Set-Voltage Generation Circuit for OLED Gamma Voltage Compensation
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Solution Overview
Problem
OLED display devices experience poor display performance due to external factors like temperature and instability in their own circuits, leading to fluctuations in gamma main voltage, which affect the stability of real-time data voltage and result in compensation errors.
Innovation Solution
A set-voltage generation unit is introduced, comprising a voltage generation circuit that generates a set voltage based on a gamma main voltage, with a voltage coefficient K, and an adjustment circuit that adjusts K according to real-time data voltage, ensuring the set voltage varies proportionally with the gamma main voltage to eliminate compensation errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the set voltage is kept fixed to simplify the circuit, then the circuit complexity is reduced, but compensation errors occur due to gamma main voltage fluctuations
Solution Approach 1:
The patent applies the dynamics principle by making the set voltage dynamic rather than fixed. The voltage generation circuit continuously adjusts the set voltage based on the gamma main voltage fluctuations, allowing the system to adapt to changing conditions and eliminate compensation errors while maintaining reasonable circuit complexity through automated adjustment mechanisms.
Solution Approach 2:
The patent implements feedback by using the gamma main voltage as a reference to automatically adjust the set voltage. The voltage generation circuit monitors gamma main voltage fluctuations and dynamically modifies the set voltage accordingly, creating a closed-loop system that eliminates compensation errors without requiring complex manual intervention.
2Reliability
If the set voltage is adjusted to follow gamma main voltage fluctuations, then compensation accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent uses an intermediate voltage generation circuit that acts as a mediator between the gamma main voltage and the set voltage. This intermediary circuit simplifies the overall system by providing automated voltage adjustment based on gamma main voltage fluctuations, reducing the need for complex compensation mechanisms elsewhere in the system.
Solution Approach 2:
The voltage generation circuit creates a scaled copy of the gamma main voltage fluctuations to adjust the set voltage. By copying the fluctuation pattern with a voltage coefficient K (where 0 < K ≤ 1), the system maintains compensation accuracy while using a relatively simple circuit implementation that doesn't require complex processing.
3Stability of the object's composition
If the voltage coefficient K is increased to reduce the impact of gamma main voltage, then the stability is improved, but the compensation performance deteriorates
Solution Approach 1:
The patent applies parameter changes by adjusting the voltage coefficient K within a specific range (0 < K ≤ 1) to optimize the balance between stability and compensation performance. This parameter adjustment allows the system to maintain adequate voltage stability while preserving the ability to compensate for gamma main voltage fluctuations, achieving both goals simultaneously.
Data Source
AI summary
The present disclosure provides a set-voltage generation unit, a set-voltage generation method and a display device. The set-voltage generation unit includes a voltage generation circuit. The set-voltage generation unit is configured to generate a set voltage according to a gamma main voltage such that a ratio between a variation of the set voltage and a variation of the gamma main voltage is a voltage coefficient K, and K is a positive number less than or equal to 1.