Display Gamma Decoder Switching to Reduce Line Count and Capacitance
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Solution Overview
Problem
Current display devices face challenges in reducing the number of gamma lines, which increases with higher resolution, leading to larger size and increased parasitic capacitance, affecting performance and design efficiency.
Innovation Solution
A display apparatus with a decoder that includes a first switching control block to select gamma gray level values based on high bits and a second switching control block to combine these values based on low bits, reducing the number of gamma lines and using a non-interpolation control block to output gamma gray level values as channel values, thereby reducing the decoder's size and parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of gamma lines is increased to support high resolution, then the display resolution is improved, but the decoder size and parasitic capacitance increase
Solution Approach 1:
The patent segments the gamma gray level values into multiple sections and uses switching control blocks to selectively activate only the required sections based on input data. This divides the full 256-stage gamma lookup table into manageable segments, reducing the active decoder area while maintaining high resolution capability when needed.
Solution Approach 2:
The patent implements dynamic switching between different gamma line configurations using switching control blocks. The decoder can dynamically activate or deactivate specific gamma lines based on the input data requirements, allowing the decoder size to adapt rather than being fixed for maximum resolution support.
2Measurement precision
If the number of gamma lines is increased to support high resolution, then the display resolution is improved, but the parasitic capacitance increases
Solution Approach 1:
By segmenting the gamma gray level values into sections and using switching control, the patent reduces the number of simultaneously active gamma lines. This segmentation isolates parasitic capacitance to smaller subsets of lines rather than all 256 lines being active, thereby reducing total parasitic capacitance while maintaining resolution capability.
Solution Approach 2:
The dynamic switching mechanism allows the system to activate only the necessary gamma lines for the current display requirements. This dynamic activation reduces parasitic capacitance by keeping fewer lines in an active state, while still providing access to high resolution when the full gamma table is activated as needed.
3Measurement precision
If all gamma gray level values are output through the decoder, then the gray level accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent segments the gamma gray level output into multiple sections, each handled by dedicated switching control blocks. This segmentation allows the complex task of managing 256 gray levels to be divided into smaller, more manageable sections, reducing overall decoder complexity while maintaining full gray level accuracy capability.
Solution Approach 2:
The dynamic switching control blocks enable the decoder to activate only the specific gray level sections required for the current operation. This dynamic approach reduces device complexity by avoiding the need for all gray level pathways to be simultaneously active, while still providing access to the complete 256-stage gray level range when needed.
Data Source
AI summary
A decoder of a display apparatus and a decoding method thereof is provided. The decoder comprises a first switching control block configured to select at least two section values from a plurality of gamma gray level values based on predetermined low bits of inputted data, and a second switching control block configured to select section values from the at least two selected section values based on predetermined high bits of the data and output at least two channel values.