Display panel and display device

A technology for display panels and flexible substrates, applied in electrical components, transistors, electrical solid-state devices, etc., can solve problems such as decreased screen display effect, threshold voltage shift, abnormal grayscale display, etc., to achieve normal display and prevent leakage. problems, the effect of improving stability

Pending Publication Date: 2020-03-24
HEFEI VISIONOX TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] The inventors have found that there are at least the following problems in the prior art: the threshold voltage of the polysilicon active layer is prone to drift

Method used

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  • Display panel and display device
  • Display panel and display device
  • Display panel and display device

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Example Embodiment

[0022] Analysis has found that in low-temperature polysilicon TFT display panels, the polysilicon active layer is prone to threshold voltage drift when exposed to light, which affects the display effect of the display panel. For example, for an AMOLED display device, external light and self-luminescence of the display device that has been emitted multiple times (from the cathode metal layer and the source / drain metal layer) will irradiate the polysilicon active layer of the transistor. The valence band electrons in the source layer and the electrons trapped in the band gap defect energy level can easily absorb energy and transition to the conduction band, generating photo-generated electron-hole pairs, causing the threshold voltage of the transistor to shift, resulting in abnormal grayscale display. The display effect is reduced.

[0023] To this end, an embodiment of the present invention provides a display panel, including: a first flexible substrate and a second flexible subst...

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PUM

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Abstract

The embodiment of the invention relates to the technical field of display, and discloses a display panel and a display device. In the present invention, an amorphous silicon light absorption layer isarranged between a first flexible substrate and a polycrystalline silicon active layer of the display panel; the forbidden band width of the amorphous silicon is similar to the forbidden band width ofthe polycrystalline silicon; the amorphous silicon light absorption layer is arranged to effectively absorb self-luminous external light displayed by the panel and reflected external light, so that the amount of light entering the polycrystalline silicon active layer is reduced, the problem of electric leakage caused by photo-induced electron-hole pairs generated by the polycrystalline silicon active layer is prevented, the stability of the picture display effect is improved, and normal display is facilitated during gray-scale display.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technologies, and in particular, to a display panel and a display device. Background technique [0002] The optical fingerprint recognition AMOLED (Active-Matrix Organic Light-Emitting Diode, active-matrix organic light-emitting diode) display device mainly includes a TFT (Thin Film Transistor, thin-film transistor) array substrate and various functional layers of the AMOLED. Among them, for the TFT array substrate, according to the different materials of the active layer, the array substrate can be divided into amorphous silicon (amorphous-Silicon), low temperature polysilicon (Low Temperature Poly-Silicon, LTPS for short), high temperature polysilicon (High Temperature Poly-Silicon). Silicon, referred to as HTPS), oxide and other types. Among them, compared with other types of array substrates, the low-temperature polysilicon array substrate has the advantages of faster electron tra...

Claims

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Application Information

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IPC IPC(8): H01L27/32H01L29/786
CPCH01L29/78633H01L29/78672H10K59/1213
Inventor 李阳孙剑秋李素华李勃于锋
Owner HEFEI VISIONOX TECH CO LTD
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