Display device and detection method

Details Display device and detection method Display device and detection method

2008-05-23

2010-12-21

Chowdury, Tarifur (Department: 2886)

Optics: measuring and testing

Plural test

C345S104000, C345S207000

Reexamination Certificate

active

07855779

ABSTRACT:
A display device includes display pixels that display an image on a display screen. First and second optical sensors correspond to one or more of the display pixels and detect the amount of incident light. An optical member allows light coming from a first direction to enter the first optical sensors and light coming from a second direction to enter the second optical sensors. A memory circuit stores a first detection result that is detected in a first time period by means of the first optical sensors and stores a second detection result that is detected in the first time period by means of the second optical sensors. A comparison circuit compares sequential detection results to permit a judgment circuit to determine whether the display screen has been touched with a detection target medium.

REFERENCES:
patent: 7321672 (2008-01-01), Sasaki et al.
patent: 2006-244446 (2006-09-01), None

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