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Ambient light detection circuit

A technology of ambient light detection and light detection, which is applied to static indicators, instruments, etc., can solve problems such as poor stability and photoelectric curve drift, and achieve the effects of improving stability, saving occupied area, and reducing costs

Active Publication Date: 2020-11-03
KUSN INFOVISION OPTOELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the ambient light detection circuit of the prior art has the following problems: the stability of the ambient light detection circuit of the prior art is poor, and after working for a long time, the phenomenon of photoelectric curve drift will occur

Method used

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Embodiment Construction

[0034] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.

[0035] In the following, many specific details of the present invention, such as structures, materials, dimensions, processes and techniques of components, are described for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.

[0036] It should be understood that in the following description, a "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical or electromagnetic connections. When an element or circuit is said to be "connected to" another element or an...

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Abstract

The invention discloses ambient light detection circuits. A circuit comprises a light detection module which is used for outputting a light induction voltage corresponding to ambient light intensity;and a gate voltage generation module which is used for generating an alternating current gate voltage signal according to a reference voltage signal, wherein the gate voltage signal is used for providing a working bias voltage to the light detection module. A photoelectric curve drift phenomenon occurring after a bias voltage is applied to a gate of a light induction sensor for an excessively longtime, and stability of the ambient light detection circuits is improved.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular to an ambient light detection circuit for a display device. Background technique [0002] A liquid crystal display device is a display device that uses the phenomenon that the alignment direction of liquid crystal molecules changes under the action of an electric field to change the transmittance of a light source. Due to the advantages of good display quality, small size and low power consumption, liquid crystal display devices have been widely used in mobile terminals such as mobile phones and large-sized display panels such as flat-panel televisions. Most of the liquid crystal displays currently on the market are projection type liquid crystal displays, which include a liquid crystal panel and a backlight module. The working principle of the liquid crystal panel is to place liquid crystal molecules between two parallel glass substrates, and apply a driving voltage o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/34G09G3/36
CPCG09G3/3406G09G3/36G09G2320/0626
Inventor 樊伟锋张大雷卢佳惠
Owner KUSN INFOVISION OPTOELECTRONICS