Samsung patents display with stepped electrodes for mixed LED pixels
Samsung describes a display design where pixels use two different types of light-emitting diodes (LEDs) stacked in a specific arrangement. The patent details a top electrode that has a step difference, sitting higher over one type of LED and lower over another to manage the electrical connection.
In the filing’s own words
A display apparatus, including a circuit substrate including driver circuits and first bonding electrodes, and a pixel array on the circuit substrate and including a plurality of pixels each including first to third sub-pixels, and second bonding electrodes bonded to the first bonding electrodes, the pixel array further including, a plurality of first LED cells corresponding to the first and third sub-pixels, respectively, and each including a first conductivity-type semiconductor layer, a first active layer, and a second conductivity-type semiconductor layer, a plurality of second LED cells corresponding to the second sub-pixels, respectively, and each including the first conductivity-type semiconductor layer, a second active layer, and the second conductivity-type semiconductor layer, a first electrode extending to cover upper surfaces of the plurality of first and second LED cells and connected to the first conductivity-type semiconductor layers in common.
What exactly they claim (claim 1)
1. A display apparatus, comprising: a circuit substrate including driver circuits and first bonding electrodes; and a pixel array on the circuit substrate and including a plurality of pixels each including first to third sub-pixels, and second bonding electrodes bonded to the first bonding electrodes, the pixel array further including: a plurality of first LED cells corresponding to the first and third sub-pixels, respectively, and each including a first conductivity-type semiconductor layer, a first active layer, and a second conductivity-type semiconductor layer; a plurality of second LED cells corresponding to the second sub-pixels, respectively, and each including the first conductivity-type semiconductor layer, a second active layer, and the second conductivity-type semiconductor layer; a first electrode extending to cover upper surfaces of the plurality of first and second LED cells and connected to the first conductivity-type semiconductor layers in common; a plurality of second electrodes on lower surfaces of the plurality of first and second LED cells, respectively, and connected to the second conductivity-type semiconductor layers, respectively; and wavelength converters on the first LED cells in the third sub-pixels, wherein a lower surface of the first electrode is on a first level on the plurality of first LED cells and is on a second level lower than the first level on the plurality of second LED cells.
Facts
- Company
- Samsung (SAMSUNG ELECTRONICS CO., LTD.)
- Official title
- Display apparatus comprising an electrode having a step difference
- Patent number
- US12745498B2
- Application number
- 18218664
- Filed
- Jul 6, 2023
- Granted
- Sep 22, 2026
- Inventors
- 7
- Claims
- 20
Classified under
H10H 29/142 Electricity & electronicsH10H 20/8312 Electricity & electronicsH10H 20/8512 Electricity & electronicsMore 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.