Display Device Current Sensing Resolution Adaptation
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Solution Overview
Problem
Current display devices lack the ability to efficiently adjust current resolution based on different modes of operation, leading to suboptimal power management and luminance control, particularly when dealing with varying luminance values in display panels.
Innovation Solution
A display device and driving method that incorporate a current sensing unit capable of setting current resolution by calculating maximum measured current values corresponding to selected luminance modes, using a variable resistance sensing resistor unit to adjust voltage and current settings dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed current resolution is used in the current sensing unit, then the device complexity is reduced, but the adaptability to different luminance modes deteriorates
Solution Approach 1:
The patent implements dynamic switching of current resolution by providing multiple current resolution settings (first current resolution and second current resolution) that can be selectively activated based on the operating luminance mode. The current sensing unit dynamically adjusts its resolution through switching circuitry controlled by mode selection signals, allowing high resolution for low luminance modes and lower resolution for high luminance modes, thus achieving adaptability without permanent complexity.
Solution Approach 2:
The patent changes the operational parameter of the current sensing unit by switching between different current resolution values. The system selects between first and second current resolutions based on the luminance mode, effectively changing the measurement precision parameter to match the requirements of different operating conditions, thereby improving adaptability while managing device complexity.
2Measurement precision
If high current resolution is maintained for all modes, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by using high current resolution only when necessary (in low luminance modes where precise current control is critical) and reducing to lower resolution in high luminance modes where full precision is less critical. This selective application of high measurement precision reduces overall energy consumption while maintaining adequate measurement accuracy for each specific operating condition.
3Use of energy by moving object
If current resolution is reduced for high luminance modes, then energy consumption is reduced, but measurement precision deteriorates
Solution Approach 1:
The patent strategically changes the current resolution parameter based on luminance mode requirements. In high luminance modes, the system switches to lower current resolution to reduce energy consumption, accepting reduced measurement precision. In low luminance modes, the system switches to higher current resolution to maintain measurement precision. This dynamic parameter adjustment optimizes the trade-off between energy consumption and measurement precision for each operating condition.
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
This approach allows for precise control of current and voltage, optimizing power usage and luminance across different modes, thereby enhancing the efficiency and accuracy of display panel operation.
Implementation Method 1
the current sensing unit measures a voltage value across both ends of the resistor and calculates a driving current value using a resistance value of the resistor and a measured voltage value
Data Source
AI summary
A display device includes a display panel which is driven in a mode selected from among a plurality of modes including different luminance values, a voltage generator which generates a driving voltage, a resistor connected to an output terminal, from which the driving voltage is output, a current sensing unit connected in parallel to the resistor, where the current sensing unit measures a voltage value across both ends of the resistor and calculates a driving current value using a resistance value of the resistor and a measured voltage value, and a maximum current calculating unit which calculates a maximum measured current value corresponding a the luminance value of a selected mode and outputs a selection signal corresponding to the maximum measured current value, and the current sensing unit sets a maximum measured voltage value corresponding to the maximum measured current value in response to the selection signal.