LIQUID CRYSTAL DISPLAY DEVICE
First Claim
1. A liquid crystal display device, comprising:
- a first substrate;
a second substrate having detection electrodes of a touch panel;
a liquid crystal held between the first substrate and the second substrate;
a plurality of pixels arrayed in a matrix, each having a pixel electrode and a counter electrode divided into a plurality of blocks; and
a driver circuit that applies a counter voltage and a touch panel scanning voltage to the divided counter electrodes of the respective blocks,wherein the divided counter electrodes of the respective blocks are commonly provided on the respective pixels of a plurality of continuous display lines,wherein the divided counter electrodes of the respective blocks double as scanning electrodes of the touch panel,wherein, if N is an integer of 2 or larger, the driver circuit sequentially applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks in N horizontal scanning periods while a drive pulse for displaying an image is not varied, andwherein a drive frequency of the touch panel scanning voltage which is applied to the divided counter electrodes of the respective blocks in the respective periods of the N horizontal scanning periods is different in each of the N horizontal scanning periods.
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Accused Products
Abstract
In a liquid crystal display device, a second substrate has detection electrodes of a touch panel, each of pixels has a pixel electrode and a counter electrode divided into a plurality of blocks. The counter electrodes of the respective blocks are commonly provided for the respective pixels of plural continuous display lines, the counter electrodes of the respective blocks double scanning electrodes of the touch panel, and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the counter electrodes of the respective blocks is provided. The driver circuit sequentially applies the touch panel scanning voltage to the counter electrodes of the respective blocks in plural times, while a drive pulse for displaying an image on a liquid crystal display panel is not varied, and drive frequencies of the respective touch panel scanning voltages are different from each other.
40 Citations
13 Claims
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1. A liquid crystal display device, comprising:
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a first substrate; a second substrate having detection electrodes of a touch panel; a liquid crystal held between the first substrate and the second substrate; a plurality of pixels arrayed in a matrix, each having a pixel electrode and a counter electrode divided into a plurality of blocks; and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the divided counter electrodes of the respective blocks, wherein the divided counter electrodes of the respective blocks are commonly provided on the respective pixels of a plurality of continuous display lines, wherein the divided counter electrodes of the respective blocks double as scanning electrodes of the touch panel, wherein, if N is an integer of 2 or larger, the driver circuit sequentially applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks in N horizontal scanning periods while a drive pulse for displaying an image is not varied, and wherein a drive frequency of the touch panel scanning voltage which is applied to the divided counter electrodes of the respective blocks in the respective periods of the N horizontal scanning periods is different in each of the N horizontal scanning periods. - View Dependent Claims (2)
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3. A liquid crystal display device, comprising:
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a first substrate; a second substrate having detection electrodes of a touch panel; a liquid crystal held between the first substrate and the second substrate; a plurality of pixels arrayed in a matrix, each having a pixel electrode and a counter electrode divided into a plurality of blocks; and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the divided counter electrodes of the respective blocks, wherein the divided counter electrodes of the respective blocks are commonly provided on the respective pixels of a plurality of continuous display lines, wherein the divided counter electrodes of the respective blocks double as scanning electrodes of the touch panel, wherein, if N is an integer of 2 or larger, the driver circuit sequentially applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks in N horizontal scanning periods while a drive pulse for displaying an image is not varied, and wherein timing at which the touch panel scanning voltage is applied to the divided counter electrodes of the respective blocks in the respective periods of the N horizontal scanning periods is different in each of the N horizontal scanning periods. - View Dependent Claims (4)
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5. A liquid crystal display device, comprising:
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a first substrate; a second substrate having detection electrodes of a touch panel; a liquid crystal held between the first substrate and the second substrate; a plurality of pixels arrayed in a matrix, each having a pixel electrode and a counter electrode divided into a plurality of blocks; and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the divided counter electrodes of the respective blocks, wherein the divided counter electrodes of the respective blocks are commonly provided on the respective pixels of a plurality of continuous display lines, wherein the divided counter electrodes of the respective blocks double as scanning electrodes of the touch panel, wherein, if N is an integer of 2 or larger, the driver circuit sequentially applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks in N horizontal scanning periods while a drive pulse for displaying an image is not varied, and wherein a period since a reference time point till a time point when the touch panel scanning voltage is applied to the divided counter electrodes of the respective blocks in the respective periods of the N horizontal scanning periods is different in each of the N horizontal scanning periods. - View Dependent Claims (6, 7)
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8. A liquid crystal display device, comprising:
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a first substrate; a second substrate having detection electrodes of a touch panel; a liquid crystal held between the first substrate and the second substrate; a plurality of pixels arrayed in a matrix, each having a pixel electrode and a counter electrode divided into a plurality of blocks; and a driver circuit that applies a counter voltage and a touch panel scanning voltage to the divided counter electrodes of the respective blocks, wherein the divided counter electrodes of the respective blocks are commonly provided on the respective pixels of a plurality of continuous display lines, wherein the divided counter electrodes of the respective blocks double as scanning electrodes of the touch panel, wherein, if N is an integer of 2 or larger, the driver circuit sequentially applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks in N horizontal scanning periods while a drive pulse for displaying an image on a liquid crystal display panel is not varied, and wherein when it is assumed that t_txdly is a unit delay time, t_txwait is a given wait time, n is an integer of 1 or larger and N or smaller, and delay=(n−
1)×
t_txdl is satisfied, the driver circuit applies the touch panel scanning voltage to the divided counter electrodes of the respective blocks after a period (t_txwait+delay) has been elapsed from a reference time point when applying the touch panel scanning voltage to the divided counter electrodes of the respective blocks in an n-th horizontal scanning period. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification