Backlight Luminance Auto-Adjustment via Photosensitive Feedback
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Solution Overview
Problem
Existing methods for testing Thin Film Transistor-Liquid Crystal Display (TFT-LCD) panels require manual adjustment of backlight source luminance, which is time-consuming and prone to errors, and do not efficiently manage power usage or device aging.
Innovation Solution
A system comprising a photosensitive element, amplification/conversion circuit, and control circuit that automatically adjusts the backlight source luminance by converting light signals into digital signals and comparing them to set values, allowing for automatic on/off functionality and power management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual adjustment of backlight source luminance is used, then device complexity is reduced, but measurement precision and productivity deteriorate due to time-consuming adjustments and human errors
Solution Approach 1:
The system employs a photosensitive element to detect the actual luminance of the backlight source and feeds this information back to the control circuit. The control circuit compares the detected luminance with the target luminance and automatically adjusts the backlight source accordingly, eliminating manual intervention and ensuring precise luminance control.
Solution Approach 2:
The system enables the backlight source to automatically adjust its own luminance based on real-time detection by the photosensitive element. The control circuit autonomously processes the detected signal and regulates the backlight source without requiring external manual adjustment, achieving self-service operation.
2Productivity
If manual adjustment of backlight source luminance is used, then device complexity is reduced, but productivity deteriorates due to time-consuming adjustments
Solution Approach 1:
The real-time feedback mechanism allows the system to continuously monitor and adjust backlight luminance during testing operations. This automatic regulation eliminates the need for operators to manually intervene for adjustments, significantly improving testing efficiency and productivity.
Solution Approach 2:
The system replaces manual mechanical adjustment with an automated electronic control system. The control circuit electronically regulates the backlight source based on electrical signals from the photosensitive element, substituting manual mechanical operations with automated electronic control to enhance productivity.
3Reliability
If continuous backlight source operation is maintained, then measurement precision is preserved, but energy consumption increases and device lifespan decreases
Solution Approach 1:
The system implements periodic operation of the backlight source by controlling it to operate only during necessary testing intervals. The control circuit manages the backlight source to be activated when testing is required and deactivated during idle periods, reducing energy consumption while maintaining luminance stability during active use.
Solution Approach 2:
The system ensures continuous useful action by maintaining backlight source operation only during actual testing when luminance stability is needed. By synchronizing backlight operation with testing activities, the system eliminates unnecessary continuous operation, thereby reducing energy consumption without compromising reliability during productive periods.
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 solution enhances the stability and accuracy of backlight source luminance adjustments, reduces manual intervention, saves energy, and prolongs device lifespan by automating the process.
Implementation Method 1
a photosensitive element mounted on the backlight source for converting a light signal into an electric signal
Data Source
AI summary
The present invention relates to a backlight-source-luminance auto-adjusting system including a backlight source, a photosensitive element being mounted on the backlight source for converting a light signal into an electric signal; an amplification/conversion circuit for amplifying a received analog signal and converting the analog signal into a digital signal; a control circuit for receiving a signal sent by the amplification/conversion circuit and adjusting the backlight source; and a device operating board. The present invention also relates to a backlight-source-luminance auto-adjusting method comprising: receiving a light signal of a backlight source and converting the light signal into an electric signal to be amplified and then converted into a digital signal; comparing a current value corresponding to the digital signal with a qualified current value corresponding to a set luminance of the backlight source; and controlling an output voltage of a control circuit and adjusting the backlight source, according to the comparison result. The backlight-source-luminance auto-adjusting system and method of the present invention can change the existing manually adjusting manner, improve the stability of backlight source luminance, realize automatic turning on and off of the backlight source, and slow aging of the device.