Luminance Control via Dynamic Voltage Adjustment
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Solution Overview
Problem
Reducing electric power consumption in display units with current-driven optical elements to minimize adverse effects on display quality, as excessive reduction in current can lead to significant luminance decrease.
Innovation Solution
A luminance controlling unit that dynamically adjusts the potential difference between two voltages applied to current-driven self-luminescent elements in a display unit, based on the maximum signal level detected using a threshold set according to image signal characteristics and viewer position or distance, to maintain display quality while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the magnitude of current is reduced to suppress increase in electric power consumption, then power consumption is reduced, but luminance of the display unit decreases
Solution Approach 1:
The patent applies dynamics by dynamically adjusting the potential difference between first and second voltages based on the maximum signal level detected from the image signal. The luminance controller changes the voltage difference in real-time according to image characteristics, allowing optimal luminance output for different image content while maintaining reduced power consumption overall.
Solution Approach 2:
The patent changes the parameter of potential difference between voltages based on the maximum signal level. By detecting the maximum signal level and adjusting the potential difference accordingly, the system optimizes the balance between power consumption and luminance output, ensuring adequate display quality while reducing overall power usage.
2Use of energy by stationary object
If the magnitude of current is reduced significantly, then power consumption is suppressed, but display quality deteriorates due to luminance decrease
Solution Approach 1:
The system dynamically adjusts the potential difference based on the maximum signal level detected from the image signal. This dynamic control ensures that display quality is maintained at appropriate levels while power consumption is reduced, as the voltage adjustment adapts to actual image requirements rather than using a fixed reduced value.
Solution Approach 2:
The luminance controller detects the maximum signal level from the image signal and uses this feedback to adjust the potential difference between voltages. This feedback mechanism ensures that display quality requirements are met while optimizing power consumption, as the system responds to actual image characteristics rather than using predetermined fixed values.
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 minimizes adverse effects on display quality by dynamically controlling the potential difference, allowing for reduced power consumption without substantial luminance loss, by setting thresholds based on image signal characteristics and viewer parameters.
Implementation Method 1
a current-driven self-luminescent element
Data Source
AI summary
A luminance controlling unit includes a luminance controller that controls luminance of a pixel array. The pixel array includes pixels each including a current-driven self-luminescent element. The luminescent controller sets, on the basis of an image signal corresponding to a frame image, a threshold that is directed to detection of a maximum signal level of the image signal, and performs dynamic control of a potential difference between a first voltage and a second voltage on the basis of the maximum signal level detected with reference to the set threshold. The first voltage is outputted from a first voltage source adjacent to an anode of the self-luminescent element, and the second voltage is outputted from a second voltage source adjacent to a cathode of the self-luminescent element.