CN115202067B - Backlight display system and display device - Google Patents
Backlight display system and display device Download PDFInfo
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- CN115202067B CN115202067B CN202210911968.4A CN202210911968A CN115202067B CN 115202067 B CN115202067 B CN 115202067B CN 202210911968 A CN202210911968 A CN 202210911968A CN 115202067 B CN115202067 B CN 115202067B
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- 239000011324 bead Substances 0.000 claims description 31
- 230000003287 optical effect Effects 0.000 claims description 27
- 239000004973 liquid crystal related substance Substances 0.000 claims description 19
- 239000000758 substrate Substances 0.000 claims description 18
- 238000003491 array Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
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- 230000008569 process Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/33—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving directional light or back-light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/27—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving lenticular arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B30/00—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
- G02B30/20—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes
- G02B30/26—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type
- G02B30/30—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers
- G02B30/31—Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images by providing first and second parallax images to an observer's left and right eyes of the autostereoscopic type involving parallax barriers involving active parallax barriers
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Abstract
The application relates to a backlight display system and a display device, wherein the system comprises a collimation device and a light splitting device; the collimating device provides collimated light beams to the beam splitting device; the beam splitting device adjusts the emergence angle of the collimated light beam according to the period; the cycle includes a first period of time and a second period of time; in a first period of time, the beam splitting device adjusts the collimated light beam to be emitted according to a first emission angle; and in the second period of time, the beam splitting device adjusts the collimated light beam to be emitted at a second emission angle. The emergent collimated light beam passes through the 3D panel to form a corresponding stereoscopic viewing angle. The first picture and the second picture are spliced to form a stereoscopic display picture with a larger visual angle, visual angle splicing is achieved, and therefore stereoscopic viewing angles are improved.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a backlight display system and a display device.
Background
With the continuous development of display technology, the display technology is updated and iterated continuously, and the three-dimensional display technology has evolved from the planar display technology. In the flat panel display technology, the backlight system is a common light source, the light distribution of the backlight system is in a fixed state, and the light type of the backlight system is similar to the traditional lambertian distribution. However, in the stereoscopic display technology, a dynamically changing light distribution is required, and the light distribution is switched at different times. It is desirable to expand stereoscopic viewing angles in stereoscopic display technology.
Disclosure of Invention
Based on this, it is necessary to provide a backlight display system and a display device for the problem of how to enlarge the stereoscopic viewing angle of stereoscopic display.
In order to achieve the above object, in one aspect, an embodiment of the present application provides a backlight display system, including a collimation device and a beam splitting device; the collimating device provides collimated light beams to the beam splitting device;
the beam splitting device adjusts the emergence angle of the collimated light beam according to the period; the cycle includes a first period of time and a second period of time;
in a first period of time, the beam splitting device adjusts the collimated light beam to be emitted according to a first emission angle; and in the second period of time, the beam splitting device adjusts the collimated light beam to be emitted at a second emission angle.
In one embodiment, the collimating means comprises a light source and a light collimating structure;
the light source emits light to the light collimating structure; the light collimation structure converts light emitted by the light source into a collimated light beam.
In one embodiment, the light source comprises a plurality of light beads;
the light collimation structure comprises a transparent substrate and a plurality of micro lenses; the micro lens array is arranged on the transparent substrate, and the micro lenses are arranged in one-to-one correspondence with the lamp beads.
In one embodiment, the light source further comprises a plurality of light receiving members; the light receiving part is provided with an accommodating space; the lamp beads are arranged in the accommodating space in a one-to-one correspondence manner;
in one embodiment, the concentricity of the luminous light center of the lamp bead and the optical axis of the micro lens is between-0.1 DEG and +0.1 deg.
In one embodiment, the micro lens is arranged on one end face of the transparent substrate close to the light splitting device; alternatively, the micro lens is disposed on the other end surface of the transparent substrate facing away from the spectroscopic device.
In one embodiment, the microlenses are cylindrical lenses or two-dimensional lenses.
In one embodiment, the divergence angle of the collimated light beam is 10 ° or less.
In one embodiment, the light splitting device comprises a grating and a reverse prism film;
the grating comprises a plurality of channel units; the inverse prism film comprises a plurality of inverse prisms; the channel units are arranged in one-to-one correspondence with the inverse prisms;
the channel unit comprises at least two optical channels; in a first period of time, a part of light channels of each channel unit are conducted to allow the collimated light beams to pass, and the other part of light channels are closed to block the collimated light beams to pass so that the collimated light beams passing through the gratings irradiate on the first side wall of each inverse prism; each first side wall is positioned on the same side;
in the second period of time, one part of the light channels of each channel unit are closed to block the collimated light beams from passing through, and the other part of the light channels are conducted to allow the collimated light beams passing through the gratings to irradiate on the second side wall of each inverse prism; the second side walls are positioned on the same side.
In one embodiment, the grating is a liquid crystal slit grating;
inputting a first voltage to the liquid crystal slit grating in a first period of time, wherein one part of light channels of each channel unit are conducted to allow the collimated light beams to pass through, and the other part of light channels are closed to block the collimated light beams from passing through so that the collimated light beams passing through the grating irradiate on the first side wall of each inverse prism;
and in a second period of time, inputting a second voltage to the liquid crystal slit grating, wherein one part of light channels of each channel unit are closed to block the collimated light beams from passing, and the other part of light channels are conducted to allow the collimated light beams to pass, so that the collimated light beams passing through the grating irradiate on the second side wall of each inverse prism.
In one embodiment, the inverse prism axis is located between two immediately adjacent light channels; during the first period and the second period, one of the two immediately adjacent light channels is on, and the other is off.
On the other hand, the application also provides a display device which comprises a controller and the backlight display system; the controller controls the backlight display system.
One of the above technical solutions has the following advantages and beneficial effects:
the backlight display system provided by the embodiments of the application comprises a collimation device and a light splitting device. Wherein the collimating means provides a collimated beam to the beam splitting means. The beam splitting device adjusts the emergence angle of the collimated light beam according to the period. During operation of the backlight display system, each cycle includes a first period of time and a second period of time. The beam splitting device adjusts the collimated light beam to be emitted at a first emission angle in a first period of time. And in the second period of time, the beam splitting device adjusts the collimated light beam to be emitted at a second emission angle. The first picture and the second picture are spliced to form a stereoscopic display picture with a larger visual angle, visual angle splicing is achieved, and therefore stereoscopic viewing angles are improved.
Drawings
Fig. 1 is a schematic structural diagram of a backlight display system according to an embodiment of the present application.
Fig. 2 is a schematic view of an exit angle of a collimated light beam according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a collimation device of a backlight display system according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of a collimation device and a spectroscopic device of a backlight display system according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a collimation device and a spectroscopic device of a backlight display system according to an embodiment of the present application.
Fig. 6 is a top view of a light receiving member according to an embodiment of the present disclosure.
Fig. 7 is another top view of a light receiving element according to an embodiment of the present disclosure.
Fig. 8 is a schematic light transmission diagram of a channel unit of a grating according to an embodiment of the present application.
Fig. 9 is a schematic structural diagram of a channel unit of a grating according to an embodiment of the present application.
Fig. 10 is a schematic light transmission diagram of a liquid crystal slit grating according to an embodiment of the present disclosure in a first period of time.
Fig. 11 is a schematic diagram illustrating light transmission of a liquid crystal slit grating in a second period of time according to an embodiment of the present disclosure.
Reference numerals:
11. a collimation device; 111. collimating the light beam; 113. a light source; 1131. a lamp bead; 1133. a light receiving member; 115. a light collimation structure; 1151. a transparent substrate; 1153. a microlens; 13. a spectroscopic device; 131. a grating; 1311. a channel unit; 133. an inverse prism film; 1331. inverse prism.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The size of the stereoscopic viewing angle has now become an important parameter in view of the performance of display technology. Users are continually seeking larger stereoscopic viewing angles to enhance the viewing experience. In the technical field of stereoscopic display, users also need larger stereoscopic viewing angles, and in order to achieve the above purpose, the application provides a backlight display system. As shown in fig. 1, the backlight display system of the present application includes a collimating device 11 and a light splitting device 13. Wherein the collimating means 11 is arranged to convert normally divergent light rays, e.g. light rays distributed in lambertian, into a collimated light beam 111, whereby the collimating means 11 provides the collimated light beam 111 to the beam splitting means 13. The collimated light beam 111 is a light beam having no significant change in divergence angle after traveling a certain distance, and the light beam radius does not occur after traveling a certain distance. In order to ensure the quality of the collimated light beam 111 obtained by the beam splitting means 13, a better beam splitting effect is achieved by the beam splitting means 13. In one example, the divergence angle of the collimated light beam 111 is 10 ° or less, for example, the divergence angle of the collimated light beam 111 is 9 ° or less, the divergence angle of the collimated light beam 111 is 5 ° or less, the divergence angle of the collimated light beam 111 is 3 ° or less, and the divergence angle of the collimated light beam 111 is 1 ° or less, of course, the smaller the divergence angle of the collimated light beam 111, the better the spectroscopic effect of the spectroscopic device 13 is improved.
The beam splitting device 13 receives the collimated light beam 111 emitted by the collimating device 11, and is configured to adjust an exit angle of the collimated light beam 111. Note that, the exit angle is an angle with respect to the spectroscopic device 13, and in one example, as shown in fig. 2, the exit angle is an angle between the collimated light beam 111 and a normal line of the exit end of the spectroscopic device 13. Of course, a coordinate system may be set for the spectroscopic device 13, and the exit angle may be measured based on the coordinate system.
The beam splitting means 13 adjusts the exit angle of the collimated light beam 111 in a period of 60 hz or more in order to avoid the human eye from perceiving a change in the exit angle. A cycle is divided into two time periods, i.e. the cycle comprises a first period and a second period. In a first period of time, the light splitting device 13 adjusts the collimated light beam 111 to emit at a first emission angle (as shown in fig. 1 and 3), and a first stereoscopic viewing angle corresponding to the first emission angle is shown in fig. 1 and 3. In a second period of time, the beam splitting device 13 adjusts the collimated light beam 111 to emit at a second emission angle (as shown in fig. 1 and 3), and a second stereoscopic viewing angle corresponding to the second emission angle is shown in fig. 1 and 3. That is, the collimated light beams 111 are sequentially circularly emitted at the first emission angle and at the second emission angle, or sequentially emitted at the second emission angle and at the first emission angle. The collimated light beam 111 emitted according to the first emission angle encloses a spatial range, and the collimated light beam 111 emitted according to the second emission angle encloses a spatial range, so that the two light beams can be spliced without overlapping or gaps, and a large viewing angle (shown in fig. 1 and 3) is realized. It should be noted that, after the collimated light beam emitted from the beam splitting device passes through a 3D (three-dimensional) panel, a stereoscopic viewing angle (as shown in fig. 1 and 3) can be formed.
The implementation of the collimating means 11 and the splitting means 13 is described in detail below.
The collimating means 11 as means for providing a collimated light beam 111 can be implemented in a wide variety of ways, several possible ways being provided below. In one example, as shown in fig. 3, the collimation device 11 includes a light source 113 and a light collimation structure 115. Wherein the light source 113 is configured to emit light towards the light collimating structure 115. In one example, the light source 113 is an entire LED (Light Emitting Diode ) light source 113, an entire MiniLED (Mini Light Emitting Diode ) light source 113, or an entire micro LED (Micro Light Emitting Diode, mini light emitting diode) light source 113, and other types of light sources 113 are also possible, without limitation. The micro-scale backlight 113 array can better improve the brightness and the uniformity of light emission, and in one example, as shown in fig. 4 and 5, the light source 113 includes a plurality of light beads 1131, that is, the plurality of light beads 1131 are arranged according to a certain arrangement rule to form the light source 113. In one example, the beads 1131 are LED beads 1131, miniLED beads 1131, or micro LED beads 1131, and other types of beads 1131 are also possible, which are not limited herein. In order to ensure uniformity of the collimated light beam 111, the light emitting efficiency of each of the beads 1131 is the same, i.e., the light emitted from each of the beads 1131 is the same.
The light collimating structure 115 converts light emitted by the light source 113 into a collimated light beam 111. The light collimating structure 115 includes optics that collimate the normal light. In one example, as shown in fig. 4 and 5, the light collimating structure 115 includes a transparent substrate 1151 and a plurality of microlenses 1153. The transparent substrate 1151 is configured to allow light to pass therethrough, and is configured to carry the micro lenses 1153, and the transparent substrate 1151 has a light receiving function. Wherein the microlenses 1153 collimate the light emitted by the light source 113. The type of microlens 1153 can be selected according to actual requirements. In one example, microlens 1153 is a cylindrical lens. In another example, microlens 1153 is a two-dimensional lens. It should be noted that, if the stereoscopic viewing angle in the direction perpendicular to the display screen is to be ensured to be as large as that of the common backlight 113, the lenticular lens 1153 is adopted to realize asymmetric light receiving. If the same viewing angle is to be achieved in the direction perpendicular to the display screen and in the horizontal direction parallel to the display screen, then a two-dimensional lens arrangement of microlenses 1153 is used to achieve symmetric light reception.
The array of microlenses 1153 is disposed on the transparent substrate 1151, and specifically, the microlenses 1153 and the lamp beads 1131 are to be disposed in a one-to-one correspondence. That is, the arrangement of the microlenses 1153 on the transparent substrate 1151 is required according to the arrangement of the lamp beads 1131, or the arrangement of the lamp beads 1131 is required according to the arrangement of the microlenses 1153 on the transparent substrate 1151. The one-to-one correspondence between the microlenses 1153 and the beads 1131 means that each microlens 1153 is responsible for collimating the light emitted by one bead 1131. In order to ensure uniformity of the collimated light beam 111, the microlenses 1153 are the same type, the same size, and the same material. In order to reduce the divergence angle of the collimated light beam 111 so that the divergence angle of the collimated light beam 111 is 10 ° or less, it is necessary to ensure the accuracy requirements of the light emitting optical cores of the lamp beads 1131 and the optical axes of the microlenses 1153. In one example, the concentricity of the light emitting optical center of the lamp bead 1131 and the optical axis of the microlens 1153 is between-0.1 ° and +0.1°, for example, the concentricity of the light emitting optical center of the lamp bead 1131 and the optical axis of the microlens 1153 is 0 °, so that the divergence angle of the collimated light beam 111 is reduced by improving the alignment accuracy of the lamp bead 1131 and the microlens 1153. The luminous center of the lamp bead is the luminous center of the lamp bead.
The arrangement of the microlenses 1153 on the transparent substrate 1151 can be set according to practical needs. In one example, as shown in fig. 4, a microlens 1153 is provided on one end surface of the transparent substrate 1151 near the spectroscopic device 13. In another example, as shown in fig. 5, a microlens 1153 is provided on the other end surface of the transparent substrate 1151 facing away from the spectroscopic apparatus 13.
To further reduce the divergence angle of collimated beam 111. In one example, as shown in fig. 4 and 5, the light source 113 further includes a plurality of light receiving members 1133. It should be noted that, the light receiving element 1133 is configured to shrink the divergence angle of the light emitted by the light source 113, so as to reduce the divergence of the light irradiated to the light collimating structure 115. Wherein, the light receiving member 1133 is provided with an accommodation space. For example, as shown in fig. 6, the light receiving element 1133 is a housing with a groove, and the accommodating space is a groove on the light receiving element 1133, and is used for accommodating a cylindrical lens, so as to realize asymmetric light receiving. As another example, as shown in fig. 7, the light receiving element 1133 includes four wall plates, and the four wall plates enclose a receiving space, and the light receiving element is used for receiving the two-dimensional microlens, so as to realize asymmetric light receiving. The light sources 113 are placed in the accommodating spaces, and specifically, the lamp beads 1131 are arranged in the accommodating spaces in a one-to-one correspondence manner, wherein the one-to-one correspondence means that one lamp bead 1131 is arranged in one accommodating space.
The beam splitting device 13 is a device for splitting light and adjusting the exit angle of the collimated light beam 111, and various embodiments are realized, and several possible embodiments are provided below. In one example, as shown in fig. 4 and 5, the spectroscopic assembly 13 includes a grating 131 and an inverse prism film 133. Wherein grating 131 may split collimated beam 111 into spots, allowing a portion of collimated beam 111 to pass therethrough and another portion of collimated beam 111 to be blocked at the same time. For this, the grating 131 includes a plurality of channel units 1311. The channel unit 1311 includes at least two optical channels, and at the same time, as shown in fig. 8, a part of the optical channels on the channel unit 1311 are turned on (the white module in the channel unit 1311 in fig. 8 is turned on), and another part of the optical channels are turned off (the black module in the channel unit 1311 in fig. 8 is turned off). As shown in fig. 8 and 9, at least two optical channels of the channel unit 1311, for example, the channel unit 1311 includes two optical channels, three optical channels, four optical channels, five optical channels, six optical channels, and N optical channels, which may be set according to implementation requirements, and is not specifically limited herein.
In one example, the light channel may be implemented by mechanical means, for example by an electronically controlled micro-door that is opened and closed by a control signal from a controller, thereby allowing and blocking the passage of light. In one example, the light channel may be implemented by liquid crystal, the liquid crystal is filled between two electrodes by using the principle that the liquid crystal changes its alignment direction under the action of an electric field, and the alignment direction of the liquid crystal is changed by changing the voltages on the two electrodes, so as to control the light channel to be opened and closed, thereby implementing the effect of allowing light to pass and blocking light to pass.
The inverse prism film 133 is used to change the exit angle of the collimated light beam 111, which is calculated by the following formula:
where n represents the refractive index of inverse prism 1331, a represents the incident angle of light and the base angle of inverse prism 1331, and θ represents the exit angle of collimated light beam 111. The exit angle can be adjusted by changing the magnitude of the top angle, the magnitude of the bottom angle, or the refractive index of the inverse prism 1331. The magnitude of the vertex angle (pi-2 a) or base angle a of the inverse prism 1331 may be determined according to the desired exit angle θ. The refractive index n of the material is also selected according to the requirement of the exit angle θ, and the calculation formula is as above. Meanwhile, the shape of the inverse prism 1331 is not limited to the inverted triangle shape shown in fig. 4 to 7, for example, the vertex angle is a certain arc or other similar shape, and the above-mentioned required light splitting effect can be achieved.
The inverse prism film 133 includes a plurality of inverse prisms 1331 thereon. The channel units 1311 are disposed in one-to-one correspondence with the inverse prisms 1331, that is, each inverse prism 1331 negatively modulates the exit angle of the collimated light beam 111 transmitted by its corresponding channel unit 1311. The alignment requirement of the channel unit 1311 and the inverse prism 1331 needs to be met, that is, only a part of the collimated light beam 111 passes through the channel unit 1311 at the same time, and the other part of the collimated light beam 111 is blocked, so that the alignment of the channel unit 1311 and the inverse prism 1331 needs to be ensured, and the collimated light beam 111 passing through the channel unit 1311 can only irradiate on one side wall of the inverse prism 1331 at the same time.
To ensure that the collimated light beam 111 passing through the channel unit 1311 at the same time can only impinge on one side wall of the inverse prism 1331, the axis of the inverse prism 1331 being located between two light channels in close proximity. If the inverted prism 1331 is a triangle, the axis is an extension line of the vertical bisector of the base of the triangle of the cross section of the inverted prism 1331. During the first period and the second period, one of the two adjacent light channels is turned on, and the other is turned off, that is, two light channels near the axis of the inverse prism 1331 are ensured, and the light beams passing through during the on cannot simultaneously irradiate on the two side walls of the inverse prism 1331. To reduce the alignment difficulty, the more optical channels the channel unit 1311 needs to contain, the less the alignment difficulty is by increasing the fine pitch of the channel unit 1311.
The specific process of grating 131 light splitting is: one cycle includes a first period of time and a second period of time. As shown in fig. 9, during a first period of time, a part of the optical channels of each channel unit 1311 is turned on to allow the collimated light beam 111 to pass therethrough, and the other part of the optical channels is turned off to block the collimated light beam 111 from passing therethrough, so that the collimated light beam 111 passing through the grating 131 is irradiated on the first side wall of each inverse prism 1331. Wherein each first side wall is positioned on the same side. The same side refers to a side wall of the inverse prism 1331 that is visible from the same viewing direction.
During the second period, a part of the light channels of each channel unit 1311 is closed to block the collimated light beam 111 from passing therethrough, and the other part of the light channels is turned on to allow the collimated light beam 111 passing through the grating 131 to impinge on the second side wall of each inverse prism 1331. Wherein each second side wall is positioned on the same side.
When the grating 131 is a liquid crystal slit grating 131, the specific process of light splitting of the grating 131 is as follows:
as shown in fig. 10, a first voltage is input to the liquid crystal slit grating 131 for a first period of time, a part of the light channels of each channel unit 1311 are turned on to allow the collimated light beam 111 to pass therethrough, and the other part of the light channels are turned off to block the collimated light beam 111 from passing therethrough, so that the collimated light beam 111 passing through the grating 131 is irradiated onto the first side wall of each inverse prism 1331.
As shown in fig. 11, a second voltage is input to the liquid crystal slit grating 131 for a second period of time, a part of the light channels of each channel unit 1311 are closed to block the collimated light beam 111 from passing therethrough, and the other part of the light channels are turned on to allow the collimated light beam 111 to pass therethrough, so that the collimated light beam 111 passing through the grating 131 is irradiated onto the second side wall of each inverse prism 1331.
In this example, the grating 131 is connected to a power supply device, and the power supply device inputs a first voltage and a second voltage to the grating 131. The liquid crystal alignment direction in a part of the optical channels in the channel unit 1311 is different from the liquid crystal alignment direction in another part of the spectroscopic channels. The first voltage and the second voltage can adjust the liquid crystal arrangement direction in a part of the optical channels in the channel unit 1311 and the liquid crystal arrangement direction in another part of the split channels, so that one part of the optical channels is turned on and the other part of the optical channels is turned off at the same time.
In various embodiments of the backlight display system of the present application. The collimating means 11 provides a collimated light beam 111 to the beam splitting means 13. The beam splitting device 13 periodically adjusts the exit angle of the collimated light beam 111. During operation of the backlight display system, each cycle includes a first period of time and a second period of time. The beam splitting device 13 adjusts the collimated light beam 111 to be emitted at a first emission angle during a first period of time. In a second period of time, the beam splitting device 13 adjusts the collimated light beam 111 to be emitted at a second emission angle. The first picture is formed in the direction of the first emergence angle when the collimated light beam 111 is at the first emergence angle, the second picture is formed in the direction of the second emergence angle when the collimated light beam 111 is at the second emergence angle, and the first picture and the second picture are spliced to form a stereoscopic display picture with a larger viewing angle, so that viewing angle splicing is realized, and the stereoscopic viewing angle is improved.
The backlight display system basically comprises a controller and the backlight display system; the controller controls the backlight display system.
The controller is used for controlling the backlight display system to split light and adjusting the emergence angle. Specifically, the light source 113 of the backlight display system may be controlled to emit light, and the light channels in the grating 131 are turned on and off.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. A backlight display system, comprising a collimation device and a beam splitting device;
the collimating device provides a collimated beam to the beam splitting device; the collimating device comprises a light source and a light collimating structure; the light source emits light to the light collimating structure; the light ray collimation structure converts light rays emitted by the light source into the collimated light beams;
the light splitting device periodically adjusts the emergence angle of the collimated light beam; the cycle includes a first period of time and a second period of time;
the beam splitting device adjusts the collimated light beam to be emitted at a first emission angle within the first period of time; in the second period of time, the light splitting device adjusts the collimated light beam to be emitted at a second emission angle;
the light splitting device comprises a grating and a reverse prism film;
the grating comprises a plurality of channel units; the inverse prism film comprises a plurality of inverse prisms; the channel units are arranged in one-to-one correspondence with the inverse prisms;
the channel unit comprises at least two optical channels; in the first period of time, a part of light channels of each channel unit are conducted to allow the collimated light beams to pass, and the other part of light channels are closed to block the collimated light beams from passing, so that the collimated light beams passing through the gratings irradiate on the first side wall of each inverse prism; each first side wall is positioned on the same side;
in the second period of time, a part of light channels of each channel unit are closed to block the collimated light beams from passing through, and the other part of light channels are conducted to allow the collimated light beams to pass through, so that the collimated light beams passing through the gratings irradiate on the second side wall of each inverse prism; each second side wall is positioned on the same side;
the grating is a liquid crystal slit grating;
inputting a first voltage to the liquid crystal slit grating in the first period of time, wherein one part of light channels of each channel unit are conducted to allow the collimated light beams to pass through, and the other part of light channels are closed to block the collimated light beams from passing through so that the collimated light beams passing through the grating irradiate on the first side wall of each inverse prism;
inputting a second voltage to the liquid crystal slit grating in the second period, wherein one part of light channels of each channel unit are closed to block the collimated light beams from passing through, and the other part of light channels are conducted to allow the collimated light beams to pass through, so that the collimated light beams passing through the grating are irradiated on the second side wall of each inverse prism;
the axis of the inverse prism is positioned between two adjacent light channels; during the first period of time and the second period of time, one of the two immediately adjacent light channels is on, and the other is off.
2. The backlight display system of claim 1, wherein the light source comprises a plurality of light beads;
the light collimation structure comprises a transparent substrate and a plurality of micro lenses; the micro lens arrays are arranged on the transparent substrate, and the micro lenses and the lamp beads are arranged in one-to-one correspondence.
3. The backlight display system of claim 2, wherein the light source further comprises a plurality of light receiving members; the light receiving part is provided with an accommodating space; the lamp beads are arranged in the accommodating space in a one-to-one correspondence manner.
4. A backlight display system as claimed in claim 2 wherein the concentricity of the light emitting light center of the lamp beads and the optical axis of the micro lens is between-0.1 ° and +0.1°.
5. The backlight display system as claimed in claim 2 wherein the micro-lenses are disposed on an end face of the transparent substrate adjacent to the light splitting means; or the micro lens is arranged on the other end face of the transparent substrate, which is away from the light splitting device.
6. A backlight display system as claimed in claim 2, characterized in that the micro-lenses are lenticular lenses or two-dimensional lenses.
7. A backlight display system as claimed in claim 1 wherein the divergence angle of the collimated light beam is 10 ° or less.
8. A display device comprising a controller and a backlight display system as claimed in any one of claims 1 to 7; the controller controls the backlight display system.
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| CN202210911968.4A CN115202067B (en) | 2022-07-29 | 2022-07-29 | Backlight display system and display device |
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| CN102830537A (en) * | 2012-08-31 | 2012-12-19 | 北京京东方光电科技有限公司 | Color film substrate, manufacturing method thereof and display device |
| CN105717655A (en) * | 2016-04-20 | 2016-06-29 | 上海交通大学 | Three-dimensional display device |
| CN114035340A (en) * | 2021-11-30 | 2022-02-11 | 京东方科技集团股份有限公司 | Backlight module, display module, driving method and display device |
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| TWI418895B (en) * | 2010-03-10 | 2013-12-11 | Coretronic Corp | Backlight module and stereo display apparatus |
| TW201224515A (en) * | 2010-12-13 | 2012-06-16 | Ind Tech Res Inst | Display with dimension switchable function |
| KR20160068110A (en) * | 2014-12-04 | 2016-06-15 | 삼성디스플레이 주식회사 | Stereoscopic display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830537A (en) * | 2012-08-31 | 2012-12-19 | 北京京东方光电科技有限公司 | Color film substrate, manufacturing method thereof and display device |
| CN105717655A (en) * | 2016-04-20 | 2016-06-29 | 上海交通大学 | Three-dimensional display device |
| CN114035340A (en) * | 2021-11-30 | 2022-02-11 | 京东方科技集团股份有限公司 | Backlight module, display module, driving method and display device |
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