Corner Cut Circuit for Liquid Crystal Panel Driving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal panel driving systems face complexity and high costs due to the need for complicated peripheral circuit wiring and fixed corner cut voltage adjustments, which are achieved by altering peripheral resistance.
Innovation Solution
A corner cut circuit in the liquid crystal panel driving system that includes a controller, signal converter, and discharge circuit, allowing for automatic adjustment of corner cut voltage through parallel communication and control of current sources with switches, simplifying the peripheral circuit and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If corner cut voltage is adjusted through peripheral resistance arrangement outside the power management chip, then corner cut voltage adjustment is achieved, but peripheral circuit wiring becomes complicated and cost increases
Solution Approach 1:
The patent integrates the corner cut voltage adjustment function directly into the power management chip by incorporating a discharge circuit with multiple current sources and control switches. This merging of the adjustment function into the chip eliminates the need for external peripheral resistance components and wiring, thereby reducing circuit complexity while maintaining voltage adjustment capability.
Solution Approach 2:
The power management chip performs self-adjustment of corner cut voltage through its internal discharge circuit controlled by the timing controller. The chip autonomously regulates its own output voltage characteristics without requiring external circuit modifications, enabling adaptive corner cut voltage adjustment while simplifying the overall system architecture.
2Adaptability or versatility
If corner cut voltage is adjusted through peripheral resistance arrangement outside the power management chip, then corner cut voltage adjustment is achieved, but cost increases
Solution Approach 1:
By integrating the corner cut voltage adjustment function directly into the power management chip through internal current sources and control switches, the patent eliminates the need for external peripheral components. This integration reduces component count and assembly complexity, thereby lowering manufacturing costs while maintaining full voltage adjustment capability.
Solution Approach 2:
The power management chip is designed with multi-functional capability, incorporating both the discharge circuit for corner cut voltage adjustment and the EL drive functions within a single integrated device. This universality eliminates the need for separate external adjustment circuits, reducing overall system cost while maintaining adaptability.
3Device complexity
If fixed corner cut voltage is used without adjustment capability, then circuit simplicity is maintained, but liquid crystal panel uniformity cannot be optimized
Solution Approach 1:
The patent transforms the static fixed corner cut voltage into a dynamic adjustable parameter through the discharge circuit controlled by the timing controller. The corner cut voltage can be dynamically adjusted based on panel characteristics and operating conditions, enabling optimization of liquid crystal panel uniformity while maintaining relatively simple circuit implementation through integrated control.
Solution Approach 2:
The patent enables change of the corner cut voltage parameter from a fixed value to an adjustable parameter through the internal discharge circuit. By modifying the voltage parameter dynamically through control signals, the system can optimize liquid crystal panel uniformity without significantly increasing circuit complexity, as the adjustment is achieved through software-controlled hardware.
Data Source
AI summary
A corner cut circuit in a liquid crystal panel driving system, wherein the corner cut circuit includes: a controller to provide a first signal for a signal converter; a signal converter to convert the first signal to a second signal for controlling discharging of a discharge circuit, and to provide the second signal to the discharge circuit; and a discharge circuit to generate a corner cut voltage of the corner cut circuit according to the second signal provided by the signal converter. According to the corner cut circuit, a corner cut voltage can be automatically adjusted, a peripheral circuit is simplified, and the cost is reduced.