Gamma Voltage Generator Dynamic Buffer Mode Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies face challenges in rapidly settling and stabilizing gamma voltages, especially under high frame rate operations, leading to display inefficiencies and chromatic differences when multiple source driver circuits drive the same display panel.
Innovation Solution
The introduction of dynamic buffers and variable resistor units in the gamma voltage generator allows for mode switching based on display data changes, improving the settling and stabilization speed of gamma voltages while reducing power consumption and chromatic differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If dynamic buffers are introduced to accelerate gamma voltage settling, then the settling speed is improved, but the device complexity increases
Solution Approach 1:
The patent implements dynamic buffers that can switch between different operational modes (first mode and second mode) based on display data changes. This dynamic configuration allows the system to accelerate gamma voltage settling when needed while maintaining a simpler operational state during stable conditions, thus resolving the contradiction between settling speed and device complexity
Solution Approach 2:
The dynamic buffers operate periodically based on display data updates rather than continuously. By activating the buffers only when display data changes occur, the system achieves rapid settling when required while reducing overall operational complexity and power consumption during stable display states
2Area of stationary object
If multiple source driver circuits drive the same display panel, then the display area is expanded, but chromatic differences occur
Solution Approach 1:
The patent employs a feedback mechanism where the gamma voltage generator receives feedback information from multiple source driver circuits and adjusts the gamma voltages accordingly. This feedback loop ensures that all source driver circuits maintain consistent gamma voltage levels, eliminating chromatic differences while enabling expanded display area through multiple drivers
3Loss of time
If gamma voltages are rapidly settled, then the display response time is reduced, but power consumption increases
Solution Approach 1:
The dynamic buffers are activated only during display data updates rather than operating continuously. This periodic operation allows rapid gamma voltage settling when display changes occur while significantly reducing power consumption during stable display states, thus resolving the contradiction between response time and power consumption
Data Source
AI summary
A gamma voltage generator, a source driver and a display apparatus are provided. The gamma voltage generator includes a gamma voltage generating circuit and a plurality of buffers. The gamma voltage generating circuit has a plurality of voltage input end nodes and a plurality of voltage output end nodes for outputting the predetermined number of gamma voltages based on input voltages from the plurality of voltage input end nodes. Each buffer has an input end receive a corresponding gamma reference voltage, and an output end coupled to a corresponding voltage input end node. The gamma voltage generating circuit includes multiple resistor units connected in series, and each resistor unit is configured to have a second resistance value when operating in the second mode less than a first resistance value when operating in the first mode.