Display Panel Driving Apparatus Static Current Control
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Solution Overview
Problem
Existing driving apparatuses for display panels consume excessive power due to high static current requirements, particularly in large-scale image outputting devices, as they maintain a high driving ratio signal during both enabling periods of the control signal and high driving ratio signal.
Innovation Solution
A driving apparatus with an adjusting circuit that dynamically adjusts the static current of the output buffer by setting the enabling period of the high driving ratio signal differently from the control signal, based on a preset time and the speed of the output voltage reaching the target voltage, and disables the high driving ratio signal when the input code remains unchanged, thereby reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the high driving ratio signal HDR is enabled during the enabling period P1 of the control signal TP, then the driving ability of the output buffer 110 is enhanced, but more power is consumed
Solution Approach 1:
The patent applies dynamics by making the enabling period of the high driving ratio signal HDR dynamic rather than fixed. The adjusting circuit dynamically adjusts the enabling period of HDR based on the enabling period of the control signal TP and a preset time, allowing the system to adaptively optimize between driving ability and power consumption根据不同工况调整工作参数
Solution Approach 2:
The patent changes the time parameter of the high driving ratio signal HDR by adjusting its enabling period. The adjusting circuit modifies the duration for which HDR is active, changing this key parameter to balance performance and energy consumption, thereby resolving the contradiction between driving ability and power consumption
2Reliability
If the enabling period of the high driving ratio signal HDR is the same as the enabling period of the control signal TP, then the output voltage VO can reach the target voltage, but power consumption increases
Solution Approach 1:
The patent applies partial action by enabling the high driving ratio signal HDR for only part of the control signal enabling period. Instead of keeping HDR enabled for the entire period P1, the adjusting circuit enables HDR for a calculated duration that is sufficient for the output voltage to reach the target voltage, then disables it to reduce power consumption
Solution Approach 2:
The system performs self-adjustment through the adjusting circuit, which automatically calculates and sets the appropriate enabling period for HDR based on the control signal characteristics and preset parameters, eliminating the need for external manual configuration and enabling adaptive optimization
Data Source
AI summary
A driving apparatus and a method for driving a display panel thereof are provided. The driving apparatus includes an output buffer, a switch, an adjusting circuit, a digital-to-analog converter and a code detecting unit. The output buffer provides an output voltage to a load according to a static current determining a speed of the output voltage reaching a target voltage for driving the load. The switch is coupled between the output buffer and the load in series, and is turned on or off according to a control signal. The code detecting unit detects an input code. The adjusting circuit determines whether the input code varies when the control signal is enabled, and disables a high driving ratio signal when the input code does not vary when the control signal is enabled. An enabling period of the high driving ratio signal is different from an enabling period of the control signal.