CN112596296A - Projection type holographic grating backlight structure - Google Patents
Projection type holographic grating backlight structure Download PDFInfo
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- CN112596296A CN112596296A CN202011631430.5A CN202011631430A CN112596296A CN 112596296 A CN112596296 A CN 112596296A CN 202011631430 A CN202011631430 A CN 202011631430A CN 112596296 A CN112596296 A CN 112596296A
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- holographic grating
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- light source
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 12
- 239000003086 colorant Substances 0.000 claims description 7
- 239000004065 semiconductor Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims 3
- 238000001125 extrusion Methods 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004737 colorimetric analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The invention discloses a projection type holographic grating backlight structure, wherein a mounting plate is provided with a sliding groove, a movable frame is connected with the mounting plate in a sliding manner, the movable frame is positioned in the sliding groove and is provided with a sliding groove, the movable frame can slide in the sliding groove, and when the backlight structure is damaged, the movable frame is moved to slide out from the sliding groove, so that a light source, a reflecting surface, a flat waveguide layer, a complex transmission holographic grating, a liquid crystal layer and a three-primary-color filter which are arranged on the movable frame can be moved out of the equipment, a worker can conveniently maintain the backlight structure, and the problem that the backlight structure is inconvenient to maintain when the backlight structure is damaged is solved.
Description
Technical Field
The invention relates to the technical field of LED illumination, in particular to a projection type holographic grating backlight structure.
Background
The LED backlight module structure can be divided into a side-in type and a direct type at present, but the basic principle is that full light mixing is realized by utilizing the light to be totally reflected for multiple times in the light guide plate, a certain light mixing distance is needed, the thickness ultra-thinning is not easy to realize, meanwhile, because the side-edge type backlight structure needs to use the backlight plate to convert the LED point light source into a surface light source, the light is emitted from the surface, and the light can also cause the loss of the light when being mixed in the light guide plate. The loss of light energy deteriorates uniformity and brightness, and as the size increases, uniformity deteriorates, so that it is difficult to realize a large-sized display in the edge type backlight structure. Most of the existing backlight structures are fixedly installed in equipment, and the backlight structures are inconvenient to maintain when damaged.
Disclosure of Invention
The present invention is directed to a projection type holographic grating backlight structure, which is provided to maintain the backlight structure.
In order to achieve the above object, the present invention provides a projection type holographic grating backlight structure, which comprises a mounting plate, a movable frame, a light source, a reflecting surface, a flat waveguide layer, a complex transmissive holographic grating, a liquid crystal layer and a three primary colors color filter, wherein the movable frame is rectangular, the reflecting surface is fixedly mounted on the inner side of the movable frame, the reflecting surface is located at a vertex angle of the movable frame, the light source is fixedly mounted on the inner side of the movable frame, the light source is located at a position of the movable frame close to the reflecting surface, one side of the reflecting surface close to the light source is obliquely arranged, the flat waveguide layer is fixedly mounted on the inner side of the movable frame, the complex transmissive holographic grating is located at a side of the flat waveguide layer far from the light source, and the liquid crystal layer is fixedly, the liquid crystal layer is positioned on one side of the complex transmission holographic grating far away from the flat waveguide layer, the three-primary-color filter is fixedly arranged on the inner side of the movable frame, the three-primary-color filter is positioned on one side of the liquid crystal layer far away from the complex transmission holographic grating, the mounting plate is provided with a sliding groove, the movable frame is in sliding connection with the mounting plate, and the movable frame is positioned inside the sliding groove.
The mounting plate is provided with a clamping opening matched with the clamping support, the clamping opening is communicated with the sliding groove, and the clamping support is located inside the clamping opening.
The projection type holographic grating backlight structure further comprises a baffle, one end of the baffle is rotatably connected with the mounting plate, and the other end of the baffle is detachably connected with the mounting plate.
Wherein, the baffle has the through-hole, the mounting panel is equipped with the fixed axle, the fixed axle is worn to establish the inside of through-hole.
Wherein, the holographic grating backlight structure of projection type still includes fixed knot structure, fixed knot structure includes compression spring and mount, the mount is colluded the shape, the mounting panel has the installation cavity, the baffle is equipped with the link, the connector has on the link, compression spring's one end with mounting panel fixed connection, compression spring's the other end with mount fixed connection, compression spring is located the inside of installation cavity, the mount with mounting panel sliding connection, the mount is located the inside of installation cavity, the one end of mount is located the inside of connector.
The flat waveguide layer is made of quartz glass, and the refractive index range of the flat waveguide layer is 1.5-1.6.
Wherein, the light source is a miniature semiconductor laser.
The invention has the beneficial effects that: through with mounting panel fixed mounting is in the inside of equipment to make this projection type holographic grating structure in a poor light can normally work, the adjustable shelf has the sliding tray, the adjustable shelf can slide in the inside of sliding tray, when the structure in a poor light takes place to damage, removes the adjustable shelf is in order to follow the adjustable shelf the inside roll-off of sliding tray, so that install on the adjustable shelf light source, plane of reflection, dull and stereotyped waveguide layer, complex body transmission holographic grating, liquid crystal layer and three primary colors color filters can shift out from equipment is inside, so that the staff maintains it, thereby solved the structure in a poor light and taken place to be inconvenient for when damaging to be in a poor light the problem of maintaining the structure in a poor light.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a projection type holographic grating backlight structure of the present invention.
Fig. 2 is a cross-sectional view at a-a of fig. 1 of the present invention.
The three-dimensional color filter comprises a 1-light source, a 2-reflecting surface, a 3-flat waveguide layer, a 4-complex transmission holographic grating, a 5-liquid crystal layer, a 6-three-primary-color filter, a 7-mounting plate, a 71-sliding groove, a 72-clamping port, a 73-fixing shaft, a 74-mounting cavity, an 8-movable frame, an 81-clamping bracket, a 9-baffle, a 91-through hole, a 92-connecting frame, a 921-connecting port, a 10-fixing structure, a 101-compression spring, a 102-fixing frame and an 11-extrusion frame.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 and fig. 2, the present invention provides a technical solution: a projection type holographic grating backlight structure comprises a mounting plate 7, a movable frame 8, a light source 1, a reflecting surface 2, a flat waveguide layer 3, a complex transmission holographic grating 4, a liquid crystal layer 5 and a tricolor color filter 6, wherein the movable frame 8 is rectangular, the reflecting surface 2 is fixedly arranged on the inner side of the movable frame 8, the reflecting surface 2 is positioned at a vertex angle of the movable frame 8, the light source 1 is fixedly arranged on the inner side of the movable frame 8, the light source 1 is positioned at a position where the movable frame 8 is close to the reflecting surface 2, one surface of the reflecting surface 2 close to the light source 1 is obliquely arranged, the flat waveguide layer 3 is fixedly arranged on the inner side of the movable frame 8, the complex transmission holographic grating 4 is positioned on one side of the flat waveguide layer 3 away from the light source 1, the liquid crystal layer 5 is fixedly installed on the inner side of the movable frame 8, the liquid crystal layer 5 is located on one side, away from the flat waveguide layer 3, of the complex transmission holographic grating 4, the three-primary-color filter 6 is fixedly installed on the inner side of the movable frame 8, the three-primary-color filter 6 is located on one side, away from the complex transmission holographic grating 4, of the liquid crystal layer 5, the mounting plate 7 is provided with a sliding groove 71, the movable frame 8 is in sliding connection with the mounting plate 7, and the movable frame 8 is located inside the sliding groove 71.
In this embodiment, the light source 1 is configured to provide light beams of three colors, red, green and blue, the reflecting surface 2 is configured to adjust an angle of light emitted from the light source 1, so that the light is incident on the flat waveguide layer 3 and can be totally reflected, and the flat waveguide layer 3 is configured to change a transmission direction of a point light source, so that a line light source or the point light source is changed into a surface light source; the complex transmission holographic grating 4 is used for improving the uniformity and monochromaticity of emergent light, the liquid crystal layer 5 is used for controlling the brightness value of each pixel point, the three-primary-color filter 6 is used for restoring the three primary colors of each pixel point, and the color mixing effect can be achieved according to different proportions of the brightness of the three primary colors according to the colorimetry principle. Mounting panel 7 fixed mounting is in the inside of equipment to make this projection type holographic grating structure of being shaded can normally work, adjustable shelf 8 has sliding tray 71, adjustable shelf 8 can sliding tray 71's inside slides, when the structure of being shaded takes place to damage, removes adjustable shelf 8 is with inciting somebody to action adjustable shelf 8 follows sliding tray 71's inside roll-off, so that install on adjustable shelf 8 light source 1, plane of reflection 2, dull and stereotyped waveguide layer 3, complex body transmission holographic grating 4, liquid crystal layer 5 and three primary colors color filters 6 can shift out from the equipment is inside, so that the staff maintains it, thereby has solved the problem that is not convenient for to maintain the structure of being shaded when the structure of being shaded takes place to damage.
Further, both sides of the movable frame 8 are provided with clamping brackets 81, the clamping brackets 81 and the movable frame 8 are integrally formed, the mounting plate 7 is provided with clamping openings 72 matched with the clamping brackets 81, the clamping openings 72 are communicated with the sliding groove 71, and the clamping brackets 81 are located inside the clamping openings 72.
In the present embodiment, the engaging holder 81 is slidable inside the engaging opening 72 to regulate the position of the movable frame 8, and the movable frame 8 is prevented from sliding inside the sliding groove 71, so that the sliding effect of the engaging holder 81 is improved.
Further, the projection type holographic grating backlight structure further comprises a baffle 9, one end of the baffle 9 is rotatably connected with the mounting plate 7, and the other end of the baffle 9 is detachably connected with the mounting plate 7.
In this embodiment, the baffle 9 abuts against the movable frame 8, so that the movable frame 8 is fixed inside the sliding groove 71, and the projection type holographic grating backlight structure can normally operate.
Further, the baffle 9 is provided with a through hole 91, the mounting plate 7 is provided with a fixing shaft 73, and the fixing shaft 73 is arranged in the through hole 91 in a penetrating manner.
In this embodiment, the fixing shaft 73 is inserted into the through hole 91, and the baffle plate 9 can rotate around the fixing shaft 73 to realize the rotational connection between the baffle plate 9 and the mounting plate 7.
Further, projection type holographic grating structure in a poor light still includes fixed knot structure 10, fixed knot structure 10 includes compression spring 101 and mount 102, mount 102 is colluding the shape, mounting panel 7 has installation cavity 74, baffle 9 is equipped with link 92, connector 921 has on the link 92, compression spring 101 one end with mounting panel 7 fixed connection, compression spring 101 the other end with mount 102 fixed connection, compression spring 101 is located the inside of installation cavity 74, mount 102 with mounting panel 7 sliding connection, mount 102 is located the inside of installation cavity 74, the one end of mount 102 is located the inside of connector 921.
In the present embodiment, the fixing structure 10 can fix the baffle plate 9 and the mounting plate 7 and can detach the baffle plate 9 and the mounting plate 7 to thereby achieve the detachable connection between the baffle plate 9 and the mounting plate 7, when the baffle plate 9 and the mounting plate 7 are fixed, one end of the fixed frame 102 is positioned inside the connection port 921, the baffle plate 9 is fixed to fix the movable frame 8 inside the slide groove 71 by preventing the baffle plate 9 from rotating with respect to the mounting plate 7, and when the movable frame 8 needs to be slid out of the slide groove 71, the fixed frame 102 is pressed to withdraw one end of the fixed frame 102 from the inside of the connection port 921 so that the baffle plate 9 can rotate with respect to the mounting plate 7 to thereby slide out the movable frame 8 from the inside of the slide groove 71, so that the worker can maintain the projection type holographic grating backlight structure conveniently.
Further, the flat waveguide layer 3 is made of quartz glass, and the refractive index range of the flat waveguide layer 3 is 1.5-1.6.
In this embodiment, the flat waveguide layer 3 is made of quartz glass, the refractive index is 1.55, and according to brewster's law, if the light is to be totally reflected in the flat waveguide layer 3, the incident angle of the light should be not less than 40 °, and when the total reflection condition is satisfied, if the angle of the diffracted light in the waveguide is larger, the illumination area is also larger. However, under the condition of a certain waveguide size, when the angle of light in the waveguide is too large, the emergent light is discontinuous and uniform display cannot be realized, and the upper limit of the total reflection angle of the projection type holographic grating backlight structure is set to be 1.6, so that the total reflection angle range is 1.5-1.6.
Further, the light source 1 is a micro semiconductor laser.
In this embodiment, the light source 1 employs a micro semiconductor laser, which has better performance than an LED, and outputs light in a high polarization state, and the light output by the LED is randomly polarized, so that compared with the LED, the light efficiency of the micro semiconductor laser is better, the divergence angle of the semiconductor laser is small, and the spectral bandwidth of the semiconductor laser is narrower than that of the LED, so that the monochromaticity is much higher than that of the LED, and thus a larger color gamut range can be obtained, and real color can be presented.
Further, the projection type holographic grating backlight structure further comprises an extrusion frame 11, the extrusion frame 11 is made of rubber, the extrusion frame 11 is fixedly connected with the baffle 9, and the extrusion frame 11 is located on one side of the baffle 9 close to the sliding groove 71.
In this embodiment, the extrusion frame 11 can support the movable frame 8, so as to fix the movable frame 8, so that the fixing effect of the movable frame 8 is better, and the extrusion frame 11 is made of rubber, so that the movable frame 8 is not damaged during extrusion.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A projection type holographic grating backlight structure is characterized in that,
including mounting panel, adjustable shelf, light source, plane of reflection, dull and stereotyped waveguide layer, compound body transmission holographic grating, liquid crystal layer and three primary colors color filters, the adjustable shelf is the rectangle, plane of reflection fixed mounting be in the inboard of adjustable shelf, the plane of reflection is located an apex angle department of adjustable shelf, light source fixed mounting in the inboard of adjustable shelf, the light source is located the adjustable shelf is close to plane of reflection department, the plane of reflection is close to the one side slope setting of light source, dull and stereotyped waveguide layer fixed mounting be in the inboard of adjustable shelf, compound body transmission holographic grating is located dull and stereotyped waveguide layer keeps away from one side of light source, the liquid crystal layer fixed mounting be in the inboard of adjustable shelf, the liquid crystal layer is located compound body transmission holographic grating keeps away from one side of dull and stereotyped waveguide, the three-primary-color filter is fixedly arranged on the inner side of the movable frame, the three-primary-color filter is positioned on one side, away from the complex transmission holographic grating, of the liquid crystal layer, the mounting plate is provided with a sliding groove, the movable frame is connected with the mounting plate in a sliding mode, and the movable frame is positioned inside the sliding groove.
2. The projection type holographic grating backlight structure of claim 1,
the mounting plate is provided with a clamping opening matched with the clamping support, the clamping opening is communicated with the sliding groove, and the clamping support is located inside the clamping opening.
3. The projection type holographic grating backlight structure of claim 2,
the projection type holographic grating backlight structure further comprises a baffle, one end of the baffle is rotatably connected with the mounting plate, and the other end of the baffle is detachably connected with the mounting plate.
4. The projection type holographic grating backlight structure of claim 3,
the baffle has a through hole, the mounting panel is equipped with the fixed axle, the fixed axle wears to establish the inside of through hole.
5. The projection type holographic grating backlight structure of claim 4,
the projection type holographic grating backlight structure further comprises a fixing structure, the fixing structure comprises a compression spring and a fixing frame, the fixing frame is in a hook shape, the mounting plate is provided with a mounting cavity, the baffle is provided with a connecting frame, a connecting port is formed in the connecting frame, one end of the compression spring is fixedly connected with the mounting plate, the other end of the compression spring is fixedly connected with the fixing frame, the compression spring is located in the mounting cavity, the fixing frame is slidably connected with the mounting plate, the fixing frame is located in the mounting cavity, and one end of the fixing frame is located in the connecting port.
6. The projection type holographic grating backlight structure of claim 1,
the flat waveguide layer is made of quartz glass, and the refractive index range of the flat waveguide layer is 1.5-1.6.
7. The projection type holographic grating backlight structure of claim 1,
the light source is a miniature semiconductor laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631430.5A CN112596296A (en) | 2020-12-31 | 2020-12-31 | Projection type holographic grating backlight structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011631430.5A CN112596296A (en) | 2020-12-31 | 2020-12-31 | Projection type holographic grating backlight structure |
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| CN112596296A true CN112596296A (en) | 2021-04-02 |
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| CN211348925U (en) * | 2020-03-06 | 2020-08-25 | 滁州市艾洛维电子科技有限公司 | LED LCD screen lifting component |
| CN211878374U (en) * | 2020-03-28 | 2020-11-06 | 深圳市创马优精密电子有限公司 | Anti-static liquid crystal display module |
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