Gamma Voltage Generation Circuit Adaptation
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Solution Overview
Problem
Existing Gamma voltage generation circuits in liquid crystal display panels deviate from ideal Gamma curves when the voltage-light transmissivity curve changes, requiring redesign and extending production cycles, thus degrading efficiency.
Innovation Solution
A Gamma voltage generation circuit with multiple resistors connected in series and voltage selectors to generate candidate voltages for non-linear regions, allowing selection of suitable voltages to match the ideal Gamma curve, without needing to redesign the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a Gamma voltage generation circuit uses voltage division with resistors to generate Gamma voltages, then the circuit can generate the required Gamma voltages, but the actual Gamma curve deviates from the ideal Gamma curve when the V-T curve changes
Solution Approach 1:
The patent introduces voltage selectors that can dynamically switch between different resistor combinations, allowing the Gamma voltage generation circuit to adapt to different V-T curves. The circuit transitions from a static resistor configuration to a dynamic selectable configuration, enabling real-time adjustment of Gamma voltages to match changing display characteristics without physical redesign.
Solution Approach 2:
The patent changes the resistance parameters by selecting different resistor combinations from multiple available resistors. Instead of using a fixed resistor configuration, the system varies the resistance values dynamically to generate different Gamma voltage sets, allowing the same hardware to serve multiple V-T curve requirements by changing electrical parameters rather than physical structure.
2Manufacturing precision
If the Gamma voltage generation circuit is redesigned to match a new V-T curve, then the Gamma curve precision improves, but the production cycle extends by one month
Solution Approach 1:
The voltage selector mechanism enables dynamic reconfiguration of the Gamma voltage generation circuit without physical redesign. When a new V-T curve is required, the system switches to different resistor combinations through electrical control rather than mechanical replacement, reducing the production cycle from one month to a matter of software configuration.
Solution Approach 2:
Instead of redesigning the circuit hardware, the system achieves adaptation by changing the selected resistance parameters through voltage selector control. This parameter-based approach eliminates time-consuming physical redesign and manufacturing processes, maintaining high production efficiency while achieving precise Gamma curve matching.
3Adaptability or versatility
If more resistors are added to generate more candidate voltages, then the adaptability to different V-T curves improves, but the device complexity increases
Solution Approach 1:
The patent segments the resistor network into multiple independent resistor branches that can be selectively combined. Each resistor or resistor group represents a discrete voltage level, and the voltage selector combines these segmented elements in different configurations to generate various Gamma voltage sets. This segmentation allows systematic management of complexity through modular organization.
Solution Approach 2:
The voltage selector circuit serves multiple functions: it selects different resistor combinations, generates different Gamma voltage sets, and adapts to different V-T curves using the same hardware infrastructure. This multi-functionality justifies the added complexity by providing a single circuit that replaces what would otherwise require multiple dedicated circuits for different display requirements.
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 allows the Gamma voltage generation circuit to adapt to different voltage-light transmissivity curves, improving production efficiency by enabling the actual Gamma curve to closely match the ideal curve without redesigning the circuit.
Implementation Method 1
the Gamma voltage generation circuit generally generates the Gamma voltages by way of voltage division with resistors in series
Implementation Method 2
voltage selectors connected to common ends of every two adjacent resistors of the multiple resistors, configured to select at least one candidate voltage
Data Source
AI summary
The present invention provides a Gamma voltage generation circuit and method and a data driver. The circuit includes multiple resistors connected in series, configured to generate multiple candidate voltages corresponding to non-linear regions of a voltage-light transmissivity curve, the number of the multiple candidate voltages being more than the number of Gamma voltages corresponding to the non-linear regions of the voltage-light transmissivity curve; and voltage selectors connected to common ends of every two adjacent resistors of the multiple resistors, configured to select at least one candidate voltage from the multiple candidate voltages as the Gamma voltage(s) corresponding to the non-linear regions of the voltage-light transmissivity curve so that an actual Gamma curve coincides with an ideal Gamma curve, each common end corresponding to a candidate voltage. The Gamma voltage generation circuit according to the present invention is applicable to display panels with different voltage-light transmissivity curves.