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Display panel and preparation method thereof

A display panel, one-sided technology, used in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., can solve the problems of display panel afterimage brightness and decline, and achieve the effect of solving afterimage, improving reliability, and solving brightness decline.

Pending Publication Date: 2022-07-29
WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a display panel to solve the technical problems of afterimage and brightness reduction of display panels in the prior art

Method used

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  • Display panel and preparation method thereof
  • Display panel and preparation method thereof
  • Display panel and preparation method thereof

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Experimental program
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Embodiment 1

[0039] An embodiment of the present invention provides a display panel 100, please refer to figure 1 , figure 1 It is a schematic cross-sectional structure diagram of a display panel 100 according to an embodiment of the present invention. The display panel 100 includes a display area 101 and a non-display area 102 surrounding the display area 101 , and the display panel 100 includes a substrate layer 110 , a functional structure layer 120 and a slot hole 140 .

[0040] The substrate layer 110 extends from the display area 101 to the non-display area 102 , and includes a first flexible substrate 111 , a first buffer layer 112 , a second flexible substrate 113 and a second buffer layer 114 , and the first buffer layer 112 is disposed on the first flexible substrate 111 , the second flexible substrate 113 is disposed on the first buffer layer 112 , and the second buffer layer 114 is disposed on the second flexible substrate 113 .

[0041] The functional structure layer 120 is ...

Embodiment 2

[0076] The structure of the display panel of this embodiment is substantially the same as that of Embodiment 1. For details, please refer to Embodiment 1. The difference is that the driving transistor further includes a third gate layer 130 and a third via hole 163. Please refer to image 3 , image 3 This is a schematic cross-sectional structure diagram of the display panel provided in this embodiment. In this embodiment, the driving transistor further includes a third gate layer 130 and a third via hole 163, the third gate layer 130 is disposed between the second flexible substrate 113 and the second buffer layer 114, and the third via hole 163 extends from the side of the first gate insulating layer 122 away from the first flexible substrate 111 to the side of the third gate layer 130 away from the first flexible substrate 111. The three gate layers 130 are connected.

[0077] The third gate layer 130 of the driving transistor being located under the first active layer 12...

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PUM

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Abstract

The embodiment of the invention discloses a display panel and a preparation method thereof. The display panel comprises a non-display area and a display area surrounding the non-display area. The substrate layer extends from the display area to the non-display area; the functional structure layer is arranged on the substrate layer; wherein the functional structure layer comprises a first active layer and a second active layer, and the first active layer and the second active layer are located on different film layers. The second active layer of the switch transistor is moved upwards, so that the second active layer is far away from the flexible substrate layer, and the influence of back channel etching on the switch transistor is weakened; moreover, the first gate layer of the switch transistor is located below the second active layer, so that the polarization effect of the flexible substrate can be shielded, the reliability of the switch transistor is improved, and the problems of residual images and brightness reduction of the display panel are solved.

Description

technical field [0001] The present invention relates to the field of display panels, in particular to a display panel and a preparation method thereof. Background technique [0002] Compared with the traditional liquid crystal display, the organic light emitting diode (Organic Light Emitting Diode, OLED) display technology, due to the material properties of its flexible substrate PI, makes the reliability of the TFT of the pixel circuit significantly affected by the back channel etching. The reliability of the TFT is a key factor affecting the Luminance Drop. Generally, Image Sticking is also one of the main phenomena of Luminance Drop. [0003] The TFTs that mainly affect the brightness drop include the driver transistor (Driver TFT) and the switch transistor (DualGate TF), the switch transistor is T3. According to the research on the afterimage of the display panel, it is found that T3 is the key factor that affects the brightness drop. [0004] Therefore, it is indeed ...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L51/00H01L21/77
CPCH10K59/1213H10K77/111H10K59/1201
Inventor 张向向
Owner WUHAN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD