CN102427075A - Light emitting diode device and field sequence display - Google Patents
Light emitting diode device and field sequence display Download PDFInfo
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- CN102427075A CN102427075A CN2011103173969A CN201110317396A CN102427075A CN 102427075 A CN102427075 A CN 102427075A CN 2011103173969 A CN2011103173969 A CN 2011103173969A CN 201110317396 A CN201110317396 A CN 201110317396A CN 102427075 A CN102427075 A CN 102427075A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
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Abstract
The invention discloses a light-emitting diode device and a field sequence display comprising the same. The separation structure separates the accommodating space surrounded by the cup-shaped structure into a first block and a second block. The first block is provided with a first blue light chip and a first packaging colloid, and the second block is provided with a second blue light chip and a second packaging colloid. The second packaging colloid is mixed with green light fluorescent powder and is used for completely converting the monochromatic emission spectrum of the second blue light wave band of the second blue light chip into the monochromatic emission spectrum of the green light wave band. The green phosphor is selected from one of silicate, oxynitride, lutetium aluminum oxide and calcium scandium oxide. The invention can reduce the characteristic difference among different color light chips of the traditional light-emitting diode device and improve the overall efficiency of the device.
Description
Technical field
The present invention is relevant with light-emitting diode; Particularly about a kind of light-emitting diode assembly that is applied in the liquid crystal indicator; It forms green or red monochromatic source through blue chip collocation fluorescent material; Property difference with the different color light chip chamber that reduces traditional light-emitting diode assembly promotes its whole efficiency.
Background technology
In recent years, along with showing constantly development of science and technology, with regard to volume production scale and product application popularization property, (Liquid Crystal Display LCD) is sure to occupy the main flow of plane Display Technique to LCD far and away.In various LCDs; Color sequential liquid crystal display (Color Sequential LCD; CS-LCD) because can the elevator system colour gamut and saturation, reduction material cost; Even significantly improve the electric light conversion usefulness of display floater, so can satisfy the plane of new generation Display Technique specification requirement of wide colour gamut, high-resolution and low power consumption.
Because look preface formula lcd technology does not need colored filter; So each pixel in the Liquid Crystal Module of color sequential liquid crystal display does not need to be partitioned into sub-pixel again; With direct type backlight module shown in Figure 1 is example; The formation of its color is to switch redness (R) light source 10 in the light-emitting diode (LED) backlight module (LED Backlight Module) 1, green (G) light source 12 and blue (B) light source 14 according to sequential; Collocation shows the liquid crystal pixel penetrance that the time inter-sync is controlled in each color light source, to allocate the relative light quantity of each primary colors, is got by the integral action of vision system photic stimuli again.Because the light that light-emitting diode sent has the spectral characteristic of narrow halfwidth; Can demonstrate the color of high color saturation and the colour gamut of effective expansion system; So in the characteristic performance of high color saturation, color sequential liquid crystal display more generally uses the LCD of colored filter to come desirablely.
Please with reference to Fig. 2, Fig. 2 illustrates the led designs of the backlight module of another traditional color sequential liquid crystal display.As shown in Figure 2; The light-emitting diode 20 of color sequential liquid crystal display sends ruddiness, green glow and blue light in the specific time respectively by the red light-emitting diode chip (LEDChip) 200, green light LED chip 202 and the blue LED chip 204 that are arranged in the accommodation space S that cup-like structure 21 surrounded in regular turn; Utilize ruddiness, green glow and blue light to carry out colour mixture again; Because the speed that the look preface is switched surpasses perception of human eyes frequency (60Hz), thus human brain can be because of visual persistence effect with the picture effect superposition to experience full-color picture.
Generally speaking, color sequential liquid crystal display has advantage: colored filter need not used in (1), reduces cost and improves whole efficiency; (2) do not need the somewhat complex design of RGB sub-pixel, improved the manufacturing yields of thin-film transistor array base-plate (TFT Array Substrate), the complexity of simplified control circuit reduces power consumption; (3) increase pixel aperture ratio (Aperture Ratio), the space that helps improving panel pixel makes panel pixel have high-resolution; (4) demonstrate the color of high color saturation and the colour gamut of effective expansion system.
Yet; The light-emitting diode (LED) backlight module 20 of color sequential liquid crystal display need possess red light-emitting diode chip 200, green light LED chip 202 and blue LED chip 204 simultaneously; Because the light-emitting diode chip for backlight unit of red light-emitting diode chip 200, green light LED chip 202 and blue LED chip 204 these three kinds of different primary colors has characteristics such as different photoelectricity and life-span respectively; The efficient of adding green light LED chip 202 is not good; And red light-emitting diode chip 200 is too responsive for temperature; Be prone to cause heat to decline and phenomenon such as colour cast, seriously influence the whole efficiency and the useful life of color sequential liquid crystal display.
Summary of the invention
Therefore, a category of the present invention is to propose a kind of light-emitting diode assembly that is applied in the liquid crystal indicator, to solve the above-mentioned variety of problems that prior art was suffered from.
In an embodiment, liquid crystal indicator comprises liquid crystal panel and backlight module, and backlight module is corresponding to the liquid crystal panel setting.Backlight module comprises framework and LED optical strip, and LED optical strip is disposed in the framework.LED optical strip comprises circuit board and light-emitting diode assembly, and light-emitting diode assembly is disposed on the circuit board.
Light-emitting diode assembly comprises substrate, cup-like structure and separation structure.Wherein, cup-like structure is arranged on the substrate, and surrounds accommodation space; Separation structure is arranged in the accommodation space, and accommodation space is separated out first block and second block.Be provided with first blue chip and first packing colloid in first block, wherein first blue chip has the monochromatic emission spectrum of first blue wave band, and first packing colloid coats and encapsulate first blue chip.Be provided with second blue chip and second packing colloid in second block, wherein second blue chip has the monochromatic emission spectrum of second blue wave band, and second packing colloid coats and encapsulate second blue chip.Being mixed with green light fluorescent powder in second packing colloid, is the monochromatic emission spectrum of green light band in order to the monochromatic emission spectrum of changing second blue wave band fully.Green light fluorescent powder be selected from silicate, nitrogen oxide, gold-plating aluminum oxide and calcium scandium oxide one of them.
In an embodiment, above-mentioned green light fluorescent powder is selected silicate for use, and the part by weight scope of the green light fluorescent powder and second packing colloid is between 80% and 160%.In fact, silicate can comprise (Ca, Sr, Ba)
2SiO
4: Eu.
In an embodiment, above-mentioned green light fluorescent powder is selected nitrogen oxide for use, and the part by weight scope of the green light fluorescent powder and second packing colloid is between 90% and 180%.In fact, nitrogen oxide can comprise β-SiAlON:Eu.
In an embodiment, above-mentioned green light fluorescent powder is selected the gold-plating aluminum oxide for use, and the part by weight scope of the green light fluorescent powder and second packing colloid is between 80% and 160%.In fact, the gold-plating aluminum oxide can comprise Lu
3Al
5O
12: Ce.
In an embodiment, above-mentioned green light fluorescent powder is selected calcium scandium oxide for use, and the part by weight scope of the green light fluorescent powder and second packing colloid is between 90% and 180%.In fact, calcium scandium oxide can comprise CaSc
2O
4: Ce.
In an embodiment, be provided with first red light chips in addition in above-mentioned first block, first red light chips has the monochromatic emission spectrum of first red spectral band, and first packing colloid coats and encapsulate first blue chip and first red light chips.
In an embodiment, above-mentioned separation structure is separated out the 3rd block with accommodation space in addition.In fact, can be provided with second red light chips and the 3rd packing colloid in the 3rd block, wherein second red light chips has the monochromatic emission spectrum of second red spectral band, and the 3rd packing colloid coats and encapsulate this second red light chips.
In addition, also can be provided with the 3rd blue chip and the 4th packing colloid in the 3rd block, wherein the 3rd blue chip has the monochromatic emission spectrum of the 3rd blue wave band, and the 4th packing colloid coats and encapsulate the 3rd blue chip.Be mixed with red light fluorescent powder in the 4th packing colloid, red light fluorescent powder converts the monochromatic emission spectrum of the 3rd blue wave band into the monochromatic emission spectrum of red spectral band fully.Red light fluorescent powder is selected nitride for use.
In an embodiment, above-mentioned red light fluorescent powder is selected nitride for use, and the part by weight scope of red light fluorescent powder and the 3rd packing colloid is between 24% and 120%.In fact, nitride can comprise (Ca, Sr) AlSiN
3: Eu or (Ca, Sr, Ba)
2Si
5N
8: Eu.
In another embodiment, light-emitting diode assembly comprises substrate, cup-like structure and separation structure.Wherein, cup-like structure is arranged on the substrate, and surrounds accommodation space; Separation structure is arranged in the accommodation space, and accommodation space is separated out first block and second block.Be provided with first blue chip and first packing colloid in first block, wherein first blue chip has the monochromatic emission spectrum of first blue wave band, and first packing colloid coats and encapsulate first blue chip.Be provided with second blue chip and second packing colloid in second block, wherein second blue chip has the monochromatic emission spectrum of second blue wave band, and second packing colloid coats and encapsulate second blue chip.Be mixed with fluorescent material in second packing colloid, convert white light emission spectrum fully in order to monochromatic emission spectrum with second blue wave band.
In an embodiment, fluorescent material be selected from yellow fluorescent powder, yellow and red fluorescence powder and green and red fluorescence powder one of them.
In an embodiment, above-mentioned separation structure is separated out the 3rd block with accommodation space in addition.In fact, can be provided with the 3rd blue chip and the 3rd packing colloid in the 3rd block, wherein the 3rd blue chip has the monochromatic emission spectrum of the 3rd blue wave band, and the 3rd packing colloid coats and encapsulate the 3rd blue chip.
In an embodiment, can be mixed with red light fluorescent powder in above-mentioned the 3rd packing colloid, convert the monochromatic emission spectrum of red spectral band fully in order to monochromatic emission spectrum with the 3rd blue wave band.After first packing colloid, second packing colloid and the 3rd packing colloid were launched blue light, white light and ruddiness respectively, white light can convert green glow into through green color filter.
In an embodiment, can be mixed with green light fluorescent powder in above-mentioned the 3rd packing colloid, convert the monochromatic emission spectrum of green light band fully in order to monochromatic emission spectrum with the 3rd blue wave band.After first packing colloid, second packing colloid and the 3rd packing colloid were launched blue light, white light and green glow respectively, white light can convert ruddiness into through Red lightscreening plate.
In an embodiment; Can be mixed with in above-mentioned first packing colloid in red light fluorescent powder and the 3rd packing colloid and be mixed with green light fluorescent powder; Red light fluorescent powder converts the monochromatic emission spectrum of first blue wave band monochromatic emission spectrum of red spectral band into fully, and green light fluorescent powder converts the monochromatic emission spectrum of the 3rd blue wave band into the monochromatic emission spectrum of green light band fully.After first packing colloid, second packing colloid and the 3rd packing colloid were launched ruddiness, white light and green glow respectively, white light can convert blue light into through blue color filter.
In another embodiment, a sequence displayer comprises display module and backlight module.Wherein, display module has the filter of solid color, and backlight module has a plurality of light-emitting diode assemblies.Light-emitting diode assembly comprises substrate, cup-like structure and separation structure.Cup-like structure is arranged on the substrate, and surrounds an accommodation space.Separation structure is arranged in the accommodation space, and accommodation space is separated out a plurality of blocks.First block in these a plurality of blocks forms white light, and first block is corresponding to the filter of solid color.
In an embodiment, the filter part of above-mentioned solid color has color.
In an embodiment, the filter of above-mentioned solid color is a green color filter, does not form blue light and ruddiness respectively corresponding to second block and the 3rd block of the filter of solid color in these a plurality of blocks.
In an embodiment, the filter of above-mentioned solid color is a Red lightscreening plate, does not form blue light and green glow respectively corresponding to second block and the 3rd block of the filter of solid color in these a plurality of blocks.
In an embodiment, the filter of above-mentioned solid color is a blue color filter, does not form ruddiness and green glow respectively corresponding to second block and the 3rd block of the filter of solid color in these a plurality of blocks.
Compared to prior art; Light-emitting diode assembly in the liquid crystal indicator that the present invention disclosed forms green monochromatic source or red monochromatic source through blue chip collocation fluorescent material; Reduce the property difference between three kinds of different color light chips of traditional light-emitting diode assembly effectively; Because the efficient of the formed green monochromatic source of blue chip collocation fluorescent material is come highly far beyond traditional green glow chip; And the also more traditional red light chips excellence of the thermal stability of the formed red monochromatic source of blue chip collocation fluorescent material; Therefore, the whole efficiency of light-emitting diode assembly of the present invention also is superior to the light-emitting diode assembly that tradition has three kinds of different color light chips significantly.In addition; The present invention also discloses the light-emitting diode assembly that is applicable to mixed type field colour gamut display unit; It forms white light source through single blue chip collocation fluorescent material, and the white light source that collocation is red, blueness or green color filter will parts converts ruddiness, blue light or green glow into, does not need to drive simultaneously three chips ruddiness, blue light and green glow are mixed into white light; So can significantly improve the efficient of light-emitting diode assembly; And (Color Break-Up, CBU) phenomenon is to improve the quality of show image to reduce the look separation by the picture that produces four kinds of colors.In addition, light-emitting diode assembly of the present invention also has that white light is comparatively stable, production is higher and advantage such as cost reduction, makes the market competitiveness of liquid crystal indicator with above-mentioned light-emitting diode assembly can obtain effective lifting.
Describe the present invention below in conjunction with accompanying drawing and specific embodiment, but not as to qualification of the present invention.
Description of drawings
Fig. 1 is traditional color sequential liquid crystal display switches red light source, green light source and blue-light source in the light-emitting diode (LED) backlight module according to sequential a sketch map;
Fig. 2 is the design of the light-emitting diode (LED) backlight module of traditional volume color sequential liquid crystal display;
Fig. 3 is the cross section view according to the light-emitting diode assembly of a specific embodiment of the present invention;
Fig. 4 is the cross section view according to the light-emitting diode assembly of another specific embodiment of the present invention;
Fig. 5 is the cross section view according to the light-emitting diode assembly of another specific embodiment of the present invention;
Fig. 6 is the cross section view according to the light-emitting diode assembly of the collocation green color filter of another specific embodiment of the present invention;
Fig. 7 is the cross section view according to the light-emitting diode assembly of the collocation Red lightscreening plate of another specific embodiment of the present invention;
Fig. 8 is the cross section view according to the light-emitting diode assembly of the collocation blue color filter of another specific embodiment of the present invention.
Wherein, Reference numeral
1,20: light-emitting diode (LED) backlight module 10: red light source
12: green light source 14: blue-light source
21: cup-like structure 23: packing colloid
200: red light-emitting diode chip 202: the green light LED chip
204: blue LED chip 3～8: light-emitting diode assembly
30,40,50,60,70,80: substrate
31,41,51,61,71,81: cup-like structure
32,42,62,72,82: the first separation structures
33,43,63,73,83: the second separation structures
34,44,54,64,74,84: the first blue chips
35,45,55,65,75,85: the second blue chips
36,66,76,86: the three blue chips
37,47,57,67,77,87: the first packing colloids
38,48,58,68,78,88: the second packing colloids
49,69,79,89: the three packing colloids
GP: green light fluorescent powder RP: red light fluorescent powder
YP: gold-tinted fluorescent material GF: green color filter
RF: Red lightscreening plate BF: blue color filter
S1: the first block S2: second block
S3: the 3rd block S: accommodation space
46,56: red light chips 52: separation structure
39: the four packing colloids
Embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention being carried out detailed description, further understanding the object of the invention, scheme and effect, but is not the restriction as accompanying claims protection range of the present invention.
The present invention discloses a kind of light-emitting diode assembly that is applied to liquid crystal indicator.Because the efficient of the green light LED chip of the light-emitting diode assembly in the prior art is not good; And the red light-emitting diode chip is too responsive and cause heat to decline and phenomenon such as colour cast takes place for temperature; Light-emitting diode assembly of the present invention forms green or red monochromatic source through its blue LED chip collocation fluorescent material; Reduce the property difference between the different color light light-emitting diode chip for backlight unit, to promote the whole efficiency of liquid crystal indicator.
A preferred embodiment according to the present invention is a kind of light-emitting diode assembly that is applied to liquid crystal indicator.In this embodiment, liquid crystal indicator is a color sequential liquid crystal display.Liquid crystal indicator comprises liquid crystal panel and backlight module, and backlight module is corresponding to the liquid crystal panel setting.Backlight module comprises framework and LED optical strip, and LED optical strip is disposed in the framework.LED optical strip comprises circuit board and light-emitting diode assembly, and light-emitting diode assembly is disposed on the circuit board.Next, will carry out detailed introduction with regard to the light-emitting diode assembly in the above-mentioned backlight module.
Please with reference to Fig. 3, Fig. 3 is the cross section view of the light-emitting diode assembly among the embodiment for this reason.As shown in Figure 3, light-emitting diode assembly 3 comprises substrate 30, cup-like structure 31, first separation structure 32, second separation structure 33, first blue chip 34, second blue chip 35, the 3rd blue chip 36, first packing colloid 37, second packing colloid 38, the 4th packing colloid 39, green light fluorescent powder GP and red light fluorescent powder RP.
In this embodiment, cup-like structure 31 is arranged on the substrate 30, and surrounds an accommodation space; First separation structure 32 and second separation structure 33 are arranged in this accommodation space, and first separation structure 32 and second separation structure 33 are separated out the first block S1, the second block S2 and the 3rd block S3 with this accommodation space.In preferred embodiment, first separation structure 32 and second separation structure 33 are thin than the sidewall of cup-like structure 31, therefore can make each block comparatively approaching, to obtain preferable mixed light effect.Wherein, first blue chip 34 and first packing colloid 37 are arranged in the first block S1; Second blue chip 35 and second packing colloid 38 are arranged in the second block S2, and green light fluorescent powder GP is mixed in second packing colloid 38; The 3rd blue chip 36 and the 4th packing colloid 39 are arranged in the 3rd block S3, and red light fluorescent powder RP is mixed in the 4th packing colloid 39.
First blue chip 34 has the monochromatic emission spectrum of first blue wave band; Second blue chip 35 has the monochromatic emission spectrum of second blue wave band; The 3rd blue chip 36 has the monochromatic emission spectrum of the 3rd blue wave band.First packing colloid 37 is in order to coat and to encapsulate first blue chip 34; Second packing colloid 38 is in order to coat and to encapsulate second blue chip 35; The 4th packing colloid 39 is in order to coat and to encapsulate the 3rd blue chip 36.
It should be noted that the monochromatic emission spectrum of second blue wave band that the green light fluorescent powder GP that is mixed in second packing colloid 38 can be launched second blue chip 35 converts the monochromatic emission spectrum of green light band fully into; In other words, from the light that second packing colloid 38 penetrates, its frequency spectrum will concentrate on green light band, can not penetrate the blue ray of the monochromatic emission spectrum of original second blue chip 35 fully.For reaching the conversion fully of spectrum, in preferred embodiment, can the concentration of green light fluorescent powder GP be adjusted to proper range; Or the proportioning components of green light fluorescent powder GP done suitable adjustment.
In addition, the monochromatic emission spectrum that is mixed in the 3rd blue wave band that the red light fluorescent powder RP in the 4th packing colloid 39 also can be launched the 3rd blue chip 36 converts the monochromatic emission spectrum of red spectral band fully into; In other words, from the light that the 4th packing colloid 39 penetrates, its frequency spectrum will concentrate on red spectral band, can not penetrate the blue ray of the monochromatic emission spectrum of original the 3rd blue chip 36 fully.For reaching the conversion fully of spectrum, in preferred embodiment, can the concentration of red light fluorescent powder RP be adjusted to proper range; Or the proportioning components of red light fluorescent powder RP done suitable adjustment.
Table one
Light-emitting diode assembly 3 shown in Figure 3 adopts second blue chip 35 collocation green light fluorescent powder GP replacing traditional green glow chip in the second block S2, and in the 3rd block S3, adopts the 3rd blue chip 36 collocation red light fluorescent powder RP to replace traditional red light chips.Please with reference to table one, the experimental data of the whole efficiency of the light-emitting diode assembly that table one is listed Fig. 2～Fig. 4 respectively and illustrated.Shown in table; Prove through experiment: the whole efficiency lm/W value of the light-emitting diode assembly 3 among Fig. 3 is 67.8; And the whole efficiency lm/W value of traditional light-emitting diode assembly 20 shown in Figure 2 is merely 43.2; That is the whole efficiency of the light-emitting diode assembly among Fig. 33 traditional light-emitting diode assembly more shown in Figure 2 20 improve about 57% more than, so its effect is quite remarkable.Wherein, so-called whole efficiency is meant output light flux/input electric power, and unit is lm/W, and in order to the white light efficient behind three kinds of light sources compositions of comparison RGB white light, that is the white light of relatively forming is strong and weak.
Table two
Please with reference to table two, table two is listed the experimental data of thermal stability of the light-emitting diode assembly 3 of traditional light-emitting diode assembly 20 of the employing red light chips 200 among Fig. 2 and the employing blue chip 36+ red light fluorescent powder RP among Fig. 3 respectively.Shown in table two; Prove through experiment: the relative intensity of traditional light-emitting diode assembly 20 of the employing red light chips 200 among Fig. 2 is along with the amplitude of variations in temperature; Just thermal stability be about-0.6%/℃; And the relative intensity of the light-emitting diode assembly 3 of the employing blue chip 36+ red light fluorescent powder RP among Fig. 3 is along with the amplitude of variations in temperature, just thermal stability be about-0.3%/℃.That is to say that the thermal stability of the light-emitting diode assembly 3 of the employing blue chip 36+ red light fluorescent powder RP among Fig. 3 is superior to traditional light-emitting diode assembly 20 of the employing red light chips 200 among Fig. 2 significantly.This is because light-emitting diode assembly 3 adopts the traditional red light chips of the 3rd blue chip 36 collocation red light fluorescent powder RP replacement in the 3rd block S3, so its thermal stability can more traditional red light chips improved approximately 50% more than, effect is quite remarkable.Wherein, so-called thermal stability is meant relative intensity slippage/environment ascending temperature, unit be %/℃.As far as equal ambient temperature recruitment, if the reduction of relative intensity is less, then the absolute value of thermal stability also can be less; That is to say that relative intensity is along with variation of temperature can be less, therefore, this has represented preferable thermal stability, and vice versa.
In this embodiment; The light-emitting diode assembly 3 of color sequential liquid crystal display is sent the monochromatic emission spectrum of first blue wave band, second blue wave band and the 3rd blue wave band in regular turn respectively by first blue chip 34, second blue chip 35 and the 3rd blue chip 36 that are arranged at the first block S1, the second block S2 and the 3rd block S3 respectively in the specific time; Wherein the monochromatic emission spectrum of second blue wave band that sent of second blue chip 35 will be mixed in the monochromatic emission spectrum that green light fluorescent powder GP in second packing colloid 38 converts green light band fully into, and the monochromatic emission spectrum of the 3rd blue light that the 3rd blue chip 36 is sent will be mixed in the monochromatic emission spectrum that red light fluorescent powder RP in the 4th packing colloid 39 converts red spectral band fully into.Because the look preface switch speed between the monochromatic emission spectrum of first blue wave band, green light band and red spectral band surpasses perception of human eyes frequency (60Hz), thus human brain can be because of visual persistence effect with the picture effect superposition to experience full-color picture.
In practical application; Because silicate (silicate), nitrogen oxide (oxynitride), gold-plating aluminum oxide (lutetium aluminum oxide) and calcium scandium oxide (calcium scandium oxide) can be used to fully the monochromatic emission spectrum of second blue wave band of second blue chip 35 is converted into the monochromatic emission spectrum of green light band; Therefore; The green light fluorescent powder GP that is mixed in second packing colloid 38 can be silicate, nitrogen oxide, gold-plating aluminum oxide or calcium scandium oxide, but the present invention is not as limit.
In an embodiment, what be mixed in that green light fluorescent powder GP in second packing colloid 38 selected for use is silicate.If the part by weight scope of green light fluorescent powder GP (silicate) and second packing colloid 38 system is less than 80% or greater than 160%, then green light fluorescent powder GP (silicate) can't be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into.Therefore, preferably, the part by weight scope of the green light fluorescent powder GP (silicate) and second packing colloid 38 is between 80% and 160%.In fact, because (Ca, Sr, Ba)
2SiO
4: Eu can be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into, thus the silicate that green light fluorescent powder GP is selected for use can comprise (Ca, Sr, Ba)
2SiO
4: Eu, but the present invention is not as limit.
In another embodiment, what be mixed in that green light fluorescent powder GP in second packing colloid 38 selected for use is nitrogen oxide.If the part by weight scope of green light fluorescent powder GP (nitrogen oxide) and second packing colloid 38 is less than 90% or greater than 180%, then green light fluorescent powder GP (nitrogen oxide) can't be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into.Therefore, preferably, the part by weight scope of the green light fluorescent powder GP (nitrogen oxide) and second packing colloid 38 is between 90% and 180%.In fact; Because β-SiAlON:Eu can be is fully converted the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into; So the nitrogen oxide that green light fluorescent powder GP is selected for use can comprise β-SiAlON:Eu, but the present invention is not as limit.
In another embodiment, what be mixed in that green light fluorescent powder GP in second packing colloid 38 selected for use is the gold-plating aluminum oxide.If the part by weight scope of green light fluorescent powder GP (gold-plating aluminum oxide) and second packing colloid 38 is less than 80% or greater than 160%, then green light fluorescent powder GP (gold-plating aluminum oxide) can't be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into.Therefore, preferably, the part by weight scope of the green light fluorescent powder GP (gold-plating aluminum oxide) and second packing colloid 38 is between 80% and 160%.In fact, because Lu
3Al
5O
12: Ce can be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into, so the gold-plating aluminum oxide that green light fluorescent powder GP is selected for use can comprise Lu
3Al
5O
12: Ce, but the present invention is not as limit.
In another embodiment, what be mixed in that green light fluorescent powder GP in second packing colloid 38 selected for use is calcium scandium oxide.If the part by weight scope of green light fluorescent powder GP (calcium scandium oxide) and second packing colloid 38 is less than 90% or greater than 180%, then green light fluorescent powder GP (calcium scandium oxide) can't be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into.Therefore, preferably, the part by weight scope of the green light fluorescent powder GP (calcium scandium oxide) and second packing colloid 38 is between 90% and 180%.In fact, because CaSc
2O
4: Ce can be fully converts the monochromatic emission spectrum of second blue wave band of second blue chip 35 the monochromatic emission spectrum of green light band into, so the gold-plating aluminum oxide that green light fluorescent powder GP is selected for use can comprise CaSc
2O
4: Ce, but the present invention is not as limit.
In practical application; Because nitride (nitride) can be is fully converted the monochromatic emission spectrum of the 3rd blue wave band of the 3rd blue chip 36 the monochromatic emission spectrum of red spectral band into; So the red light fluorescent powder RP that is mixed in the 4th packing colloid 39 can be a nitride, but the present invention is not as limit.
In an embodiment, what be mixed in that red light fluorescent powder RP in the 4th packing colloid 39 selected for use is nitride.If the part by weight scope of red light fluorescent powder RP (nitride) and the 4th packing colloid 39 is less than 24% or greater than 120%, then red light fluorescent powder RP (nitride) can't be fully converts the monochromatic emission spectrum of the 3rd blue wave band of the 3rd blue chip 36 the monochromatic emission spectrum of red spectral band into.Therefore, preferably, the part by weight scope of red light fluorescent powder RP (nitride) and the 4th packing colloid 39 is between 24% and 120%.In fact, because (Ca, Sr) AlSiN
3: Eu and (Ca, Sr, Ba)
2Si5N
8: Eu can be respectively fully converts the monochromatic emission spectrum of the 3rd blue wave band of the 3rd blue chip 36 the monochromatic emission spectrum of red spectral band into, so the nitride that red light fluorescent powder RP is selected for use can be (Ca, Sr) AlSiN
3: Eu or (Ca, Sr, Ba)
2Si
5N
8: Eu, but the present invention is not as limit.
Also be a kind of light-emitting diode assembly that is applied to liquid crystal indicator according to another preferred embodiment of the present invention.In this embodiment, liquid crystal indicator is a color sequential liquid crystal display or a directly-down liquid crystal display.Liquid crystal indicator comprises liquid crystal panel and backlight module, and backlight module is corresponding to the liquid crystal panel setting.Backlight module comprises framework and LED optical strip, and LED optical strip is disposed in the framework.LED optical strip comprises circuit board and light-emitting diode assembly, and light-emitting diode assembly is disposed on the circuit board.Next, will carry out detailed introduction with regard to the light-emitting diode assembly in the above-mentioned backlight module.
Please with reference to Fig. 4, Fig. 4 is the cross section view of the light-emitting diode assembly among the embodiment.As shown in Figure 4, light-emitting diode assembly 4 comprises substrate 40, cup-like structure 41, first separation structure 42, second separation structure 43, first blue chip 44, second blue chip 45, red light chips 46, first packing colloid 47, second packing colloid 48, the 3rd packing colloid 49 and green light fluorescent powder GP.Cup-like structure 41 is arranged on the substrate 40, and surrounds an accommodation space; First separation structure 42 and second separation structure 43 are arranged in this accommodation space, and first separation structure 42 and second separation structure 43 are separated out the first block S1, the second block S2 and the 3rd block S3 with this accommodation space.Wherein, first blue chip 44 and first packing colloid 47 are arranged in the first block S1; Second blue chip 45 and second packing colloid 48 are arranged in the second block S2, and green light fluorescent powder GP is mixed in second packing colloid 48; Red light chips 46 and the 3rd packing colloid 49 are arranged in the 3rd block S3.
Comparison diagram 4 can be known with Fig. 3; Light-emitting diode assembly 4 among Fig. 4 and the 3 maximum differences of the light-emitting diode assembly among Fig. 3 are: the 3rd packing colloid 49 that is arranged in the 3rd block S3 is not mixed with red light fluorescent powder; And be arranged in the 3rd block S3 is red light chips 46; But not blue chip, therefore, the monochromatic emission spectrum of the red spectral band that red light chips 46 is launched promptly can remain unchanged.
Shown in table; Prove through experiment: the whole efficiency lm/W value of the light-emitting diode assembly 4 among Fig. 4 is 69.9; And the whole efficiency lm/W value of traditional light-emitting diode assembly 20 shown in Figure 2 is merely 43.2; That is the whole efficiency of the light-emitting diode assembly among Fig. 44 traditional light-emitting diode assembly more shown in Figure 2 20 improve about 62% more than, so its effect is quite remarkable.This is owing to adopt second blue chip, 45 collocation green light fluorescent powder GP to replace due to traditional green glow chip in the second block S2 of light-emitting diode assembly 4.
In another preferred embodiment of the present invention; As shown in Figure 5, light-emitting diode assembly 5 comprises substrate 50, cup-like structure 51, separation structure 52, first blue chip 54, second blue chip 55, red light chips 56, first packing colloid 57, second packing colloid 58 and green light fluorescent powder GP.Cup-like structure 51 is to be arranged on the substrate 50, and surrounds an accommodation space; Separation structure 52 is arranged in this accommodation space, and separation structure 52 is separated out the first block S1 and the second block S2 with this accommodation space.Wherein, first blue chip 54, red light chips 56 and first packing colloid 57 are arranged in the first block S1; Second blue chip 55 and second packing colloid 58 are arranged in the second block S2, and green light fluorescent powder GP is mixed in second packing colloid 58.
Comparison diagram 5 can be known with Fig. 4; Light-emitting diode assembly 5 among Fig. 5 and the 4 maximum differences of the light-emitting diode assembly among Fig. 4 are: the accommodation space that cup-like structure 51 is surrounded only is separated into the first block S1 and the second block S2; And first blue chip 54 and red light chips 56 all are arranged in the first block S1; And first packing colloid 57 in the first block S1 is not mixed with red light fluorescent powder, that is still adopts blue light and ruddiness to carry out the mechanism of mixed light in the first block S1, but then is to adopt second blue chip, 55 collocation green light fluorescent powder GP to replace the mode of traditional green glow chip in the second block S2; Can know by table one; About 62% more than through experiment showed, that green glow chip that its whole efficiency can be more traditional improves, its effect is quite remarkable.
In like manner, also can the red light chips in the foregoing description 56 be replaced into the green glow chip, and then be changed to red light fluorescent powder RP in second packing colloid 58 being mixed in.By this; Adopt blue light and green glow to carry out the mechanism of mixed light in the first block S1; But then be to adopt second blue chip, 55 collocation red light fluorescent powder RP to replace the mode of traditional red light chips in the second block S2; Can know by table two, can improve about 50% more than by more traditional red light chips through experiment showed, its thermal stability.
Light-emitting diode assembly of the present invention also is applicable to the mixed type field color gamut display.When the filter of mixed type field color gamut display collocation different colours, light-emitting diode assembly will send accordingly and comprise white light at three kinds of interior light sources.For example, when the mixed type field color gamut display arranged in pairs or groups be green color filter the time, light-emitting diode assembly will send white light, ruddiness and blue light; When the mixed type field color gamut display arranged in pairs or groups be Red lightscreening plate the time, light-emitting diode assembly will send white light, green glow and blue light; When the mixed type field color gamut display arranged in pairs or groups be blue color filter the time, light-emitting diode assembly will send white light, green glow and ruddiness.Next, with through Fig. 6 to Fig. 8 above-mentioned three kinds of different situations being described respectively.
Please with reference to Fig. 6, Fig. 6 is the cross section view of the light-emitting diode assembly of collocation green color filter.As shown in Figure 6, light-emitting diode assembly 6 comprises substrate 60, cup-like structure 61, first separation structure 62, second separation structure 63, first blue chip 64, second blue chip 65, the 3rd blue chip 66, first packing colloid 67, second packing colloid 68, the 3rd packing colloid 69, gold-tinted fluorescent material YP and red light fluorescent powder RP.
In this embodiment, cup-like structure 61 is arranged on the substrate 60, and surrounds an accommodation space; First separation structure 62 and second separation structure 63 are arranged in this accommodation space, and first separation structure 62 and second separation structure 63 are separated out the first block S1, the second block S2 and the 3rd block S3 with this accommodation space.Wherein, first blue chip 64 and first packing colloid 67 are arranged in the first block S1; Second blue chip 65 and second packing colloid 68 are arranged in the second block S2, and gold-tinted fluorescent material YP is mixed in second packing colloid 68; The 3rd blue chip 66 and the 3rd packing colloid 69 are arranged in the 3rd block S3, and red light fluorescent powder RP is mixed in the 3rd packing colloid 69.In present embodiment, the first block S1 can form blue light, and the second block S2 can form white light, and the 3rd block S3 can form ruddiness.By the white light collocation green color filter GF of the second block S2, to form green glow.Therefore, the light-emitting diode assembly collocation local green filter GF with present embodiment can be applicable to the mixed type field color gamut display.
What need explanation is, is mixed in gold-tinted fluorescent material YP in second packing colloid 68 and also can adopts yellow and red fluorescence powder or green and red fluorescence powder replacement, and in other words, fluorescent material and blue chip are arranged in pairs or groups and can be formed white light and get final product.In practical application, gold-tinted fluorescent material YP can be that (Yttrium Aluminum Garnet, YAG), wherein nitride can comprise La for silicate, nitride or yttrium-aluminium-garnet
3Si
6N
11: Ce, but the present invention is not as limit; As for red light fluorescent powder RP then can be nitride, for example (Ca, Sr) AlSiN
3: Eu or (Ca, Sr, Ba)
2Si
5N
8: Eu, but the present invention is not as limit.
First blue chip 64 has the monochromatic emission spectrum of first blue wave band; Second blue chip 65 has the monochromatic emission spectrum of second blue wave band; The 3rd blue chip 66 has the monochromatic emission spectrum of the 3rd blue wave band.First packing colloid 67 is in order to coat and to encapsulate first blue chip 64; Second packing colloid 68 is in order to coat and to encapsulate second blue chip 65; The 3rd packing colloid 69 is in order to coat and to encapsulate the 3rd blue chip 66.
It should be noted that; After the monochromatic emission spectrum that is mixed in second blue wave band of the part that the gold-tinted fluorescent material YP in second packing colloid 68 can be launched second blue chip 65 converts the monochromatic emission spectrum of yellow band into, mix producing white light again with the monochromatic emission spectrum of second blue wave band of another part.Because that light-emitting diode assembly 6 collocation is green color filter GF, therefore, the white light that penetrates from second packing colloid 68 will convert a green glow into through green color filter GF.
In addition, the monochromatic emission spectrum that is mixed in the 3rd blue wave band that the red light fluorescent powder RP in the 3rd packing colloid 69 also can be launched the 3rd blue chip 66 converts the monochromatic emission spectrum of red spectral band fully into; In other words, from the light that the 3rd packing colloid 69 penetrates, its frequency spectrum will concentrate on red spectral band, can not penetrate the blue ray of the monochromatic emission spectrum of original the 3rd blue chip 66 fully.For reaching the conversion fully of spectrum, in preferred embodiment, can the concentration of red light fluorescent powder RP be adjusted to proper range; Or the proportioning components of red light fluorescent powder RP done suitable adjustment.In addition, the also available red light chips of the 3rd blue chip 66 replaces, and produces the monochromatic emission spectrum of a red spectral band.
In this embodiment; The light-emitting diode assembly 6 that is applicable to the mixed type field color gamut display is sent the monochromatic emission spectrum of first blue wave band, second blue wave band and the 3rd blue wave band in regular turn respectively by first blue chip 64, second blue chip 65 and the 3rd blue chip 66 that are arranged at the first block S1, the second block S2 and the 3rd block S3 respectively in the specific time; Wherein the monochromatic emission spectrum of second blue wave band that sent of second blue chip 65 will be mixed in after gold-tinted fluorescent material YP in second packing colloid 68 (or yellow with red fluorescence powder, green and red fluorescence powder) converts the monochromatic emission spectrum of yellow band into, mixes the generation white light with the monochromatic emission spectrum of second blue wave band of another part again.Then, the white light of part will convert the monochromatic emission spectrum of green light band through green color filter GF into.The monochromatic emission spectrum of the 3rd blue light that is sent as for the 3rd blue chip 66 will be mixed in the monochromatic emission spectrum that red light fluorescent powder RP in the 3rd packing colloid 69 converts red spectral band fully into.In addition, the also available red light chips of the 3rd blue chip 66 replaces, and produces the monochromatic emission spectrum of a red spectral band.Because the look preface switch speed between the emission spectrum of first blue wave band, white light, green light band and red spectral band surpasses perception of human eyes frequency (60Hz); So human brain can be because of visual persistence effect with the picture effect superposition to experience full-color picture; And can reduce look by the picture that produces four kinds of colors and separate (Color Break-Up; CBU) phenomenon is to improve the quality of show image.
From the above: the light-emitting diode assembly 6 that is applicable to the mixed type field color gamut display forms white light source through single blue chip collocation yellow fluorescent powder (or yellow and red fluorescence powder, green and red fluorescence powder); And the collocation green color filter converts white light source into green glow; Do not need to drive simultaneously three chips ruddiness, blue light and green glow are mixed into white light; Make the lm/W value of light-emitting diode assembly 6 rise to 80.8～86.9, that is its whole efficiency exceed about 23%～32% than the whole efficiency of the light-emitting diode assembly 6 of Fig. 3.Except whole efficiency significantly improves; Light-emitting diode assembly 6 has also that white light is comparatively stable, production is higher and advantage such as cost reduction, can obtain effective lifting so have the market competitiveness of the mixed type field color gamut display of light-emitting diode assembly 6.
What need explanation is that the light-emitting diode assembly that is applicable to the mixed type field color gamut display 6 of this embodiment needs to arrange in pairs or groups a kind of filter can normal operation.In present embodiment; The filter of mixed type field color gamut display is a green color filter; The filter that promptly has solid color, and green color filter is not to be presented in all sidedly on the filter, only is presented on the filter partly; In other words, green color filter is corresponding to the zone with white light of light-emitting diode assembly 6.Therefore, have the light-emitting diode assembly 6 of white light, can form indigo plant, green, red picture via the collocation of the filter of solid color.So, the inventor is not limited thereto, and can have the light-emitting diode assembly 6 of separation structure according to the filter collocation of the color of different designs, to form the picture of different colours combination.If light-emitting diode assembly of the present invention when desiring to be applied to color sequential liquid crystal display, still must adopt the framework of the light-emitting diode assembly 3～5 that Fig. 3 to Fig. 5 illustrates.Simultaneously; Compare traditional different colours chip (R/G/B or W/R/B etc.) and divide the light-emitting diode assembly that is arranged; The light-emitting diode assembly that utilizes three intervals of this embodiment can reduce the size of light-emitting diode; Under the confined space, can increase a number of light-emitting diode, to improve the luminosity of light-emitting diode.
Then, please with reference to Fig. 7, Fig. 7 is the cross section view of the light-emitting diode assembly of collocation Red lightscreening plate.As shown in Figure 7, light-emitting diode assembly 7 comprises substrate 70, cup-like structure 71, first separation structure 72, second separation structure 73, first blue chip 74, second blue chip 75, the 3rd blue chip 76, first packing colloid 77, second packing colloid 78, the 3rd packing colloid 79, gold-tinted fluorescent material YP and green light fluorescent powder GP.
In this embodiment, cup-like structure 71 is arranged on the substrate 70, and surrounds an accommodation space; First separation structure 72 and second separation structure 73 are arranged in this accommodation space, and first separation structure 72 and second separation structure 73 are separated out the first block S1, the second block S2 and the 3rd block S3 with this accommodation space.In preferred embodiment, first separation structure 72 and second separation structure 73 are thin than the sidewall of cup-like structure 71, therefore can make each block comparatively approaching, to obtain preferable mixed light effect.Wherein, first blue chip 74 and first packing colloid 77 are arranged in the first block S1; Second blue chip 75 and second packing colloid 78 are to be arranged in the second block S2, and gold-tinted fluorescent material YP is mixed in second packing colloid 78; The 3rd blue chip 76 and the 3rd packing colloid 79 are arranged in the 3rd block S3, and green light fluorescent powder GP is mixed in the 3rd packing colloid 79.In present embodiment, the first block S1 can form blue light, and the second block S2 can form white light, and the 3rd block S3 can form green glow.By the white light collocation Red lightscreening plate RF of the second block S2, to form ruddiness.Therefore, the light-emitting diode assembly collocation local green filter GF with present embodiment can be applicable to the mixed type field color gamut display.What need explanation is, is mixed in gold-tinted fluorescent material YP in second packing colloid 78 and also can adopts yellow and red fluorescence powder or green and red fluorescence powder replacement, and in other words, the blue chip fluorescent material of arranging in pairs or groups can form white light and gets final product.
It should be noted that; After the monochromatic emission spectrum that is mixed in second blue wave band of the part that the gold-tinted fluorescent material YP in second packing colloid 78 can be launched second blue chip 75 converts the monochromatic emission spectrum of yellow band into, mix producing white light again with the monochromatic emission spectrum of second blue wave band of another part.Because that light-emitting diode assembly 7 collocation is Red lightscreening plate RF, therefore, the white light that penetrates from second packing colloid 78 will convert a ruddiness into through Red lightscreening plate RF.
In addition, the monochromatic emission spectrum that is mixed in the 3rd blue wave band that the green light fluorescent powder GP in the 3rd packing colloid 79 also can be launched the 3rd blue chip 76 converts the monochromatic emission spectrum of green light band fully into; In other words, from the light that the 3rd packing colloid 79 penetrates, its frequency spectrum will concentrate on green light band, can not penetrate the blue ray of the monochromatic emission spectrum of original the 3rd blue chip 76 fully.For reaching the conversion fully of spectrum, in preferred embodiment, can the concentration of green light fluorescent powder GP be adjusted to proper range; Or the proportioning components of green light fluorescent powder GP done suitable adjustment.
In fact; Green light fluorescent powder GP can be silicate (silicate), nitrogen oxide (oxynitride), gold-plating aluminum oxide (lutetium aluminum oxide), sulfide (Sulfide) or calcium scandium oxide (calciumscandium oxide), but the present invention is not as limit.Wherein, silicate can comprise (Ca, Sr, Ba)
2SiO
4: Eu; Nitrogen oxide can comprise β-SiAlON:Eu; The gold-plating aluminum oxide can comprise Lu
3Al
5O
12: Ce; Sulfide can comprise (Ca, Sr, Ba) Ga
2S
4: Eu; Calcium scandium oxide can comprise CaSc
2O
4: Ce.
In this embodiment; The light-emitting diode assembly 7 that is applicable to the mixed type field color gamut display is sent the monochromatic emission spectrum of first blue wave band, second blue wave band and the 3rd blue wave band in regular turn respectively by first blue chip 74, second blue chip 75 and the 3rd blue chip 76 that are arranged at the first block S1, the second block S2 and the 3rd block S3 respectively in the specific time; Wherein the monochromatic emission spectrum of second blue wave band that sent of second blue chip 75 will be mixed in after gold-tinted fluorescent material YP in second packing colloid 78 (or yellow with red fluorescence powder, green and red fluorescence powder) converts white light emission spectrum into, and white light partly will convert the monochromatic emission spectrum of red spectral band through Red lightscreening plate RF into.The monochromatic emission spectrum of the 3rd blue light that is sent as for the 3rd blue chip 76 will be mixed in the monochromatic emission spectrum that green light fluorescent powder GP in the 3rd packing colloid 79 converts green light band fully into.Because the look preface switch speed between the emission spectrum of first blue wave band, white light, red spectral band and green light band surpasses perception of human eyes frequency (60Hz); So human brain can be because of visual persistence effect with the picture effect superposition to experience full-color picture; And can reduce look by the picture that produces four kinds of colors and separate (Color Break-Up; CBU) phenomenon is to improve the quality of show image.
In present embodiment; The filter of mixed type field color gamut display is a Red lightscreening plate; The filter that promptly has solid color, and Red lightscreening plate is not to be presented in all sidedly on the filter, only is presented on the filter partly; In other words, Red lightscreening plate is corresponding to the zone with white light of light-emitting diode assembly 6.Therefore, have the light-emitting diode assembly 6 of white light, can form indigo plant, green, red picture via the collocation of the filter of solid color.So, the invention is not restricted to this, can have the light-emitting diode assembly 7 of separation structure according to the filter collocation of the color of different designs, to form the picture of different colours combination.
Also please with reference to Fig. 8, Fig. 8 is the cross section view of the light-emitting diode assembly of collocation blue color filter.As shown in Figure 8, light-emitting diode assembly 8 comprises substrate 80, cup-like structure 81, first separation structure 82, second separation structure 83, first blue chip 84, second blue chip 85, the 3rd blue chip 86, first packing colloid 87, second packing colloid 88, the 3rd packing colloid 89, gold-tinted fluorescent material YP and green light fluorescent powder GP.
In this embodiment, cup-like structure 81 is arranged on the substrate 80, and surrounds an accommodation space; First separation structure 82 and second separation structure 83 are arranged in this accommodation space, and first separation structure 82 and second separation structure 83 are separated out the first block S1, the second block S2 and the 3rd block S3 with this accommodation space.In preferred embodiment, first separation structure 82 and second separation structure 83 are thin than the sidewall of cup-like structure 81, therefore can make each block comparatively approaching, to obtain preferable mixed light effect.Wherein, first blue chip 84 and first packing colloid 87 are arranged in the first block S1, and red fluorescence powder RP is mixed in first packing colloid 87; Second blue chip 85 and second packing colloid 88 are to be arranged in the second block S2, and gold-tinted fluorescent material YP is mixed in second packing colloid 88; The 3rd blue chip 86 and the 3rd packing colloid 89 are arranged in the 3rd block S3, and green light fluorescent powder GP is mixed in the 3rd packing colloid 89.In present embodiment, the first block S1 can form ruddiness, and the second block S2 can form white light, and the 3rd block S3 can form green glow.By the white light collocation blue color filter BF of the second block S2, to form blue light.Therefore, with the light-emitting diode assembly of the present embodiment local blue color filter BF that arranges in pairs or groups, can be applicable to the mixed type field color gamut display.What need explanation is that the gold-tinted fluorescent material YP that is mixed in second packing colloid 88 also can adopt yellow and red fluorescence powder or green and red fluorescence powder replacement.
It should be noted that; After the monochromatic emission spectrum that is mixed in second blue wave band of the part that the gold-tinted fluorescent material YP in second packing colloid 88 can be launched second blue chip 85 converts the monochromatic emission spectrum of yellow band into, mix producing white light again with the monochromatic emission spectrum of second blue wave band of another part.Because that light-emitting diode assembly 8 collocation is blue color filter BF, therefore, the white light that penetrates from second packing colloid 88 will convert a blue light into through blue color filter BF.
In addition; The monochromatic emission spectrum that is mixed in first blue wave band that the red fluorescence powder RP in first packing colloid 87 can be launched first blue chip 84 converts the monochromatic emission spectrum of red spectral band fully into, and the monochromatic emission spectrum that is mixed in the 3rd blue wave band that the green light fluorescent powder GP in the 3rd packing colloid 89 also can be launched the 3rd blue chip 86 converts the monochromatic emission spectrum of green light band fully into.In other words; Light from 87 ejaculations of first packing colloid; Its frequency spectrum will concentrate on red spectral band, can not penetrate the blue ray of the monochromatic emission spectrum of original first blue chip 84 fully, and the light that penetrates from the 3rd packing colloid 89; Its frequency spectrum will concentrate on green light band, can not penetrate the blue ray of the monochromatic emission spectrum of original the 3rd blue chip 86 fully.For reaching the conversion fully of spectrum, in preferred embodiment, can the concentration of red fluorescence powder RP and green light fluorescent powder GP be adjusted to proper range; Or the proportioning components of red fluorescence powder RP and green light fluorescent powder GP done suitable adjustment.In addition, the also available red light chips of first blue chip 84 replaces, and produces the monochromatic emission spectrum of a red spectral band.
In this embodiment; The light-emitting diode assembly 8 that is applicable to the mixed type field color gamut display is sent the monochromatic emission spectrum of first blue wave band, second blue wave band and the 3rd blue wave band in regular turn respectively by first blue chip 84, second blue chip 85 and the 3rd blue chip 86 that are arranged at the first block S1, the second block S2 and the 3rd block S3 respectively in the specific time; Wherein the monochromatic emission spectrum of second blue wave band of the part sent of second blue chip 85 will be mixed in after gold-tinted fluorescent material YP in second packing colloid 88 (or yellow with red fluorescence powder, green and red fluorescence powder) converts the monochromatic emission spectrum of yellow band into, mixes the generation white light with the monochromatic emission spectrum of second blue wave band of another part again.Then, the white light of part will convert the monochromatic emission spectrum of blue wave band through blue color filter BF into.The monochromatic emission spectrum of first blue light that is sent as for first blue chip 84 will be mixed in the monochromatic emission spectrum that red light fluorescent powder RP in first packing colloid 87 converts red spectral band fully into, and the monochromatic emission spectrum of the 3rd blue light that sent of the 3rd blue chip 86 will be mixed in the monochromatic emission spectrum that green light fluorescent powder GP in the 3rd packing colloid 89 converts green light band fully into.In addition, the also available red light chips of first blue chip 84 replaces, and produces the monochromatic emission spectrum of a red spectral band.Because the look preface switch speed between the monochromatic emission spectrum of red spectral band, blue wave band and green light band surpasses perception of human eyes frequency (60Hz); So human brain can be because of visual persistence effect with the picture effect superposition to experience full-color picture; And can reduce the look segregation phenomenon by the picture that produces four kinds of colors, to improve the quality of show image.
In present embodiment; The filter of mixed type field color gamut display is a blue color filter; The filter that promptly has solid color, and blue color filter is not to be presented in all sidedly on the filter, only is presented on the filter partly; In other words, blue color filter is corresponding to the zone with white light of light-emitting diode assembly 8.Therefore, have the light-emitting diode assembly 8 of white light, can form indigo plant, green, red picture via the collocation of the filter of solid color.So, the inventor is not limited thereto, and can have the light-emitting diode assembly 8 of separation structure according to the filter collocation of the color of different designs, to form the picture of different colours combination.
What need explanation is; Though the second block S2 in the middle of the light-emitting diode assembly 6～8 that Fig. 6 to Fig. 8 illustrated is and is positioned at forms white light, yet, in practical application; Light-emitting diode assembly of the present invention also can form white light by the first block S 1 or the 3rd block S3, does not exceed with this example.
Compared to prior art; Light-emitting diode assembly in the liquid crystal indicator that the present invention disclosed forms green monochromatic source or red monochromatic source through blue chip collocation fluorescent material; Reduce the property difference between three kinds of different color light chips of traditional light-emitting diode assembly effectively; Because the efficient of the formed green monochromatic source of blue chip collocation fluorescent material is come highly far beyond traditional green glow chip; And the also more traditional red light chips excellence of the thermal stability of the formed red monochromatic source of blue chip collocation fluorescent material; Therefore, the whole efficiency of light-emitting diode assembly of the present invention also is superior to the light-emitting diode assembly that tradition has three kinds of different color light chips significantly.In addition; The present invention also discloses the light-emitting diode assembly that is applicable to mixed type field colour gamut display unit; It forms white light source through single blue chip collocation fluorescent material, and the white light source that collocation is red, blueness or green color filter will parts converts ruddiness, blue light or green glow into, does not need to drive simultaneously three chips ruddiness, blue light and green glow are mixed into white light; So can significantly improve the efficient of light-emitting diode assembly; And (Color Break-Up, CBU) phenomenon is to improve the quality of show image to reduce the look separation by the picture that produces four kinds of colors.In addition, light-emitting diode assembly of the present invention also has that white light is comparatively stable, production is higher and advantage such as cost reduction, makes the market competitiveness of liquid crystal indicator with above-mentioned light-emitting diode assembly can obtain effective lifting.
Certainly; The present invention also can have other various embodiments; Under the situation that does not deviate from spirit of the present invention and essence thereof; Those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (24)
1. a light-emitting diode assembly is characterized in that, comprises:
One substrate;
One cup-like structure is arranged on this substrate, and surrounds an accommodation space; And
One separation structure is arranged in this accommodation space, and this accommodation space is separated out one first block and one second block;
Wherein, be provided with one first blue chip and one first packing colloid in this first block, this first blue chip has the monochromatic emission spectrum of one first blue wave band; This first packing colloid coats and encapsulates this first blue chip;
Be provided with one second blue chip and one second packing colloid in this second block, this second blue chip has the monochromatic emission spectrum of one second blue wave band; This second packing colloid coats and encapsulates this second blue chip, is mixed with a green light fluorescent powder in this second packing colloid, and this green light fluorescent powder converts the monochromatic emission spectrum of this second blue wave band into the monochromatic emission spectrum of one green light band fully;
Wherein, this green light fluorescent powder be selected from a silicate, a nitrogen oxide, a gold-plating aluminum oxide and a calcium scandium oxide one of them.
2. light-emitting diode assembly as claimed in claim 1 is characterized in that, when this green light fluorescent powder was selected this silicate for use, the part by weight scope of this green light fluorescent powder and this second packing colloid was between 80% and 160%.
3. light-emitting diode assembly as claimed in claim 1 is characterized in that, this silicate comprise (Ca, Sr, Ba)
2SiO
4: Eu.
4. light-emitting diode assembly as claimed in claim 1 is characterized in that, when this green light fluorescent powder was selected this nitrogen oxide for use, the part by weight scope of this green light fluorescent powder and this second packing colloid was between 90% and 180%.
5. light-emitting diode assembly as claimed in claim 1 is characterized in that this nitrogen oxide comprises β-SiAlON:Eu.
6. light-emitting diode assembly as claimed in claim 1 is characterized in that when this green light fluorescent powder was selected this gold-plating aluminum oxide for use, the part by weight scope of this green light fluorescent powder and this second packing colloid was between 80% and 160%.
7. light-emitting diode assembly as claimed in claim 1 is characterized in that, this gold-plating aluminum oxide comprises Lu
3Al
5O
12: Ce.
8. light-emitting diode assembly as claimed in claim 1 is characterized in that, when this green light fluorescent powder was selected this calcium scandium oxide for use, the part by weight scope of this green light fluorescent powder and this second packing colloid was between 90% and 180%.
9. light-emitting diode assembly as claimed in claim 1 is characterized in that, this calcium scandium oxide comprises CaSc
2O
4: Ce.
10. light-emitting diode assembly as claimed in claim 1; It is characterized in that; Be provided with one first red light chips in this first block in addition; This first red light chips has the monochromatic emission spectrum of one first red spectral band, and this first packing colloid coats and encapsulate this first blue chip and this first red light chips.
11. light-emitting diode assembly as claimed in claim 1 is characterized in that, this separation structure is separated out one the 3rd block with this accommodation space in addition.
12. light-emitting diode assembly as claimed in claim 11 is characterized in that, is provided with in the 3rd block:
One second red light chips, this second red light chips has the monochromatic emission spectrum of one second red spectral band; And
One the 3rd packing colloid is in order to coat and to encapsulate this second red light chips.
13. light-emitting diode assembly as claimed in claim 11 is characterized in that, is provided with in the 3rd block:
One the 3rd blue chip, the 3rd blue chip have the monochromatic emission spectrum of one the 3rd blue wave band; And
One the 4th packing colloid in order to coat and to encapsulate the 3rd blue chip, is mixed with a red light fluorescent powder in the 4th packing colloid, this red light fluorescent powder converts the monochromatic emission spectrum of the 3rd blue wave band into the monochromatic emission spectrum of one red spectral band fully;
Wherein, this red light fluorescent powder is selected nitride for use.
14. light-emitting diode assembly as claimed in claim 13 is characterized in that, when this red light fluorescent powder was selected this nitride for use, the part by weight scope of this red light fluorescent powder and the 3rd packing colloid was between 24% and 120%.
15. light-emitting diode assembly as claimed in claim 13 is characterized in that, this nitride comprises (Ca, Sr) AlSiN
3: Eu or (Ca, Sr, Ba)
2Si
5N
8: Eu.
16. a light-emitting diode assembly is characterized in that, comprises:
One substrate;
One cup-like structure is arranged on this substrate, and surrounds an accommodation space; And
One separation structure is arranged in this accommodation space, and this accommodation space is separated out one first block and one second block;
Wherein, be provided with one first blue chip and one first packing colloid in this first block, this first blue chip has the monochromatic emission spectrum of one first blue wave band; This first packing colloid coats and encapsulates this first blue chip;
Be provided with one second blue chip and one second packing colloid in this second block, this second blue chip has the monochromatic emission spectrum of one second blue wave band; This second packing colloid coats and encapsulates this second blue chip, is mixed with a fluorescent material in this second packing colloid, and this fluorescent material converts the monochromatic emission spectrum of this second blue wave band into a white light emission spectrum.
17. light-emitting diode assembly as claimed in claim 16 is characterized in that, this separation structure is separated out one the 3rd block with this accommodation space in addition, is provided with in the 3rd block:
One the 3rd blue chip, the 3rd blue chip have the monochromatic emission spectrum of one the 3rd blue wave band;
One the 3rd packing colloid is in order to coat and to encapsulate the 3rd blue chip; And
One redness or green emitting phosphor; Be arranged in the 3rd packing colloid, and this red fluorescence powder converts the monochromatic emission spectrum of the 3rd blue wave band into the monochromatic emission spectrum of a red spectral band or the monochromatic emission spectrum that this green emitting phosphor converts the monochromatic emission spectrum of the 3rd blue wave band into one green light band fully fully.
18. light-emitting diode assembly as claimed in claim 16 is characterized in that, this separation structure is separated out one the 3rd block with this accommodation space in addition, is provided with in the 3rd block:
One the 3rd blue chip, the 3rd blue chip have the monochromatic emission spectrum of one the 3rd blue wave band;
One the 3rd packing colloid is in order to coat and to encapsulate the 3rd blue chip;
One red fluorescence powder is arranged in the 3rd packing colloid, and this red fluorescence powder converts the monochromatic emission spectrum of the 3rd blue wave band into the monochromatic emission spectrum of one red spectral band fully; And
One green emitting phosphor is arranged in this first packing colloid, and this green emitting phosphor converts the monochromatic emission spectrum of this first blue wave band into the monochromatic emission spectrum of one green light band fully.
19. light-emitting diode assembly as claimed in claim 16 is characterized in that, this fluorescent material be selected from a yellow fluorescent powder, yellow and a red fluorescence powder and green and a red fluorescence powder one of them.
20. a field sequence displayer is characterized in that, comprises:
One display module has the filter of solid color; And
One backlight module has a plurality of light-emitting diode assemblies, and wherein this light-emitting diode assembly comprises a substrate, a cup-like structure and a separation structure; This cup-like structure is arranged on this substrate, and surrounds an accommodation space; This separation structure is arranged in this accommodation space, and this accommodation space is separated out a plurality of blocks, and one first block in these a plurality of blocks forms a white light, and this first block is corresponding to the filter of this solid color.
21. as claimed in claim 20 sequence displayer is characterized in that the filter part of this solid color has color.
22. as claimed in claim 20 sequence displayer; It is characterized in that; The filter of this solid color is a green color filter, does not form a blue light and a ruddiness respectively corresponding to one second block and one the 3rd block of the filter of this solid color in these a plurality of blocks.
23. as claimed in claim 20 sequence displayer; It is characterized in that; The filter of this solid color is a Red lightscreening plate, does not form a blue light and a green glow respectively corresponding to one second block and one the 3rd block of the filter of this solid color in these a plurality of blocks.
24. as claimed in claim 20 sequence displayer; It is characterized in that; The filter of this solid color is a blue color filter, does not form a ruddiness and a green glow respectively corresponding to one second block and one the 3rd block of the filter of this solid color in these a plurality of blocks.
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| TW99134705 | 2010-10-12 | ||
| CN201010529232.8 | 2010-10-22 |
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|---|---|---|---|
| CN2011103173969A Expired - Fee Related CN102427075B (en) | 2010-10-12 | 2011-10-12 | Light emitting diode device and field sequence display |
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