Liquid crystal display panel, driving method and liquid crystal display
First Claim
Patent Images
1. A liquid crystal display device comprising:
- a liquid crystal layer;
a plurality of common electrodes;
a pixel having at least a first sub-pixel region and a second sub-pixel region;
a first active device, in the first sub-pixel region, coupled to a first pixel electrode, a scan line, a data line, and a first storage capacitor opposite electrode;
one of the common electrodes, the first pixel electrode, and a portion of the liquid crystal layer form a first liquid crystal capacitor having a first capacitance;
a first storage capacitor line and the first storage capacitor opposite electrode forming a first storage capacitor having a second capacitance;
a second active device, in the second sub-pixel region, coupled to a second pixel electrode, the scan line, the data line, and a second storage capacitor opposite electrode;
the second pixel electrode, one of the common electrodes and a portion of the liquid crystal layer form a second liquid crystal capacitor having a third capacitance; and
a second storage capacitor line and the second storage capacitor opposite electrode forming a second storage capacitor having a fourth capacitance;
wherein a first ratio of the first capacitance to the second capacitance is unequal to a second ratio of the third capacitance to fourth capacitance and the device is configured to;
apply a scan signal to the scan line and a data signal to the data line;
apply a compensation signal to the first storage capacitor and the second storage capacitor;
switch the compensation signal to a high level based on the scan signal switching to a low level and to a low level based on the scan signal switching to a low level;
switch the scan signal to a low level and apply the data signal at a low gray level with a positive polarity;
the voltage of the data signal being less than a common voltage of a liquid crystal display panel; and
switch the scan signal to a low level and apply the data signal at a low gray level with a negative polarity, the voltage of the data signal being greater than the common voltage;
wherein the first active device has a first parasitic capacitance and the second active device has second parasitic capacitance, the first parasitic capacitance unequal to the second parasitic capacitance;
wherein the first and second sub-pixel regions respectively include equivalent feedthrough voltages and equivalent common voltages.
3 Assignments
0 Petitions
Accused Products
Abstract
In one embodiment of the invention, a pixel unit has two sub-pixel regions each including a liquid crystal capacitor (LCC) and storage capacitor (SC). The capacitance ratio of the SC to LCC of the first sub-pixel differs from the capacitance ratio of the SC to LCC of the second sub-pixel.
-
Citations
17 Claims
-
1. A liquid crystal display device comprising:
-
a liquid crystal layer; a plurality of common electrodes; a pixel having at least a first sub-pixel region and a second sub-pixel region; a first active device, in the first sub-pixel region, coupled to a first pixel electrode, a scan line, a data line, and a first storage capacitor opposite electrode; one of the common electrodes, the first pixel electrode, and a portion of the liquid crystal layer form a first liquid crystal capacitor having a first capacitance; a first storage capacitor line and the first storage capacitor opposite electrode forming a first storage capacitor having a second capacitance; a second active device, in the second sub-pixel region, coupled to a second pixel electrode, the scan line, the data line, and a second storage capacitor opposite electrode; the second pixel electrode, one of the common electrodes and a portion of the liquid crystal layer form a second liquid crystal capacitor having a third capacitance; and a second storage capacitor line and the second storage capacitor opposite electrode forming a second storage capacitor having a fourth capacitance; wherein a first ratio of the first capacitance to the second capacitance is unequal to a second ratio of the third capacitance to fourth capacitance and the device is configured to; apply a scan signal to the scan line and a data signal to the data line; apply a compensation signal to the first storage capacitor and the second storage capacitor; switch the compensation signal to a high level based on the scan signal switching to a low level and to a low level based on the scan signal switching to a low level; switch the scan signal to a low level and apply the data signal at a low gray level with a positive polarity;
the voltage of the data signal being less than a common voltage of a liquid crystal display panel; andswitch the scan signal to a low level and apply the data signal at a low gray level with a negative polarity, the voltage of the data signal being greater than the common voltage; wherein the first active device has a first parasitic capacitance and the second active device has second parasitic capacitance, the first parasitic capacitance unequal to the second parasitic capacitance; wherein the first and second sub-pixel regions respectively include equivalent feedthrough voltages and equivalent common voltages. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A liquid crystal display device, having a plurality of pixel units arranged in an array, wherein each pixel unit has a plurality of sub-pixel regions, and each pixel unit comprises:
-
a plurality of active devices, each of the plurality of active devices being formed in one of the sub-pixel regions and to electrically connect to a scan line and a data line; a plurality of liquid crystal capacitors, each of the plurality of liquid crystal capacitors formed in one of the sub-pixel regions and to electrically connect to one of the plurality of active devices; and a plurality of storage capacitors, each of the plurality of storage capacitors formed in one of the sub-pixel regions and to electrically connect to one of the plurality of active devices; wherein in a same pixel unit, a ratio of the capacitance of the storage capacitor to that of the liquid crystal capacitor of any sub-pixel region is unequal to a ratio of the capacitance of the storage capacitor to that of the liquid crystal capacitor of any other sub-pixel region; wherein the device is configured to; apply a compensation signal to a first of the storage capacitors and to a second of the storage capacitors; switch the compensation signal to a high level based on a scan signal switching to a low level and to a low level based on the scan signal switching to a low level; switch the scan signal to a low level and apply a data signal at a low gray level with a positive polarity;
the voltage of the data signal being less than a common voltage of a liquid crystal display panel; andswitch the scan signal to a low level and apply the data signal at a low gray level with a negative polarity, the voltage of the data signal being greater than the common voltage; wherein the active devices in the same pixel unit are to have different parasitic capacitances; wherein the sub-pixel regions respectively include equivalent feedthrough voltages and equivalent common voltages. - View Dependent Claims (13, 14, 15, 16, 17)
-
Specification