CN111490177B - Display panel and electronic device - Google Patents
Display panel and electronic device Download PDFInfo
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- CN111490177B CN111490177B CN201910080424.6A CN201910080424A CN111490177B CN 111490177 B CN111490177 B CN 111490177B CN 201910080424 A CN201910080424 A CN 201910080424A CN 111490177 B CN111490177 B CN 111490177B
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- display panel
- area
- multiplexing functional
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
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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
Abstract
The invention provides a display panel and an electronic device, wherein the display panel comprises a display area and at least one multiplexing function area; the display panel includes: a cathode including a first portion and a second portion, the first portion corresponding to a position of the multiplexing functional region; the second portion corresponds to a position of the display area, and the transmittance of the light of the first portion is greater than the transmittance of the light of the second portion. The display panel and the electronic device can improve the accuracy of information acquisition.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to the field of display technologies, and in particular, to a display panel and an electronic device.
[ background of the invention ]
However, when the conventional display panel is turned off, the transmittance of light is relatively low, and according to experimental data, the transmittance of the highest light when the liquid crystal display panel is turned off is not more than 10%, and is interfered by a Black mask (Black mask) and a metal circuit grid in the display panel, for example, taking an optical sensor element as a camera component, which results in a very poor imaging effect of the camera.
Although the transmittance of light when the organic light emitting diode display panel is turned off is greater than that of light when the liquid crystal display panel is turned off, the cathode of the organic light emitting diode display panel is made of a metal material, so that the highest transmittance of the organic light emitting diode display panel when the organic light emitting diode display panel is turned off is about 40%, and the problem similar to that of the liquid crystal display panel can also occur, so that the optical sensing element cannot accurately acquire information.
Therefore, it is desirable to provide a display panel and an electronic device to solve the problems of the prior art.
[ summary of the invention ]
The invention aims to provide a display panel and an electronic device, which can improve the accuracy of information acquisition of an optical sensing element.
In order to solve the above technical problem, the present invention provides a display panel, wherein the display panel includes a display area and at least one multiplexing functional area; the display panel includes:
a cathode including a first portion and a second portion, the first portion corresponding to a position of the multiplexing functional region; the second part corresponds to the position of the display area, and the transmittance of the light of the first part is greater than that of the light of the second part.
The invention also provides an electronic device which comprises the display panel and the optical sensing element.
The display panel comprises a display area and at least one multiplexing function area; the display panel includes: a cathode including a first portion and a second portion, the first portion corresponding to a position of the multiplexing functional region; the second part corresponds to the position of the display area, and the transmittance of the light of the first part is greater than that of the light of the second part; the transmittance of the light of the cathode corresponding to the position of the multiplexing functional area is greater than that of the cathode corresponding to the display area, so that the transmittance of the light of the multiplexing functional area when the screen is turned off is improved, and the accuracy of information acquisition of the optical sensing element is improved.
[ description of the drawings ]
FIG. 1 is a first top view of a display panel according to the present invention;
FIG. 2 is a schematic view of a first structure of a display panel according to the present invention;
FIG. 3 is a second structural diagram of a display panel according to the present invention;
FIG. 4 is a second top view of the display panel of the present invention;
FIG. 5 is a third top view of the display panel of the present invention;
FIG. 6 is a schematic view of a light transmittance of a display panel according to the present invention;
FIG. 7 is a first side view of the electronic device of the present invention;
FIG. 8 is a second side view of the electronic device of the present invention;
fig. 9 is a third side view of the electronic device of the present invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1 to 8, fig. 1 is a first top view of a display panel according to the present invention.
As shown in fig. 1, in a top view, the display panel 10 of the present invention is an organic light emitting diode display panel, and the display panel 10 includes a display region 101 and a multiplexing functional region 102. In one embodiment, the display area 101 may surround the multiplexing functional area 102. In another embodiment, the multiplexing functional region 102 is located at the edge of the display panel 10, such as the upper edge or the lower edge of the display panel 10, in order to improve the display effect. At this time, the display area 101 may partially surround the multiplexing functional area 102. That is, the display region 101 is a region other than the multiplexing functional region 102. Wherein the display area 101 is for display.
The multiplexing functional region 102 (the region where the solid circles are located in fig. 2) is used for displaying and transmitting signals of the optical sensing elements.
As shown in fig. 2, the cross-sectional structure of the display panel 10 includes: a substrate 11, a switch array layer 20, an anode 21, an organic light emitting layer 24, and a cathode 25.
The switch array layer 20 includes a plurality of thin film transistors, and a cross-sectional structure thereof includes a buffer layer 12, a semiconductor layer 13, a gate insulating layer 14, a gate electrode 15, a first insulating layer 16, a metal portion 17, a second insulating layer 18, a second metal layer 19, and a third insulating layer 19'. The second metal layer 19 includes a source electrode 191 and a drain electrode 192.
The anode 121 is located on the switch array layer 20, and the anode 21 is connected to the drain 192 of the tft. The material of the anode 21 may be ITO (indium tin oxide) or a stacked structure of ITO/Ag/ITO.
The organic light emitting layer 24 may include a plurality of light emitting units such as a red light emitting unit, a green light emitting unit, a blue light emitting unit, and the like. The organic light emitting layer 24 may be an organic small molecule blue light emitting material, and the thickness may be in the range of 20-50nm.
In one embodiment, the cathode 25 includes a first portion 251 and a second portion 252. The first portion 251 corresponds to the position of the multiplexing functional region 102. In a top view, the shape of the first portion 251 may be a circle, and a circular pattern is implemented by a Chemical Vapor Deposition (CVD) process. Of course, the shape of the first portion 251 is not limited to a circular shape, and may be other shapes.
In one embodiment, the first portion 251 may include a transparent conductive material. Wherein, in order to further improve the transmittance of the first part of light, the transparent conductive material comprises at least one of transparent conductive oxide, transparent graphene and transparent nano graphene. Wherein the transparent conductive oxide includes at least one of ITO, AZO, and IZO. Wherein a chemical element other than oxygen in the transparent conductive oxide is at least partially different from a chemical element in the second portion.
Of course, the material of the first portion 251 is not limited to the above material, and may be other materials. Wherein the thickness of the first portion 251 ranges from 5nm to 30nm in order to further increase the optical transmittance of the first portion.
The transmittance of the light of the first portion 251 ranges from 80% to 95%, and the transmittance of the light of the second portion 252 ranges from 50% to 65%.
Wherein, the area of the orthographic projection (the position of the outermost dotted line circle in fig. 2) of the first portion 251 on the display panel 10 is greater than or equal to the area of the multiplexing functional region 102. The transmittance of the light of the first portion 251 is greater than that of the second portion 252, and the second portion 252 is made of a metal material.
The second portion 252 corresponds to the position of the display region 101, that is, the portion other than the first portion 251, and the transmittance of the light of the second portion 252 is smaller than that of the first portion 251. Wherein the material of the second portion 252 is different from the material of the first portion 251. In an embodiment, the material of the second portion 252 is a metal material, wherein the material of the second portion 252 may be one or more of Yb, ca, mg, and Ag. The thickness of the second portion 252 is in the range of 10-25nm, and the thickness is too thin to ensure the uniformity of the film thickness, so that the light-emitting efficiency of the panel is reduced.
In another embodiment, as shown in fig. 3, in order to further improve the transmittance of the display panel, the cross-sectional structure of the display panel 10 further includes a coupling light-out layer 26, the coupling light-out layer 26 is located on the cathode 25, and the refractive index of the material of the coupling light-out layer 26 is greater than a preset refractive index. In one embodiment, the material of the coupling light-emitting layer 26 is an organic small molecule material, preferably a hole transport material. Wherein the thickness of the coupling-out light layer 26 is in the range of 50-100nm.
The cross-sectional structure of the display panel 10 further includes a hole injection layer, a hole transport layer, an electron blocking layer, a hole blocking layer, an electron transport layer, and an electron injection layer.
The material of the hole transport layer includes at least one of 2TNATA, NPB, and TAPC. The hole transport layer may have a thickness in the range of 40-150nm and is deposited on the anode 21, in particular by vacuum thermal evaporation. The material of the electron transport layer comprises at least one of TPBi, BPhen and TmPyPB, the thickness of the electron transport layer is 20-80nm, and the electron transport layer is deposited on the organic light-emitting layer 24 through vacuum thermal evaporation. The electron transport layer may be an N-doped electron transport layer.
Returning to fig. 1, when the multiplexing functional region 102 and the first portion 251 are both one, the first portion 251 corresponds one-to-one to the multiplexing functional region 102. That is, each first portion 251 corresponds to one of the multiplexing functional regions 102. As shown in fig. 4, when the multiplexing functional region 102 and the first portion 251 are both two, the first portion 251 and the multiplexing functional region 102 also correspond one-to-one. That is, each first portion 251 corresponds to one of the multiplexing functional regions 102.
In another embodiment, as shown in fig. 5, when there are two multiplexing functional regions 102, two multiplexing functional regions 102 correspond to one first portion 251.
It is understood that the display panel 10 may include more than two multiplexing functional regions 102, and the cathode 25 may also include more than two first portions 251. When there are a plurality of the multiplexing functional regions 102, the plurality of the multiplexing functional regions 102 correspond to one first part 251. When the multiplexing functional region 102 and the first portion 251 are plural, the first portion 251 corresponds to the multiplexing functional region 102 one to one.
As shown in fig. 6, the abscissa in fig. 6 represents the wavelength of visible light, and the ordinate represents the transmittance of light of the display panel. The transmittance of light in the multiplexing functional region is denoted by 41, and the transmittance of light in the display region is denoted by 42. Therefore, when the transmittance of the light of the first part is greater than that of the light of the second part, the transmittance of the light of the multiplexing functional area can be greatly improved, the light can conveniently penetrate through the multiplexing functional area, and the performance of the multiplexing functional area is optimized.
The transmittance of the light of the cathode corresponding to the multiplexing functional area is greater than the preset transmittance, so that the transmittance of the light of the multiplexing functional area is improved, when the display panel is turned off, the light can conveniently penetrate through the multiplexing functional area, and the accuracy of information acquisition of the optical sensing element is improved.
As shown in fig. 7 to 9, the present invention also provides an electronic device 100 including a display panel 10 and an optical sensing element 30.
When the optical sensing element 30 is turned on, the multiplexing functional region 102 is in a first state, so that the optical sensing element 30 transmits a signal through the multiplexing functional region 102. For example, the optical sensing element 30 receives or transmits a signal through the multiplexing functional region 102, where the multiplexing functional region 102 is in a different working state from the display region 101, for example, when the display region 101 is in a display state, the multiplexing functional region 102 is in a non-display state or a non-light emitting state. When the optical sensing element 30 is not turned on, the multiplexing functional region 102 is in a second operating state. At this time, the operation state of the multiplexing functional region 102 is the same as the operation state of the display region 101, for example, when the display region 101 is in the display state, the multiplexing functional region 102 is also in the display state. When the display area 101 is in the off-screen state, the multiplexing functional area 102 is also in the off-screen state.
The optical sensor element 30 is disposed behind the display panel 10, for example, on a circuit board of the display panel and the electronic device. The position of the optical sensor element 30 corresponds to the position of the multiplexing functional region 102. That is, the optical sensor element 30 is disposed directly below the multiplexing functional region 102.
With reference to fig. 1, 3 and 4, the area of the multiplexing functional region 102 is greater than or equal to the area of an orthographic projection (the position of the inner dotted circle in fig. 2) 103 of the optical sensing element 30 on the display panel 10, so as to improve the accuracy of functional control.
Wherein, in order to further improve the accuracy of information acquisition, the area of the orthographic projection of the first portion 251 on the display panel 10 is greater than or equal to the area of the orthographic projection of the optical sensing element 30 on the display panel 10.
Wherein the optical sensing element 30 includes at least one of a camera assembly, an optical receiver, an optical transmitter, and an optical fingerprint sensor. The camera assembly is, for example, a front-facing camera assembly that includes a lens and a sensor. The multiplexing functional region 102 corresponds to the optical sensor element 30.
In one embodiment, when the optical sensing element 30 includes a camera assembly 31 and an optical fingerprint sensor 32, as shown in fig. 8, the camera assembly 31 and the optical fingerprint sensor 32 may correspond to one multiplexing functional area 102 at the same time. At this time, the sum of the orthographic projection areas of the camera assembly 31 and the optical fingerprint sensor 32 on the display panel 10 is smaller than the area of the multiplexing functional region 102 and smaller than the orthographic projection area of the first part 251 on the display panel 10.
In another embodiment, as shown in fig. 9, the camera assembly 31 and the optical fingerprint sensor 32 may correspond to a multiplexing functional area 102, respectively.
In a specific using process, when the camera assembly 31 is detected to be turned on (the user turns on the photographing software to select the self-photographing function), the corresponding multiplexing functional area 102 is controlled to be in a non-light-emitting state, so that an optical image (reflected light) of an object to be photographed is acquired through the multiplexing functional area 102. When the optical fingerprint sensor 32 is detected to be turned on (when the user is detected to perform fingerprint identification), the corresponding multiplexing functional area 102 is controlled to be in a non-light-emitting state, and at this time, the optical fingerprint sensor 32 receives reflected light through the multiplexing functional area 102. When detecting that the user selects the answer key, the corresponding multiplexing functional area 102 is controlled to be in a non-light-emitting state, at this time, the light emitter emits light outwards through the multiplexing functional area 102, and the light receiver receives reflected light through the multiplexing functional area 102. It is understood that when any one of the optical sensing elements is turned on, the multiplexing functional region 102 is in a non-light emitting state.
The display panel comprises a display area and at least one multiplexing function area; the display panel includes: a cathode including a first portion and a second portion, the first portion corresponding to a position of the multiplexing functional region; the second part corresponds to the position of the display area, and the transmittance of the light of the first part is greater than that of the light of the second part; the transmittance of the light of the cathode corresponding to the position of the multiplexing functional area is greater than that of the cathode corresponding to the display area, so that the transmittance of the light of the multiplexing functional area when the screen is turned off is improved, and the accuracy of information acquisition of the optical sensing element is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (12)
1. A display panel is characterized in that the display panel comprises a display area and at least one multiplexing function area; the display area is used for displaying, and the multiplexing functional area is used for displaying and transmitting signals of the optical sensing element; the display panel includes:
a cathode including a first portion and a second portion, the first portion and the second portion being disposed in a same layer; the first part corresponds to the position of the multiplexing functional region; the second part corresponds to the position of the display area, and the transmittance of the light of the first part is greater than that of the light of the second part; the thickness of the first part ranges from 5nm to 30nm, and the thickness of the second part ranges from 10nm to 25nm;
the area of the orthographic projection of the first part on the display panel is larger than or equal to the area of the multiplexing functional area; the area of the multiplexing functional region is larger than or equal to the orthographic projection area of the optical sensing element on the display panel.
2. The display panel according to claim 1,
the first portion includes a transparent conductive material.
3. The display panel of claim 2, wherein the transparent conductive material comprises at least one of transparent conductive oxide, transparent graphene, and transparent nanographene.
4. The display panel according to claim 3, wherein the transparent conductive oxide comprises at least one of ITO, AZO, and IZO.
5. The display panel according to claim 3,
the chemical elements in the transparent conductive oxide other than oxygen are at least partially different from the chemical elements in the second portion.
6. The display panel according to claim 1, wherein the transmittance of the first portion is in a range of 80% to 95%, and the transmittance of the second portion is in a range of 50% to 65%.
7. The display panel according to claim 1,
the first part corresponds to the multiplexing functional region one to one, or a plurality of multiplexing functional regions correspond to one first part.
8. The display panel according to claim 1, wherein a material of the second portion is a metal material.
9. The display panel according to claim 1,
the display panel further comprises a coupling light-emitting layer, the coupling light-emitting layer is located on the cathode, and the refractive index of the material of the coupling light-emitting layer is larger than the preset refractive index.
10. An electronic device comprising the display panel according to any one of claims 1 to 9 and an optical sensor element.
11. The electronic device of claim 10,
the optical sensing element is arranged behind the display panel, and the position of the optical sensing element corresponds to the position of the multiplexing functional area.
12. The electronic device of claim 10,
the optical sensing element includes at least one of a camera assembly, an optical receiver, an optical emitter, and an optical fingerprint sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910080424.6A CN111490177B (en) | 2019-01-28 | 2019-01-28 | Display panel and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910080424.6A CN111490177B (en) | 2019-01-28 | 2019-01-28 | Display panel and electronic device |
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| CN111490177A CN111490177A (en) | 2020-08-04 |
| CN111490177B true CN111490177B (en) | 2023-01-10 |
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| CN1934709A (en) * | 2004-03-24 | 2007-03-21 | 皇家飞利浦电子股份有限公司 | Electroluminescent display devices |
| CN103779377A (en) * | 2012-10-25 | 2014-05-07 | 友达光电股份有限公司 | Organic light emitting display and manufacture method thereof |
| CN105938843A (en) * | 2015-03-02 | 2016-09-14 | 三星显示有限公司 | Transparent organic light emitting display apparatus and method of manufacturing the same |
| CN109065582A (en) * | 2018-08-02 | 2018-12-21 | 京东方科技集团股份有限公司 | A kind of array substrate and display panel, display device |
| CN109166897A (en) * | 2018-09-03 | 2019-01-08 | 京东方科技集团股份有限公司 | Transparent display panel, preparation method and display device |
| CN110060578A (en) * | 2018-01-19 | 2019-07-26 | 华为技术有限公司 | Terminal device and display methods |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180051692A (en) * | 2016-11-07 | 2018-05-17 | 삼성디스플레이 주식회사 | Fingerprint sensor, display device and manufacturing method of display device |
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2019
- 2019-01-28 CN CN201910080424.6A patent/CN111490177B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934709A (en) * | 2004-03-24 | 2007-03-21 | 皇家飞利浦电子股份有限公司 | Electroluminescent display devices |
| CN103779377A (en) * | 2012-10-25 | 2014-05-07 | 友达光电股份有限公司 | Organic light emitting display and manufacture method thereof |
| CN105938843A (en) * | 2015-03-02 | 2016-09-14 | 三星显示有限公司 | Transparent organic light emitting display apparatus and method of manufacturing the same |
| CN110060578A (en) * | 2018-01-19 | 2019-07-26 | 华为技术有限公司 | Terminal device and display methods |
| CN109065582A (en) * | 2018-08-02 | 2018-12-21 | 京东方科技集团股份有限公司 | A kind of array substrate and display panel, display device |
| CN109166897A (en) * | 2018-09-03 | 2019-01-08 | 京东方科技集团股份有限公司 | Transparent display panel, preparation method and display device |
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