Display Driver Encoder for PenTile Image Data Compression
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Solution Overview
Problem
Higher resolution flat panel displays experience increased power consumption and signal interference due to higher memory usage, leading to malfunctions.
Innovation Solution
A display driving device employing an encoder that calculates errors using binary and DPCM encoding schemes to select the most efficient scheme for compressing and decompressing image data, reducing memory usage and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If higher resolution is used in flat panel displays, then display quality is improved, but power consumption increases
Solution Approach 1:
The display data is divided into multiple data groups that can be selectively stored in memory. By segmenting the data and using compression techniques on specific segments, the overall memory usage and power consumption are reduced while maintaining high display resolution
Solution Approach 2:
The patent applies different compression schemes (binary encoding, DPCM encoding) to different data groups based on their characteristics. By changing the encoding parameters dynamically, the system achieves efficient compression that reduces memory usage and power consumption without compromising display quality
2Measurement precision
If higher resolution is used in flat panel displays, then display quality is improved, but signal interference increases
Solution Approach 1:
By dividing display data into multiple groups and selectively compressing them, the patent reduces the overall data volume that needs to be transmitted through source lines. This segmentation approach minimizes the number of lines required, thereby reducing signal interference and voltage drops
Solution Approach 2:
The patent dynamically selects compression schemes based on data characteristics, changing encoding parameters to optimize data representation. This reduces data volume and transmission requirements, minimizing signal interference on the source lines
3Measurement precision
If memory usage is increased in display driving circuits, then higher resolution processing is enabled, but device complexity increases
Solution Approach 1:
The patent applies different compression schemes (binary encoding, DPCM encoding) to different data groups based on their characteristics. By changing the encoding parameters dynamically, the system achieves efficient compression that reduces memory usage and power consumption without compromising display quality
Solution Approach 2:
The patent uses encoding schemes that create compact representations of display data. By creating compressed copies of the data in memory rather than storing full-resolution data, the system reduces memory usage while maintaining the ability to display high-resolution images
Data Source
AI summary
Disclosed is a display driving device, a display device including the same, and an image data compression and decompression method. The display driving device comprises an encoder that compresses PenTile® matrix encoded input image data using a binary encoding scheme and a DPCM encoding scheme, calculates errors produced by each encoding scheme, and selects an encoding scheme mode and its compressed data according to the calculated errors. A decoder decompresses the compressed data according to a decoding scheme corresponding to the selected encoding scheme mode. And a source driver drives source lines connected with a display panel based on decompressed data.