Pixel inversion artifact reduction
AssigneeApple Inc.
InventorsKyung-Wook Kim, Young Bae Park, Shih Chang Chang, Chun-Yao Huang, John Z. Zhong
Life of this patent
Estimating the term…
Abstract
A system and device for driving high resolution monitors while reducing artifacts thereon. Utilization of Z-inversion polarity driving techniques to drive pixels in a display reduces power consumption of the display but tends to generate visible horizontal line artifacts caused by capacitances present between the pixels and data lines of the display. By introducing a physical shield between the pixel and data line elements, capacitance therebetween can be reduced, thus eliminating the cause of the horizontal line artifacts. The shield may be a common voltage line (Vcom) of the display.
Claims20
A display panel comprising:
- a unit pixel comprising:
- a pixel element;
- and
- a transistor having a drain coupled to the pixel element and a gate;
- a shielding conductor disposed below at least a portion of the pixel element, wherein the shielding conductor is configured to shield a parasitic capacitance of the pixel element;
- and
- a passive layer interposed below at least the portion of the pixel element and above the shielding conductor to allow for interaction between the pixel element and the shielding conductor, wherein the passive layer comprises a thickness between approximately 1000 Å and 3000 Å across an entirety of the passive layer, wherein the passive layer is configured to allow for reduced pixel driving voltage of the unit pixel based on the thickness of the passive layer.
A display comprising:
- a unit pixel comprising a pixel electrode;
- a coating layer;
- a shielding conductor disposed directly on the coating layer and below at least a portion of the pixel electrode, wherein the shielding conductor is configured to shield a parasitic capacitance of the pixel electrode;
- and
- a passive layer interposed below at least the portion of the pixel electrode and above the shielding conductor, wherein the passive layer comprises a thickness between approximately 1000 Å and 3000 Å across an entirety of the passive layer, wherein the passive layer is configured to allow for reduced pixel driving voltage of the unit pixel based on the thickness of the passive layer.
A display comprising:
- a pixel electrode;
- a transistor configured to be activated to transmit an image signal to the pixel electrode, wherein the transistor is directly coupled to the pixel electrode;
- a shielding conductor disposed below at least a portion of the pixel electrode of the display, wherein the shielding conductor is configured to shield a parasitic capacitance of the pixel electrode;
- and
- a passive layer interposed below at least the portion of the pixel electrode and above the shielding conductor, wherein the pixel electrode is disposed partially on the passive layer, wherein the passive layer comprises a thickness between approximately 1000 Å and 3000 Å across an entirety of the passive layer, wherein the passive layer is configured to allow for reduced pixel driving voltage of the unit pixel based on the thickness of the passive layer.
Dependencies are inferred from the claim text.