Data Driver Reducing Transmission for High Color Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing data drivers face challenges in achieving high image quality with increased color depth while maintaining a small size, as they require larger internal components and increased data transmission amounts to process higher bit numbers, which complicates the realization of N-bit color depth using n-bit image data.
Innovation Solution
A data driver design that includes a latch unit for storing n-bit image data, a conversion unit for converting N-bit digital data (including n-bit image data and variable m-bit pseudo control data) into an analog voltage, and an output unit for supplying a data voltage, allowing for N-bit color depth with reduced component sizes and data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of bits in the image data is increased to improve color depth and image quality, then the color depth (expression) is increased and image quality is improved, but the sizes of the internal components in the data driver are necessarily increased and the data transmission amount is necessarily increased
Solution Approach 1:
The patent segments the N-bit digital data into n-bit image data and m-bit pseudo control data (where N=n+m). The latch unit stores only the essential n-bit image data, while the pseudo control data is generated separately. This segmentation allows the internal components to process fewer bits (n-bit instead of N-bit), reducing component size while maintaining N-bit color depth capability through the combination of stored image data and generated control data.
2Measurement precision
If the number of bits in the image data is increased to improve color depth and image quality, then the color depth (expression) is increased and image quality is improved, but the data transmission amount is necessarily increased
Solution Approach 1:
The patent extracts only the essential n-bit image data from the N-bit digital data for storage in the latch unit. The remaining m-bit pseudo control data is not transmitted but generated separately based on the stored image data. This extraction reduces the data transmission amount from N bits to n bits while still achieving N-bit color depth through the combination of transmitted image data and generated control data.
3Adaptability or versatility
If the sizes of the internal components in the data driver are increased to process higher bit numbers, then the color depth capability is improved, but the size of the data driver is necessarily increased
Solution Approach 1:
The patent segments the processing requirements into two parts: storing n-bit image data in the latch unit and generating m-bit pseudo control data separately. This allows the latch unit and other internal components to be designed for n-bit processing rather than full N-bit processing, significantly reducing the area of internal components while maintaining the capability to output N-bit color depth data through the combination of stored and generated data.
Data Source
AI summary
Provided is a data driver, a driving method of the data driver, and a display device. The data driver includes a latch unit configured to store n-bit image data, wherein n≥2; a conversion unit configured to convert N-bit digital data including the n-bit image data and variable m-bit pseudo control data into an analog voltage and then output the analog voltage, wherein m≥1; and an output unit configured to output a data voltage based on the analog voltage. The data driver is capable of supplying a high image quality based on N-bit digital data with a small circuit size that is based on n-bit image data.