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US 8,804,058 B2Granted
Display device including compensation capacitors with different capacitance values
AssigneeInnolux Corporation
InventorsPo-Sheng Shih, Po-Yang Chen
Life of this patent
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Abstract
An exemplary display device providing touch function includes scanning lines and data lines thereby defining lots of sub-pixel units. Each sub-pixel unit includes a pixel electrode, a storage capacitor, a compensation capacitor connected between the pixel electrode and a corresponding scanning line. In each pixel unit defined by n number adjacent sub-pixel units, both of a ratio of capacitance values between the storage capacitors formed in the corresponding sub-pixel units and a ratio of capacitance values between the corresponding compensation capacitors are respectively substantially equal to a ratio of areas between the corresponding pixel electrodes.
Claims19
A display device, comprising:
- a plurality of parallel scanning lines;
- a plurality of parallel data lines intersecting with the scanning lines thereby defining a plurality of sub-pixel units;
- each sub-pixel unit comprising:
- a pixel electrode;
- a storage capacitor electrode, the storage capacitor electrode, the pixel electrode and an insulating layer sandwiched therebetween forming a storage capacitor;
- and
- a compensation capacitor connected between the pixel electrode and a corresponding scanning line;
- wherein among at least some of the sub-pixel units, adjacent sub-pixel units are grouped together to define a plurality of pixel units, each pixel unit comprises a predefined number N of sub-pixel units, and in each pixel unit, the pixel electrode of at least one of the sub-pixel units has an area different from the area of the pixel electrode of at least one other sub-pixel units, and both a ratio of capacitance values of the storage capacitors of the predefined number N of sub-pixel units, and a ratio of capacitance values of the compensation capacitors of the predefined number N of sub-pixel units, are configured to be substantially directly proportional to a ratio of the areas of the pixel electrodes of the predefined number N of sub-pixel units;
- whereby, when a scanning signal applied to the sub-pixels changes between a high level signal and a low level signal, feed-through voltages of the sub-pixels are capable of maintaining constants.
6 more elements
A display device, comprising:
- a plurality of liquid crystal molecules;
- a plurality of parallel scanning lines;
- a plurality of parallel data lines intersecting with the scanning lines thereby defining a plurality of sub-pixel units, each sub-pixel unit comprising:
- a pixel electrode;
- a common electrode, the common electrode, the pixel electrode and the liquid crystal molecules sandwiched there between forming a liquid crystal capacitor;
- a storage capacitor connected in parallel to the liquid crystal capacitor;
- and
- a compensation capacitor connected between the pixel electrode and a corresponding scanning line;
- wherein among at least some of the sub-pixel units, adjacent sub-pixel units are grouped together to define a plurality of pixel units, each pixel unit comprises a predefined number N of sub-pixel units, and in each pixel unit, the pixel electrode of at least one of the sub-pixel units has an area different from the area of the pixel electrode of at least one other sub-pixel units, and both a ratio of capacitance values of the storage capacitors of the predefined number N of sub-pixel units, and a ratio of capacitance values of the compensation capacitors of the predefined number N of sub-pixel units, are configured to be substantially directly proportional to a ratio of the capacitance values of the liquid crystal capacitors of the predefined number N of sub-pixel units;
- whereby, when a scanning signal applied to the sub-pixels changes between a high level signal and a low level signal, feed-through voltages of the sub-pixels are capable of maintaining constants.
7 more elements
A display device, comprising:
- a plurality of pixel units each defined by a predetermined number N of adjacent sub-pixel units, at least one of the pixel units comprising a detection element configured to generate a control signal when the at least one pixel unit is touched, and each sub-pixel unit comprising:
- a pixel electrode;
- a storage capacitor;
- and
- a compensation capacitor;
- wherein in the at least one pixel unit having the detection element, the detection element is provided in one of the sub-pixel units and the size of the pixel electrode of the sub-pixel unit is correspondingly reduced, and both a ratio of capacitance values of the storage capacitors of the predefined number N of sub-pixel units, and a ratio of capacitance values of the compensation capacitors of the predefined number N of sub-pixel units, are configured to be substantially directly proportional to a ratio of the areas of the pixel electrodes of the predefined number N of sub-pixel units;
- whereby, when a scanning signal applied to the sub-pixels changes between a high level signal and a low level signal, feed-through voltages of the sub-pixels are capable of maintaining constants.
4 more elements
Dependencies are inferred from the claim text.