# US 12,512,041 B1 · Apparatuses, systems, and methods for MicroLED (mLED) backplane architectures

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- Number: US 12,512,041 B1
- Document ID: US12512041B1
- Status: Granted
- Kind: B1
- Application number: 18/626,097
- Filed: 2024-04-03
- Granted: 2025-12-30
- Earliest claimed: 2021-03-26
- Assignees: Forth Dimension Display, Ltd
- Applicants: Forth Dimension Displays Ltd.
- Inventors: Christopher Robert Chalmers; Mladen Panovic; Debra Jane Lefley; Gordon John Faulds; Jason Darren Drew; Jedrzej Nowakowski; Mark Newsam; Neil Mallory; Robert Charles Beat; Robert Arthur Creber; Ruiyan Zhao
- Web page: https://patentgrep.com/patent/US12512041B1

## CPC

- G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED]
- G09G 3/2074: {using sub-pixels}
- G09G 3/2085: {Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination}
- G09G 3/2018: {by time modulation using two or more time intervals}
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2300/0857: Static memory circuit, e.g. flip-flop
- G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
- G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage
- G09G 2310/0259: with use of an analog or digital ramp generator in the column driver or in the pixel circuit
- G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters
- G09G 2310/0291: Details of output amplifiers or buffers arranged for use in a driving circuit
- G09G 2310/08: Details of timing specific for flat panels, other than clock recovery
- G09G 2320/0233: Improving the luminance or brightness uniformity across the screen
- G09G 2320/0276: for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)

## Abstract

Method, apparatuses, and systems are described to display image data to a sub-pixel within a micro-LED (mLED) display. A sub-pixel image data value is stored at the sub-pixel. The sub-pixel is turned to an ON state. A shared row counter value is provided to the sub-pixel. The shared row counter value and the sub-pixel image data value are compared at the sub-pixel. The sub-pixel is turned to an OFF state if the shared row counter value is equal to or greater than the sub-pixel image data value.

## Claims

### Claim 1

A method to display image data to a sub-pixel within a micro-LED (mLED) display, comprising:
storing a sub-pixel image data value at the sub-pixel;
turning the sub-pixel to an ON state;
providing a shared row counter value to the sub-pixel;
comparing the shared row counter value and the sub-pixel image data value; and
turning the sub-pixel to an OFF state if the shared row counter value is equal to or greater than the sub-pixel image data value wherein the sub-pixel image data value is encoded and the shared row counter value is encoded, gamma correction is encoded into sub-pixel image data and the gamma correction is related to a count frequency associated with sub-pixel image data.

### Claim 2

A computer-readable storage medium storing program code for causing a data processing system to perform the steps comprising:
storing a sub-pixel image data value at a sub-pixel;
turning the sub-pixel to an ON state;
providing a shared row counter value to the sub-pixel;
comparing the shared row counter value and the sub-pixel image data value; and
turning the sub-pixel to an OFF state if the shared row counter value is equal to or greater than the sub-pixel image data value, wherein the sub-pixel image data value is encoded and the shared row counter value is encoded, gamma correction is encoded into sub-pixel image data and the gamma correction is related to a count frequency associated with the sub-pixel image data.