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Optical Filters Using Melanin to Minimize Glare and Loss of Color Vision for Electronic Displays

A filter, glare technology, applied in the direction of filters, instruments, optics, etc., can solve problems such as no guidance

Active Publication Date: 2020-02-28
詹姆斯 M 加拉斯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the added blue light is filtered out, the glare will be reduced; however, blue light spans a wide wavelength spectrum, and as to which part of the spectrum the blue light should be selectively weighted in order to reduce it in transmission or filtering, such that Minimize glare, currently there is no guidance in the prior art

Method used

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  • Optical Filters Using Melanin to Minimize Glare and Loss of Color Vision for Electronic Displays
  • Optical Filters Using Melanin to Minimize Glare and Loss of Color Vision for Electronic Displays
  • Optical Filters Using Melanin to Minimize Glare and Loss of Color Vision for Electronic Displays

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0030] Example 1, preparing a film with melanin.

[0031] The thin plastic film of PET is composed as follows: 1.33 grams of hydrophobic melanin produced by Photoprotective Technologies, Inc (located in San Antonio, Southern Texas City, U.S.), and 10 grams of PET plastic pellets, which are added to 100 g of tetrahydrofuran and stirred for 24 hours. The solution was placed on a small glass slide and the solvent was allowed to evaporate in air. A film with a brown tinge was formed. The transmission spectrum of the film was recorded in the spectrometer and displayed in figure 2 middle.

[0032] Applicant notes that since the amount of ophthalmic lens pigment increases with age, the action spectrum for glare sensitivity may change with age. Therefore, the GRF will likely be age dependent - even for a particular filter.

example 2

[0033] Example 2, Calculation of GRF for the membrane of Example 1.

[0034] Table 2 of Applicant's document shows the complete calculation of the GRF for the film in Example 1. In this table, the column labeled 'Lambda' shows the wavelength of light; the column labeled 'P' shows the P of glare as a function of wavelength. λ Sensitivity; label 'S-InGaN' taken from image 3 The columns show the spectral distribution of the GaN white LED S λ ,; and the column labeled 'T-YM' shows the transmission spectrum t of the yellow melanin filter λ ( figure 2 ).

[0035] The numerator and denominator of the product in equation (1) can be determined by summing the terms in the appropriate columns. For example:

[0036] The term ∑S is obtained by multiplying the columns labeled 'S-InGaN' and 'P' to get the column labeled 'SP' and then summing the terms in column SP λ P λ . Similarly, ∑S is obtained by multiplying the column labeled 'T-YM' by the column labeled 'SP' and adding the p...

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PUM

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Abstract

Describes optical filters for electronic displays utilizing synthetic melanin to minimize glare and loss of color vision according to the action spectrum for glare sensitivity and the Farnsworth-Munsell 100 color test.

Description

technical field [0001] The present application relates to optical filters, and more particularly to thin plastic films that maximize vision protection, minimize glare, and preserve color perception when a person views images from electronic display screens. Background technique [0002] High energy visible (HEV) light from electronic displays adds uncomfortable glare. However, filters that reduce HEV light often result in a loss of color perception. [0003] The prior art teaches the use of melanin (U.S. Patent No. 5,112,883) and ophthalmic lens pigments derived from the oligomerization of 3-hydroxykynurenine (U.S. Patent No. 6,825,975) to reduce vision damage and glare. The prior art also involves the use of melanin in hydrophilic plastic films (US Application No. 20030092794). No prior art describes how to select a glare-reducing filter based on the transmission spectrum of the glare. If the added blue light is filtered out, the glare will be reduced; however, blue lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/20G02B5/22G02B1/04
CPCG02B1/04G02B5/20G02B5/22G02B5/223
Inventor 詹姆斯·M·加拉斯
Owner 詹姆斯 M 加拉斯