Optical sensor and display



<P>PROBLEM TO BE SOLVED: To solve such problems that conventionally, in the case that optical sensors are included in a display device, separate modules manufactured in separate steps are incorporated in the same casing, but reduction in the number of parts and in costs cannot be achieved and reduction in size and thickness of the display device has not been realized. <P>SOLUTION: An optical sensor is realized by use of a TFT provided on an insulating substrate. The TFT is used as the optical sensor by detecting a photocurrent generated by incident ambient light when the TFT is off. By increasing a gate width W of the TFT, a region where the photocurrent is generated is increased, and the optical sensor with good sensitivity is realized. Moreover, since the optical sensor can be realized by use of a TFT provided on a glass substrate, the optical sensor can be incorporated into the same substrate as that of an EL display device. <P>COPYRIGHT: (C)2005,JPO&NCIPI
【課題】 従来、光センサを表示装置に備える場合、別工程で製造された別モジュールを同一筐体に組み込んでいた。しかし、部品点数やコストの削減が図れず、表示装置の小型化、薄型化も進まなかった。 【解決手段】 絶縁基板上に設けるTFTで光センサを実現する。TFTのオフ時に外光が入射することで発生するフォトカレントを検知して光センサとして利用する。TFTのゲート幅Wを大きくすることで、フォトカレントの発生領域を増やし、感度の良い光センサを実現する。また、ガラス基板上に設けるTFTで実現できるので、EL表示装置と同一基板に作りこむことができる。 【選択図】 図1




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Cited By (3)

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    CN-101847343-ASeptember 29, 2010索尼公司Display panel and display device
    US-7843132-B2November 30, 2010Samsung Electronics Co., Ltd.Display device having light emitting element
    US-7936427-B2May 03, 2011Samsung Mobile Display Co., Ltd.Optical sensor for detecting peripheral light and liquid crystal display device using the same