Organic Light Emitting Display Data Driver with Color Demultiplexers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional organic light emitting displays face challenges in efficiently driving red, green, and blue sub-pixels due to differences in emission efficiency, leading to increased power consumption and the need for multiple data driving circuits, which complicates panel size and manufacturing costs.
Innovation Solution
The implementation of a data driver system that includes demultiplexers and data driving circuits to generate and supply analog data signals to sub-pixels, with each demultiplexer receiving signals from separate data driving circuits for red, green, and blue, allowing for reduced power consumption by optimizing gamma values and sharing data driving circuits across multiple sub-pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple data driving circuits are provided for each data line (red, green, blue), then data driving capability is improved, but panel size and manufacturing cost increase
Solution Approach 1:
The patent merges multiple data driving circuits by sharing common circuits among different color sub-pixels. Specifically, red, green, and blue data driving circuits share common components, reducing the total number of circuits from 3 separate circuits to a shared circuit structure, thereby decreasing panel size while maintaining data driving capability
Solution Approach 2:
The data driving circuit is designed with multi-functionality to serve multiple color sub-pixels. The same data driving circuit can drive red, green, and blue sub-pixels through time-division or signal routing, making the circuit universal rather than dedicated to a single color, thus reducing the number of required circuits
2Measurement precision
If separate data driving circuits are provided for red, green, and blue sub-pixels, then data driving precision is improved, but power consumption increases
Solution Approach 1:
By merging data driving circuits for different colors, the patent reduces the total number of active circuits, thereby reducing overall power consumption while maintaining precision through shared precision components and synchronized operation across color channels
3Device complexity
If data driving circuits process red, green, and blue data together, then device complexity is reduced, but power consumption increases due to gamma value adjustments
Solution Approach 1:
The patent segments the data driving process by handling red, green, and blue data separately through dedicated data driving circuits for each color, then combining their outputs. This segmentation allows optimized gamma value adjustment for each color channel, reducing unnecessary power consumption compared to processing all colors together with a single circuit
Data Source
AI summary
An organic light emitting display having color-specific demultiplexers is disclosed. Each demultiplexer receives a data signal for a specific color and sequentially supplies the data signals to sub-pixels for the specific color. Therefore, a data driving circuit supplying the data signal to the demultiplexer receives and successively processes only data of the specific color, so that power loss due to data charging/discharging operations is reduced when specific color sub-pixels of neighboring pixels receive the data signal corresponding to similar gray-scale voltages.