CN108107623B - Display device - Google Patents
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- CN108107623B CN108107623B CN201711401320.8A CN201711401320A CN108107623B CN 108107623 B CN108107623 B CN 108107623B CN 201711401320 A CN201711401320 A CN 201711401320A CN 108107623 B CN108107623 B CN 108107623B
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- display panel
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- display device
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- 239000010410 layer Substances 0.000 claims description 82
- 239000004973 liquid crystal related substance Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 25
- 239000012790 adhesive layer Substances 0.000 claims description 7
- 230000000007 visual effect Effects 0.000 abstract description 10
- 229920001621 AMOLED Polymers 0.000 abstract description 8
- 210000002858 crystal cell Anatomy 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 102000009565 Lysosomal-Associated Membrane Protein 2 Human genes 0.000 description 1
- 108010009491 Lysosomal-Associated Membrane Protein 2 Proteins 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- 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
- G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/128—Active-matrix OLED [AMOLED] displays comprising two independent displays, e.g. for emitting information from two major sides of the display
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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)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a display device, which comprises a first display panel and a second display panel, wherein the first display panel is arranged on the second display panel, the first display panel is a transparent display panel, when the first display panel is started, the second display panel is powered off, and the display device is in a wide visual angle display mode; when the first display panel is closed and the second display panel is opened, the display device is in a narrow viewing angle display mode. The display device provided by the invention can realize free switching of wide and narrow viewing angles, can realize a narrow viewing angle range of +/-30 degrees, and can meet the use requirements of wide and narrow viewing angles of self-luminous display panels such as active matrix organic light emitting diode panels (AMOLED), organic screens (Micro LED) and the like.
Description
Technical Field
The present invention relates to the field of liquid crystal display technologies, and in particular, to a display device.
Background
With the continuous progress of the liquid crystal display technology, the viewing angle of the display has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information. Although the current display device gradually develops towards a wide viewing angle, no matter the application of the mobile terminal of the mobile phone, the desktop display or the notebook computer, besides the requirement of the wide viewing angle, in many occasions, the display device is required to have a function of switching between the wide viewing angle and the narrow viewing angle. At present, there are several ways to switch between a wide viewing angle and a narrow viewing angle of a liquid crystal display device.
The first method is realized by attaching a shutter film on a display screen. When peep-proof is needed, the view angle can be reduced by using the shutter shielding film to shield the screen. However, this method requires additional preparation of the louver films, which causes great inconvenience to the user, and one louver film can achieve only one viewing angle. Once the louver shielding film is attached, the visual angle is fixed, only the narrow visual angle mode can be realized, and the wide visual angle function can not be displayed.
The second is to arrange a dual light source backlight system in the lcd device for adjusting the viewing angle of the lcd device, the dual light source backlight system is composed of two stacked light guide plates combined with an inverse prism sheet, the top light guide plate (LGP-T) combined with the inverse prism sheet changes the direction of the light so that the light is limited in a relatively narrow angular range, thereby realizing the narrow viewing angle of the lcd device, while the bottom light guide plate (LGP-B) combined with the inverse prism sheet functions to realize the wide viewing angle of the lcd device. However, such a dual-light source backlight system increases the thickness and cost of the liquid crystal display device, and is not suitable for the trend of thinning the liquid crystal display device.
The third is to divide the driving electrodes on the panel of the liquid crystal display device into two types, one is the wide viewing angle display driving electrode, and the other is the viewing angle control electrode, when a proper voltage is applied to the viewing angle control electrode, the liquid crystal display device can generate proper light leakage, and further realize the switching between the wide viewing angle and the narrow viewing angle. However, the liquid crystal display device needs to be provided with two electrodes, namely a wide viewing angle display driving electrode and a viewing angle control electrode, so that the aperture ratio of the liquid crystal display device is reduced, the panel brightness of the liquid crystal display device is reduced, and the manufacturing process is more complicated.
And fourthly, arranging a double liquid crystal cell in the liquid crystal display device for adjusting the visual angle of the liquid crystal display device, wherein the double liquid crystal cell is composed of a top liquid crystal layer and a bottom liquid crystal layer which are vertically aligned, and switching between a wide visual angle and a narrow visual angle is realized by controlling the voltage applied to the two liquid crystal cells. However, two liquid crystal layers need to be disposed on the device, so that the cost of the liquid crystal display device is increased, the thickness and the power consumption are increased, and the development trend of the liquid crystal display device to be light and thin is not met.
In summary, the technology capable of switching between wide and narrow viewing angles is generally applicable to Liquid Crystal Displays (LCDs), and is not applicable to self-emitting display devices such as AMOLEDs and Micro LEDs. Therefore, there is a need to provide a new technical solution to overcome the above technical problems in the prior art.
Disclosure of Invention
In view of the above, the present invention is directed to a display device, so as to solve the technical problem that the self-emitting display device such as AMOLED in the prior art cannot realize free switching of wide and narrow viewing angles.
The present invention provides a display device including: the display device comprises a first display panel and a second display panel, wherein the first display panel is arranged on the second display panel, the first display panel is a transparent display panel, when the first display panel is opened, the second display panel is powered off, and the display device is in a wide viewing angle display mode; when the first display panel is closed and the second display panel is opened, the display device is in a narrow viewing angle display mode.
Further, the first display panel and the second display panel are both self-emitting display panels.
Further, the first display panel is a self-luminous display panel, and the second display panel is a liquid crystal display panel.
Further, the first display panel includes a first substrate, a first light-shielding layer, and a first light-emitting layer, the first light-emitting layer being disposed on the first substrate, the first light-shielding layer being stacked on the first light-emitting layer.
Further, the second display panel includes a second substrate, a second light shielding layer and a second light emitting layer, the second light shielding layer is disposed on the second substrate, the second light emitting layer is disposed on a side of the second substrate far away from the second light shielding layer, and the second light shielding layer and the second light emitting layer are disposed in a staggered manner.
Furthermore, an adhesive layer is arranged between the first display panel and the second display panel, and the first light shielding layer and the second light shielding layer are adhered to the adhesive layer to adhere the first display panel and the second display panel together.
Furthermore, the width of the first light shielding layer is a, the thickness of the second display panel is d, so that the second display panel does not leak light, and a is larger than or equal to d.
Furthermore, the width of the second light emitting layer is c, so that the display device can realize a narrow viewing angle range of +/-30 degrees, and c is less than or equal to 0.4 d.
Furthermore, a reflecting surface is arranged at the bottom of one side, close to the second substrate, of the second light shielding layer, and light rays emitted to the second light shielding layer are reflected by the reflecting surface and then are reused.
Further, a reflective surface is provided between the first light-shielding layer and the first light-emitting layer.
The display device provided by the invention is provided with the first display panel and the second display panel, and the first display panel is laminated on the second display panel. When the first display panel is started, the second display panel is powered off, light rays are emitted from the first display panel, and the display device is in a wide-view-angle display mode; when the first display panel is powered off, the second display panel is opened, light rays are emitted from the second display panel, emergent light with a large visual angle is shielded by the first shading layer, and the display device is in a narrow visual angle display mode. The display device can realize free switching of wide and narrow viewing angles, can realize a narrow viewing angle range of +/-30 degrees, and meets the use requirements of wide and narrow viewing angles of self-luminous display devices such as an active matrix organic light emitting diode panel (AMOLED), an organic screen (Micro LED) and the like.
Drawings
Fig. 1 is a schematic view of a display device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a display device according to a second embodiment of the present invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Fig. 1 is a schematic view of a display device according to an embodiment of the present invention. As shown in fig. 1, the present invention provides a display device 100, which includes a first display panel 10 and a second display panel 20. The first display panel 10 is stacked on the second display panel 20, and the first display panel 10 is a transparent display panel. When the first display panel 10 is turned on and the second display panel 20 is turned off, the display device 100 is in the wide viewing angle display mode; when the first display panel 10 is turned off and the second display panel 20 is turned on, the display device 100 is in the narrow viewing angle display mode.
In the present embodiment, the first display panel 10 and the second display panel 20 are self-emitting display panels, such as an organic light emitting diode display panel (OLED), but not limited thereto. The first display panel 10 includes a first substrate 110, a first light emitting layer 120, and a first light shielding layer 130, the first light emitting layer 120 is disposed on the first substrate 110, and the first light shielding layer 130 is stacked on the first light emitting layer 120. Specifically, the first light-emitting layer 120 includes a plurality of first light-emitting elements (not numbered) spaced apart from each other, and the first light-shielding layer 130 includes a plurality of first light-shielding portions (not numbered) spaced apart from each other, where the first light-shielding portions have the same width as the first light-emitting elements in the present embodiment, and each first light-shielding portion is disposed on each first light-emitting element in a stacked manner. The width of the first shading part is a, the width between two adjacent first shading parts is b, and the sum of a and b is the width of one sub-pixel.
The second display panel 20 includes a second substrate 210, a second light emitting layer 220 and a second light shielding layer 230, the second light shielding layer 230 is disposed on the second substrate 210 near the first substrate 110, and the second light shielding layer 230 is disposed opposite to the first light shielding layer 130. The second light emitting layer 220 is disposed on the second substrate 210 at a side far from the second light shielding layer 230, and the second light shielding layer 230 and the second light emitting layer 220 are disposed alternately. Preferably, an adhesive layer 30 may be disposed between the first display panel 10 and the second display panel 20, the first light shielding layer 130 and the second light shielding layer 230 are respectively adhered to the adhesive layer 30 to adhere the first display panel 10 and the second display panel 20 together, and the width a of the first light shielding layer 130 is equal to the length of the second light shielding layer 230. The adhesive layer 30 may be provided as a frame sticker, but is not limited thereto. In other embodiments, a full-paste approach may also be employed. After the first display panel 10 and the second display panel 20 are bonded together, the second light shielding layer 230 is located below the first light shielding layer 130, so that the projection of the second light emitting layer 220 on the first substrate 110 falls between two adjacent first light shielding portions, and light emitted by the second light emitting layer 220 can exit through the gap between the first light shielding layer 130 and the second light shielding layer 230. Specifically, the second light shielding layer 230 includes a plurality of second light shielding portions (not numbered) spaced apart from each other, and the second light emitting layer 220 includes a plurality of second light emitting elements (not numbered) spaced apart from each other, and a projection of the second light emitting element on the second substrate 210 is located between two adjacent second light shielding portions.
In this embodiment, in order to improve the light utilization efficiency, a reflective surface (not shown) is disposed between the first light-shielding portion and the first light-emitting element, and the light emitted from the first light-emitting element to the first light-shielding portion is reflected by the reflective surface and reused, so as to prevent the light emitted from the first light-emitting element to the first light-shielding portion from being directly absorbed by the first light-shielding portion and being unusable. Similarly, the bottom of the second light-shielding layer 230 near the second substrate 210 is provided with a reflective surface, so that the light emitted from the second light-emitting device to the second light-shielding layer 230 is reflected by the reflective surface and reused.
As shown in fig. 1, the width of the second light emitting element is c, and the thickness of the second display panel 20 is d. In order to prevent the second display panel 20 from light leakage and color mixing, that is, the light emitted from the second light emitting element in the second light shielding layer 230 cannot be emitted from the opening region of the adjacent pixel, i.e., a is not less than d. Specifically, as shown by the light ray a in fig. 1, when light enters the optically thinner medium from the optically denser medium, a total reflection phenomenon occurs when the incident angle θ increases to a certain degree. In this embodiment, the first substrate 110 and the second substrate 210 are both glass substrates, and the refractive index n thereof is 1.4. When the incident angle of the light ray a is greater than the critical angle of 45.6 °, total reflection occurs, that is, when the incident angle of the light ray a is greater than 45.6 °, the light ray cannot exit into the first display panel 10, that is, the light leakage phenomenon does not occur.
In addition, c ≦ 0.4d is required for the display device 100 to achieve a narrow viewing angle in the range of ± 30 °. From the law of refraction sin θ1/sinθ2When the refractive index n1 of the substrate is 1.4 and the refractive index n2 of the air is 1.0, the angle θ of the light emitted from the second display panel 20 is determined as n2/n12Not more than 30 DEG, theta1Less than or equal to 21 DEG, and tan theta1C/d, tan21 DEG ≦ c/d, i.e. c ≦ 0.4 d.
Fig. 2 is a schematic diagram of a display device according to a second embodiment of the present invention. As shown in fig. 2, the first display panel 10 in this embodiment is a self-emitting display panel, such as an organic light emitting diode display panel (OLED), and the structure thereof is the same as that of the above embodiment and will not be described again. The second display panel 20 is a Liquid Crystal Display (LCD) panel, and the structure of the second display panel 20 is similar to that of the conventional LCD panel, and is not described herein again. In this embodiment, in order to reuse the light emitted to the second light shielding layer 230 in the backlight, a reflective surface (not shown) is disposed on a side of the second light shielding layer 230 facing the backlight, so that the light emitted to the second light shielding layer 230 is reflected by the reflective surface and reused, thereby improving the utilization rate of the light. Meanwhile, in order to make the light emitted from the first light emitting element 120 of the self-luminous first display panel 10 exit toward the outside of the display panel, a reflective surface is disposed on the surface of the first light emitting element 120 contacting with the first light shielding layer 130, and the light emitted from the first light emitting element 120 toward the reflective surface is reflected by the reflective surface and exits the display device 100, so as to improve the utilization rate of the light.
In the display device 100 of the present invention, the first display panel 10 and the second display panel 20 are provided on the display device 100, and the first display panel 10 is stacked on the second display panel 20. When the first display panel 10 is turned on, the second display panel 20 is powered off, light is emitted from the first display panel 10, and the display device is in a wide viewing angle display mode; when the first display panel 10 is powered off, the second display panel 20 is turned on, light is emitted from the second display panel 20, the emergent light with a large viewing angle is shielded by the first light shielding layer 130, and the display device 100 is in a narrow viewing angle display mode, wherein the narrow viewing angle range is ± 30 °. The first display panel 10 is a self-luminous display panel, and the second display panel 20 can be a self-luminous display panel or a liquid crystal display panel, and the display device of the invention can realize free switching of wide and narrow viewing angles, and can meet the use requirements of the self-luminous display panel such as an active matrix organic light emitting diode panel (AMOLED), an organic screen (Micro LED) and other self-luminous display devices with wide and narrow viewing angles.
The display device and the embodiment of the present invention are explained by applying specific examples, and the above description of the embodiment is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope thereof, and in summary, the content of the present specification should not be construed as a limitation to the present invention, and the scope of the present invention should be subject to the appended claims.
Claims (8)
1. A display device, comprising: the display device comprises a first display panel and a second display panel, wherein the first display panel is arranged on the second display panel, the first display panel is a transparent display panel, when the first display panel is opened, the second display panel is powered off, and the display device is in a wide viewing angle display mode; when the first display panel is closed and the second display panel is opened, the display device is in a narrow viewing angle display mode; the first display panel comprises a first light shielding layer, the second display panel comprises a second substrate, a second light shielding layer and a second light emitting layer, the second light shielding layer is arranged on the second substrate, the second light emitting layer is arranged on one side, far away from the second light shielding layer, of the second substrate, and the second light shielding layer and the second light emitting layer are arranged in a staggered mode; the first shading layer and the second shading layer are arranged oppositely and have the same width; the width of the first shading layer is a, the thickness of the second display panel is d, so that the second display panel does not leak light, and a is larger than or equal to d.
2. The display device according to claim 1, wherein the first display panel and the second display panel are self-luminous display panels.
3. The display device according to claim 1, wherein the first display panel is a self-light emitting display panel, and the second display panel is a liquid crystal display panel.
4. The display device according to claim 2, wherein the first display panel further comprises a first substrate and a first light-emitting layer, the first light-emitting layer being provided over the first substrate, the first light-shielding layer being stacked over the first light-emitting layer.
5. The display device according to claim 4, wherein an adhesive layer is provided between the first display panel and the second display panel, and the first light shielding layer and the second light shielding layer are respectively adhered to the adhesive layer to adhere the first display panel and the second display panel together.
6. The display device according to claim 5, wherein the second light emitting layer has a width c such that the display device realizes a narrow viewing angle range of ± 30 °, c ≦ 0.4 d.
7. The display device according to claim 5, wherein a reflective surface is provided on a bottom portion of the second light shielding layer on a side close to the second substrate, and light directed to the second light shielding layer is reused after being reflected by the reflective surface.
8. The display device according to claim 7, wherein a reflective surface is provided between the first light-shielding layer and the first light-emitting layer.
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CN201711401320.8A CN108107623B (en) | 2017-12-22 | 2017-12-22 | Display device |
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CN110890028B (en) * | 2018-09-07 | 2021-09-28 | 深圳Tcl新技术有限公司 | Split type LED display panel and control method thereof |
CN111061098B (en) * | 2018-10-16 | 2022-09-09 | 群创光电股份有限公司 | Display device |
CN109638063B (en) * | 2019-01-15 | 2021-01-26 | 京东方科技集团股份有限公司 | Display device, display method, and method for manufacturing display device |
CN111190296A (en) * | 2020-02-25 | 2020-05-22 | 深圳市隆利科技股份有限公司 | Peep-proof method for display |
CN113658518B (en) * | 2021-08-24 | 2023-07-04 | 京东方科技集团股份有限公司 | Display panel, preparation method thereof and display device |
CN116709824B (en) * | 2023-03-31 | 2024-04-16 | 惠科股份有限公司 | Display panel and display device |
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CN1661421A (en) * | 2004-02-26 | 2005-08-31 | 精工爱普生株式会社 | Viewing angle control element, method of manufacturing the same, liquid crystal display device, and electronic apparatus |
CN106154661A (en) * | 2016-09-21 | 2016-11-23 | 京东方科技集团股份有限公司 | A kind of transparent display panel and preparation method thereof, transparent display |
CN106707533A (en) * | 2017-03-24 | 2017-05-24 | 京东方科技集团股份有限公司 | Three-dimensional display device |
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JPH1012380A (en) * | 1996-06-25 | 1998-01-16 | Idemitsu Kosan Co Ltd | Multicolor light emission device and its manufacture |
KR101773087B1 (en) * | 2011-06-17 | 2017-08-31 | 삼성디스플레이 주식회사 | Organic light-emitting display device employing black matrix-containing neutral density film |
CN104658437A (en) * | 2015-03-17 | 2015-05-27 | 京东方科技集团股份有限公司 | Display panel and display device |
CN106707583A (en) * | 2016-12-28 | 2017-05-24 | 武汉华星光电技术有限公司 | Display device |
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CN1661421A (en) * | 2004-02-26 | 2005-08-31 | 精工爱普生株式会社 | Viewing angle control element, method of manufacturing the same, liquid crystal display device, and electronic apparatus |
CN106154661A (en) * | 2016-09-21 | 2016-11-23 | 京东方科技集团股份有限公司 | A kind of transparent display panel and preparation method thereof, transparent display |
CN106707533A (en) * | 2017-03-24 | 2017-05-24 | 京东方科技集团股份有限公司 | Three-dimensional display device |
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Address after: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant after: InfoVision Optoelectronics(Kunshan)Co.,Ltd. Address before: 215301, 1, Longteng Road, Kunshan, Jiangsu, Suzhou Applicant before: INFOVISION OPTOELECTRONICS (KUNSHAN) Co.,Ltd. |
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