Liquid crystal display device

• US 9,864,462 B2
• Filed: 04/05/2017
• Issued: 01/09/2018
• Est. Priority Date: 06/08/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Matsumoto, Shuuichirou
• Primary Examiner(s): ROSARIO, NELSON M
• Application Number:
  US15/479,364
• Publication Number:
  US 20170205951A1
• Time in Patent Office: 279 Days
• Field of Search: 345 38, 345 50, 345 87-104, 345156, 345173-179, 178 1801- 1809, 178 1811, 178 1901- 1907
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134336 Matrix
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• 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 3/044 by capacitive means
• 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

Abstract

In a liquid crystal display device, a second substrate includes a detection electrode of a touch panel, pixels include pixel electrodes and counter electrodes, the counter electrodes are divided into a plurality of blocks, the counter electrodes of the divided blocks are provided in common to the pixels on a plurality of display lines being side by side, the counter electrodes of the divided blocks are used as scanning electrodes of the touch panel as well, the liquid crystal display device includes a semiconductor chip configured to supply a counter voltage and a touch panel scanning voltage to the counter electrodes of the divided blocks, the semiconductor chip includes a first terminal group formed on a side of a display area side configured by the plurality of pixels.

Claims

1. A display device comprising:

a first substrate including a plurality of pixel electrodes, a plurality of common electrodes, and a plurality of video lines extending along a first direction;

a display area displaying an image, and including the plurality of pixel electrodes and the plurality of common electrodes; and

a semiconductor chip that supplies a common voltage and a touch driving signal to the plurality of common electrodes, and a video signal to the plurality of video lines,

wherein

the plurality of common electrodes are used as a counter electrode of the plurality of pixel electrodes and as a touch driving electrode of a touch panel,

the semiconductor chip includes a first long side and a second long side, the first long side and the second long side extend along a second direction,

a plurality of first terminals of the semiconductor chip outputs the touch driving signal,

a plurality of second terminals of the semiconductor chip outputs the video signal, and

the plurality of first terminals is located closer to an end of the first long side than the plurality of second terminals.

2. The display device according to claim 1, wherein

the display area includes a plurality of pixel transistors, and a plurality of scanning lines for supplying a scanning voltage to the pixel transistors,

the first substrate includes a scanning line driving circuit configured to supply the scanning voltage to the plurality of scanning lines.

3. The display device according to claim 2, wherein

a plurality of scanning line driving circuit wirings are formed on the first substrate and electrically connected with the scanning line driving circuit.

4. The display device according to claim 3, wherein

a plurality of third terminals of the semiconductor chip electrically connects with the plurality of scanning line driving circuit wirings respectively.

5. The display device according to claim 4, wherein

the plurality of third terminals is disposed above a portion where is closer to the second long side than the first long side.

6. The display device according to claim 1, further comprising a main flexible printed circuit board,

wherein

the main flexible printed circuit board electrically connects with the semiconductor chip.

7. The liquid crystal display device according to claim 6, wherein

the plurality of first terminals is formed both ends of the first long side.

8. A display device comprising:

a display panel including a display area;

a plurality of pixels including a pixel electrode and a counter electrode, and arranged in a matrix shape for forming the display area;

a plurality of video lines extending along a first direction; and

a semiconductor chip that supplies a common voltage and a touch panel voltage to the counter electrodes, and a video signal to the plurality of video lines,

wherein

the counter electrode is opposed to the pixel electrode of the pixels, and used as a touch electrode of a touch panel,

the semiconductor chip includes a first long side and a second long side opposed to the first long side,

the first long side extends along a second direction intersected with the first direction,

a plurality of first terminals of the semiconductor chip outputs the common voltage and the touch panel voltage,

a plurality of second terminals of the semiconductor chip outputs the video signal,

the plurality of second terminal is disposed above a portion that is nearer to the first long side than the second long side, and

the plurality of first terminals is disposed nearer to an end of the first long side than the plurality of second terminals.

9. The display device according to claim 8,

further comprising a plurality of scanning lines for inputting a scanning voltage to the pixels and formed above the first substrate,

a scanning line driving circuit configured to supply the scanning voltage to the plurality of scanning lines, and

a plurality of scanning line driving circuit wirings electrically connecting with the scanning line driving circuit.

10. The display device according to claim 9, wherein

a plurality of third terminals of the semiconductor chip electrically connects with the plurality of scanning line driving circuit wirings respectively.

11. The display device according to claim 10, wherein

the plurality of third terminals is disposed above a portion that is nearer to the second long side than the first long side.

12. A display device comprising:

a display panel including a display area;

a plurality of pixels including a pixel electrode and a common electrode, and arranged in a matrix shape for forming the display area;

a plurality of video lines extending along a first direction; and

a semiconductor chip that supplies a common voltage and a touch panel voltage to the common electrode, and a video signal to the plurality of video lines,

wherein

the common electrode is opposed to the pixel electrode of the pixels, and used as a touch electrode of a touch panel,

the semiconductor chip includes a first long side and a second long side opposed to the first long side,

the first long side extends along a second direction intersected with the first direction,

a plurality of first terminals of the semiconductor chip outputs the common voltage and the touch panel voltage to the common electrodes,

a plurality of second terminals of the semiconductor chip outputs the video signal to the plurality of video lines,

a plurality of third terminals of the semiconductor chip input an input signal,

the plurality of second terminal is disposed above a portion where is closer to the first long side than the second long side,

the plurality of first terminals is disposed closer to an end of the first long side than the plurality of second terminals, and

the plurality of third terminals is disposed above a portion that is nearer to the second long side than the first long side.

13. The display device according to claim 12,

further comprising a plurality of scanning lines for inputting a scanning voltage to the pixels and formed above the first substrate,

a scanning line driving circuit configured to supply the scanning voltage to the plurality of scanning lines, and

a plurality of scanning line driving circuit wirings electrically connecting with the scanning line driving circuit.

14. The display device according to claim 13, wherein

a plurality of third terminals of the semiconductor chip electrically connects with the plurality of scanning line driving circuit wirings respectively.

15. The display device according to claim 14, wherein

the plurality of third terminals includes a power source input terminal.

16. The display device according to claim 12, further comprising a main flexible printed circuit board, wherein

the main flexible printed circuit board electrically connects with the semiconductor chip.