OLED display substrate, manufacturing method thereof, and display device
A technology for display substrates and manufacturing methods, which is applied in semiconductor/solid-state device manufacturing, diodes, semiconductor devices, etc., and can solve problems such as the inability to achieve optical compensation for bottom-emitting OLED display substrates
Active Publication Date: 2020-12-08
BOE TECH GRP CO LTD
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[0003] However, in the prior art, the photodetection device is usually designed on the side of the cathode facing away from the anode. Since the large-sized OLED display substrate has high requirements on the conductivity of the cathode, Al is generally used for the cathode. In the bottom-emitting OLED display substrate, Al It will reflect all the light emitted by the organic light-emitting layer to the side of the light-transmitting anode, resulting in no light reaching the photodetection device, so it is impossible to achieve optical compensation for the bottom-emitting OLED display substrate
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[0046] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0047] Such as figure 1 As shown, the existing bottom emission structure OLED display substrate includes an anode 4, an organic light-emitting layer 5 and a cathode 6 located on a second base substrate 3, and also includes an encapsulation layer 7 covering the anode 4, the organic light-emitting layer 5 and the cathode 6 , wherein the cathode 6 is made of reflective metal, and the anode 4 is made of transparent conductive material. Such as figure 1 As shown, the light emitted by the organic light-emitting layer 5 is reflected by the light-reflecting cathode and exits through the side of the anode 4 . A first base substrate 1 and a color filter unit 2 located on the first base substrate 1 are arranged on the light emitting side of the...
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The invention provides an OLED display substrate, a manufacturing method thereof, and a display device, belonging to the field of display technology. Wherein, the OLED display substrate includes: a thin-film transistor array layer located on the base substrate and a plurality of light-emitting units, the light-emitting units include a light-transmitting anode, a light-reflecting cathode, and an organic light-emitting diode between the light-transmitting anode and the light-reflecting cathode. layer; the OLED display substrate also includes: a light-transmitting spacer, the light-reflecting cathode covers the spacer, and the side surface of the spacer is not covered by the light-reflecting cathode or the side surface covered by the light-reflecting cathode The thickness of the part of the side surface of the spacer is smaller than the thickness of other parts of the reflective cathode. Through the technical scheme of the invention, optical compensation for the bottom-emission OLED display substrate can be realized.
Description
technical field [0001] The invention relates to the field of display technology, in particular to an OLED display substrate, a manufacturing method thereof, and a display device. Background technique [0002] The existing large-size OLED (organic electroluminescent diode) display substrate usually adopts a bottom emission scheme. The OLED display substrate with a bottom emission structure adopts a reflective cathode and a transparent anode, and the light emitted by the organic light-emitting layer exits the OLED display substrate through the transparent anode. . The way to optically compensate the OLED display substrate is to use photodetection devices to detect the luminous intensity of the OLED display substrate in real time, and use this as a basis to compensate the light emission of the OLED display substrate, which can optimize the display effect of the OLED display substrate. [0003] However, in the prior art, the photodetection device is usually designed on the side...
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IPC IPC(8): H01L27/32H01L51/52H01L51/56
CPCH10K59/38H10K59/12H10K50/81H10K50/82H10K71/00
Inventor 刘英明陈小川王海生董学丁小梁杨盛际曹学友王雷李昌峰
Owner BOE TECH GRP CO LTD