Display unit with touch detection function, and electronic device

• US 9,122,359 B2
• Filed: 08/12/2011
• Issued: 09/01/2015
• 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 J
• Application Number:
  US13/208,952
• Publication Number:
  US 20120044202A1
• Time in Patent Office: 1,481 Days
• Field of Search: 345173-174, 345/87
• US Class Current: 1/1
• 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 plurality of touch detection electrodes that output a detection signal based on a variation in capacitance due to an external proximity object, the plurality of touch detection electrodes including a plurality of strip-shaped electrode parts arranged in parallel to each other and a plurality of connection parts that connect the plurality of strip-shaped electrode parts to each other in a first direction perpendicular to a second extending direction of the strip-shaped electrode parts; and

a plurality of display elements formed in a layer different from a layer of the touch detection electrodes, the plurality of the display elements being contiguously arranged at a predetermined pitch in the first direction of a display region of the display, the display region of the display being comprised of all of the display regions of the display elements,

wherein,

the plurality of strip-shaped electrode parts are spaced at the same pitch in the first direction of the display region, and

the plurality of strip-shape electrode parts have widths in the first direction such that each of the display regions of the plurality of display elements is substantially not overlain by the plurality of strip-shaped electrode parts.

2. The display unit according to claim 1, further comprising a signal line that communicates a pixel signal to be transmitted to the display element, wherein a part of the electrode portion is arranged in a region corresponding to the signal line.

3. The display unit according to claim 2, further comprising a selection line used to select the display element which is a target of display operation, wherein a remaining part of the electrode portion is provided in a region corresponding to the selection line.

4. The display unit according to claim 1, wherein the electrode portion is provided in a region corresponding to a border between the display elements adjacent to each other.

5. The display unit according to claim 1, wherein:

the display elements form display pixels each of which includes a red sub-element, a green sub-element, and a blue sub-element, and

the electrode portion is provided at least in a region corresponding to a color sub-element for red light, green light or blue light, the color sub-element exhibiting a highest transmittance for the electrode portion.

6. The display unit according to claim 5, wherein the electrode portion is provided at least in a region corresponding to the red sub-element.

7. The display unit according to claim 6, wherein the electrode portion is further provided in a region corresponding to the green sub-element as well.

8. The display unit according to claim 7, wherein the electrode portion and the opening portion are provided in a region corresponding to the blue sub-element.

9. The display unit according to claim 8, wherein the opening portion is provided substantially at a center of the blue sub-element, the center representing a position in a direction along which the red sub-element, the green sub-element, and the blue sub-element are arrayed.

10. The display unit according to claim 1, further comprising a plurality of dummy electrodes disposed in a region between the plurality of touch detection electrodes, each of the dummy electrodes being formed in a predetermined dummy electrode pattern including electrode portion and opening portion, wherein, the dummy electrode pattern corresponds to a layout pattern of the display elements.

11. 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.

12. The display unit according to claim 11, wherein the display element includes a liquid crystal layer and a pixel electrode disposed to face the drive electrode across the liquid crystal layer, the liquid crystal layer being interposed between the pixel electrode and the drive electrode.

13. The display unit according to claim 11, wherein the display element includes a liquid crystal layer and a pixel electrode formed between the liquid crystal layer and the drive electrode.

17. The display unit according to claim 1, wherein the plurality of strip-shaped electrode parts are disposed at the positions corresponding to a pixel line and the plurality of connection parts are disposed at the positions corresponding to a scanning line.

14. A display unit comprising:

a plurality of detection electrodes that output a detection signal based on a variation in capacitance due to an external proximity object, the plurality of detection electrodes including a plurality of strip-shaped electrode parts arranged in parallel to each other and a plurality of connection parts that connect the plurality of strip-shaped electrode parts to each other in a first direction perpendicular to a second extending direction of the strip-shaped electrode parts;

a plurality of display elements formed in a layer different from a layer of the detection electrodes, the plurality of the display elements being contiguously arranged at a predetermined pitch in the first direction of a display region of the display unit, the display region of the display being comprised of all of the display regions of the display elements; and

a signal line allowing the display elements to be driven,

wherein,

part of the electrode portion is arranged in a region corresponding to the signal line, the plurality of strip-shaped electrode parts being spaced at the same pitch in the first direction of the display region, and

the plurality of strip-shaped electrode parts have widths in the first direction such that each of the display regions of the plurality of display elements is substantially not overlain by the plurality of strip-shaped electrode parts.

15. The display unit according to claim 14, further comprising dummy electrodes formed in the same layer as the layer where the detection electrodes are formed, wherein part of each of the dummy electrodes is provided in a region corresponding to the signal line.

16. 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 plurality of touch detection electrodes that output a detection signal based on a variation in capacitance due to an external proximity object, the plurality of touch detection electrodes including a plurality of strip-shaped electrode parts arranged in parallel to each other and a plurality of connection parts that connect the plurality of strip-shaped electrode parts to each other in a first direction perpendicular to a second extending direction of the strip-shaped electrode parts; and

a plurality of display elements formed in a layer different from a layer of the touch detection electrodes, the plurality of the display elements being contiguously arranged at a predetermined pitch in the first direction of a display region of the display unit the display region of the display being comprised of all of the display regions of the display elements, and

wherein,

the plurality of strip-shaped electrode parts are spaced at the same pitch in the first direction of the display region, and

the plurality of strip-shape electrode parts have widths in the first direction such that each of the display regions of the plurality of display elements is substantially not overlain by the plurality of strip-shaped electrode parts.