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Photo sensor and flat panel display device using thereof

一种光传感器、光电二极管的技术，应用在半导体/固态器件制造、测量装置、辨认装置等方向，能够解决电流忽略等问题

Active Publication Date: 2009-08-19
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the ambient temperature rises to a predetermined level, the temperature-generated current in the photodiode becomes significantly larger than the light-generated current, possibly making the light-generated current negligible

Method used

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  • Photo sensor and flat panel display device using thereof
  • Photo sensor and flat panel display device using thereof
  • Photo sensor and flat panel display device using thereof

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Embodiment Construction

[0023] In the following detailed description, only certain embodiments of the invention are shown and described, by way of illustration. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit and scope of the present invention. Accordingly, the drawings and descriptions are to be regarded as illustrative in nature and not restrictive. In addition, when an element is referred to as being "on" another element, it can be directly on the element or be indirectly on the element with one or more intervening elements interposed therebetween. When a first element is described as being coupled to a second element, the first element may be not only coupled to the second element but also coupled to the second element through a third element. Also, when an element is referred to as being "connected to" another element, it can be directly connected to the element or be indirectly connected to th...

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PUM

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Abstract

A photo sensor that is capable of generating a photo sensing signal corresponding only to ambient light by comprehending changes in electrical current depending on the change of temperature and compensating for the electrical current according the change of temperature and a flat panel display device using the photo sensor, and the photo sensor including a photo sensing unit generating a first current corresponding to an ambient light and a second current corresponding to an ambient temperature; a temperature compensating unit including a dark diode generating a third current having a same magnitude as the second current, corresponding to the ambient temperature due to block of light to be incident; and a buffer unit outputting a light sensing signal corresponding to current having the same magnitude as the first current by subtracting the third current generated in the temperature compensating unit from the second current generated in the photo sensing unit.

Description

[0001] Cross References to Related Applications [0002] This application refers to and claims all rights and interests in an earlier application "Light sensor and flat panel display using the same" filed with the Korean Intellectual Property Office on February 13, 2008 and duly assigned serial number No. 10-2008-0013032 , and incorporates that application here. technical field [0003] The present invention relates to a photosensor, a flat panel display device using the photosensor, and a method of manufacturing a dark diode, and more particularly, to a photosensor outputting a signal only in response to light, and a flat panel display device using the photosensor. Background technique [0004] Recently, various flat panel display (FPD) devices having reduced weight and volume, which are obstacles in cathode ray tubes (CRTs), have been developed. As flat panel display devices, there are liquid crystal display devices, field emission display devices, plasma display panels, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/30H01L27/32H01L51/42H01L51/48G02F1/133G09F9/00G09G3/18G09G3/20G09G3/30G09G3/36H01L31/10H01L51/50
CPCG09G3/3208G09G2320/041G09G2330/021H01L31/105H01L27/3269H01L27/14692G09G2360/144H10K59/13G01J1/02H05B33/02
Inventor 金度晔松枝洋二郎金襟男
Owner SAMSUNG DISPLAY CO LTD