Light Scattering LCD in Optical Lens Barrel for Dark Visibility
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Solution Overview
Problem
Existing optical lens barrels with LCD display screens face challenges in low light environments due to low transmittance rates and color interference, while OLED screens are expensive and sensitive to external light, necessitating a solution for high transmittance, colorless backgrounds, and cost-effectiveness.
Innovation Solution
An optical lens barrel with a light scattering LCD display screen and strategically positioned LED light sources that slantwise irradiate the display area, maintaining high transmittance and providing a colorless background, adjustable for visibility in varying light conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a TN display screen is used, then the display screen can show information, but the light transmittance rate is low and it cannot be used in dark environments
Solution Approach 1:
The patent changes the optical parameters of the display screen by using a highly-transmissive liquid crystal display screen with 90% light transmission rate, and introduces auxiliary lighting parameters through LED lamps to enable operation in dark environments while maintaining information display capability
2Illumination intensity
If a highly-transmissive liquid crystal display screen is used, then the light transmission rate is high (90%), but it cannot be used in dark environments
Solution Approach 1:
The patent merges the highly-transmissive liquid crystal display screen with monochromatic LED auxiliary lighting, combining the advantages of high light transmission with active illumination capability to solve the dark environment visibility problem while maintaining 90% light transmission rate
3Object-affected harmful factors
If a monochromatic LED lamp is added to improve dark environment display, then the display can be used in dark environments, but the background color becomes the same as the LED lamp color, reducing contrast and light transmission rate
Solution Approach 1:
The patent applies local quality by positioning LED lamps only at the edges or specific locations rather than illuminating the entire display area, and uses the light scattering layer to distribute light locally to only the necessary areas, preserving overall light transmission while enabling dark environment operation
4Object-affected harmful factors
If an OLED display screen is used, then the display can be used in dark environments with self-light emission, but the light transmittance rate is much less than highly-transmissive LCD and the cost is very high
Solution Approach 1:
The patent uses inexpensive TN or highly-transmissive LCD display screens combined with long-life LED auxiliary lighting instead of expensive OLED screens, achieving a cost-effective solution that provides dark environment visibility while maintaining high light transmission rate and long operational life
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 achieves high light transmittance rates, allows use in dark environments, maintains a transparent background, and is cost-effective, outperforming TN, highly-transmissive LCD, and OLED screens in terms of functionality and affordability.
Implementation Method 1
the LCD display screen is a light scattering LCD display screen
Implementation Method 2
the optical lens barrel is further internally provided with a light source
Implementation Method 3
an eye lens disposed at one end of the lens barrel body, an objective lens disposed at the other end of the lens barrel body
Data Source
AI summary
An optical lens barrel having a transmissive liquid crystal display function, liquid crystal display module and display screen, wherein the optical lens barrel comprises a lens barrel body, an eye lens disposed at one end of the lens barrel body, an objective lens disposed at the other end of the lens barrel body, and an LCD display screen disposed at a focal plane position of the optical lens barrel, wherein the LCD display screen is a light scattering LCD display screen; the optical lens barrel is further internally provided with a visible light source; the position of the light source should satisfy: the light source is disposed outside a visible area of the light scattering LCD display screen.