CN104950515A - Display panel with short wave blue light restraining function - Google Patents
Display panel with short wave blue light restraining function Download PDFInfo
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- CN104950515A CN104950515A CN201410124634.8A CN201410124634A CN104950515A CN 104950515 A CN104950515 A CN 104950515A CN 201410124634 A CN201410124634 A CN 201410124634A CN 104950515 A CN104950515 A CN 104950515A
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- light
- blue light
- backlight module
- emitting diode
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Led Device Packages (AREA)
Abstract
The invention discloses a display panel with the short wave blue light restraining function. The display panel comprises a backlight module and a liquid crystal panel. The backlight module comprises a plurality of LEDs. The LEDs comprise blue light LED crystal particles which are used for generating blue light with the peak wavelength ranging from 455 nm to 475 nm when stimulated. The display panel can effectively reduce blue light with the wavelength smaller than 455 nm so as to protect the eyes, the display brightness of the display panel will not be weakened, and no color difference exists; in addition, the backlight module can also comprise a light filter or a light filter film so as to filter away blue light with the wavelength smaller than 455 nm, so that the blue light with the wavelength smaller than 455 nm can be reduced further, the eyes are protected better, and the weakened display brightness and color difference can be adjusted.
Description
Technical field
The present invention relates to a kind of display panel, particularly relate to a kind of display panel with suppression shortwave blue light.Blue wavelength range described in the present invention is between 380 ~ 490 nanometers (nanometer, nm), namely makes a general reference the blue light in traditional saying and purple light.More rigorous saying, wavelength is be called high energy royal purple light between 380 ~ 410 nm, and wavelength is be called shortwave blue light between 410 ~ 450 nm, and wavelength is be called long wave blue light between 450 ~ 490 nm.
Background technology
Light emitting diode (light-emitting diode, LED) has that thermal value is low, power consumption is little, the life-span is long, reaction velocity is fast, volume is little and the advantage such as not mercurous, becomes the artificial light source of main flow carbon reduction gradually.At present, white light LEDs arranges in pairs or groups yellow fluorescent powder the most generally with Blue LED Die (die), and technology is the most ripe and with low cost.The some blue light produced when utilizing Blue LED Die to be excited is for exciting yellow fluorescent powder to produce gold-tinted, and another part blue light produced with Blue LED Die is formed the white light of two wavelength by this gold-tinted.The Blue LED Die that existing white light LEDs many employings luminescence efficiency is higher, peak wavelength is 444 nm.Refer to Fig. 1, it is a kind of spectral distribution graph of existing white light LEDs.The spectral distribution of this white light LEDs has two spike P1 and P2 in wavelength 444 and 550 nm part, and wherein, the spike P1 that light intensity is stronger is produced primarily of the Blue LED Die of peak wavelength by 444 nm, and spike P2 then produced primarily of yellow fluorescent powder.
As everyone knows, can cause damage, may cause the cataractous generation of eyes under being chronically exposed to ultraviolet light to skin and eyes etc., therefore the product of existing many ultraviolet lights comes out.In recent years, medical research confirmed, is chronically exposed to wavelength and also can causes damage to eyes under the blue light of 380 ~ 490 nm, such as, cause eye retina macular diseases.Particularly at present white light LEDs is adopted widely, and the two wavelength white lights that white light LEDs produces belong to the stronger blue wave band of brightness, and Long-Time Service can cause damage to a certain degree to eyes.Therefore, there is many products about eyeshield and anti-blue light in recent years, such as, can be arranged at anti-blue light cover glass in display device or diaphragm, the anti-blue light glasses that maybe can wear for user etc.These anti-blue light products are all the functions being realized anti-blue light by the material of Absorbable rod or reflect blue.Refer to Fig. 2, it is a kind of performance diagram of existing ultraviolet light/blue light diaphragm.This kind of ultraviolet light/blue light diaphragm is for the average transmittance respectively about 10% and 37% of wavelength between the ultraviolet light of 280 ~ 320 nm and 320 ~ 380 nm; and for the average transmittance about 62% of wavelength between the blue light of 380 ~ 450 nm; in addition, for the average transmittance about 90% of the visible ray of wavelength 450 more than nm.So when display device adopts this ultraviolet light/blue light diaphragm, its display brightness because of each wave band transmittance all do not reach 100% while brightness can lower to some extent, and the different transmittance of different-waveband also can cause color error ratio problem to a certain degree.
Recently, disclose in the paper " Phototoxic Action Spectrum on a Retinal Pigment Epithelium Model of Age-Related Macular Degeneration Exposed to Sunlight Normalized Conditions " that the people such as Emilie Arnault deliver at the PLOS ONE periodical in August, 2013: after eyes are subject to light irradiation, amphiblestroid pigment epithelial layer can produce a kind of light reaction material, be called N-retinylidene-N-retinylethanolamine (A2E), and after continuing irradiation light a period of time when retina cell contains A2E, cell can start to occur that viability declines, necrosis and apoptosis, particularly wavelength is the highest between the injury power of blue light to retina cell of 415 ~ 455 nm, wherein, wavelength between the blue light of 415 ~ 455 nm be exactly the scope of above-mentioned defined shortwave blue light.
Summary of the invention
The object of this invention is to provide a kind of display panel with suppression shortwave blue light, effectively can reduce the blue light of wavelength 455 below nm.
For achieving the above object, the invention provides a kind of display panel with suppression shortwave blue light, it comprises backlight module and liquid crystal panel, and backlight module comprises a plurality of light emitting diode (light-emitting diode, LED).Each LED comprises Blue LED Die, and Blue LED Die is in order to produce the blue light of peak wavelength between 455 ~ 475 nm when being excited.
In an embodiment of the present invention, each LED also can comprise phosphor powder layer.Phosphor powder layer is arranged on around Blue LED Die, in order to produce when being excited at least one color of light to produce with the blue light produced with Blue LED Die required for light.
In an embodiment of the present invention, backlight module can be direct type backlight module or side-entering type backlight module.
In an embodiment of the present invention, backlight module can be direct type backlight module.Direct type backlight module also comprises reflector plate (reflector) and diffusion sheet (diffuser).Reflector plate is arranged on the below of a plurality of LED, in order to reflect the light that a plurality of LED produces.Diffusion sheet is arranged on the top of a plurality of LED, in order to evenly to spread the light that a plurality of LED produces and the light come from reflectors reflects.Liquid crystal panel is arranged on the top of diffusion sheet, in order to show image.
In an embodiment of the present invention, direct type backlight module also can comprise optical filter.Optical filter is arranged between a plurality of LED and diffusion sheet or between diffusion sheet and liquid crystal panel or the top of liquid crystal panel, in order to the blue light of filtering wavelength 455 below nm.
In an embodiment of the present invention, direct type backlight module also can comprise filter coating.Filter coating is arranged on each LED or on diffusion sheet or on liquid crystal panel, in order to the blue light of filtering wavelength 455 below nm.
In an embodiment of the present invention, backlight module can be side-entering type backlight module.Side-entering type backlight module also comprises light guide plate (light guide plate) and diffusion sheet.A plurality of LED is arranged on the side of light guide plate.The light produced when light guide plate is in order to be excited a plurality of LED guides and projects towards diffusion sheet direction.Diffusion sheet is arranged on the top of light guide plate, in order to evenly to spread the light from light guide plate injection.Liquid crystal panel is arranged on the top of diffusion sheet, in order to show image.
In an embodiment of the present invention, side-entering type backlight module also can comprise optical filter.Optical filter is arranged between a plurality of LED and the side of light guide plate or between light guide plate and diffusion sheet or between diffusion sheet and liquid crystal panel or the top of liquid crystal panel, in order to the blue light of filtering wavelength 455 below nm.
In an embodiment of the present invention, side-entering type backlight module also can comprise filter coating.On the side that filter coating is arranged on each LED or light guide plate is corresponding with a plurality of LED or in light guide plate and the corresponding one side of diffusion sheet or on diffusion sheet or on liquid crystal panel, in order to the blue light of filtering wavelength 455 below nm.
The technological means described in an above-mentioned embodiment can be applicable in another embodiment above-mentioned, to obtain a new embodiment, as long as these technological means are not conflicting.
By above-mentioned technological means; the present invention effectively can reduce the blue light of wavelength 455 below nm; avoid wavelength between the blue light of 415 ~ 455 nm to the injury of retina cell; to protect eyes; and do not need to adopt the material of Absorbable rod or reflect blue to realize anti-blue light function, so the display brightness brought by these materials can be avoided to lower and color error ratio problem.The present invention still can adopt the optical filter that is made up of the material of Absorbable rod or reflect blue or filter coating to carry out the blue light of filtering wavelength 455 below nm further, further reduce the blue light of wavelength 455 below nm, and can not to the too much stop of the wave band of wavelength 455 more than nm, so adjustable lower display brightness, also reduce color error ratio.
For allowing object of the present invention, feature and advantage that those of ordinary skill in the art can be made to be more readily understood, hereafter in conjunction with the embodiments, and accompanying drawing is coordinated to be described in detail as follows.
Accompanying drawing explanation
The following drawings only schematically illustrates the present invention and explains, not delimit the scope of the invention.
Fig. 1 is a kind of spectral distribution graph of existing white light LEDs.
Fig. 2 is a kind of performance diagram of existing ultraviolet light/blue light diaphragm.
Fig. 3 is the structural drawing of a kind of illustrative examples of the display panel of employing direct type backlight module of the present invention.
Fig. 4 is the structural drawing of a kind of illustrative examples of white light LEDs of the present invention.
Fig. 5 is the spectral distribution graph of a kind of illustrative examples of white light LEDs of the present invention.
Fig. 6 is the spectral distribution graph of the another kind of illustrative examples of white light LEDs of the present invention.
Fig. 7 is the structural drawing of a kind of illustrative examples of the display panel of employing side-entering type backlight module of the present invention.
Identifier declaration:
1 direct type backlight module
11、31 LED
111 pedestals
112 tanks
113 Blue LED Die
114 phosphor powder layers
114a fluorescent powder material
114b resin
115 metal lead wires
116 metallic pin
12,34,35 reflector plates
13,33 diffusion sheets
2 liquid crystal panels
3 side-entering type backlight modules
32 light guide plate
P1, P2, P3, P4 spike.
Embodiment
Present feature of the present invention for clear, each assembly in accompanying drawing is only signal and is not the profile according to material object and scale, and clipped known assemblies.In addition, for presenting the consistency illustrated the present invention, in different embodiments, same or analogous mark represents same or analogous assembly.Direction term mentioned in an embodiment such as: up, down, left, right, before and after etc., is only the direction with reference to accompanying drawing, and therefore, the direction term of use is used to illustrate, but not is used for limiting the present invention.
Refer to Fig. 3, it is the structural drawing of a kind of illustrative examples of the display panel of employing direct type backlight module of the present invention.The display panel of the present embodiment comprises direct type backlight module 1 and liquid crystal panel 2.Direct type backlight module 1 comprises a plurality of LED 11, reflector plate 12 and diffusion sheet 13.Reflector plate 12 is arranged on the below of a plurality of LED 11, in order to reflect the light that a plurality of LED 11 produces.Diffusion sheet 13 is arranged on the top of a plurality of LED 11, in order to evenly to spread the light that a plurality of LED 11 produces and the light reflected from reflector plate 12.Liquid crystal panel 2 is arranged on the top of diffusion sheet 13, in order to show image.
LED 11 is white light LEDs, and as shown in Figure 4, and the spectral distribution graph of its a kind of illustrative examples as shown in Figure 5 for the structural drawing of its a kind of illustrative examples.The white light LEDs 11 of the present embodiment comprises pedestal 111, pedestal 111 is arranged with tank 112, be provided with Blue LED Die 113 on bottom tank 112 and be filled with phosphor powder layer 114, wherein, phosphor powder layer 114 is that the resin 114b sclerosis of fluorescent powder material 114a mixing light-permeable forms, and fluorescent powder material 114a is yellow fluorescent powder.Blue LED Die 113 is connected to the metallic pin 116 being located at pedestal 111 side by metal lead wire 115.White light LEDs 11, by metallic pin 116 is welded to circuit board (not illustrating), makes Blue LED Die 113 be connected with the LED drive circuit on circuit board.When Blue LED Die 113 be subject to LED drive circuit power and be excited time, the blue light that peak wavelength is 460 nm can be produced.To the fluorescent powder material 114a of phosphor powder layer 114, excitated fluorescent powder material 114a produces gold-tinted to the blue light illumination of a part, the blue light of another part through resin 114b and while the yellow light mix that produces with fluorescent powder material 114a form the white light of two wavelength.
As shown in Figure 5, the spectral distribution of the white light LEDs 11 of the present embodiment has two spike P3 and P4 in wavelength 460 and 558 nm part, wherein, the spike P3 that light intensity is stronger is produced primarily of the Blue LED Die 113 that peak wavelength is 460 nm, and spike P4 then produced primarily of phosphor powder layer 114.Because the peak wavelength produced primarily of Blue LED Die 113 in the white light LEDs 11 of the present embodiment is displaced to 460 nm by existing 444nm; effectively can reduce the blue light of wavelength 455 below nm; particularly wavelength can reduce its injury to retina cell between the attenuating of the light intensity of the blue light of 415 ~ 455 nm; to protect eyes; and because do not need to adopt the material of Absorbable rod or reflect blue to realize anti-blue light function, so the display brightness brought by these materials can be avoided to lower and color error ratio problem.
Although the white light LEDs 11 of the present embodiment adopts peak wavelength to be the Blue LED Die 113 of 460 nm, but it is not intended to limiting the invention, such as, white light LEDs can change the Blue LED Die adopting peak wavelength arbitrary wavelength in 455 ~ 475 nm, or only adopts the Blue LED Die of peak wavelength arbitrary wavelength in 460 ~ 470 nm further.Again such as, white light LEDs can make blue-ray LED into, and this blue-ray LED adopts the Blue LED Die of peak wavelength arbitrary wavelength in 455 ~ 475 nm, or only adopts the Blue LED Die of peak wavelength arbitrary wavelength in 460 ~ 470 nm further.Again such as, fluorescent powder material is except yellow fluorescent powder, also can add the fluorescent powder (as ruddiness and/or green light fluorescent powder) of other color of light again, form composite phosphor material, this composite phosphor material is being subject to except producing gold-tinted, also producing other color of light (as ruddiness and/or green glow) after blue light illumination excites, to form required light with blue light, such as three or more the white light of wavelength or the light of other color.
In addition, the present invention also can adopt the optical filter that is made up of the material of Absorbable rod or reflect blue or filter coating to carry out the blue light of filtering wavelength 455 below nm further, to reduce the blue light of wavelength 455 below nm further, and because can not to the too much stop of the wave band of wavelength 455 more than nm, so adjustable lower display brightness, also reduce color error ratio.In one embodiment, direct type backlight module 1 also comprises one or a plurality of optical filter in order to filtering wavelength 455 below nm blue light, and each optical filter is arranged between a plurality of white light LEDs 11 as shown in Figure 3 and diffusion sheet 13 or between diffusion sheet 13 and the liquid crystal panel 2 or top of liquid crystal panel 2.
In another embodiment, direct type backlight module 1 also comprises one or a plurality of filter coating in order to filtering wavelength 455 below nm blue light, each filter coating is arranged on above the phosphor powder layer 114 of each white light LEDs 11 as shown in Figure 4, or is arranged on diffusion sheet 13 as shown in Figure 3 or on liquid crystal panel 2.Refer to Fig. 6, its be white light LEDs 11 as shown in Figure 4 phosphor powder layer 114 above be provided with the spectral distribution graph after filter coating.As shown in Figure 6, filter coating can reduce the blue light of wavelength 455 below nm further.
Refer to Fig. 7, it is the structural drawing of a kind of illustrative examples of the display panel of employing side-entering type backlight module of the present invention.The display panel of the present embodiment comprises side-entering type backlight module 3 and liquid crystal panel 2.Side-entering type backlight module 3 comprises a plurality of LED 31, light guide plate 32 and diffusion sheet 33.A plurality of LED 31 are arranged at the side of light guide plate 32.The light produced when light guide plate 32 is in order to be excited a plurality of LED 31 guides and projects towards diffusion sheet 33 direction.Diffusion sheet 33 is arranged on the top of light guide plate 32, in order to evenly to spread the light penetrated from light guide plate 32.Liquid crystal panel 2 is arranged on the top of diffusion sheet 33, in order to show image.In addition, side-entering type backlight module 3 also comprises reflector plate 34 and reflector plate 35.Reflector plate 34 is arranged on around a plurality of LED 31, in order to reflect the light that a plurality of LED 31 produces, makes the side of light guide plate 32 except receiving light that a plurality of LED 31 produces, also can receive the light reflected from reflector plate 34.Reflector plate 35 is arranged on the below of light guide plate 32, in order to be projected towards diffusion sheet 33 direction by the light reflection guided in light guide plate 32.
In the present embodiment, each LED 31 is white light LEDs 11 as shown in Figure 4.White light LEDs 31(and white light LEDs 11 due to the present embodiment) in the peak wavelength that produces primarily of Blue LED Die 113 be displaced to 460 nm by existing 444nm; effectively can reduce the blue light of wavelength 455 below nm; particularly wavelength can reduce its injury to retina cell between the attenuating of the light intensity of the blue light of 415 ~ 455 nm; to protect eyes; and because do not need to adopt the material of Absorbable rod or reflect blue to realize anti-blue light function, so the display brightness brought by these materials can be avoided to lower and color error ratio problem.
Although the white light LEDs 31(of the present embodiment and white light LEDs 11) adopt peak wavelength to be the Blue LED Die 113 of 460 nm, but it is not intended to limiting the invention, such as, white light LEDs can change the Blue LED Die adopting peak wavelength arbitrary wavelength in 455 ~ 475 nm, or only adopts the Blue LED Die of peak wavelength arbitrary wavelength in 460 ~ 470 nm further.Again such as, white light LEDs can make blue-ray LED into, and this blue-ray LED adopts the Blue LED Die of peak wavelength arbitrary wavelength in 455 ~ 475 nm, or only adopts the Blue LED Die of peak wavelength arbitrary wavelength in 460 ~ 470 nm further.
In addition, the present invention also can adopt the optical filter that is made up of the material of Absorbable rod or reflect blue or filter coating to carry out the blue light of filtering wavelength 455 below nm further, to reduce the blue light of wavelength 455 below nm further, and because can not to the too much stop of the wave band of wavelength 455 more than nm, so adjustable lower display brightness, also reduce color error ratio.In one embodiment, side-entering type backlight module 3 also comprises one or a plurality of optical filter in order to filtering wavelength 455 below nm blue light, and each optical filter is arranged between a plurality of LED 31 as shown in Figure 7 and the side of light guide plate 32 or between light guide plate 32 and diffusion sheet 33 or between diffusion sheet 33 and the liquid crystal panel 2 or top of liquid crystal panel 2.In another embodiment, side-entering type backlight module 3 also comprises one or a plurality of filter coating in order to filtering wavelength 455 below nm blue light, each filter coating is arranged on above the phosphor powder layer 114 of each white light LEDs 11 as shown in Figure 4, or is arranged on the light guide plate 32 as shown in Figure 7 side corresponding with a plurality of LED 31 or in one side that light guide plate 32 is corresponding with diffusion sheet 33 or on diffusion sheet 33 or on liquid crystal panel 2.
The foregoing is only embodiments of the invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. there is the display panel suppressing shortwave blue light, it is characterized in that, it comprises backlight module and liquid crystal panel, described backlight module comprises a plurality of light emitting diode, light emitting diode described in each comprises blue light-emitting diode crystal grain, and described blue light-emitting diode crystal grain is in order to produce the blue light of peak wavelength between 455 ~ 475 nanometers when being excited.
2. according to claim 1 have the display panel suppressing shortwave blue light, wherein, described light emitting diode also comprises phosphor powder layer, described phosphor powder layer is arranged on around described blue light-emitting diode crystal grain, described phosphor powder layer in order to produce when being excited at least one color of light to produce with the blue light produced with described blue light-emitting diode crystal grain required for light.
3. according to claim 1 and 2 have the display panel suppressing shortwave blue light, and wherein, described backlight module is direct type backlight module or side-entering type backlight module.
4. according to claim 1 and 2 have the display panel suppressing shortwave blue light, wherein, described backlight module is direct type backlight module, described direct type backlight module also comprises reflector plate and diffusion sheet, described reflector plate is arranged on the below of a plurality of described light emitting diode, in order to reflect the light that a plurality of described light emitting diode produces, described diffusion sheet is arranged on the top of a plurality of described light emitting diode, in order to evenly to spread the light that a plurality of described light emitting diode produces and the light come from described reflectors reflects, described liquid crystal panel is arranged on the top of described diffusion sheet, in order to show image.
5. according to claim 4 have the display panel suppressing shortwave blue light, wherein, described direct type backlight module also comprises optical filter, described optical filter is arranged between a plurality of described light emitting diode and described diffusion sheet or between described diffusion sheet and described liquid crystal panel or the top of described liquid crystal panel, in order to the blue light below filtering wavelength 455 nanometer.
6. according to claim 4 have the display panel suppressing shortwave blue light, wherein, described direct type backlight module also comprises filter coating, described filter coating is arranged on described light emitting diode or on described diffusion sheet or on described liquid crystal panel, in order to the blue light below filtering wavelength 455 nanometer.
7. according to claim 1 and 2 have the display panel suppressing shortwave blue light, wherein, described backlight module is side-entering type backlight module, described side-entering type backlight module also comprises light guide plate and diffusion sheet, a plurality of described light emitting diodes are arranged on the side of described light guide plate, the light produced when described light guide plate is in order to be excited a plurality of described light emitting diode guides towards the projection of described diffusion sheet direction, described diffusion sheet is arranged on the top of described light guide plate, in order to evenly to spread the light penetrated from described light guide plate, described liquid crystal panel is arranged on the top of described diffusion sheet, in order to show image.
8. according to claim 7 have the display panel suppressing shortwave blue light, wherein, described side-entering type backlight module also comprises optical filter, described optical filter is arranged between a plurality of described light emitting diode and the side of described light guide plate or between described light guide plate and described diffusion sheet or between described diffusion sheet and described liquid crystal panel or the top of described liquid crystal panel, in order to the blue light below filtering wavelength 455 nanometer.
9. according to claim 7 have the display panel suppressing shortwave blue light, wherein, described side-entering type backlight module also comprises filter coating, on the side that described filter coating is arranged on described light emitting diode or described light guide plate is corresponding with a plurality of described light emitting diode or in described light guide plate and the corresponding one side of described diffusion sheet or on described diffusion sheet or on described liquid crystal panel, in order to the blue light below filtering wavelength 455 nanometer.
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| CN201410124634.8A CN104950515A (en) | 2014-03-31 | 2014-03-31 | Display panel with short wave blue light restraining function |
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| CN201410124634.8A CN104950515A (en) | 2014-03-31 | 2014-03-31 | Display panel with short wave blue light restraining function |
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| CN201410124634.8A Pending CN104950515A (en) | 2014-03-31 | 2014-03-31 | Display panel with short wave blue light restraining function |
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