Optical Touch Panel Brightness Adjustment via Ambient Light Detection
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Solution Overview
Problem
Optical touch panels face inefficiencies due to fixed brightness levels, leading to energy wastage and reduced lifespan, as they do not adapt to varying ambient light conditions, and existing solutions like manual adjustment or additional light sensors are either cumbersome or costly.
Innovation Solution
An optical touch panel system that adjusts brightness based on ambient light levels using a microprocessor, optical transmitting and receiving devices, and predefined operation modes, including power saving and automatic calibration, to optimize energy usage and extend panel life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a fixed brightness level is used for the backlight source, then the display visibility is maintained under normal lighting conditions, but energy is wasted when ambient light levels are low or during non-business hours
Solution Approach 1:
The patent implements dynamic brightness adjustment by enabling the optical receiving devices to detect ambient light levels and automatically control the backlight source brightness accordingly. This transforms the static fixed-brightness system into a dynamic one that adapts to changing environmental conditions, reducing energy consumption during low-light periods while maintaining visibility when needed.
Solution Approach 2:
The system uses optical receiving devices to continuously monitor ambient light conditions and feeds this information back to the microprocessor, which then adjusts the backlight source brightness. This closed-loop feedback mechanism ensures the display maintains adequate visibility while automatically reducing power consumption when ambient light levels indicate lower display requirements.
2Illumination intensity
If the brightness level is increased to ensure visibility in high ambient light conditions, then the display remains visible, but the lifespan of the optical touch panel is shortened
Solution Approach 1:
The system dynamically adjusts backlight brightness based on real-time ambient light detection rather than maintaining a constantly high brightness level. This dynamic adaptation reduces cumulative stress on the optical components during periods when maximum brightness is not required, thereby extending the operational lifespan of the touch panel while ensuring visibility is maintained when high brightness is actually needed.
Solution Approach 2:
The patent changes the brightness parameter of the backlight source based on detected ambient light conditions. By adjusting this key parameter dynamically rather than maintaining it at a fixed high level, the system reduces unnecessary exposure of optical components to high-intensity operation, thereby extending component lifespan while preserving display visibility when required.
3Ease of operation
If manual brightness adjustment is provided, then users can control display brightness, but the operation becomes troublesome and users tend to set maximum brightness which wastes energy
Solution Approach 1:
The system performs automatic brightness adjustment without requiring user intervention. The optical receiving devices continuously monitor ambient light conditions and the microprocessor automatically controls the backlight source accordingly. This self-service approach eliminates the need for manual user operation while preventing energy waste by ensuring brightness is optimized based on actual environmental conditions rather than user convenience settings.
Solution Approach 2:
The automatic brightness control system uses feedback from optical sensors that continuously monitor ambient light levels. This feedback loop enables the system to automatically adjust brightness without user input, eliminating the troublesome manual adjustment process while optimizing energy consumption based on real-time environmental conditions.
4Use of energy by moving object
If additional light sensors are added to enable automatic brightness adjustment, then energy can be optimized, but manufacturing cost and assembly overhead increase
Solution Approach 1:
The patent makes the existing optical receiving devices, originally designed for touch detection, serve a dual function by enabling them to detect ambient light levels for brightness control. This multi-functionality approach eliminates the need for additional dedicated light sensors, thereby avoiding increased manufacturing costs and assembly overhead while still achieving automatic energy-optimized brightness adjustment.
Solution Approach 2:
The system merges the functions of touch detection and ambient light sensing into a single component set - the optical receiving devices. By combining these functions rather than using separate components, the patent avoids additional manufacturing costs and assembly steps while achieving both touch sensitivity and automatic brightness adjustment capabilities.
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 system dynamically adjusts brightness to match ambient conditions, reducing energy consumption and extending the lifespan of optical touch panels while maintaining adequate visibility.
Implementation Method 1
detecting, via the optical receiving devices, a current ambient light level on the display module
Data Source
AI summary
A method, device, and computer program product are provided for adjusting brightness of an optical touch panel. The optical touch panel comprises a microprocessor, a display module including a back light source, and an optical position detection device including optical transmitting devices and optical receiving devices. The method comprises detecting, via the optical receiving devices, a current ambient light level on the display module. The method further comprises generating, via the optical receiving devices, a current ambient light level signal indicative of the detected current ambient light level and transmitting the current ambient light level signal to the microprocessor. Furthermore, the method comprises adjusting, via the microprocessor, brightness of the back light source based on the current ambient light level signal.