CN116685168B - Display panel and display device - Google Patents
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- CN116685168B CN116685168B CN202310783339.2A CN202310783339A CN116685168B CN 116685168 B CN116685168 B CN 116685168B CN 202310783339 A CN202310783339 A CN 202310783339A CN 116685168 B CN116685168 B CN 116685168B
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- 239000002184 metal Substances 0.000 description 11
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/13—Active-matrix OLED [AMOLED] displays comprising photosensors that control luminance
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
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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
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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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
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
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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
- H10K59/80—Constructional details
- H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
- H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
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Abstract
The application discloses a display panel and a display device, wherein the display panel comprises a display area and a transmission area, an optical element is arranged on the display panel corresponding to the transmission area, the display panel comprises a plurality of first pixel points and a plurality of second pixel points, the first pixel points are arranged in the transmission area, and the second pixel points are arranged in the display area; the effective light-emitting area of the first pixel point is smaller than that of the second pixel point; the display panel further comprises at least one first photosensitive unit, wherein the first photosensitive unit is arranged in the transmission area and is used for detecting the luminous brightness of a first pixel point of the transmission area. By the scheme, the luminous brightness of the transmission area is detected, the brightness compensation is carried out on the transmission area, and the display uniformity of the display panel is improved.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the continuous development of OLED (Organic Light-Emitting Diode) display technology, OLED is also being widely used in displays of smartphones, tablets, computers, televisions, and the like. OLED displays have the advantages of thin and light weight, high contrast, fast response, wide viewing angle, high brightness, full color, etc. In order to reduce the reflectivity of external light in an OLED display, a circular polarizer is attached to the light-emitting surface of the OLED display in the mainstream scheme at present, but the scheme reduces the light-emitting effect due to the fact that the light loss of the circular polarizer is large. Another scheme is to set a color filter on the light emitting surface of the OLED display, to improve the light emitting efficiency by the color filter, and to reduce the effect of the reflection of the ambient light in the OLED display by the Black Matrix (BM).
With the development of technology, the screen ratio of the display panel is higher and higher, and the concept of a comprehensive screen, that is, the screen ratio reaches 100%, is gradually evolved. The most critical technology for realizing the full-face screen is to arrange a camera below the screen and arrange a transmission area with higher light transmission on a corresponding display panel. Since a large amount of light transmission is required in the transmission region, the light emission area of the transmission region is smaller than that of the normal display region, and the light emission attenuation degree of the transmission region does not coincide with that of the normal display region.
Disclosure of Invention
The application aims to provide a display panel and a display device, which are used for detecting the luminous brightness of a transmission area, compensating the brightness of the transmission area and improving the display uniformity of the display panel.
The application discloses a display panel, which comprises a display area and a transmission area, wherein an optical element is arranged on the display panel corresponding to the transmission area, the display panel comprises a plurality of first pixel points and a plurality of second pixel points, the first pixel points are arranged in the transmission area, and the second pixel points are arranged in the display area; the effective light-emitting area of the first pixel point is smaller than that of the second pixel point; the display panel further comprises at least one first photosensitive unit, wherein the first photosensitive unit is arranged in the transmission area and is used for detecting the luminous brightness of a first pixel point of the transmission area.
Optionally, the display panel further includes a processing unit and at least one second photosensitive unit, where the second photosensitive unit is disposed in the display area and is configured to detect a light-emitting brightness of a second pixel point in the display area; the processing unit is used for receiving first detection data of the first photosensitive unit and second detection data of the second photosensitive unit, comparing the first detection data with the second detection data, and performing brightness compensation on the first pixel point according to a comparison result.
Optionally, the display area includes a peripheral area, the peripheral area is disposed around the transmission area, and the second photosensitive unit is disposed in the peripheral area.
Optionally, the plurality of first pixel points include a first red pixel point, a first green pixel point and a first blue pixel point respectively; the first photosensitive unit is arranged between the first red pixel point and the first green pixel point; and/or the first photosensitive unit is arranged between the first red pixel point and the first blue pixel point; and/or the first photosensitive unit is arranged between the first blue pixel point and the first green pixel point; the plurality of second pixel points respectively comprise a second red pixel point, a second green pixel point and a second blue pixel point; the second photosensitive unit is arranged between the second red pixel point and the second green pixel point; and/or the second photosensitive unit is arranged between the second red pixel point and the second blue pixel point; and/or the second photosensitive unit is arranged between the second blue pixel point and the second green pixel point.
Optionally, adjacent the first red pixel point, the first green pixel point and the first blue pixel point form a pixel, and in the same pixel, the first red pixel point, the first green pixel point and the first blue pixel point form a delta-shaped structure; only one first photosensitive unit is arranged in the same first pixel point, and the first photosensitive unit is arranged among the first red pixel point, the first green pixel point and the first blue pixel point.
Optionally, the display panel includes: the pixel structure comprises a substrate, a pixel definition layer, a plurality of first light emitting units, a plurality of second light emitting units, an encapsulation layer and a color filter layer. The pixel definition layer is provided with an opening area; the plurality of first light-emitting units are arranged in the opening area corresponding to the plurality of first pixel points, and each of the plurality of light-emitting units comprises a first red light-emitting unit, a first green light-emitting unit and a first blue light-emitting unit; the plurality of second light-emitting units are arranged in the opening area corresponding to the second pixel points, and each of the plurality of second light-emitting units comprises a second red light-emitting unit, a second green light-emitting unit and a second blue light-emitting unit; the packaging layer is arranged to cover the first light emitting unit, the second light emitting unit and the pixel definition layer; the color filter layer is arranged on the packaging layer and comprises a black matrix and a plurality of color filter parts, the color filter parts are arranged in the opening area, and adjacent color filter parts are separated by the black matrix; the first light sensing unit and the second light sensing unit are respectively arranged under the black matrix, and the first light sensing unit is used for receiving light rays emitted by the first light emitting unit; the second photosensitive unit is used for receiving the light rays emitted by the second light-emitting unit.
Optionally, the display panel further includes a first insulating layer and a second insulating layer; the first insulating layer is disposed between the first photosensitive unit and the black matrix, and the second insulating layer is disposed between the second photosensitive unit and the black matrix.
Optionally, the display panel further includes an eave structure, the eave structure is disposed on the pixel definition layer, the eave structure includes a conductive layer and a non-conductive layer, the conductive layer is disposed on the pixel definition layer, the non-conductive layer is disposed on the conductive layer, and a width of the non-conductive layer is wider than a width of the conductive layer.
Optionally, the plurality of first pixel points include a first red pixel point, a first green pixel point and a first blue pixel point respectively; adjacent three first red pixel points, the first green pixel points and the first blue pixel points form a pixel; in the same pixel, the first red pixel point, the first green pixel point and the first blue pixel point form a delta-shaped structure; only one first photosensitive unit is arranged in the same pixel, and the first photosensitive unit is arranged among the first red pixel point, the first green pixel point and the first blue pixel point.
The application also discloses a display device which comprises the driving circuit and the display panel, wherein the driving circuit is used for driving the display panel to display.
According to the application, the plurality of first photosensitive units are arranged in the transmission area, the first photosensitive units are used for detecting the luminous brightness of the first pixel points of the transmission area, and when the luminous brightness is consistent under the same gray scale, the first pixel points of the transmission area are weak in attenuation or have no attenuation, so that brightness compensation is not needed. When the light-emitting brightness in the same gray scale gradually decreases with time, it is indicated that the first pixel point of the transmission region has attenuation, and brightness compensation is required. The application carries out brightness compensation on the first pixel point of the transmission area by arranging the first photosensitive unit, thereby solving the problem that the light-emitting attenuation degree of the transmission area is inconsistent with the light-emitting attenuation degree of the display area. The display effect of the transmission area and the display area is consistent, the uniformity is better, and the taste of the display panel is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is evident that the figures in the following description are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art. In the drawings:
FIG. 1 is a schematic top view of a display panel according to a first embodiment of the present application;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1;
Fig. 3 is a schematic cross-sectional view of a display panel according to a first embodiment of the present application;
FIG. 4 is a schematic top view of a display panel according to a second embodiment of the application;
FIG. 5 is an enlarged schematic view of a portion of FIG. 4;
fig. 6 is a schematic cross-sectional view of a display panel according to a second embodiment of the present application;
fig. 7 is a schematic view of a display device according to a third embodiment of the present application.
100 Parts of a display panel; 101. a display area; 102. a transmission region; 103. a peripheral region; 104. an opening region; 110. a first pixel point; 111. a first red pixel point; 112. a first green pixel point; 113. a first blue pixel point; 120. a second pixel point; 121. a second red pixel point; 122. a second green pixel; 123. a second blue pixel point; 130. a pixel; 131. a first photosensitive unit; 132. a second photosensitive unit; 140. a substrate; 141. a pixel definition layer; 142. a first light emitting unit; 143. a second light emitting unit; 144. an encapsulation layer; 145. a color filter layer; 146. a black matrix; 147. a color filter; 148. a first insulating layer; 149. a second insulating layer; 150. an eave structure; 151. a conductive layer; 152. a non-conductive layer; 200. a display device; 210. and a driving circuit.
Detailed Description
It is to be understood that the terminology used herein, the specific structural and functional details disclosed are merely representative for the purpose of describing particular embodiments, but that the application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or implicitly indicating the number of technical features indicated. Thus, unless otherwise indicated, features defining "first", "second" may include one or more such features either explicitly or implicitly; the meaning of "plurality" is two or more. In addition, terms of the azimuth or positional relationship indicated by "upper", "lower", "left", "right", "vertical", "horizontal", etc., are described based on the azimuth or relative positional relationship shown in the drawings, and are merely for convenience of description of the present application, and do not indicate that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present application. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The application is described in detail below with reference to the attached drawings and alternative embodiments.
Embodiment one:
Fig. 1 is a schematic top view of a display panel according to a first embodiment of the present application, fig. 2 is a partially enlarged schematic view of fig. 1, and fig. 3 is a schematic cross-sectional view of the display panel according to the first embodiment of the present application; referring to fig. 1 to 3, the present application discloses a display panel 100 including a display area 101 and a transmission area 102, and the display panel 100 is provided with optical elements corresponding to the transmission area 102.
The display area 101 and the transmission area 102 form a display area of the display panel 100, and optical components such as a camera may be generally disposed under the transmission area 102 and disposed under the display panel 100. Both the transmission region 102 and the display region 101 have a function of displaying a picture, but the light transmission amount of the transmission region 102 is far greater than that of the display region 101, so that the transmission region 102 can also realize an under-screen image capturing function. In contrast, the effective light emitting area of the transmissive region 102 is also smaller than the effective light emitting area of the display region 101. Since the light emitting area of the pixels of the transmissive area 102 is often smaller than the light emitting area of the pixels of the display area 101, the brightness of the transmissive area 102 needs to be made higher if the transmissive area 102 and the display area 101 have the same display effect during the display. And from the OLED device lifetime degradation, the pixel lifetime degradation of the transmissive region 102 is caused to be greater than the pixel lifetime degradation of the display region 101. Thus, after a period of use, the display effect of the transmissive region 102 tends to be inferior to that of the display region 101. In this regard, the present application has been made as follows.
The display panel 100 includes a plurality of first pixel points 110 and a plurality of second pixel points 120, the first pixel points 110 are disposed in the transmission area 102, and the second pixel points 120 are disposed in the display area 101; the effective light emitting area of the first pixel point 110 is smaller than the effective light emitting area of the second pixel point 120; the display panel 100 further includes at least one first photosensitive unit 131, where the first photosensitive unit 131 is disposed in the transmissive area 102 and is configured to detect the light-emitting brightness of the first pixel 110 of the transmissive area 102.
In the present application, by disposing the plurality of first photosensitive units 131 in the transmission region 102, the first photosensitive units 131 detect the light-emitting brightness of the first pixel 110 of the transmission region 102, and when the light-emitting brightness is consistent under the same gray scale, it is indicated that the attenuation of the first pixel 110 of the transmission region 102 is weak or no attenuation, and brightness compensation is not required. When the light-emitting brightness at the same gray level gradually decreases with time, it is indicated that the first pixel 110 of the transmissive region 102 has attenuation, and brightness compensation is required. The application performs brightness compensation on the first pixel 110 of the transmission region 102 by arranging the first photosensitive unit 131, thereby solving the problem that the light-emitting attenuation degree of the transmission region 102 is inconsistent with the light-emitting attenuation degree of the display region 101. The display effect of the transmission area 102 and the display area 101 is consistent, the uniformity is better, and the taste of the display panel 100 is further improved.
It is understood that the effective light emitting area of the first pixel 110 is smaller than the effective light emitting area of the second pixel 120, which is referred to as the effective light emitting area in the light emitting unit. At least three first pixel points 110 constitute one pixel 130, and at least three second pixel points 120 constitute one pixel 130.
Specifically, the display panel 100 includes a substrate 140, a pixel defining layer 141, a plurality of first light emitting units 142, a plurality of second light emitting units 143, an encapsulation layer 144, and a color filter layer 145. The pixel defining layer 141 is provided with a plurality of opening areas 104, a plurality of first light emitting units 142 are disposed in the opening areas 104 corresponding to the plurality of first pixel points 110, a plurality of second light emitting units 143 are disposed in the opening areas 104 corresponding to the second pixel points 120, and an encapsulation layer 144 is disposed to cover the first light emitting units 142, the second light emitting units 143 and the pixel defining layer 141; the color filter layer 145 is disposed on the encapsulation layer 144 and includes a black matrix 146 and a plurality of color filter portions 147, the color filter portions 147 are disposed in the opening region 104, and adjacent color filter portions 147 are separated by the black matrix 146.
The display panel 100 includes an open area 104 and a non-open area; the opening region 104 is generally a region where the color filter 147 can display red, green, blue, and the like, and corresponds to a region between adjacent pixel definition layers 141 of the display panel 100, the non-opening region is a region where the black matrix 146 is positioned, and the display region corresponds to a region of the pixel definition layer 141, and both the opening region 104 and the non-opening region are generally located in the display region of the display panel 100.
In this embodiment, the first photosensitive unit 131 is disposed below the black matrix 146 and above the encapsulation layer 144, and the first photosensitive unit 131 is disposed in the non-opening region. The first light sensing unit 131 is configured to receive the light emitted by the first light emitting unit 142, and detect the brightness of the first light emitting unit 142 at the same gray level multiple times in the time dimension. The degree of brightness decay of the first light emitting unit 142 can be obtained through a plurality of brightness comparisons.
It can be understood that the first photosensitive unit 131 of the present application can be used for inputting a preset frame during each power-on process of the display panel 100 in actual use, detecting the brightness of the first light emitting unit 142 under the preset frame, and comparing the detected value with the last detected value for storage. When the comparison result is within the threshold range, the first light emitting unit 142 is not compensated, and when the comparison result is beyond the threshold range, the first light emitting unit 142 needs to be brightness-compensated. The brightness compensation in the present embodiment includes, but is not limited to, increasing the voltage of the first light emitting unit 142.
Within the transmissive region 102, the plurality of light emitting units include a first red light emitting unit, a first green light emitting unit, and a first blue light emitting unit, respectively; the color filter 147 of the transmissive region 102 includes a first red filter, a first green filter, and a first blue filter, respectively, and the first red filter and the first red light emitting unit are correspondingly disposed in the same opening region 104 to form a first red pixel 111. The first green filter portion and the first green light emitting unit are correspondingly disposed in the same opening region 104, so as to form a first green pixel 112. The first blue filter portion and the first blue light emitting unit are correspondingly disposed in the same opening region 104, so as to form a first blue pixel 113. Wherein, three adjacent first red pixel points 111, first green pixel points 112 and first blue pixel points 113 form a pixel 130, and by distributing different gray scales, a single pixel can realize display of multiple colors.
In the display area 101, the plurality of second light emitting units 143 include a second red light emitting unit, a second green light emitting unit, and a second blue light emitting unit, respectively; the color filter 147 of the display area 101 includes a second red filter, a second green filter, and a second blue filter, respectively, and the second red filter and the second red light emitting unit are correspondingly disposed in the same opening area 104 to form a second red pixel 121. The second green filter portion and the second green light emitting unit are correspondingly disposed in the same opening region 104, so as to form a second green pixel 122. The second blue filter portion and the second blue light emitting unit are correspondingly disposed in the same opening region 104, so as to form a second blue pixel 123.
It can be understood that at least one first photosensitive unit 131 is provided in the present application, and the light emitting degree of the entire transmission region 102 can be detected by one first photosensitive unit 131. Or the first photosensitive unit 131 detects the luminescence attenuation of one pixel 130 point to integrally adjust the brightness compensation of all the pixel points of the whole transmission area 102 according to the change of the one pixel 130 point.
In another embodiment, one first photosensitive unit 131 may be provided per each partition according to the partition in the transmissive area 102. Specifically, one pixel 130 may be a partition. The pixel 130 includes three first pixel points 110, and the three first pixel points 110 include three first light emitting units 142, which are a first red light emitting unit, a first green light emitting unit, and a first blue light emitting unit, respectively. In the same first pixel 110, the first red pixel 111, the first green pixel 112 and the first blue pixel 113 form a delta structure; the first photosensitive unit 131 is disposed among the first red pixel point 111, the first green pixel point 112, and the first blue pixel point 113.
In this embodiment, the above-mentioned preset screen may be a pure-color screen of RGB, and during the power-on process, red, green and blue screens are sequentially output, and the screen may be limited to be displayed in the transmission area 102. The first light sensing unit 131 may respectively receive the light emitted by the first red light emitting unit, the first green light emitting unit and the first blue light emitting unit, and sequentially determine the light emission attenuation of the different first light emitting units 142. In this embodiment, the possible attenuation degrees of the first light emitting units 142 with different colors are different, so that the present embodiment can realize different attenuation detection for the first red light emitting unit, the first green light emitting unit and the first blue light emitting unit, thereby respectively realizing different brightness compensation.
In another implementation, a plurality of first photosensitive cells 131 may be disposed within one pixel 130. Specifically, the first photosensitive unit 131 is disposed between the first red pixel 111 and the first green pixel 112; and/or the first photosensitive unit 131 is disposed between the first red pixel point 111 and the first blue pixel point 113; and/or the first photosensitive unit 131 is disposed between the first blue pixel point 113 and the first green pixel point 112.
Specifically, the display panel 100 further includes an eave structure 150, the eave structure 150 is disposed on the pixel defining layer 141, the eave structure 150 includes a conductive layer 151 and a non-conductive layer 152, the conductive layer 151 is disposed on the pixel defining layer 141, the non-conductive layer 152 is disposed on the conductive layer 151, and a width of the non-conductive layer 152 is wider than a width of the conductive layer 151. Wherein, the non-conductive layer 152 may be an insulating layer; the conductive layer 151 may be a metal layer.
It can be understood that the first metal layer and the insulating layer of the present application form the eave structure 150 by a mask removing evaporation process, that is, the pixel defining layer 141 is formed on the substrate 140, the first metal layer is formed on the pixel defining layer 141, and the insulating layer is formed on the first metal layer, wherein the width of the insulating layer is slightly larger than the width of the first metal layer, so that the eave structure 150 is formed. In the process of forming the light emitting unit, it is not necessary to use a metal mask, and each film layer, such as a light emitting layer, is formed just between the pixel defining layers 141 when each film layer of the light emitting unit is evaporated by shielding of the eave structure 150. This technique does not require the use of a mask, and is called unmasking evaporation. However, since the first metal layer is disposed on the pixel defining layer 141, when the mask removing evaporation is implemented by using the first metal layer and the insulating layer, the first metal layer is easily positioned to receive the ambient incident light with a large angle, and the metal layer has a higher reflectivity, so that the ambient incident light with a large angle is easily reflected to the adjacent pixels through the first metal layer and then emitted. The first photosensitive unit 131 of the present application can also be used for detecting the incident intensity of the ambient light in the dark state.
The photosensitive element in the application can be a structure such as a photosensitive diode, a photosensitive thin film transistor and the like.
Embodiment two:
fig. 4 is a schematic top view of a display panel according to a second embodiment of the present application, fig. 5 is a partially enlarged schematic view of fig. 4, and fig. 6 is a schematic cross-sectional view of the display panel according to the second embodiment of the present application; unlike the previous embodiment, the present embodiment selects whether to perform brightness compensation on the pixels of the transmissive area 102 by comparing the brightness of the transmissive area 102 with the brightness of the display area 101 at the same gray scale.
Referring to fig. 3-6, the present application discloses a display panel 100, where the display panel 100 includes a plurality of first pixel points 110 and a plurality of second pixel points 120, the first pixel points 110 are disposed in the transmission area 102, and the second pixel points 120 are disposed in the display area 101; the effective light emitting area of the first pixel point 110 is smaller than the effective light emitting area of the second pixel point 120; the display panel 100 further includes at least one first photosensitive unit 131, where the first photosensitive unit 131 is disposed in the transmissive area 102 and is configured to detect the light-emitting brightness of the first pixel 110 of the transmissive area 102.
The display panel 100 further includes a processing unit and at least one second light sensing unit 132, where the second light sensing unit 132 is disposed in the display area 101 and is configured to detect a light emitting brightness of the second pixel 120 of the display area 101; the processing unit is configured to receive the first detection data of the first photosensitive unit 131 and the second detection data of the second photosensitive unit 132, compare the first detection data with the second detection data, and perform brightness compensation on the first pixel 110 according to the comparison result.
In the present embodiment, by comparing the brightness of the first light sensing unit 131 and the second light sensing unit 132 at the same gray level, whether to perform brightness compensation on the first light emitting unit 142 is selected according to the brightness difference. Unlike the previous embodiment, the present embodiment can detect the data of the first light sensing unit 131 and the second light sensing unit 132 at any time, and adjust the brightness compensation data of the first light emitting unit 142 after comparing, so as to perform brightness compensation on the first light emitting unit 142.
However, in the present embodiment, it is understood that, for example, in the first embodiment, the luminance data can be recorded multiple times in the time dimension, and not only can be compared laterally, but also the luminance data detected multiple times can be compared in the time dimension.
In this embodiment, the first light sensing unit 131 and the second light sensing unit 132 can detect the brightness of the light emitting units in different areas. Correspondingly, the present embodiment does not need to completely match the luminance of the light emitting unit of the transmissive area 102 with the luminance of the light emitting unit of the display area 101. Only at the transition position between the transmission region 102 and the display region 101, the brightness of the portion of the first light emitting unit 142 is compensated, the brightness compensation of the first light emitting unit 142 corresponding to the center of the transmission region 102 is gradually reduced, and the gradual transition of the brightness compensation is realized. So that the human eye cannot clearly find a clear difference between the transmissive area 102 and the display area 101.
In one embodiment of the present application, the display area 101 includes a peripheral area 103, the peripheral area 103 is disposed around the transmissive area 102, and the second photosensitive unit 132 is disposed in the peripheral area 103. In the present embodiment, the second light sensing unit 132 is disposed only around the transmission region 102, and the brightness of the second light emitting unit 143 closest to the transmission region 102 in the display region 101 is detected by the second light sensing unit 132. After the brightness of the portion of the second light emitting unit 143 is compared with the brightness of the first light emitting unit 142, the brightness of the first light emitting unit 142 is compensated, so that the brightness of the first light emitting unit 142 under the same gray scale is closer to the brightness of the portion of the second light emitting unit 143, and the overall display effect of the display panel 100 is improved.
Specifically, the second light emitting unit 143 may be disposed in only one pixel 130, or in only one pixel 130, as in the first light emitting unit 142, which is not described herein.
The first light emitting unit 142 and the second light emitting unit 143 are arranged in different ways. Within one pixel 130, three first light emitting units 142 form a delta shape, and the light emitting area of one of the first light emitting units 142 is larger than the other two. In the display area 101, three second light emitting units 143 are arranged in a row or column order, respectively, in the same pixel 130. The three second light emitting units 143 are uniform in size in consideration of display uniformity. The transmissive region 102 is mainly the first blue light emitting unit with a slightly larger area, so that blue light loss can be avoided, and a larger starting voltage is required for the first blue light emitting unit.
Specifically, the display panel 100 includes a substrate 140, a pixel defining layer 141, a plurality of first light emitting units 142, a plurality of second light emitting units 143, an encapsulation layer 144, and a color filter layer 145. The pixel defining layer 141 is provided with a plurality of opening areas 104, a plurality of first light emitting units 142 are disposed in the opening areas 104 corresponding to the plurality of first pixel points 110, a plurality of second light emitting units 143 are disposed in the opening areas 104 corresponding to the second pixel points 120, and an encapsulation layer 144 is disposed to cover the first light emitting units 142, the second light emitting units 143 and the pixel defining layer 141; the color filter layer 145 is disposed on the encapsulation layer 144 and includes a black matrix 146 and a plurality of color filter portions 147, the color filter portions 147 are disposed in the opening region 104, and adjacent color filter portions 147 are separated by the black matrix 146.
The display panel 100 further includes a first insulating layer 148 and a second insulating layer 149; the first insulating layer 148 is disposed between the first photosensitive unit 131 and the black matrix 146, and the second insulating layer 149 is disposed between the second photosensitive unit 132 and the black matrix 146.
In this solution, it is mainly considered that the carbon black particles in the black matrix 146 have a certain conductive property, and in order to prevent the black matrix 146 from interfering the first photosensitive unit 131 and the second photosensitive unit 132, an insulating layer is formed between the black matrix 146 and the first rigid light unit and the second photosensitive unit 132 to protect them.
The display panel 100 further includes an eave structure 150, the eave structure 150 is disposed on the pixel defining layer 141, the eave structure 150 includes a conductive layer 151 and a non-conductive layer 152, the conductive layer 151 is disposed on the pixel defining layer 141, the non-conductive layer 152 is disposed on the conductive layer 151, and a width of the non-conductive layer 152 is wider than a width of the conductive layer 151.
It should be noted that the optical element of the present application may be a camera, and disposed on a back side of the substrate 140 away from the light emitting unit. Generally, the transmission region 102 will be slightly larger than the projection range of the optical element onto the substrate 140.
Embodiment III:
Fig. 7 is a schematic diagram of a display device according to a third embodiment of the present application, and referring to fig. 7, the present application discloses a display device, wherein a display device 200 includes a driving circuit 210 and the display panel 100 according to any of the above embodiments, and the driving circuit 210 is used for driving the display panel 100 to display.
In the present application, by disposing the plurality of first photosensitive units 131 in the transmission region 102, the first photosensitive units 131 detect the light-emitting brightness of the first pixel 110 of the transmission region 102, and when the light-emitting brightness is consistent under the same gray scale, it is indicated that the attenuation of the first pixel 110 of the transmission region 102 is weak or no attenuation, and brightness compensation is not required. When the light-emitting brightness at the same gray level gradually decreases with time, it is indicated that the first pixel 110 of the transmissive region 102 has attenuation, and brightness compensation is required. Or the first light sensing unit 131 is disposed in the transmission region 102, the second light sensing unit 132 is disposed in the display region 101, and whether to perform brightness compensation on the first light emitting unit 142 is selected according to brightness difference by comparing brightness of the first light sensing unit 131 and the second light sensing unit 132 at the same gray level. Unlike the previous embodiment, the present embodiment can detect the data of the first light sensing unit 131 and the second light sensing unit 132 at any time, and adjust the brightness compensation data of the first light emitting unit 142 after comparing, so as to perform brightness compensation on the first light emitting unit 142. The first photosensitive unit 131 is arranged to perform brightness compensation on the first pixel 110 of the transmission area 102, so that the problem that the light-emitting attenuation degree of the transmission area 102 is inconsistent with the light-emitting attenuation degree of the display area 101 is solved. The display effect of the transmission area 102 and the display area 101 is consistent, the uniformity is better, and the taste of the display panel 100 is further improved.
It should be noted that, the inventive concept of the present application can form a very large number of embodiments, but the application documents are limited in space and cannot be listed one by one, so that on the premise of no conflict, the above-described embodiments or technical features can be arbitrarily combined to form new embodiments, and after the embodiments or technical features are combined, the original technical effects will be enhanced.
The above description of the application in connection with specific alternative embodiments is further detailed and it is not intended that the application be limited to the specific embodiments disclosed. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the application, and these should be considered to be within the scope of the application.
Claims (5)
1. The display panel comprises a display area and a transmission area, wherein an optical element is arranged in the display area corresponding to the transmission area;
The effective light-emitting area of the first pixel point is smaller than that of the second pixel point;
The display panel further comprises at least one first photosensitive unit, wherein the first photosensitive unit is arranged in the transmission area and is used for detecting the luminous brightness of a first pixel point of the transmission area;
The display panel also comprises a processing unit and at least one second photosensitive unit, wherein the second photosensitive unit is arranged in the display area and is used for detecting the luminous brightness of a second pixel point of the display area; the processing unit is used for receiving first detection data of the first photosensitive unit and second detection data of the second photosensitive unit, comparing the first detection data with the second detection data, and performing brightness compensation on the first pixel point according to a comparison result;
The display panel further comprises a substrate, a pixel definition layer, a plurality of first light emitting units, a plurality of second light emitting units, a packaging layer and a color filter layer; the pixel definition layer is provided with an opening area; the plurality of first light-emitting units are arranged in the opening area corresponding to the plurality of first pixel points, and each of the plurality of first light-emitting units comprises a first red light-emitting unit, a first green light-emitting unit and a first blue light-emitting unit; the plurality of second light-emitting units are arranged in the opening area corresponding to the second pixel points, and each of the plurality of second light-emitting units comprises a second red light-emitting unit, a second green light-emitting unit and a second blue light-emitting unit; the packaging layer is arranged to cover the first light emitting unit, the second light emitting unit and the pixel definition layer; the color filter layer is arranged on the packaging layer and comprises a black matrix and a plurality of color filter parts, the color filter parts are arranged in the opening area, and adjacent color filter parts are separated by the black matrix;
The first photosensitive unit and the second photosensitive unit are respectively arranged below the black matrix and are positioned on the packaging layer; the first photosensitive unit is used for receiving the light rays emitted by the first light-emitting unit; the second photosensitive unit is used for receiving the light rays emitted by the second light-emitting unit;
The plurality of first pixel points respectively comprise a first red pixel point, a first green pixel point and a first blue pixel point; the plurality of second pixel points respectively comprise a second red pixel point, a second green pixel point and a second blue pixel point;
The first red pixel point, the first green pixel point and the first blue pixel point are adjacent to form a pixel, and in the same pixel, the first red pixel point, the first green pixel point and the first blue pixel point form a delta-shaped structure; only one first photosensitive unit is arranged in the same first pixel point, and the first photosensitive unit is arranged among the first red pixel point, the first green pixel point and the first blue pixel point;
the second red pixel point, the second green pixel point and the second blue pixel point which are adjacent to each other form a pixel, at least two second photosensitive units are arranged in the same second pixel point, and the second photosensitive units are arranged between the second red pixel point and the second green pixel point; and/or the second photosensitive unit is arranged between the second red pixel point and the second blue pixel point; and/or the second photosensitive unit is arranged between the second blue pixel point and the second green pixel point.
2. The display panel according to claim 1, wherein the display region includes a peripheral region disposed around the transmissive region, and the second photosensitive unit is disposed in the peripheral region.
3. The display panel of claim 1, further comprising a first insulating layer and a second insulating layer; the first insulating layer is disposed between the first photosensitive unit and the black matrix, and the second insulating layer is disposed between the second photosensitive unit and the black matrix.
4. The display panel of claim 1, further comprising an eave structure disposed on the pixel-defining layer, the eave structure comprising a conductive layer disposed on the pixel-defining layer and a non-conductive layer disposed on the conductive layer, the non-conductive layer having a width that is wider than a width of the conductive layer; the first photosensitive unit is arranged above the eave structure.
5. A display device comprising a drive circuit and the display panel of any one of claims 1-4, wherein the drive circuit is configured to drive the display panel to display.
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| WO2020140279A1 (en) * | 2019-01-04 | 2020-07-09 | 京东方科技集团股份有限公司 | Display panel and operating method therefor |
| CN111276522A (en) * | 2020-02-11 | 2020-06-12 | 武汉华星光电半导体显示技术有限公司 | Display panel and mobile terminal |
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