Touch screen structure to prevent image distortion

Details Touch screen structure to prevent image distortion Touch screen structure to prevent image distortion

2005-04-05

2005-04-05

Nguyen, Chanh (Department: 2675)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C345S087000

Reexamination Certificate

active

06876355

ABSTRACT:
A touch panel-mounted liquid crystal panel minimizes picture distortion upon driving of the touch panel. In the liquid crystal panel, a lower glass substrate has switching devices provided in the vicinity of intersections between data lines and gate lines. An upper glass substrate has a black matrix joined to it. Patterned clusters of spacers are positioned at an area corresponding to the black matrix in such a manner to enlarge its contact area with the upper glass substrate, thereby keeping a uniform distance between the upper and lower glass substrates. The enlarged contact area allows the patterned clusters of spacers to sufficiently absorb a pressure load of a finger or a stylus pen. Accordingly, uniform distance between the upper and lower glass substrates is maintained even upon driving the touch panel. As a result, light deterioration and local image distortion is prevented or minimized.

REFERENCES:
patent: 5852487 (1998-12-01), Fujimori et al.
patent: 6057903 (2000-05-01), Colgan et al.
patent: 6208402 (2001-03-01), Tajima
patent: A60182414 (1985-09-01), None

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