Display unit with touch detection function, and electronic device

• US 10,162,470 B2
• Filed: 02/16/2017
• Issued: 12/25/2018
• Est. Priority Date: 08/19/2010
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Ishizaki, Koji, Noguchi, Koji, Nakanishi, Takayuki, Matsui, Yasuyuki, Ikeda, Masanobu
• Primary Examiner(s): Mishler, Robin
• Application Number:
  US15/435,011
• Publication Number:
  US 20170160853A1
• Time in Patent Office: 677 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• 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 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/02 characterised by the way in which colour is displayed details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607

Abstract

A display unit with a touch detection function includes: a plurality of touch detection electrodes arranged side by side to extend in a direction, each of the touch detection electrodes being formed in a predetermined electrode pattern including electrode portion and opening portion and outputting a detection signal, based on a variation in capacitance due to an external proximity object; and a plurality of display elements formed in a layer different from a layer of the touch detection electrodes, a predetermined number of the display elements being arranged within a width dimension of a region corresponding to each of the touch detection electrodes. The predetermined electrode pattern corresponds to a layout pattern of the display elements.

Claims

1. A display unit with a touch detection function, the display unit comprising:

(a) a plurality of touch detection electrodes that are disposed in a first layer and that output a detection signal based on a variation in capacitance due to an external proximity object, the touch detection electrodes including (1) a plurality of strip-shaped electrode parts arranged in parallel to each other, (2) a plurality of connection parts that connect the strip-shaped electrode parts to each other in a first direction perpendicular to a second direction in which each of the strip-shaped electrode parts extends, and (3) a plurality of openings arrayed in the first direction and defined and surrounded by the strip-shaped parts and the connection parts;

(b) a plurality of display elements disposed in a display region in a second layer different than the first layer in which the touch detection electrodes are disposed, the display elements being arranged at a predetermined pitch in the first direction, the display elements forming display pixels each of which includes a red sub-element, a green sub-element, and a blue sub-element also arrayed in the first direction; and

(c) a plurality of dummy electrodes disposed in the first layer in which the touch detection electrodes are disposed,

wherein,

in a plan view, the dummy electrodes are disposed in a region between touch detection electrodes,

the dummy electrodes include (1) a plurality of dummy electrode strip-shaped parts arranged in parallel to each other, (2) a plurality of dummy electrode connection parts that connect the dummy electrode strip-shaped parts to each other in the first direction, and (3) a plurality of dummy electrode openings arrayed in the first direction and defined and surrounded by the dummy electrode strip-shaped parts and the dummy electrode connection parts,

in the plan view, the strip-shaped electrode parts and dummy electrode strip-shaped parts are spaced at a same pitch in the first direction,

in the plan view, the strip-shaped electrode parts and the connection parts are provided in regions corresponding to borders between adjacent sub-elements,

in the plan view, the dummy electrode strip-shaped parts and the dummy electrode connection parts are provided in regions corresponding to borders between adjacent sub-elements,

in the plan view, each of the dummy electrode openings is disposed overlapping only a respective one of the green or blue sub-elements in the region between touch detection electrodes in such a manner that the openings expose therethrough the respective blue and green sub-elements in the region between touch detection electrodes, and

in the plan view, each of the openings is disposed overlapping only a respective one of the display sub-elements in such a manner that the openings expose all the respective display sub-elements of each of the display pixels, including the red sub-element, the green sub-element, and the blue sub-element.

2. The display unit according to claim 1, further comprising a plurality of signal lines that communicate a pixel signal to be transmitted to the display elements, wherein the strip-shaped electrode parts are arranged in a region corresponding to signal lines.

3. The display unit according to claim 2, further comprising a plurality of selection lines used to select the display element which is a target of display operation, wherein the connection parts are provided in a region corresponding to the selection lines.

4. The display unit according to claim 1, wherein each of the openings is substantially with a center of the its respective sub-element.

5. The display unit according to claim 1, wherein part of each of the dummy electrodes is provided in a region corresponding to the signal lines.

6. The display unit according to claim 1, further comprising a plurality of drive electrodes arranged side by side and extending in a direction intersecting the touch detection electrodes, wherein, capacitance is formed at each of intersections of the touch detection electrodes and the drive electrodes.

7. The display unit according to claim 6, further comprising a liquid crystal layer and a plurality of pixel electrodes disposed to face the drive electrodes across the liquid crystal layer, wherein the liquid crystal layer is interposed between the pixel electrodes and the drive electrodes.

8. The display unit according to claim 6, further comprising a liquid crystal layer and a plurality of pixel electrodes disposed between the liquid crystal layer and the drive electrodes.

12. The display unit according to claim 3, wherein:

each of the connection parts includes a first connection part and a second connection part, and

the first connection part and the second connection part included in one of the connection parts are spaced apart from each other in the second direction and provided in the region corresponding to a border between a pair of display elements adjacent to each other in the second direction.

13. The display unit according to claim 6, wherein, in the plan view, the drive electrodes are overlapped by the display elements of the red sub-element, the green sub-element, and the blue sub-element.

9. A display unit comprising:

a plurality of detection electrodes that are disposed in a first layer and that output a detection signal based on a variation in capacitance due to an external proximity object, the detection electrodes including (a) a plurality of strip-shaped electrode parts arranged in parallel to each other, (b) a plurality of connection parts that connect the strip-shaped electrode parts to each other in a first direction perpendicular to a second direction in which each of the strip-shaped electrode parts extends, and (c) a plurality of openings arrayed in the first direction and defined and surrounded by the strip-shaped parts and the connection parts;

a plurality of display elements disposed in a display region in a second layer different than the first layer in which the detection electrodes are disposed, the display elements being arranged at a predetermined pitch in the first direction, the display elements forming display pixels each of which includes a red sub-element, a green sub-element, and a blue sub-element also arrayed in the first direction;

a plurality of dummy electrodes disposed in the first layer in which the touch detection electrodes are disposed; and

a plurality of signal lines allowing the display elements to be driven,

wherein,

in a plan view, the dummy electrodes are disposed in a region between touch detection electrodes,

the dummy electrodes include (1) a plurality of dummy electrode strip-shaped parts arranged in parallel to each other, (2) a plurality of dummy electrode connection parts that connect the dummy electrode strip-shaped parts to each other in the first direction, and (3) a plurality of dummy electrode openings arrayed in the first direction and defined and surrounded by the dummy electrode strip-shaped parts and the dummy electrode connection parts,

in the plan view, the strip-shaped electrode parts and dummy electrode strip-shaped parts are spaced at a same pitch in the first direction,

in the plan view, the strip-shaped electrode parts and the connection parts are provided in regions corresponding to borders between adjacent sub-elements,

in the plan view, the dummy electrode strip-shaped parts and the dummy electrode connection parts are provided in regions corresponding to borders between adjacent sub-elements,

in the plan view, each of the dummy electrode openings is disposed overlapping only a respective one of the green or blue sub-elements in the region between touch detection electrodes in such a manner that the openings expose therethrough the respective blue and green sub-elements in the region between touch detection electrodes, and

in the plan view, each of the openings is disposed overlapping a respective one of the display sub-elements in such a manner that the openings expose all the respective display sub-elements of each of the display pixels, including the red sub-element, the green sub-element, and the blue sub-element.

10. The display unit according to claim 9, wherein part of each of the dummy electrodes is provided in a region corresponding to the signal lines.

11. An electronic device comprising:

a display unit with a touch detection function; and

a control section performing operation control with use of the display unit,

wherein,

the display unit includes

(a) a plurality of touch detection electrodes that are disposed in a first layer and that output a detection signal based on a variation in capacitance due to an external proximity object, the touch detection electrodes including (1) a plurality of strip-shaped electrode parts arranged in parallel to each other, (2) a plurality of connection parts that connect the strip-shaped electrode parts to each other in a first direction perpendicular to a second direction in which each of the strip-shaped electrode parts extends, and (3) a plurality of openings arrayed in the first direction and defined and surrounded by the strip-shaped parts and the connection parts;

(b) a plurality of display elements disposed in a display region in a second layer different from the first layer in which the touch detection electrodes are disposed, the display elements being arranged at a predetermined pitch in the first direction, the display elements forming display pixels each of which includes a red sub-element, a green sub-element, and a blue sub-element also arrayed in the first direction; and

(c) a plurality of dummy electrodes disposed in the first layer in which the touch detection electrodes are disposed,

wherein,

in a plan view, the dummy electrodes are disposed in a region between touch detection electrodes,

the dummy electrodes include (1) a plurality of dummy electrode strip-shaped parts arranged in parallel to each other, (2) a plurality of dummy electrode connection parts that connect the dummy electrode strip-shaped parts to each other in the first direction, and (3) a plurality of dummy electrode openings arrayed in the first direction and defined and surrounded by the dummy electrode strip-shaped parts and the dummy electrode connection parts,

in the plan view, the strip-shaped electrode parts and dummy electrode strip-shaped parts are spaced at a same pitch in the first direction,

in the plan view, the strip-shaped electrode parts and the connection parts are provided in regions corresponding to borders between adjacent sub-elements,

in the plan view, the dummy electrode strip-shaped parts and the dummy electrode connection parts are provided in regions corresponding to borders between adjacent sub-elements,

in the plan view, each of the dummy electrode openings is disposed overlapping only a respective one of the green or blue sub-elements in the region between touch detection electrodes in such a manner that the openings expose therethrough the respective blue and green sub-elements in the region between touch detection electrodes, and

in the plan view, each of the openings is disposed overlapping a respective one of the display sub-elements in such a manner that the openings expose all the respective display sub-elements of each of the display pixels, including the red sub-element, the green sub-element, and the blue sub-element, in a plan view.