公开(公告)号：US12217687B1

公开(公告)日：2025-02-04

申请号：US18485628

申请日：2023-10-12

Applicant: Samsung Display Co., LTD.

Inventor： Gregory William Cook

IPC: G09G3/3233

Abstract: A method of compensating for accumulated stress for a display device includes receiving consecutive frames of display data including pixel data, then producing compensated display data from the received display data using a stress profile of accumulated stress of a display panel where the compensated display data includes a plurality of consecutive frames. The method further includes providing the compensated display data to the display panel for display, sampling the compensated display data to produce a plurality of sampled pixel data for a plurality of pixels disposed in a block of spatially contiguous pixels, where the block of spatially contiguous pixels includes a pixel, producing a quantized unbiased average stress value for the pixel using the plurality of sampled pixel data, the producing of the quantized unbiased average stress value including adding a dither value, and updating the stress profile using the produced quantized unbiased average stress value.

公开(公告)号：US12113554B2

公开(公告)日：2024-10-08

申请号：US17939643

申请日：2022-09-07

Applicant: Samsung Display Co., Ltd.

Inventor： Gregory William Cook

IPC: H03M7/40 ,  H03M7/30 ,  H03M7/42

CPC classification number: H03M7/4093 ,  H03M7/3079 ,  H03M7/40 ,  H03M7/405 ,  H03M7/4062 ,  H03M7/42 ,  H03M7/6017 ,  H03M7/6023 ,  G06F2212/401

Abstract: A memory device includes a memory; and at least one processor configured to: obtain a symbol stream including a plurality of symbols; determine a Huffman tree corresponding to the symbol stream, wherein each symbol of the plurality of symbols is assigned a corresponding prefix code from among a plurality of prefix codes based on the Huffman tree; generate a prefix length table based on the Huffman tree, wherein the prefix length table indicates a length of the corresponding prefix code for each symbol; generate a logarithm frequency table based on the prefix length table, wherein the logarithm frequency table indicates a logarithm of a frequency count for each symbol, generate a cumulative frequency table which indicates a cumulative frequency count corresponding to each symbol; generate a compressed bitstream by iteratively applying an encoding function to the plurality of symbols based on the logarithm frequency table and the cumulative frequency table; and store the compressed bitstream in the memory.

公开(公告)号：US20230236796A1

公开(公告)日：2023-07-27

申请号：US17713050

申请日：2022-04-04

Applicant: Samsung Display Co., Ltd.

Inventor： Gregory William Cook

IPC: G06F7/533 ,  G06F7/58

CPC classification number: G06F7/5334 ,  G06F7/582

Abstract: A communication system includes: a transmitter including: an arithmetic decoder configured to generate an output symbol based on input bits and a symbol frequency table that sets frequencies of excluded symbols to 0 and frequencies of allowed symbols to non-zero values, the transmitter being configured to iteratively generate a sequence of restricted packets and an ending state, the sequence of restricted packets excluding instances of the one or more excluded symbols and to transmit the sequence of restricted packets and the ending state on a channel; and a receiver including: an arithmetic encoder configured to compute an output state based on an input state, an input symbol, and the symbol frequency table, the receiver being configured to: supply an ending state received from the channel and the restricted packets to the arithmetic encoder to iteratively generate a final state, and recover a bit sequence from the final state.