OLED Compensation Table Compression for Faster Data Burning
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Solution Overview
Problem
The large size of compensation tables in OLED display devices leads to significant storage space occupation and prolonged data transmission and burning times, degrading operation speed and manufacturing efficiency due to defects like mura (uneven luminance) which require extensive compensation data.
Innovation Solution
A compression method that encodes sequential data with equal values into a compressed file using marker bytes, stroke lengths, and stroke codes, reducing redundancy and data expansion, accompanied by a decompression method to accurately restore the original data, with a default threshold controlling the encoding process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If compensation table stores complete compensation data for each pixel, then display quality is improved, but storage space occupation increases
Solution Approach 1:
The patent merges adjacent pixels with identical compensation values into a single record containing start position, end position, and compensation value. This combining approach reduces storage space while preserving complete compensation information for all pixels, resolving the contradiction between maintaining display quality and reducing storage occupation.
Solution Approach 2:
The patent changes the data structure parameters from storing individual pixel compensation values to storing range-based compressed representations. By transforming the storage format from N individual records to M compressed records (where M < N), the patent reduces storage space while maintaining the ability to restore complete compensation data for display quality.
2Manufacturing precision
If compensation table stores complete compensation data for each pixel, then display quality is improved, but data transmission time increases
Solution Approach 1:
The patent merges adjacent pixels with identical compensation values into a single compressed record. This reduction in data volume from N individual pixel records to M compressed records directly decreases data transmission time while preserving complete compensation information needed for display quality.
Solution Approach 2:
The patent performs preliminary compression of compensation data before transmission or storage. By pre-compressing the data into a compact format with range information, the patent reduces the amount of data that needs to be transmitted, thereby reducing transmission time while maintaining the ability to restore full compensation data for display quality.
3Manufacturing precision
If compensation table stores complete compensation data for each pixel, then display quality is improved, but manufacturing efficiency decreases
Solution Approach 1:
The patent merges adjacent pixels with identical compensation values into compressed range records. This compression reduces both storage space and data processing volume, thereby improving manufacturing efficiency (burn-in time) while preserving complete compensation data for display quality.
Solution Approach 2:
The patent performs preliminary compression of compensation data before the burn-in process. By pre-compressing the data into a compact format, the patent reduces the time required to transmit and write compensation data to the display panel, thereby improving manufacturing efficiency while maintaining display quality through complete compensation information.
Data Source
AI summary
The invention provides a compression method and decompression method for compensation table of OLED display device, by performing encoding on the data with equal value successively arranged in the compensation table to compress the data amount of the compensation table, and by adjusting the default threshold to control the condition of starting a stroke encoding to prevent increasing redundancy and data expansion caused by encoding; as such, the compensation table is compressed, the system storage space occupied by the compensation table is reduced and the time of transmitting and burning data on production line is shortened.