Image sticking prevention method and system
AssigneeToshiba Global Commerce Solutions, Inc.
InventorsWei-Yi Hsuan, Yihsin Huang, Wen-Fu Tsai, Yin-Chen Chou
Life of this patent
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Abstract
Embodiments herein describe techniques for mitigating or preventing image sticking in a display screen (e.g., a LCD or plasma display). In one embodiment, the pixels in the display screen are assigned to different groups. During a first time period, the display turns off a subset of the pixels in each of the groups. De-energizing the pixel mitigates or removes the reversed voltage that creates image sticking. During another time period, another subset of pixels in each of the groups is de-energized while the pixels that were de-energized in the previous time period are energized.
Claims20
A method comprising:
- providing a display with pixels assigned to a plurality of groups;
- monitoring each of the plurality of groups individually for a duration a first image has been displayed on the display and a duration that a voltage associated with the first image has remained constant and the same for the pixels;
- determining a subset of the plurality of groups is experiencing image sticking;
- and
- responsive to determining the subset of the plurality of groups is experiencing image sticking, correcting the image sticking for each of the plurality of groups by repeatedly:
- selectively de-energizing a subset of pixels in each of the plurality of groups for a period of time based on the duration the first image has been displayed on the display and the duration that the voltage associated with the first image has remained constant and the same for the pixels;
- and
- selecting a different subset of pixels in each of the plurality of groups to de-energize after the period of time expires.
A non-transitory computer-readable storage medium having computer-readable program code embodied therewith, the computer-readable program code executable by a computer processor or a combination of computer processors to perform an operation, the operation comprises:
- providing a display with pixels assigned to a plurality of groups;
- monitoring each of the plurality of groups individually for a duration a first image has been displayed on the display and a duration that a voltage associated with the first image has remained constant and the same for the pixels;
- determining a subset of the plurality of groups is experiencing image sticking;
- and
- responsive to determining the subset of the plurality of groups is experiencing image sticking, correcting the image sticking for each of the plurality of groups by repeatedly:
- selectively de-energizing a subset of pixels in each of the plurality of groups for a period of time based on the duration the first image has been displayed on the display and the duration that the voltage associated with the first image has remained constant and the same for the pixels;
- and
- selecting a different subset of pixels in each of the plurality of groups to de-energize after the period of time expires.
A system, comprising:
- a display with pixels assigned to a plurality of groups;
- and
- a pixel selector configured to:
- monitor each of the plurality of groups individually for a duration a first image has been displayed on the display and a duration that a voltage associated with the first image has remained constant and the same for the pixels;
- determine a subset of the plurality of groups is experiencing image sticking;
- and
- responsive to determining the subset of the plurality of groups is experiencing image sticking, correcting the image sticking for each of the plurality of groups by repeatedly:
- selectively de-energizing a subset of pixels in each of the plurality of groups for a period of time based on the duration the first image has been displayed on the display and the duration that the voltage associated with the first image has remained constant and the same for the pixels;
- and
- select a different subset of pixels in each of the plurality of groups to de-energize after the period of time expires.
Dependencies are inferred from the claim text.