CN219303268U - Display device - Google Patents
Display device Download PDFInfo
- Publication number
- CN219303268U CN219303268U CN202320023524.7U CN202320023524U CN219303268U CN 219303268 U CN219303268 U CN 219303268U CN 202320023524 U CN202320023524 U CN 202320023524U CN 219303268 U CN219303268 U CN 219303268U
- Authority
- CN
- China
- Prior art keywords
- linear polarizer
- display panel
- polarization direction
- display
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000010287 polarization Effects 0.000 claims abstract description 62
- 238000001514 detection method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Images
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The utility model discloses a display device, which comprises a display panel, a light sensor, a first group of polarizing elements and a second group of polarizing elements. The display panel has a display side and a back side opposite to the display side. The light sensor is disposed on the back side of the display panel. The first group of polarizing elements are arranged on the back side of the display panel and between the display panel and the light sensor. The first group of polarizing elements comprises a first linear polarizer and a second linear polarizer arranged between the first linear polarizer and the display panel. The first linear polarizer has a first polarization direction. The second linear polarizer has a second polarization direction. The first polarization direction is substantially orthogonal to the second polarization direction. The second group of polarizing elements is arranged on the display side of the display panel. The second group of polarizing elements comprises a third linear polarizer and a first quarter-wave plate arranged between the third linear polarizer and the display panel.
Description
Technical Field
The present utility model relates to a display device, and more particularly, to a display device including a light sensor.
Background
Conventional display devices generally use a light sensor (sensor) to detect the amount of ambient light (hereinafter referred to as ambient light) from the environment surrounding the display device, and transmit the detected data to a processor, so that the display brightness of the display device can be adjusted according to the amount of ambient light when needed, thereby providing better image quality for users. However, when the light received by the light sensor is not only ambient light, the light sensor may not accurately detect the amount of ambient light, and it is difficult for the display device to accurately adjust the display brightness, resulting in problems such as reduced image quality and poor use experience.
Therefore, it is an object of continuous efforts of those skilled in the art how to propose a new display device to improve the foregoing problems.
Disclosure of Invention
An aspect of the present utility model proposes a display device. The display device includes a display panel, a light sensor, a first set of polarizing elements, and a second set of polarizing elements. The display panel has a display side and a back side opposite to the display side. The light sensor is disposed on the back side of the display panel. The first group of polarizing elements are arranged on the back side of the display panel and between the display panel and the light sensor. The first group of polarizing elements comprises a first linear polarizer and a second linear polarizer arranged between the first linear polarizer and the display panel. The first linear polarizer has a first polarization direction. The second linear polarizer has a second polarization direction. The first polarization direction is substantially orthogonal to the second polarization direction. The second group of polarizing elements is arranged on the display side of the display panel. The second group of polarizing elements comprises a third linear polarizer and a first quarter-wave plate arranged between the third linear polarizer and the display panel.
The display panel is an organic light emitting diode display panel.
The display device further comprises a processor electrically connected with the light sensor, wherein ambient light entering the display device from the outside is sequentially transmitted to the light sensor through the third linear polarizer, the first quarter-wave plate, the display panel, the second linear polarizer and the first linear polarizer to generate a sensing value, and the processor calculates the intensity of the ambient light according to the sensing value.
The third linear polarizer has a third polarization direction, and the third polarization direction is parallel to the second polarization direction.
Wherein the first linear polarizer is in direct contact with the second linear polarizer.
Wherein the first set of polarizing elements covers the light sensor.
The display panel further comprises a light-transmitting cover plate and a second quarter wave plate, wherein the light-transmitting cover plate and the second quarter wave plate are arranged on the display side of the display panel, and the second quarter wave plate is arranged between the light-transmitting cover plate and the second group of polarizing elements.
The third linear polarizer has a third polarization direction, and the third polarization direction is parallel to the first polarization direction.
Another aspect of the present utility model provides a display device. The display device includes a display panel, a light sensor, a first set of polarizing elements and a second quarter wave plate. The display panel has a display side and a back side opposite to the display side. The light sensor is disposed on the back side of the display panel. The first group of polarizing elements are arranged on the back side of the display panel and between the display panel and the light sensor. The first group of polarizing elements comprises a first linear polarizer and a second linear polarizer arranged between the first linear polarizer and the display panel. The first linear polarizer has a first polarization direction. The second linear polarizer has a second polarization direction. The first polarization direction is substantially orthogonal to the second polarization direction. The second group of polarizing elements are arranged on the display side of the display panel. The second group of polarizing elements comprises a third linear polarizer and a first quarter-wave plate arranged between the third linear polarizer and the display panel. The second group of polarizing elements is arranged between the second quarter wave plate and the display panel.
The display panel further comprises a light-transmitting cover plate arranged on the display side of the display panel, and the second quarter wave plate is arranged between the second group of polarizing elements and the light-transmitting cover plate.
According to the above embodiments, the display device provided by the present utility model improves the detection accuracy of the photosensor by arranging the polarizing element, so as to improve the above-mentioned existing problems.
For a better understanding of the above and other aspects of the utility model, reference will now be made in detail to the following examples, examples of which are illustrated in the accompanying drawings.
Drawings
Fig. 1 is a schematic cross-sectional view of a display device according to an embodiment of the utility model.
Fig. 2 is a schematic cross-sectional view of a display device according to another embodiment of the utility model.
Detailed Description
The utility model will be described in detail below with reference to the attached drawings and specific embodiments.
It should be noted that the present utility model does not show all possible embodiments, and that other embodiments not proposed by the present utility model may be applied. Moreover, the dimensional proportions in the drawings are not to scale in actual products. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense. In addition, descriptions of the embodiments, such as the details of the structures, the processing steps, the material applications, etc., are provided for illustration only and are not intended to limit the scope of the utility model. The steps and details of the structure of the embodiments may be varied and modified according to the actual manufacturing process without departing from the spirit and scope of the present utility model. The following description will be given with the same/similar symbols indicating the same/similar elements.
In this document, recitation of "first," "second," and the like, as referred to herein, is used for descriptive purposes only and is not to be interpreted to indicate or imply relative importance or order of manufacturing assembly, nor is it to be construed to imply that the required number of technical features are present.
Fig. 1 is a schematic cross-sectional view of a display device 10 according to an embodiment of the utility model. The display device 10 includes a display panel 101, a light sensor 102, a first set of polarizing elements 103, a second set of polarizing elements 104, and a processor or control circuit (not shown). The display panel 101 may be, for example, an organic light-emitting diode (OLED) display panel. The display panel 101 has a display side 101A for displaying an image and a back side 101B opposite to the display side 101A. The light sensor 102 is disposed on the back side 101B of the display panel 101. The processor or control circuit may be electrically connected to the light sensor 102. The light sensor 102 may detect light transmitted to the light sensor 102 and generate a sensing value corresponding to the received light, and the processor or the control circuit may be configured to receive the sensing value generated by the light sensor 102 and calculate a property of the light received by the light sensor 102 according to the sensing value, where the property of the light may be, for example, brightness, intensity, density, and the like of the light. The first set of polarizing elements 103 is disposed on the back side 101B of the display panel 101 and between the display panel 101 and the light sensor 102. The first set of polarizing elements 103 may cover the light sensor 102. In one embodiment, the light transmitted to the light sensor 102 passes through the first set of polarizing elements 103. The first group of polarizing elements 103 may include a first linear polarizer (linear polarizer) 131 and a second linear polarizer 132. The second linear polarizer 132 is disposed between the first linear polarizer 131 and the display panel 101. The first linear polarizer 131 has a first polarization direction, and the second linear polarizer 132 has a second polarization direction. The first polarization direction of the first linear polarizer 131 is substantially orthogonal to the second polarization direction of the second linear polarizer 132. In this embodiment, the first linear polarizer 131 may directly contact the second linear polarizer 132, but the utility model is not limited thereto, and the first linear polarizer 131 may not directly contact the second linear polarizer 132, for example, a space may be provided between the first linear polarizer 131 and the second linear polarizer 132. The second set of polarizing elements 104 is disposed on the display side 101A of the display panel 101. The second set of polarizing elements 104 may be part of an organic light emitting diode display screen assembly. The second set of polarizing elements 104 may include a third linear polarizer 141 and a first quarter wave plate (quarter-wave plate or quarterwave retarder) 142. The first quarter wave plate 142 is disposed between the third linear polarizer 141 and the display panel 101. The third linear polarizer 141 has a third polarization direction. In an embodiment, the third polarization direction of the third linear polarizer 141 may be parallel to the first polarization direction of the first linear polarizer 131 or the second polarization direction of the second linear polarizer 132. In another embodiment, the first polarization direction of the first linear polarizer 131, the second polarization direction of the second linear polarizer 132, and the third polarization direction of the third linear polarizer 141 may be different from each other.
In an embodiment, the ambient light 180 incident on the display device 10 from the outside may first pass through the third linear polarizer 141 to be converted from unpolarized light into linear polarized light having a third polarization direction, and then pass through the first quarter wave plate 142 to be converted into circularly polarized light, and the circularly polarized light may be sequentially transmitted to the light sensor 102 through the display panel 101, the second linear polarizer 132 and the first linear polarizer 131 to generate a sensing value, and the processor electrically connected to the light sensor 102 may calculate the intensity of the ambient light 180 according to the sensing value. The light from the display panel 101 may include light 181 emitted toward the first set of polarizing elements 103 and light 182 emitted toward the second set of polarizing elements 104. The light 181 from the display panel 101 is converted from unpolarized light to linearly polarized light having a second polarization direction by the second linear polarizer 132, and since the second polarization direction is orthogonal to the first polarization direction of the first linear polarizer 131, the linearly polarized light having the second polarization direction cannot pass through the first linear polarizer 131, and the light 181 from the display panel 101 cannot be transmitted to the light sensor 102. In practical applications, light from the display panel 101 may be partially scattered or reflected when penetrating the second set of polarizing elements 104, for example, the light 182 from the display panel 101 is transmitted to the third linear polarizer 141 through the first quarter-wave plate 142 and may be reflected by the third linear polarizer 141, and the reflected light sequentially passes through the first quarter-wave plate 142, the display panel 101 and the second linear polarizer 132, and is converted from unpolarized light into linear polarized light having the second polarization direction, and since the second polarization direction is orthogonal to the first polarization direction of the first linear polarizer 131, the linear polarized light having the second polarization direction cannot pass through the first linear polarizer 131, so that the light 182 from the display panel 101 cannot be transmitted to the light sensor 102 even if reflected. The first set of polarizing elements 103 and the second set of polarizing elements 104 can allow the ambient light 180 to pass to the light sensor 102 and can block the light from the display panel 101 from passing to the light sensor 102, so that the sensing value of the light sensor 102 to the ambient light is not interfered by the light from the display panel 101, and the detection accuracy of the light sensor can be effectively improved.
Fig. 2 is a schematic cross-sectional view of a display device 20 according to another embodiment of the utility model. The same or similar elements in the embodiment of fig. 2 as those in the embodiment of fig. 1 are denoted by the same or similar element numbers, and reference is made to the foregoing for description of the same or similar elements, which is not repeated here. The display device 20 includes a light-transmitting cover plate 209 disposed on the display side 101A of the display panel 101 and a second quarter-wave plate 243 disposed on the display side 101A of the display panel 101. The second quarter-wave plate 243 may be disposed under the light-transmitting cover plate 209.
In the display device 20, the second quarter-wave plate 243 and the display panel 101 are respectively disposed on two opposite sides of the second set of polarizing elements 104. The second quarter-wave plate 243 may be disposed between the second set of polarizing elements 104 and the transparent cover 209. The third linear polarizer 141 is disposed between the first quarter wave plate 142 and the second quarter wave plate 243. The second quarter-wave plate 243 may be disposed between the third linear polarizer 141 and the transparent cover 209.
In practical applications, the light from the display panel 101 may be partially scattered or reflected when penetrating through the transparent cover 209, in an embodiment, the ambient light 180 incident on the display device 20 from the outside may sequentially pass through the transparent cover 209, the second quarter-wave plate 243 and the third linear polarizer 141 to be converted from unpolarized light into linearly polarized light having the third polarization direction, and then converted into circularly polarized light by the first quarter-wave plate 142, and the circularly polarized light may sequentially pass through the display panel 101, the second linear polarizer 132 and the first linear polarizer 131 to be transmitted to the light sensor 102 to generate a sensing value, and the processor electrically connected to the light sensor 102 may calculate the intensity of the ambient light 180 according to the sensing value. The light 282 from the display panel 101 is transmitted toward the second set of polarizing elements 104. The light 282 from the display panel 101 sequentially passes through the first quarter wave plate 142 and the third linear polarizer 141, is converted from unpolarized light into linearly polarized light having a third polarization direction, the linearly polarized light having the third polarization direction passes through the second quarter wave plate 243 and is reflected by the light-transmitting cover plate 209, the reflected light is again converted into circularly polarized light by the second quarter wave plate 243, the circularly polarized light sequentially passes through the third linear polarizer 141 and the first quarter wave plate 142, the linearly polarized light having the third polarization direction is converted from circularly polarized light into linearly polarized light having the third polarization direction, the linearly polarized light having the third polarization direction is transmitted to the first group of polarizing elements 103 by the display panel 101, and the linearly polarized light having the third polarization direction cannot pass through the first group of polarizing elements 103 since the first polarization direction of the first linear polarizer 131 of the first group of polarizing elements 103 is substantially orthogonal to the second polarization direction of the second linear polarizer 132. So that light reflected by the light transmissive cover plate 209 (e.g., light 282 from the display panel 101) cannot pass to the light sensor 102. In this embodiment, the display device 20 may also include light from the display panel 101 reflected by the third linear polarizer 141 and/or light from the display panel 101 that travels toward the light sensor 102, which may be blocked in a manner similar to the light 181 and the light 182 of fig. 1 so as not to pass to the light sensor 102. The first set of polarizing elements 103, the second set of polarizing elements 104 and the second quarter wave plate 243 can allow the ambient light 180 to pass to the light sensor 102, and can block the light from the display panel 101 from passing to the light sensor 102, and can also block the light reflected by the transparent cover 209 from passing to the light sensor 102, so that the sensing value of the light sensor 102 to the ambient light is not interfered by the light from the display panel 101, and the detection accuracy of the light sensor can be effectively improved.
According to the embodiment, the display device provided by the utility model comprises a first group of polarizing elements and a second group of polarizing elements, wherein the first group of polarizing elements comprises two linear polarizers with polarization directions orthogonal to each other, and the second group of polarizing elements comprises a linear polarizer and a quarter wave plate. By the configuration, the ambient light and the non-ambient light can be effectively separated, and the non-ambient light is blocked from being transmitted to the light sensor, so that the problem that the sensing value generated by the light sensor cannot accurately correspond to the ambient light due to the non-ambient light is solved. Therefore, the display device can adjust the display brightness according to different ambient lights, the image quality can be improved, and the use experience of a user can be improved. In addition, the display device provided by the utility model can correct the sensing value of the ambient light without using a plurality of light sensors, and has simple and convenient structure and easy manufacture, maintenance and use.
In summary, although the present utility model has been described in terms of the above embodiments, it is not limited thereto. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present utility model. Accordingly, the scope of the utility model is defined by the appended claims.
Of course, the present utility model is capable of other various embodiments and its several details are capable of modification and variation in light of the present utility model by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A display device, comprising:
a display panel having a display side and a back side opposite to the display side;
a photosensor disposed on the back side of the display panel;
the first group of polarizing elements are arranged on the back side of the display panel and between the display panel and the light sensor, the first group of polarizing elements comprise a first linear polarizer and a second linear polarizer arranged between the first linear polarizer and the display panel, the first linear polarizer has a first polarization direction, the second linear polarizer has a second polarization direction, and the first polarization direction is approximately orthogonal to the second polarization direction; and
the second group of polarizing elements are arranged on the display side of the display panel and comprise a third linear polarizer and a first quarter wave plate arranged between the third linear polarizer and the display panel.
2. The display device of claim 1, wherein the display panel is an organic light emitting diode display panel.
3. The display device of claim 1, further comprising a processor electrically connected to the light sensor,
the processor calculates the intensity of the ambient light according to the sensing value by sequentially transmitting the ambient light entering the display device from the outside to the light sensor through the third linear polarizer, the first quarter-wave plate, the display panel, the second linear polarizer and the first linear polarizer.
4. The display device of claim 1, wherein the third linear polarizer has a third polarization direction, the third polarization direction being parallel to the second polarization direction.
5. The display device of claim 1, wherein the first linear polarizer directly contacts the second linear polarizer.
6. The display device of claim 1, wherein the first set of polarizing elements covers the light sensor.
7. The display device of claim 1, further comprising a light transmissive cover plate and a second quarter wave plate disposed on the display side of the display panel, the second quarter wave plate being disposed between the light transmissive cover plate and the second set of polarizing elements.
8. The display device of claim 1, wherein the third linear polarizer has a third polarization direction, the third polarization direction being parallel to the first polarization direction.
9. A display device, comprising:
a display panel having a display side and a back side opposite to the display side;
a photosensor disposed on the back side of the display panel;
the first group of polarizing elements are arranged on the back side of the display panel and between the display panel and the light sensor, the first group of polarizing elements comprise a first linear polarizer and a second linear polarizer arranged between the first linear polarizer and the display panel, the first linear polarizer has a first polarization direction, the second linear polarizer has a second polarization direction, and the first polarization direction is approximately orthogonal to the second polarization direction;
the second group of polarizing elements are arranged on the display side of the display panel and comprise a third linear polarizer and a first quarter wave plate arranged between the third linear polarizer and the display panel; and
the second group of polarizing elements is arranged between the second quarter wave plate and the display panel.
10. The display device of claim 9, further comprising a transparent cover plate disposed on the display side of the display panel, wherein the second quarter-wave plate is disposed between the second set of polarizing elements and the transparent cover plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320023524.7U CN219303268U (en) | 2023-01-05 | 2023-01-05 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320023524.7U CN219303268U (en) | 2023-01-05 | 2023-01-05 | Display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219303268U true CN219303268U (en) | 2023-07-04 |
Family
ID=86985341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320023524.7U Active CN219303268U (en) | 2023-01-05 | 2023-01-05 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219303268U (en) |
-
2023
- 2023-01-05 CN CN202320023524.7U patent/CN219303268U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3588024B1 (en) | Mobile terminal | |
| US9612152B2 (en) | Ambient light sensor with internal light cancellation | |
| KR101848541B1 (en) | Ultrasonic touch sensor with a display monitor | |
| CN111052140B (en) | Fingerprint identification device and electronic equipment | |
| CN114353937A (en) | Optical sensor and terminal equipment | |
| US20080111797A1 (en) | Touch screen | |
| JP2010287225A (en) | Touch input device | |
| CN112964359A (en) | Ambient light sensor and electronic equipment | |
| CN111968602B (en) | Display device, electronic apparatus, and control method of electronic apparatus | |
| US20220120609A1 (en) | Electronic device | |
| WO2019080778A1 (en) | Optical detection component and terminal device | |
| EP4162241A1 (en) | Ambient light sensing | |
| CN111988456A (en) | Display screen assembly, electronic device and ambient light detection method | |
| CN219303268U (en) | Display device | |
| CN111968599B (en) | Display device, electronic apparatus, and control method of electronic apparatus | |
| CN111968603B (en) | Display device, electronic apparatus, and control method of electronic apparatus | |
| JP2011003184A (en) | Touch type input device and electronic apparatus with same | |
| WO2018176920A1 (en) | Touch panel, touch control method thereof, and touch control apparatus | |
| US8217354B2 (en) | Remote sensing system and electronic apparatus having same | |
| US20080055495A1 (en) | LCD panel with synchronized integral touchscreen | |
| CN111968607A (en) | Display device, electronic apparatus, and control method of electronic apparatus | |
| CN114518813B (en) | Display screens and electronic devices | |
| CN110832503A (en) | Optical fingerprint device, electronic apparatus and method of measuring distance | |
| CN112379564A (en) | Three-dimensional imaging device and method based on TOF and electronic equipment | |
| JP2009198360A (en) | Optical touch panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |