Display device with touch detection function and electronic apparatus

• US 9,639,223 B2
• Filed: 05/14/2015
• Issued: 05/02/2017
• Est. Priority Date: 05/16/2014
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Kaneko, Hideki, Oue, Yoshihide
• Primary Examiner(s): Johnson, Gerald
• Application Number:
  US14/712,216
• Publication Number:
  US 20150331518A1
• Time in Patent Office: 719 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/134345 Subdivided pixels, e.g. for grey scale or redundancy
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G02F 2201/40 Arrangements for improving the aperture ratio
• CPC Class Codes: G06F 2203/04108 Touchless 2D- 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 without distance measurement in the Z direction
• 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: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2300/0465 Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3655 : Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: G09G 3/3677 : suitable for active matrices only
• CPC Class Codes: G09G 3/3688 : suitable for active matrices only

Abstract

According to an aspect, a display device with a touch detection function includes a display area; a pixel electrode; a plurality of scan lines; a plurality of data lines; an auxiliary wiring that is a wiring of a metal material having an electrical resistance lower than that of a material of the drive electrodes, is arranged so as to extend in the row direction for each row of the pixels, and is electrically coupled to the drive electrode; a control device that performs image display control and touch detection control; a touch detection electrode that faces the drive electrodes and forms a capacitance with the drive electrodes; and a touch detection unit that detects a position of a proximity object based on a detection signal sent from the touch detection electrode.

Claims

1. A display device with a touch detection function comprising:

a display area that has a plurality of pixels arranged in a matrix including a plurality of rows and a plurality of columns, in which one of the pixels includes a plurality of sub-pixels that represent mutually different colors and are arrayed in one column with k rows (k is a natural number of 3 or more), and in which arbitrary sub-pixels representing same color among arbitrary pixels that are adjacent to each other in a row direction are arrayed along the row direction;

a display function layer that has an image display function for displaying an image in the display area;

a pixel electrode that is provided in each of the sub-pixels and supplies an applied voltage to the display function layer by a potential difference with a common potential which is a reference;

a plurality of scan lines that extend in the row direction of the display area and scan switching elements of the sub-pixels;

a plurality of data lines that extend in a column direction of the display area and supply an applied voltage to the pixel electrodes;

a plurality of drive electrodes that are provided facing the pixel electrodes and extend in the row direction;

a slit that extends between the drive electrodes in the row direction of the display area, and the slit is provided in a boundary area of the pixels adjacent to each other in the column direction of the display area;

an auxiliary wiring that is a wiring of a metal material having an electrical resistance lower than that of a material of the drive electrodes, the auxiliary wiring being arranged along the slit so as to extend in the row direction for each row of the sub-pixels representing the same color and being electrically coupled to a drive electrode, and the auxiliary wiring overlaps with the drive electrode in a vertical direction of a pixel substrate;

a control device that performs image display control so as to apply the common potential to the drive electrodes based on an image signal to achieve the image display function of the display function layer, and that performs touch detection control so as to supply a drive signal for touch to the drive electrodes;

a touch detection electrode that faces the drive electrodes and forms a capacitance with the drive electrodes; and

a touch detection unit that detects a position of a proximity object based on a detection signal sent from the touch detection electrode.

2. The display device with a touch detection function according to claim 1, wherein a semiconductor of the switching element is formed of amorphous silicon.

3. The display device with a touch detection function according to claim 1, wherein at least one of the scan lines adjacent to the slit in the column direction overlaps with the drive electrode in the vertical direction of the pixel substrate.

4. The display device with a touch detection function according to claim 3, wherein a width of respective drive electrode in the column direction of the display area with respect to one of the pixels is wider than a maximum distance between the auxiliary wiring and a scan line with respect to the one of the pixels in the column direction of the display area, and wherein the scan line overlaps with the respective drive electrode.

5. The display device with a touch detection function according to claim 1, wherein the auxiliary wiring is electrically coupled to the drive electrode via a through hole arranged in each of the pixels which are arrayed in the row direction of the display area.

6. An electronic apparatus that includes the display device with a touch detection function according to claim 1.