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Ambient light sensing circuit and flat panel display including ambient light sensing circuit

An ambient light detection, ambient light technology, applied in measurement circuits, photometry, static indicators, etc., can solve the problems of increased size, thickness and power consumption of flat panel displays

Active Publication Date: 2011-06-29
SAMSUNG DISPLAY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if an ambient light detection circuit for detecting ambient brightness is electrically coupled to the main substrate, the size, thickness, and power consumption of the flat panel display increase.

Method used

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  • Ambient light sensing circuit and flat panel display including ambient light sensing circuit
  • Ambient light sensing circuit and flat panel display including ambient light sensing circuit
  • Ambient light sensing circuit and flat panel display including ambient light sensing circuit

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Embodiment Construction

[0042] Korean Patent Application Nos. 10-2006-0135381, 10-2006-0135382, 10 filed with the Korean Intellectual Property Office on Dec. 27, 2006, entitled "Ambient Light Detection Circuit and Flat Panel Display Including Ambient Light Detection Circuit" -2006-0135383 and 10-2006-0135384 are hereby incorporated by reference in their entirety.

[0043] Embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. Aspects of the invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the dimensions of layers and regions may be exaggerated for clarity.

[0044] It will be understood that when an element is referred t...

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PUM

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Abstract

An ambient light sensing circuit includes a transistor, a first storage capacitor coupled to the transistor and adapted to compensate for a threshold voltage of the transistor, a second storage capacitor coupled to the first storage capacitor, a photodiode coupled to the first storage capacitor and the second storage capacitor and adapted to change a coupling voltage of the first and second storage capacitors based on ambient light incident thereon, a first switch adapted to selectively apply the first power supply voltage to the output load coupled to the transistor, and a second switch coupled to a first electrode of the transistor and the output load, and adapted to allow a charge stored in the storage capacitor to be discharged through the transistor based on the coupling voltage of the first storage capacitor and the second storage capacitor.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application Nos. 10-2006-0135381, 10-2006-0135382, 10-2006-0135383 and 10-2006-0135384 filed on December 27, 2006, the entire contents of these Korean Patent Applications Incorporated herein by reference. technical field [0003] Embodiments relate to an ambient light detection circuit and a flat panel display including the ambient light detection circuit. Background technique [0004] Flat panel displays include organic light emitting displays, liquid crystal displays, plasma displays, and field emission displays, among others. These flat panel displays are thinner, lighter and consume less power than traditional cathode ray tube (CRT) displays. Among flat panel displays, organic light emitting displays and liquid crystal displays are generally more widely used as displays of portable electronic devices because their size reduction is relatively easy and battery l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J1/46G09G3/20G09G5/10G09G3/30G09G3/36
CPCG01J1/44G01J11/00G01J2001/446G09G3/2088G09G3/32G09G3/3611
Inventor 权五敬
Owner SAMSUNG DISPLAY CO LTD