Laser Rangefinder Display Adaptation to Ambient Light
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Solution Overview
Problem
Traditional laser rangefinders face challenges in user observation due to display issues in low light conditions, as they typically display pure black numbers or use high-cost OLEDs that cannot automatically adjust to ambient light.
Innovation Solution
A laser rangefinder with a micro control unit, transmitter, receiver, light emitting module, and display unit, including a photosensitive element, light emitting element, and LED control board, which adjusts the display color based on light intensity detected by a photosensitive module, ensuring the displayed numbers are visible in varying light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pure black numbers are used for display, then manufacturing cost is reduced, but visibility in dark ambient light deteriorates
Solution Approach 1:
The display color dynamically changes based on ambient light intensity detected by the photosensitive element. In bright conditions, the display shows black numbers; in dark conditions, it automatically switches to red numbers, providing visibility adaptability without increasing manufacturing complexity
Solution Approach 2:
The invention changes the display parameter (color) from static to dynamic by introducing light intensity detection. The LED control board adjusts the display color parameter based on the photosensitive element's detection of ambient light levels, resolving the contradiction between cost and visibility
2Illumination intensity
If OLED is used for red number display, then visibility in dark conditions is improved, but manufacturing cost increases and automatic light detection capability is lost
Solution Approach 1:
The display system is segmented into multiple components: a photosensitive element for light detection, an LED control board for processing, and an LED display for output. This segmentation allows the system to achieve automatic light detection and red number display capabilities using simpler, more cost-effective components compared to using OLED
Solution Approach 2:
The photosensitive element acts as an intermediary between the ambient light environment and the display system. It detects light intensity and transmits this information to the LED control board, which then adjusts the display color accordingly, enabling automatic adaptation without expensive OLED technology
3Device complexity
If fixed display color is used, then device complexity is reduced, but adaptability to different lighting conditions deteriorates
Solution Approach 1:
The display system implements a feedback loop where the photosensitive element continuously monitors ambient light intensity and provides feedback to the LED control board. This feedback mechanism enables automatic adjustment of display color based on real-time lighting conditions, enhancing adaptability without significantly increasing device complexity
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 solution allows users to easily observe distance measurements regardless of ambient light levels by dynamically changing the display color according to the light intensity of the target, enhancing usability and reducing costs associated with OLEDs.
Implementation Method 1
the light emitting module comprises a photosensitive element, a light emitting element and an LED control board
Implementation Method 2
The laser beam is reflected by the object, and part of the laser beam returns to the laser ranging device
Implementation Method 3
the display unit includes a liquid crystal screen, a light board and a light guide plate arranged in order, wherein the light board is composed of an LED and a circuit board, and the light guide plate irradiates light on the liquid crystal screen
Data Source
AI summary
The present disclosure provides a laser rangefinder including a micro control unit, a power supply, a transmitter, a receiver, a light emitting module and a display unit, wherein the power supply, the transmitter, the receiver, the light emitting module and the display unit are electrically connected with the micro control unit, and the light emitting module includes a photosensitive element, a light emitting element and an LED control board.