Color Filter Substrate for Light Detection
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Solution Overview
Problem
Existing display apparatuses require complex configurations and increased material types to accurately detect light of specific wavelengths, leading to higher fabrication costs and complexity.
Innovation Solution
A display apparatus utilizing color filters with specific spectral characteristics for image display and a detection filter formed from the same materials, positioned separately, to selectively pass and detect light of different wavelengths, including visible and invisible rays, with a simplified configuration and reduced material types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an IR filter is provided between optical sensors and the screen to enhance selective detection accuracy, then detection accuracy is improved, but the number of material types and fabrication steps increases leading to higher fabrication cost
Solution Approach 1:
The color filter substrate is designed to serve dual functions: displaying images through color filtering and detecting light wavelength information. By making the color filter substrate itself capable of wavelength detection, the patent eliminates the need for separate IR filters or additional detection filters, thereby maintaining detection accuracy while reducing fabrication complexity and material types.
Solution Approach 2:
The patent combines the image display function and light detection function into a single color filter substrate. The color filters are configured to both generate display colors and provide wavelength information for detection, merging what would traditionally be separate components into one integrated structure, thus reducing overall device complexity.
2Measurement precision
If multiple kinds of materials are used for IR filter and color filters, then selective detection accuracy is improved, but fabrication cost increases
Solution Approach 1:
The color filter substrate performs both display and detection functions using the same color filter materials. By designing the color filters with spectral characteristics that enable both image rendering and wavelength detection, the patent eliminates the need for additional IR filter materials, thereby reducing material costs while maintaining selective detection accuracy.
Solution Approach 2:
The patent uses the same color filter materials for both display and detection purposes. The color filters are configured to provide consistent spectral characteristics that serve dual functions, promoting material homogeneity and eliminating the need for multiple different filter materials, thus reducing fabrication costs.
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
Enables accurate detection of light of predetermined wavelengths with reduced fabrication complexity and material costs, while enhancing detection accuracy and suppressing noise and light leakage.
Implementation Method 1
color filters of different colors for passing light for displaying an image on a screen therethrough
Implementation Method 2
spectral characteristics that transmission factors thereof are higher in particular wavelength regions
Implementation Method 3
detection filter for passing light incident thereto from the screen therethrough
Implementation Method 4
optical sensor for detecting light incident from the screen through the detection filter
Data Source
AI summary
A display apparatus is provided which can detect light of a predetermined wavelength with a high degree of accuracy from within light incident from a screen by a simple configuration. The display apparatus includes a CF substrate (9) having a plurality of color filters (31) of different colors for passing light for displaying an image on the screen (55a) and an IR filter (33) provided in a region different from an arrangement region of the color filters of the different colors for passing light incident from the screen (55a), and a main sensor (19) provided on the rear side of the IR filter (33) for detecting light incident from the screen (55a) and passing through the IR filter (33). The IR filter (33) has a laminate of filter materials same as filter materials from which at least two or more ones of the color filters of the different colors are formed respectively.