Segmented Display Unit for High Dynamic Range Perimetry
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Solution Overview
Problem
Existing eye examination devices face challenges with low achievable brightness levels, limited number of brightness levels, heaviness, and high energy consumption, which affect the accuracy and convenience of eye tests.
Innovation Solution
The proposed eye examination device incorporates a display unit with a specific configuration, including an illumination layer, brightness enhancing layer, polarization layers, and monochromatic LCD panels, along with an optical system and cooling system, designed to achieve a high dynamic range and brightness while being lightweight and energy-efficient.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional display technologies are used in eye examination devices, then the device structure is simple, but the achievable brightness levels are too low and the number of brightness levels is limited
Solution Approach 1:
The display unit is segmented into multiple functional layers including first and second LCD panels, multiple polarization layers, and brightness enhancing layers. Each layer performs a specific function to collectively achieve high brightness and wide dynamic range while maintaining manageable complexity through modular design
Solution Approach 2:
The patent transitions from conventional single-panel displays to a multi-layer stacked architecture, adding dimensional complexity in the vertical direction. This layered structure enables independent optimization of each layer's properties to achieve superior brightness characteristics
2Illumination intensity
If high brightness and wide dynamic range are achieved through multiple layers, then illumination intensity improves, but energy consumption increases
Solution Approach 1:
The patent employs monochromatic LCD panels instead of color panels, changing the optical parameters to reduce energy consumption. Monochromatic operation requires less energy while still achieving the required brightness levels through the stacked layer configuration and brightness enhancing materials
Solution Approach 2:
The patent uses achromatic screens that copy and enhance the brightness characteristics without requiring full color capabilities. This approach achieves the necessary brightness levels for eye examination while consuming less energy than full-color display systems
3Measurement precision
If conventional display systems are used, then device weight is lower, but the number of brightness levels is insufficient for accurate testing
Solution Approach 1:
The display unit is divided into multiple functional layers including first and second LCD panels, polarization layers, and brightness enhancing layers. This segmentation enables precise control over brightness levels (achieving 65536 levels) while distributing the weight across multiple lightweight components
Solution Approach 2:
The patent uses monochromatic LCD panels which provide sufficient brightness control precision for eye examination without the added weight of color display systems. The parameter change from color to monochromatic operation maintains measurement precision while reducing device weight
4Measurement precision
If high performance display components are used to achieve wide dynamic range, then measurement precision improves, but device complexity increases
Solution Approach 1:
The display unit is segmented into specialized layers each optimized for specific functions: LCD panels for modulation, polarization layers for light control, and brightness enhancing layers for intensity amplification. This segmentation achieves wide dynamic range (0 to 48 dB) while keeping each component relatively simple
Solution Approach 2:
The stacked layer structure serves multiple functions simultaneously: light modulation, polarization control, brightness enhancement, and thermal management. This multi-functionality reduces the need for separate components, thereby managing overall device complexity while achieving superior measurement precision
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 device achieves a high dynamic range of 0 to 48 dB and 65536 brightness levels, enabling accurate eye examinations with improved convenience and mobility, while reducing energy consumption and weight.
Implementation Method 1
the first liquid crystal modulation layer, the second polarization layer, the second liquid crystal modulation layer
Implementation Method 2
the first polarization layer, the second polarization layer, the third polarization layer
Implementation Method 3
a cooling system of the display unit
Data Source
AI summary
The aspects of the disclosed embodiments concerns a device designed for eyesight examination, which can be applied in medicine, in particular in ophthalmology. The device can be used for perimetry/visual field testing and also other parameters where tests are conducted by means of light stimuli displayed in front of the patient's eyes.