CN104483778A - Light emitting device, backlight module and liquid crystal display device - Google Patents

Light emitting device, backlight module and liquid crystal display device Download PDF

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Publication number
CN104483778A
CN104483778A CN201410855442.4A CN201410855442A CN104483778A CN 104483778 A CN104483778 A CN 104483778A CN 201410855442 A CN201410855442 A CN 201410855442A CN 104483778 A CN104483778 A CN 104483778A
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Prior art keywords
light
fluorescent powder
white light
led luminescent
blooming piece
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CN201410855442.4A
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CN104483778B (en
Inventor
苏世虎
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Tianma Microelectronics Co Ltd
Shanghai AVIC Optoelectronics Co Ltd
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Tianma Microelectronics Co Ltd
Shanghai AVIC Optoelectronics Co Ltd
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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
    • G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
    • 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)
  • Engineering & Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Led Device Packages (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention discloses a light emitting device, a backlight module and a liquid crystal display device. The light emitting device adopts fluorescent powder excited luminescence and quantum spot luminescence at the same time to emit white light. Compared with a light emitting device only adopting quantum spot luminescence in the prior art, the brightness of the emitted light is higher, and high color saturation can be provided for the display device. The backlight module adopts fluorescent powder excited luminescence and quantum spot luminescence at the same time to emit white light. Compared with a backlight module only adopting quantum spot luminescence in the prior art, the brightness of the emitted light is higher, and high color saturation can be provided for the display device. The liquid crystal display device comprises the backlight module and has better display effect.

Description

Light-emitting device, backlight module and liquid crystal indicator
Technical field
The present invention relates to field of liquid crystal display, particularly a kind of light-emitting device, backlight module and liquid crystal indicator.
Background technology
Liquid crystal indicator is little with volume, lightweight, and the advantages such as Low emissivity are widely used in various field.
Liquid crystal indicator is made up of several parts such as display panels, backlight module and drive circuit boards usually.Wherein, backlight module is positioned at below display panels, to display panels output white light from bottom to top.Display panels has multiple liquid crystal light valve, by controlling the rotation of liquid crystal molecule, the light of permeate crystal panel can be regulated, meanwhile, matching with color membrane substrates and reaching the colored object shown.
Backlight module is ingredient main in liquid crystal indicator.Wherein, the important parameter such as brightness, color saturation of liquid crystal indicator is all relevant with the performance of backlight module.Those skilled in the art propose a kind of backlight module of arranging in pairs or groups with quantum film and light-emitting component, to improve the color saturation of liquid crystal indicator.
With reference to figure 1, show the schematic diagram of a kind of side entrance back module of prior art.Described backlight module comprises backboard framework, and is embedded in the opening of described backboard framework, the reflector plate 40 set gradually from bottom to top, light guide plate 30, quantum film 50 and multi-layer optical membrane 60; The sidewall of described opening is provided with LED light-emitting component 10, described LED light-emitting component 10 sends blue light, described blue light enters light guide plate 30 from side direction, and the direction of propagation of described blue light deflects, in the quantum film 50 that described blue light is entered in light guide plate 30 by light guide plate 30.Described backboard framework comprises backboard 20 and glue frame 70, and described LED light-emitting component 10 is bonded together by glue frame 70 and backboard 20.
Be dispersed with quantum dot in described quantum film 50, some blue light can be converted into ruddiness and green glow by described quantum dot, described ruddiness and green glow, and part is that the blue light transformed becomes white light, exports from described quantum film 50.The white light that this red, green, blue three Colored light mixing becomes, as the backlight of display panels, effectively can improve the saturation degree of liquid crystal indicator.
But some blue light is converted into the process of ruddiness and green glow by quantum film 50, can cause certain light intensity loss, and the white brightness making quantum film 50 export is lower, affects the performance of liquid crystal indicator.
Summary of the invention
The problem that the present invention solves is to provide a kind of light-emitting device, backlight module and liquid crystal indicator, while raising liquid crystal indicator color saturation, improves the brightness of liquid crystal indicator.
In order to solve the problem, the invention provides a kind of light-emitting device, comprising:
LED luminescent wafer;
The operator guards of coated described LED luminescent wafer, is provided with fluorescent powder in described operator guards;
Be arranged on the first blooming piece outside described operator guards, in described first blooming piece, be dispersed with quantum dot;
Described fluorescent powder can be subject to the part optical excitation that described LED luminescent wafer sends, thus ejecting white light; Another part light sent from described LED luminescent wafer is converted into white light after described first blooming piece of arrival.
Compared with prior art, in technical scheme of the present invention, the LED luminescent wafer in described light-emitting device is used for luminous, and described fluorescent powder can be subject to the part optical excitation that described LED luminescent wafer sends, thus ejecting white light; Another part light sent from described LED luminescent wafer, after described first blooming piece of arrival, is converted into white light by the mode of quantum dot light emitting.The light conversion ratio that described fluorescent powder transforms white light by optical excitation is higher than the light conversion ratio of quantum dot light emitting, that is, light incident fluorescence powder and first blooming piece respectively of same light intensity, the white light that fluorescent powder exports has higher brightness than the white light that the first blooming piece exports, therefore, light-emitting device of the present invention adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the light-emitting device only adopting quantum dot light emitting mode with prior art, the white brightness sent is higher, simultaneously owing to have employed first blooming piece with quantum dot, when making this light-emitting device serve as the backlight module of display device, display device is made to have higher color saturation.
The present invention also provides a kind of backlight module, comprising:
Light-emitting component, for luminescence;
First blooming piece, is dispersed with quantum dot in described first blooming piece, is converted into white light for the non-white light sent by described light-emitting component;
Optical module, is arranged between described light-emitting component and described first blooming piece, for the light of described light-emitting component is conducted to described first blooming piece;
The light path of described backlight module in described light-emitting component or between described light-emitting component to described first blooming piece is also provided with fluorescent powder, described fluorescent powder is used for sending white light by non-white light excites, and the white light that described fluorescent powder sends exports through the first blooming piece.
In backlight module provided by the invention, quantum dot is dispersed with in described first blooming piece, non-white light for being sent by described light-emitting component is converted into white light, light path in described light-emitting component or between described light-emitting component to described first blooming piece is also provided with fluorescent powder, described fluorescent powder is used for sending white light by non-white light excites, and the white light that described fluorescent powder sends exports through the first blooming piece.The light conversion ratio that described fluorescent powder transforms white light by optical excitation is higher than the light conversion ratio of quantum dot light emitting, that is, light incident fluorescence powder and first blooming piece respectively of same light intensity, that is, non-white light incident fluorescence powder and first blooming piece respectively of same light intensity, the white light that fluorescent powder exports has higher brightness than the white light that the first blooming piece exports, therefore, backlight module of the present invention adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the backlight module only adopting quantum dot light emitting mode with prior art, the white brightness sent is higher, display device can be made also to have higher color saturation simultaneously.
The present invention also provides a kind of liquid crystal indicator, the display panels comprising backlight module provided by the invention and be positioned on described backlight module.Because backlight module of the present invention and prior art only adopt compared with the backlight module of quantum dot light emitting mode, the white brightness sent is higher, also have higher color saturation, therefore liquid crystal indicator of the present invention has the advantage of high color saturation and high brightness concurrently simultaneously.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of prior art backlight module;
Fig. 2 is the schematic diagram of light-emitting device first embodiment of the present invention
Fig. 3 is the schematic diagram of light-emitting component in light-emitting device shown in Fig. 2;
Fig. 4 is the schematic diagram of light-emitting device second embodiment of the present invention;
Fig. 5 is the schematic diagram of light-emitting component in light-emitting device of the present invention 3rd embodiment;
Fig. 6 is the schematic diagram of light-emitting component in light-emitting device of the present invention 4th embodiment;
Fig. 7 is the schematic diagram of light-emitting component in light-emitting device of the present invention 5th embodiment;
Fig. 8 is the schematic diagram of light-emitting component in light-emitting device of the present invention 6th embodiment;
Fig. 9, Figure 10 are the schematic diagram of backlight module first embodiment of the present invention;
Figure 11, Figure 12 are the schematic diagram of backlight module second embodiment of the present invention;
Figure 13 is the cut-open view of backlight module of the present invention 3rd embodiment;
Figure 14 is the cut-open view of backlight module of the present invention 4th embodiment;
Figure 15 is the cut-open view of backlight module of the present invention 5th embodiment;
Figure 16 is the cut-open view of backlight module of the present invention 6th embodiment;
Figure 17 is the cut-open view of backlight module of the present invention 7th embodiment;
Figure 18 is the cut-open view of backlight module of the present invention 8th embodiment.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Described by background technology, although adopt the backlight module of quantum film can improve the color saturation of liquid crystal indicator in prior art, display brightness can be made poor.
For the problems referred to above, in the embodiment of the present invention, provide a kind of light-emitting device, backlight module and liquid crystal indicator, while raising liquid crystal indicator color saturation, improve the brightness of liquid crystal indicator.
In light-emitting device of the present invention, LED luminescent wafer is used for luminous, and described fluorescent powder can be subject to the part optical excitation that described LED luminescent wafer sends, thus ejecting white light; Another part light sent from described LED luminescent wafer, after described first blooming piece of arrival, is converted into white light by the mode of quantum dot light emitting.The light conversion ratio that described fluorescent powder transforms white light by optical excitation is higher than the light conversion ratio of quantum dot light emitting, that is, light incident fluorescence powder and first blooming piece respectively of same light intensity, that is, light incident fluorescence powder and first blooming piece respectively of same light intensity, the white light that fluorescent powder exports has higher brightness than the white light that the first blooming piece exports, therefore, light-emitting device of the present invention adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the light-emitting device only adopting quantum dot light emitting mode with prior art, the white brightness sent is higher, and when serving as the backlight module of display device with this light-emitting device, display device can be made to have higher color saturation.
Below in conjunction with specific embodiment, technical scheme of the present invention is described further.Fig. 2 shows the schematic diagram of light-emitting device first embodiment of the present invention, and in a first embodiment, described light-emitting device comprises the schematic diagram that light-emitting component 100 and the first blooming piece 200, Fig. 3 are light-emitting component 100 in Fig. 2.
In conjunction with reference to figure 2, Fig. 3, particularly, the present embodiment light-emitting device comprises:
LED luminescent wafer 101, for luminescence.
The operator guards of coated described LED luminescent wafer 101, is provided with fluorescent powder in described operator guards.Described light-emitting component 100 comprises described LED luminescent wafer 101 and operator guards.
Be arranged on the first blooming piece 200 outside described operator guards, in described first blooming piece 200, be dispersed with quantum dot 201.
In the present embodiment, described LED luminescent wafer 101 has exiting surface G1, and described first blooming piece 200 is arranged on the side of described LED luminescent wafer 101 exiting surface, and in the light path of the light sent at described LED luminescent wafer 101.
In the present embodiment, described LED luminescent wafer 101 sends blue light, and described fluorescent powder comprises the one in yellow fluorescent powder, yellow red mixed fluorescent powder or red green mixed fluorescent powder.But the present invention is not restricted this, optionally, in other embodiments, described LED luminescent wafer 101 can also send ultraviolet light.
Continue with reference to figure 3, in the present embodiment, described operator guards comprises:
The protective clear layer 102 of coated described LED luminescent wafer 101 exiting surface;
Housing 104, described protective clear layer 102 and LED luminescent wafer 101 are embedded in described housing 104, and described housing 104 exposes described protective clear layer 102.
In the present embodiment, described protective clear layer 102 comprises central area 1021 and the neighboring area 1022 around described central area, and described fluorescent powder is distributed in described neighboring area 1022.
Continue with reference to figure 3, described fluorescent powder can be subject to the some blue light 010 that described LED luminescent wafer 101 sends and excite, thus ejecting white light 030, that is, some blue light 010 is converted into white light by described fluorescent powder.Another part blue light 010 sent from described LED luminescent wafer 101 by after protective clear layer 102, still with blue light 010 outgoing.
Optionally, the material of described protective clear layer 102 is transparent resin.
It should be noted that; in other embodiments, when the light that described LED luminescent wafer 101 sends is other non-white light such as ultraviolet light, the fluorescent powder of other types can also be set in operator guards; make part non-white light be converted into white light, the present invention does not limit this.
Also it should be noted that, the present invention does not also limit the position arranging fluorescent powder in described operator guards, and in other embodiments, described fluorescent powder can also be arranged on other positions in described operator guards.
In conjunction with referring to figs. 2 and 3, particularly, because described LED luminescent wafer 101 has exiting surface G1, described first blooming piece 200 is arranged on the side of described LED luminescent wafer 101 exiting surface G1, and in the light path of the light sent at described LED luminescent wafer 101.
In the neighboring area 1022 of described protective clear layer 102, described fluorescent powder excites and sends white light 030 by some blue light 010, after the white light 030 sent from neighboring area 1022 arrives described first blooming piece 200, still exports with white light 030.
In the central area 1021 of protective clear layer 102, do not arrange fluorescent powder, another part blue light 010 sent from described LED luminescent wafer 101, by being still blue light behind central area 1021, is converted into white light 030 after described first blooming piece 200 of arrival.
Particularly, the quantum dot 201 that described first blooming piece 200 disperses, can be converted into ruddiness and green glow by some blue light 010, described ruddiness and green glow, and part is that the blue light 010 transformed is mixed into white light 030, exports from described first blooming piece 200.The white light 030 that this red, green, blue three Colored light mixing becomes, as the backlight of liquid crystal indicator, effectively can improve the saturation degree of liquid crystal indicator.
The light conversion ratio that described fluorescent powder transforms white light by optical excitation is higher than the light conversion ratio of quantum dot light emitting, that is, blue light 010 incident fluorescence powder and first blooming piece 200 respectively of same light intensity, the white light 030 that white light 030 to the first blooming piece that fluorescent powder exports exports has higher brightness, therefore, the present embodiment light-emitting device adopts fluorescent powder stimulated luminescence and the luminous two kinds of modes of quantum dot 201 to send white light 030 simultaneously, compared with the light-emitting device only adopting quantum dot mode with prior art, white light 030 brightness sent is higher, and when serving as the backlight module of display device with this light-emitting device, display device can be made to have higher color saturation.
It should be noted that; it is that to transform blue light be that the light conversion ratio of white light is higher for the more described quantum dot of light conversion ratio 201 of white light that described fluorescent powder transforms blue light; therefore; in the present embodiment; the area ratio that central area 1021 and neighboring area 1022 account for protective clear layer 102 exiting surface respectively can be changed; adjustment is converted into white light blue light luminous flux by described fluorescent powder accounts for the blue light luminous flux being converted into white light by quantum dot 201 ratio that described LED luminescent wafer 101 sends the total light flux of blue light respectively, and then the white brightness regulating the present embodiment light-emitting device to send.When the blue light luminous flux being converted into white light by described fluorescent powder account for ratio that described LED luminescent wafer 101 sends the total light flux of blue light larger time, the white brightness that the present embodiment light-emitting device sends is higher.
In the present embodiment, when to account for ratio that described LED luminescent wafer 101 sends the total light flux of blue light be 50% to the blue light luminous flux being converted into white light by described fluorescent powder, compared with the light-emitting device only adopting quantum dot light emitting mode with prior art, the brightness that the present embodiment light-emitting device sends white light can promote 51.61%.
It should be noted that, in the present embodiment, the exiting surface G1 of described first blooming piece 200 and described LED luminescent wafer 101 is oppositely arranged.Therefore the present embodiment light-emitting device can be applied to down straight aphototropism mode set.
It should be noted that, in the present embodiment, described operator guards is also provided with electrode 103, for powering for described LED luminescent wafer 101.
It should be noted that; Fig. 3 is the cut-open view of light-emitting component 100; the shape of not shown light-emitting component 100 upper surface; in light-emitting component of the present invention; the surface that described housing 104 exposes described protective clear layer 102 is the first upper surface G2; first upper surface G2 of described housing 104 can be the arbitrary shape such as rectangle, circle; the surface that described protective clear layer 102 deviates from described LED luminescent wafer 101 is the second upper surface G3; described second upper surface G3 can be the arbitrary shape such as rectangle, circle, and the present invention does not all limit this.
Also it should be noted that, in other embodiments, when the light that described LED luminescent wafer 101 sends is ultraviolet light, it is that to transform ultraviolet light be that the light conversion ratio of white light is higher equally for the more described quantum dot of light conversion ratio 201 of white light that described fluorescent powder transforms ultraviolet light, therefore, compared with the light-emitting device only adopting quantum dot mode with prior art, the white brightness that light-emitting device of the present invention sends is higher.
With reference to figure 4, show the schematic diagram of light-emitting device second embodiment of the present invention.The present embodiment is roughly the same with the technical scheme of the first embodiment, and the present embodiment part that is basically the same as those in the first embodiment repeats no more.Be that with the difference of the first embodiment there is between described first blooming piece 200 and the exiting surface G1 of described LED luminescent wafer 101 angle of 90 degree.Between described light-emitting component 100 and the first blooming piece 200, be provided with light-guide device 011, described light-guide device 011 can make the light generation optical path-deflecting by light-guide device 011.
The blue light 010 that described light-emitting component 100 sends and white light 030 by after described light-guide device 011, can be vertical enter described first blooming piece 200, therefore the present embodiment light-emitting device can be applied to side entrance back module.
With reference to figure 5, show the schematic diagram of light-emitting component in light-emitting device of the present invention 3rd embodiment.The present embodiment is roughly the same with the technical scheme of the first embodiment; the present embodiment part that is basically the same as those in the first embodiment repeats no more; be with the difference of the first embodiment; in the present embodiment; in light-emitting component; described protective clear layer 102 comprises central area 1021 and the neighboring area 1022 around described central area, and described fluorescent powder is distributed in described central area 1021.The benefit that described fluorescent powder is distributed in described central area 1021 is; described fluorescent powder excites the white light 030 sent to comprise central area 1021 from described protective clear layer 102 by some blue light 010 and outputs on described first blooming piece, is more conducive to the brightness of the white light that raising first blooming piece exports.
With reference to figure 6, show the schematic diagram of light-emitting component in light-emitting device of the present invention 4th embodiment.The present embodiment is roughly the same with the technical scheme of the first embodiment; the present embodiment part that is basically the same as those in the first embodiment repeats no more; be with the difference of the first embodiment; in the present embodiment; in light-emitting component; described fluorescent powder is uniformly distributed in described protective clear layer 102, and the fluorescent powder content in described protective clear layer 102 is below first threshold.
Particularly; when the content of described fluorescent powder in described protective clear layer 102 is less; some blue light 010 excitated fluorescent powder and send white light 030; another part blue light 010 can not excitated fluorescent powder; but still export through protective clear layer 102 with blue light, described another part blue light 010 is converted into white light by the first blooming piece.
When the content of fluorescent powder in described protective clear layer 102 is greater than first threshold; whole blue lights that LED luminescent wafer 101 sends (account for that LED luminescent wafer 101 sends blue light total light flux more than 99%; all the other can be ignored) excitated fluorescent powder sends white light, and whole blue lights that LED luminescent wafer 101 is sent are converted into white light.Therefore; in the present embodiment, the fluorescent powder content in described protective clear layer 102, below first threshold, makes some blue light 010 excitated fluorescent powder and sends white light 030; another part blue light 010 can not excitated fluorescent powder, but still exports through protective clear layer 102 with blue light 010.
It should be noted that, the light intensity that described first threshold and described protective clear layer 102 shape, volume and LED luminescent wafer 101 send blue light all has relation, and the occurrence of described first threshold can obtain by experiment, and the present invention is in this no longer any restriction.
In the present embodiment; can also by changing the fluorescent powder content in described protective clear layer 102; the luminous flux regulating the luminous flux of described fluorescent powder conversion blue light and quantum dot 201 to transform blue light accounts for the ratio that described LED luminescent wafer 101 sends the total light flux of blue light respectively, and then the white brightness regulating the present embodiment light-emitting device to send.
With reference to figure 7, show the schematic diagram of light-emitting component in light-emitting device of the present invention 5th embodiment.The present embodiment is roughly the same with the technical scheme of the first embodiment; the present embodiment part that is basically the same as those in the first embodiment repeats no more; be with the difference of the first embodiment; in the present embodiment; in light-emitting component; the surface that described protective clear layer 102 deviates from described LED luminescent wafer 101 is the second upper surface G3; described second upper surface G3 is provided with the second fluoresent coating 105; described fluorescent powder is distributed in described second fluoresent coating 105, does not arrange fluorescent powder in described protective clear layer 102.
Described second fluoresent coating 105 is converted into white light 030 for the some blue light 010 sent by described LED luminescent wafer 101, and another part blue light 010, through described second fluoresent coating 105, still enters the first blooming piece with blue light 010.
Particularly, some blue light 010 excitated fluorescent powder and send white light 030, another part blue light 010 can not excitated fluorescent powder, but still exports through the second fluoresent coating 105 with blue light 010, and described another part blue light 010 is converted into white light by the first blooming piece.Change into the blue light 010 of white light 030 relevant with fluorescent powder content in the second fluoresent coating 105 with the ratio of the luminous flux of unconverted blue light 010.
In the present embodiment, described second fluoresent coating 105 can adopt the modes such as coating to be formed in the second upper surface G3 of described protective clear layer 102.Such as fluorescent powder is distributed in organic material, described organic material is coated on organic material and solidifies, form the second fluoresent coating 105.Therefore, the manufacture craft of the present embodiment light-emitting device is more simple, and cost is lower.
With reference to figure 8, show the schematic diagram of light-emitting device of the present invention 6th embodiment.The present embodiment is roughly the same with the technical scheme of the first embodiment; the present embodiment part that is basically the same as those in the first embodiment repeats no more; be with the difference of the first embodiment; in the present embodiment; in light-emitting component; the surface that described housing 104 exposes described protective clear layer 102 is the first upper surface G2, shows G2 face and be provided with the first fluoresent coating 106 on described first, and described fluorescent powder is distributed in described first fluoresent coating 106.
In the present embodiment, in described protective clear layer 102, fluorescent powder is not set, is converted into white light from the blue light 010 of protective clear layer 102 outgoing by the first blooming piece.
In the present embodiment; described light-emitting device is used in optical transport environment; such as; when described light-emitting device is arranged in backlight module; described light-emitting component is the light-emitting component in backlight module; described first blooming piece is the first blooming piece in backlight module; described backlight module comprises the unitized construction of backboard, optical module, multiple blooming piece composition; projection or reflection is there is in each position of unitized construction, described unitized construction and optical transport environment from the blue light 010 of protective clear layer 102 outgoing.
The some blue light 010 that described light-emitting component can send by described optical transport environment reflexes on described operator guards.Because described fluorescent powder is distributed in the first fluoresent coating 106 on described first upper surface G2, described first fluoresent coating 106 can receive the some blue light 020 returned through described optical transport Ambient, and the some blue light 020 be reflected back described in making is converted into white light 030.
Therefore in the present embodiment, the some blue light 020 that described optical transport Ambient returns reuses by described first fluoresent coating 106, make it be converted into white light 030 and export through the first blooming piece, increasing the light utilization efficiency of described light-emitting device, effectively improve the brightness of light-emitting device.
The present invention also provides a kind of backlight module.In backlight module provided by the invention, quantum dot is dispersed with in described first blooming piece, non-white light for being sent by described light-emitting component is converted into white light, light path in described light-emitting component or between described light-emitting component to described first blooming piece is also provided with fluorescent powder, described fluorescent powder is used for sending white light by non-white light excites, and the white light that described fluorescent powder sends exports through the first blooming piece.With the first blooming piece by being dispersed with quantum dot, non-white light part being entered the first blooming piece is converted into white light and compares, described fluorescent powder is by optical excitation thus the non-white light that the white light sent enters fluorescent powder relatively has higher light conversion ratio, that is, non-white light incident fluorescence powder and first blooming piece respectively of same light intensity, the white light that fluorescent powder exports has higher brightness than the white light that the first blooming piece exports, therefore, backlight module of the present invention adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the backlight module only adopting quantum dot light emitting mode with prior art, the white brightness sent is higher, display device can be made also to have higher color saturation simultaneously.
Fig. 9 shows the cross-sectional schematic of backlight module first embodiment of the present invention, and Figure 10 is the partial top view (visual angle along arrow A in Fig. 91 direction from up to down) of backlight module in Fig. 9.With reference to figure 9, Figure 10, backlight module first embodiment of the present invention is described.
The present embodiment backlight module comprises:
Light-emitting component, for luminescence.Particularly, in the present embodiment, described light-emitting component comprises blue light emitting element 901 and white light emitting element 902.Described blue light emitting element 901 and white light emitting element 902 include LED luminescent wafer (not shown), and described LED luminescent wafer sends blue light.Described white light emitting element 902 is provided with fluorescent powder, and described fluorescent powder can make the blue light that in described white light emitting element, LED luminescent wafer sends be converted into white light.Do not arrange fluorescent powder in described blue light emitting element 901, therefore described blue light emitting element 901 sends blue light.
It should be noted that, in the present embodiment, described fluorescent powder can be hard to bear blue-light excited and send white light, and described fluorescent powder comprises yellow fluorescent powder, yellow red mixed fluorescent powder or red green mixed fluorescent powder.But the present invention does not limit this, in other embodiments, described LED luminescent wafer can also send ultraviolet light, and described fluorescent powder can also be chosen the hard to bear ultraviolet excitation of energy and send other kind fluorescent powder of white light.
Also it should be noted that, in the present embodiment, whole blue lights that in described white light emitting element, LED luminescent wafer sends are converted into white light.
Continue with reference to figure 9, the present embodiment backlight module also comprises the first blooming piece 600, is dispersed with quantum dot, is converted into white light for the non-white light sent by described light-emitting component in described first blooming piece 600.In the present embodiment, the blue light that blue light emitting element 901 sends is converted into white light by described first blooming piece 600.Particularly, the principle of quantum dot light emitting mode is: the some blue light that blue light emitting element 901 sends can be converted into ruddiness and green glow by described quantum dot, described ruddiness and green glow, and part is that the blue light transformed becomes white light, exports from described first blooming piece 600.
In the present embodiment, the white light that described white light emitting element 902 sends is the white light that described fluorescent powder sends, and the white light that described white light emitting element 902 sends exports through the first blooming piece 600.Therefore, the present embodiment backlight module can send white light by fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes simultaneously.
Fluorescent powder stimulated luminescence has higher light conversion ratio than quantum dot light emitting, that is, blue light incident fluorescence powder and first blooming piece 600 respectively of same light intensity, the white light that the white light that fluorescent powder exports exports than the first blooming piece 600 has higher brightness, therefore, the present embodiment backlight module adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the backlight module only adopting quantum dot light emitting mode with prior art, the white brightness sent is higher, can also provide higher color saturation for display device simultaneously.The present embodiment backlight module is applied in liquid crystal indicator, effectively can improve brightness and the color saturation of liquid crystal indicator, thus improves display effect.
Continue with reference to figure 9, the present embodiment backlight module also comprises:
Optical module, is arranged between described light-emitting component 901 (902) and described first blooming piece 600, for the light of described light-emitting component being conducted to described first blooming piece 600.
Backboard framework, described backboard framework comprises backboard 300 and frame glue 301, and described first blooming piece 600 and optical module are embedded in the opening of described backboard framework, and described first blooming piece 600 is positioned on described optical module.
Particularly, in the present embodiment, described backlight module is side entrance back module, described blue light emitting element 901 and white light emitting element 902 are positioned on the sidewall of described opening, described optical module comprises the light guide plate 500 being covered in open bottom, the light change direction that described light guide plate 500 sends for making described blue light emitting element 901 and white light emitting element 902, to enter in the first blooming piece 600 from described open bottom direction upwards.
With reference to the partial top view that Figure 10, Figure 10 are backlight module in Fig. 9.Described blue light emitting element 901 and white light emitting element 902 are in the alternately arrangement of described opening sidewalls.Such benefit is, described blue light emitting element 901 and white light emitting element 902 in described opening sidewalls arrangement evenly, make to be transmitted to blue light in the first blooming piece 600 and white light is evenly distributed through light guide plate 500.When the brightness that the brightness that white light emitting element 902 sends white light and quantum dot send white light is different, also comparatively even from the white light of the first blooming piece 600 outgoing, namely improve the homogeneity that backlight module sends white light, and then be conducive to the display effect improving liquid crystal indicator.
It should be noted that, in the present embodiment, described blue light emitting element 901 and white light emitting element 902 are in the alternately arrangement of described opening sidewalls, and therefore the number ratio of described blue light emitting element 901 and white light emitting element 902 is 1:1.But the present invention does not limit at the arrangement mode of described opening sidewalls described blue light emitting element 901 and white light emitting element 902, in other embodiments, one or more described blue light emitting element 901 can form blue light emitting element group, one or more described white light emitting element 902 can form white light emitting element group, and described blue light emitting element group and white light emitting element group are in the alternately arrangement of described opening sidewalls.By regulating each self-contained described blue light emitting element 901 and white light emitting element 902 quantity in blue light emitting element group and white light emitting element group, the number ratio of blue light emitting element 901 and white light emitting element 902 described in backlight module can be regulated.
It should be noted that, the number ratio that described white light emitting element 902 accounts for light-emitting component is larger, and the brightness that backlight module sends white light is higher.As following table 1 shows in backlight module, when blue light emitting element is different from white light emitting element number ratio, backlight module sends the brightness value (candela value) of white light.In the prior art in backlight module, when the number ratio of blue light emitting element 901 and white light emitting element 902 is 1:0, when blue light emitting element 901 is namely only set, the white brightness that backlight module sends be 6017.9 candelas/square metre, in the present embodiment, when the number ratio of described blue light emitting element 901 and white light emitting element 902 is 1:1, the white brightness that described backlight module sends be 9124 candelas/square metre.In other embodiments, can by regulating in backlight module, blue light emitting element 901 and the number ratio of white light emitting element 902, regulate the white brightness that backlight module sends.It should be noted that, when the color saturation that backlight module can provide is the even more important parameter of liquid crystal indicator, in order to the color saturation enabling backlight module provide higher, the number ratio of described blue light emitting element 901 and white light emitting element 902 can be selected at more than 1:1.
Table 1
It should be noted that, for illustrating clear by the arrangement situation of described blue light emitting element 901 and white light emitting element 902, in Figure 10, have ignored frame glue 301 (with reference to figure 9).
Also it should be noted that, continue with reference to figure 9, in the present embodiment, be also provided with reflector plate 400 between described backboard framework and described optical module, described reflector plate 400 is for reflexing to the described light-emitting component light outputted in backboard framework in described light guide plate 500.Particularly, in the present embodiment, described reflector plate 400 is between described backboard 300 and light guide plate 500.
Described first blooming piece 600 is also provided with the second optical diaphragm structure 800, and described second optical diaphragm structure 800 can comprise UV resistance film, the multi-layer optical membranes such as anti-dazzling film, and the present invention is not restricted this.
With reference to Figure 11,12, show the schematic diagram of backlight module second embodiment of the present invention.The present embodiment is roughly the same with the technical scheme of the first embodiment, and the present embodiment part that is basically the same as those in the first embodiment repeats no more, and is with the difference of the first embodiment:
With reference to Figure 11, show the cut-open view of backlight module second embodiment of the present invention, in the present embodiment, described backlight module is down straight aphototropism mode set, and described blue light emitting element 901 and white light emitting element 902 are positioned in the backboard framework of described open bottom.Described optical module comprises the diffuser plate 501 be covered on described light-emitting component, and the light that described diffuser plate 501 makes described light-emitting component send enters in the first blooming piece equably.
With reference to Figure 12, show blue light emitting element 901 described in the present embodiment and white light emitting element 902 distribution schematic diagram in described backboard framework open bottom, as shown in figure 12, described blue light emitting element 901 and white light emitting element 902 are that array-like is alternately uniformly distributed in described backboard framework open bottom.Such benefit is, described blue light emitting element 901 and white light emitting element 902 in described opening sidewalls arrangement evenly, make to be transmitted to blue light in the first blooming piece 600 and white light is evenly distributed through diffuser plate 501.When the brightness that the brightness that white light emitting element 902 sends white light and quantum dot send white light is different, also comparatively even from the white light of the first blooming piece 600 outgoing, namely improve the homogeneity that backlight module sends white light, be conducive to the display effect improving liquid crystal indicator.
It should be noted that, in the present embodiment, described in described blue light emitting element 901 and white light emitting element 902, backboard framework open bottom is that array-like is alternately uniformly distributed, and therefore the number ratio of described blue light emitting element 901 and white light emitting element 902 is 1:1.But the present invention does not limit at the arrangement mode of described open bottom described blue light emitting element 901 and white light emitting element 902, in other embodiments, multiple described blue light emitting element 901 can line up blue light emitting element row, it is capable that multiple described white light emitting element 902 can line up white light emitting element, and described blue light emitting element row and capable the replacing in described open bottom of white light emitting element are arranged.Or, multiple described white light emitting element 902 can be distributed in the array of multiple blue light emitting element 901 composition equably, by regulating each self-contained described blue light emitting element 901 and white light emitting element 902 quantity in blue light emitting element group and white light emitting element group, the number ratio of blue light emitting element 901 and white light emitting element 902 described in backlight module can be regulated.
Down straight aphototropism mode set is applied to and large scale liquid crystal display device usually, therefore when the present embodiment backlight module is applied to large scale liquid crystal display device, effectively can improve brightness and the color saturation of large scale liquid crystal panel, thus improve the display effect of large scale liquid crystal display device.
It should be noted that, in down straight aphototropism mode set, have cavity between described diffuser plate 501 and backboard 300, described diffuser plate 501 is supported on backboard 300 by diffuser plate support column 302.
In addition, in the present embodiment, in described backboard framework, backboard 300 is also different from the first embodiment with the array mode of frame glue 301, but the arrangement of this backboard 300 and frame glue 301 is this area conventional techniques, and the present invention does not repeat them here.
With reference to Figure 13, show the schematic diagram of backlight module of the present invention 3rd embodiment.The present embodiment part that is basically the same as those in the first embodiment repeats no more, and is with the difference of the first embodiment:
Described light-emitting component only comprises blue light emitting element 901, and described blue light emitting element 901 sends blue light.
Described optical module is optical module incidence surface towards the first surface of described light-emitting component, and described fluorescent powder is arranged on described optical module incidence surface.
Particularly, in the present embodiment, described backlight module is side entrance back module, described optical module is light guide plate 500, described light guide plate 500 is optical module incidence surface towards the first surface G4 of described blue light emitting element 901, described optical module incidence surface is formed the 3rd fluoresent coating 702, is provided with fluorescent powder in described 3rd fluoresent coating 702, is converted into white light for the some blue light sent by described blue light emitting element 901.
Particularly, the some blue light excitated fluorescent powder that described blue light emitting element 901 sends and send white light, another part blue light can not excitated fluorescent powder, but still exports through the 3rd fluoresent coating 702 with blue light, and described another part blue light is converted into white light by the first blooming piece 600.Change into the blue light 010 of white light relevant with fluorescent powder content in the 3rd fluoresent coating 702 with the ratio of the luminous flux of unconverted blue light.
The benefit that described fluorescent powder is arranged on described optical module incidence surface is, described fluorescent powder is nearer apart from described blue light emitting element 901, the 3rd fluoresent coating 702 is directly entered after the blue light outgoing that described blue light emitting element 901 sends, the blue light that fluorescent powder is received is more, and the fluorescent powder exposure brightness sent that is stimulated is larger.
With reference to Figure 14, show the schematic diagram of backlight module of the present invention 4th embodiment.The something in common of the present embodiment and the 3rd embodiment repeats no more, and is with the difference of the 3rd embodiment:
Described optical module is optical module exiting surface towards the second surface of described first blooming piece 600, and described fluorescent powder is arranged on described optical module exiting surface.
Particularly, in the present embodiment, described backlight module is side entrance back module, described optical module is light guide plate 500, described light guide plate 500 is optical module exiting surface towards the second surface G5 of described first blooming piece 600, described optical module exiting surface is formed the 4th fluoresent coating 703, is provided with fluorescent powder in described 4th fluoresent coating 703, is converted into white light for the some blue light sent by described blue light emitting element 901.
With reference to Figure 15, show the schematic diagram of backlight module of the present invention 5th embodiment.The something in common of the present embodiment and the 3rd embodiment repeats no more, and is with the difference of the 3rd embodiment:
In the present embodiment, described fluorescent powder is arranged at described reflector plate 400 towards on the side of described optical module.
Particularly, in the present embodiment, described backlight module is side entrance back module, described optical module is light guide plate 500, the three surperficial G6 of described reflector plate 400 towards the side of described light guide plate 500 is formed with the 5th fluoresent coating 704, be provided with fluorescent powder in described 5th fluoresent coating 704, be converted into white light for the some blue light sent by described blue light emitting element 901.
With reference to Figure 16, show the schematic diagram of backlight module of the present invention 6th embodiment.The something in common of the present embodiment and the 3rd embodiment repeats no more, and is with the difference of the 3rd embodiment:
Described first blooming piece 600 is the first blooming piece 600 incidence surface towards the surface of described optical module, and described fluorescent powder is arranged on described first blooming piece 600 incidence surface.
Particularly, in the present embodiment, described backlight module is side entrance back module, described optical module is light guide plate 500, described first blooming piece 600 is formed with the 6th fluoresent coating 705 on the 4th surperficial G7 of described light guide plate 500, in described 6th fluoresent coating 705, be provided with fluorescent powder, be converted into white light for the some blue light sent by described blue light emitting element 901.
The benefit that described fluorescent powder is arranged on described first blooming piece 600 incidence surface is, the some blue light that described blue light emitting element 901 sends is inner after multiple reflections in backboard framework, finally all enter the first blooming piece 600 by described 6th fluoresent coating 705, therefore the fluorescent powder in this enforcement can be subject to exciting of the inner each road reflect blue of backboard framework, improves the utilization factor of fluorescent powder to blue light in backlight module.
It should be noted that, in the above-mentioned the 4th to the 6th embodiment, described backlight module is side entrance back module can also be down straight aphototropism mode set, and described optical module can also be diffuser plate.
With reference to Figure 17, show the schematic diagram of backlight module of the present invention 7th embodiment.The present embodiment is roughly the same with the technical scheme of the first embodiment, described backlight module is side entrance back module, described light-emitting component 100 is positioned on the sidewall of backboard framework opening, and the part that is basically the same as those in the first embodiment repeats no more, and is with the difference of the first embodiment:
In the present embodiment, described light-emitting component 100 is the light-emitting component 100 in light-emitting device provided by the invention, therefore, can in conjunction with reference to figure 3, in the present embodiment, described light-emitting component 100 comprises:
LED luminescent wafer 101, for luminescence.
The operator guards of coated described LED luminescent wafer 101, is provided with fluorescent powder in described operator guards.Described light-emitting component 100 comprises described LED luminescent wafer 101 and operator guards.
In the present embodiment, described LED luminescent wafer 101 has exiting surface, and described first blooming piece 200 is arranged on the side of described LED luminescent wafer 101 exiting surface, and in the light path of the light sent at described LED luminescent wafer 101.
In the present embodiment, described LED luminescent wafer 101 sends blue light, and described fluorescent powder comprises the one in yellow fluorescent powder, yellow red mixed fluorescent powder or red green mixed fluorescent powder.But the present invention is not restricted this, optionally, in other embodiments, described LED luminescent wafer 101 can also send ultraviolet light.
Continue with reference to figure 3, in the present embodiment, described operator guards comprises:
The protective clear layer 102 of coated described LED luminescent wafer 101 exiting surface;
Housing 104, described protective clear layer 102 and LED luminescent wafer 101 are embedded in described housing 104, and described housing 104 exposes described protective clear layer 102.
In the present embodiment, described protective clear layer 102 comprises central area 1021 and the neighboring area 1022 around described central area, and described fluorescent powder is distributed in described neighboring area 1022.
Continue with reference to figure 3, described fluorescent powder can be subject to the some blue light that described LED luminescent wafer 101 sends and excite, thus ejecting white light, that is, some blue light 010 is converted into white light by described fluorescent powder.Another part blue light 010 sent from described LED luminescent wafer 101, by after protective clear layer 102, still with blue light outgoing, is converted into white light after the first blooming piece 600.
With by the first blooming piece 600, blue light part being entered the first blooming piece 600 is converted into white light and compares, described fluorescent powder is by optical excitation thus the blue light that the white light of outgoing enters fluorescent powder relatively has higher light conversion ratio, that is, blue light incident fluorescence powder and first blooming piece 600 respectively of same light intensity, the white light that fluorescent powder exports has higher brightness than the white light that the first blooming piece exports, therefore, the present embodiment backlight module adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the backlight module entering to adopt quantum dot light emitting mode with prior art, the white brightness sent is higher, higher color saturation can also be provided for display device simultaneously.
It should be noted that; in other embodiments; when described fluorescent powder is arranged in described operator guards equally; optionally; light-emitting component in backlight module of the present invention can also be the light-emitting component in light-emitting device provided by the invention 3rd embodiment to the 6th embodiment in any embodiment; such as, described protective clear layer 102 comprises central area and the neighboring area around described central area, and described fluorescent powder is distributed in described central area.
Or the surface that described housing 104 exposes described protective clear layer 102 is the first upper surface, and described first upper surface is provided with the first fluoresent coating, and described fluorescent powder is distributed in described first fluoresent coating.Such benefit is, because described fluorescent powder is distributed in described first fluoresent coating, described first fluoresent coating can receive the some blue light be reflected back through backlight unit, and the some blue light be reflected back described in making is converted into white light.The some blue light recycling that described optical transport Ambient returns by described first fluoresent coating, makes it be converted into white light and exports through the first blooming piece 600, increasing the light utilization efficiency of described backlight module, effectively improve the luminosity of backlight module.
The present invention does not limit the set-up mode of described fluorescent powder in described operator guards.State the effect that fluorescent powder is arranged in described operator guards to be; enable described light-emitting component adopt fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, and then make backlight module of the present invention that fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes can be adopted to send white light simultaneously.
It should be noted that; Fig. 3 is the cut-open view of light-emitting component 100; the shape of not shown light-emitting component 100 upper surface; in light-emitting component of the present invention; first upper surface of described housing 104 can be the arbitrary shape such as rectangle, circle; the surface that described protective clear layer 102 deviates from described LED luminescent wafer 101 is the second upper surface, and described second upper surface can be the arbitrary shape such as rectangle, circle, and the present invention does not all limit this.
These concrete set-up modes can with reference in each embodiment of device of giving out light provided by the invention, and the concrete structure of light-emitting component, the present invention repeats no more this.
With reference to Figure 18, show the schematic diagram of backlight module of the present invention 8th embodiment.The present embodiment is roughly the same with the technical scheme of the 7th embodiment, repeats no more with the something in common of the 7th embodiment, is with the difference of the 7th embodiment:
In the present embodiment, described backlight module is down straight aphototropism mode set, and described light-emitting component 100 is positioned in the backboard framework of described open bottom.Described optical module comprises the diffuser plate 501 be covered on described light-emitting component, and the light that described diffuser plate 501 makes described light-emitting component send enters in the first blooming piece equably.
Down straight aphototropism mode set is applied to and large scale liquid crystal display device usually, therefore when the present embodiment backlight module is applied to large scale liquid crystal display device, effectively can improve brightness and the color saturation of large scale liquid crystal panel, thus improve the display effect of large scale liquid crystal display device.
It should be noted that, in down straight aphototropism mode set, have cavity between described diffuser plate 501 and backboard 300, described diffuser plate 501 is supported on backboard 300 by diffuser plate support column 302.
In addition, in the present embodiment, in described backboard framework, backboard 300 is also different from the first embodiment with the arrangement of frame glue 301, but the arrangement of this backboard 300 and frame glue 301 is this area conventional techniques, and the present invention does not repeat them here.
The present invention also provides a kind of liquid crystal indicator, comprising: backlight module provided by the invention; Be positioned at the display panels on described backlight module.
Backlight module provided by the invention adopts fluorescent powder stimulated luminescence and quantum dot light emitting two kinds of modes to send white light simultaneously, compared with the backlight module only adopting quantum dot light emitting mode with prior art, the white brightness sent is higher, can also provide higher color saturation for display device simultaneously.Therefore the brightness of liquid crystal indicator of the present invention and color saturation higher, display effect is better.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; the any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all belong to the protection domain of technical solution of the present invention.

Claims (24)

1. a light-emitting device, is characterized in that, comprising:
LED luminescent wafer;
The operator guards of coated described LED luminescent wafer, is provided with fluorescent powder in described operator guards;
Be arranged on the first blooming piece outside described operator guards, in described first blooming piece, be dispersed with quantum dot;
Described fluorescent powder can be subject to the part optical excitation that described LED luminescent wafer sends, thus ejecting white light; Another part light sent from described LED luminescent wafer is converted into white light after described first blooming piece of arrival.
2. light-emitting device as claimed in claim 1, it is characterized in that, described LED luminescent wafer has exiting surface, and described first blooming piece is arranged on the side of described LED luminescent wafer exiting surface, and in the light path of the light sent at described LED luminescent wafer.
3. light-emitting device as claimed in claim 2, it is characterized in that, described LED luminescent wafer sends blue light or ultraviolet light.
4. light-emitting device as claimed in claim 3, it is characterized in that, described LED luminescent wafer sends blue light, and described fluorescent powder comprises yellow fluorescent powder, yellow red mixed fluorescent powder or red green mixed fluorescent powder.
5. light-emitting device as claimed in claim 2, it is characterized in that, described operator guards comprises:
The protective clear layer of coated described LED luminescent wafer exiting surface;
Housing, described protective clear layer and LED luminescent wafer are embedded in described housing, and described housing exposes described protective clear layer.
6. light-emitting device as claimed in claim 5, it is characterized in that, described protective clear layer comprises central area and the neighboring area around described central area, and described fluorescent powder is distributed in described central area, or is distributed in described neighboring area.
7. light-emitting device as claimed in claim 5, it is characterized in that, described fluorescent powder is uniformly distributed in described protective clear layer, and the fluorescent powder content in described protective clear layer is below first threshold.
8. light-emitting device as claimed in claim 5, it is characterized in that, the surface that described housing exposes described protective clear layer is the first upper surface, and described first upper surface is provided with the first fluoresent coating, and described fluorescent powder is distributed in described first fluoresent coating.
9. light-emitting device as claimed in claim 5; it is characterized in that; the surface that described protective clear layer deviates from described LED luminescent wafer is the second upper surface, and described second upper surface is provided with the second fluoresent coating, and described fluorescent powder is distributed in described second fluoresent coating.
10. a backlight module, is characterized in that, comprising:
Light-emitting component, for luminescence;
First blooming piece, is dispersed with quantum dot in described first blooming piece, is converted into white light for the non-white light sent by described light-emitting component;
Optical module, is arranged between described light-emitting component and described first blooming piece, for the light of described light-emitting component is conducted to described first blooming piece;
The light path of described backlight module in described light-emitting component or between described light-emitting component to described first blooming piece is also provided with fluorescent powder, described fluorescent powder is used for sending white light by non-white light excites, and the white light that described fluorescent powder sends exports through the first blooming piece.
11. backlight modules as claimed in claim 10, is characterized in that, described fluorescent powder is used for being subject to blue-light excited and sending white light, and described fluorescent powder comprises yellow fluorescent powder, yellow red mixed fluorescent powder or red green mixed fluorescent powder.
12. backlight modules as claimed in claim 10, it is characterized in that, described backlight module also comprises backboard framework, and described first blooming piece and optical module are embedded in the opening of described backboard framework, and described first blooming piece is positioned on described optical module;
Described light-emitting component is positioned on the sidewall of described opening, or described light-emitting component is positioned in the backboard framework of described open bottom.
13. backlight modules as claimed in claim 12, it is characterized in that, described backlight module is down straight aphototropism mode set, and described light-emitting component is positioned in the backboard framework of described open bottom; Described optical module comprises the diffuser plate be covered on described light-emitting component, and the light that described diffuser plate makes described light-emitting component send enters in the first blooming piece equably.
14. backlight modules as claimed in claim 13, it is characterized in that, described light-emitting component comprises blue light emitting element and white light emitting element, and described blue light emitting element and white light emitting element include LED luminescent wafer, and described LED luminescent wafer sends blue light; Described fluorescent powder is arranged on described white light emitting element, makes the blue light that in described white light emitting element, LED luminescent wafer sends be converted into white light; Described blue light emitting element and white light emitting element are that array-like is alternately uniformly distributed in described open bottom.
15. backlight modules as claimed in claim 12, it is characterized in that, described backlight module is side entrance back module, and described light-emitting component is positioned on the sidewall of described opening; Described optical module comprises the light guide plate being covered in open bottom, the light change direction that described light guide plate sends for making described light-emitting component, to enter in the first blooming piece from described open bottom direction upwards.
16. backlight modules as claimed in claim 15, it is characterized in that, described light-emitting component comprises blue light emitting element and white light emitting element, and described blue light emitting element and white light emitting element include LED luminescent wafer, and described LED luminescent wafer is used for sending blue light; Described fluorescent powder is arranged on described white light emitting element, makes the blue light that in described white light emitting element, LED luminescent wafer sends be converted into white light, and described blue light emitting element and white light emitting element are in the alternately arrangement of described opening sidewalls.
17. backlight modules as claimed in claim 12, it is characterized in that, also reflector plate is provided with between described backboard framework and described optical module, described reflector plate is for reflexing in described optical module by the described light-emitting component light outputted in backboard framework, and described fluorescent powder is arranged at described reflector plate towards on the side of described optical module.
18. backlight modules as claimed in claim 12, is characterized in that, described first blooming piece is the first blooming piece incidence surface towards the surface of described optical module, and described fluorescent powder is arranged on described first blooming piece incidence surface.
19. backlight modules as claimed in claim 12, it is characterized in that, described optical module is optical module incidence surface towards the first surface of described light-emitting component, described optical module is optical module exiting surface towards the second surface of described first blooming piece, and described fluorescent powder is arranged on described optical module incidence surface or optical module exiting surface.
20. backlight modules as claimed in claim 10, it is characterized in that, described light-emitting component comprises:
LED luminescent wafer, for sending blue light;
The operator guards of coated described LED luminescent wafer, is provided with fluorescent powder in described operator guards;
Described fluorescent powder can be subject to the some blue light that described LED luminescent wafer sends and excite, thus ejecting white light; Another part blue light sent from described LED luminescent wafer is converted into white light after described first blooming piece of arrival.
21. backlight modules as claimed in claim 20, it is characterized in that, described LED luminescent wafer has exiting surface, and described operator guards comprises:
The protective clear layer of coated described LED luminescent wafer exiting surface;
Housing, described protective clear layer and LED luminescent wafer are embedded in described housing, and described housing exposes described protective clear layer.
22. backlight modules as claimed in claim 21, it is characterized in that, described protective clear layer comprises central area and the neighboring area around described central area, and described fluorescent powder is distributed in described central area, or is distributed in described neighboring area.
23. backlight modules as claimed in claim 22, is characterized in that, the surface that described housing exposes described protective clear layer is the first upper surface, and described first upper surface is provided with the first fluoresent coating, and described fluorescent powder is distributed in described first fluoresent coating.
24. 1 kinds of liquid crystal indicators, is characterized in that, comprising:
As the backlight module in claim 10 to 23 as described in any one;
Be positioned at the display panels on described backlight module.
CN201410855442.4A 2014-12-31 2014-12-31 Light-emitting device, backlight module and liquid crystal display device Active CN104483778B (en)

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CN104808386A (en) * 2015-04-28 2015-07-29 武汉华星光电技术有限公司 Light source unit, backlight module and a liquid crystal display
CN104808386B (en) * 2015-04-28 2018-05-29 武汉华星光电技术有限公司 Light source unit, backlight module and liquid crystal display
CN106200115A (en) * 2015-05-29 2016-12-07 鸿富锦精密工业（深圳）有限公司 Backlight module and display device
CN104865749A (en) * 2015-06-03 2015-08-26 武汉华星光电技术有限公司 Optical diaphragm set, backlight module and liquid crystal display
CN106501994A (en) * 2015-09-08 2017-03-15 青岛海信电器股份有限公司 A kind of quantum dot light emitting device, backlight module and display device
CN105717701A (en) * 2016-01-30 2016-06-29 贵阳海信电子有限公司 Backlight module for large-screen LCM and large-screen LCM
CN107300805A (en) * 2016-04-15 2017-10-27 深圳市华想世纪科技有限公司 A kind of quantum dot and the LCDs of YAG fluorescent powder blending
CN107300804A (en) * 2016-04-15 2017-10-27 深圳市华想世纪科技有限公司 A kind of quantum dot and the liquid crystal display of YAG fluorescent powder blending
CN107403856B (en) * 2016-05-19 2019-10-22 华为终端有限公司 A kind of LED and its manufacturing method and electronic equipment using the LED
WO2017197866A1 (en) * 2016-05-19 2017-11-23 华为技术有限公司 Led and manufacturing method therefor, and electronic device using the led
CN107403856A (en) * 2016-05-19 2017-11-28 华为终端（东莞）有限公司 A kind of LED and its manufacture method and the electronic equipment using the LED
CN106950752A (en) * 2017-05-02 2017-07-14 京东方科技集团股份有限公司 A kind of backlight module and preparation method thereof and display device
US11150514B2 (en) 2018-04-28 2021-10-19 Hefei Boe Vision-Electronic Technology Co., Ltd. Reflective sheet and manufacturing method therefor, and direct-lit back light module and display device
CN108775541A (en) * 2018-06-25 2018-11-09 福州大学 A kind of novel quantum dot body light guide plate back light module unit structure and preparation method thereof
CN108775541B (en) * 2018-06-25 2020-03-10 福州大学 Novel quantum dot light guide plate backlight module structure and preparation method thereof
WO2021114526A1 (en) * 2019-12-13 2021-06-17 海信视像科技股份有限公司 Display device
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CN113359345A (en) * 2020-03-04 2021-09-07 华为技术有限公司 Electronic device
CN113359345B (en) * 2020-03-04 2023-06-02 华为技术有限公司 Electronic equipment
CN112835225A (en) * 2021-03-17 2021-05-25 维沃移动通信有限公司 Touch display device and electronic equipment
WO2022222181A1 (en) * 2021-04-22 2022-10-27 深圳市华星光电半导体显示技术有限公司 Backlight module and quantum dot display apparatus
US12019329B2 (en) 2021-04-22 2024-06-25 Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Backlight module and quantum dot display device

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