Light sensor test unit, method of testing light sensor using the same and display apparatus

Light sensor test unit, method of testing light sensor using the same and display apparatus

In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in...

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Hauptverfasser: Pak, Sang-Jin, Uh, Kee-Han, Maeng, Ho-Suk, Cho, Man-Seung, Cha, Young-Ok
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Sprache:eng
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creator Pak, Sang-Jin
Uh, Kee-Han
Maeng, Ho-Suk
Cho, Man-Seung
Cha, Young-Ok
description In a light sensor test unit, a test circuit is built in a display panel and connected to an output node of a light sensor which senses an intensity of an external light. When external light having a predetermined intensity is provided to the light sensor, the test circuit outputs a driving signal in response to a sensing signal output from the output node. A test pixel part includes pixels selected from a plurality of pixels arranged in the display panel and receives the driving signal from the test circuit to display a gray-scale corresponding to the driving signal. A brightness measurer measures a brightness corresponding to the gray-scale displayed in the test pixel part to compare the measured brightness with a predetermined brightness, thereby testing whether the light sensor built in the display panel is normally operated.
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title Light sensor test unit, method of testing light sensor using the same and display apparatus
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