DISPLAY DEVICE
First Claim
1. A display device comprising:
- a display panel;
an electrostatic capacitive type touch panel which is formed in an overlapping manner with the display panel;
a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes which are formed on the electrostatic capacitive type touch panel, each X electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and electrode portions each of which is formed between two intersecting portions, and each Y electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and electrode portions each of which is formed between two intersecting portions;
a first signal line which supplies signals to the X electrodes from both ends of said each X electrode;
a second signal line which supplies signals to the Y electrodes from both ends of said each Y electrode; and
a flexible printed circuit board on which the first signal line and the second signal line are formed, whereinthe first signal line and the second signal line intersect with each other on the flexible printed circuit board, and the first signal line and the second signal line are respectively branched into a plurality of paths on the flexible printed circuit board.
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Accused Products
Abstract
A display device having a highly reliable electrostatic capacitive type touch panel which allows finger touch inputting and possesses excellent detection sensitivity is provided. With respect to X electrodes and Y electrodes which are formed on an electrostatic capacitive type touch panel, either one of the X electrodes and the Y electrodes is divided corresponding to a ratio between the number of X electrodes and the number of Y electrodes, and a floating electrode is formed in gaps formed along with the reduction of area of the electrode thus adjusting the area of the electrode. Due to the contraction of the area of the individual electrode, a noise level can be lowered more compared to lowering of a signal level and hence, an S/N ratio can be increased thus enhancing the detection sensitivity. Further, a line is branched on a flexible printed circuit board, intersecting lines are formed on a back surface of the flexible printed circuit board, and the intersecting lines are arranged to orthogonally intersect with lines formed on a front surface of the flexible printed circuit board thus lowering line capacitance.
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Citations
15 Claims
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1. A display device comprising:
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a display panel; an electrostatic capacitive type touch panel which is formed in an overlapping manner with the display panel; a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes which are formed on the electrostatic capacitive type touch panel, each X electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and electrode portions each of which is formed between two intersecting portions, and each Y electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and electrode portions each of which is formed between two intersecting portions; a first signal line which supplies signals to the X electrodes from both ends of said each X electrode; a second signal line which supplies signals to the Y electrodes from both ends of said each Y electrode; and a flexible printed circuit board on which the first signal line and the second signal line are formed, wherein the first signal line and the second signal line intersect with each other on the flexible printed circuit board, and the first signal line and the second signal line are respectively branched into a plurality of paths on the flexible printed circuit board. - View Dependent Claims (2, 3, 4, 5)
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6. A display device comprising:
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a display panel having long sides and short sides; an electrostatic capacitive type touch panel which is adhered to the display panel; a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes which are formed on the electrostatic capacitive type touch panel, each X electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and individual electrodes each of which is formed between two intersecting portions and has a width wider than a width of the intersecting portion, and each Y electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and individual electrodes each of which is formed between two intersecting portions and has a width wider than a width of the intersecting portion; a first line and a third line which supply signals to the X electrodes; a second line and a fourth line which supply signals to the Y electrodes; and a flexible printed circuit board on which the first, second, third and fourth lines are formed, wherein the X electrodes are formed along the long sides of the touch panel, one-end portions of the first and third lines are respectively connected with the X electrodes on both short-side end portions of the touch panel, and another end portions of the first and third lines are connected with each other on the flexible printed circuit board; and the Y electrodes are formed along the short sides of the touch panel, one-end portions of the second and fourth lines are respectively connected with the Y electrodes on both long-side end portions of the touch panel, and another end portions of the second and fourth lines are connected with each other on the flexible printed circuit board. - View Dependent Claims (7, 8, 9, 10)
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11. A display device comprising:
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a display panel; an electrostatic capacitive type touch panel which is mounted on the display panel; a plurality of X electrodes and a plurality of Y electrodes intersecting with the X electrodes which are formed on the electrostatic capacitive type touch panel, each X electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and individual electrodes each of which is formed between two intersecting portions and has a width wider than a width of the intersecting portion, and each Y electrode having intersecting portions where the X electrode and the Y electrode overlap with each other and individual electrodes each of which is formed between two intersecting portions and has a width wider than a width of the intersecting portion; a first line which supplies signals to the X electrodes; a second line which supplies signals to the Y electrodes; and a flexible printed circuit board on which the first and second lines are formed, wherein the flexible printed circuit board includes external-device-side input/output terminals and electrostatic capacitive type touch panel side input/output terminals; the number of electrostatic capacitive type touch panel side input/output terminals is larger than the number of external device side input/output terminals, a transparent conductive film is provided between the display panel and the electrostatic capacitive type touch panel, and the transparent conductive film is connected to a constant voltage power source. - View Dependent Claims (12, 13, 14, 15)
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Specification