Display Power Supply Control Using Frame Load and Grayscale
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Solution Overview
Problem
Display devices face challenges in efficiently reducing unnecessary power consumption while performing net power control and variable power supply voltage functions.
Innovation Solution
A display device with a driving control circuit that determines a scale factor based on input frame data load and maximum grayscale to optimize buck-converting efficiency, reducing power consumption by adjusting power supply voltages through a driving voltage supplying circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the display device performs net power control function and variable power supply voltage function, then power consumption is reduced, but the driving voltage supplying circuit consumes unnecessary power
Solution Approach 1:
The patent applies dynamics by making the power supply voltage variable rather than fixed. The driving control circuit dynamically adjusts the power supply voltage to the driving voltage supplying circuit based on the load of input frame data, enabling the system to adapt its power consumption to actual operational needs and eliminate unnecessary power waste.
Solution Approach 2:
The patent changes the parameter of power supply voltage from a constant value to a variable parameter. By determining the power supply voltage based on the load of input frame data through the driving control circuit, the system optimizes the operating parameters of the driving voltage supplying circuit to match actual power requirements, thereby reducing unnecessary energy loss.
2Use of energy by moving object
If the driving control circuit determines scale factor and power supply voltage based on load and maximum grayscale, then buck-converting efficiency is optimized, but device complexity increases
Solution Approach 1:
The driving control circuit performs multiple functions: it determines the scale factor for net power control, calculates the maximum grayscale of input frame data, determines the power supply voltage for the driving voltage supplying circuit, and generates the power supply voltage signal. By consolidating these related control functions into a single circuit, the patent achieves multi-functionality that optimizes buck-converting efficiency without proportionally increasing overall system complexity.
Solution Approach 2:
The patent merges the control functions for scale factor determination, maximum grayscale calculation, and power supply voltage control into a single driving control circuit. This consolidation integrates multiple control tasks that work together to optimize buck-converting efficiency, reducing the need for separate dedicated circuits for each function.
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 display device efficiently reduces unnecessary power consumption by optimizing buck-converting efficiency, improving power consumption performance.
Implementation Method 1
the driving voltage supplying circuit may generate the first power supply voltage by buck-converting the input power supply voltage
Data Source
AI summary
A display device may include a display panel, a gate driving circuit, a data driving circuit, a driving voltage supplying circuit, and a driving control circuit that controls the gate driving circuit, the data driving circuit, and the driving voltage supplying circuit. The driving voltage supplying circuit supplies a gate driving voltage, a data driving voltage, and a panel driving voltage including a first power supply voltage and a second power supply voltage lower than the first power supply voltage. The driving control circuit determines a scale factor based on a load of input frame data, generates output frame data by applying the scale factor to the input frame data, and determines the first power supply voltage and an input power supply voltage for generating the first power supply voltage based on a maximum grayscale of the input frame data and a load of the output frame data.