Robert Chi Lo

US Patent:

20230027570, Jan 26, 2023

Filed:

Jul 14, 2022

Appl. No.:

17/865298

Inventors:

- Mountain View CA, US
Robert Lo - Santa Clara CA, US

International Classification:

G09G 3/3233
G11C 19/28

Abstract:

A backplane for driving a display includes a two-dimensional array of pixel drive circuits, organized as a plurality of rows and a plurality of columns. The backplane has at least one shift register addressing assembly that includes a shift register chain formed of a plurality of controlling shift registers serially connected with, and separated by, equal sized groups of non-controlling shift registers. Each controlling shift register controls a different one of a plurality of word lines that each connect with pixel drive circuits of one row. The backplane also includes a plurality of bit lines that each connect with pixel drive circuits of one column. A shift register data sequence is input to a first one of the plurality of controlling shift registers and propagates through the shift register chain to control the plurality of word lines to load display values from the bit lines into the pixel drive circuits.

US Patent:

20210256901, Aug 19, 2021

Filed:

Feb 18, 2021

Appl. No.:

17/178576

Inventors:

- Hsinchu City, TW
Robert Lo - Santa Clara CA, US

International Classification:

G09G 3/32
G09G 3/34

Abstract:

A backplane operative to drive an array of emissive pixel elements forming a part of an automotive head lamp assembly is disclosed. Each pixel element comprises a memory cell operative to pulse width modulate a current mirror pixel drive circuit configured to drive an emissive element. The array of emissive pixel elements is divided into a plurality of interdigitated rows or columns serviced by independent row drivers or independent column drivers that may be driven by data selected to randomize the order in which the data on adjacent pixels of the same row are written, thereby effectively substantially reducing the visibility of any residual structures that may be present in the data driving the pixels of adjacent columns.