Data Driving Device Gamma Compensation Circuit Simplification
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Solution Overview
Problem
Existing data driving devices for display devices require complex circuit configurations to output independent gamma compensation voltages for each color, leading to increased costs and complexity.
Innovation Solution
A data driving device with a simplified circuit configuration that uses a single voltage divider circuit and digital-to-analog converters to convert pixel data into gamma compensation voltages for each color, allowing for sequential selection and output of gamma reference voltages, thereby reducing the number of required components and simplifying the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If independent gamma compensation voltages are generated for each color using separate circuit components, then gamma compensation precision for each color is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the gamma compensation functions for multiple colors into a single shared circuit architecture. Instead of having separate voltage generation circuits for each color channel, the invention uses one voltage generation circuit that sequentially serves multiple colors through time-division multiplexing, thereby reducing component count while maintaining compensation precision
Solution Approach 2:
The patent implements periodic action by sequentially selecting different color channels at different time periods. The single voltage generation circuit alternates between serving different color sub-pixels in a periodic manner, with each color receiving its dedicated gamma compensation voltage during its assigned time slot, thus achieving both circuit simplification and color-specific precision
2Reliability
If independent gamma compensation voltages are generated for each color using separate circuit components, then gamma compensation performance is improved, but manufacturing cost increases
Solution Approach 1:
The invention combines multiple color channel gamma compensation functions into a single integrated circuit module, reducing the total number of components that need to be manufactured and assembled. This merging approach lowers manufacturing complexity and cost while preserving the performance benefits of color-specific gamma compensation through temporal separation
3Device complexity
If a simplified circuit configuration with shared voltage divider circuit is used, then device complexity is reduced, but the ability to provide independent gamma compensation for each color may be compromised
Solution Approach 1:
The patent resolves this contradiction by implementing periodic time-division multiplexing where the shared voltage divider circuit provides dedicated gamma compensation voltages to different color channels at different time periods. Each color sub-pixel receives its color-specific gamma compensation voltage during its active period, ensuring that the simplified shared circuit maintains full color-specific adaptability through temporal separation
Data Source
AI summary
Disclosed herein are a data driving device and a display device using the same. The data driving device includes a selector for sequentially selecting pieces of gamma reference data input from banks in the order of a first color, a second color, and a third color, and a voltage output part for converting the pieces of gamma reference data for each color, which is sequentially input, into gamma reference voltages.