TOUCH DISPLAY DEVICE

• US 20160216820A1
• Filed: 01/07/2016
• Published: 07/28/2016
• Est. Priority Date: 01/27/2015
• Status: Active Grant

• Current Assignee: InnoLux Corporation
• Original Assignee: InnoLux Corporation
• Inventors: CHANG, Yu-Che, CHEN, Hung-Hsun, SUNG, Li-Wei, KAO, Yu-Chien, CHOU, Hsieh-Li, HUANG, Yu-Ti, CHEN, Chung-Le
• Granted Patent: US 10,146,346 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch display device including a touch display panel and a data line driving circuit is provided. The touch display panel includes a plurality of pixels and a first shift register unit. The first shift register unit provides a first shifted signal to a first portion of the pixels. A first transistor receives a clock signal, is coupled to an output node, and outputs the first shifted signal. A second transistor receives a first trigger signal, is coupled to the first transistor. A third transistor is coupled to the second transistor, receives a first operation voltage and a second trigger signal. A fourth transistor is coupled to the first source, receives a second operation voltage and the second trigger signal. A capacitor is coupled between the first transistor and stacked by a first metal layer, a second metal layer, and a third metal layer.

Claims

1. A touch display device, comprising:

a touch display panel comprising;

a plurality of pixels; and

a first shift register unit configured to provide a first shifted signal to a first portion of the pixels and comprising;

a first transistor comprising a first drain receiving a clock signal, a first source coupled to an output node, and a first gate outputting the first shifted signal;

a second transistor comprising a second drain receiving a first trigger signal, a second source coupled to the first gate, and a second gate coupled to the second drain;

a third transistor comprising a third drain coupled to the second source, a third source receiving a first operation voltage, and a third gate receiving a second trigger signal;

a fourth transistor comprising a fourth drain coupled to the first source, a fourth source receiving a second operation voltage, and a fourth gate receiving the second trigger signal; and

a capacitor coupled between the first gate and the first source and stacked by a first metal layer, a second metal layer, and a third metal layer; and

a data line driving circuit configured to provide a plurality of data signals to the pixels.

2. The touch display device as claimed in claim 1, wherein in a display mode, the second operation voltage is at a first level, and in a touch sensing mode, the second operation voltage is at a second level greater than the first level.

3. The touch display device as claimed in claim 2, wherein in the display mode and the touch sensing mode, the first operation voltage is at the first level.

4. The touch display device as claimed in claim 2, wherein the first metal layer comprises a scan line configured to transmit the first shifted signal, the second metal layer comprises a data line configured to transmit one of the data signals, and the third metal layer comprises a common electrode,

wherein in the display mode, the the common electrode receives a common voltage, and in the touch sensing mode, the common electrode stops receiving the common voltage.

5. The touch display device as claimed in claim 1, further comprising:

a second shift register unit generating a second shifted signal to a second portion of the pixels according to a start signal; and

a third shift register unit generating a third shifted signal to a third portion of the pixels according to the first shifted signal, wherein the third shifted signal is served as the second trigger signal.

6. The touch display device as claimed in claim 5, wherein the second shifted signal is served as the first trigger signal, and the first trigger signal is a DC signal.

7. The touch display device as claimed in claim 1, further comprising:

a fifth transistor coupled between the second and third transistors; and

a sixth transistor coupled between the third and fifth transistors, wherein the fifth transistor comprises a fifth drain coupled to the second source, a fifth source, and a fifth gate coupled to the fifth drain, and the sixth transistor comprises a sixth drain coupled to the fifth source, a sixth source coupled to the third drain, and a sixth gate receiving the second trigger signal.

8. The touch display device as claimed in claim 1, wherein the first metal layer comprises a mask electrode, the second metal layer comprises a scan line configured to transmit the first shifted signal, and the third metal layer comprises a data line configured to transmit one of the data signals.

9. A touch display device comprising:

a substrate comprising a plurality of pixels and a gate on panel (GOP) circuit comprising a first shift register unit, wherein the first shift register unit is configured to provide a first shifted signal to a portion of the pixels and comprises;

a first transistor comprising a first drain receiving a clock signal, a first source coupled to an output node to output the first shifted signal, and a first gate;

a second transistor comprising a second drain receiving a first trigger signal, a second source coupled to the first gate, and a second gate coupled to the second drain;

a third transistor comprising a third drain coupled to the second source, a third source a first operation voltage, and a third gate receiving a second trigger signal;

a fourth transistor comprising a fourth drain coupled to the first source, a fourth source receiving a second operation voltage, and a fourth gate receiving the second trigger signal; and

a capacitor coupled to the first gate and the first source and stacked by a first metal layer, a second metal layer, and a third metal layer;

a data line driving circuit configured to provide a plurality of data signals to the pixels;

a sensing electrode formed on the substrate;

a liquid-crystal layer disposed on the sensing electrode; and

a color filter layer disposed on the liquid-crystal layer.

10. The touch display device as claimed in claim 9, wherein the first metal layer comprises a mask electrode, the second metal layer comprises a scan line configured to transmit the first shifted signal, and the third metal layer comprises a data line configured to transmit one of the data signals.

11. The touch display device as claimed in claim 10, wherein the first metal layer comprises a scan line configured to transmit the first shifted signal, the second metal layer comprises a data line configured to transmit one of the data signals, and the third metal layer comprises the sensing electrode,

wherein in a display mode, the sensing electrode receives a common voltage, and in a touch sensing mode, the sensing electrode stops receiving the common voltage.

12. The touch display device as claimed in claim 10, wherein the substrate is an in-cell touch panel.