Data Driving Circuit Charge Sharing Grayscale Control
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Solution Overview
Problem
Liquid crystal display data driving chips face limitations in power consumption and heat generation, with existing solutions providing only limited heat dissipation and inefficient power management.
Innovation Solution
A data driving circuit with cascaded units and charge sharing units, where a comparison module and switching transistor are used to compare digital video data and control charge sharing based on grayscale values, optimizing power consumption and reducing excessive operation of the switching transistor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If charge sharing function is improved in internal circuitry, then power consumption is reduced, but temperature of chip increases
Solution Approach 1:
The patent applies preliminary action by comparing digital video data before the switching transistor operates. The comparison module pre-evaluates whether charge sharing is needed by comparing grayscale values, so the switching transistor only activates when necessary. This prevents unnecessary operation that would generate heat, while still achieving power consumption reduction through selective charge sharing.
2Use of energy by moving object
If switching transistor operates continuously for charge sharing, then power consumption is reduced, but heat generation increases
Solution Approach 1:
The patent implements feedback by using the comparison module to continuously monitor digital video data and control the switching transistor accordingly. When the comparison module detects that grayscale values require charge sharing, it activates the switching transistor; otherwise, it remains inactive. This feedback mechanism ensures the transistor operates only when needed, reducing both power consumption and heat generation.
3Temperature
If heat dissipation pad is applied to outside of chip, then heat dissipation is improved, but power consumption and temperature improvement remain limited
Solution Approach 1:
The patent extracts the heat generation problem at its source by preventing unnecessary switching transistor operation through the comparison module. Instead of merely dissipating heat externally with a heat dissipation pad, the invention removes the root cause of excessive heat generation by selectively enabling charge sharing only when grayscale values require it, thereby improving both power consumption efficiency and reducing heat generation at the source.
Data Source
AI summary
A data driving circuit and a display device are provided in the present application. In the present application, a comparison module of a charge sharing unit module is connected to a latch module for comparing a digital video data stored in a corresponding pair of data driving units, a switching transistor is connected output terminals of the corresponding pair of the data driving units, an output terminal of the comparison module is connected to an control terminal of the switching transistor for turning on the switching transistor while a grayscale value of the digital video data being greater than a default grayscale value, so that the output terminals of the corresponding pair of the data driving units are connected for charge sharing.