Sensing circuit and display device having the same
A sensing circuit and display device technology, applied in the direction of measuring force, measuring device, static indicator, etc., can solve the problem of increasing the thickness of the display device
Inactive Publication Date: 2007-02-07
SAMSUNG DISPLAY CO LTD
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Problems solved by technology
Unfortunately, when the display device includes a touch
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A sensing circuit is provided that senses an externally provided pressure on a panel, and includes a sensing capacitor, a first switching element, a second switching element and a third switching element; where the sensing capacitor includes a sensing electrode on the first substrate, the insulating layer and the opposite electrode; the sensing capacitor varies a capacitance based on the externally provided pressure; the first switching element is electrically connected to the sensing electrode to charge the sensing capacitor based on a first switching signal; the second switching element outputs a current based on a second switching signal and a first voltage; the third switching element is electrically connected to the sensing electrode to control the current based on the variation of the capacitance of the sensing capacitor to generate a sensing signal; and where a thickness is decreased, and an image display quality is improved.
Description
technical field [0001] The present invention relates to touch sensing displays. More particularly, the present invention relates to a sensing circuit capable of sensing externally provided pressure and a display device having the sensing circuit. Background technique [0002] Typically, a touch panel senses pressure by a finger or pointer on a display device. The touch panel is on the uppermost part of the display panel. The touch panel detects the position of a finger or a pointer so that the display device generates an output signal. [0003] The touch panel is capable of reading data without a keyboard or mouse. Therefore, touch panels have been widely used. Unfortunately, when the display device includes a touch panel, the thickness of the display device increases. Contents of the invention [0004] The present invention provides a sensing circuit capable of sensing externally provided pressure. The invention also provides a display device with the sensing circui...
Claims
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Login to view more IPC IPC(8): G06F3/044G01L1/14G09G3/36G02F1/133
CPCG02F1/13338G06F3/0416G06F2203/04111G06F3/0447
Inventor 朴商镇崔荣俊崔晚升李柱亨李明雨
Owner SAMSUNG DISPLAY CO LTD
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