CN112420780B - Display device, photosensitive assembly and electronic equipment - Google Patents
Display device, photosensitive assembly and electronic equipment Download PDFInfo
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- CN112420780B CN112420780B CN202011174463.1A CN202011174463A CN112420780B CN 112420780 B CN112420780 B CN 112420780B CN 202011174463 A CN202011174463 A CN 202011174463A CN 112420780 B CN112420780 B CN 112420780B
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- light
- display panel
- display
- beam splitter
- display device
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- 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
- H10K59/40—OLEDs integrated with touch screens
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
-
- 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
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
Abstract
The application discloses a display device, comprising: the display panel, the photosensitive component and the spectroscope; the display panel comprises a display surface and a non-display surface which are opposite; the photosensitive component is arranged on one side of the non-display surface of the display panel and can sense incident light rays from the direction of the display panel; the spectroscope is arranged between the display panel and the photosensitive component and is inclined to the non-display surface. By the mode, the application can reduce the problem of uneven brightness of the display panel.
Description
Technical Field
The present application relates to the field of display, and in particular, to a display device, a photosensitive assembly, and an electronic apparatus.
Background
With the development of electronic technology, fingerprint recognition technology has been widely applied to various electronic devices. Among them, the under-screen fingerprint recognition (Finger on Display, FOD) is a technology that provides a fingerprint recognition function while not reducing the effective display area of the display panel. The fingerprint identification under the screen mainly adopts a photosensitive fingerprint identification technology, namely, light rays emitted from the display panel are reflected on the surface of the finger, and the light rays reflected on the surface of the finger penetrate through the display panel and are received by the fingerprint identification device. The fingerprint identification device can generate different identification information according to the difference of the reflection of the light rays by the grain and the ridge of the finger grain, so that different fingerprint information can be identified.
In the long-term research and development process, the inventor of the application finds that the light irradiated to the fingerprint identification device can be reflected to the display panel by the fingerprint identification device, so that the normal operation of part of elements in the display panel is affected, and the brightness of the display panel is uneven.
Disclosure of Invention
The application mainly solves the technical problem of providing a display device, a photosensitive assembly and electronic equipment, and can reduce the problem of uneven brightness of a display panel.
In order to solve the technical problems, the application adopts a technical scheme that: provided is a display device including: the display panel, the photosensitive component and the spectroscope; the display panel comprises a display surface and a non-display surface which are opposite; the photosensitive component is arranged on one side of the non-display surface of the display panel and can sense incident light rays from the direction of the display panel; the spectroscope is arranged between the display panel and the photosensitive component and is inclined to the non-display surface.
Wherein the display device further comprises: a light absorbing frame; the light absorption frame is positioned between the display panel and the photosensitive component and positioned at the side edge of the spectroscope; wherein the beam splitter is configured to reflect light generated therefrom to the light-absorbing bezel.
The beam splitter is configured such that the intensity of the incident light from the display panel is reduced to less than 20% of the incident light after the incident light passes through the beam splitter, is reflected back from the photosensitive element, and passes through the beam splitter again.
Wherein the included angle between the beam splitter and the non-display surface is between 40 degrees and 60 degrees, and the height and position of the light absorption frame are configured to receive all reflected light rays from the beam splitter.
The number of the light absorption frames is at least two, and the light absorption frames are positioned on two opposite sides of the spectroscope and perpendicular to the non-display surface.
Wherein the number of the spectroscopes is two; the two spectroscopes are arranged in parallel, and the orthographic projections of the two spectroscopes on the non-display surface are completely overlapped; or the two spectroscopes are arranged obliquely with each other, and the orthographic projections of the two spectroscopes on the non-display surface are not overlapped at all.
When the two spectroscopes are arranged obliquely, a shading film is arranged between the two spectroscopes.
Wherein the display device further comprises: the light-shielding layer is arranged on the non-display surface of the display panel, is provided with an opening, and is positioned in the orthographic projection area of the photosensitive assembly on the display panel; the display panel comprises a circuit layer and a light-emitting layer which are arranged in a stacked mode, the light-emitting layer is located on one side, facing the display surface, of the circuit layer, and the circuit layer covers the light-shielding hole.
In order to solve the technical problems, the application adopts another technical scheme that: there is provided a photosensitive assembly comprising: a photosensitive element and a spectroscope; the photosensitive element is arranged on one side of the non-display surface of the display panel and can sense incident light from the direction of the display panel; the spectroscope is positioned at one side of the photosensitive element facing the display panel and is inclined to the photosensitive element.
In order to solve the technical problems, the application adopts another technical scheme that: an electronic device is provided, which comprises the display device or the photosensitive component and a driving circuit, wherein the driving circuit is electrically connected with the display panel and is used for driving the display panel.
The beneficial effects of the application are as follows: the present application provides a display device, which includes: the display device comprises a display panel, a photosensitive assembly and a spectroscope. The spectroscope is arranged between the display panel and the photosensitive component and is inclined to the non-display surface. The light rays illuminating the beam splitter are dispersed into a plurality of differently directed light beams. Therefore, when the light irradiated to the photosensitive assembly from the display panel passes through the spectroscope, a part of the light is redirected and is not irradiated to the photosensitive assembly, that is, the light irradiated to the photosensitive assembly is reduced, and the reflected light of the photosensitive assembly is correspondingly reduced. Meanwhile, the light reflected by the photosensitive component and irradiated to the display panel passes through the spectroscope, and part of the light is changed in direction and does not irradiate the display panel. In conclusion, the spectroscope can effectively reduce the light reflected by the photosensitive component to the display panel, reduce the influence of the light reflected by the photosensitive component on the display panel, and further improve the problem of uneven brightness of the display panel.
Drawings
Fig. 1 is a schematic structural view of a display device according to an embodiment of the present application;
FIG. 2 is a schematic view of the light propagation path in a beam splitter according to an embodiment of the application;
FIG. 3 is a schematic view of a beam splitter according to an embodiment of the present application;
FIG. 4 is a schematic view of a beam splitter according to another embodiment of the present application;
FIG. 5 is a schematic view of a photosensitive assembly according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and effects of the present application clearer and more specific, the present application will be described in further detail below with reference to the accompanying drawings and examples.
In order to solve the problem of uneven brightness (Mura) of a display panel caused by light emitted by a photosensitive assembly, the application provides a display device, which comprises the display panel, the photosensitive assembly and a spectroscope; the display panel comprises a display surface and a non-display surface which are opposite; the photosensitive component is arranged on one side of the non-display surface of the display panel and can sense incident light rays from the direction of the display panel; the spectroscope is arranged between the display panel and the photosensitive component and is inclined to the non-display surface. The display device disclosed by the application can be used for various display modes, such as LED display, OLED display or Micro-LED display. The OLED display is described here as an example, but is not limited to this display mode. The details are set forth below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device according to an embodiment of the application. The display device 10 includes a display panel 100, a photosensitive member 200, and a spectroscope 300.
The display panel 100 includes a display surface a and a non-display surface b that are opposite to each other. As the name suggests, the display surface a refers to the surface of the display panel 100 for displaying, and the non-display surface b faces back to the display surface a.
The photosensitive assembly 200 is disposed on the non-display surface b side of the display panel 100, and the photosensitive assembly 200 is capable of sensing incident light from the display panel 100. The incident light from the direction of the display panel 100 may refer to the light emitted by the display panel 100 and directed to the photosensitive assembly 200, the light emitted by the display panel 100 after being reflected and directed to the photosensitive assembly 200, or any other incident light irradiated to the display panel 100.
Specifically, the photosensitive surface of the photosensitive assembly 200 faces the display panel 100. The photosensitive component 200 may be any component that senses light, including but not limited to an optical fingerprint recognition device, a camera, an infrared light sensor, or a proximity light sensor. For example, the photosensitive assembly 200 may be an optical fingerprint recognition device, and the display panel 100 emits light from the display surface a, the light is reflected on the surface of the finger, and the light reflected on the surface of the finger is received by the optical fingerprint recognition device through the display panel 100. The optical fingerprint identification device can identify different fingerprint information according to the difference of reflection of the fingerprint grain and the ridge in the fingerprint grain.
The beam splitter 300 is disposed between the display panel 100 and the photosensitive element 200 and is inclined to the non-display surface b. The beam splitter 300 may refer to a device capable of splitting light into at least two light beams of different directions. The light is split into a transmitted beam and a reflected beam by the beam splitter 300 as it passes through the beam splitter 300. Wherein the propagation direction of the reflected beam is changed and no longer propagates in the direction of the original light, thereby reducing the light intensity in the original direction.
The light rays directed to beam splitter 300 are dispersed into a plurality of differently directed light beams. Thus, when the light from the display panel 100 to the photosensitive element 200 passes through the beam splitter 300, a portion of the light is redirected from the light to the photosensitive element 200, i.e., the light to the photosensitive element 200 is reduced, and the reflected light from the photosensitive element 200 is correspondingly reduced. Meanwhile, the light reflected by the photosensitive assembly 200 and irradiated to the display panel 100 is also partially redirected by the light passing through the beam splitter 300 and is no longer irradiated to the display panel 100. In summary, the beam splitter 300 can effectively reduce the light reflected by the photosensitive element 200 to the display panel 100, reduce the influence of the light reflected by the photosensitive element 200 on the display panel 100, and further improve the problem of uneven brightness of the display panel 100.
Referring to fig. 2, fig. 2 is a schematic diagram of a light propagation path in a beam splitter according to an embodiment of the application.
In one embodiment, the beam splitter 300 is configured such that the intensity of the incident light from the display panel 100 is reduced to less than 20% of the incident light after the incident light passes through the beam splitter 300, is reflected back from the photosensitive element 200, and passes through the beam splitter 300 again. The beam splitter 300 can reflect and transmit light, and the light intensity reflected by the photosensitive assembly 200 can be reduced by adjusting the transmittance of the beam splitter 300. Specifically, when the transmittance of the beam splitter 300 is a%, the original beam intensity meter is 100%, when the original beam irradiates the photosensitive assembly 200 from the display panel 100, and when the original beam passes through the beam splitter 300, 100% -a% of the light beam is reflected by the beam splitter 300, and the a% of the light beam reaches the photosensitive assembly 200 through the beam splitter 300, and the a% of the light beam can be supplied to the photosensitive assembly 200 for operation. At this time, the intensity of the light beam reflected by the photosensitive element 200 is at most a%, the light beam reflected by the photosensitive element 200 is dispersed again by the beam splitter 300 after passing through the beam splitter 300, and the light beam transmitted by the beam splitter 300 is only a% of the original light intensity. For example, after the incident light passes through the beam splitter 300 with a transmittance of 30%, the light intensity reflected by the photosensitive assembly 200 is 9% of the original light intensity of the incident light. The intensity of the incident light is reduced to 20% or less, so that the problem of uneven light emission of the display panel 100 can be effectively reduced.
With continued reference to fig. 1, the display device 10 further includes a light shielding layer 400, the light shielding layer 400 is disposed on the non-display surface b of the display panel 100, and the light shielding layer 400 is provided with an opening, where the opening is located in the front projection area of the photosensitive assembly 200 on the display panel 100. The display panel 100 includes a circuit layer 110 and a light-emitting layer 120, which are stacked, wherein the light-emitting layer is located on a side of the circuit layer 110 facing the display surface a, and the circuit layer 110 covers the opening.
The light shielding layer 400 can absorb light, so that light from the direction of the display surface a can be prevented from being reflected by the non-display surface b and then irradiated to the display surface a of the display panel 100. The light shielding layer 400 is provided with an opening, so that incident light in the direction of the display panel 100 can be irradiated to the photosensitive assembly 200, and the photosensitive assembly 200 can receive the light for working. However, the light reflected by the photosensitive assembly 200 can also be irradiated to the display panel 100 through the opening. The TFT transistors in the circuit layer 110 of the display panel 100 are irradiated with the reflected light to shift the transistor characteristics, so that the TFT characteristics of the region corresponding to the opening and the other regions are different. The TFT transistors are used to drive the light emitting layer in the display panel 100 to generate light, and the difference in TFT characteristics in the corresponding regions of the openings causes the light generated in the corresponding regions of the light emitting layer to be different from those in other regions. Further, the light emission luminance of the region of the display panel 100 corresponding to the photosensitive member 200 is different from that of the other regions, and thus the light emission of the display panel 100 is not uniform, and mura occurs.
In one embodiment, the display device 10 further includes a light-absorbing frame 500, and the light-absorbing frame 500 is located between the display panel 100 and the photosensitive assembly 200 and at a side of the beam splitter 300; wherein the beam splitter 300 is configured to reflect light generated therefrom to the light-absorbing frame 500. Since the beam splitter 300 is disposed obliquely to the non-display surface b, the incident light from the display panel 100 irradiates the beam splitter 300 at a certain oblique angle, and the beam splitter 300 reflects a part of the incident light and reflects the part of the incident light to the side of the beam splitter 300 to be absorbed by the light-absorbing frame 500. The beam splitter 300 has a light reflecting function, and can reflect light generated on the surface of the beam splitter 300. It should be noted that the "light ray generated from above" may refer to light rays generated from a region above the upper surface of the beam splitter 300 or below the lower surface of the beam splitter 300, and the light rays are irradiated to the upper surface or the lower surface of the beam splitter 300 instead of the side surface of the beam splitter 300. In an embodiment, the light absorbing frame 500 may be made of a light absorbing material, for example, the light absorbing frame 500 may be a black organic material.
Further, the number of the light-absorbing frames 500 is at least two, and the light-absorbing frames are located at two opposite sides of the beam splitter 300 and perpendicular to the non-display surface b. Accordingly, the light is irradiated to the beam splitter 300 from the direction of the display panel 100, wherein a part of the light is reflected by the beam splitter 300, and the light reflected by the beam splitter 300 is directed to the light-absorbing frame 500 to be absorbed by the light-absorbing frame 500. Alternatively, the number of the light-absorbing frames 500 may be one, and the light-absorbing frames 500 are disposed along the circumference of the openings on the light-shielding layer and perpendicular to the non-display surface b, and the beam splitter 300 is obliquely disposed in the light-absorbing frames 500.
In one embodiment, the angle between the beam splitter 300 and the non-display surface b is between 40 degrees and 60 degrees, and the height and position of the light-absorbing frame 500 are configured to receive all reflected light from the beam splitter 300. When the angle between the beam splitter 300 and the non-display surface b is different, the direction of the reflected light of the beam splitter 300 is also different. The height of the light absorption frame 500, the relative positional relationship between the light absorption frame 500 and the beam splitter 300, and the distance between the beam splitter 300 and the non-display surface b can be adjusted according to the included angle between the beam splitter 300 and the non-display surface b, so that the light reflected by the beam splitter 300 is absorbed by the light absorption frame 500. Due to the thickness limitation of the display panel 100, the angle between the beam splitter 300 and the non-display surface b may be set between 40 degrees and 60 degrees.
Further, when the included angle between the beam splitter 300 and the non-display surface b is 45 degrees, the light perpendicular to the non-display surface b can be reflected to be parallel to the non-display surface b, and at this time, the height of the light absorption frame 500 can be equal to the height of the front projection of the beam splitter 300 on the light absorption frame 500.
In one embodiment, the number of the beam splitters 300 is two, the two beam splitters 300 are parallel to each other, and the orthographic projections of the two beam splitters 300 on the non-display surface b are completely overlapped. Specifically, as shown in fig. 3, the two beam splitters 300 may be disposed parallel to each other, and the front projections of the two beam splitters 300 on the non-display surface b are completely overlapped, so that the light intensity of each area can be reduced in the same ratio. The light intensity of the light reflected by the photosensitive member 200 and then irradiated to the non-display surface b can be further reduced by providing two parallel beam splitters 300.
In one embodiment, the number of the beam splitters 300 is two, the two beam splitters 300 are disposed obliquely to each other, and the orthographic projections of the two beam splitters 300 on the non-display surface b are not overlapped at all. As shown in fig. 4, the two beam splitters 300 may also be disposed obliquely to each other, and the front projections of the two beam splitters 300 on the non-display surface b do not overlap at all. The two beam splitters 300 have the same inclination angle with respect to the non-display surface b, so that the light intensity can be reduced at the same ratio. By providing two beam splitters 300 that are inclined to each other, the height of the beam splitters 300 can be reduced while the height of the light absorbing frame 500 is reduced, so that the display device 10 can be thinner.
Further, when the two spectroscopes are disposed obliquely to each other, a light shielding film 310 is further disposed between the two spectroscopes 300. When two beamsplitters 300 are in the same horizontal position, light is reflected from one beam splitter 300 to the other beam splitter 300. The light shielding film 310 is disposed between the two beam splitters 300, so that light transmitted between the two beam splitters 300 can be absorbed, and interaction between the two beam splitters 300 can be reduced.
The application also provides a photosensitive assembly, and referring to fig. 5. Fig. 5 is a schematic structural view of a photosensitive assembly according to an embodiment of the present application. The photosensitive assembly 20 is used to sense light in the display device. Wherein, the photosensitive assembly 20 includes: a photosensitive element 21 and a spectroscope 22.
The photosensitive element 21 is disposed on the non-display surface side of the display panel 30, and the photosensitive element 21 is capable of sensing incident light from the display panel direction; the beam splitter 22 is located at the side of the photosensitive element 21 facing the display panel, and is disposed obliquely to the photosensitive element 21. In particular, reference is made to the above description as regards the arrangement of the beam splitter 22.
The application also provides electronic equipment, and referring to fig. 6. Fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 40 includes the above display apparatus or the above photosensitive assembly, and the driving circuit 41. The driving circuit 41 is electrically connected to the display panel 100 for driving the display panel 100.
The foregoing description is only of embodiments of the present application, and is not intended to limit the scope of the application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application or directly or indirectly applied to other related technical fields are included in the scope of the present application.
Claims (8)
1. A display device, comprising:
a display panel comprising a display surface and a non-display surface which are opposite;
the photosensitive assembly is arranged on one side of the non-display surface of the display panel and can sense incident light rays from the direction of the display panel;
the spectroscope is positioned between the display panel and the photosensitive component and is arranged obliquely to the non-display surface;
the beam splitter is configured such that the intensity of the incident light from the display panel is reduced to less than 20% of the incident light after the incident light has passed through the beam splitter, reflected back from the photosensitive element, and passed through the beam splitter again.
2. The display device according to claim 1, comprising:
the light absorption frame is positioned between the display panel and the photosensitive component and is positioned at the side edge of the spectroscope;
wherein the beam splitter is configured to reflect light generated from above the beam splitter to the light-absorbing frame.
3. The display device of claim 2, wherein the display device comprises a display device,
the beam splitter has an included angle of 40-60 degrees with the non-display surface, and the light absorbing bezel has a height and position configured to receive all of the reflected light from the beam splitter.
4. The display device of claim 2, wherein the display device comprises a display device,
the number of the light absorption frames is at least two, and the light absorption frames are positioned on two opposite sides of the spectroscope and perpendicular to the non-display surface.
5. The display device of claim 1, wherein the display device comprises a display device,
the number of the spectroscopes is two;
the two spectroscopes are arranged in parallel, and the orthographic projections of the two spectroscopes on the non-display surface are completely overlapped; or (b)
The two spectroscopes are arranged obliquely, and the orthographic projections of the two spectroscopes on the non-display surface are not overlapped at all.
6. The display device according to claim 5, wherein a light shielding film is provided between the two spectroscopes when the two spectroscopes are disposed obliquely to each other.
7. The display device according to claim 1, comprising:
the light-shielding layer is arranged on the non-display surface of the display panel, and is provided with an opening which is positioned in the orthographic projection area of the photosensitive assembly on the display panel;
the display panel comprises a circuit layer and a light-emitting layer which are arranged in a stacked mode, wherein the light-emitting layer is located on one side, facing the display surface, of the circuit layer, and the circuit layer covers the light-shielding hole.
8. An electronic device, comprising:
the display device of any one of claims 1-7;
and the driving circuit is electrically connected with the display panel and used for driving the display panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011174463.1A CN112420780B (en) | 2020-10-28 | 2020-10-28 | Display device, photosensitive assembly and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011174463.1A CN112420780B (en) | 2020-10-28 | 2020-10-28 | Display device, photosensitive assembly and electronic equipment |
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| Publication Number | Publication Date |
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| CN112420780A CN112420780A (en) | 2021-02-26 |
| CN112420780B true CN112420780B (en) | 2023-08-22 |
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| CN202011174463.1A Active CN112420780B (en) | 2020-10-28 | 2020-10-28 | Display device, photosensitive assembly and electronic equipment |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110210353A (en) * | 2019-05-23 | 2019-09-06 | 上海思立微电子科技有限公司 | Optical fingerprint identification device, electronic equipment, light compensation method and storage medium |
| CN111052137A (en) * | 2019-11-08 | 2020-04-21 | 深圳市汇顶科技股份有限公司 | Optical fingerprint identification device and electronic equipment |
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- 2020-10-28 CN CN202011174463.1A patent/CN112420780B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110210353A (en) * | 2019-05-23 | 2019-09-06 | 上海思立微电子科技有限公司 | Optical fingerprint identification device, electronic equipment, light compensation method and storage medium |
| CN111052137A (en) * | 2019-11-08 | 2020-04-21 | 深圳市汇顶科技股份有限公司 | Optical fingerprint identification device and electronic equipment |
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| CN112420780A (en) | 2021-02-26 |
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