Array substrate, color filter substrate, touch control display device and methods for driving the same

• US 10,409,416 B2
• Filed: 08/01/2017
• Issued: 09/10/2019
• Est. Priority Date: 12/31/2013
• Status: Active Grant

• Current Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited), Tianma Microelectronics Company Limited
• Original Assignee: Shanghai Tianma Micro-Electronics Company Limited (Tianma Microelectronics Company Limited)
• Inventors: Liu, Baoling, Du, Lingxiao, Yao, Qijun, Ma, Jun
• Primary Examiner(s): Osorio, Ricardo
• Application Number:
  US15/665,440
• Publication Number:
  US 20170329452A1
• Time in Patent Office: 770 Days
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

The disclosure provides an array substrate and a color filter substrate of a capacitive touch control screen, a touch control display device and a method for driving the touch control display device, so as to achieve the self-capacitive multi-point touch. The array substrate of the capacitive touch control screen includes: a peripheral area and a display area; a plurality of pixel units with pixel electrodes arranged in the display area; a plurality of touch control electrodes; and touch control electrode lead wires connected with a module configured to detect a touch control signal, wherein each of the touch control electrodes is connected respectively with one of the touch control electrode lead wires.

Claims

1. A self-capacitive touch control screen, comprising an array substrate, and a color filter substrate arranged opposite to the array substrate;

wherein the color filter substrate comprises;

a substrate with a peripheral area, and a black matrix area comprising a black matrix structured as a grid;

an Indium Tin Oxide (ITO) layer on the substrate, wherein the ITO layer comprises a plurality of common electrodes arranged separately from one another in an M*N matrix in the black matrix area, wherein each of the plurality of common electrodes acts as a touch control electrode;

a plurality of touch control electrode lead wires connected with the plurality of common electrodes, wherein each of the plurality of common electrodes is connected with at least one of the plurality of touch control electrode lead wires, and respective common electrodes are connected with different touch control electrode lead wires respectively; and

a metal layer added on the ITO layer, wherein the metal layer is structured as a grid, and only positioned in a light shielding area of the black matrix of the color filter substrate;

wherein touch control electrode lead wires connected with common electrodes in odd rows are led out from a first side of the peripheral area to a module configured to detect a touch control signal, and touch control electrode lead wires connected with common electrodes in even rows are led out from a second side, opposite to the first side, of the peripheral area to the module configured to detect the touch control signal;

wherein areas of respective common electrodes in each odd row decrease gradually along a direction from the second side to the first side, and areas of respective common electrodes in each even row decrease gradually along a direction from the first side to the second side;

wherein M is an integer larger than or equal to 3, N is an integer larger than or equal to 3.

2. The self-capacitive touch control screen according to claim 1, wherein the plurality of common electrodes receive a touch control scanning signal concurrently, and the plurality of touch control electrode lead wires are connected with a module configured to detect signals of the plurality of common electrodes respectively.

3. The self-capacitive touch control screen according to claim 1, wherein each of the plurality of common electrodes is in a rectangular shape.

4. A self-capacitive touch control screen, comprising an array substrate, and a color filter substrate which is arranged opposite to the array substrate and comprises a black matrix structured as a grid;

wherein the array substrate comprises;

a substrate with a peripheral area and a display area;

a first Indium Tin Oxide (ITO) layer on the substrate, wherein the first ITO layer comprises a plurality of pixel electrodes, corresponding to a plurality of pixel units, in the display area;

a second ITO layer positioned above the first ITO layer, wherein the second ITO layer comprises a plurality of common electrodes arranged separately from one another in an M*N matrix in the display area, and a plurality of touch control electrode lead wires connected with the plurality of common electrodes;

wherein each of the plurality of common electrodes acts as a touch control electrode and corresponds to one or more of the plurality of pixel units, and a gap between adjacent common electrodes is located between adjacent pixel units;

each of the plurality of common electrodes comprises a plurality of slits in an area of a corresponding pixel unit to form a plurality of branch electrodes configured to generate a horizontal electric field between the plurality of branch electrodes and a corresponding pixel electrode; and

each of the plurality of common electrodes is connected with at least one of the plurality of touch control electrode lead wires, and respective common electrodes are connected with different touch control electrode lead wires respectively; and

a metal layer added on the second ITO layer, wherein the metal layer is structured as a grid, and only positioned in a light shielding area of the black matrix of the color filter substrate;

wherein touch control electrode lead wires connected with common electrodes in odd rows are led out from a first side of the peripheral area to a module configured to detect a touch control signal, and touch control electrode lead wires connected with common electrodes in even rows are led out from a second side, opposite to the first side, of the peripheral area to the module configured to detect the touch control signal;

wherein areas of respective common electrodes in each odd row decrease gradually along a direction from the second side to the first side, and areas of respective common electrodes in each even row decrease gradually along a direction from the first side to the second side;

wherein M is an integer larger than or equal to 3, N is an integer larger than or equal to 3.

5. The self-capacitive touch control screen according to claim 4, wherein the plurality of common electrodes receive a touch control scanning signal concurrently, and the plurality of touch control electrode lead wires are connected with a module configured to detect signals of the plurality of common electrodes respectively.

6. The self-capacitive touch control screen according to claim 4, wherein each of the plurality of common electrodes is in a rectangular shape.