CN113759567A - Light adjusting member, light source module and naked eye 3D display device - Google Patents
Light adjusting member, light source module and naked eye 3D display device Download PDFInfo
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- CN113759567A CN113759567A CN202110989247.0A CN202110989247A CN113759567A CN 113759567 A CN113759567 A CN 113759567A CN 202110989247 A CN202110989247 A CN 202110989247A CN 113759567 A CN113759567 A CN 113759567A
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- light
- grating structure
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- emergent
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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
Abstract
The invention discloses a light adjusting member, which comprises a carrier and grating structures, wherein the grating structures are positioned on the upper surface of the carrier and are arranged at certain intervals, and the grating structures are used for adjusting light emergent positions of light rays emitted into the grating structures to form a plurality of light emergent areas; and a reflector located below the grating structure, aligned with the grating structure, the reflector being capable of redirecting light rays directed thereto; the light adjusting member disclosed by the invention can adjust the emergent position of light rays emitted to the light adjusting member, so that the emergent light rays are converged to generate a focus, a real image is generated at a position far away from the focus, the real image and the image can generate parallax, and the parallax is utilized to generate the depth sense of the image, thereby forming a 3D effect. In addition, the invention also discloses a light source module and a naked eye 3D display device, which can reduce the loss of display brightness while realizing the 3D display effect.
Description
Technical Field
The present invention relates to the field of stereoscopic display technologies, and in particular, to a light adjustment member and a light source device.
Background
Three-dimensional (3D) display is deeply favored by consumers due to its real and vivid expressive force and strong visual impact effect.
The 3D display technology comprises naked eye 3D and glasses-wearing type 3D display technologies, wherein the parallax barrier technology is one of the mainstream naked eye 3D display technologies at present, a series of light and dark alternate stripes (parallax barriers) are mainly manufactured by utilizing a liquid crystal layer and a polarizing film, the parallax barriers can be activated in a stereoscopic display mode, two parts 2 of image information with left and right eye parallax independently enter the left eye (only left eye information) and the right eye (only right eye information) of a person, and the brain of a viewer obtains stereoscopic impression after being processed. The parallax barrier technology is compatible with the existing LCD process, and has advantages in mass productivity and cost, but due to the structure and imaging principle, the brightness of the image is less than half of that of the common liquid crystal display, and a specific liquid crystal display is required to display a 3D image. Therefore, it is necessary to provide a new light adjusting member and a corresponding naked-eye 3D display device, which can reduce the loss of display brightness while realizing a 3D effect, and is adapted to any existing common liquid crystal screen.
Disclosure of Invention
In order to overcome the above defects, embodiments of the present invention provide a new light modulation member, a light source module and a naked-eye 3D display device, which can reduce the loss of display brightness while achieving a 3D effect.
The technical scheme adopted by one embodiment of the invention to solve the technical problem is as follows: there is provided a novel light adjustment member including: a carrier having an upper surface; the grating structures are arranged on the upper surface of the carrier at certain intervals and used for adjusting the light emergent positions of the light rays emitted into the grating structures to form a plurality of light emergent areas; a reflector positioned below the grating structure in alignment with the grating structure, the reflector capable of redirecting light directed thereto; and a barrier region is formed between any adjacent light emergent regions in the plurality of light emergent regions, and the light emergent regions and the barrier regions are sequentially and alternately arranged.
As a further improvement of the present invention, the reflector is formed on a film layer located below the carrier, and the reflector may be a resin body or a metal body disposed on the film layer.
As a further improvement of the invention, the light rays incident on the grating structure comprise light rays directly incident on the grating structure and light rays which are reflected at least once by the reflector and then are incident on the grating structure.
As a further development of the invention, the light directed to the spacing portion of the grating structure exits at least partially through the light exit region.
As a further improvement of the invention, the grating structure further comprises an optical medium layer, wherein the optical medium layer is positioned below the film layer, and light rays are emitted to the grating structure, the reflector and the interval part of the grating structure through the optical medium layer.
As a further improvement of the present invention, the outgoing light ray formed after being adjusted by the light adjusting member, which is mainly emitted toward the display panel through the light exit region, may be used as a light source of the display panel.
As a further development of the invention, the carrier also has a lower surface opposite the upper surface, the reflector being formed at the lower surface of the carrier.
As a further improvement of the invention, the shape of the grating structure can be a quadrangle, a triangle or a cylindrical lens.
On the other hand, the embodiment of the invention also provides a light source module, which comprises a backlight module and a light adjusting member, wherein the light adjusting member is positioned at the light emergent side of the backlight module, and light rays from the backlight module are emergent after being adjusted by the light adjusting member.
In another aspect, an embodiment of the present invention further provides a naked-eye 3D display device, including a backlight module, a light adjusting member and a display panel, where light from the backlight module is adjusted by the light adjusting member to form emergent light, and the emergent light may be used as a light source of the display panel.
The invention has the beneficial effects that: according to the light adjusting member, the light source module and the naked eye 3D display device provided by the embodiment of the invention, the emergent position of light is adjusted through the light adjusting member, so that the emergent light is converged to generate a focus, a real image is generated at a position far away from the focus, parallax can be generated in the real image and the image, the depth feeling of the image is generated by utilizing the parallax, and a 3D effect is further formed. The light adjusting component and the light source module provided by the embodiment of the invention can be directly matched with the existing display panel for use, and the practicability is higher. The naked eye 3D display device manufactured based on the light adjusting member provided by the embodiment of the invention can form a 3D effect without manufacturing different pictures on the left side and the right side, and can reduce the loss of display brightness.
Drawings
Fig. 1 is a schematic diagram of a naked eye 3D display device according to an embodiment of the present invention, which forms a 3D picture;
fig. 2 is a schematic structural view of a light adjustment member 2 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the light path after the light passes through the light modulating structure;
fig. 4 is a schematic view of a light exit region and a barrier region formed by the adjustment of the light adjustment member 2 according to the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a light source module according to an embodiment of the invention.
The following description is made with reference to the accompanying drawings:
1-display panel; 2 — a light adjusting member;
3-backlight module; 6-light source;
7-light guide plate; 8-prism sheet;
9-reflector plate; 21-a carrier;
22-grating structure; 23-a reflector;
25-spacer portion; 26-optical medium layer;
230-film layer; 302-light exit area;
303-barrier region.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
According to the light adjusting component provided by the embodiment of the invention, the reflector and the grating structure are arranged in an aligned manner, the light is redirected through the reflector, and the emergent position of the light is limited by matching with the adjusting action of the grating structure, so that the light is converged to generate a focus, a real image is generated at a position far away from the focus, the real image and the image generate parallax, the parallax is utilized to generate the depth feeling of the image, and a 3D effect is further formed. The naked eye 3D display device manufactured based on the light adjusting member provided by the embodiment of the invention does not need to manufacture different pictures on the left side and the right side. In addition, the light adjusting member mainly adjusts the light emitting position of the light, and shields less light, so that the loss of display brightness can be reduced while the 3D effect is achieved.
Fig. 1 is a schematic diagram of a naked-eye 3D display device manufactured based on a light adjustment member according to an embodiment of the present invention to form a 3D screen. As shown in fig. 1, the naked-eye 3D display device includes a display panel 1, a light adjusting member 2, a backlight module 3, the light adjusting member 2 is located between the display panel 1 and the backlight module 3, light from the backlight module 3 forms a light emitting area 302 and a barrier area 303 alternately arranged in sequence under the action of the light adjusting member 2, the light adjusted by the light adjusting member 2 mainly converges after passing through the light emitting area to generate a focus p, a real image is generated at a place far from the focus p, the real image and an image on the display panel generate a parallax, and the parallax is used to generate a depth sensation of the image, thereby forming a 3D effect. The naked eye 3D display device provided by the embodiment of the invention has less light shielding and mainly changes the emergent position of light, so that the loss of display brightness is reduced while the 3D effect is realized compared with the existing naked eye 3D display technology. In addition, the naked-eye 3D display device manufactured based on the light adjusting member according to the embodiment of the present invention does not need to manufacture a screen having a different left and right sides because of the depth feeling of the image due to the parallax between the real image and the image, and can be used in combination with an existing display, thereby having high practicability.
The following will describe embodiments of the present invention in detail.
Fig. 2 is a schematic structural diagram of the light modulating member 2 according to an embodiment of the present invention, and fig. 3 is a schematic optical path diagram of light after passing through the light modulating member 2. Referring to fig. 2 and 3, the light modulation member 2 includes a carrier 21, a grating structure 22 and a reflector 23. The carrier 21 may for example be a plate-like structure having a thickness, having an upper surface and a lower surface, the grating structure 22 being located at the upper surface of the carrier 21 at a distance. It is understood that the grating structure 22 may be located just above the upper surface of the carrier 21, or the grating structure 22 may be located within the carrier 21 close to the upper surface, or may be slightly protruding from the upper surface of the carrier 21. The carrier 21 is preferably made of a material with high transparency and easy light transmission, such as Polymethyl methacrylate (PMMA), Polycarbonate (PC), Cyclic Olefin Polymer (COP), or Cyclic Olefin Copolymer (COC), but other materials with easy light transmission are also possible.
In one embodiment of the present invention, the grating structures 22 are located at the upper surface of the carrier 21 at certain intervals, and if the carrier 21 is a rectangular plate-shaped structure, the grating structures 22 may be strip-shaped structures located at the upper surface of the rectangular plate-shaped structure and having a certain width W1 one by one, the strip-shaped grating structures 22 extending from one side to the other side of the carrier 21. The width W1 of the spacing portion 25 of the grating structure 22 and the width W2 of the grating structure 22 are related to the size of the pixel, and the widths W1 and W2 can be adjusted according to the size of the pixel, and the final width is based on the light-transmitting area without blocking the pixel.
The grating structure 22 may be formed at the upper surface of the carrier 21 by a process such as injection molding, extrusion molding, or hot pressing. Further, the shape of the grating structure 22 may be one or more of a quadrangle, a triangle, or a lenticular lens. According to the grating equation: when light is vertically incident on the grating: d sin thetamM λ; the light ray is incident at an angle of incidence thetaiWhen the light enters: d (sin θ)m-sinθi) By setting appropriate parameters, such as wavelength λ, grating constant d, and m λ (incident and diffracted light being on opposite sides of the grating normal), light directed towards the grating structure 22 can be made to deviate from the normal θ after conditioning by the grating structure 22mThe light is emitted in the direction of the angle, so that a plurality of light emitting areas are formed, and the number of the light emitting areas is related to the number of the grating structures. It is understood that the light-exiting region refers to a region through which light passes.
A reflector 23 is located below the grating structure 22 in alignment with the grating structure 22. Wherein alignment may mean that the reflector 23 is of the same scale as the grating structure 22, the orthographic projection of the grating structure 22 coincides with the reflector 23, or that the reflector 23 is of a different scale from the grating structure 22, the orthographic projection of the grating structure 22 partly coincides with the reflector 23. The reflector 23 is configured to redirect a portion of the light directed thereto, for example, a portion of the light directed to the reflector 23 may be directed to an adjacent grating structure 22 after being totally reflected at least once, and the light directed to the grating structure 22 is emitted in a direction deviating from the normal under the adjustment of the grating structure to form a light emitting region, so that a region corresponding to the grating structure 22, that is, between any adjacent light emitting regions, forms a barrier region correspondingly because at most only a few light passes through. It will be appreciated that the barrier region is only passing relatively little light, not absolutely no light.
The reflector 23 may be formed on the film layer 230, for example. Specifically, the film layer 230 may be Polyethylene terephthalate (PET), PMMA, or other similar composite materials having high transparency. The film layer 230 may be the same shape as the carrier 21, and is located below the carrier 21. The reflector 23 may be, for example, a resin body coated with white or silver at a position on the film layer aligned with the grating structure 22, or may be a metal body. Of course, it is understood that in other embodiments of the present invention, the reflector 23 may be directly formed on the lower surface of the carrier 21, and the additional film layer 230 is not required.
The following describes in detail the direction of the light path after the light is directed to the light adjusting member 2. Referring again to fig. 3, the light directed to the light modulation member 2 may be entirely divided into three parts, a part of the light directed to the grating structures 22, a part directed to the reflector 23, and a part directed to the space portions 25 between the grating structures. Part of the light directly emitted to the grating structure 22, for example, the light a, is directly diffracted to emit out of the grating structure 22, and the region where the part of the emitted light is located, correspondingly, forms a light emitting region, and part of the light directly emitted to the grating structure 22, for example, the light b, does not emit out of the grating structure 22 at one time, but at least one reflection occurs between the grating structure 22 and the reflector 23, and the light is redirected and then emitted to the grating structure 22 again, and then the light is emitted out of the grating structure 22 through the grating diffraction effect, and the emitted light here is also diffracted to emit out of the grating structure 22 through the grating structure 22, so that the emitted light formed by the part of the emitted light passing through the grating structure 22 is not distinguished, and similarly, the region where the part of the emitted light passes through also correspondingly forms a light emitting region.
A portion of the light, such as the light d, is directed towards the reflector 23 and reflected by the reflector 23, it being understood that to increase the efficiency of light utilization, the refractive index n1 of the reflector 23 may be greater than the refractive index of the surrounding light propagation medium, so as to enable total reflection. By setting the distance between the grating structures 22 and the reflector 23, the incident angle of the light d to the reflector 23 is larger than the critical angle at which the light is totally emitted, so that the light d directly emitted to the reflector 23 is totally reflected when encountering the reflector 23, returns to, for example, a prism sheet of a backlight module, and then emits to the reflector 23, and thus after multiple total reflections, the light d is finally emitted to the adjacent grating structures 22 or the spacing portions 25 between the grating structures. It will be appreciated that due to the redirection of the light by the reflector 23 and the adjustment of the light by the grating structure 22, the regions corresponding to the grating structure 22, i.e. between adjacent light exit regions, form correspondingly barrier regions due to at most very little light passing through.
A portion of the light, for example the light e, which exits the carrier 21 via normal light refraction, i.e. which exits through the light exit region, is directed towards the spacing portions 25 between the grating structures 22. It will be appreciated that there may be portions of light, e.g. light c, directed towards the spacer portions 25 which, after normal refraction of light at the spacer portions 25, are directed into the regions corresponding to the grating structures 22, i.e. the barrier regions, such that no light is originally passed through the barrier regions, while a small amount of light is passed through, and it can be seen that the barrier regions are not in fact absolutely free of light.
As can be seen from the above analysis, the light emitted to the grating structure 22 includes light directly emitted to the grating structure 22 and light emitted to the grating structure 22 after being reflected at least once by the reflector 23.
In addition, in an embodiment of the light adjusting member 2 provided by the present invention, a light medium layer 26 may be further included, the light medium layer 26 is located below the film layer 230, and the light medium layer 26 may be PMMA, PC, COP or COC. The light is directed through the optical medium layer 26 towards the grating structure 22, the reflector 23 and the space 25 between the grating structures, respectively. It is understood, of course, that the layer of optical media 26 may be air.
Fig. 4 is a schematic diagram showing light exit regions and barrier regions formed after light passes through the light modulation member 2, and the light exit regions 302 and the barrier regions 303 are alternately arranged in this order as shown in fig. 4. Note that the light exit area 302 refers to a region through which light mainly passes, and the barrier area refers to a region through which only a small amount of light passes at most. "predominantly" in a predominantly light passing region generally means that at least more than half of the light passes through, and correspondingly, "less" generally means that less than half of the light passes through.
The light adjusting member 2 can adjust the outgoing position of the light rays emitted thereto, so that the outgoing light rays are converged to form a focal point, a real image is generated at a position away from the focal point, parallax is generated between the real image and the image, and the parallax is used to generate a sense of depth of the image, thereby forming a 3D effect.
According to the light adjusting member provided by the embodiment of the invention, the reflector 23 and the grating structure 22 are arranged, the grating structure 22 is aligned with the reflector 23, the emergent position of the light rays emitted to the light adjusting member is adjusted by utilizing the light redirecting effect of the reflector 23 and the adjusting effect of the grating structure 22, so that the emergent light rays are converged to generate a focus, a real image is generated at a position far away from the focus, the parallax is generated due to the existence of the real image and the image, the depth feeling of the image is generated by utilizing the parallax, and the 3D effect is further formed.
According to another embodiment of the present invention, a light source module is provided, and fig. 5 is a schematic structural view of the light source module provided in one embodiment of the present invention, as shown in fig. 5, the light source module includes a backlight module 3 and a light adjusting member 2, and the backlight module 3 includes a light source 6, such as an LED, a light guide plate 7, a prism sheet 8, a reflector sheet 9, and the like. The light adjusting member 2 has the structure as described above, the light adjusting member 2 is located on the light emitting side of the backlight module 3, and the light from the backlight module 3 is emitted after the light adjusting member 2 performs the adjusting function. The backlight module 3 may be of a side-light type or a direct-type structure.
According to another embodiment of the present invention, a naked-eye 3D display device is provided, which includes the backlight module, the light adjusting member and the display panel as described above, wherein light from the backlight module is adjusted by the light adjusting member and then emitted, and the formed emitted light can be used as a light source of the display panel. It is understood that the emergent light mainly exits through the emergent area. The emergent light rays pass through the display panel and then converge to the focus point P, a real image is formed at a position far away from the focus point P, parallax is generated between the real image and the image on the display panel, the depth feeling of the image is generated by utilizing the parallax, and then the 3D effect is formed. In the naked eye 3D display device provided by the embodiment of the invention, light is not finally blocked or time-sharing utilized, so that the loss of display brightness can be reduced while 3D display is realized.
The light adjusting member and the light source module provided by the embodiment of the invention can be directly matched with the existing display panel (such as a liquid crystal display panel) for use, and have higher practicability. Further, since the sense of depth of the image is generated by the parallax between the real image and the image, it is not necessary to create screens different between the left and right sides.
In the previous description, numerous specific details were set forth in order to provide a thorough understanding of the present invention. The foregoing description is only a preferred embodiment of the invention, which can be embodied in many different forms than described herein, and therefore the invention is not limited to the specific embodiments disclosed above. And that those skilled in the art may, using the methods and techniques disclosed above, make numerous possible variations and modifications to the disclosed embodiments, or modify equivalents thereof, without departing from the scope of the claimed embodiments. Any simple modifications to the above embodiments according to the technical essence of the present invention are possible without departing from the content of the technical solution of the present invention.
Claims (10)
1. A light conditioning member comprising:
a carrier having an upper surface;
the grating structures are arranged on the upper surface of the carrier at certain intervals and used for adjusting the light emergent positions of the light rays emitted into the grating structures to form a plurality of light emergent areas;
a reflector positioned below the grating structure in alignment with the grating structure, the reflector capable of redirecting light directed thereto;
and a barrier region is formed between any adjacent light emergent regions in the plurality of light emergent regions, and the light emergent regions and the barrier regions are sequentially and alternately arranged.
2. The light conditioning member of claim 1, wherein: the reflector is formed on a film layer located below the carrier, and may be a resin body or a metal body disposed on the film layer.
3. The light conditioning member of claim 1, wherein the light incident on the grating structure includes light directed toward the grating structure and light reflected by the reflector at least once and directed toward the grating structure.
4. The light conditioning member of claim 1, wherein:
light rays emitted to the spacing part of the grating structure at least partially exit through the light emergent area.
5. The light conditioning member of claim 2, wherein: the grating structure further comprises an optical medium layer, the optical medium layer is located below the film layer, and light rays are emitted to the grating structure, the reflector and the interval part of the grating structure through the optical medium layer.
6. The light conditioning member of claim 1, wherein: the outgoing light ray formed after being adjusted by the light adjusting member, which is mainly emitted toward the display panel through the light exit region, may be used as a light source of the display panel.
7. The light conditioning member of claim 1, wherein: the carrier also has a lower surface opposite the upper surface, and the reflector is formed at the lower surface of the carrier.
8. The light conditioning member of claim 1, wherein: the shape of the grating structure can be a quadrangle, a triangle or a cylindrical lens.
9. A light source module is characterized in that: the light adjusting component is positioned on the light emitting side of the backlight module, and light from the backlight module is emitted after the light adjusting component is adjusted.
10. The utility model provides a bore hole 3D display device, includes backlight unit, light adjusting member and display panel, and the regulation effect that the light that comes from backlight unit through light adjusting member forms emergent ray, emergent ray can regard as display panel's light source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110989247.0A CN113759567A (en) | 2021-08-26 | 2021-08-26 | Light adjusting member, light source module and naked eye 3D display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110989247.0A CN113759567A (en) | 2021-08-26 | 2021-08-26 | Light adjusting member, light source module and naked eye 3D display device |
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| CN113759567A true CN113759567A (en) | 2021-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115166994A (en) * | 2022-06-14 | 2022-10-11 | 北京邮电大学 | Three-dimensional display system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115166994A (en) * | 2022-06-14 | 2022-10-11 | 北京邮电大学 | Three-dimensional display system and method |
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