CN217587777U - Three-dimensional display - Google Patents
Three-dimensional display Download PDFInfo
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- CN217587777U CN217587777U CN202221867003.1U CN202221867003U CN217587777U CN 217587777 U CN217587777 U CN 217587777U CN 202221867003 U CN202221867003 U CN 202221867003U CN 217587777 U CN217587777 U CN 217587777U
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Abstract
The utility model provides a stereoscopic display includes pixel array substrate, subtend base plate, space light modulation layer, first holographic layer, second holographic layer, first electrode layer, second electrode layer and preceding optical module. The pixel array substrate is provided with a plurality of pixel electrodes. The spatial light modulation layer is arranged between the pixel array substrate and the opposite substrate. The first hologram layer is disposed between the spatial light modulation layer and the pixel array substrate. The second hologram layer is disposed between the first hologram layer and the pixel array substrate. The first electrode layer and the second electrode layer are arranged between the first holographic layer and the second holographic layer and are electrically independent of each other. The first electrode layer contacts the first hologram layer. The second electrode layer contacts the second hologram layer. The front light module is arranged on one side of the pixel array substrate, which is far away from the second holographic layer, and is suitable for emitting laser beams towards the space light modulation layer.
Description
Technical Field
The utility model relates to a display especially relates to a stereoscopic display.
Background
In recent years, with the continuous progress of display technology, the requirements of users on the display quality (such as image resolution, color saturation, etc.) of the display are also increasing. However, in addition to high image resolution and high color saturation, in order to meet the user's demand for viewing real images, displays capable of displaying stereoscopic images have also been developed. In general, the stereoscopic imaging technology can be classified into a holographic type (holographic type), a multiplanar type, and a paired stereoscopic image type (parallel images). The holographic technology adopts the object light field reconstruction mode to realize the three-dimensional display, so that the stereoscopic display has a relatively real three-dimensional display effect, and a viewer can not feel dizzy or uncomfortable when viewing. However, most of these stereoscopic display devices require a strong light source and a corresponding optical system, which results in a large size and limits the feasibility of applications in mobile devices (e.g., notebook computers, tablet computers or smart phones).
SUMMERY OF THE UTILITY MODEL
The utility model provides a three-dimensional display, its three-dimensional luminance preferred and whole outward appearance that shows are also comparatively frivolous.
The utility model discloses a stereoscopic display, including pixel array substrate, subtend base plate, space light modulation layer, first holographic layer, second holographic layer, first electrode layer, second electrode layer and preceding optical module. The pixel array substrate is provided with a plurality of pixel electrodes. The opposite substrate is arranged opposite to the pixel array substrate. The spatial light modulation layer is arranged between the pixel array substrate and the opposite substrate. The first hologram layer is arranged between the spatial light modulation layer and the pixel array substrate. The second holographic layer is arranged between the first holographic layer and the pixel array substrate. The first electrode layer and the second electrode layer are arranged between the first holographic layer and the second holographic layer and are electrically independent of each other. The first electrode layer contacts the first hologram layer. The second electrode layer contacts the second hologram layer. The front light module is arranged on one side of the pixel array substrate, which is far away from the second holographic layer, and is suitable for emitting laser beams towards the spatial light modulation layer.
Based on the above, in the stereoscopic display according to an embodiment of the present invention, the spatial light modulation layer is utilized to modulate the phase of the laser beam emitted by the front optical module, so that the laser beam can generate a stereoscopic image after passing through the hologram layer. Since the front light module uses the laser light source for illumination, the front light module has the characteristics of high brightness, high monochromaticity, narrow spectral bandwidth and small light beam divergence angle, and the required configuration space is small, thereby being beneficial to thinning the stereoscopic display.
In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic cross-sectional view of a stereoscopic display according to a first embodiment of the invention;
fig. 2 is a schematic cross-sectional view of a stereoscopic display according to a second embodiment of the invention;
fig. 3 is a schematic cross-sectional view of a stereoscopic display according to a third embodiment of the present invention.
Description of the reference numerals
10. 10A, 20: a stereoscopic display;
110: a pixel array substrate;
115: a pixel electrode;
120: an opposite substrate;
130: a spatial light modulation layer;
151. 151A: a first hologram layer;
152: a second hologram layer;
161: a first electrode layer;
162: a second electrode layer;
170: an insulating layer;
180: an auxiliary lens layer;
190: a field lens;
200. 200A: a front light module;
210: a light guide plate;
210es: a light-emitting surface;
210is: a light incident surface;
220: a laser source;
240: a diffusion plate;
260: a piezoelectric film;
300: electrically controlling the liquid crystal box;
301. 302: a substrate;
310: a liquid crystal layer;
AX: a displacement axis;
LB: a laser beam;
MX: a movable shaft;
PA: a pixel region;
and (3) USR: a user.
Detailed Description
Fig. 1 is a schematic cross-sectional view of a stereoscopic display according to a first embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of a stereoscopic display according to a second embodiment of the present invention. Referring to fig. 1, the stereoscopic display 10 includes a pixel array substrate 110, an opposite substrate 120, a spatial light modulation layer 130, a first hologram layer 151, a second hologram layer 152, a first electrode layer 161, a second electrode layer 162, and a front light module 200.
The pixel array substrate 110 and the opposite substrate 120 are disposed opposite to each other. The spatial light modulation layer 130 is disposed between the pixel array substrate 110 and the opposite substrate 120. The first hologram layer 151 is disposed between the spatial light modulation layer 130 and the pixel array substrate 110. The second hologram layer 152 is disposed between the first hologram layer 151 and the pixel array substrate 110. The first electrode layer 161 and the second electrode layer 162 are disposed between the first hologram layer 151 and the second hologram layer 152. The first electrode layer 161 and the second electrode layer 162 are electrically contacted with the first hologram layer 151 and the second hologram layer 152, respectively, and are electrically independent from each other. For example, an insulating layer 170 may be disposed between the first electrode layer 161 and the second electrode layer 162.
In the present embodiment, the spatial light modulation layer 130 is, for example, a liquid crystal layer, and the pixel array substrate 110 is provided with a plurality of pixel electrodes 115. The pixel electrodes 115 are arranged in an array on the pixel array substrate 110. Correspondingly, an electrode layer (not shown) may be disposed on the opposite substrate 120, and an electric field formed between the electrode layer and the pixel electrode 115 is used to drive the spatial light modulation layer 130. More specifically, the pixel electrodes 115 define a plurality of pixel areas PA of the spatial light modulation layer 130, and each pixel electrode 115 is used for individually controlling the phase retardation (e.g. the orientation of liquid crystal molecules) of a portion of the spatial light modulation layer 130 in the corresponding pixel area PA.
In this embodiment, the pixel electrode 115, the first electrode layer 161, and the second electrode layer 162 are, for example, light-transmissive electrodes, and the material of the light-transmissive electrodes includes metal oxides, for example: indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, or other suitable oxide, or a stack of at least two of the foregoing. In order to reflect the light from the spatial light modulation layer 130, the electrode layer disposed on the opposite substrate 120 is, for example, a reflective electrode, and the material of the reflective electrode includes a metal, an alloy, a nitride of a metal material, an oxide of a metal material, an oxynitride of a metal material, or other suitable materials, or a stacked layer of a metal material and other conductive materials.
In the present embodiment, the materials of the first and second hologram layers 151 and 152 may include a photosensitive material or an emulsion material (e.g., a silver halide emulsion). For example, the first hologram layer 151 and the second hologram layer 152 each generate a corresponding charge distribution under the irradiation of light, and the information of the charge distribution can be transmitted to the pixel array substrate 110 through the first electrode layer 161 or the second electrode layer 162. The first electrode layer 161 and the second electrode layer 162 may each have a plurality of conductive patterns structurally separated from each other. That is, each of the first electrode layer 161 and the second electrode layer 162 is, for example, a patterned electrode layer. These conductive patterns can record the charge distribution of the hologram layer under light irradiation.
Specifically, in the present embodiment, the pixel array substrate 110 may adjust the electric potentials of the plurality of pixel electrodes 115 according to the electric charge distribution of the first hologram layer 151 and/or the second hologram layer 152, so that the spatial light modulation layer 130 has a corresponding phase retardation distribution. However, the present invention is not limited thereto. According to other embodiments, which are not shown, the charge distribution information generated by the hologram layer can also be transmitted to an external storage element via the first electrode layer 161 or the second electrode layer 162 for storage.
Further, the front light module 200 is disposed on a side of the pixel array substrate 110 facing away from the second hologram layer 152, and includes a light guide plate 210 and a laser light source 220. The light guide plate 210 has a light emitting surface 210es facing the pixel array substrate 110 and a light incident surface 210is connected to the light emitting surface 210 es. The laser source 220 is disposed at one side of the light incident surface 210is of the light guide plate 210 and adapted to emit a laser beam LB toward the light incident surface 210is of the light guide plate 210. In the present embodiment, the laser source 220 is formed by a plurality of laser diode elements (not shown) adapted to emit laser beams LB of different colors (for example, red, green and blue, but not limited thereto), respectively.
In order to improve the uniformity of the output light of the laser beam LB, the front light module 200 may further include a diffuser 240. The diffusion plate 240 is disposed between the laser light source 220 and the light guide plate 210, and is positioned on a transmission path of the laser beam LB. For example, the diffusion plate 240 is adapted to move back and forth along the movement axis MX to increase the dodging effect of the diffusion plate 240 on the laser beam LB. However, the present invention is not limited thereto. Referring to fig. 2, in another embodiment, the front light module 200A of the stereoscopic display 10A further optionally includes a piezoelectric film 260 disposed between the laser source 220 and the light guide plate 210 and located on the transmission path of the laser beam LB. For example, the piezoelectric film 260 is adapted to be displaced along the displacement axis AX by an alternating voltage, and the axial direction of the displacement axis AX may intersect with the axial direction of the moving axis MX of the diffuser 240. Accordingly, the problem of flare of the laser source 220 can be effectively improved.
With reference to fig. 1, since the front light module 200 uses the laser source 220 for illumination, the required configuration space is small in addition to the characteristics of high brightness, high monochromaticity, narrow spectral bandwidth and small light beam divergence angle, which is helpful for thinning the stereoscopic display 10.
Further, the laser beam LB may be emitted toward the spatial light modulation layer 130 through the light emitting surface 210es of the light guide plate 210 after being laterally transmitted in the light guide plate 210. The laser beam LB forms a first electric charge distribution and a second electric charge distribution on the first hologram layer 151 and the second hologram layer 152, respectively, after passing through the first hologram layer 151 and the second hologram layer 152 via reflection of the spatial light modulation layer 130. The first and second charge distributions may be transferred to the pixel array substrate 110 via the first and second electrode layers 161 and 162, respectively. The pixel array substrate 110 adjusts the potentials of the plurality of pixel electrodes 115 according to the first charge distribution and the second charge distribution, so that the liquid crystal layer serving as the spatial light modulation layer 130 has a corresponding phase retardation distribution.
The laser beam LB forms a stereoscopic light field on a side of the front light module 200 away from the pixel array substrate 110 after being phase-modulated by the spatial light modulation layer 130 having the phase retardation distribution and passing through two hologram layers, so that the user USR can view a stereoscopic image.
Fig. 3 is a schematic cross-sectional view of a stereoscopic display according to a third embodiment of the present invention. Referring to fig. 3, different from the stereoscopic display 10 of fig. 1, the stereoscopic display 20 of the present embodiment further optionally includes an auxiliary lens layer 180, a field lens 190, and an electrically controlled liquid crystal cell 300, and the first hologram layer 151A is, for example, a diffractive optical element layer. In the present embodiment, the auxiliary lens layer 180 is disposed between the pixel array substrate 110 and the second hologram layer 152, and the field lens 190 is disposed on a side of the front light module 200 facing away from the pixel array substrate 110. By the arrangement of the auxiliary lens layer 180 and the field lens 190, a field range in which the user USR views a stereoscopic image can be increased. For example, the auxiliary lens layer 180 may be a plurality of microlens arrays for enhancing the light field forming the stereoscopic image, and the field lens 190 may be used for reconstructing the holographic image in the observation area of the human eye.
Further, the electrically controlled liquid crystal cell 300 disposed between the pixel array substrate 110 and the front light module 200 is, for example, a liquid crystal display panel, and may include a substrate 301, a substrate 302, and a liquid crystal layer 310 sandwiched between the two substrates. For example, in the present embodiment, the stereoscopic display 20 may input a depth signal and a brightness signal for reconstructing a light field to the spatial light modulation layer 130 via a controller (not shown) to perform phase modulation on an incident laser beam (not shown). After the phase-modulated laser beam passes through the first hologram layer 151A, an electric charge distribution is formed on the second hologram layer 152. The charge distribution can be transmitted to the electrically controlled liquid crystal cell 300 through the second electrode layer 162, and the phase retardation distribution of the liquid crystal layer 310 can be adjusted according to the charge distribution. The laser beam LB forms a stereoscopic light field on one side of the user USR after being phase-modulated by the liquid crystal layer 310 having the phase retardation distribution.
However, the present invention is not limited thereto. In another variant, the stereoscopic display 20 can also be operated in a manner similar to that of the embodiment of fig. 1. That is, the charge distribution generated by the hologram layer may also be recorded and transmitted to the pixel array substrate 110, and the pixel array substrate 110 adjusts the potentials of the plurality of pixel electrodes 115 according to the charge distribution so that the liquid crystal layer as the spatial light modulation layer 130 has a corresponding phase retardation distribution. The laser beam LB forms a stereoscopic light field on a side of the front light module 200 away from the pixel array substrate 110 after being phase-modulated by the spatial light modulation layer 130 having the phase retardation distribution and passing through two hologram layers, so that the user USR can view a stereoscopic image. At this time, the electrically controlled liquid crystal cell 300 disposed between the front light module 200 and the pixel array substrate 110 can be used as another display layer to increase the visual effect of the stereoscopic image.
On the other hand, when the electrically controlled liquid crystal cell 300 is used as another display layer, the electrically controlled liquid crystal cell 300 may also be replaced by an Organic Light Emitting Diode (OLED) display panel or a micro-LED display panel, which is not limited by the present invention.
In summary, in the stereoscopic display according to an embodiment of the present invention, the spatial light modulation layer is used to modulate the phase of the laser beam emitted by the front light module, so that the laser beam can generate a stereoscopic image after passing through the hologram layer. Since the front light module illuminates by using a laser light source, the front light module has the characteristics of high brightness, high monochromaticity, narrow spectral bandwidth and small light beam divergence angle, and requires a small configuration space, which contributes to the thinning of the stereoscopic display.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.
Claims (9)
1. A stereoscopic display, comprising:
the pixel array substrate is provided with a plurality of pixel electrodes;
an opposite substrate arranged opposite to the pixel array substrate;
a spatial light modulation layer disposed between the pixel array substrate and the opposite substrate;
the first holographic layer is arranged between the spatial light modulation layer and the pixel array substrate;
the second holographic layer is arranged between the first holographic layer and the pixel array substrate;
the first electrode layer is in contact with the first holographic layer, and the second electrode layer is in contact with the second holographic layer; and
and the front light module is arranged on one side of the pixel array substrate, which is deviated from the second holographic layer, and is suitable for emitting laser beams towards the spatial light modulation layer.
2. The stereoscopic display of claim 1, wherein the front light module comprises a light guide plate and a laser source, the light guide plate has a light exit surface and a light entrance surface connected to the light exit surface, the laser source is disposed at one side of the light entrance surface of the light guide plate and adapted to emit the laser beam toward the light entrance surface, and the pixel array substrate is disposed at one side of the light exit surface of the light guide plate.
3. The stereoscopic display of claim 2, wherein the front light module further comprises a diffuser plate disposed on a transmission path of the laser beam and between the laser source and the light guide plate.
4. The stereoscopic display of claim 3, wherein the front light module further comprises a piezoelectric film disposed on a transmission path of the laser beam and between the laser source and the light guide plate, the piezoelectric film is adapted to be displaced along a displacement axis by an alternating voltage, the diffuser plate is adapted to move back and forth along a movement axis, and an axial direction of the displacement axis intersects with an axial direction of the movement axis.
5. The stereoscopic display according to claim 1, wherein the laser beam forms a first charge distribution and a second charge distribution on the first hologram layer and the second hologram layer, respectively, after being reflected by the spatial light modulation layer and passing through the first hologram layer and the second hologram layer, the pixel array substrate performs potential adjustment of the plurality of pixel electrodes according to the first charge distribution and the second charge distribution to make the spatial light modulation layer have a phase retardation distribution, and the laser beam forms a stereoscopic image light field after being phase-modulated by the spatial light modulation layer having the phase retardation distribution.
6. The stereoscopic display of claim 1, further comprising:
and the liquid crystal layer is arranged between the pixel array substrate and the front light module, wherein the first holographic layer is a diffraction optical element layer.
7. The stereoscopic display of claim 6, wherein the laser beam forms a charge distribution on the second hologram layer after being reflected by the spatial light modulation layer and passing through the diffractive optical element layer, the pixel array substrate adjusts the potentials of the plurality of pixel electrodes according to the charge distribution on the second hologram layer to make the spatial light modulation layer have a phase delay distribution, and the laser beam forms a stereoscopic image light field after being phase-modulated by the spatial light modulation layer having the phase delay distribution.
8. The stereoscopic display of claim 6, further comprising an auxiliary lens layer disposed between the pixel array substrate and the second hologram layer.
9. The stereoscopic display of claim 1, further comprising a field lens disposed on a side of the front light module facing away from the pixel array substrate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW111206590 | 2022-06-22 | ||
| TW111206590U TWM631657U (en) | 2022-06-22 | 2022-06-22 | Stereoscopic display apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217587777U true CN217587777U (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221867003.1U Active CN217587777U (en) | 2022-06-22 | 2022-07-19 | Three-dimensional display |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN217587777U (en) |
| TW (1) | TWM631657U (en) |
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2022
- 2022-06-22 TW TW111206590U patent/TWM631657U/en unknown
- 2022-07-19 CN CN202221867003.1U patent/CN217587777U/en active Active
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| TWM631657U (en) | 2022-09-01 |
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