Unlock instant, AI-driven research and patent intelligence for your innovation.

OLED display substrate, display device and manufacturing method thereof

A technology for displaying substrates and manufacturing methods, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., and can solve problems such as the possibility of receiving light from adjacent pixels, difficulties in cathode patterning, and optical detection interference

Active Publication Date: 2021-08-06
BOE TECH GRP CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for bottom-emitting OLED display products, it is necessary to design part of the cathode area to be light-transmitting, otherwise the light emitted by the organic light-emitting layer cannot pass through the cathode to irradiate the photodetector device, and the cathode of the bottom-emitting OLED display substrate is generally a light-reflecting electrode. And it is evaporated on the whole surface, it is difficult to pattern the cathode
In addition, since the packaging substrate and the OLED display substrate are packaged together by bonding glue, there is a certain distance between the photodetection device and the organic light-emitting layer due to the existence of the bonding glue. The pixels of the OLED display substrate have a one-to-one correspondence. Each photodetector detects the light of the corresponding pixel. interference with optical detection

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • OLED display substrate, display device and manufacturing method thereof
  • OLED display substrate, display device and manufacturing method thereof
  • OLED display substrate, display device and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Such as figure 2 As shown, in this embodiment, the bottom-emitting OLED display substrate includes a driving circuit layer on the second base substrate 7 and a plurality of light-emitting units, and the light-emitting units include a light-transmitting anode, a cathode 4, and an anode and a cathode. The organic light-emitting layer 5 between 4, wherein, 6 shown in the figure includes a driving circuit layer and an anode. When forming the cathode 4 , a low-temperature process can be used to deposit a layer of transparent conductive material with a high thickness as the cathode, such as ITO and IZO. The high thickness can ensure the resistance performance of the cathode 4 .

[0082] After the cathode 4 is formed, a thin film encapsulation layer 8 is formed on the cathode 4 , the thin film encapsulation layer 8 can prevent subsequent processes from affecting the cathode 4 and the organic light-emitting layer 5 .

[0083] Afterwards, a reflective layer 9 is fabricated on ...

Embodiment 2

[0086] Such as image 3 As shown, in this embodiment, the bottom-emitting OLED display substrate includes a driving circuit layer on the second base substrate 7 and a plurality of light-emitting units, and the light-emitting units include a light-transmitting anode, a cathode 4, and an anode and a cathode. The organic light-emitting layer 5 between 4, wherein, 6 shown in the figure includes a driving circuit layer and an anode. When forming the cathode 4 , a low-temperature process can be used to deposit a layer of transparent conductive material with a high thickness as the cathode, such as ITO and IZO. The high thickness can ensure the resistance performance of the cathode 4 .

[0087] After the cathode 4 is formed, a thin film encapsulation layer 8 is formed on the cathode 4 , the thin film encapsulation layer 8 can prevent subsequent processes from affecting the cathode 4 and the organic light-emitting layer 5 .

[0088] Afterwards, a reflective layer 9 is fabricated on t...

Embodiment 3

[0092] Such as Figure 4 As shown, in this embodiment, the bottom-emitting OLED display substrate includes a driving circuit layer on the second base substrate 7 and a plurality of light-emitting units, and the light-emitting units include a light-transmitting anode, a cathode 4, and an anode and a cathode. The organic light-emitting layer 5 between 4, wherein, 6 shown in the figure includes a driving circuit layer and an anode. When forming the cathode 4 , a low-temperature process can be used to deposit a layer of transparent conductive material with a high thickness as the cathode, such as ITO and IZO. The high thickness can ensure the resistance performance of the cathode 4 .

[0093] After the cathode 4 is formed, a reflective layer 9 is formed on the cathode 4. Specifically, a layer of reflective metal material can be formed on the cathode 4, and then the reflective metal material is etched (including wet etching and dry etching) to form a light-transmitting hole. The l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an OLED display substrate, a display device and a manufacturing method thereof, belonging to the field of display technology. Wherein, the OLED display substrate includes a driving circuit layer and a plurality of light-emitting units located on the base substrate, and the light-emitting units include a light-transmitting anode, a cathode, and an organic light-emitting layer located between the anode and the cathode, and the cathode adopts a transparent Conductive material, the OLED display substrate further includes a reflective layer on the side of the cathode facing away from the organic light-emitting layer, and a light-transmitting hole is arranged on the reflective layer. Through the technical scheme of the invention, optical compensation for bottom-emitting OLED display products can be realized.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display substrate, a display device and a manufacturing method thereof. Background technique [0002] Large-size OLED (organic electroluminescent light-emitting diode) display products use optical compensation to compensate for poor display caused by the aging of the organic light-emitting layer. Light, and generate electrical signals according to the received light to output to the drive circuit of OLED display products, so as to realize real-time optical compensation for OLED display products. In bottom-emitting OLED display products, the package substrate can be used as the carrier for the photodetection device, and the light transmitted through the cathode of the OLED display substrate can be used for luminescence detection. The advantage of this solution is that the photodetection device does not need to be prepared on the OLED display substrate, and the thin film ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/52
CPCH10K59/121H10K59/12H10K50/84H10K50/856
Inventor 丁小梁王海生刘英明陈小川祝明张粲玄明花杨盛际邓立凯
Owner BOE TECH GRP CO LTD