Samsung patents display tech that fixes uneven brightness in OLED screens
Samsung describes a display device that uses inorganic light-emitting elements to create images. The system measures a specific voltage needed to remove visual 'stains' from the screen and stores this value to adjust how each pixel lights up. This helps compensate for small differences in the electronic components, ensuring the display shows consistent brightness.
In the filing’s own words
A display device is provided. The display device includes a display panel including a pixel array including pixels arranged in a plurality of row lines and including a plurality of inorganic light-emitting elements, and sub-pixel circuits corresponding to inorganic light-emitting elements 120 of the pixel array, and a driver configured to set an image data voltage corresponding to an image frame in units of the plurality of row lines in the sub-pixel circuits, set a reset voltage in units of the plurality of row lines in an anode terminal of the inorganic light-emitting elements, and drive the sub-pixel circuits so that the inorganic light-emitting elements emit light based on the set image data voltage and reset voltage.
What exactly they claim (claim 1)
1. A display device comprising: a display panel comprising: a pixel array comprising pixels arranged in a plurality of row lines, the pixels comprising a plurality of inorganic light-emitting elements; and sub-pixel circuits corresponding to the plurality of inorganic light-emitting elements of the pixel array; and a driver configured to: obtain a reset voltage by measuring a voltage value at which a stain is removed after displaying a monochromatic test image on the display panel; store the reset voltage in the display device; set an image data voltage corresponding to an image frame in sub-pixels of the plurality of row lines in the sub-pixel circuits; apply the stored reset voltage in the sub-pixels of the plurality of row lines in an anode terminal of the inorganic light-emitting elements; and drive the sub-pixel circuits so that an inorganic light-emitting element, of the inorganic light-emitting elements, emits light based on the set image data voltage and the stored reset voltage, wherein the stored reset voltage is a voltage for compensating for at least one of an electrical characteristic deviation of the inorganic light-emitting element or a ground voltage deviation applied to a cathode terminal of the inorganic light-emitting elements.
Facts
- Company
- Samsung (SAMSUNG ELECTRONICS CO., LTD.)
- Official title
- Display device and controlling method thereof
- Patent number
- US12731532B2
- Application number
- 18984530
- Filed
- Dec 17, 2024
- Granted
- Sep 8, 2026
- Inventors
- 2
- Claims
- 15
Classified under
G09G 3/32 Physics & computingG09G 2300/0852 Physics & computingG09G 2310/08 Physics & computingG09G 2320/0257 Physics & computingMore from Samsung in Chips & hardware
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Summaries are simplified from the filing’s own abstract and first claim. A patent filing is not a product announcement.
Patent data and drawings: U.S. Patent and Trademark Office (USPTO). Nebula is not affiliated with or endorsed by the USPTO.