WO2018201693A1 - 阵列基板、图像采集方法及显示装置 - Google Patents
阵列基板、图像采集方法及显示装置 Download PDFInfo
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- WO2018201693A1 WO2018201693A1 PCT/CN2017/111318 CN2017111318W WO2018201693A1 WO 2018201693 A1 WO2018201693 A1 WO 2018201693A1 CN 2017111318 W CN2017111318 W CN 2017111318W WO 2018201693 A1 WO2018201693 A1 WO 2018201693A1
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- substrate
- array substrate
- electrodes
- photosensitive
- pixel units
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- 239000000758 substrate Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 47
- 238000001514 detection method Methods 0.000 claims description 30
- 230000000750 progressive effect Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 9
- 229920001621 AMOLED Polymers 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005286 illumination Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3216—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using a passive matrix
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
-
- 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
- H10K59/17—Passive-matrix OLED displays
Definitions
- the present disclosure relates to the field of display technologies, and in particular, to an array substrate, an image acquisition method, and a display device.
- Image collection has been closely related to people's lives, such as the current popular barcode recognition, two-dimensional code recognition, fingerprint recognition or more complex image acquisition. How to integrate image acquisition in the display area of the display has become the focus of the screen integration technology.
- OLED Organic Light-Emitting Diode
- PMOLED Passive Matrix Driving OLED
- AMOLED Active Matrix Driving OLED
- the present disclosure provides an array substrate, an image acquisition method, and a display device.
- an array substrate including:
- a plurality of photosensitive cells are respectively disposed at gaps between the plurality of pixel units.
- the plurality of photosensitive cells are located between the base substrate and the plurality of first electrodes.
- the plurality of photosensitive cells are located in a region of the base substrate that is not covered by the first electrode and is not covered by the second electrode.
- the plurality of pixel units are OLED pixel units.
- the array substrate further includes:
- a photosensitive detecting circuit disposed on the base substrate for collecting the electrical signals output by the plurality of photosensitive cells.
- the photosensitive detection circuit includes an active detection circuit.
- the array substrate further includes:
- a driving unit configured to drive the plurality of pixel units by way of progressive scanning.
- the plurality of photosensitive cells are PIN photosensitive elements or PN junction photosensitive elements.
- an image acquisition method which is applied to the array substrate according to any of the above, comprising:
- spatially modulating the optical signal include:
- the optical signal is spatially modulated by the plurality of pixel units in an alternating light and dark manner.
- a display device comprising the array substrate according to any of the above.
- FIG. 1 is a schematic structural diagram of an array substrate using AMOLED integrated image acquisition technology in a technical solution
- FIG. 2 is a schematic structural diagram of an array substrate using PMOLED integrated image acquisition technology according to an exemplary embodiment of the present disclosure
- FIG. 3 illustrates a schematic structural diagram of an array substrate employing PMOLED integrated image acquisition technology according to another exemplary embodiment of the present disclosure
- FIG. 4 schematically illustrates a top view of an array substrate employing PMOLED integrated image acquisition technology, in accordance with an exemplary embodiment of the present disclosure
- FIG. 5 schematically illustrates a first top view of dot fringe image acquisition, in accordance with an exemplary embodiment of the present disclosure
- FIG. 6 schematically illustrates a second top view of an electric fringe image acquisition, in accordance with an exemplary embodiment of the present disclosure
- FIG. 7 is a schematic diagram showing a detection principle of a photosensor employing an optical amplitude modulation technique according to an exemplary embodiment of the present disclosure
- FIG. 8 schematically illustrates an active detection circuit that collects signals output by a photosensor according to an exemplary embodiment of the present disclosure
- FIG. 9 schematically illustrates a flow chart of an image acquisition method according to an exemplary embodiment of the present disclosure.
- the principle of integrated image acquisition in the display area of the display screen is: due to the different wavelengths of the object, the wavelength of the reflected visible light is different, the black object absorbs visible light of various wavelengths, and the white object reflects visible light of various wavelengths, therefore, from the display
- the display area of the screen generates a light source to be projected onto the bar code or the two-dimensional code, and then the bar code or the two-dimensional code can be solved by utilizing the characteristics of the photosensitive element on the display screen for different light wavelengths (output current).
- the value of the OLED display will be further improved.
- the difficulty in integrating optical image acquisition of the OLED display screen in the prior art is that on the one hand, the optical signal of the display area is often very weak, and It is susceptible to ambient light interference, and current optical sensors are limited by the sensor area, so that it is difficult to collect such weak signals.
- the optical signal of the display area is often very weak, and It is susceptible to ambient light interference, and current optical sensors are limited by the sensor area, so that it is difficult to collect such weak signals.
- due to the existence of pixel circuits on the AMOLED backplane it is difficult to detect optical sensors and sensors. The circuit provides space for placement, resulting in extremely limited detection of optical signals.
- an optical sensor that is, a photosensitive element
- a detection circuit for detecting an optical sensor output signal needs to be disposed on a TFT backplane
- the photosensitive component receives An optical signal emitted by the pixel unit and reflected by the detected object.
- the AMOLED illuminating pixel adopts an active driving manner, it is required to provide a pixel compensation circuit on the TFT back panel, which occupies a large space on the TFT backplane, and thus is difficult to detect for the photosensitive element and the photosensitive element.
- the circuit provides sufficient space for placement; on the other hand, due to the complicated driving method of AMOLED, GOA (Gate Driver on Array) is used to drive the array substrate. Therefore, when the pixel driver needs to be improved, the GOA is difficult to cope with the complexity. Or a specific driving method, so that it is difficult to further improve the image acquisition effect.
- GOA Gate Driver on Array
- the array substrate may include: a substrate substrate 210; a plurality of first electrodes 220 disposed on the substrate substrate 210; and a plurality of second electrodes 230 disposed on the substrate substrate 210 And a projection of the second electrode 230 on the substrate substrate 210 and a projection of the first electrode 220 on the substrate substrate; a plurality of pixel units 240 respectively located at the first electrode 220 between the area facing the second electrode 230; and a plurality of photosensitive cells 250 disposed at the gap of the pixel unit 240 for receiving the plurality of pixel units 240 and reflecting through the detected object
- the optical signal converts the received optical signal into an electrical signal.
- a plurality of photosensitive cells are disposed at the gap of the pixel unit by using a PMOLED pixel structure, since the PMOLED pixel structure does not need to have a pixel circuit disposed on the array substrate, thereby being capable of being photosensitive
- the unit and photosensitive unit detection circuit provide sufficient space; on the other hand, the image is received by the photosensitive unit
- the optical signal emitted by the element and reflected by the detected object because the driving mode of the PMOLED is driven line by line, the signal interference caused by the illumination of the other pixels on the photosensitive element can be reduced, the ambient light interference is reduced, and the signal-to-noise ratio is improved. In turn, a weaker optical signal can be acquired.
- the plurality of photosensitive cells 250 may be located between the substrate substrate 210 and the first electrode 220.
- the photosensitive element may be located in the void region of the pixel unit 240. Further, the photosensitive element may also be located directly under the first electrode 220 and on the gap of the pixel unit 240, or may be located at a gap at the pixel unit 240. Suitable locations are also within the scope of the present disclosure.
- the first electrode may be an ITO anode, that is, an indium tin oxide anode
- the second electrode may be a metal cathode.
- the photosensitive unit 250 may be a PIN photosensitive element or a PN junction photosensitive element.
- the selected plurality of pixel units 240 are driven by the driving circuit to emit light, and when the light emitted from the pixel unit 240 is irradiated to the detected object, a part of the light is reflected to the PIN photosensitive element or the PN.
- the PIN photosensor or PN junction photosensor receives the reflected optical signal and converts the received optical signal into an electrical signal.
- the detection object may be a two-dimensional code or a barcode, but the detection object in the exemplary embodiment of the present disclosure is not limited thereto, for example, the detection object may also be a fingerprint, an iris, or the like, which is also the same. Within the scope of protection of the present disclosure.
- the base substrate 210 may include an OLED backplane and a TFT backplane.
- the TFT backplate and the photosensitive element can be fabricated first, and then the PMOLED device can be fabricated over the photosensitive element.
- the first electrode, the OLED pixel, and the second electrode can be fabricated over the photosensitive element.
- FIG. 4 an arrangement of the photosensitive elements in the void region of the pixel unit is shown in FIG.
- the intersection position of the cathode and the anode is a pixel unit region.
- the PMOLED Since the PMOLED emits only one row of pixels at the same time, it is more accurate than the AMOLED full frame illumination, because if the entire frame is illuminated, the photosensitive sensor located in the first row will receive the first row of pixels and In addition to the reflected light, the reflected light of other rows of pixels may also be received by the photosensor, which may cause blurring of the image of the finally acquired detected object.
- the PMOLED Due to the strip structure of the cathode and the anode, the PMOLED is facilitated to be driven, so that the lead wire can directly enter the driving IC, and a more complicated spatial modulation detection can be realized by adding an appropriate signal to the cathode and the anode.
- the pattern of the backlight can be patterned, and the pixel unit can be spatially modulated, for example, by displaying a specific pattern through the pixel unit, that is, a preset frame, for example, bright and dark alternating.
- the stripe and the alternating bright and dark points spatially modulate the optical signal, thereby reducing the ambient light interference and improving the signal-to-noise ratio.
- the array substrate may further include: a modulating unit, configured to perform the optical signal according to the plurality of preset frames.
- a processing unit configured to obtain a detection result of the detection object according to the electrical signal output by the photosensitive unit in each of the preset frames.
- the pixel unit may be divided into a number of individually controllable "sub-pixels" that may be displayed when a different number of sub-pixels in the pixel unit are gated.
- 5 and 6 illustrate schematic diagrams of spatially modulating an optical signal by displaying a specific pattern, that is, a preset frame, by a pixel unit.
- FIG. 5 is a first top view of a dot stripe-shaped light source of PMOLED optical spatial modulation in the present exemplary embodiment. As can be seen from FIG.
- each unit is divided into two parts, that is, two squares, and the square on the right side is a pixel unit, that is, an OLED light-emitting pixel, and the square on the left side is a light-sensitive element located obliquely above the OLED light-emitting pixel.
- the oled around the photosensitive element marked in the figure is black, which minimizes the interference of other surrounding stray light reflections.
- FIG. 6 is a second top view of an embodiment of a dot stripe-shaped light source for PMOLED optical spatial modulation in the exemplary embodiment
- FIG. 5 and FIG. 6 are two diagrams for performing optical signal detection.
- Two preset frames Figure 5 is similar in structure to Figure 6, but in the black dot position in Figure 6, in Figure 5 is the white point.
- the signal data of all the photosensitive elements in the entire screen can be collected, that is, the optical image of the entire detected object is collected. Therefore, the data collected in FIG. 5 and FIG. 6 can be analyzed and processed, and finally a clear captured image is obtained.
- the image acquisition process of FIG. 5 and FIG. 6 firstly collects two frames of data under the dot stripe backlight as shown in FIG. 5 and FIG. 6, and then analyzes the acquired two frames of image signals, for example, only the nearest frame per frame.
- the signal of the OLED bright photosensitive element can eliminate the noise caused by the peripheral light source, thereby improving the signal-to-noise ratio and achieving image refinement.
- the PMOLED when performing optical image signal acquisition, the PMOLED is required to synchronously display the corresponding picture, and therefore the PMOLED picture display is required, and the image detection needs to satisfy a certain timing relationship, for example, in an alternate manner. Perform screen display and image detection.
- the optical image signal in order to improve the signal-to-noise ratio, can be adjusted by causing the OLED backlight to display a specific pattern. Therefore, the optical signal can be performed by alternately brightening and darking a plurality of pixel units. Spatial modulation.
- the manner of alternating light and dark may include bright and dark alternating stripes, alternating bright and dark dots, and the like, which is not limited thereto in the exemplary embodiments of the present disclosure, and the OLED backlight pattern may adopt a more complicated pattern shape, for example, Various strip shapes, dot center shapes, and the like may be employed, and thus the shape of the backlight pattern pattern displayed by the pixel unit in the exemplary embodiment of the present disclosure is not particularly limited.
- the optical amplitude modulation technique can also be adopted when detecting the electrical signal output by the photosensitive element. Since the PMOLED is directly driven by the driver IC, the driving timing is simpler than that of the AMOLED.
- FIG. 7 when image acquisition is performed on the detected object, a square wave signal of a fixed frequency is generated by the modulator, and the square wave signal is divided into two paths, one for driving the pixel unit to generate light. The modulated optical signal is used for demodulation of the acquired image signal.
- the modulated optical signal is reflected on the detection object, and the reflected modulated light is irradiated onto the photosensitive unit to generate a photocurrent, and the photocurrent first enters the voltage conversion circuit to convert the photocurrent signal into The photovoltage signal then passes through the first filter amplifying circuit and then enters the demodulation circuit for demodulation.
- the extracted analog signal containing the image information is obtained, and after entering the analog-to-digital conversion circuit, the analog signal is converted into a digital signal, and finally output to the processing unit for subsequent processing to obtain the final image information.
- the modulated light can resist the interference of external light, environmental noise and electrical noise, and improve the signal to noise ratio.
- the active detection circuit structure can also be used for acquisition. Since the OLED does not need to use a pixel circuit, there is sufficient detection circuit space on the TFT backplane.
- a 4T-APS (four-tube active pixel sensor) active detection circuit is shown in FIG. 8.
- the 4T-APS active detection circuit may include: reset switch tube T RST , photodiode PD, transmission gate switch TX, read Taking the source follower tube Tsf and the selection switch tube Tsel stored in the parasitic node FD photoelectric signal, wherein the control terminal of the reset switch tube T RST is used to receive the reset signal Reset, the source terminal is connected to the reset voltage terminal Vrst, and the drain terminal Connected to the FD node; the control terminal of the transmission gate switch TX is used to receive the transmission signal TX, the source terminal is connected to the PD, and the drain terminal is connected to the FD; the control terminal of the source follower tube Tsf is connected to the FD node, and the source terminal is connected to the power supply voltage terminal Vdd, the drain The terminal of the selection switch is connected to the source terminal; the control terminal of the selection switch Tsel is for receiving the selection signal Select, and the drain terminal is connected to the external column output bus.
- the detection circuit in FIG. 6 can reduce
- the image collection method may include:
- Step S910 Spatially modulating an optical signal emitted by the plurality of pixel units according to a plurality of preset frames.
- Step S920 The electrical signals output by the plurality of photosensitive cells by the optical amplitude modulation method Collecting.
- Step S930 Obtain a detection result of the detection object according to the electrical signal collected in each of the preset frames.
- spatially modulating the optical signal may include:
- the optical signal is spatially modulated by the plurality of pixel units in an alternating light and dark manner.
- the display device may include any of the array substrates according to the foregoing embodiments. Since the illumination system in the present exemplary embodiment employs the above array substrate, it has at least all the advantages corresponding to the array substrate.
- the display device may be any product or component having a display function, such as an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital camera, etc., which is not specifically limited in the present disclosure. .
- a plurality of photosensitive cells are disposed at a gap of a pixel unit by a PMOLED pixel structure, and an optical signal emitted from the pixel unit and reflected by the detected object is received by the photosensitive cell.
- a plurality of photosensitive cells are disposed at a gap of the pixel unit by using a PMOLED pixel structure. Since the PMOLED pixel structure does not need to have a pixel circuit disposed on the array substrate, the photosensitive cell and the photosensitive cell detecting circuit can be provided with sufficient
- the optical signal emitted from the pixel unit and reflected by the detected object is received by the photosensitive unit. Since the driving mode of the PMOLED is driving line by line, the signal interference caused by the illumination of the other pixels on the photosensitive element can be reduced. It reduces ambient light interference, improves the signal-to-noise ratio, and can acquire weaker optical signals.
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Abstract
Description
Claims (11)
- 一种阵列基板,其中,包括:衬底基板;多个第一电极,设于所述衬底基板之上;多个第二电极,设于多个第一电极之上且所述多个第二电极在所述衬底基板的正投影与所述多个第一电极在所述衬底基板的正投影交叉排列;多个像素单元,分别位于所述多个第一电极在所述衬底基板的正投影与所述多个第二电极在所述衬底基板的正投影的重叠区域内;以及多个光敏单元,分别设于所述多个像素单元之间的间隙处。
- 根据权利要求1所述的阵列基板,其中,所述多个光敏单元位于所述衬底基板与所述多个第一电极之间。
- 根据权利要求1所述的阵列基板,其中,所述多个光敏单元位于所述衬底基板的未被所述第一电极覆盖且未被所述第二电极覆盖的区域内。
- 根据权利要求1所述的阵列基板,其中,所述多个像素单元为OLED像素单元。
- 根据权利要求1所述的阵列基板,其中,所述阵列基板还包括:光敏检测电路,设置在所述衬底基板上,用于对所述多个光敏单元输出的所述电信号进行采集。
- 根据权利要求5所述的阵列基板,其中,所述光敏检测电路包括主动式检测电路。
- 根据权利要求1所述的阵列基板,其中,所述阵列基板还包括:驱动单元,用于通过逐行扫描的方式驱动所述多个像素单元。
- 根据权利要求1所述的阵列基板,其中,所述多个光敏单元为PIN光敏元件或PN结光敏元件。
- 一种图像采集方法,应用于根据权利要求1至8中任一项所 述的阵列基板,其中,包括:根据多个帧对所述多个像素单元发出的光信号进行空间调制;通过光调幅方式对所述多个光敏单元输出的电信号进行采集;以及根据各所述预设帧内采集的所述电信号得到对所述被检测对象的检测结果。
- 根据权利要求9所述的图像采集方法,其中,对所述光信号进行空间调制包括:通过所述多个像素单元以亮暗交替的方式对所述光信号进行空间调制。
- 一种显示装置,其中,包括根据权利要求1至8中任一项所述的阵列基板。
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US15/776,421 US20180323243A1 (en) | 2017-05-02 | 2017-11-16 | Array substrate, image collection method and display device |
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CN107492317B (zh) * | 2017-09-29 | 2024-05-17 | 京东方科技集团股份有限公司 | 一种显示装置 |
CN207517341U (zh) * | 2017-09-30 | 2018-06-19 | 昆山国显光电有限公司 | 显示装置 |
CN107978609B (zh) * | 2017-11-23 | 2020-11-13 | 上海中航光电子有限公司 | 一种阵列基板及显示装置 |
CN108335631B (zh) * | 2018-03-30 | 2020-03-13 | 上海天马微电子有限公司 | 一种显示面板和显示装置 |
CN110865476A (zh) * | 2018-08-28 | 2020-03-06 | 西安易朴通讯技术有限公司 | 一种终端 |
CN111382732B (zh) | 2018-12-28 | 2024-01-23 | 京东方科技集团股份有限公司 | 纹路识别装置以及纹路识别装置的操作方法 |
CN110767704B (zh) * | 2018-12-29 | 2022-04-19 | 云谷(固安)科技有限公司 | 阵列基板、显示屏、复合显示屏及显示装置 |
CN111430407B (zh) * | 2019-01-09 | 2022-09-13 | 昆山工研院新型平板显示技术中心有限公司 | 显示面板、显示面板制备方法及显示设备 |
CN109767725A (zh) * | 2019-03-19 | 2019-05-17 | 京东方科技集团股份有限公司 | 一种像素驱动电路及其驱动方法、显示装置 |
CN112135071B (zh) * | 2019-06-25 | 2023-07-28 | 上海耕岩智能科技有限公司 | 一种图像传感系统 |
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CN103336384A (zh) * | 2013-06-28 | 2013-10-02 | 京东方科技集团股份有限公司 | 一种显示面板 |
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