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US 11,232,743 B2Granted
OLED device with controllable brightness
AssigneeUniversal Display Corporation
InventorsMichael Hack, Chun Lin
Life of this patent
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Abstract
Devices and techniques are provided in which an OLED panel is operated in two modes. The first mode operates in a standard way to display an image or video or otherwise illuminate sub-pixels of the panel. In the second mode, some pixels are operated at a lower brightness than in the first mode. The use of multiple modes allows for improved sub-pixel lifetime and reduced sub-pixel and image degradation.
Claims16
A device comprising:
- an organic light emitting diode (OLED) device comprising a plurality of pixels, at least one pixel of the plurality of pixels comprising a first sub-pixel of a first color and a second sub-pixel of a second color different than the first color;
- and
- a display controller operable to selectively operate the OLED device in a first mode and a second mode;
- wherein, in the first mode, for a given display image,
- the display controller operates the first sub-pixel at a first brightness L1, and
- the display controller operates the second sub-pixel at a second brightness M1, and in the second mode, for the given display image,
- the display controller operates the first sub-pixel at a third brightness L2 that is lower than the first brightness L1 and
- the display controller operates the second sub-pixel at a fourth brightness M2 that is lower than the first brightness M1
- wherein the ratio ΔL=L2/L1 is less than the ratio M2/M1 and is based upon an overall brightness of the device.
6 more elements
Dependencies are inferred from the claim text.