DISPLAY DEVICE WITH TOUCH DETECTION FUNCTION AND ELECTRONIC APPARATUS

• US 20140293158A1
• Filed: 03/14/2014
• Published: 10/02/2014
• Est. Priority Date: 03/27/2013
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: KURASAWA, Hayato, ISHIZAKI, Koji, KOITO, Takeo
• Granted Patent: US 9,298,328 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 2203/04808 Several contacts: gestures triggering a specific function, e.g. scrolling, zooming, right-click, when the user establishes several contacts with the surface simultaneously; e.g. using several fingers or a combination of fingers and pen
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• 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 2320/02 Improving the quality of display appearance
• CPC Class Codes: G09G 3/36 using liquid crystals
• 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 3/3655 Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
• CPC Class Codes: G09G 3/3674 Details of drivers for scan electrodes
• CPC Class Codes: G09G 3/3685 Details of drivers for data electrodes

Abstract

According to an aspect, a display device with a touch detection function includes a display area and a touch detection electrode that includes thin wire segments having first and second ends. Thin wire segments include a thin wire segment extending in a direction different from a pixel arrangement direction in which color regions having the highest human visibility are arranged. The second end is located away from the first end in a direction toward a target position that is distant from the first end in a pixel orthogonal direction by N times of a maximum length of one of the pixels in the pixel orthogonal direction, and in the pixel arrangement direction by M times of a maximum length of one of the pixels in the pixel arrangement direction. Each of N and M is an integer of 2 or larger. N and M are different from each other.

Claims

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

a substrate;

a display area in which pixels each constituted by a plurality of color regions are arranged in a matrix in a plane parallel to a surface of the substrate;

a touch detection electrode that includes a conductive thin wire extending in a plane parallel to the surface of the substrate, the conductive thin wire including a plurality of thin wire segments each having a linear shape and including a first end and a second end, the second end of one of adjacent thin wire segments and the first end of the other of the adjacent thin wire segments being connected to each other;

a drive electrode that has electrostatic capacitance with respect to the touch detection electrode; and

a display function layer having a function of displaying an image in the display area, wherein

when it is assumed that a direction of arrangement of color regions having the highest human visibility among the color regions is defined as a pixel arrangement direction, that a maximum length of one of the pixels in a pixel orthogonal direction orthogonal to the pixel arrangement direction in the plane parallel to the surface of the substrate is defined as a first unit length, and that a maximum length of one of the pixels in a direction parallel to the pixel arrangement direction is defined as a second unit length,

the plurality of thin wire segments included in the conductive thin wire include a thin wire segment extending in a direction different from the pixel arrangement direction, and the second end of the thin wire segment is located at a place away from the first end in a direction toward a target position, where the target position is distant from the first end of the thin wire segment in the pixel orthogonal direction by N times of the first unit length, and is distant from the first end of the thin wire segment in the pixel arrangement direction by M times of the second unit length, each of N and M is an integer of 2 or larger, and N and M are different from each other.

2. The display device with the touch detection function according to claim 1, wherein each of N and M is an integer of 3 or larger.

3. The display device with the touch detection function according to claim 2, wherein a difference between N and M is 1.

4. The display device with the touch detection function according to claim 1, wherein in the adjacent thin wire segments, a portion at which the second end of one of the adjacent thin wire segments is connected to the first end of the other of the thin wire segments forms a bent portion, from which the one of the adjacent thin wire segments extends at an angle with respect to the pixel arrangement direction, and the other of the adjacent thin wire segments extends in a direction different from that of the one of the adjacent thin wire segments so as to change the angle with respect to the pixel arrangement direction at the bent portion.

5. The display device with the touch detection function according to claim 1, wherein

a plurality of such conductive thin wires are arranged in the plane parallel to the surface of the substrate and are arranged so as to form an intersecting portion where the thin wire segments of the conductive thin wires adjacent to each other intersect, and

one of the adjacent conductive thin wires is connected to the thin wire segments of the other of the adjacent conductive thin wires at the intersecting portion.

6. The display device with the touch detection function according to claim 1, wherein

the touch detection electrode and the drive electrode are arranged in different planes with the substrate interposed therebetween in a direction orthogonal to the surface of the substrate;

and

the drive electrode is translucent.

7. The display device with the touch detection function according to claim 6, wherein the drive electrode extends in the pixel arrangement direction or the pixel orthogonal direction.

8. An electronic apparatus comprising:

a display device with a touch detection function that comprises;

a substrate;

a display area in which pixels each constituted by a plurality of color regions are arranged in a matrix in a plane parallel to a surface of the substrate;

a touch detection electrode that includes a conductive thin wire extending in a plane parallel to the surface of the substrate, the conductive thin wire including a plurality of thin wire segments each having a linear shape and including a first end and a second end, the second end of one of adjacent thin wire segments and the first end of the other of the adjacent thin wire segments being connected to each other;

a drive electrode that has electrostatic capacitance with respect to the touch detection electrode; and

a display function layer having a function of displaying an image in the display area, wherein

when it is assumed that a direction of arrangement of color regions having the highest human visibility among the color regions is defined as a pixel arrangement direction, that a maximum length of one of the pixels in a pixel orthogonal direction orthogonal to the pixel arrangement direction in the plane parallel to the surface of the substrate is defined as a first unit length, and that a maximum length of one of the pixels in a direction parallel to the pixel arrangement direction is defined as a second unit length,

the plurality of thin wire segments included in the conductive thin wire include a thin wire segment extending in a direction different from the pixel arrangement direction, and the second end of the thin wire segment is located at a place away from the first end in a direction toward a target position, where the target position is distant from the first end of the thin wire segment in the pixel orthogonal direction by N times of the first unit length, and is distant from the first end of the thin wire segment in the pixel arrangement direction by M times of the second unit length, each of N and M is an integer of 2 or larger, and N and M are different from each other.