Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9645673-B2
Application number	US-201615200925-A
Country	US
Kind code	B2
Filing date	Jul 1, 2016
Priority date	Jun 8, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

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.

First claim

What is claimed is:

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 second substrate opposed to the first substrate;
a display area displaying an image, and including the plurality of pixel electrodes and the plurality of common electrodes; and
a semiconductor chip configured to supply a common voltage and a touch driving signal to the 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 opposed to the first long side,
the first long side extends along a second direction intersected with the first direction, and is located closer to the display area than the second long side,
a plurality of first terminals of the semiconductor chip electrically connects with the plurality of common electrodes respectively,
a plurality of second terminals of the semiconductor chip electrically connects with the plurality of video lines respectively, 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 liquid crystal 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, and
the first substrate includes a scanning line driving circuit configured to supply the scanning voltage to the plurality of scanning lines.

3. The liquid crystal 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 liquid crystal 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 liquid crystal 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 liquid crystal 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 configured to supply 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 electrodes 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, and is disposed nearer to the display area than the second long side,
a plurality of first terminals of the semiconductor chip electrically connect with the counter electrodes respectively,
a plurality of second terminals of the semiconductor chip electrically connect with the plurality of video lines respectively,
the plurality of second terminal is disposed above a portion where 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 liquid crystal 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 liquid crystal 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 liquid crystal display device according to claim 10 , wherein
the plurality of third terminals is disposed above a portion where 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 configured to supply 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 electrodes 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, and is disposed closer to the display area than the second long side,
a plurality of first terminals of the semiconductor chip electrically connect with the common electrodes respectively,
a plurality of second terminals of the semiconductor chip electrically connect with the plurality of video lines respectively,
the plurality of second terminal is disposed above a portion where is closer to the first long side than the second long side, and
the plurality of first terminals is disposed closer to an end of the first long side than the plurality of second terminals.

13. The liquid crystal 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 liquid crystal 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 liquid crystal display device according to claim 14 , wherein
the plurality of third terminals is disposed above a portion where is nearer to the second long side than the first long side.

16. The liquid crystal 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.

Assignees

• Japan Display Inc

Inventors

• Matsumoto Shuuichirou

Classifications

• G02F1/13452

  Conductors connecting driver circuitry and terminals of panels · CPC title

• G06F3/044

  by capacitive means · CPC title

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F2201/121

  common or background · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title