In-cell touch screen panel, method of driving in-cell touch screen panel, and display device

Patent metadata

Field	Value
Publication number	US-2016349882-A1
Application number	US-201615168667-A
Country	US
Kind code	A1
Filing date	May 31, 2016
Priority date	Jun 1, 2015
Publication date	Dec 1, 2016
Grant date	—

Abstract

An in-cell touch screen panel is disclosed. The in-cell touch screen panel includes a capacitive touch control circuit, a control module and a dermatoglyphics identification circuit. The capacitive touch control circuit is configured to determine a touch control position. The control module is configured to determine a dermatoglyphics scan region on basis of the touch control position, and send a dermatoglyphics scan signal to the dermatoglyphics identification circuit. The dermatoglyphics identification circuit is configured to scan the dermatoglyphics in the dermatoglyphics scan region to produce identification signals responsive to the dermatoglyphics scan signals, and send the identification signals to the control module. The control module processes the identification signals. A method of driving the in-cell touch screen panel and a display apparatus comprising the in-cell touch screen panel are further disclosed.

First claim

What is claimed is:

1 . An in-cell touch screen panel comprising: a capacitive touch control circuit, a control module and a dermatoglyphics identification circuit, wherein
the capacitive touch control circuit comprises a plurality of capacitive touch control electrodes and a touch control detection chip, the touch control detection chip is connected with each of the capacitive touch control electrodes and is configured to determine a touch control position by detecting variation of capacitance of the capacitive touch control electrodes; the control module is configured to determine a dermatoglyphics scan region on basis of the touch control position, and to transmit dermatoglyphics scan signals to the dermatoglyphics identification circuit; the dermatoglyphics identification circuit is configured to scan a dermatoglyphics in the dermatoglyphics scan region to produce identification signals responsive to the dermatoglyphics scan signals, and send the identification signals to the control module, and the control module is configured to process the identification signals.

2 . The in-cell touch screen panel according to claim 1 , wherein the dermatoglyphics identification circuit comprises a plurality of photosensitive touch control circuits, a plurality of dermatoglyphics touch control scan lines, and a plurality of dermatoglyphics touch control read lines;
the photosensitive touch control circuits are arranged in a matrix, the respective touch control scan lines are connected with respective rows of photosensitive touch control circuits correspondingly, and the respective dermatoglyphics touch control read lines are connected with respective columns of photosensitive touch control circuits correspondingly.

3 . The in-cell touch screen panel according to claim 2 , wherein the control module are connected with the capacitive touch control circuit, the dermatoglyphics touch control scan lines, and the dermatoglyphics touch control read lines respectively, wherein
the control module is configured to output dermatoglyphics scan signals to the dermatoglyphics touch control scan lines corresponding to the dermatoglyphics scan region; the photosensitive touch control circuit outputs the identification signals to the dermatoglyphics touch control read lines upon receiving the dermatoglyphics scan signals through the dermatoglyphics touch control scan lines; and the control module is configured to read the identification signals through the dermatoglyphics touch control read lines.

4 . The in-cell touch screen panel according to claim 1 , wherein each of the photosensitive touch control circuits comprises a photosensitive unit and a touch control read unit, wherein
the photosensitive unit is configured to produce an identification signal upon receiving light which is emitted from a light source and is reflected to the photosensitive unit when skin touches the touch screen panel, and provide the identification signal to the touch control read unit; and the touch control read unit is configured to connect with a corresponding dermatoglyphics touch control scan line, and output the identification signal to the dermatoglyphics touch control read line upon the dermatoglyphics scan signal being received over the corresponding dermatoglyphics touch control scan line.

5 . The in-cell touch screen panel according to claim 4 , wherein the photosensitive unit comprises a photosensitive transistor, a source electrode and a gate electrode of the photosensitive transistor are connected with a reference signal end, and a drain electrode of the photosensitive transistor is configured to output the identification signal.

6 . The in-cell touch screen panel according to claim 5 , wherein the in-cell touch screen panel further comprises sub-pixels arranged in a matrix, and the photosensitive transistors of the photosensitive units and switch transistors of the sub-pixels are provided in a same layer.

7 . The in-cell touch screen panel according to claim 6 , wherein the touch control read unit comprises a switch transistor;
a source electrode of the switch transistor is configured to receive the identification signal, a gate electrode of the switch transistor is configured to receive a dermatoglyphics scan signal, and a drain electrode of the switch transistor is configured to output an identification signal.

8 . The in-cell touch screen panel according to claim 7 , wherein the in-cell touch screen panel further comprises sub-pixels arranged in a matrix, and the photosensitive transistors of the touch control read units and the switch transistors of the sub-pixels are provided in a same layer.

9 . The in-cell touch screen panel according to claim 4 , wherein
the photosensitive touch control circuit further comprises a capacitor, one terminal of the capacitor is connected with a junction between the output terminal of the photosensitive unit and the input terminal of the touch control read unit, and the other terminal end of the capacitor is connected with a reference signal end.

10 . The in-cell touch screen panel according to claim 4 , wherein at least one of gate signal line of the touch screen panel is configured to be at least one of dermatoglyphics touch control scan lines.

11 . The in-cell touch screen panel according to claim 4 , wherein the control module comprises
a region determination unit, configured to determine the dermatoglyphics scan region on basis of the touch control position; a signal output unit, configured to output the dermatoglyphics scan signals to the dermatoglyphics touch control scan lines corresponding to the dermatoglyphics scan region; and a signal process unit, configured to process the identification signals output from the dermatoglyphics touch control read lines corresponding to the dermatoglyphics scan region.

12 . The in-cell touch screen panel according to claim 11 , wherein
the signal process unit is configured to compare an identification signal output from one dermatoglyphics touch control read line corresponding to the dermatoglyphics scan region with an identification signal output from its adjacent dermatoglyphics touch control read line and to amplify a signal difference therebetween.

13 . The in-cell touch screen panel according to claim 12 , wherein the signal process unit comprises at least one differential amplifier, and the at least one differential amplifier is configured to amplify the signal difference.

14 . The in-cell touch screen panel according to claim 13 , wherein at least two adjacent dermatoglyphics touch control read lines are connected with a same differential amplifier by a control switch.

15 . A display apparatus, comprising the in-cell touch screen panel of claim 1 .

16 . A method of driving an in-cell touch screen panel, comprising:
detecting a touch control position on the in-cell touch screen panel touched by skin; determining a dermatoglyphics scan region from the touch control position; identifying the dermatoglyphics in the dermatoglyphics scan region and producing identification signals; and processing the identification signals.

17 . The method according to claim 10 , wherein the dermatoglyphics scan region is a region where the touch control position is positioned.

18 . The method according to claim 17 , wherein an operation of identifying the dermatoglyphics in the dermatoglyphics scan region and producing the identification signals comprises:
identifying the corresponding position to be a ridge or a furrow of dermatoglyphics, according to different light intensit

Assignees

• Boe Technology Group Co Ltd
• Beijing Boe Optoelectronics Tech Co Ltd

Inventors

• Liu Yingming
• Dong Xue
• Wang Haisheng
• Chen Xiaochuan
• Yang Shengji
• Yang Ming
• Liu Wei
• Liu Hongjuan
• Wang Qian

Classifications

• G06F2203/04101

  2.5D-digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface and also measures the distance of the input means within a short range in the Z direction, possibly with a separate measurement setup · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F2203/04106

  Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection · CPC title

• G06F3/041661

  using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window · CPC title