIG. 18 is a schematic structural diagram of a waveguide sheet used in a near-eye display device according to a second embodiment of the present invention, wherein FIG. 18( a ) and FIG. 18( b ) respectively show the waveguide sheet from different perspectives.
- 19 to 21 are schematic structural diagrams of a near-eye display device according to a third embodiment of the present invention.
- FIG. 22 is a schematic structural diagram of a near-eye display device according to a fourth embodiment of the present invention.
- FIG. 23 is a flowchart of a method of assembling a near-eye display device according to an embodiment of the present invention.
- orientation terms of "upper”, “lower”, “left”, “right”, “front” and “rear” are relative to the orientation of the projection module/near-eye display device in the accompanying drawings after installation and use or relative It is defined by the orientation shown in the drawings, and it should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, which may vary according to the orientation in which the opening and closing device is placed. change accordingly.
- a projection module usually includes a display device and a projection lens, and the relative positions of the display device and the projection lens directly determine the quality of the projected image. Tolerance, so that the image projected by the projection module will appear distorted when it reaches the human eye.
- assembly tolerances inevitably exist in the assembly process of multiple components of the display device (such as light source modules, display chips, and optical elements for light splitting and light combining), which easily lead to distortion of the projected image of the projection module.
- the x-direction, the y-direction and the z-direction are defined based on the orientation of the projection module, wherein the x-direction corresponds to the direction of the light emitted from the light-changing element to the projection lens.
- the z-direction corresponds to the direction of light emitted from the light converting element to the display chip, and the y-direction is substantially perpendicular to the xoz plane.
- the projection module 10 according to an embodiment of the present invention is described below with reference to FIGS. 1 to 4 .
- the projection module 10 of the following example can be actively adjusted and then assembled before being installed on a near-eye display device (eg, the near-eye display device 200 in FIG. 8 ), so as to overcome the problems caused by the projection module 10 , for example, generated during the assembly process. Assembly tolerances, etc., make the projected image output by the projection module 10 (which can be projected onto the waveguide sheet) have good image quality (eg, less distortion).
- the projection module 10 includes a projection display device 11 and a projection lens 13 .
- the projection display device 11 may include an illumination assembly 111 and a display module 113 with a display chip 1130 .
- the projection module 10 or the lighting assembly 111 may further include a first rigid structural member 121 .
- FIGS. 1 to 4 illustrate the display module 113 separated from the first rigid structural member 121. It will be understood that after the projection module 10 is assembled, the display module 113 is positioned and fixed on the first rigid structure 121. on the rigid structural member 121 .
- the lighting assembly 111 may include a light source module 1110 and at least one light converting element 1112, and the light converting element 1112 may at least partially redirect the light emitted by the light source module 1110 to the display chip 1130 (see FIG. 5 , the S light of the light emitted by the light source module 1110). is deflected and reflected to the LCOS chip), or the light returned by the display chip 1130 can be deflected at least partially to the projection lens 13 (see FIG.
- the S light used to form the projected image is deflected and reflected to the projection lens 13) , therefore, the light converting element 1112 can have the function of light splitting, which can be specifically, but not limited to, the PBS (Polarization Beam Splitter, polarization beam splitter) prism exemplified in FIGS. 5 and 6 , which can also be, for example, as shown in FIG. 7 . out TIR (Total Internal Reflection) prism.
- PBS Polarization Beam Splitter, polarization beam splitter
- TIR Total Internal Reflection
- the light source module 1110 may include a light source, etc., and a light homogenizing element (such as a collimating mirror) may also be provided corresponding to the light source, and the light emitted by the light source enters the light converting element 1112 after passing through the light homogenizing element; further, the light source may also be set to two One or three (for example, red light source, blue light source, color filter light source), three corresponding light source devices can be arranged in one structural member, and then combined by color combination optical elements to form RGB light source. It will be appreciated that the specific arrangement of the light source module 1110 is not limiting.
- the display chip 1130 of the display module 113 may be a passive light emitting display, for example, it may specifically be an LCOS (Liquid Crystal on Silicon) chip (as shown in FIGS. 5 and 6 ) or a DLP (Digital Light Processing, digital optical processing) chip (as shown in FIG. 7 ), etc., the display module 113 further includes a substrate 1131 for mounting the display chip 1130 , wherein the display chip 1130 can be pre-mounted on the inner side of the substrate 1131 . During the assembly process, the display chip 1130 and the substrate 1131 The positioning relative to eg the first rigid structure 121 can be adjusted together.
- LCOS Liquid Crystal on Silicon
- DLP Digital Light Processing, digital optical processing
- the projection module 10 or the lighting assembly 111 further includes a second rigid structural member 122 , and a support plate 123 is provided corresponding to the first rigid structural member 121 .
- the two rigid structural members 122 and the support plate 123 are used for positioning and installing each optical element of the lighting assembly 111 so that the light path of the lighting assembly 111 is fixed after the lighting assembly 111 is assembled.
- the first rigid structural member 121 and the second rigid structural member 122 may be fixedly mounted on the support plate 123; the first rigid structural member 121 may be substantially configured as a hexahedron, and the inner cavity of the first rigid structural member 121 may accommodate at least And fixed with the light converting element 1112 (see FIG. 3 and FIG. 4 ).
- the first rigid structure 121 may also be used to position and install the display module 113 and/or the projection lens 13 ;
- the second rigid structure 122 may be substantially configured as a hexahedron, and the inner cavity of the second rigid structure 122
- the light source module 1110 can be accommodated and fixed, for example, the light source, collimating mirror, etc. of the light source module 1110 are fixedly installed in the inner cavity of the second rigid structural member 122 .
- first rigid structural member 121 and the second rigid structural member 122 are separated from each other before assembly, and they are positioned and installed with each other; in other embodiments, the first rigid structural member 121 and the second rigid structural member 122 may also be set in one piece.
- FIG. 5 shows a schematic diagram of an optical path principle of the projection module of the embodiment of FIG. 1 .
- the LCOS chip represents the display chip 1130, which can modulate the light source to form an image
- the PBS prism represents the light converting element 1112
- the light source and the collimator mirror represent the light source module 1110; in this embodiment, the LCOS chip, the PBS prism and the projection lens 13 to form a straight optical path, which can be formed by fixing their positions during assembly so that they are arranged in a substantially straight line.
- the light emitted by the light source enters the PBS prism through the collimator lens, and the S light of the light can be refracted and reflected to the LCOS chip through the PBS prism, and the LCOS chip will proportionally controllable the S light received by its different pixels Converted to P light for forming a projected image, the P light passes straight through the PBS prism and is directed toward the projection lens 13 . Therefore, the projection lens 13 can form, for example, a color projection image to be projected out.
- FIG. 6 shows a schematic diagram of another optical path principle of the projection module in the embodiment of FIG. 1 .
- the LCOS chip represents the display chip 1130, which can modulate the light source to form an image
- the PBS prism represents the light converting element 1112
- the light source and the collimating mirror represent the light source module 1110, and it is also shown that the light source module 1110 is not specifically shown in FIG. 1.
- the LCOS chip, the PBS prism, and the projection lens 13 form a straight optical path, and the described can be formed by fixing their positions during assembly so that they are arranged in a substantially straight line. straight light path.
- the light emitted by the light source enters the PBS prism through the collimating mirror, and the S light of the light is substantially completely reflected by the PBS prism to the wave plate (which is not shown) and the total reflection mirror, and the wave plate will
- the S light is converted into P light, and then the P light is reflected by the total reflection mirror to the PBS prism, and the P light passes through the PBS prism and is projected to the LCOS chip, which
- the S light of the projected image and the S light used to form the projected image are deflected and reflected to the projection lens 13 by the PBS prism. Therefore, the projection lens 13 can form, for example, a color projection image to be projected out.
- the optical path of the projection module 10 is complex and there are many internal components. Apart from the precision errors in the manufacture of various components themselves, errors will inevitably occur in the assembly process of many components. More importantly, the display chip 113 modulates the incident light to form an image, so its assembly accuracy is easily directly related to the quality of the projection pattern, and the display chip 113 itself has high requirements for the angle of the incident light, which needs to be within a certain range, otherwise it will cause Projected images are prone to negative effects (such as aberrations or chromatic aberrations, etc.).
- a gap (not shown in the figure) between the display module 113 and the first rigid structural member 121 , and the gap reflects the relative relationship between the display chip 1130 and the lighting assembly.
- a connection medium eg, cured colloid
- the gap is movable to allow adjustment of the positioning of the display module 113 relative to the first rigid structure 121, and after setting the connecting medium (eg, after the glue is cured), the The gap is determined and fixed, and the positioning of the display module 113 relative to the first rigid structural member 121 is fixed, that is, the positioning of the display chip 1130 relative to the lighting assembly 111 is fixed.
- this gap will allow the positioning of the display module 113/display chip 1130 to be actively adjusted after the lighting assembly 111 has been substantially assembled, until the adjustment is made until the projected image output by the projection lens 13 meets the predetermined requirements; and , the gap reflecting the better positioning of the display module 113 is easily fixed by a connecting medium such as colloid, so that the adjusted positioning of the display module 113/display chip 1130 is always reflected in the projection module 10 and used. Therefore, the projection module 10 with this gap can easily overcome the unavoidable internal tolerances inside the lighting assembly 111 to realize that the optical axes between the projection lens 13 and the display chip 1130 are basically consistent, and even realize the projection lens 13 and the light converting element. 1112. The optical axes between the display chips 1130 are basically the same.
- the gap between the display module 113 and the first rigid structural member 121 can be determined and fixed by, for example, the following method (ie, the first method): actively adjusting the overall positioning of the display module 113 relative to the first rigid structural member 121, and then using, for example, a glue
- the display module 113 is fixedly mounted on the first rigid structural member 121 .
- a gap (not shown in the figure) between the projection lens 13 and the first rigid structural member 121, and the gap reflects the positioning of the projection lens 13 relative to the projection display device 11; in the assembled projection module 10 Among them, a connection medium (eg, cured colloid) is provided in the gap, and the connection medium fixes the projection lens 13 on the first rigid structural member 121 .
- a connection medium eg, cured colloid
- the gap is movable to allow adjustment of the positioning of the projection lens 13 relative to the first rigid structure 121, and after setting the connection medium (eg, after the glue is cured), The gap is determined and fixed, and the positioning of the projection lens 13 relative to the first rigid structural member 121 is fixed, that is, the positioning of the projection lens 13 relative to the assembled projection display device 11 is fixed.
- this gap will allow the positioning of the projection lens 13 to be actively adjusted after the projection display device 11 has been basically assembled, until the adjustment is made until the projected image output by the projection lens 13 meets the predetermined requirements; and, the reflection display
- the better positioning gap of the module 113 is easily fixed by a connecting medium such as colloid, so that the adjusted positioning of the projection lens 13 is always reflected in the projection module 10 and used.
- the projection module 10 with this gap can easily overcome the unavoidable internal tolerance (including the installation tolerance of the display module 113 ) inside the projection display device 11 to realize that the optical axes between the projection lens 13 and the display chip 1130 are basically consistent, It is even achieved that the optical axes between the projection lens 13 , the light converting element 1112 and the display chip 1130 are basically the same.
- the gap between the projection module 10 and the first rigid structural member 121 can be determined and fixed by, for example, the following method (ie, the second method): actively adjusting the overall positioning of the projection lens 13 relative to the first rigid structural member 121 and then by, for example, The colloid fixes the projection lens 13 on the first rigid structural member 121 .
- the optical axis consistency between the projection lens 13 and the display chip 1130 is good, it will be beneficial to form a high-quality projection image, for example, to form a projection image that meets predetermined requirements.
- the receiving camera 91 as shown in FIG. 1 can be used to help determine the positioning; the receiving camera 91 can be fixedly arranged at the light output position of the projection module 10 to receive Projection image: With the received projection image, the relative position of the display chip 113 and the lighting assembly 111 can be adjusted in real time (when the display chip 113 is fixedly installed), or the relative position of the projection lens 13 and the projection display device 11 can be adjusted in real time.
- the predetermined requirements for the projected image can be determined in advance, for example, in a projection module with good assembly accuracy and good optical axis consistency between the projection lens 13 and the display chip 1130; the predetermined requirements are determined in advance in the projection lens 13 When the output projection image (the quality of which can be determined and acquired by the receiving camera 91 ) meets the predetermined requirements, the optical axis between the projection lens 13 and the display chip 1130 is determined to be substantially consistent.
- the projected image meets the predetermined requirements includes: the imaging clarity of the projected image meets the corresponding predetermined requirements, the brightness uniformity of the projected image meets the corresponding predetermined requirements, and the virtual image distance of the projected image meets the corresponding predetermined requirements; or further includes:
- the projected image can enter the human eye in a substantially horizontal or substantially vertical orientation (in the case where, for example, the display module 113 can be rotated relative to the first rigid structure 121 in the xoy plane).
- the first rigid structural member 121 may have a hexahedral structure as a whole, wherein at least three sides have windows, and the side facing the light source module 1110 is opened with a second window 126 (ie, the light incident window). ), the side facing the projection lens 13 is provided with a third window 127 (ie, a light exit window, which outputs the outgoing light to the projection lens), and the side facing the display module 113 is provided with a first window 124 ( display window). Both the light incident window and the light exit window are arranged along the x-direction, and the display window may open toward the z-direction.
- the outer side of the first opening 124 may be provided with a step 1212 (see FIG. 4 ).
- the step 1212 is used to support and position the display module 113. After the display module 113 is actively adjusted, its relative position to the lighting assembly 111 can be determined ( The gap between the display module 113 and the first rigid structural member 121 is determined), and can be fixed at the opening of the first opening 124 of the first rigid structural member 121 by glue, wherein the glue is arranged on the step 1212, The glue firmly connects the steps of the first rigid structure 121 and the substrate 1131 of the display module 113 , so that the gap between the display module 113 and the first rigid structure 121 described above can be formed.
- the display module 113 and the light converting element 1112 are respectively located on the upper and lower sides of the first window 124, for example.
- the substrate 1131 may be, but not limited to, a ceramic or metal substrate, which has relatively high strength and heat dissipation performance.
- the display module 113 can be fixed on an external adjustment mechanism by clamping or suction, and the ceramic or metal substrate with greater strength can make it clamped by the adjustment mechanism. Or it is not easy to deform when sucking.
- the substrate 1131 further includes a layer of circuit board, and the display chip 1130 (eg, an LCOS chip) is electrically connected to the circuit board.
- the fixed gap between the display module 113 and the first rigid structural member 121 is in the range of 0.05 mm or more and 1 mm or less; or, when the optical axes of the optical components of the lighting assembly 111 are highly consistent, The fixed gap between the display module 113 and the first rigid structural member 121 is in the range of greater than or equal to 0.1 mm and less than or equal to 0.6 mm.
- the thickness of the connecting medium (eg, colloid) disposed on the step 1212 is in the range of 0.05 mm or more and 1 mm or less, or, further, the optical axis consistency of each optical component in the lighting assembly 111 is relatively high
- the thickness of the connection medium (eg, colloid) provided on the step 1212 is in the range of greater than or equal to 0.1 mm and less than or equal to 0.6 mm.
- connection medium e.g, glue
- the connection medium e.g, glue
- the fixed gap between the display module 113 and the first rigid structure 121 may be arranged unequally within the above range to ensure that the display module 113 is relatively opposite to the first rigid structure 121 of various oblique positioning.
- the shape of the colloid between the substrate 1131 and the first rigid structural member 121 is configured to be able to seal all the gaps between the substrate 1131 and the first opening 124; for example, the colloid can be arranged in a ring shape , so that the inner space of the first rigid structural member 121 can be sealed. In this way, unwanted stray light and dust can be prevented from entering the inside of the first rigid structural member 121 .
- the projection lens 13 can be fixed on the third opening 127 through a connecting medium such as colloid before the display module 113 , and the display module 113 can be positioned and installed on the first opening from the outside of the first rigid structure 121 .
- the window 124 for example, on the step 1212 exposed on the outer path of the first rigid structural member 121 ), so as to achieve precise positioning and installation of the display chip 1130 relative to the lighting assembly 111 .
- the miniature projection module 10 not only the display chip 1130 and other optical components are small in size, but their installation space is also small, so it is generally difficult to perform internal adjustment to achieve high optical axis consistency; the above embodiments
- the projection module 10 can fix the display module 113 on the outside of the first rigid structural member 121 and the light converting element 1112 on the inside of the first rigid structural member 121 . Carrying out active adjustment is beneficial to facilitate adjustment and obtain accurate positioning results or gaps, and it is also convenient to perform fixed installation after the positioning is adjusted (for example, to fix the gap between the display module 113 and the first rigid structural member 121 ); Therefore, it is beneficial to obtain better optical axis consistency and improve the quality of the projected image.
- the side of the second rigid structural member 122 facing the light converting element 1112 is also provided with a window for the incident light emitted by the light source.
- the first rigid structure 121 and the second rigid structure 122 can be positioned and connected to each other. The installation accuracy of a rigid structural member 121 improves the optical axis consistency of the light source, collimating mirror, PBS prism and other optical elements at the same time.
- the second rigid structural member 122 and/or the first rigid structural member 121 may be provided with chamfers or steps in the contact area of the two structural members to form the glue-painting area 233, and the glue in the glue-painting area 233 may
- the second rigid structure 122 and the first rigid structure 121 are connected to each other before they are mounted on the support plate 123 .
- the first rigid structural member 121 and the second rigid structural member 122 may also be connected together by a snap connection.
- two side walls of the second rigid structural member 122 are provided with a pair of protruding portions 124a, and the protruding portions 124a are disposed protruding toward the first rigid structural member 121 along the x-direction.
- a pair of concave parts 124b are provided on the side walls, and the concave parts 124b are concave inwards to receive the protruding parts 124a; by configuring the shapes of the protruding parts 124a and the concave parts 124b, they can be formed into a snap-fit structure 124; the second rigid structure 122 and the
- the first rigid structural member 121 is positioned and connected through the clip structure 124 , so as to improve the positioning accuracy and connection strength between the second rigid structural member 122 and the first rigid structural member 121 . It will be understood that, after the second rigid structure member 122 and the first rigid structure member 121 are snapped together, they may be further fixedly connected by, for example,
- the support plate 123 mainly serves the functions of fixation and reinforcement.
- the second rigid structure member 122 and the first rigid structure member 121 may be fixedly connected to each other during the process of installing the second rigid structure member 122 and the first rigid structure member 121 to the support plate 123, and the support plate 123 may also function as a positioning connection.
- the support plate 123 is provided with a drawing glue groove 1231 and a limiting structure 1232;
- the drawing glue groove 1231 can be a through structure, and a connecting medium such as colloid can be set in the drawing glue groove 1231.
- the colloid can be used to fixedly install the second rigid structural member 122 and/or the first rigid structural member 121;
- the limiting structure 1232 is mainly provided corresponding to the first rigid structural member 121, and is used to limit and install the first rigid structural member 121 on the on the support plate 123 .
- the limiting structure 1232 may specifically include one or more pairs of limiting holes, and correspondingly, corresponding limiting structures including one or more pairs of limiting posts 1212 may be correspondingly disposed at the bottom of the first rigid structural member 121 .
- the limiting structure 1232 may also be provided corresponding to the second rigid structural member 122 (for example, a corresponding limiting column may also be provided on the second rigid structural member 122 ).
- the lighting assembly 111 (including the first rigid structural member 121 and the second rigid structural member 122 ) is integrally positioned and mounted on the support plate 123 in a limited manner through the limiting structure of the above embodiment.
- the display chip 1130 described in the above example can be positioned and installed relative to the lighting assembly 111, or the projection lens 13 can be positioned and installed relative to the projection display device 11.
- the first rigid structural member 121 and the second rigid structural member 122 can be integrally installed on the support plate. 123 and after, so that by actively adjusting the positioning of the display chip 1130 relative to, for example, the first rigid structural member 121/actively adjusting the positioning of the projection lens 13 relative to, for example, the first rigid structural member 121, the lighting assembly 111 that has been basically assembled /
- the installation error of various components inside the display device 11 will be considered in the active adjustment process, and the problem of poor optical axis consistency between the projection lens 13 and the display chip 1130 caused by the error can be effectively overcome.
- FIG. 7 is a schematic diagram showing the principle of an optical path of a projection module according to another embodiment of the present invention.
- the display chip 1130 may be a DMD chip, and the light converting element 1112 is correspondingly configured as a TIR prism.
- the following describes a specific assembling method of the projection module 10 according to an embodiment of the present invention with reference to FIG. 8 .
- step S801 the lighting assembly 111 of the projection module 10 is assembled, especially, the light converting element 1112 of the lighting assembly 111 is fixedly installed on the rigid structural member 121 .
- the optical devices and the like of the lighting assembly 111 may be assembled using the first rigid structural member 121, the second rigid structural member 122, and the like.
- First provide the various components required for assembly, such as the first rigid structure 121, the second rigid structure 122, the support plate 123, the light source, the collimating mirror, the light converting element 1112, etc.; further, paste the light source and the collimating mirror Attached to the inner cavity of the second rigid structure 122, and the light converting element 1112 is attached to the inner cavity of the first rigid structure 121; optionally, the projection lens 13 can also be attached to the first rigid structure 121 , wherein, the projection lens 13 can be set at the light exit position of the light converting element 1112 , for example, at the opening of the third opening 127 positioned and installed on the first rigid structural member 121 . Then, the second rigid structural member 122 and the first rigid structural member 121 can be positioned and connected to each other in a snap-fit manner through the snap-fit structure 124
- step S801 the first rigid structural member 121 and the second rigid structural member 122 that are fixedly connected together can be further positioned and installed on the support plate 123 as a whole.
- the rigid structural member 121 and the second rigid structural member 122 are integrally positioned and mounted on the support plate 123 .
- step S801 two separate structural members (ie, the first rigid structural member 121 and the second rigid structural member 122) are used, and the light source module 1110 and the light converting element 1112 can be respectively arranged in two separate structural members. Therefore, the corresponding parts of the lighting assembly 111 can be accurately attached to the corresponding structural members using machine vision technology, which is beneficial to improve the assembly accuracy of the lighting assembly 111, and also improves the relationship between the various optical elements inside the lighting assembly 111. optical axis consistency.
- step S802 the display module 113 with the display chip 1130 is set at a preset position of the projection module 10 , so that an initial gap is left between the display module 113 and the rigid structural member 121 .
- the preset position can realize the rough positioning of the display module 113 relative to the first rigid structural member 121, and the preset position does not take into account the assembly tolerance generated in step S801, for example, when the display module 113 is placed in the preset position , the projection image generated by the projection module 10 is easily distorted, for example.
- the preset position can be located outside the first rigid structural member 121; for multiple projection modules 10, the preset position of the display module 113 can be uniformly determined relative to the first rigid structural member 121; external equipment can be used to control the The components of the external device to which the display module 113 is adsorbed are moved to place the display module 113 in the preset position.
- step S803 on the basis of the preset position, the positioning of the display module 113 relative to the basically assembled lighting assembly 111 is adjusted until the projected image output by the projection lens 13 of the projection module 10 meets the predetermined requirements, so Accordingly, the initial gap is adjusted and determined to be the adjusted gap.
- the display chip 1130 is pre-fixed on the substrate 1131, so the positioning of the display chip 1130 can be adjusted through the adjustment of the positioning of the display module 113 relative to the lighting assembly 111 (eg, the first rigid structure 121). to realise.
- the corresponding assembly system can be used to continuously debug the positioning of the display module 113 relative to the lighting assembly 111 (eg, the first rigid structural member 121) until the projection image received by the receiving camera 91 meets the predetermined requirements.
- the assembly system may include a six-axis platform, and the display module 113 is fixed to the six-axis platform by clamping jaws or suction nozzles.
- the orientation of 1112 is convenient for automatic adjustment.
- the projection module 10 is powered on to project a specific pattern, and the relative positional relationship between the display module 113 and the lighting assembly 111 is adjusted in real time according to the image information received by the receiving camera 91.
- the adjustment direction may include six-axis adjustment ( For example, the translation in the x/y/z direction, the rotation around the z/y/z direction, the plane perpendicular to the central ray of the display chip 1130 is defined as the xoy plane), until the image received by the receiving camera 91 conforms to the predetermined According to the standard, the relative position between the display module 113 and the lighting assembly 111 at this time is determined.
- the image aberration calculated by the computer can be used to obtain the direction, scale, angle, etc. that need to be adjusted for the display chip 1130;
- the resolution data of the series of images can obtain parameters such as the relative inclination angle, translation amount and distance between the display chip 1130 and the light converting element 1112 (or the projection lens 13 ); and then the six-axis platform can adjust the display chip 1130 and the light converting element based on these parameters.
- the positioning adjustment of the display module 113 may include the following actions:
- the displayed module 113 is translated relative to the first rigid structural member 121 in the xoy plane until the brightness uniformity of the projected image meets the corresponding predetermined requirements, wherein the xoy plane is based on a direction perpendicular to the light passing from the light diverting element 1112 of the lighting assembly 111. the direction of the light toward the display chip 1130 (as shown in FIG. 1 );
- the display module 113 is rotated relative to the first rigid structure 121 in the xoy plane until the projected image can enter, for example, the human eye or the receiving camera 91 in a substantially horizontal or substantially vertical orientation.
- adjusting the positioning of the display module 113/display chip 1130 relative to the first rigid structural member 121 also means adjusting the relative positioning of the display module 113/display chip 1130 relative to the first rigid structural member 121. Positioning of the light converting element 1112.
- the positioning of the display module 113 with the display chip 1130 relative to the first rigid structural member 121 can be adjusted from the outside of the first rigid structural member 121 by means of, for example, a six-axis platform, which is beneficial to facilitate adjustment and obtain accurate
- the positioning result is also convenient for fixed installation after the positioning is adjusted; thus, it is beneficial to obtain better optical axis consistency and improve the quality of the projected image.
- step S803 the positioning of the display chip 1130 relative to the substantially assembled lighting assembly 111 may be calibrated in an active manner, or the position of the display chip 1130 relative to the substantially assembled lighting assembly 111 may be adjusted using machine vision technology.
- the display module 113 is further accurately positioned relative to the first rigid structural member 121 , that is, the display chip 1130 is further accurately positioned relative to the light converting element 1112 , the projection lens 13 , etc. fixed on the first rigid structural member 121 . , which overcomes the problems caused by the assembly error of the lighting assembly 111 and the tolerance of the component itself, so that the optical axis consistency among the display chip 1130 , the light converting element 1112 , and the projection lens 13 is good.
- step S804 the display module 113 is fixed relative to the lighting assembly 111 under the adjusted positioning.
- the adjusted positioning in step S803 can be determined or recorded, and the adjusted positioning can specifically represent that, under this positioning condition, the imaging clarity of the projected image meets the corresponding predetermined requirements, and the brightness uniformity of the projected image The corresponding predetermined requirements are met, the virtual image distance of the projected image meets the corresponding predetermined requirements, and the projected image can enter the human eye in a substantially horizontal or substantially vertical orientation. Under the adjusted positioning, the adjusted gap between the display module 113 and the first rigid structural member 121 is determined.
- the substrate 1131 to which the display chip 1130 is attached can be fixed relative to the first rigid structural member 121 through a connecting medium such as glue, and the glue is placed in the gap between the display module 113 and the first rigid structural member 121
- glue is applied and cured on step 1212 , sealing first fenestration 124 .
- the assembly method of the above embodiment can form the projection module 10 of an embodiment of the present invention after the assembly is completed.
- the assembly error or the lighting assembly element generated in the assembly process of step S801 can be overcome. Due to its own tolerance, the optical axes between the display chip 1130, the light converting element 1112 and the projection lens 13 are basically consistent, which greatly improves the quality of the projected image.
- the following describes a specific assembling method of the projection module 10 according to another embodiment of the present invention with reference to FIG. 9 .
- step S901 the projection display device 11 of the projection module 10 is assembled.
- this step S901 is similar to the step S801 of the embodiment shown in FIG. 8 ; however, relative to the step S801, the step S901 also fixedly installs the display module 113 on the first rigidity based on, for example, the preset position of the step S802. At the opening of the first opening 124 of the structural member 121, it is difficult to achieve the precise positioning in the above step S803 by such fixed installation.
- step S901 includes: fixing the light converting element 1112 and the light source module 1110 of the lighting assembly 111 inside the first rigid structural member 121 and the second rigid structural member 122, respectively;
- the rigid structural members 122 are positioned and connected to each other by snap connection; the first rigid structural member 121 and the second rigid structural member 122 are fixedly installed on the support plate 123 ; the display chip 1130 is fixedly installed on the first rigid structural member 121 .
- Step S902 setting the projection lens 13 of the projection module 10 at a preset position of the projection module 10 .
- the preset position can realize the rough positioning of the projection module 10 relative to the first rigid structural member 121, the preset position does not take into account the assembly tolerance generated in step S901, for example, the projection lens 13 is placed in the preset position At this time, the projection image generated by the projection module 10 is easily distorted, for example.
- Step S903 adjust the positioning of the projection lens 13 of the projection module 10 relative to the basically assembled projection display device 11 until the projected image output by the projection lens 13 of the projection module 10 meets the predetermined requirements.
- step S903 can be respectively similar to the adjustment principle and assembly system for the display module 113 in step S803 of the embodiment shown in FIG. 8 , except for the position of the adjustment process.
- the movable element is transformed into the projection lens 13 by the display module 113 .
- the positioning adjustment of the projection lens 13 may include the following actions:
- the projection lens 13 is translated relative to the first rigid structure member 121 along the z direction until the virtual image distance of the projected image meets the corresponding predetermined requirement.
- the optical axis between the projection lens 13 and the display chip 1130 is determined to be substantially consistent; the projected image meeting the predetermined requirements includes: the projected image The imaging clarity of the projection image meets the corresponding predetermined requirements, the brightness uniformity of the projected image meets the corresponding predetermined requirements, and the virtual image distance of the projected image meets the corresponding predetermined requirements.
- adjusting the positioning of the projection lens 13 relative to the first rigid structure 121 also means adjusting the projection lens 13 relative to the light converting element 1112 and display the positioning of the chip 1130.
- Step S904 the projection lens 13 is fixedly installed relative to the projection display device 11 that has been basically assembled under the adjusted positioning.
- the adjusted positioning in step S903 can be determined or recorded, and the adjusted positioning can specifically represent that, under this positioning condition, the imaging clarity of the projected image meets the corresponding predetermined requirements, and the brightness uniformity of the projected image The corresponding predetermined requirements are met, and the virtual image distance of the projected image meets the corresponding predetermined requirements. Under the adjusted positioning, the gap between the projection lens 13 and the first rigid structural member 121 is determined.
- the projection lens 13 is fixed relative to the first rigid structural member 121 through a connecting medium such as colloid, and the colloid is placed in the gap between the projection lens 13 and the first rigid structural member 121 .
- the projection module 10 of the embodiment shown in FIG. 1 can be obtained.
- the assembly error that has been generated in the assembly process in step S901 can be overcome, and the display chip can be 1130.
- the optical axes between the light converting element 1112 and the projection lens 13 are basically consistent, and the consistency of the optical axes is improved, which is beneficial to improve the quality of the projected image.
- the quality of the image projected by the projection module directly determines the quality of the image received by the human eye from the near-eye display device, and the two-dimensional pupil dilation of the image by the waveguide sheet of the near-eye display device also has angular requirements for the received light, That is, the incident light of the waveguide sheet needs to be within an angle range, so that the light can be transmitted and expanded in the waveguide sheet; therefore, the light rays of different angles of each field of view emitted by the projection module must meet the corresponding angle requirements.
- the relative positional relationship (such as angle and distance) between the group and the waveguide sheet also has corresponding precision requirements.
- the X direction, the Y direction and the Z direction are defined based on the orientation of the near-eye display device, wherein the Y direction is a substantially horizontal direction, which is parallel to the direction in which the eyes of the human eye are located, and the Z direction corresponds to the near-eye display.
- the X direction is substantially perpendicular to the YOZ plane and is substantially parallel to the outcoupling direction of the waveguide sheet, wherein the positive direction of the X direction is opposite to the coupling out direction of the waveguide sheet.
- the near-eye display device 200 mainly includes the projection module 10 , the waveguide sheet 230 and the bracket 210 .
- the projection module 10 can use the projection module of any of the above embodiments, and the projection image projected by the projection module 10 has little distortion and good quality.
- the bracket 210 is used for carrying and positioning the projection module 10 and the waveguide sheet 230; the waveguide sheet 230 and the projection module 10 are positioned and installed on the bracket 210, so that the center of the light projected by the projection module 10 roughly falls on the waveguide sheet 230 at the center of the coupling region 232 .
- the two projection modules 10 on the left and right sides corresponding to the eyes can be fixedly installed on the bracket 210 along the X direction, so that each projection module 10 is substantially vertical It is positioned and installed on the bracket 210 in alignment with the coupling region 232 of the waveguide sheet 230; specifically, during the assembly process between each projection module 10 and the bracket 210, the position can be determined by the limiting structure first, and then painted with glue.
- the relative positions of the two are fixed by means of exposure, so that each projection module 10 is fixedly installed on the bracket 210 , for example, on the support plate 213 of the fixed installation bracket 210 .
- the support plate 213 can replace the support plate 123 of the projection module 10 (see FIG. 1 ), or can be integrally provided with the support plate 123 of the projection module 10 .
- the waveguide sheet 230 has an in-coupling area 232 , an out-coupling area 231 and a glue-painting area 233 ;
- the coupling-in area 232 is used to receive the light projected by the projection module 10 and transmit it in the waveguide sheet and two-dimensional pupil dilation, the final image light is output from the coupling-out area 231 and observed by the human eye;
- the glue-painting area 233 reserved on the waveguide sheet 230 is not subjected to grating engraving.
- the specific position of the coupling region 232 on the waveguide sheet 230 can be set according to the installation orientation of the projection module 10 on the bracket 210 , so as to facilitate the projection image of the projection module 10 to enter the coupling region 232 .
- the angle between the light and the surface of the waveguide sheet 230 will affect the transmission efficiency of the waveguide sheet, and an unsuitable coupling angle will also cause distortion of the finally observed image; therefore, for the waveguide sheet 230 Perform real-time active adjustments for optimal image quality. It is worth noting that since there are always errors in the grating engraving on the waveguide sheet 230, active adjustment of the waveguide sheet 230 can also compensate for the influence of this part of the error on the output image.
- the light center of the projection module 10 just falls in the center of the coupling region 232 of the waveguide sheet, which ensures that the projected image is not distorted, and reduces the amount of light. can lose.
- the two projection modules 10 are approximately located on the outcoupling side of the waveguide sheet 230 (ie, the side corresponding to the human eye), so that the projection modules 10 can be coupled from the outcoupling side to the waveguide sheet Coupling region 232 of 230 projects a projected image.
- the projection module 10 can also be located approximately on the opposite side of the out-coupling side of the waveguide sheet 230 , so that the projection module 10 can project the projection from the opposite side of the out-coupling side to the coupling-in region 232 of the waveguide sheet 230 image.
- receiving structures 220 are formed on the support 210, for example, two left and right receiving structures 220 corresponding to the two waveguide sheets 230 respectively; the receiving structures 220 at least partially receive the waveguide sheets 230; the waveguide sheet 230 is opposite to the support
- the waveguide sheet 230 can be positioned and installed on the bracket 210 through the colloid 221 in the receiving structure 220, so that the center of the light projected by the projection module 10 roughly falls on the waveguide sheet 230. the center of the coupling region 232 .
- the colloid 221 in the receiving structure 220 may be arranged on both sides corresponding to the glue area 233 of the waveguide sheet 230 (see FIG. 12 ), and the colloid 221 on each side is located between the waveguide sheet 230 and the inner wall of the receiving structure 220
- the colloid 221 may be arranged on one side relative to the glue area 233 of the waveguide sheet 230 (see FIG. 21 ), and the colloid 221 arranged on one side is located between the waveguide sheet 230 and the inner wall of the receiving structure 220 . It will be understood that arranging the glue 221 on both sides (ie, double-sided painting glue) can effectively balance the effect of the deformation caused by the curing of the glue on the waveguide sheet 230 .
- a plurality of glue injection holes 211 are provided at positions corresponding to the receiving structure 220 of the bracket 210 and the glue drawing area 233 of the waveguide sheet 230.
- the glue can be injected from the plurality of glue injection holes 211 to the receiving structure. 220 and contact with the drawing glue area 233, and then expose and cure the glue.
- the main support 210b of the support 210 (which is located on the outcoupling side of the waveguide sheet 230 ) and the sub-support 210a (which is located on the opposite side of the outcoupling side of the waveguide sheet 230 ) may correspond respectively to A front glue injection hole 211b and a rear glue injection hole 211a are provided.
- a protrusion (not shown in the figure) is provided on the inner wall of the receiving structure 220, and the protrusion protrudes toward the waveguide sheet 230, and its shape may be but not limited to zigzag, rectangle, triangle, etc.; the protrusion may be used to increase the The surface area of the colloid 221 in contact with the inner wall of the receiving structure 220 increases the adhesive force.
- the inner wall of the receiving structure 220 is provided with a glue overflow groove 212 (see FIG. 12 ), the glue overflow groove 212 can be used to accommodate excess glue, and the edge of the bracket can also have a glue overflow prevention structure; the glue overflow groove 212 Specifically, it may be disposed at the corner of the inner wall of the receiving structure 220 .
- the edge of the bracket 210 may further be provided with an anti-overflow glue structure to prevent the glue before curing from overflowing and contaminating the optical area of the waveguide sheet 230 .
- the receiving structure 220 may be a cavity structure surrounded by the main support 210b and the auxiliary support 210a, and each waveguide sheet 230 is positioned and installed in one receiving structure 220 between the main support 210b and the auxiliary support 210a; receiving
- the width of the structure 220 in the x-direction is greater than the thickness of the waveguide sheet 230.
- the width of the receiving structure 220 can be set so that when the waveguide sheet 230 is received and fixed, there is a single gap between the waveguide sheet 230 and the inner wall of the receiving structure 220.
- the side gap 223 is in the range of 0.25 mm or more and 1 mm or less (eg, 0.5 mm, 0.8 mm, etc.); thus, the positioning of the waveguide sheet 230 in the receiving structure 220 before the waveguide sheet 230 is fixed to the receiving structure 220 It can be adjusted online, that is to say, the receiving structure 220 provides a redundant space for adjusting the positioning of the waveguide sheet 230 relative to the bracket 210 .
- the bracket 210 may be a split bracket, wherein the main bracket 210b and the sub bracket 210a are detachably and fixedly connected together to form the receiving structure 220.
- the main bracket 210b and the sub bracket 210a may be fixedly connected to the receiving structure 220 by screws. Together.
- the main bracket 210b and the sub bracket 210a may be bonded together by glue or the like to form the receiving structure 220 .
- the bracket 210 can also be an integrated bracket.
- the projection module 10 is positioned and installed on the support plate 213 and the display chip 1130 or the projection lens 13 needs to be actively adjusted (that is, the case where the active adjustment is performed on the main bracket 210 b )
- the sub bracket 210a is not installed on the main bracket 210b, so as to prevent the sub bracket 210a from blocking the projection module 10 in its light exit.
- the extension direction is convenient to use the receiving camera 91 for active adjustment.
- the sub bracket 210a can be fixed on the main bracket 210b by screws or glue.
- the sub-support 210a may be fixedly disposed relative to the main support 210b in a positioning manner that avoids the coupling region 232 of the waveguide sheet 230 (not shown in the figure), so that the sub-support 210a will not substantially block the projection.
- the extension direction of the light output of the module 10 facilitates the active adjustment of the projection module 10 on the main bracket 210b.
- the positioning of the waveguide sheet 230 relative to the projection module 10 can be actively adjusted and determined before it is cured by the colloid 221 .
- the positioning of the waveguide sheet 230 relative to the projection module 10 will be described in the following assembly method illustrated in FIG. 23 .
- FIG. 14 to 18 illustrate a near-eye display device 300 according to a second embodiment of the present invention and a waveguide sheet 230 used therefor.
- the main difference between the near-eye display device 300 of the second embodiment and the near-eye display device 200 of the first embodiment is that the projection module 10 is positioned and installed on the bracket 210 substantially parallel to the coupling region 232 of the waveguide sheet 230 .
- a refractive prism 340 is arranged between the projection module 10 and the coupling region 232 of the waveguide sheet 230 , and the refractive prism 340 is positioned and installed relative to the bracket 230 so that the center of the light projected by the projection module 10 falls after being refracted by the prism 340 At the center of the coupling region 232 of the waveguide sheet 230 .
- the projection modules 10 on the left and right sides are arranged opposite to each other along the Y axis, and the light projected by each projection module 10 is refracted by a refractive prism 340 and enters the coupling region 232 of the waveguide sheet 230 .
- the projection module 10 and the bracket 210 can be pre-connected through the step bearing surface on the support plate 213, the limit structure such as the limit hole 1232, and then the glue is drawn in the glue groove 1231 and exposed, and the relative positions of the two are fixed ( See Figure 17).
- the refractive prism 340 and the bracket 210 can be pre-connected by limiting structures such as limiting posts 341, and then glue is drawn in the glue drawing groove 342 and exposed to fix their relative positions (see FIG. 17).
- the receiving structure 220 may be a semi-open cavity structure formed by the integrated support 210; the colloid 221 may be arranged on one side relative to the glue area 233 of the waveguide sheet 230 (see FIG. 21 ), one side
- the ground-arranged colloid 221 is located between the waveguide sheet 230 and the inner wall of the receiving structure 220 .
- FIG. 22 is a schematic structural diagram of a near-eye display device according to a fourth embodiment of the present invention.
- the main difference between the near-eye display device 500 of the fourth embodiment and the near-eye display device 200 of the first embodiment is that the bracket 210 has an escape port 213 at a position corresponding to the coupling region 232 of the waveguide sheet 230 , and the escape port 213 It is used to avoid the light projected by the projection module 10).
- the sub-bracket 210 a basically does not block the extending direction of the projection module 10 in the light exiting direction, which facilitates the active adjustment of the projection module 10 on the bracket 210 .
- the escape ports 213 may be specifically arranged on the left and right sides of the sub-support 210a.
- the following describes an assembling method of a near-eye display device according to an embodiment of the present invention with reference to the near-eye display device 200 of the first embodiment and FIG. 23 .
- step S2301 the projection module 10 is positioned and installed on the bracket 210;
- step S2302 the positioning of the waveguide sheet 230 relative to the bracket 210 is adjusted until the center of the light projected by the projection module 10 falls on the center of the coupling region 232 of the waveguide sheet 230 .
- the interval can be used to fine-tune the waveguide sheet 230, and the unilateral gap value is 0.25mm-1mm, For example, 0.55mm; it should be noted that if the gap is too small, the reserved adjustment space will be insufficient, causing interference between the waveguide sheet 230 and the bracket 210, and if the gap is too large, the colloid will be too much, making the colloid difficult to cure , The shrinkage of the colloid during curing is relatively large, which is easy to cause a decrease in reliability.
- a specific image projected by the projection module 10 can be received by the receiving device (for example, the receiving camera 91 ) provided on the side of the human eye, and the waveguide sheet 230 can be positioned on the X-axis, Y-axis, Z-axis in real time by means of an external positioning system
- the axis, XOY plane, YOX plane, and XOZ plane are actively adjusted in the six degrees of freedom directions, and the optimal installation position of the waveguide sheet 230 can be determined by recognizing the received images.
- the distance between the receiving device and the waveguide sheet 230 can simulate the distance between the human eye and the waveguide sheet 230, for example, 1 cm-2 cm, and the projection module 10 can project a predetermined image such as a cross-hair image.
- the position of the received cross line is adjusted on the XOZ plane and the YOX plane.
- a standard cross pattern can be set on the camera lens of the receiving device, and by judging the projection module 10 received by the receiving device.
- the positional relationship between the cross line and the standard cross pattern is used to determine the direction and/or size of the waveguide sheet 230 that needs to be adjusted; through the light and dark test of the image, the position of the waveguide sheet is adjusted on the X-axis, the Y-axis, and the X-axis to ensure the best brightness. uniformity.
- the cross pattern used in this method is only an exemplary pattern, for example, the cross pattern can be replaced with other patterns such as dot matrix; in addition to automatic active calibration using software, using a more intuitive cross pattern is also convenient for manual calibration. , when the adjustment range exceeds the upper limit set by the software, it can also be manually calibrated manually to reduce the defective rate of the product.
- the bracket 210 may be provided with marking points, which are used to directly position and install the waveguide sheet 230 relative to the bracket 210 through machine vision technology; The position of the waveguide sheet 230 is adjusted on the plane, and further, the relative positions of the waveguide sheet 230 and the projection module 10 can also be aligned directly using the identification of the marking points.
- the active adjustment process of the waveguide sheets 230 in the above example can be repeated for each waveguide sheet 230, although the waveguide sheets 230 may obtain different positioning results.
- Step S2303 fixing the waveguide sheet 230 relative to the bracket 210 under the adjusted positioning.
- the position of the waveguide sheet 230 is determined, and glue is injected into the glue drawing area 233 of the waveguide sheet 230 through the glue injection holes 211 on both sides of the bracket 210, and the exposure is performed through the glue injection holes 211. and curing the colloid 211 , so that the waveguide sheet 230 is fixed relative to the bracket 210 .
- the relative positions of the waveguide sheet 230 and the projection module 10 can be adjusted in the five-degree-of-freedom direction by means of active calibration. After the image is identified, the relative position of the waveguide sheet 230 and the projection module 10 can be accurately determined; moreover, it can be fixed by gluing and exposure, and few mechanical structural parts are used, the assembly tolerance of the near-eye display device is low, and the assembly process is low. simpler. As a result, the assembling method of the above example obtains a near-eye display device and can provide images of high imaging quality.
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Abstract
本发明涉及一种投影模组及其组装方法和包括投影模组的近眼显示设备。本发明的投影模组包括投影显示装置和投影镜头,所述投影显示装置包括照明组件和带有显示芯片的显示模块;其还包括刚性结构件,所述照明组件的转光元件固定安装于所述刚性结构件,所述显示模块与所述刚性结构件之间具有间隙。本发明的投影模组光轴一致性好、投影图像不易失真且质量好。
Description
本发明属于投影显示技术领域,具体地涉及一种投影模组、投影模组的组装方法以及包括投影模组的近眼显示设备。
近眼显示设备受到越来越多的关注,近眼显示设备可以选择使用虚拟现实(Virtual Reality,VR)技术和增强现实(Augmented Reality,AR)技术来投影成像。相比于VR,AR能基于实现物理环境下构建虚拟景象,带给使用者全新的体验。
AR技术可以使用波导片方案(即使用光源、投影镜头加波导片),也可以使用传统的Birdbath方案。传统的Birdbath方案由于体积较大、视场角难以进一步提升、相对差的体验等问题,其难以受到消费者的亲耐;而使用波导片方案中,使用者的眼前主要仅设置一个波导片,近眼显示设备变得更为小巧美观,用户体验也更佳。因此,使用波导片方案的近眼显示设备越来越受被用户接收。
使用波导片方案的近眼显示设备主要包括投影模组(例如光机)以及波导片。其中,投影模组将图像投影到波导片内,通过波导片将图像进行二维扩瞳,进而进入人眼。
发明内容
按照本发明的第一方面,提供一种投影模组,其包括投影显示装置和投影镜头,所述投影显示装置包括照明组件和带有显示芯片的显示模块;其还包括刚性结构件,所述照明组件的转光元件固定安装于所述刚性结构件,所述显示模块与所述刚性结构件之间具有间隙。
根据一些附加或替代实施方案,所述间隙中设置有连接介质,所述连接介质将所述显示模块固定于所述刚性结构件上。
根据一些附加或替代实施方案,所述刚性结构件的一侧开有第一开窗,所述显示模块固定于对应所述第一开窗的开窗处,并且,所述显示模块与所述转光元件分别位于所述第一开窗的两侧。
根据一些附加或替代实施方案,所述间隙在大于等于0.05mm且小于等于1mm的范围内,或者进一步地在大于等于0.1mm且小于等于0.6mm的范围内。
根据一些附加或替代实施方案,所述间隙被构造为:确定所述显示芯片相对所述照明组件的定位,以至于在该确定的定位下所述投影镜头输出的图像投影图像符合预定要求。
根据一些附加或替代实施方案,所述投影图像符合预定要求包括:所述投影图像的成像清晰度符合相应的预定要求、所述投影图像的亮度均匀性符合相应的预定要求、和所述投影图像的虚像符合相应的预定要求;或者还包括:所述投影图像能够以基本水平或基本垂直的方位进入人眼。
根据一些附加或替代实施方案,所述显示模块通过所述间隙中的固化的连接介质固定于所述刚性结构件上,以至于所述显示芯片基于所述确定的定位被固定在所述投影模组中。
根据一些附加或替代实施方案,所述照明组件包括光源模块;
其中,所述转光元件用于将所述光源模块发出的光线至少部分地转折到所述显示芯片、和/或将所述显示芯片返回的光线至少部分地转折到所述投影模组的投影镜头。
根据一些附加或替代实施方案,所述第一开窗被构造为使所述显示模块能够从所述刚性结构件的外侧定位安装在对应所述第一开窗的开窗处。
根据一些附加或替代实施方案,所述显示模块包括用于贴附所述显示芯片的基板;
其中,在所述基板的边沿部分和对应所述第一开窗的用于支撑定位所述基板的台阶之间,设置用于将所述显示模块固定于所述刚性结构件上的连接介质。
根据一些附加或替代实施方案,所述连接介质的厚度在在大于等于0.05mm且小于等于1mm的范围内,或者进一步地在在大于等于0.1mm且小于等于0.6mm的范围内。
根据一些附加或替代实施方案,所述连接介质被构造为能够密封所述间隙。
根据一些附加或替代实施方案,所述连接介质具有厚度不均匀的厚度布置,以至于使所述显示模块相对所述刚性结构件倾斜定位。
根据一些附加或替代实施方案,所述投影模组还包括支持板;
其中,所述支持板上设置有画胶槽和限位结构,所述画胶槽中设置有用于固定安装所述刚性结构件的连接介质,所述限位结构对应所述刚性结构件设置并用于将所述刚性结构件限位安装于所述支持板上。
根据一些附加或替代实施方案,所述刚性结构件的外壁上还设置有朝向所述光源模块的第二开窗和朝向所述投影镜头的第三开窗;
其中,所述投影镜头定位安装在所述第三开窗上,以至于所述投影镜头相对所述投影显示装置定位安装。
根据一些附加或替代实施方案,在所述投影镜头相对所述刚性结构件的定位被调校好的情况下通过期望的厚度布置和/或形状的连接介质将所述投影镜头定位安装在所述第三开窗上。
按照本发明的第二方面,提供一种近眼显示设备,其包括:波导片、以上任一所述的投影模组以及支架;
其中,所述波导片和所述投影模组被定位安装在所述支架上以至于使所述投影模组投射出的光线中心落在所述波导片的耦入区的中心。
根据一些附加或替代实施方案,所述支架上开有接收结构,其用于至少部分地接收所述波导片;
其中,在所述波导片相对所述支架的定位被调校好的情况下通过接收结构中的连接介质将所述波导片定位安装在所述支架上,以至于使所述投影模组投射出的光线中心落在所述波导片的耦入区的中心。
根据一些附加或替代实施方案,所述连接介质对应所述波导片的画胶区双侧地布置并位于所述波导片与所述接收结构的内壁之间;或者所述连接介质相对所述波导片的画胶区单侧地布置并位于所述波导片与所述接收结构的内壁之间。
根据一些附加或替代实施方案,所述接收结构的内壁上设置有用于增大所述连接介质与该内壁接触的表面积的突起。
根据一些附加或替代实施方案,所述接收结构的内壁上设置有溢胶槽。
根据一些附加或替代实施方案,所述波导片与所述接收结构的内壁之间的单侧间隙在大于等于0.25mm且小于等于1mm的范围内。
根据一些附加或替代实施方案,在所述支架的对应所述接收结构和所述波导片的画胶区位置设置有多个注胶孔。
根据一些附加或替代实施方案,所述投影模组大致位于所述波导片的耦出侧,或者所述投影模组大致位于所述波导片的耦出侧的相对侧。
根据一些附加或替代实施方案,所述投影模组基本垂直对准所述波导片的耦入区地定位安装在 所述支架上。
根据一些附加或替代实施方案,所述投影模组基本平行所述波导片的耦入区地定位安装在所述支架上,在所述投影模组与所述波导片的耦入区之间设置有折射棱镜,所述折射棱镜相对所述支架定位安装以至于使所述投影模组投射出的光线中心在经由所述棱镜折射后落在所述波导片的耦入区的中心。
根据一些附加或替代实施方案,所述支架在对应所述波导片的耦入区的位置开有用于避让所述投影模组投射出的光线的避让口。
根据一些附加或替代实施方案,所述支架包括主支架和副支架,其中,所述主支架和副支架可拆卸地固定连接在一起并形成用于至少部分地接收所述波导片的接收结构,所述波导片被定位安装在所述主支架和副支架之间的接收结构中,所述投影模组被定位安装在所述主支架的左右两侧。
根据一些附加或替代实施方案,并且所述副支架以避开所述波导片的耦入区的定位方式相对所述主支架固定设置。
根据一些附加或替代实施方案,所述支架上设置有标记点,其用于通过机器视觉技术将所述波导片相对所述支架直接地定位安装。
按照本发明的第三方面,提供一种投影模组的组装方法,其包括步骤:
将所述投影模组的照明组件进行组装,其中将所述照明组件的转光元件固定安装于刚性结构件;
将带有显示芯片的显示模块设置于所述投影模组的预设位置,以至于使所述显示模块与所述刚性结构件之间留有初始间隙;
在所述预设位置的基础上,调校所述显示模块相对所述照明组件的定位,直到所述投影模组的投影镜头输出的投影图像符合预定要求,相应地,所述初始间隙被调整确定为调校后的间隙;以及
在调校好的定位下将所述显示模块相对所述照明组件进行固定。
根据一些附加或替代实施方案,在所述调校步骤中,以主动方式校准好所述显示芯片相对已组装好的所述照明组件的定位,或利用机器视觉技术调整好所述显示芯片相对已组装好的照明组件的定位。
根据一些附加或替代实施方案,所述投影图像符合预定要求包括:所述投影图像的成像清晰度符合相应的预定要求、所述投影图像的亮度均匀性符合相应的预定要求、和所述投影图像的虚像距符合相应的预定要求;或者还包括:所述投影图像能够以基本水平或基本垂直的方位进入人眼。
根据一些附加或替代实施方案,将所述投影模组的照明组件进行组装的步骤包括:
将所述照明组件的转光元件和光源模块分别固定安装在第一刚性结构件和第二刚性结构件的内部;和
将所述第一刚性结构件和第二刚性结构件固定安装在支持板上。
根据一些附加或替代实施方案,将所述投影模组的照明组件进行组装的步骤还包括:
在将所述第一刚性结构件和第二刚性结构件固定安装在支持板上之前,将所述第一刚性结构件和第二刚性结构件通过卡接方式进行彼此定位并连接。
根据一些附加或替代实施方案,所述预设位置位于固定安装有转光元件的刚性结构件的外侧;
在所述调校步骤中,从所述刚性结构件的外侧调校带有所述显示芯片的显示模块相对所述刚性结构件的定位,从而调校好所述显示芯片相对所述照明组件的定位。
根据一些附加或替代实施方案,所述调校包括以下一项或多项:
调整所述显示模块相对所述刚性结构件的倾斜角度,直到所述投影模组的投影镜头输出的投影 图像的成像清晰度符合相应的预定要求;
将所述显示模块在xoy平面内相对所述刚性结构件平移,直到所述投影图像的亮度均匀性符合相应的预定要求,其中,所述xoy平面基于垂直于从所述照明组件的转光元件射向所述显示芯片的光线的方向;
将所述显示模块沿z方向相对所述刚性结构件平移,直到所述投影图像的虚像距符合相应的预定要求,其中所述z方向为从所述照明组件的转光元件射向所述显示芯片的光线的方向;
将所述显示模块在所述xoy平面上相对所述刚性结构件旋转,直到所述投影图像能够以基本水平或基本垂直的方位进入人眼。
根据一些附加或替代实施方案,在固定步骤中,通过连接介质将所述显示芯片所贴附的基板相对所述照明组件的固定安装有转光元件的刚性结构件进行固定。
根据一些附加或替代实施方案,所述调校步骤中,通过调校所述显示芯片相对已组装好的所述照明组件的定位,来调整确定所述显示模块与所述刚性结构件之间的初始间隙以获得所述调校后的间隙;其中,所述连接介质置于所述调校后的间隙。
按照本发明的第四方面,提供一种投影模组的组装方法,其包括步骤:
将所述投影模组的投影显示装置进行组装;
将所述投影模组的投影镜头设置于所述投影模组的预设位置;
在所述预设位置的基础上,调校所述投影镜头相对所述投影显示装置的定位,直到所述投影模组的投影镜头输出的投影图像符合预定要求;以及
在调校好的定位下将所述投影镜头相对所述投影显示装置进行固定。
根据一些附加或替代实施方案,在所述调校步骤中,以主动方式校准好所述投影镜头相对已组装好的所述投影显示装置的定位,或利用机器视觉技术调整好所述投影镜头相对已组装好的所述投影显示装置的定位。
根据一些附加或替代实施方案,所述投影图像符合预定要求包括:所述投影图像的成像清晰度符合相应的预定要求、所述投影图像的亮度均匀性符合相应的预定要求、和所述投影图像的虚像符合相应的预定要求。
根据一些附加或替代实施方案,将所述投影模组的投影显示装置进行组装的步骤包括:
将所述照明组件的转光元件和光源模块分别固定安装在第一刚性结构件和第二刚性结构件的内部;
将所述刚性结构件和第二刚性结构件固定安装在支持板上;和
将所述显示芯片固定安装在所述第一刚性结构件上。
根据一些附加或替代实施方案,将所述投影模组的投影显示装置进行组装的步骤还包括:
在将所述刚性结构件和第二刚性结构件固定安装在支持板上之前,将所述刚性结构件和第二刚性结构件通过卡接方式进行彼此定位并连接。
根据一些附加或替代实施方案,所述预设位置位于固定安装有转光元件的刚性结构件的外侧;
所述调校步骤中,从所述刚性结构件外侧调校所述投影镜头相对所述刚性结构件的定位,从而调校好所述投影镜头相对所述投影显示装置的定位。
根据一些附加或替代实施方案,所述调校包括以下一项或多项:
调整所述投影镜头相对固定安装有转光元件的刚性结构件的倾斜角度,直到所述投影镜头输出的投影图像的成像清晰度符合相应的预定要求;
将所述投影镜头在xoy平面内相对所述刚性结构件平移,直到所述投影图像的亮度均匀性符合相应的预定要求,其中,所述xoy平面基于垂直于从所述照明组件的转光元件射向所述显示芯片的光线的方向;
将所述投影镜头沿z方向相对所述刚性结构件平移,直到所述投影图像的虚像符合相应的预定要求,其中所述z方向为从所述照明组件的转光元件射向所述显示芯片的光线的方向。
根据一些附加或替代实施方案,在固定步骤中,通过连接介质将所述投影镜头相对所述照明组件的固定安装有转光元件的刚性结构件进行固定。
根据一些附加或替代实施方案,所述调校步骤中,通过调校所述投影镜头相对已组装好的投影显示装置的定位,来确定所述投影镜头与固定安装有转光元件的刚性结构件之间的间隙;其中,所述连接介质置于所述间隙。
按照本发明的第五方面,提供一种近眼显示设备的组装方法,其包括步骤:
将投影模组定位安装在支架上;
调校所述波导片相对所述支架的定位,直到使所述投影模组投射出的光线中心落在所述波导片的耦入区的中心;以及
在调校好的定位下将所述波导片相对所述支架进行固定。
根据以下描述和附图本发明的以上特征、操作和优点将变得更加明显。
从结合附图的以下详细说明中,将会使本发明的上述和其他目的及优点更加完整清楚,其中,相同或相似的要素采用相同的标号表示。
图1是按照本发明一实施例的投影模组的基本结构示意图,其中示出了投影模组在调校过程中使用到的接收相机。
图2是图1实施例的投影模组从另一视角示出的基本结构示意图。
图3是图1所示实施例的投影模组的第一刚性结构及其上固定安装的转光元件和投影镜头的结构示意图。
图4是图1所示实施例的投影模组的第一刚性结构及其上固定安装的转光元件和投影镜头以及显示模块的结构示意图。
图5是图1所示实施例的投影模组的一光路原理示意图。
图6是图1所示实施例的投影模组的又一光路原理示意图。
图7是按照本发明又一实施例的投影模组的一光路原理示意图。
图8是按照本发明一实施例的投影模组的组装方法的流程图。
图9是按照本发明又一实施例的投影模组的组装方法的流程图。
图10是按照本发明第一实施例的近眼显示设备的结构示意图。
图11是图10所示实施例的近眼显示设备从另一视角示出的结构示意图。
图12是图10所示实施例的近眼显示设备的俯视图,其中还示出了关于接收结构的局部区域A的放大图。
图13是按照本发明第一实施例的近眼显示设备所使用的波导片的结构示意图,其中,图13(a)和图13(b)分别从不同视角示出了波导片。
图14是按照本发明第二实施例的近眼显示设备的结构示意图。
图15是图14所示实施例的近眼显示设备从另一视角示出的结构示意图。
图16是图14所示实施例的近眼显示设备的俯视图,其中还示出了关于接收结构的局部区域B的放大图。
图17是定位安装图14所示实施例的近眼显示设备的投影模组的示意图。
图18是按照本发明第二实施例的近眼显示设备所使用的波导片的结构示意图,其中,图18(a)和图18(b)分别从不同视角示出了波导片。
图19至图21是按照本发明第三实施例的近眼显示设备的结构示意图。
图22是按照本发明第四实施例的近眼显示设备的结构示意图。
图23是按照本发明一实施例的近眼显示设备的组装方法的流程图。
下面通过参照其中图示了本发明示意性实施例的附图更为全面地说明本发明。但本发明可以按不同形式来实现,而不应解读为仅限于本文给出的各实施例。给出的上述各实施例旨在使本文的披露全面完整,从而使对本发明保护范围的理解更为全面和准确。
下面的描述中,为描述的清楚和简明,并没有对图中所示的所有多个部件进行描述。附图中示出了多个部件为本领域普通技术人员提供本发明的完全能够实现的公开内容。对于本领域技术人员来说,许多部件的操作在本发明内容下都是熟悉而且明显的。
本文中,“上”、“下”、“左”、“右”、“前”、“后”的方位术语是相对于附图中的投影模组/近眼显示设备安装使用后的方位或者相对附图中所示的方位来定义的,并且,应当理解到,这些方向性术语是相对的概念,它们用于相对于的描述和澄清,其可以根据开闭装置所置放的方位的变化而相应地发生变化。
申请人还注意到,投影模组通常包括显示装置和投影镜头,显示装置和投影镜头的相对位置直接决定着投影图像的质量,然而,显示装置与投影镜头组装在一起时也不必避免地存在组装公差,使得投影模组所投影出的图像在到达人眼时会表现为失真等。另外,显示装置的多个部件(例如光源模块、显示芯片以及用于分光合光的光学元件)在组装过程也不可避免地存在组装公差,从而也容易导致投影模组的投影图像产生失真。
为方便理解和说明,在投影模组10的相关图中,基于投影模组的方位定义了x方向、y方向和z方向,其中,x方向对应于从转光元件射向投影镜头的光线的方向,z方向对应于从转光元件射向显示芯片的光线的方向,y方向基本垂直于xoz平面。
以下结合图1至图4示例说明本发明一实施例的投影模组10。以下示例的投影模组10可以在安装在近眼显示设备(例如图8的近眼显示设备200)上之前可以被主动调校好并进而组装好,从而可以克服投影模组10例如在组装过程产生的组装公差等,使投影模组10输出的投影图像(其可以被投影到波导片)具有良好的图像质量(例如失真小)。
参见图1和图2,本发明实施例的投影模组10包括投影显示装置11和投影镜头13,投影显示装置11可以包括照明组件111、带有显示芯片1130的显示模块113。投影模组10或照明组件111还可以包括第一刚性结构件121。为方便理解,图1至图4中示意出了相对第一刚性结构件121分离设置的显示模块113,将理解,投影模组10在被组装好以后,显示模块113是被定位固定在第一刚性结构件121上。
照明组件111可以包括光源模块1110和至少一转光元件1112,转光元件1112可以将光源模块 1110发出的光线至少部分地转折到显示芯片1130(参见图5,光源模块1110发出的光线的S光被转折地反射到LCOS芯片)、或者可以将显示芯片1130返回的光线至少部分地转折到投影镜头13(参见图6,用于形成投影图像的S光被转折地反射到所述投影镜头13),因此,转光元件1112可以具有分光合光作用,其具体可以但不限于是图5和图6中示例的PBS(Polarization Beam Splitter,偏振分光)棱镜,其也可以是例如如图7中示出的TIR(Total Internal Reflection全内反射)棱镜。示例地,光源模块1110可以包括光源等,也还可以对应光源设置均光元件(例如准直镜),光源发出的光线经过匀光元件后进入转光元件1112;进一步,光源还可以设置为两个或者三个(例如红色光源、蓝色光源、滤色光源),三个对应的光源器件可以设置在一个结构件中,然后通过合色光学元件组合后形成RGB光源。将理解,光源模块1110的具体设置不是限制性的。
显示模块113的显示芯片1130可以是被动发光显示器,例如,其具体可以是LCOS(Liquid Crystal on Silicon,硅上液晶)芯片(如图5和图6)或DLP(Digital Light Processing,数字光学处理)芯片(如图7所示)等,显示模块113还包括用于安装显示芯片1130的基板1131,其中,显示芯片1130可以预先贴装在基板1131内侧,在组装过程中,显示芯片1130和基板1131相对例如第一刚性结构件121的定位可以一起地被调校。
继续如图1至图4所示,投影模组10或照明组件111还包括第二刚性结构件122,并且,对应第一刚性结构件121设置有支持板123,第一刚性结构件121、第二刚性结构件122和支持板123用于定位安装照明组件111的各个光学元件以使照明组件111被组装好以后其光路固定。
其中,第一刚性结构件121和第二刚性结构件122可以被固定安装在支持板123上;第一刚性结构件121可以大致构造为六面体,第一刚性结构件121的内腔中可以至少容纳并固定有转光元件1112(参见图3和图4)。在一实施例中,第一刚性结构件121还可以用于定位安装显示模块113和/或投影镜头13;第二刚性结构件122可以大致构造为六面体,第二刚性结构件122的内腔中可以容纳并固定有光源模块1110,例如光源模块1110的光源、准直镜等被固定安装在第二刚性结构件122的内腔中。
将理解,第一刚性结构件121和第二刚性结构件122在组装之前是彼此分离的,它们彼此定位安装;在其他实施例中,第一刚性结构件121和第二刚性结构件122也可以一体地设置。
图5示出了图1实施例的投影模组的一光路原理示意图。参见图5,LCOS芯片表示显示芯片1130,其可以对光源进行调制后形成图像,PBS棱镜表示转光元件1112,光源和准直镜表示光源模块1110;在该实施例中,LCOS芯片、PBS棱镜和投影镜头13形成直线光路,通过在组装过程中固定它们的位置以使它们沿大致直线布置,可以形成所述直线光路。在投影成像过程中,光源发出的光线经由准直镜进入PBS棱镜,光线的S光可以通过PBS棱镜被转折地反射到LCOS芯片,LCOS芯片将其不同像素所接收的S光按比例可控地转换为用于形成投影图像的P光,P光直线穿过PBS棱镜并投向投影镜头13。因此,投影镜头13可以形成例如彩色投影图像投射出去。
图6示出了图1实施例的投影模组的又一光路原理示意图。参见图6,LCOS芯片表示显示芯片1130,其可以对光源进行调制后形成图像,PBS棱镜表示转光元件1112,光源和准直镜表示光源模块1110,并且还示出了图1中未具体示出的投影模组10的反射镜;在该实施例中,LCOS芯片、PBS棱镜和投影镜头13形成直线光路,通过在组装过程中固定它们的位置以使它们沿大致直线布置,可以形成所述直线光路。在投影成像过程中,光源发出的光线经由准直镜进入PBS棱镜,光线的S光通过PBS棱镜被基本全部转折地反射到波片(其未被示出)和全反射镜上,波片将S光转换为P光,然后P光被全反射镜反射到PBS棱镜,P光穿过PBS棱镜并投向LCOS芯片,LCOS芯片将不 同像素所接收的P光按比例可控地转换为用于形成投影图像的S光,用于形成投影图像的S光通过PBS棱镜被转折地反射到投影镜头13。因此,投影镜头13可以形成例如彩色投影图像投射出去。
由图5或图6所示的光路可见,投影模组10光路复杂、内部器件繁多,除去各种器件本身制造的精度误差之外,在众多器件的组装过程中也不可避免的会有误差,更重要的是,显示芯片113调制入射光线以形成图像,所以其组装精度容易直接关系到投影图案的质量,并且显示芯片113本身对入射光线角度要求较高,需在一定范围内,否则会使得投射图像容易产生负面效果(例如像差或者色差等)。
为克服例如组装误差等导致的图像失真等问题,在一实施例中,显示模块113与第一刚性结构件121之间具有间隙(图中未示出),该间隙反映显示芯片1130相对照明组件111的定位;在组装好的投影模组10中,该间隙中设置有连接介质(例如固化的胶体),该连接介质将显示模块113固定于第一刚性结构件121上。
将理解,在设置连接介质前(例如在画胶前),该间隙是活动的从而允许调整显示模块113相对第一刚性结构件121的定位,在设置连接介质后(例如胶体固化后),该间隙被确定并被固定,显示模块113相对第一刚性结构件121的定位被固定,也即显示芯片1130相对照明组件111的定位被固定。因此,该间隙的存在将允许显示模块113/显示芯片1130的定位可以在照明组件111基本已经组装好以后还可以被主动调校,直到调校至投影镜头13输出的投影图像符合预定要求;并且,反映显示模块113的较好的定位的间隙容易通过胶体等连接介质固定,从而使调校好的显示模块113/显示芯片1130的定位始终反映在投影模组10中并被使用。因此,具有该间隙的投影模组10容易克服照明组件111的内部的难以避免的内部公差来实现投影镜头13和显示芯片1130之间的光轴基本一致,甚至来实现投影镜头13、转光元件1112、显示芯片1130之间的光轴基本一致。
显示模块113与第一刚性结构件121之间的间隙可以通过例如以下方式(即第一种方式)确定并固定:主动调校显示模块113整体相对第一刚性结构件121的定位然后通过例如胶体将显示模块113固定安装在第一刚性结构件121上。
在其他实施例中,投影镜头13与第一刚性结构件121之间具有间隙(图中未示出),该间隙反映投影镜头13相对投影显示装置11的定位;在组装好的投影模组10中,该间隙中设置有连接介质(例如固化的胶体),该连接介质将投影镜头13固定于第一刚性结构件121上。将理解,在设置该连接介质前(例如在画胶前),该间隙是活动的从而允许调整投影镜头13相对第一刚性结构件121的定位,在设置连接介质后(例如胶体固化后),该间隙被确定并被固定,投影镜头13相对第一刚性结构件121的定位被固定,也即,投影镜头13相对组装好的投影显示装置11的定位被固定。因此,该间隙的存在将允许投影镜头13的定位可以在投影显示装置11基本已经组装好以后还可以被主动调校,直到调校至投影镜头13输出的投影图像符合预定要求;并且,反映显示模块113的较好的定位的间隙容易通过胶体等连接介质固定,从而使调校好的投影镜头13的定位始终反映在投影模组10中并被使用。因此,具有该间隙的投影模组10容易克服投影显示装置11的内部的难以避免的内部公差(包括显示模块113的安装公差)来实现投影镜头13和显示芯片1130之间的光轴基本一致,甚至来实现投影镜头13、转光元件1112、显示芯片1130之间的光轴基本一致。
投影模组10与第一刚性结构件121之间的间隙可以通过例如以下方式(即第二种方式)确定并固定:主动调校投影镜头13整体相对第一刚性结构件121的定位然后通过例如胶体将投影镜头13固定安装在第一刚性结构件121上。
由于组装好的投影模组10中,投影镜头13和显示芯片1130之间的光轴一致性好,将有利于形 成高质量的投影图像,例如形成符合预定要求的投影图像。
在显示芯片1130或投影镜头13的上述定位过程中,可以使用如图1中示出的接收相机91来帮助确定定位;接收相机91可以固定地设置于投影模组10的光线输出位置,以接收投影图像;藉由该接收到的投影图像,可以实时调整显示芯片113与照明组件111的相对位置(在固定安装显示芯片113),或者可以实时调整投影镜头13与投影显示装置11的相对位置。
将理解,投影图像的预定要求可以提前地确定,例如,在组装精度好、投影镜头13和显示芯片1130之间的光轴一致性好的投影模组中预先确定该预定要求;在投影镜头13输出的投影图像(其可以通过接收相机91确定并获取其质量)符合预定要求的情况下,投影镜头13和显示芯片1130之间的光轴被确定为基本一致。具体地,投影图像符合预定要求包括:投影图像的成像清晰度符合相应的预定要求、投影图像的亮度均匀性符合相应的预定要求、和投影图像的虚像距符合相应的预定要求;或者还包括:投影图像能够以基本水平或基本垂直的方位进入人眼(在例如显示模块113可以在xoy平面上相对第一刚性结构件121旋转的情况下)。
如图1至图4所示,第一刚性结构件121整体可以为六面体结构,其中至少三个面具有开窗,其朝向光源模块1110的一面上开有第二开窗126(即光线入射窗),其朝向投影镜头13的一面上开有第三开窗127(即光线出射窗,其以将出射光线输出到投影镜头),其朝向显示模块113的一面上开有第一开窗124(显示窗)。光线入射窗、光线出射窗二者沿x方向布置,显示窗可以朝向z方向开口。
第一开窗124的外侧可以设置有台阶1212(参见图4),该台阶1212用于支撑并定位显示模块113,显示模块113经过主动调校后可以确定好其与照明组件111的相对位置(显示模块113与第一刚性结构件121之间的间隙被确定),并可以通过胶体固定于第一刚性结构件121的第一开窗124的开窗处,其中在台阶1212上设置胶体,通过胶体固定连接第一刚性结构件121的台阶和显示模块113的基板1131,这样可以形成以上描述的显示模块113与第一刚性结构件121之间的间隙。显示模块113与转光元件1112分别位于第一开窗124的例如上下两侧。
其中,基板1131具体可以但不限于为陶瓷或者金属基板,其具有较大的强度及散热性能。在调校显示模块113的定位过程中,显示模块113可通过夹持或者吸取的方式固定于外部的某一调整机构上,具有较大强度的陶瓷或金属基板可以使得其在被调整机构夹持或吸取的时候不易产生形变。可选地,基板1131上还包括一层线路板,显示芯片1130(例如LCOS芯片)电连接于该线路板。
显示模块113与第一刚性结构件121之间的固定的间隙在大于等于0.05mm且小于等于1mm的范围内;或者,在照明组件111的各光学元器件光轴一致性较高的情况下,显示模块113与第一刚性结构件121之间的固定的间隙在大于等于0.1mm且小于等于0.6mm的范围内。对应地,台阶1212上设置的连接介质(例如胶体)的厚度在在大于等于0.05mm且小于等于1mm的范围内,或者,进一步地,在照明组件111的各光学元器件光轴一致性较高的情况下,台阶1212上设置的连接介质(例如胶体)的厚度在在大于等于0.1mm且小于等于0.6mm的范围内。
将理解,连接介质(例如胶体)的厚度或者显示模块113与第一刚性结构件121之间的固定的间隙可以在上述范围内不相等地布置,以确保显示模块113相对第一刚性结构件121的各种倾斜定位。
在一实施例中,基板1131与第一刚性结构件121之间的胶体的形状被构造为能够密封基板1131与第一开窗124之间的所有间隙;例如,通过胶体可设置为一圈环形,从而可以密封第一刚性结构件121内部空间。这样,可以避免不希望的杂散光以及灰尘进入第一刚性结构件121内部。
进一步地,第三开窗127上设置有至少安装壁,其用于安装投影镜头13。在上述第一种方式中,投影镜头13可以先于显示模块113地通过胶体等连接介质固定在第三开窗127上,显示模块113再从第一刚性结构件121外侧定位安装在第一开窗124上(例如第一刚性结构件121的外路露的台阶1212上),以至于实现显示芯片1130相对照明组件111的精确定位安装。
需要说明的是,微型的投影模组10中不仅显示芯片1130和其他光学元件尺寸小,它们的安装空间也小,因此一般难以进行内部调校从而达到较高的光轴一致性;以上实施例的投影模组10可以将显示模块113固定在第一刚性结构件121的外侧、转光元件1112固定在第一刚性结构件121内侧,因此,显示模块113可以从第一刚性结构件121的外侧进行主动调校,有利于方便调校并获得准确的定位结果或间隙,也方便在定位被调校完成后进行固定安装(例如固定显示模块113与第一刚性结构件121之间的间隙);从而有利于获得更好的光轴一致性、提高投影图像的质量。
继续参见图1和图2,第二刚性结构件122的朝向转光元件1112的一面也开有窗口,以供光源发出的光线入射。第一刚性结构件121在安装于支持板123上之前,第一刚性结构件121和第二刚性结构件122可以彼此定位并连接在一起,这样,有助于提高第二刚性结构件122与第一刚性结构件121的安装精度,同时提高了光源及准直镜、PBS棱镜等光学元件的光轴一致性。
在一实施例中,第二刚性结构件122和/或第一刚性结构件121在两个结构件接触区域可以设置倒角或台阶等以形成画胶区233,通过画胶区233的胶体可以将第二刚性结构件122和第一刚性结构件121在它们被安装于支持板123上之前彼此连接在一起。进一步地,参见图1和图2,第一刚性结构件121和第二刚性结构件122还可以通过卡接方式连接在一起。具体地,第二刚性结构件122的两侧壁上具有一对突出部124a,突出部124a沿x方向朝第一刚性结构件121突出地设置,对应地,第一刚性结构件121的;两侧壁上设置有一对凹陷部124b,凹陷部124b朝内凹陷以接收突出部124a;通过构造突出部124a和凹陷部124b的形状,可以使它们形成卡接结构124;第二刚性结构件122与第一刚性结构件121通过该卡接结构124实现定位并连接,以提高第二刚性结构件122与第一刚性结构件121之间的定位精度以及连接强度。将理解,第二刚性结构件122与第一刚性结构件121在卡接在一起后,可以通过如胶体进行进一步地固定连接。
将理解,在第二刚性结构件122与第一刚性结构件121彼此连接一起的情况下,支持板123主要起到固定和加强的作用。在其他实施例,可以在将第二刚性结构件122与第一刚性结构件121安装到支持板123的过程中将它们彼此固定连接,支持板123还可以起到定位连接作用。
在一实施例中,如图2所示,支持板123上设置有画胶槽1231和限位结构1232;画胶槽1231可以为贯通结构,画胶槽1231中可以设置胶体等连接介质,该胶体可以用来固定安装第二刚性结构件122和/或第一刚性结构件121;限位结构1232主要对应第一刚性结构件121设置,其用于将第一刚性结构件121限位安装于支持板123上。限位结构1232具体可以包括一对或多对限位孔,相对应地,在第一刚性结构件121的底部可以对应设置包括一对或多对限位柱1212的相应限位结构。在其他实施例中,限位结构1232也可以对应第二刚性结构件122设置(例如,也可以在第二刚性结构件122上设置相应的限位柱)。照明组件111(包括第一刚性结构件121和第二刚性结构件122)整体通过以上实施例的限位结构以限位的方式定位安装于支持板123上。
需要说明的是,以上示例描述的显示芯片1130相对照明组件111定位安装、或者投影镜头13相对投影显示装置11定位安装可以在第一刚性结构件121和第二刚性结构件122整体安装于支持板123上之后进行,从而,通过主动调校显示芯片1130相对例如第一刚性结构件121的定位/主动调校投影镜头13相对例如第一刚性结构件121的定位,已经基本组装好的照明组件111/显示装置11的 内部各器件的安装误差等将在主动调校过程中被考虑到,该误差导致的投影镜头13和显示芯片1130的光轴一致性差的问题将可以得到有效克服。
图7所示为按照本发明又一实施例的投影模组的一光路原理示意图。在该实施例的投影模组中,显示芯片1130可以是DMD芯片,转光元件1112则对应的设置为TIR棱镜。
以下结合图8示例说明本发明一实施例的投影模组10的具体组装方法。
首先,步骤S801,将投影模组10的照明组件111进行组装,尤其是将照明组件111的转光元件1112固定安装于刚性结构件121。
在该步骤中,可以使用第一刚性结构件121、第二刚性结构件122等对照明组件111的光学器件等进行组装。首先,提供组装所需的各个部件,例如第一刚性结构件121、第二刚性结构件122、支持板123、光源、准直镜、转光元件1112等;进一步,将光源及准直镜贴附于第二刚性结构件122的内腔中,将转光元件1112贴附于第一刚性结构件121的内腔中;可选地,还可以将投影镜头13贴附于第一刚性结构件121,其中,可以将投影镜头13设置在转光元件1112的出光位置,例如,在定位安装在第一刚性结构件121的第三开窗127的开窗处。然后,可以将第二刚性结构件122与第一刚性结构件121通过卡接结构124以卡接方式彼此定位并连接在一起,并通过胶体等连接介质固定。
步骤S801进一步可以将固定连接在一起的第一刚性结构件121和第二刚性结构件122整体定位安装在支持板123上,例如,利用限位柱1212以及画胶槽1231中的胶体将第一刚性结构件121和第二刚性结构件122整体定位安装在支持板123上。
需要说明的是,在该步骤S801中采用两个分立的结构件(即第一刚性结构件121和第二刚性结构件122),将光源模块1110和转光元件1112可以分别在设置在两个结构件上,从而照明组件111的相应部件能够分别利用机器视觉技术准确地贴附在相应结构件上,有利于提高照明组件111的组装精度,同时也能提高照明组件111内部的各个光学元件之间的光轴一致性。
进一步,步骤S802,将带有显示芯片1130的显示模块113设置于投影模组10的预设位置,以至于使所述显示模块113与所述刚性结构件121之间留有初始间隙。
需要说明的是,该预设位置可以实现显示模块113相对第一刚性结构件121的粗略定位,该预设位置没有考虑例如步骤S801中产生的组装公差,显示模块113置于该预设位置时,投影模组10产生的投影图像例如容易产生失真。
该预设位置可以位于第一刚性结构件121的外侧;对于多个投影模组10来说,显示模块113的预设位置可以相对第一刚性结构件121统一地确定;可以借助外部设备并控制该外部设备的吸附有显示模块113的部件走位,来将显示模块113置于该预设位置。
进一步,步骤S803,在所述预设位置的基础上,调校显示模块113相对基本已组装好的照明组件111的定位,直到投影模组10的投影镜头13输出的投影图像符合预定要求,于是相应地,所述初始间隙被调整确定为调校后的间隙。
在该步骤S803中,显示芯片1130是预先固定在基板1131上,因此对显示芯片1130的定位的调校可以通过显示模块113相对照明组件111(例如第一刚性结构件121)的定位的调校来实现。
在该步骤S803中,可以利用相应的组装***来不断调试显示模块113相对照明组件111(例如第一刚性结构件121)的定位,直到接收相机91中接收的投影图像符合预定要求。
在一实施例中,组装***可以包括六轴平台,显示模块113通过夹爪或者吸嘴等固定于六轴平台,六轴平台可以主动控制显示模块113相对第一刚性结构件121或转光元件1112的方位,从而方 便实现主动调校。
在调校过程中,使投影模组10通电并投影出特定图案,根据接收相机91接收到的图像信息实时调整显示模块113与照明组件111的相对位置关系,调整的方向可包括六轴调整(例如,x/y/z方向上的平移、绕z/y/z方向的旋转,以垂直于显示芯片1130的中心光线的平面定义为xoy平面),直到接收相机91所接收到的图形符合预定标准,确定此时的显示模块113与照明组件111之间的相对位置。其中,在判断接收相机91接收到的图像是否符合标准时,可以是通过计算机计算得到的图像像差来得到显示芯片1130需要调整的方向、尺度、角度等;也通过接收相机91所接收到的一系列图像的解像力数据可以得出显示芯片1130与转光元件1112(或者投影镜头13)的相对倾斜角度、平移量和距离等参数;进而六轴平台可以基于这些参数调整显示芯片1130与转光元件1112之间的相对位置。
在调校过程中,显示模块113的定位调整可以包括以下动作:
调整显示模块13相对第一刚性结构件121的倾斜角度,直到投影模组10的投影镜头13输出的投影图像的成像清晰度符合相应的预定要求;
将所显示模块113在xoy平面内相对第一刚性结构件121平移,直到投影图像的亮度均匀性符合相应的预定要求,其中,所述xoy平面基于垂直于从照明组件111的转光元件1112射向显示芯片1130的光线的方向(如图1所示);
将显示模块113沿z方向相对第一刚性结构件121平移,直到所述投影图像的虚像距符合相应的预定要求,其中z方向为从所述照明组件111的转光元件1112射向显示芯片1130的光线的方向(如图1所示);
将显示模块113在xoy平面上相对第一刚性结构件121旋转,直到投影图像能够以基本水平或基本垂直的方位进入例如人眼或接收相机91。
将理解,由于转光元件1112已经固定置于第一刚性结构件121中,调校显示模块113/显示芯片1130相对第一刚性结构件121的定位也表示调校显示模块113/显示芯片1130相对转光元件1112的定位。
在该步骤S803中,借助例如六轴平台可以从第一刚性结构件121外侧调校带有显示芯片1130的显示模块113相对第一刚性结构件121的定位,有利于方便调校并获得准确的定位结果,也方便在定位被调校完成后进行固定安装;从而有利于获得更好的光轴一致性、提高投影图像的质量。
在步骤S803中,可以以主动方式校准好显示芯片1130相对基本已组装好的照明组件111的定位,或还可以利用机器视觉技术调整好显示芯片1130相对基本已组装好的照明组件111的定位。
通过步骤S803的调教过程,显示模块113相对第一刚性结构件121进一步地精确定位,也即显示芯片1130相对第一刚性结构件121上固定的转光元件1112、投影镜头13等进一步地精确定位,克服了照明组件111的组装误差、元件自身公差等导致的问题,可以使显示芯片1130、转光元件1112、投影镜头13之间的光轴一致性好。
进一步,步骤S804,在调校好的定位下将显示模块113相对照明组件111进行固定。
将理解,步骤S803所调校好的定位可以被确定或记录,调校好的定位具体可以表示,在该定位条件下,投影图像的成像清晰度符合相应的预定要求、投影图像的亮度均匀性符合相应的预定要求、投影图像的虚像距符合相应的预定要求、和投影图像能够以基本水平或基本垂直的方位进入人眼。在调校好的定位下,显示模块113与第一刚性结构件121之间的调校后的间隙被确定下来。
在该步骤S804中,可以通过胶体等连接介质将显示芯片1130所贴附的基板1131相对第一刚性 结构件121进行固定,胶体置于显示模块113与第一刚性结构件121之间的间隙中,例如,在台阶1212上涂胶并固化,密封第一开窗124。
以上实施例的组装方法在组装完成后可以形成本发明一实施例的投影模组10,通过步骤S803的主动调校过程,可以克服步骤S801的组装过程中已经产生的组装误差或者照明组件元件的自身公差,使显示芯片1130、转光元件1112和投影镜头13之间的光轴基本一致,大大提高投影图像的质量。
以下结合图9示例说明本发明又一实施例的投影模组10的具体组装方法。
首先,步骤S901,将投影模组10的投影显示装置11进行组装。
需要说明的是,该步骤S901类似于图8中所示实施例的步骤S801;但是,相对于步骤S801,该步骤S901还将显示模块113基于例如步骤S802的预设位置固定安装在第一刚性结构件121的第一开窗124的开窗处,这种固定安装难以达到以上步骤S803中的精确定位。
具体地,步骤S901包括:将照明组件111的转光元件1112和光源模块1110分别固定安装在第一刚性结构件121和第二刚性结构件122的内部;将第一刚性结构件121和第二刚性结构件122通过卡接方式进行彼此定位并连接;将第一刚性结构件121和第二刚性结构件122固定安装在支持板123上;将显示芯片1130固定安装在第一刚性结构件121上。
步骤S902,将投影模组10的投影镜头13设置于所述投影模组10的预设位置。需要说明的是,该预设位置可以实现投影模组10相对第一刚性结构件121的粗略定位,该预设位置没有考虑例如步骤S901中产生的组装公差,投影镜头13置于该预设位置时,投影模组10产生的投影图像例如容易产生失真。
步骤S903,调校投影模组10的投影镜头13相对基本已组装好的投影显示装置11的定位,直到投影模组10的投影镜头13输出的投影图像符合预定要求。
需要说明的是,该步骤S903所使用的调校原理以及组装***可以分别类似于图8中所示实施例的步骤S803中针对显示模块113的调校原理和组装***,只是调校过程的位置可动元件由显示模块113变换为投影镜头13。
在调校投影镜头13的定位的过程中,投影镜头13的定位调整可以包括以下动作:
调整投影镜头13相对第一刚性结构件121的倾斜角度,直到投影镜头13输出的投影图像的成像清晰度符合相应的预定要求;
将投影镜头13在xoy平面内相对第一刚性结构件121平移,直到投影图像的亮度均匀性符合相应的预定要求;以及
将投影镜头13沿z方向相对所述第一刚性结构件121平移,直到投影图像的虚像距符合相应的预定要求。
相应地,在投影模组10的投影镜头13输出的投影图像符合预定要求的情况下,投影镜头13和显示芯片1130之间的光轴被确定为基本一致;投影图像符合预定要求包括:投影图像的成像清晰度符合相应的预定要求、所述投影图像的亮度均匀性符合相应的预定要求、和投影图像的虚像距符合相应的预定要求。
将理解,由于转光元件1112和显示芯片1130已经固定置于第一刚性结构件121中,调校投影镜头13相对第一刚性结构件121的定位也表示调校投影镜头13相对转光元件1112和显示芯片1130的定位。
步骤S904,在调校好的定位下将投影镜头13相对已经基本组装好的投影显示装置11进行固定 地安装。将理解,步骤S903所调校好的定位可以被确定或记录,调校好的定位具体可以表示,在该定位条件下,投影图像的成像清晰度符合相应的预定要求、投影图像的亮度均匀性符合相应的预定要求、和投影图像的虚像距符合相应的预定要求。在该调校好的定位下,投影镜头13与第一刚性结构件121之间的间隙被确定下来。
具体地,通过胶体等连接介质将投影镜头13相对第一刚性结构件121进行固定,胶体置于投影镜头13与第一刚性结构件121之间的间隙中。
以上实施例的组装方法在组装完成后可以获得如图1所示实施例的投影模组10,通过步骤S903的主动调校,可以克服步骤S901的组装过程中已经产生的组装误差,使显示芯片1130、转光元件1112和投影镜头13之间的光轴基本一致,光轴一致性得到提高,有利于提高了投影图像的质量。
申请人注意到,投影模组所投影的图像质量直接决定着人眼从近眼显示设备所接收的图像质量,而近眼显示设备的波导片对图像进行二维扩瞳也对接收光线有角度要求,即波导片的入射光线需在一个角度范围内,才能使得光线在波导片内传输和扩展;因此,投影模组所发出的各个视场的不同角度的光线都要满足相应的角度要求,投影模组和波导片之间的相对位置关系(例如角度及距离)也存在相应的精度要求。
以下进一步示例说明本发明实施例的近眼显示设备及其组装方法。为方便理解和说明,基于近眼显示设备的方位定义了X方向、Y方向和Z方向,其中,Y方向为大致水平的方向,其平行于人眼的双眼所在的方向,Z方向对应于近眼显示设备的高度方向,X方向基本垂直于YOZ平面,基本平行于波导片的耦出方向,其中X方向正方向与波导片的耦出方向相反。
参见图10至图13,其中示出了一实施例的近眼显示设备200。近眼显示设备200主要地包括投影模组10、波导片230以及支架210。投影模组10可以使用以上任一实施例的投影模组,其投射出的投影图像失真小、质量好。支架210用于承载并安装定位投影模组10和波导片230;波导片230和投影模组10被定位安装在支架210上,以至于使投影模组10投射出的光线中心大致落在波导片230的耦入区232的中心。
如图10和图11所示,在一实施例中,对应双眼设置的左右两侧的两个投影模组10可以沿X方向固定安装在支架210上,这样,每个投影模组10基本垂直对准波导片230的耦入区232地定位安装在支架210上;具体地,每个投影模组10与支架210之间的组装过程中,可以首先通过限位结构确定位置,然后用画胶并曝光的方式固定二者的相对位置,从而实现每个投影模组10固定安装在支架210上,例如固定安装支架210的支持板213上。需要说明的是,支持板213可以替代投影模组10的支持板123(参见图1),或者可以与投影模组10的支持板123一体地设置。
如图13所示,波导片230上具有耦入区232、耦出区231和画胶区233;耦入区232用来接收投影模组10投射出的光线,使其在波导片中进行传输和二维扩瞳,最终图像光线在耦出区231实现出射并被人眼所观察;波导片230上预留的画胶区233不进行光栅刻制。
将理解,耦入区232在波导片230上的具***置可以根据投影模组10在支架210上的安装方位来设置,从而方便投影模组10的投影图像进入耦入区232。
入射光线在耦入区232耦入时,光线与波导片230表面的角度会影响波导片的传输效率,不合适的耦入角度还会引起最终观察到的图像的失真;因此,对波导片230进行实时主动调校可以获得最佳图像质量。值得注意的是,由于波导片230上的光栅刻制总是存在误差,对波导片230主动调校还可弥补这部分误差对输出图像带来的影响。另外,通过主动调校波导片230相对投影模组10的位置,使得投影模组10的光线中心正好落在波导片耦入区232域的中心,保证了投影图像的不失真, 并且减少了光能损失。
继续参见图10和图11所示,两个投影模组10大致位于波导片230的耦出侧(即对应人眼所在的一侧),这样,投影模组10可以从耦出侧向波导片230的耦入区232投射投影图像。在其他实施例中,投影模组10也可以大致位于波导片230的耦出侧的相对侧,这样,投影模组10可以从耦出侧的相对侧向波导片230的耦入区232投射投影图像。
在一实施例中,支架210上开有接收结构220,例如,分别对应两片波导片230设置的左右两个接收结构220;接收结构220至少部分地接收波导片230;在波导片230相对支架210的定位被调校好的情况下,可以通过接收结构220中的胶体221将波导片230定位安装在支架210上,以至于使投影模组10的投射出的光线中心大致落在波导片230的耦入区232的中心。
需要说明的是,接收结构220中的胶体221可以对应波导片230的画胶区233双侧地布置(参见图12),每一侧的胶体221位于波导片230与接收结构220的内壁之间;在又一实施例中,胶体221可以相对波导片230的画胶区233单侧地布置(参见图21),单侧地布置的胶体221位于波导片230与接收结构220的内壁之间。将理解,双侧地布置胶体221(即双面画胶)可以有效平衡胶体固化产生的变形对波导片230产生的作用。
为方便注胶,在支架210的对应接收结构220和波导片230的画胶区233位置设置有多个注胶孔211,在画胶时,可以从多个注胶孔211注入胶体至接收结构220中并与画胶区233接触,然后进行曝光、固化胶体。在双侧地布置胶体221的情形下,支架210的主支架210b(其位于波导片230的耦出侧)和副支架210a(其位于波导片230的耦出侧的相对侧)上可以分别对应设置前注胶孔211b和后注胶孔211a。
可选地,接收结构220的内壁上设置有突起(图中未示出),突起朝向波导片230凸出,其形状可以但不限于是锯齿状、矩形、三角形等;突起可以用于增大胶体221与接收结构220的内壁接触的表面积,从而提高粘接力。
可选地,接收结构220的内壁上设置有溢胶槽212(参见图12),溢胶槽212可以用来容纳多余的胶体,支架的边缘还可以具有一防溢胶结构;溢胶槽212具体可以设置在接收结构220的内壁拐角处。支架210的边缘还可以进一步设置防溢胶结构,以防止固化之前的胶体溢出并且污染波导片230的光学区域。
参见图12,接收结构220可以是通过主支架210b和副支架210a包围形成的空腔结构,每片波导片230被定位安装在主支架210b和副支架210a之间的一个接收结构220中;接收结构220在x方向的宽度大于波导片230的厚度,例如,可以通过设置接收结构220的宽度大小,使其在接收并固定波导片230时,波导片230与接收结构220的内壁之间的单侧间隙223在大于等于0.25mm且小于等于1mm的范围内(例如,0.5mm、0.8mm等);这样,在波导片230被固定于接收结构220之前,波导片230在接收结构220中的定位可以被在线调校,也就是说,接收结构220为调校波导片230相对支架210的定位提供了调整所需的冗余空间。
可选地,支架210可以为分体式支架,其中,主支架210b和副支架210a可拆卸地固定连接在一起并形成接收结构220,示例地,主支架210b和副支架210a可以通过螺钉固定连接在一起。在其他实施例中,主支架210b和副支架210a可以通过胶水等粘结在一起并形成接收结构220。当然,在其他实施例中,支架210也可以为一体式的支架。
在投影模组10定位安装在支持板213上且需要对显示芯片1130或者投影镜头13进行主动调校的情形下(即在主支架210b上进行主动调校的情形),考虑到接收相机91的接收投影模组10的投 影图像的要求,在主动调校显示芯片1130或者投影镜头13之前,副支架210a未安装在主支架210b上,从而避免副支架210a挡住投影模组10在其光线出射的延伸方向、方便利用接收相机91进行主动调校。在主支架210b上主动调校显示芯片1130或者投影镜头13之后,可以再通过螺钉或胶水等将副支架210a固定在主支架210b上。
在其他实施例中,可以将副支架210a以避开波导片230的耦入区232的定位方式相对主支架210b固定设置(图中未示出),这样,副支架210a基本也不会挡住投影模组10在其光线出射的延伸方向,方便投影模组10在主支架210b上进行主动调校。
需要说明的是,波导片230相对投影模组10的定位可以在其被胶体221固化前主动地调校确定。波导片230相对投影模组10的定位将在以下图23示例的组装方法中进行说明。
图14至图18示出了本发明第二实施例的近眼显示设备300以及其使用的波导片230。第二实施例的近眼显示设备300相比于第一实施例的近眼显示设备200,其主要区别在于,投影模组10基本平行波导片230的耦入区232地定位安装在所述支架210上,在投影模组10与波导片230的耦入区232之间设置有折射棱镜340,折射棱镜340相对支架230定位安装以至于使投影模组10投射出的光线中心在经由棱镜340折射后落在波导片230的耦入区232的中心。
具体地,参见图14至图18,左右两侧的投影模组10沿Y轴相对地布置,每个投影模组10投射出的光线经一个折射棱镜340折射进入波导片230的耦入区232,投影模组10和支架210可以通过支持板213上的台阶承靠面、限位孔1232等限位结构进行预连接,然后在画胶槽1231中画胶并曝光,固定二者相对位置(参见图17)。折射棱镜340和支架210可以通过限位柱341等限位结构进行预连接,然后在画胶槽342中画胶并曝光,固定二者相对位置(参见图17)。
图19至图21示出本发明第三实施例的近眼显示设备400。第三实施例的近眼显示设备400相比于第一实施例的近眼显示设备200,其主要区别在于,支架210不包括位于波导片230的外侧的支架,也即省去了如图11中示出的副支架210a;接收结构220可以是通过一体式支架210形成的半开放式的空腔结构;胶体221可以相对波导片230的画胶区233单侧地布置(参见图21),单侧地布置的胶体221位于波导片230与接收结构220的内壁之间。
图22是按照本发明第四实施例的近眼显示设备的结构示意图。第四实施例的近眼显示设备500相比于第一实施例的近眼显示设备200,其主要区别在于,支架210在对应波导片230的耦入区232的位置开有避让口213,避让口213用于避让所述投影模组10)投射出的光线。这样,副支架210a基本也不会挡住投影模组10在其光线出射的延伸方向,方便投影模组10在支架210上进行主动调校。避让口213具体可以设置在副支架210a的左右两侧。
以下结合第一实施例的近眼显示设备200和图23示例说明本发明一实施例的近眼显示设备的组装方法。
首先,步骤S2301,将投影模组10定位安装在支架210上;
步骤S2302,调校波导片230相对支架210的定位,直到使投影模组10投射出的光线中心落在波导片230的耦入区232的中心。
具体地,先将波导片230***支架210的接收结构220中,波导片230与支架210之间存在间隙,该间歇可以用来对波导片230进行微调,单边间隙值为0.25mm-1mm,例如,0.55mm;需要说明的是,该间隙过小则会导致预留的调整空间不足,引起波导片230和支架210之间产生干涉,间隙过大则会导致胶体过多,导致胶体不易固化、胶体固化时的收缩量较大等问题,容易引起可靠性下降。
由于入射光线耦入时与波导片230表面的角度会影响波导片230的传输效率,不合适的耦入角度还会引起最终观察到的图像的失真,所以进一步对波导片230进行实时主动校准以获得较佳图像质量。将理解,由于波导片230的光栅刻制容易存在误差,对波导片230的主动校准还可弥补这部分误差对输出图像带来的影响。另外,通过主动校准波导片230与投影模组10的相对位置,使得投影模组的光线中心正好落在波导片耦入区232域的中心,保证了投影图像的不失真,并且减少了光能损失。
在主动校准过程中,投影模组10投射出特定图像可以在人眼侧设置的接收装置(例如接收相机91)被接收,波导片230可借助外部定位***实时地在X轴、Y轴、Z轴、XOY平面、YOX平面、XOZ平面六个自由度方向上进行主动调整,通过对接收到的图像的识别可以判断出波导片230的最佳安装位置。
在一实施例中,接收装置与波导片230的距离可以模拟人眼与波导片230的距离,例如为1cm-2cm,投影模组10可以投射出例如十字线图像等预定图像,接收装置通过判断接收到的十字线的位置对波导片进行XOZ平面和YOX平面上的调整,具体地,可以在接收装置的相机镜头上设置标准十字图案,通过判断接收装置接收到的投影模组10所投射的十字线与标准十字图案之间的位置关系来判断波导片230需要调整的方向和/或大小;通过图像的明暗测试,对波导片进行X轴、Y轴、X轴的位置调整,保证亮度的均匀性。将理解,本方法中使用的十字图案只是一个示例性的图案,例如十字图案可以换成点阵等其他图案;除了使用软件进行自动进行主动校准外,使用较为直观的十字图案还方便手动进行校准,在调整范围超出软件设定上限时还可以通过人工手动进行主动校准,减少产品的不良率。
可选地,支架210上可以设置有标记点,其用于通过机器视觉技术将波导片230相对支架210直接地定位安装;例如,在主动校准过程中,还可以通过对标记点的识别在YOZ平面上对波导片230进行位置调整,进一步地,也可以直接使用标记点的识别对波导片230和投影模组10的相对位置进行对位。
需要说明的是,以上示例的波导片230的主动调校过程可以对每片波导片230重复使用,虽然波导片230可能获得不同的定位结果。
步骤S2303,在调校好的定位下将波导片230相对支架210进行固定。
在调校好的定位下,确定波导片230的位置被确定,通过支架210上的两侧注胶孔211分别向波导片230的画胶区233注胶,并通过该注胶孔211进行曝光、固化胶体211,从而波导片230相对支架210进行固定。
以上示例的组装方法可以采用主动校准的方式在五个自由度方向上调整波导片230与投影模组10的相对位置,通过实时对接收装置接收到的投影模组10输出的经过波导片230作用后的图像进行识别,可以精确确定波导片230与投影模组10的相对位置;并且,可以用涂胶曝光的方式进行固定,采用的机械结构件少,近眼显示设备的组装公差低、组装工艺更简单。作为结果,以上示例的组装方法获得近眼显示设备且能提供高成像质量的图像。
虽然本发明是结合一个或多个实施来说明的,但是在不背离所附权利要求的精神或范围的前提下可以对说明的示例进行替换和/或修改。此外,虽然本发明的具体特征是结合若干实施/实施例的仅其中之一来公开的,但是如针对任何给定或具体功能为所期望和有利的,可以将此特征与其他实施/实施例的一个或多个其他特征进行组合。
Claims (23)
- 一种投影模组(10),其包括投影显示装置(11)和投影镜头(13),所述投影显示装置(11)包括照明组件(111)和带有显示芯片(1130)的显示模块(113),其特征在于,还包括刚性结构件(121),所述照明组件(111)的转光元件(1112)固定安装于所述刚性结构件(121),所述显示模块(113)与所述刚性结构件(121)之间具有间隙。
- 如权利要求1所述的投影模组(10),其特征在于,所述间隙中设置有连接介质,所述连接介质将所述显示模块(113)固定于所述刚性结构件(121)上。
- 如权利要求1或2所述的投影模组(10),其特征在于,所述刚性结构件(121)的一侧开有第一开窗(124),所述显示模块(113)固定于对应所述第一开窗(124)的开窗处,并且,所述显示模块(113)与所述转光元件(1112)分别位于所述第一开窗(124)的两侧。
- 如权利要求1到3中任一项所述的投影模组(10),其特征在于,所述间隙在大于等于0.05mm且小于等于1mm的范围内,或者进一步地在大于等于0.1mm且小于等于0.6mm的范围内。
- 如权利要求1到4中任一项所述的投影模组(10),其特征在于,所述间隙被构造为:确定所述显示芯片(1130)相对所述照明组件(111)的定位,以至于在该确定的定位下所述投影镜头(13)输出的图像投影图像符合预定要求。
- 如权利要求5所述的投影模组,其特征在于,所述投影图像符合预定要求包括:所述投影图像的成像清晰度符合相应的预定要求、所述投影图像的亮度均匀性符合相应的预定要求、和所述投影图像的虚像符合相应的预定要求;或者还包括:所述投影图像能够以基本水平或基本垂直的方位进入人眼。
- 如权利要求2到6中任一项所述的投影模组(10),其特征在于,所述显示模块(113)通过所述间隙中的固化的连接介质固定于所述刚性结构件(121)上,以至于所述显示芯片(1130)基于所述确定的定位被固定在所述投影模组(10)中。
- 如权利要求1到7中任一项所述的投影模组(10),其特征在于,所述照明组件(111)包括光源模块(1110);其中,所述转光元件(1112)用于将所述光源模块(1110)发出的光线至少部分地转折到所述显示芯片(1130)、和/或将所述显示芯片(1130)返回的光线至少部分地转折到所述投影模组(10)的投影镜头(13)。
- 如权利要求3到8中任一项所述的投影模组(10),其特征在于,所述第一开窗(124)被构造为使所述显示模块(113)能够从所述刚性结构件(121)的外侧定位安装在对应所述第一开窗(124)的开窗处。
- 如权利要求3到9中任一项所述的投影模组(10),其特征在于,所述显示模块(113)包括用于贴附所述显示芯片(1130)的基板(1131);其中,在所述基板(1131)的边沿部分和对应所述第一开窗(124)的用于支撑定位所述基板(1131)的台阶(1212)之间,设置用于将所述显示模块(113)固定于所述刚性结构件(121)上的连接介 质。
- 如权利要求2到10中任一项所述的投影模组(10),其特征在于,所述连接介质被构造为能够密封所述间隙。
- 如权利要求2到11中任一项所述的投影模组,其特征在于,所述连接介质具有厚度不均匀的厚度布置,以至于使所述显示模块(113)相对所述刚性结构件(121)倾斜定位。
- 如权利要求1到12中任一项所述的投影模组(10),其特征在于,所述投影模组(10)还包括支持板(123);其中,所述支持板(123)上设置有画胶槽(1231)和限位结构(1232),所述画胶槽(1231)中设置有用于固定安装所述刚性结构件(121)的连接介质,所述限位结构(1232)对应所述刚性结构件(121)设置并用于将所述刚性结构件(121)限位安装于所述支持板(123)上。
- 如权利要求3到13中任一项所述的投影模组(10),其特征在于,所述刚性结构件(121)的外壁上还设置有朝向所述光源模块(1110)的第二开窗(126)和朝向所述投影镜头(13)的第三开窗(127);其中,所述投影镜头(13)定位安装在所述第三开窗(127)上,以至于所述投影镜头(13)相对所述投影显示装置(11)定位安装。
- 如权利要求14所述的投影模组(10),其特征在于,在所述投影镜头(13)相对所述刚性结构件(121)的定位被调校好的情况下通过期望的厚度布置和/或形状的连接介质将所述投影镜头(13)定位安装在所述第三开窗(127)上。
- 一种近眼显示设备(200),其特征在于,包括:波导片(230)、如权利要求1至15中任一项所述的投影模组(10)以及支架(210);其中,所述波导片(230)和所述投影模组(10)被定位安装在所述支架(210)上以至于使所述投影模组(10)投射出的光线中心落在所述波导片(230)的耦入区(232)的中心。
- 一种投影模组的组装方法,其特征在于,包括步骤:将所述投影模组(10)的照明组件(111)进行组装,其中将所述照明组件(111)的转光元件(1112)固定安装于刚性结构件(121);将带有显示芯片(1130)的显示模块(113)设置于所述投影模组(10)的预设位置,以至于使所述显示模块(113)与所述刚性结构件(121)之间留有初始间隙;在所述预设位置的基础上,调校所述显示模块(113)相对所述照明组件(111)的定位,直到所述投影模组(10)的投影镜头(13)输出的投影图像符合预定要求,相应地,所述初始间隙被调整确定为调校后的间隙;以及在调校好的定位下将所述显示模块(113)相对所述照明组件(111)进行固定。
- 如权利要求17所述的组装方法,其特征在于,在所述调校步骤中,以主动方式校准好所述 显示芯片(1130)相对已组装好的所述照明组件(111)的定位,或利用机器视觉技术调整好所述显示芯片(1130)相对已组装好的照明组件(111)的定位。
- 如权利要求17或18所述的组装方法,其特征在于,所述投影图像符合预定要求包括:所述投影图像的成像清晰度符合相应的预定要求、所述投影图像的亮度均匀性符合相应的预定要求、和所述投影图像的虚像距符合相应的预定要求;或者还包括:所述投影图像能够以基本水平或基本垂直的方位进入人眼。
- 如权利要求17到19中任一项所述的组装方法,其特征在于,所述预设位置位于所述刚性结构件(121)的外侧;在所述调校步骤中,从所述刚性结构件(121)的外侧调校带有所述显示芯片(1130)的显示模块(113)相对所述刚性结构件(121)的定位,从而调校好所述显示芯片(1130)相对所述照明组件(111)的定位。
- 如权利要求17到20中任一项所述的组装方法,其特征在于,所述调校包括以下一项或多项:调整所述显示模块(113)相对所述刚性结构件(121)的倾斜角度,直到所述投影模组(10)的投影镜头(13)输出的投影图像的成像清晰度符合相应的预定要求;将所述显示模块(113)在xoy平面内相对所述刚性结构件(121)平移,直到所述投影图像的亮度均匀性符合相应的预定要求,其中,所述xoy平面基于垂直于从所述照明组件(111)的转光元件(1112)射向所述显示芯片(1130)的光线的方向;将所述显示模块(113)沿z方向相对所述刚性结构件(121)平移,直到所述投影图像的虚像距符合相应的预定要求,其中所述z方向为从所述照明组件(111)的转光元件(1112)射向所述显示芯片(1130)的光线的方向;将所述显示模块(113)在所述xoy平面上相对所述刚性结构件(121)旋转,直到所述投影图像能够以基本水平或基本垂直的方位进入人眼。
- 如权利要求17到21中任一项所述的组装方法,其特征在于,在固定步骤中,通过连接介质将所述显示芯片(1130)所贴附的基板(1131)相对所述照明组件(111)的固定安装有转光元件(1112)的刚性结构件(121)进行固定。
- 如权利要求17到22中任一项所述的组装方法,其特征在于,所述调校步骤中,通过调校所述显示芯片(1130)相对已组装好的所述照明组件(111)的定位,来调整确定所述显示模块(113)与所述刚性结构件(121)之间的初始间隙以获得所述调校后的间隙;其中,所述连接介质置于所述调校后的间隙。
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