DISPLAY UNIT WITH TOUCH DETECTION FUNCTION, AND ELECTRONIC DEVICE

• US 20120044202A1
• Filed: 08/12/2011
• Published: 02/23/2012
• Est. Priority Date: 08/19/2010
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ishizaki, Koji, Noguchi, Koji, Nakanishi, Takayuki, Matsui, Yasuyuki, Ikeda, Masanobu
• Granted Patent: US 9,122,359 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• 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 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,

wherein the predetermined electrode pattern corresponds to a layout pattern of the display elements.

2. The display unit according to claim 1, further comprising a signal line allowing 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 including three kinds of color sub-elements configured of 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 a selected one of red light, green light and blue light, the selected one exhibiting 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 display element.

9. The display unit according to claim 8, wherein the opening portion is provided substantially at a center of the blue display 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 to extend in a direction intersecting the touch detection electrodes,

wherein the 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, thereby allowing the liquid crystal layer to be 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.

14. A display unit comprising:

a plurality of detection electrodes formed in a predetermined electrode pattern including electrode portion and opening portion;

a plurality of display elements formed in a layer different from a layer of the detection electrodes; and

a signal line allowing the display element to be driven,

wherein part of the electrode portion is arranged in a region corresponding to the signal line.

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 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, and

wherein the predetermined electrode pattern corresponds to a layout pattern of the display elements.