TOUCH PANEL AND PORTABLE ELECTRONIC DEVICE THEREOF
First Claim
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1. A touch panel, comprising:
- a first substrate;
a plurality of pixel structures, arranged on the first substrate in an array, wherein at least one first pixel structure in each M×
N pixel structures comprises a first sensing area, where M and N are positive integers, and the first pixel structure comprises;
an active device, disposed on the first substrate and located at the first sensing area, wherein the active device is electrically connected to a scan line and a readout line, and a passivation layer covers the active device; and
a sensing electrode, disposed on the passivation layer and located at the first sensing area, wherein the sensing electrode is electrically connected to the readout line through the active device, and a portion of the scan line is located between the first sensing area and the sensing electrode to form a reference capacitor;
a second substrate, having a second sensing area corresponding to the first sensing area;
a black matrix layer, disposed on the second substrate and located at the second sensing area;
a spacer, disposed on the black matrix layer and located at the second sensing area; and
a common electrode, covering a portion of the black matrix layer and the spacer, wherein there is a pitch between the common electrode on the spacer and the sensing electrode to form a sensing capacitor.
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Abstract
A touch panel and a portable electronic device thereof are provided. The present invention can accurately determine a position touched by a user on the touch panel by judging whether or not a potential voltage value between a reference capacitor and a sensing capacitor of a pixel having a sensing area being changed, or to determine whether a switch of a pixel having the sensing area being conducted.
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Citations
6 Claims
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1. A touch panel, comprising:
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a first substrate; a plurality of pixel structures, arranged on the first substrate in an array, wherein at least one first pixel structure in each M×
N pixel structures comprises a first sensing area, where M and N are positive integers, and the first pixel structure comprises;an active device, disposed on the first substrate and located at the first sensing area, wherein the active device is electrically connected to a scan line and a readout line, and a passivation layer covers the active device; and a sensing electrode, disposed on the passivation layer and located at the first sensing area, wherein the sensing electrode is electrically connected to the readout line through the active device, and a portion of the scan line is located between the first sensing area and the sensing electrode to form a reference capacitor; a second substrate, having a second sensing area corresponding to the first sensing area; a black matrix layer, disposed on the second substrate and located at the second sensing area; a spacer, disposed on the black matrix layer and located at the second sensing area; and a common electrode, covering a portion of the black matrix layer and the spacer, wherein there is a pitch between the common electrode on the spacer and the sensing electrode to form a sensing capacitor. - View Dependent Claims (2, 3)
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4. A touch panel, comprising:
a plurality of pixel circuits arranged in an array, wherein at least one first pixel circuit in each M×
N pixel circuits comprises;an active device, having a gate, a source and a drain, wherein the gate is electrically connected to a scan line, and the source is electrically connected to a readout line; a reference capacitor, electrically connected between the scan line and the drain; and a sensing capacitor, electrically connected between the drain and a common electrode, where M and N are positive integers. - View Dependent Claims (5, 6)
Specification