Laser Range Finder Two-Color OLED Display Switching
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Solution Overview
Problem
Current laser range finders struggle to display distance information effectively in varying environments, particularly in low-light conditions due to the limitations of ordinary transmissive LCD units, which result in poor contrast ratios and inability to function in dark environments.
Innovation Solution
A laser range finder that incorporates a monocular telescope with a combination of a roof half penta prism and a cemented prism, using a transmissive LCD in bright environments and an OLED LCD in dim environments, allowing for two-color switching display through a beam splitting prism group, enabling clear imaging of red, green, or yellow fonts on the focal plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an ordinary transmissive LCD unit is used for display, then the device structure is simple and cost is low, but the contrast ratio deteriorates in low-light environments making display impossible in dark conditions
Solution Approach 1:
The patent implements dynamic switching between two display systems (transmissive LCD and OLED LCD) based on lighting conditions. The switching mechanism allows the display system to adapt its characteristics dynamically - using transmissive LCD in bright conditions for simplicity and OLED LCD in dim conditions for high contrast, thereby resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The display system is designed with multi-functionality by incorporating both transmissive LCD and OLED LCD units that can operate in different lighting conditions. This universal design allows a single device to handle various lighting scenarios effectively, improving adaptability while managing complexity through integrated design.
2Illumination intensity
If a transmissive LCD unit is used, then the device is simple to manufacture, but the luminous flux transmission is insufficient in dark environments resulting in poor contrast ratio
Solution Approach 1:
The patent changes the fundamental parameters of the display system by switching from a transmissive LCD mechanism to an OLED LCD mechanism in low-light conditions. This parameter change enables sufficient luminous flux transmission and high contrast ratio in dark environments, while the manufacturing simplicity is maintained through the integrated switching design that selects the appropriate display type based on conditions.
3Adaptability or versatility
If the display contrast ratio is improved through higher luminous flux, then visibility in bright conditions is enhanced, but the device cannot function in dark environments where luminous flux is insufficient
Solution Approach 1:
The system dynamically adapts its display characteristics based on environmental lighting conditions. In bright conditions, it uses transmissive LCD with high luminous flux transmission for good visibility. In dark conditions, it switches to OLED LCD that maintains sufficient luminous flux and contrast ratio, ensuring reliable display across all environments. This dynamic adaptation resolves the contradiction between environmental adaptability and reliability in specific conditions.
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 enables effective two-color display in a variety of conditions, enhancing visibility and meeting application requirements across different lighting scenarios while maintaining a compact and lightweight design.
Implementation Method 1
the cemented surface is plated with a beam splitting film that reflects visible light and transmits OLED LCD light and laser light
Implementation Method 2
an OLED LCD imaging system includes an OLED LCD imaging unit and a display lens group
Implementation Method 3
laser light emitted by the laser light emitting system is emitted onto an object to be measured, and the reflected back laser light is received by the laser receiver
Implementation Method 4
the reflected back laser light is received by the laser receiver after passing through the objective lens, the roof half penta prism and the cemented prism
Data Source
AI summary
The present invention discloses a laser range finder for two-color switching display, comprising a monocular telescope, a laser light emitting system, a laser receiver and an OLED liquid crystal display (LCD) imaging system, wherein the monocular telescope comprises an objective lens, a roof half penta prism, a cemented prism, an eyepiece and an LCD unit; laser light emitted by the laser light emitting system is emitted onto an object to be measured, and the reflected back laser light is received by the laser receiver after passing through the objective lens, the roof half penta prism and the cemented prism; and light emitted by the OLED LCD imaging system is imaged on the focal plane of the eyepiece through the cemented prism. The present invention can achieve two-color display of the laser range finder, meeting the requirements for use in a variety of conditions.