Gamma Voltage Conversion Device for LCD Panel Adaptability
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Solution Overview
Problem
Conventional gamma voltage conversion devices are limited to converting gray level signals for specific gamma curves, such as gamma A for 3-volt LCD panels, and cannot adapt to different gamma curves like gamma B for 5-volt LCD panels, causing inconvenience and requiring separate devices for different types of panels.
Innovation Solution
A gamma voltage conversion device comprising a gamma voltage conversion circuit, operational amplifier, and gamma voltage adjusting circuit that can generate gamma driving voltages conforming to either gamma curve A or B, allowing selection between the two curves based on a gamma curve selection signal, enabling the device to drive both 3-volt and 5-volt LCD panels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional gamma voltage conversion device is designed to convert gray level signals for a specific gamma curve (e.g., gamma A for 3-volt LCD panels), then the device can achieve accurate gamma conversion for that specific curve, but it cannot adapt to different gamma curves (e.g., gamma B for 5-volt LCD panels)
Solution Approach 1:
The gamma voltage conversion device is designed to support multiple gamma curves (gamma A, gamma B, and other gamma curves) through a unified device structure. The device includes a gamma voltage conversion circuit with selectable differentials that can generate gamma voltages conforming to different gamma curves, and an operational amplifier that can output gamma driving voltages for different voltage levels (3-volt or 5-volt LCD panels). This multi-functional design allows one device to replace multiple dedicated devices.
Solution Approach 2:
The device incorporates a gamma curve selection signal that dynamically configures the gamma voltage conversion circuit to operate in different modes. Based on the selection signal, the differentials in the gamma voltage conversion circuit can be selectively enabled or disabled to generate gamma voltages conforming to different gamma curves. This dynamic reconfiguration allows the device to adapt to different gamma curve requirements without physical changes to the device structure.
2Ease of manufacture
If separate gamma voltage conversion devices are used for different types of LCD panels (3-volt and 5-volt), then each device can be optimized for its specific panel type, but the overall system complexity and manufacturing costs increase
Solution Approach 1:
The patent merges the functionality of multiple dedicated gamma voltage conversion devices into a single unified device. The device integrates a gamma voltage conversion circuit capable of generating gamma voltages for different gamma curves and an operational amplifier that can output gamma driving voltages for different voltage levels. This consolidation reduces the number of devices needed, simplifies system configuration, and lowers manufacturing costs while maintaining the ability to drive both 3-volt and 5-volt LCD panels.
Solution Approach 2:
The unified gamma voltage conversion device is designed with universal functionality to support both 3-volt and 5-volt LCD panels through the same device. The operational amplifier can be configured to output gamma driving voltages appropriate for different voltage levels, and the gamma voltage conversion circuit can generate gamma voltages conforming to different gamma curves. This universal design eliminates the need for separate devices for different panel types.
3Adaptability or versatility
If a gamma voltage conversion device is designed with fixed gamma curve conversion capability, then the device structure can be simplified, but the device cannot drive various types of LCD panels requiring different gamma curves
Solution Approach 1:
The device employs dynamic reconfiguration through a gamma curve selection signal that controls the state of differentials in the gamma voltage conversion circuit. Based on the selection signal, the circuit can switch between different gamma curve conversion modes (gamma A, gamma B, or other gamma curves). This dynamic capability allows the device to adapt to different LCD panel requirements while maintaining a relatively simple underlying circuit structure that can be flexibly configured.
Solution Approach 2:
The device changes its operational parameters based on the gamma curve selection signal. By adjusting which differentials are enabled or disabled in the gamma voltage conversion circuit, the device can generate gamma voltages that conform to different gamma curves. This parameter change approach allows the same physical circuit to produce different gamma voltage characteristics suitable for different types of LCD panels.
Data Source
AI summary
Gamma voltage conversion device includes a gamma voltage conversion circuit, an amplifier, and a gamma voltage adjusting circuit. The gamma voltage conversion circuit generates a first gamma voltage conformed to a first gamma curve according to a grey level. The amplifier includes a first input end receiving the first gamma voltage, a second end, and an output end. The amplifier outputs the first or a second gamma voltage conformed to a second gamma curve according to the grey level according to the first and the second ends of the amplifier. The gamma voltage adjusting circuit coupled between the second input end and the output end of the amplifier controls the amplifier to output the first or the second gamma voltage as the gamma driving voltage according to the grey level and a gamma curve selection signal.