Display Driving Circuit Gamma Chip Integration
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Solution Overview
Problem
Current liquid crystal panel driving systems require multiple control chips and gamma chips to adjust binding point voltages, leading to high costs, complex structures, and long maintenance cycles due to insufficient driving capability, especially for larger panel sizes.
Innovation Solution
A driving circuit incorporating a gamma chip with two types of output terminals and a data driving chip with operational amplifiers, where the operational amplifiers amplify currents for initial binding point voltages that do not meet the required driving capability, while directly transmitting voltages that already meet the requirement, simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple control chips and gamma chips are used to adjust binding point voltages, then the driving capability requirement is met, but the cost increases and the structure becomes complex
Solution Approach 1:
The patent merges the control chip and gamma chip functions into a single integrated driving circuit. The driving circuit includes a gamma voltage generation module that generates multiple gamma voltages, a voltage division module that divides these voltages to create binding point voltages, and an operational amplifier module that amplifies currents. This integration eliminates the need for separate control chips and gamma chips, reducing component quantity while maintaining the required driving capability for large display panels.
Solution Approach 2:
The driving circuit performs multiple functions within a single chip: it generates gamma voltages, divides voltages to create binding point voltages, amplifies currents to meet driving requirements, and controls the display panel. This multi-functional design replaces the traditional multi-chip architecture, simplifying the overall system structure while ensuring adequate driving capability.
2Reliability
If multiple control chips and gamma chips are used to adjust binding point voltages, then the driving capability requirement is met, but the maintenance cycle increases
Solution Approach 1:
By integrating all necessary functions (gamma voltage generation, voltage division, current amplification, and panel control) into a single driving circuit, the patent reduces the number of components that need to be diagnosed and maintained. Fewer separate chips mean fewer potential failure points and simpler troubleshooting procedures, thereby reducing the maintenance cycle.
3Manufacturing precision
If binding point voltages are generated by resistance voltage division, then the voltage level requirement is met, but the driving capability requirement is not met
Solution Approach 1:
The patent introduces an operational amplifier module as an intermediary between the voltage division module and the display panel. The voltage division module first generates binding point voltages with precise voltage levels, then the operational amplifier module amplifies the currents of these voltages to meet the driving capability requirements. This two-stage approach ensures both voltage level precision and sufficient driving capability.
Solution Approach 2:
The patent changes the current parameter of the binding point voltages after voltage division by using the operational amplifier module. The module amplifies the currents while maintaining the voltage levels, transforming the electrical parameters to simultaneously satisfy both voltage level precision and driving capability 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
The solution ensures that binding point voltages meet the driving capability requirements of the display panel, reducing costs and complexity, and enhancing maintenance efficiency by using operational amplifiers for current amplification and voltage following.
Implementation Method 1
a data driving chip including a processor and a plurality of operational amplifiers, output terminals of the operational amplifiers being correspondingly connected to terminals on the processor and being further connected to their own inverting input terminals; the first type of output terminals of the gamma chip being connected to non-inverting input terminals of one part of the operational amplifiers
Data Source
AI summary
A driving circuit includes a gamma chip configured to provide a plurality of initial binding point voltages; the gamma chip including a first type of output terminals and a second type of output terminals, currents corresponding to the initial binding point voltages outputted by the first type of output terminals being less than a preset driving current; and currents corresponding to the initial binding point voltages outputted by the second type of output terminals being greater than the preset driving current; and a data driving chip including a processor and a plurality of operational amplifiers.