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Current type pixel driving circuit and method suitable for multiple power supplies

A pixel driving circuit, current-mode technology, applied in the field of current-mode pixel unit driving circuits, can solve problems such as breakdown of low-voltage transistors

Pending Publication Date: 2020-09-25
天津中科新显科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the high-voltage transistor is directly connected in series with the low-voltage transistor, there will be reliability problems, and the low-voltage transistor may be broken down when it withstands a higher voltage.

Method used

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  • Current type pixel driving circuit and method suitable for multiple power supplies
  • Current type pixel driving circuit and method suitable for multiple power supplies
  • Current type pixel driving circuit and method suitable for multiple power supplies

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Embodiment Construction

[0023] In order to better understand the present invention, the present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0024] The present invention provides a current-type pixel driving circuit suitable for multiple power sources. The current-type pixel driving circuit includes: a pixel driving circuit; a sampling and holding circuit; and a clamping circuit, which is connected to the sampling and holding circuit and the pixel driving circuit. Between the circuits; the clamping circuit is used to sample and hold the voltage of the circuit, so that the working voltage of the pixel driving circuit conforms to the working voltage of the sampling and holding circuit.

[0025] The current-type pixel drive circuit is composed of a sample-and-hold circuit and a pixel drive circuit. In the prior art, both the sample-and-hold circuit and the pixel drive circuit use high-voltage transistors with high withstand voltage, so th...

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Abstract

The invention provides a current type pixel driving circuit and method suitable for multiple power supplies. The circuit comprises a pixel driving circuit; a sample hold circuit; and a clamping circuit which is connected between the sampling and holding circuit and the pixel driving circuit, wherein the clamping circuit is used for clamping the voltage of the sampling and holding circuit, so the working voltage of the pixel driving circuit conforms to the working voltage of the sampling and holding circuit. According to the current type pixel driving circuit suitable for multiple power supplies, a high-voltage transistor is adopted in the pixel driving circuit; meanwhile, a low-voltage transistor is adopted in the sampling and holding circuit, and due to the fact that the clamping circuitis introduced, the reliability problem cannot be generated; therefore, the signal processing circuits all adopt low-voltage transistors, the performance of the circuits is improved, and the area of achip is saved.

Description

technical field [0001] The invention relates to a current-type pixel unit drive circuit for self-luminous display, in particular to a current-type pixel drive circuit and method suitable for multiple power sources. Background technique [0002] In recent years, with the development of AR (Augmented Reality, augmented reality) / VR ((Virtual Reality, virtual reality) technology, the closely related micro-display technology has also received extensive attention. Micro-display (Microdisplay) technology is a display A branch of the technical field generally refers to displays whose diagonal size is less than 1 inch (2.54cm) or those that are small enough to require optical amplification as microdisplays. Currently common microdisplay technologies include OLEDoS (Organic Light-Emitting Diode on Silicon , Silicon-based organic light emitting), LEDoS (Light Emitting Diode on Silicon, silicon-based diode light emitting), LCoS (Liquid Crystal on Silicon, liquid crystal on silicon) and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09G3/3233
CPCG09G3/32G09G3/3233
Inventor 赵博华黄苒
Owner 天津中科新显科技有限公司