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Device and method for driving touch plate

A drive device and touch panel technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems that the detectable voltage range cannot be obtained and the performance of the touch panel cannot be completely satisfactory.

Inactive Publication Date: 2003-07-09
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the reference voltage of the analog-to-digital converter is usually 5V, the detectable voltage range of about 0.4-4.6V cannot be obtained in the active area of ​​the touchpad far from the opposite electrode
Therefore, the performance of the prior art touch panel is not fully satisfactory

Method used

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  • Device and method for driving touch plate
  • Device and method for driving touch plate
  • Device and method for driving touch plate

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0020] Preferred embodiments of the present invention will be described in detail below with reference to the examples shown in the accompanying drawings.

[0021] Figure 4 A touch panel drive device according to an embodiment of the present invention is shown. exist Figure 4 Among them, the touch panel driving device may include: a touch panel driver 30; a controller 32 for controlling the touch panel driver 30; and an analog-to-digital (A / D) converter 34 connected between the touch panel driver 30 and the controller 32 . The touch panel driver 30 may include: a touch panel having a pair of square resistance layers 20 and 22; and a driving circuit (not shown) for driving the touch panel. The resistance layers 20 and 22 may be formed facing each other with a certain gap therebetween. Also, the resistance layer 20 may have a first electrode a1 and a second electrode a2 formed to face each other along an edge of the resistance layer 20 in the 'X' direction. The resistance l...

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PUM

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Abstract

An apparatus and a method of driving a touch panel that increases an analog-digital converting range includes a first resistive layer having first and second electrodes formed facing each other along opposing edges of the first resistive layer in a first direction, and a second resistive layer having third and fourth electrodes formed facing each other along opposing edges of the second resistive layer in a second direction. The apparatus also includes a high potential controller for selectively connecting one of the first and third electrodes to a high potential voltage supplied from a high potential voltage source and a low potential controller for selectively connecting one of the second and fourth electrodes to a low potential voltage. Further, a variable resistor is employed for reducing a voltage of the high potential voltage between the high potential controller and the high potential power voltage source.

Description

technical field [0001] The present invention relates to an apparatus and method for driving a touch panel, and in particular to an apparatus and method for driving a touch panel, which increases an analog-to-digital conversion range to improve efficiency. Background technique [0002] Generally, a resistive touch panel includes two resistive layers facing each other with a gap therebetween. One of the two resistive layers has a first pair of electrodes formed facing each other along edges of the resistive layer in the "X" direction, and the other resistive layer has electrodes facing each other along edges of the other resistive layer in the "Y" direction. pair to form a second pair of electrodes. Thus, a current is applied alternately through the electrodes in each resistive layer, thereby producing a voltage across each resistive layer. Therefore, when a user presses the touch panel, the two resistive layers contact each other at the position pressed by the user to form ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/045G06F3/033G06F3/041H01H13/712
CPCG06F3/045G06F3/041
Inventor 孔南零
Owner LG DISPLAY CO LTD