Display Brightness Control Using Panel Photovoltaic Sensing
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Solution Overview
Problem
Conventional display systems experience gradual brightness decay over time, requiring manual adjustments by users, which is inconvenient, and existing solutions that use sensors for automatic adjustment are costly.
Innovation Solution
An apparatus comprising an input unit, counter, and controller that adjusts the control signal level to maintain initial brightness without a sensor, using look-up tables to determine compensating parameters and adjust the brightness from decayed to initial levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a sensor is used to automatically detect brightness and adjust the display system, then the brightness can be automatically maintained, but the cost increases significantly
Solution Approach 1:
The patent extracts the brightness sensing function from a dedicated sensor and relocates it to the existing display panel itself. The display panel serves dual purposes: displaying images and sensing ambient light conditions through its photovoltaic properties, thereby eliminating the need for separate sensor components and reducing cost while maintaining automatic brightness adjustment capability
Solution Approach 2:
The display panel is designed to perform multiple functions simultaneously: it serves as both the image display component and the light sensing element. By utilizing the photovoltaic effect of the display panel materials, the system achieves ambient light detection without requiring additional specialized sensors, thus reducing overall system cost while maintaining automation
2Device complexity
If manual brightness adjustment is required to maintain initial brightness, then the system structure remains simple, but the ease of operation deteriorates
Solution Approach 1:
The display system performs automatic brightness adjustment by itself without requiring user intervention. The system uses the display panel's own photovoltaic properties to sense ambient light conditions and automatically adjusts the backlight or display parameters to maintain optimal brightness, thereby improving ease of operation while keeping the system structure relatively simple
Solution Approach 2:
The system establishes a feedback loop where the display panel continuously monitors ambient light conditions and automatically adjusts its brightness output accordingly. This closed-loop control mechanism ensures the display maintains appropriate brightness levels under varying environmental conditions without requiring manual user adjustment
Data Source
AI summary
In a display system, an inputted video sequence is displayed with an initial brightness at a first time and corresponding to a present control signal level and further displayed with a decayed brightness at a second time before adjustment. An apparatus, used for adjusting the brightness of the inputted video sequence, includes an input unit, a counter, a controller, and a brightness control unit. The input unit is used for inputting the present control signal level. The counter is used for counting time and outputting a notification signal at the second time. The controller is used for receiving the present control signal level and the notification signal and accordingly generating a present compensating parameter. The brightness control unit is used for receiving the present compensating parameter and generating an adjusted control signal level to adjust the brightness of the inputted video sequence from the decayed brightness to the initial brightness.