Gamma Voltage Generator Common Reference Sharing
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Solution Overview
Problem
As the resolution of display panels increases, power consumption in organic light emitting display devices rises, and existing technologies face challenges in efficiently generating gamma voltages while managing the complexity and cost of reference gamma voltage generation.
Innovation Solution
A gamma voltage generator is designed with a reference gamma voltage generating circuit and a gamma voltage generating circuit, using a common reference gamma voltage level equal to at least two selected reference gamma voltage levels for sub-pixels, and interpolating these voltages using resistor strings with different resistances to reduce the number of channels and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate reference gamma voltages are generated for each sub-pixel to account for different gamma characteristics, then display quality is improved, but device complexity and production cost increase
Solution Approach 1:
The patent merges the generation of reference gamma voltages by identifying a common reference gamma voltage level that can be shared across multiple sub-pixels (red, green, and blue). Instead of generating completely separate reference voltage sets for each sub-pixel type, the invention combines the common levels and allows different sub-pixels to share these reference voltages, thereby reducing overall device complexity while maintaining display quality through selective sharing rather than complete separation.
2Measurement precision
If more reference gamma voltage channels are provided for each sub-pixel, then gamma voltage generation accuracy is improved, but power consumption increases
Solution Approach 1:
The patent applies universality by designing reference gamma voltage channels that serve multiple sub-pixel types. A single reference gamma voltage channel can be utilized by red, green, and blue sub-pixels when their gamma characteristics align at certain voltage levels. This multi-functional approach reduces the total number of active voltage generation channels needed, thereby lowering power consumption while maintaining the precision required for accurate gamma voltage generation across all sub-pixel types.
3Adaptability or versatility
If independent gamma voltage generation circuits are used for each sub-pixel type, then adaptability to different gamma characteristics is improved, but production cost increases
Solution Approach 1:
The patent segments the reference gamma voltage generation into two distinct parts: common reference gamma voltage levels that are shared across all sub-pixel types, and sub-pixel-specific adjustments or selections. This segmentation allows the system to maintain adaptability to different gamma characteristics through selective usage of common levels while avoiding the need for completely independent generation circuits for each sub-pixel type, thereby reducing production cost while preserving necessary adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption and production costs by minimizing the number of channels for reference gamma voltages and allowing for efficient gamma voltage generation across sub-pixels, independent of their gamma characteristics.
Implementation Method 1
a first resistor string configured to generate the first gamma voltages by interpolating the first reference gamma voltages and the common reference gamma voltage
Data Source
AI summary
A gamma voltage generator includes a reference gamma voltage generating circuit and a gamma voltage generating circuit. The reference gamma voltage generating circuit is configured to generate first reference gamma voltages, second reference gamma voltages, third reference gamma voltages, and a common reference gamma voltage. The gamma voltage generating circuit is configured to generate first gamma voltages, second gamma voltages, and third gamma voltages using the first reference gamma voltages, the second reference gamma voltages, the third reference gamma voltages, and the common reference gamma voltage.