CN104977636A - Filter adopting melanin minimized glare and color sense loss and applied to electronic display - Google Patents

Abstract

The invention describes a filter adopting synthetic melanin minimized glare and color sense loss and applied to an electronic display according to action spectrum and FM100 color test used for glare sensitivity.

Description

The melanin that utilizes for electronic console minimizes the light filter of dazzle and colour vision forfeiture

Technical field

The application relates to light filter, relates more specifically to thin plastic, and when a people it seems when the image of electronic display, this thin plastic maximizes vision protection, minimizes dazzle and protects color perception.

Background technology

Visible (HEV) light of high-energy from electronic display increases uncomfortable dazzle.But the light filter of reduction HEV light can cause the forfeiture to color perception usually.

Prior art teaching uses melanin (United States Patent (USP) the 5th, 112, No. 883) and oligomerisation reaction from 3 hydroxykynurenines (United States Patent (USP) the 6th, 825, No. 975) in extract eye lens pigment to reduce Sunglasses lenses sun clips to the infringement of eyesight and dazzle.Prior art also relates in hydrophilic plastic film, to use melanin (U. S. application number 20030092794).Description of the prior art is not had how to select to reduce the light filter of dazzle according to the transmitted spectrum (transmission spectrum) of dazzle.If filter the blue light of increase, dazzle will reduce; But, blue light spans wide wavelength spectrum (wide wavelengthspectrum), and about blue light being optionally weighted to which part of spectrum, to be reduced in transmission or in filtering, make dazzle reduce to minimum, do not instruct in currently available technology.

Summary of the invention

In the present invention, applicant describes " the dazzle minimizing factor " or " GRF (Glare ReductionFactor) ", and test to combine with well-known method grace Ellsworth-Meng Saier (Farnsworth-Munsell) 100 look and use this term for the first time, so that for melanin and eye lens pigment describe best transmitted spectrum, and therefore provide guidance for effectively reducing blue light.

Light filter of the present invention comprises: a) transparent substrate; And b) lightscreening agent, the dazzle that wherein said lightscreening agent has 1.5 or larger reduces the factor, and the increasing by a small margin in mistake in the test of FM100 look is not more than 10%.

Above-mentioned light filter, wherein transparent substrate is mylar.

Above-mentioned light filter, wherein lightscreening agent is melanin.

Above-mentioned light filter, wherein lightscreening agent is the polymerizate of 3 hydroxykynurenines.

Above-mentioned light filter, wherein lightscreening agent is bituminous matter.

Accompanying drawing explanation

Fig. 1 shows the action spectrum (action spectra) of the glare sensitivity for two targets.

Fig. 2 shows the transmitted spectrum of the film of the PET with yellow black element.

Fig. 3 shows the emission spectrum of White LED.

Fig. 4 show TES (as undefined-see definition) and 95% in the drawing of mean value.

Embodiment

Definition

1. the test of method grace Ellsworth-Meng Saier 100 colourity is the method for colour vision for measuring people, and it comprises 85 moveable color chess pieces (colorreference caps) with the leap visible spectrum of form and aspect gradual change altogether.By testing colour anomaly or its tendentiousness by color phase sequence color arrangement chess piece.

2.TES(total error score)。Total wrong score (TES) places the color chess piece of FM100 look test to form the accurate test of gradual change between two fixing chess pieces (anchor caps) to observer; Larger TES is larger for the quantity misplaced.

The application is defined for the physical characteristics of the optical filter of electronic display with the form of thin plastic, such as, this thin plastic quantizes its ability to reduce dazzle and to keep the consciousness to color.Dazzle reduces the factor for blue light being optionally weighted to which part of spectrum to be reduced provide guidance in transmission or in filtering.

3. melanin is defined as natural colouring matter, and at United States Patent (USP) the 5th, defines further in 112, No. 883, this patent content to be quoted and as a application's part at this.

4. United States Patent (USP) the 6th, 825, No. 975 polymerizates defined from 3 hydroxykynurenines, this patent content to be quoted and as a application's part at this.

One, dazzle reduces the factor

The invention describes once determine its transmitted spectrum and specify the spectral distribution of light source, quantize the method that dazzle reduces, this dazzle reduces can adopt light filter.Invention also describes product, be namely derived from the film of preceding method.This dazzle reduces the action spectrum for the glare sensitivity relevant to photophobia that factor GRF have employed the dependence wavelength of report recently.

Stirling Durham (Stringham), Fu Erde (Fuld) and Peter Wenzel (Wenzel) (J., Opt.Soc.Am.A/Vol.20, No.10/102003) provide the action spectrum (Fig. 1) for dazzle sensitivity, there is the susceptibility of growth in the HEV territory that this glare sensitivity shows at wavelength.

Applicant defines the average transmission T of the light that dazzle causes _g, utilize action spectrum P above _λwith the specific emission spectrum S of light source (being electronic display here) _λto this average transmission T _gweighting.

As follows:

$T_G=\mathrm{\Σ}{S}_{\mathrm{\λ}}{P}_{\mathrm{\λ}}{t}_{\mathrm{\λ}}/\mathrm{\Σ}{S}_{\mathrm{\λ}}{P}_{\mathrm{\λ}}---\left(1\right)$

Here t _λthe transmissivity of light filter in wavelength X.

Therefore, applicant advises that dazzle is reduced the factor to be defined as

GRF=1/T _G(2)

And utilize this formula as the guidance selecting to have the transmitted spectrum of low dazzle, and the dazzle assessing any given light filter reduce ability.

Example 1, prepares to have melanic film.

The thin plastic of PET is composed as follows: 1.33 grams by Photoprotective Technologies, the hydrophobicity melanin that Inc (being positioned at the San Antonio city of Texas, USA southern city) produces, and 10 grams of PET beads, these 10 grams of PET beads are joined 100 grams of tetrahydrofurans and stir 24 hours.Solution is placed on little glass sheet, and this solvent allows to evaporate in air ambient.Form the film with brown color.In spectrometer, record the transmitted spectrum of this film, and shown in fig. 2.

Applicant indicates, due to eye lens pigment quantity with advancing age, the action spectrum for glare sensitivity can change according to the age.Therefore, this GRF will probably rely on age-even for specific light filter.

Example 2, for the calculating of the GRF of the film of example 1.

The table 2 of applicant's file shows the complete calculating of the GRF for the film in embodiment 1.In the table, label is the wavelength that the row of ' Lambda ' show light; The row that label is ' P ' show the P of the dazzle as function of wavelength _λsusceptibility; Label shows the spectral distribution S of gallium nitride White LED for row that ' S-InGaN ' takes from Fig. 3 _λ; And label is the transmitted spectrum t that the row of ' T-YM ' show yellow black element light filter _λ(Fig. 2).

By adding the item in suitable row and can determine molecule and the denominator of the product in formula (1).Such as:

By being that ' S-InGaN ' to be multiplied with the row of ' P ' and to obtain the row that label is ' SP ' by label, then the item in row SP being added, thus obtaining a ∑ S _λp _λ.Equally, by being that the row of ' T-YM ' are multiplied by label for the row of ' SP ' by label, and be that product addition in the row of ' SPT ' obtains ∑ S by label _λp _λt _λ.By obtaining with SPT the transmission being used to the light of the action spectrum of the light that dazzle causes and the spectral weighting of light source divided by SP, and pass through T _gget acquisition GRF reciprocal.In this embodiment, the value of GRF is 1.77.

The value that this means to wear GRF be the people of the light filter of 1.77 when watching LED light source (there is the spectrum in Fig. 3) because dazzle feels that uncomfortable probability wants little 1.77 times.

The present invention is both for manufacturer is also for consumer provides the guidance selecting to reduce the filter coating of the electronic display of ability for having specific dazzle.

Two, color protection and the test of method grace Ellsworth-Meng Saier 100 look.

The test of method grace Ellsworth-Meng Saier 100 (FM100) colourity is made up of ' the color chess piece ' of 85 different colours, at the back side of the coloured one side of color chess piece in order from 1 to 85 numberings, when by they in order linear array time, colourity has gradual change-cross over whole visible spectrum, color from purple to blue-make when color chess piece is upset or do not placed in order, should be noted that power identification colors thus color chess piece be put into correct numerical order.

The expectation reducing dazzle from electronic display with reduce the needs of blue light and conflict, but this conflicts with protecting being contemplated to be of color.Especially electronic display needs to have enough brightness to read and to watch details, and also due to up to a million kinds of different colors may be had here.

Total wrong score (TES) is that observer is being arranged to color chess piece thus between two (anchorcaps), forming the accurate measurement of the gradual change of colourity; Higher TES is larger for the numeral misplaced.TES specification for this test is disclosed every now and then, comprises disclosed in PR Kinnear and A.Sahraie.Br JOphthalmol.Dec2002; Occur every year to the method grace Ellsworth-Meng Saier 100 colourity test of age from the normal viewer of the 30-70 of 5-22 and tens years old in 86 (12): 1408-1411, and be incorporated in this instructions in full with it here.

Based on the result in instructions of the present invention, applicant believes-for viewing computing machine-should 70% be not less than for the transmission of the Coloured film of the 555nm of photopic vision (phototopic vision), and should 60% be not less than for the projection of about 507nm of scotopia (scotopic vision); Meanwhile, dazzle reduces the factor should be at least 1.5 or larger, and, when watching the display screen of tool Coloured film, for any age group, the mistake of the small size increase on FM100-the be equivalent to small size increase in TES value-should 10% be not less than.

Table 1: simple computation dazzle reduces the factor

Lambda	LogP	P
			440	1.25	17.78279
450	1.15	14.12538
			460	1	10
470	1.15	14.12538
			480	1.05	11.22018
490	1	10
			500	1.05	11.22018
510	0.7	5.011872
			520	0.4	2.511886
530	0.3	1.995262
			540	0.2	1.584893
550	0.15	1.412538
			560	0.1	1.258925
570	0	1
			580	-0.1	0.794328
590	0.2	1.584893
			600	-0.3	0.501187
610	-0.45	0.354813
			620	-0.7	0.199526
630	-0.75	0.177828
			640	-0.8	0.158489

In table 1, Log glare sensitivity and glare sensitivity data are from Fig. 1 (theme JS).Lambda is wavelength; P is glare sensitivity.(from: Stringham, Fuld and Wenzel J., Opt.Soc.Am.A/Vol.20, No.10/102003).

Table 2: simple computation dazzle reduces the factor in Excel form

Table 2 is simple computation dazzle being reduced to the factor.For the white InGaN LED by the filtration of yellow black element to reduce dazzle.

Claims (5)

1. light filter comprises: a) transparent substrate; And b) lightscreening agent, the dazzle that wherein said lightscreening agent has 1.5 or larger reduces the factor, and the increasing by a small margin in mistake in the test of FM100 look is not more than 10%.

2. light filter according to claim 1, wherein said transparent substrate is mylar.

3. light filter according to claim 1, wherein said lightscreening agent is melanin.

4. light filter according to claim 1, wherein said lightscreening agent is the polymerizate of 3 hydroxykynurenines.

5. light filter according to claim 1, wherein said lightscreening agent is bituminous matter.