CN102427075B - Light emitting diode device and field sequence display - Google Patents
Light emitting diode device and field sequence display Download PDFInfo
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- CN102427075B CN102427075B CN2011103173969A CN201110317396A CN102427075B CN 102427075 B CN102427075 B CN 102427075B CN 2011103173969 A CN2011103173969 A CN 2011103173969A CN 201110317396 A CN201110317396 A CN 201110317396A CN 102427075 B CN102427075 B CN 102427075B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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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 by 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, (Liquid Crystal Display LCD) is sure to occupy the main flow of plane Display Technique to LCD far and away.In various LCD, 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 order 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, be example with direct type backlight module shown in Figure 1, the formation of its color is according to redness (R) light source 10 in the sequential switching light-emitting diode (LED) backlight module (LED Backlight Module) 1, green (G) light source 12 and blue (B) light source 14, collocation shows the liquid crystal pixel penetrance of time inter-sync control in each color light source, to allocate the relative light quantity of each primary colors, got by the integral action of vision system photic stimuli again.Because the light that light-emitting diode sends has the spectral characteristic of narrow halfwidth, can present 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 refer 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 in regular turn 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 surrounds, recycling ruddiness, green glow and blue light carry out colour mixture, because the speed that the look order 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 following advantage: (1) need not use colored filter, 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 is conducive to improve panel pixel makes panel pixel have high-resolution; (4) present 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 simultaneously, green light LED chip 202 and blue LED chip 204, because red light-emitting diode chip 200, the light-emitting diode chip for backlight unit of 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, easily cause heat to decline and phenomenon such as colour cast, seriously influence 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 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 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 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 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 is converted to the monochromatic emission spectrum of the 3rd blue wave band 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, be converted to the white light emission spectrum fully in order to the 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, be converted to the monochromatic emission spectrum of red spectral band fully in order to the 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 be converted to green glow by green color filter.
In an embodiment, can be mixed with green light fluorescent powder in above-mentioned the 3rd packing colloid, be converted to the monochromatic emission spectrum of green light band fully in order to the 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 be converted to ruddiness by 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 is converted to the monochromatic emission spectrum of red spectral band fully with the monochromatic emission spectrum of first blue wave band, and green light fluorescent powder is converted to the monochromatic emission spectrum of the 3rd blue wave band 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 be converted to blue light by 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 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 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 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 disclosed liquid crystal indicator of the present invention forms green monochromatic source or red monochromatic source by 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 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 better than 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 by single blue chip collocation fluorescent material, and collocation redness, blueness or green color filter are converted to ruddiness, blue light or green glow with white light source partly, do 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 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 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 the drawings and specific embodiments, but not as a limitation of the 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 schematic diagram;
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 the drawings and specific embodiments technical solution of the present invention being described in detail, further understanding purpose of the present invention, scheme and effect, but is not the restriction as 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 by 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 be described in detail with regard to the light-emitting diode assembly in the above-mentioned backlight module.
Please refer 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 launch second blue chip 35 is converted to the monochromatic emission spectrum of green light band fully; 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, the concentration of green light fluorescent powder GP can 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 launch the 3rd blue chip 36 is converted to the monochromatic emission spectrum of red spectral band fully; 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, the concentration of red light fluorescent powder RP can 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 adopts the 3rd blue chip 36 collocation red light fluorescent powder RP to replace traditional red light chips in the 3rd block S3.Please refer to table one, table one is listed the experimental data of the whole efficiency of the light-emitting diode assembly that Fig. 2～Fig. 4 illustrates respectively.As shown in Table 1, the experiment proved that: 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 only is 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 refers to output light flux/input electric power, and unit is lm/W, in order to the white light efficient behind three kinds of light sources compositions of comparison RGB white light, that is the white light power of relatively forming.
Table two
Please refer 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.As shown in Table 2, the experiment proved that: 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 better than 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 refers to relative intensity slippage/environment ascending temperature, unit be %/℃.For 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 in the specific time by being arranged at the first block S1 respectively, first blue chip 34 of the second block S2 and the 3rd block S3, second blue chip 35 and the 3rd blue chip 36 send first blue wave band in regular turn respectively, the monochromatic emission spectrum of second blue wave band and the 3rd blue wave band, wherein the monochromatic emission spectrum of second blue wave band that sends of second blue chip 35 will be mixed in the monochromatic emission spectrum that green light fluorescent powder GP in second packing colloid 38 is converted to green light band fully, and the monochromatic emission spectrum of the 3rd blue light that the 3rd blue chip 36 sends will be mixed in the monochromatic emission spectrum that red light fluorescent powder RP in the 4th packing colloid 39 is converted to red spectral band fully.Because the look order 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 to 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, be mixed in green light fluorescent powder GP in second packing colloid 38 selected be 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35.Therefore, preferably, the part by weight scope of 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35, thus the selected silicate of green light fluorescent powder GP can comprise (Ca, Sr, Ba)
2SiO
4: Eu, but the present invention is not as limit.
In another embodiment, be mixed in green light fluorescent powder GP in second packing colloid 38 selected be 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35.Therefore, preferably, the part by weight scope of 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 fully the monochromatic emission spectrum of second blue wave band of second blue chip 35 is converted to the monochromatic emission spectrum of green light band, so the selected nitrogen oxide of green light fluorescent powder GP can comprise β-SiAlON:Eu, but the present invention is not as limit.
In another embodiment, be mixed in green light fluorescent powder GP in second packing colloid 38 selected be 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35.Therefore, preferably, the part by weight scope of 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35, so the selected gold-plating aluminum oxide of green light fluorescent powder GP can comprise Lu
3Al
5O
12: Ce, but the present invention is not as limit.
In another embodiment, be mixed in green light fluorescent powder GP in second packing colloid 38 selected be 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35.Therefore, preferably, the part by weight scope of 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 be converted to the monochromatic emission spectrum of green light band with the monochromatic emission spectrum of second blue wave band of second blue chip 35, so the selected gold-plating aluminum oxide of green light fluorescent powder GP can comprise CaSc
2O
4: Ce, but the present invention is not as limit.
In practical application, because nitride (nitride) can be fully the monochromatic emission spectrum of the 3rd blue wave band of the 3rd blue chip 36 is converted to the monochromatic emission spectrum of red spectral band, so the red light fluorescent powder RP that is mixed in the 4th packing colloid 39 can be nitride, but the present invention is not as limit.
In an embodiment, be mixed in red light fluorescent powder RP in the 4th packing colloid 39 selected be 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 be converted to the monochromatic emission spectrum of red spectral band with the monochromatic emission spectrum of the 3rd blue wave band of the 3rd blue chip 36.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 be converted to the monochromatic emission spectrum of red spectral band with the monochromatic emission spectrum of the 3rd blue wave band of the 3rd blue chip 36, so the selected nitride of red light fluorescent powder RP 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 be described in detail with regard to the light-emitting diode assembly in the above-mentioned backlight module.
Please refer 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 and Fig. 3 are as can be known, light-emitting diode assembly 4 among Fig. 4 and the difference of light-emitting diode assembly 3 maximums 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 launched of red light chips 46 namely can remain unchanged.
As shown in Table 1, the experiment proved that: 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 only is 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 and Fig. 4 are as can be known, light-emitting diode assembly 5 among Fig. 5 and the difference of light-emitting diode assembly 4 maximums among Fig. 4 are: the accommodation space that cup-like structure 51 surrounds 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 adopt blue light and ruddiness to carry out the mechanism of mixed light in the first block S1, but then be 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, as shown in Table 1, the experiment proved that, its whole efficiency can be more traditional the green glow chip improve approximately 62% more than, its effect is quite remarkable.
In like manner, also the red light chips 56 in above-described embodiment can be replaced into the green glow chip, and then be changed to red light fluorescent powder RP being mixed in second packing colloid 58.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, as shown in Table 2, the experiment proved that its thermal stability can improve about 50% more than by more traditional red light chips.
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 arrange 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 arrange 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 arrange in pairs or groups be blue color filter the time, light-emitting diode assembly will send white light, green glow and ruddiness.Next, will by Fig. 6 to Fig. 8 above-mentioned three kinds of different situations be described respectively.
Please refer 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.
It should be noted that, be mixed in gold-tinted fluorescent material YP in second packing colloid 68 and also can adopt yellow and red fluorescence powder or greenly replace it with red fluorescence powder that 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; Then can be nitride, for example (Ca, Sr) AlSiN as for red light fluorescent powder RP
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 launch second blue chip 65 is converted to the monochromatic emission spectrum of yellow band, 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 be converted to a green glow by 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 launch the 3rd blue chip 66 is converted to the monochromatic emission spectrum of red spectral band fully; 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, the concentration of red light fluorescent powder RP can be adjusted to proper range; Or the proportioning components of red light fluorescent powder RP done suitable adjustment.In addition, the 3rd blue chip 66 an also available red light chips 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 in the specific time by being arranged at the first block S1 respectively, first blue chip 64 of the second block S2 and the 3rd block S3, second blue chip 65 and the 3rd blue chip 66 send first blue wave band in regular turn respectively, the monochromatic emission spectrum of second blue wave band and the 3rd blue wave band, wherein the monochromatic emission spectrum of second blue wave band that sends of second blue chip 65 will be mixed in gold-tinted fluorescent material YP (or yellow and the red fluorescence powder in second packing colloid 68, green and red fluorescence powder) be converted to the monochromatic emission spectrum of yellow band after, mix producing white light again with the monochromatic emission spectrum of second blue wave band of another part.Then, Bu Fen white light will be converted to the monochromatic emission spectrum of green light band by green color filter GF.The monochromatic emission spectrum of the 3rd blue light that sends 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 is converted to red spectral band fully.In addition, the 3rd blue chip 66 an also available red light chips replaces, and produces the monochromatic emission spectrum of a red spectral band.Because the look order 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 by single blue chip collocation yellow fluorescent powder (or yellow and red fluorescence powder, green and red fluorescence powder), and the collocation green color filter is converted to green glow with white light source, 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.
It should be noted 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 green color filter, the filter that namely has solid color, and green color filter is not to be presented in all sidedly on the filter, only be 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 via the collocation of the filter of solid color, can form indigo plant, green, red picture.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 refer 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.It should be noted that, be mixed in gold-tinted fluorescent material YP in second packing colloid 78 and also can adopt yellow and red fluorescence powder or greenly replace it with red fluorescence powder that 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 launch second blue chip 75 is converted to the monochromatic emission spectrum of yellow band, 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 be converted to a ruddiness by 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 launch the 3rd blue chip 76 is converted to the monochromatic emission spectrum of green light band fully; 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, the concentration of green light fluorescent powder GP can 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 in the specific time by being arranged at the first block S1 respectively, first blue chip 74 of the second block S2 and the 3rd block S3, second blue chip 75 and the 3rd blue chip 76 send first blue wave band in regular turn respectively, the monochromatic emission spectrum of second blue wave band and the 3rd blue wave band, wherein the monochromatic emission spectrum of second blue wave band that sends of second blue chip 75 will be mixed in gold-tinted fluorescent material YP (or yellow and the red fluorescence powder in second packing colloid 78, green and red fluorescence powder) be converted to the white light emission spectrum after, the white light of part will be converted to the monochromatic emission spectrum of red spectral band by Red lightscreening plate RF.The monochromatic emission spectrum of the 3rd blue light that sends 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 is converted to green light band fully.Because the look order 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 Red lightscreening plate, the filter that namely has solid color, and Red lightscreening plate is not to be presented in all sidedly on the filter, only be 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 via the collocation of the filter of solid color, can form indigo plant, green, red picture.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 refer 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.It should be noted that, be mixed in that gold-tinted fluorescent material YP in second packing colloid 88 also can adopt yellow and red fluorescence powder or green and red fluorescence powder replaces it.
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 launch second blue chip 85 is converted to the monochromatic emission spectrum of yellow band, 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 be converted to a blue light by 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 launch first blue chip 84 is converted to the monochromatic emission spectrum of red spectral band fully, 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 launch the 3rd blue chip 86 is converted to the monochromatic emission spectrum of green light band fully.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 from 89 ejaculations of the 3rd packing colloid, 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, the concentration of red fluorescence powder RP and green light fluorescent powder GP can 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, first blue chip 84 an also available red light chips 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 in the specific time by being arranged at the first block S1 respectively, first blue chip 84 of the second block S2 and the 3rd block S3, second blue chip 85 and the 3rd blue chip 86 send first blue wave band in regular turn respectively, the monochromatic emission spectrum of second blue wave band and the 3rd blue wave band, wherein the monochromatic emission spectrum of second blue wave band of the part sent of second blue chip 85 will be mixed in gold-tinted fluorescent material YP (or yellow and the red fluorescence powder in second packing colloid 88, green and red fluorescence powder) be converted to the monochromatic emission spectrum of yellow band after, mix producing white light again with the monochromatic emission spectrum of second blue wave band of another part.Then, Bu Fen white light will be converted to the monochromatic emission spectrum of blue wave band by blue color filter BF.The monochromatic emission spectrum of first blue light that sends 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 is converted to red spectral band fully, and the monochromatic emission spectrum of the 3rd blue light that sends 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 is converted to green light band fully.In addition, first blue chip 84 an also available red light chips replaces, and produces the monochromatic emission spectrum of a red spectral band.Because the look order 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 blue color filter, the filter that namely has solid color, and blue color filter is not to be presented in all sidedly on the filter, only be 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 via the collocation of the filter of solid color, can form indigo plant, green, red picture.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.
It should be noted that, though the second block S2 in the middle of the light-emitting diode assembly 6～8 that Fig. 6 to Fig. 8 illustrates 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, is not limited with this example.
Compared to prior art, light-emitting diode assembly in the disclosed liquid crystal indicator of the present invention forms green monochromatic source or red monochromatic source by 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 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 better than 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 by single blue chip collocation fluorescent material, and collocation redness, blueness or green color filter are converted to ruddiness, blue light or green glow with white light source partly, do 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 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 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 (9)
1. light-emitting diode assembly, the filter that is used for collocation one solid color constitutes the mixed type field color gamut display, it 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 is converted to a white light emission spectrum with the monochromatic emission spectrum of this second blue wave band.
2. 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, 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 is converted to the monochromatic emission spectrum of a red spectral band or the monochromatic emission spectrum that this green emitting phosphor is converted to the monochromatic emission spectrum of the 3rd blue wave band one green light band fully fully with the monochromatic emission spectrum of the 3rd blue wave band.
3. 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, 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 is converted to the monochromatic emission spectrum of the 3rd blue wave band 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 is converted to the monochromatic emission spectrum of this first blue wave band the monochromatic emission spectrum of one green light band fully.
4. light-emitting diode assembly as claimed in claim 1 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.
5. 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.
6. as claimed in claim 5 sequence displayer is characterized in that the filter part of this solid color has color.
7. sequence displayer as claimed in claim 5, 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.
8. sequence displayer as claimed in claim 5, 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.
9. sequence displayer as claimed in claim 5, 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 | ||
| TW099134705 | 2010-10-12 | ||
| CN201010529232.8 | 2010-10-22 |
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| CN102427075A CN102427075A (en) | 2012-04-25 |
| CN102427075B true CN102427075B (en) | 2013-08-21 |
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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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