CN1763606A - Module backlight and the liquid crystal display that uses this module backlight - Google Patents
Module backlight and the liquid crystal display that uses this module backlight Download PDFInfo
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- CN1763606A CN1763606A CNA2005101094011A CN200510109401A CN1763606A CN 1763606 A CN1763606 A CN 1763606A CN A2005101094011 A CNA2005101094011 A CN A2005101094011A CN 200510109401 A CN200510109401 A CN 200510109401A CN 1763606 A CN1763606 A CN 1763606A
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- 230000005540 biological transmission Effects 0.000 claims description 8
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 7
- 235000013351 cheese Nutrition 0.000 claims description 2
- 230000005142 aphototropism Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
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- 238000003199 nucleic acid amplification method Methods 0.000 description 2
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133613—Direct backlight characterized by the sequence of light sources
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a kind of module backlight and a kind of liquid crystal display (LCD) equipment that uses this module backlight that comprises a plurality of light-emitting devices unit, a plurality of light-emitting devices unit is arranged with different arrangement pitch, the light-emitting device unit at the edge of base plate than locate to arrange therebetween crypto set more.Design this module backlight and be used to prevent on the angle, thereby the brightness uniformity of raising is provided owing to the generation that lacks the dark part that light quantity causes.
Description
Technical field
General plotting of the present invention relates to a kind of module backlight and a kind of liquid crystal display (LCD) equipment that uses this module backlight, more particularly, relates to a kind of down straight aphototropism mode set and a kind of LCD equipment that uses this module backlight.
Background technology
LCD is a kind of non-emission flat panel display, so because not luminous its of LCD itself needs external light source to produce image.Therefore, module backlight is arranged on the rear portion of LCD and luminous.
The position of arranging within it according to the light source of module backlight is divided into down straight aphototropism mode set and side-light type module backlight with module backlight.For down straight aphototropism mode set, a plurality of light sources that are arranged on below the LCD are transmitted into light on the LCD screen.For side-light type module backlight, by LGP light is transmitted on the LCD screen along the light source of the sidewall setting of light guide plate (LGP).
Down straight aphototropism mode set can use the light emitting diode (LED) of emission lambert radiation as pointolite.
Fig. 1 shows for the general arrangement of using LED 5 as the LED of traditional down straight aphototropism mode set of pointolite.With reference to Fig. 1, LED 5 is arranged on printed circuit board (PCB) (PCB) substrate 1 by the two-dimensional array mode with p uniformly-spaced.When from the preceding planar survey of traditional backlight module and when observing it, four angles of module backlight seem darker owing to lacking light quantity.
Summary of the invention
General plotting of the present invention provides a kind of module backlight and a kind of liquid crystal display (LCD) equipment that uses this module backlight, for four angles that prevent module backlight seem darker owing to lacking light quantity, improve the brightness uniformity of module backlight by the arrangement that improves the light-emitting device unit.
The other aspect of general plotting of the present invention will partly be illustrated in the following description, and part in addition is conspicuous by description, or partly can understand by implementing general plotting of the present invention.
Above-mentioned and/or the others of general plotting of the present invention can realize by a kind of module backlight is provided, this module backlight comprises base plate and a plurality of light-emitting devices unit, a plurality of light-emitting devices unit is arranged on the base plate with different arrangement pitches, the light-emitting device unit the edge of base plate than place in the middle of base plate arrange crypto set more.
A plurality of light-emitting devices unit can be arranged as n on base plate capable, and the light-emitting device unit the edge of at least one outmost row than locate to arrange therebetween crypto set more.Be arranged in arrangement pitch between the light-emitting device unit at least one outmost row can be from this edge of at least one outmost row in the middle of it, increase.The light-emitting device unit of equal number can be arranged on the capable every row of n.Light-emitting device unit on every row of remaining row can be arranged to wait arrangement pitch.
Between the light-emitting device unit on the every row that is arranged in remaining row is d0 at interval, the minimum interval that is arranged between the light-emitting device unit of edge of at least one outmost row is d1, when the largest interval of the light-emitting device unit that arrangement is located therebetween was d2, the arrangement of light-emitting device unit can be satisfied d1＜d0＜d2.
A plurality of light-emitting devices unit can be arranged as n on base plate capable, and the quantity that is arranged in the light-emitting device unit on the comparable every row that is arranged in remaining row of the quantity of the light-emitting device unit at least one outmost row is many.
Light-emitting device unit on every row of remaining row can be arranged to wait arrangement pitch.Be arranged in arrangement pitch between the light-emitting device unit at least one outmost row can be from this edge of at least one outmost row in the middle of it, increase.
A plurality of light-emitting devices unit can be arranged as n on base plate capable, narrow along the arrangement pitch between the row of the comparable centre of arrangement pitch between the row of the outside of the capable orientation of n.The light-emitting device unit of equal number can be arranged on the capable every row of n.
Each light-emitting device unit can comprise light emitting diode (LED) chip that produces light and make the collimating apparatus of the optical alignment that is produced by led chip.Collimating apparatus can be to make the side transmitter of incident light to launch near the direction of side direction.Collimating apparatus can be a cheese.
Module backlight also can comprise optical sheet and a plurality of catoptron, a plurality of catoptrons be arranged on the surface of optical sheet and reflection from the light-emitting device unit the direct light of emission upwards.Optical sheet can be made or the transmission-type scatter plate by transparent polymethylmethacrylate (PMMA).
The red, green and blue color beam can be launched in the light-emitting device unit, and alternately is arranged on every row according to color.
Module backlight also can comprise the first transmission-type scatter plate that is arranged on top, light-emitting device unit and transmission and scatter incident light.Module backlight also can comprise reflective scatter plate, and reflective scatter plate is arranged on below, light-emitting device unit and reflection and scatter incident light.
Module backlight also can comprise at least one in brightness enhancement film (BEF) and the polarization reinforcing membrane, and brightness enhancement film is used to strengthen the direction of light that penetrates from the first transmission-type scatter plate, and the polarization reinforcing membrane is used to improve polarization efficiency.
Above-mentioned and/or the others of general plotting of the present invention can realize by a kind of LCD equipment is provided, this LCD equipment comprises liquid crystal display and module backlight, module backlight is used for beam emissions to liquid crystal display and have base plate and an a plurality of light-emitting devices unit, a plurality of light-emitting devices unit is arranged on the base plate with different arrangement pitches, the light-emitting device unit the edge of base plate than place in the middle of base plate arrange crypto set more.
Above-mentioned and/or the others of general plotting of the present invention also can realize by a kind of module backlight that can be used for liquid crystal display (LCD) equipment is provided, this module backlight has base plate and being arranged on and is used for radiative many row's light-emitting devices unit on the base plate, the row and the inner row of outside drawn together in described many packages, the row of outside is arranged on the opposite end of base plate, and has a light-emitting device unit by separating at interval, described interval row's outside edge is littler than locating therebetween, inner come between the row who is arranged on the outside on the base plate and have the light-emitting device unit that separates with at interval, described interval is in the row's of inside edge and locate therebetween to equate.
Above-mentioned and/or the others of general plotting of the present invention also can realize by a kind of module backlight that can be used for liquid crystal display (LCD) equipment is provided, this module backlight comprises base plate and many row's light-emitting devices unit, many row's light-emitting devices unit is arranged on and is used for luminously on the base plate, and is arranged as the interval that interval that outside row's light-emitting device unit separates separates less than the row's of inside light-emitting device unit.
Above-mentioned and/or the others of general plotting of the present invention also can realize by a kind of module backlight that can be used for liquid crystal display (LCD) equipment is provided, this module backlight comprises base plate and light-emitting device unit, according to the position of each the light-emitting device unit on the base plate, the light-emitting device unit along the length direction of base plate with in the Width of base plate at least one, be arranged in separatedly on the described base plate with different size intervals.
Above-mentioned and/or the others of general plotting of the present invention also can realize that this liquid crystal display comprises liquid crystal display and module backlight by a kind of liquid crystal display is provided.Module backlight is launched light to liquid crystal display, and have base plate, be positioned at base plate the first module zone first quantity the light-emitting device unit and be positioned at the light-emitting device unit of second quantity of second unit area of base plate, the size of second unit area and first module zone measure-alike.
Above-mentioned and/or the others of general plotting of the present invention also can realize that this liquid crystal display comprises liquid crystal display and module backlight by a kind of liquid crystal display is provided.Module backlight is launched light to liquid crystal display, and have base plate, first module and a Unit second, first module has the first light-emitting device unit of the first area that is positioned at base plate, be used to launch light with first brightness, Unit second has the second light-emitting device unit of the second area that is positioned at base plate, is used to launch the light with second brightness, wherein, the first area is different from second area, and the size of first area and second area is big or small identical.
Above-mentioned and/or the others of general plotting of the present invention also can realize by a kind of module backlight is provided, this module backlight comprises base plate, be positioned at base plate the first area a plurality of first light-emitting device unit and be positioned at a plurality of second light-emitting device unit of the second area of base plate, wherein, the quantity of the first light-emitting device unit is identical with the quantity of the second light-emitting device unit, and the size of first area is different with the size of second area.
Description of drawings
In conjunction with the drawings embodiment is carried out following description, these and/or others of the present invention and characteristics will become clear and easy to understand more, in the accompanying drawing:
Fig. 1 is the view that illustrates for using LED as the general arrangement of the light emitting diode (LED) of traditional down straight aphototropism mode set of pointolite;
Fig. 2 is the sectional view that the module backlight of the embodiment of general plotting according to the present invention is shown;
Fig. 3 is the planimetric map of the schematically illustrated arrangement of the light-emitting device unit of the module backlight of Fig. 2 of the embodiment of general plotting according to the present invention;
Fig. 4 is the planimetric map of the schematically illustrated arrangement of the light-emitting device unit of the module backlight of Fig. 2 of another embodiment of general plotting according to the present invention;
Fig. 5 is the planimetric map of the schematically illustrated arrangement of the light-emitting device unit of the module backlight of Fig. 2 of another embodiment of general plotting according to the present invention;
Fig. 6 is the sectional view that one amplification in the light-emitting device unit of module backlight of Fig. 2 is shown;
Fig. 7 is the sectional view that the module backlight of another embodiment of general plotting according to the present invention is shown;
Fig. 8 A is the view that inhomogeneity analog result when the light-emitting device unit is arranged by traditional arrangement mode is shown;
Fig. 8 B is the view that inhomogeneity analog result when the embodiment of light-emitting device unit general plotting according to the present invention arranges is shown;
Fig. 9 is shown schematically as to obtain the view at interval of the unit cell arrangement of light-emitting device as a result shown in Fig. 8 A and Fig. 8 B;
Figure 10 is schematically illustrated be used to assess homogeneity and the measurement range of the effect of the improvement of calculating dark part and the view of measurement point;
Figure 11 is the view of liquid crystal display (LCD) device of module backlight of the embodiment of schematically illustrated use general plotting according to the present invention.
Embodiment
To embodiment be shown in the accompanying drawing in detail with reference to the embodiment of general plotting of the present invention now, wherein, identical label is represented components identical all the time.In order to explain general plotting of the present invention, with reference to figure these embodiment are described when as follows.
Fig. 2 shows the module backlight 100 of the embodiment of the general plotting according to the present invention.With reference to Fig. 2, module 100 backlight comprises: a plurality of light-emitting devices unit 10 is arranged on the base plate 101; Transmission-type scatter plate 140 is arranged on 10 tops, a plurality of light-emitting devices unit and transmission and scatter incident light; Reflective scatter plate 110 is arranged on 10 belows, a plurality of light-emitting devices unit and reflection and scatter incident light.
Here, master (principal) direction of propagation of the light of light emitting diode (LED) chip 11 emissions of " in ... top " expression from each light-emitting device unit 10, and " ... the below " the opposite direction of expression.The main direction of propagation of light corresponds essentially to the central shaft C (see figure 6) of each light-emitting device unit 10.
The substrate that base plate 101 is arranged thereon as a plurality of light-emitting devices unit 10.Base plate 101 can be printed circuit board (PCB) (PCB), and light emitting diode (LED) chip 11 electricity are bonded to printed circuit board (PCB).As selection, module group unit 100 backlight can comprise base plate 101 respectively and be used for the PCB of driven for emitting lights device unit 10.Interval difference between a plurality of light-emitting devices unit 10, light-emitting device unit 10 the edge of base plate 101 than place in the middle of base plate 101 arrange crypto set more.
Fig. 3 schematically shows the arrangement of light-emitting device unit 10 of the Fig. 2 of the embodiment of general plotting according to the present invention.With reference to Fig. 3, light-emitting device unit 10 is with the capable L of n
1To L
nArray way be arranged on the base plate 101.The interval of comparable light-emitting device unit, interval between the adjacent lines 10 on every row is wide.
As shown in Figure 3, light-emitting device unit 10 is at outmost at least capable L
1And L
nEdge than at outmost capable L
1And L
nIn the middle of the place arrange crypto set more.That is, light-emitting device unit 10 is at outmost capable L
1And L
nOn arrangement pitch increase from the edge to the centre.On the other hand, light-emitting device unit 10 is at each remaining capable L
2To L
N-1Go up uniformly-spaced to arrange.Therefore, be arranged in outmost capable L
1And L
nThe light-emitting device unit 10 of edge between the interval ratio be arranged in each remaining capable L
2To L
N-1On light-emitting device unit 10 between the interval narrow.
The light-emitting device unit 10 of equal number can be arranged on every row.Therefore, be arranged in outmost capable L
1And L
nIn the middle of interval between the light-emitting device unit 10 at place than uniformly-spaced to be arranged in each remaining capable L
2To L
N-1On light-emitting device unit 10 between the interval wide.
For example, when being arranged in each remaining capable L
2To L
N-1On adjacent light-emitting device unit 10 between be d0 at interval, be arranged in outmost capable L
1And L
nThe adjacent light-emitting device unit 10 of edge between the minimum interval be d1, be arranged in outmost capable L
1And L
nIn the middle of largest interval between the adjacent light-emitting device unit 10 at place when being d2, the arrangement of a plurality of light-emitting devices unit 10 can be satisfied d1＜d0＜d2.
Only be arranged in outmost capable L by change
1And L
nOn light-emitting device unit 10 between the interval keep arranging the L that is expert at simultaneously
1To L
nEach on the quantity of light-emitting device unit 10 identical, the quantity of the light-emitting device unit 10 of use can be identical with the quantity of employed light-emitting device unit 10 when uniformly-spaced arranging, light-emitting device unit 10 on every row.This has prevented to produce dark part and do not bring extra manufacturing cost at four angles of module 100 backlight, thereby makes total brightness uniformity improve.
Fig. 3 shows light-emitting device unit 10 and is arranged in example on the five-element, and wherein, light-emitting device unit 10 is at the first row L
1With fifth line L
5Edge than first the row L
1With fifth line L
5In the middle of the place arrange crypto set more, simultaneously at middle triplex row L
2To L
4Every row on light-emitting device unit 10 uniformly-spaced to arrange.The quantity of row can be according to design conditions with the quantity of light-emitting device unit 10 on being arranged in every row and different.
When light-emitting device unit 10 is arranged as shown in Figure 3, compare uniformly-spaced to arrange with light-emitting device, light quantity on four angles of module 100 backlight can increase, thereby the light-emitting device unit 10 with equal number has improved total brightness uniformity, has prevented that simultaneously four angles of module 100 backlight from seeming darker owing to lacking light quantity.
The brightness uniformity of module 100 backlight is very important to the performance of evaluation form area source.Because the brightness of measuring on four angles of module 100 backlight is minimum, so the homogeneity of module backlight 100 generally is tending towards reducing.Yet in the light-emitting device unit 10 according to the embodiment of Fig. 3, the interval between the light-emitting device unit 10 on four angles is narrow, and this arrangement of light-emitting device unit 10 has improved brightness uniformity, has prevented to produce on four angles dark part simultaneously.
A plurality of light-emitting devices unit 10 is not limited to the arrangement of the embodiment of Fig. 3, and can arrange by variety of way.Fig. 4 and Fig. 5 schematically show the arrangement of light-emitting device unit 10 of the Fig. 2 of other various embodiment of general plotting according to the present invention.Though in order to see clearlyer, compare with the quantity of light-emitting device 10 shown in Figure 3, the total quantity of Fig. 4 and light-emitting device unit 10 shown in Figure 5 reduces, many shown in the comparable Fig. 4 of the quantity of light-emitting device unit 10 and Fig. 5.In addition, be arranged on six row though Fig. 4 and Fig. 5 represent light-emitting device unit 10, capable quantity can be according to design conditions and difference.
With reference to Fig. 4, a plurality of luminous display units unit 10 be arranged in n capable on, at least one outmost row for example at L
1And L
nThe quantity of the light-emitting device unit 10 of last arrangement is more than at each remaining capable L
2To L
N-1The quantity of the light-emitting device unit 10 of last arrangement.In addition, light-emitting device unit 10 is at outmost capable L
1And L
nEdge than locate to arrange therebetween crypto set more.
Similar with the embodiment of Fig. 3, at outmost capable L
1And L
nOn the arrangement pitch of light-emitting device unit 10 increase to the centre from the edge.At each remaining capable L
2To L
N-1On, light-emitting device unit 10 can be uniformly-spaced to arrange.Owing to be arranged in outmost capable L
1And L
nOn the quantity of light-emitting device unit 10 more, be arranged in outmost capable L
1And L
nIn the middle of the place light-emitting device unit 10 can by with at each remaining capable L
2To L
N-1On the identical uniformly-spaced arrangement of light-emitting device unit 10.
Light-emitting device unit 10 shown in Fig. 4 the edge of module 100 backlight than locate to arrange therebetween crypto set more, this arrangement can prevent in the bight of module 100 backlight owing to the generation that lacks the dark part that light quantity causes, thereby improved total brightness uniformity of module 100 backlight.
Fig. 5 schematically shows the arrangement of light-emitting device unit 10 of the Fig. 2 of another embodiment of general plotting according to the present invention.With reference to Fig. 5, a plurality of light-emitting devices unit 10 be arranged on the base plate 101 n capable on, and narrower than the interval Y between the row of centre along the interval Y1 between the row of the outside of the capable orientation of described n.As shown in Figure 5, can equate, but general plotting of the present invention is not limited thereto in the quantity of the light-emitting device unit 10 on every row and the interval between the adjacent light-emitting device unit 10.
On light-emitting device unit 10 row outside shown in Figure 5 than on the row of centre, arrange crypto set more, this arrangement can prevent in the bight of module 100 backlight owing to the generation that lacks the dark part that light quantity causes, thereby improved total brightness uniformity of module 100 backlight.
Fig. 5 shows the different and example of the light-emitting device unit 10 on every row uniformly-spaced to arrange in interval between these row.Yet the edge of interval at least one the outmost row at this between the light-emitting device unit 10 at least one outmost row can be narrower than the interval of locating therebetween, and the interval difference between these row.
The direction of extending when every row is that direction that horizontal direction and these row are arranged is when being vertical direction, can be by changing Fig. 3 to the interval between the light-emitting device unit 10 on level and/or the vertical direction shown in Figure 5, more particularly, locate to arrange more crypto set of light-emitting device unit 10 by arrange light-emitting device unit 10 in the edge of module 100 backlight than therebetween, improve total brightness uniformity of module 100 backlight.Here, Fig. 3 and Fig. 4 show by reducing the interval between the light-emitting device unit 10 on four angles of module 100 backlight and increasing the arrangement that the light quantity on it improves brightness and prevents to produce dark part.Fig. 5 shows the identical arrangement of quantity that keeps the light-emitting device unit on every row along the interval difference between the light-emitting device unit 10 of vertical direction simultaneously.
Fig. 6 is the sectional view that the amplification of light-emitting device unit 10 is shown.With reference to Fig. 6, light-emitting device unit 10 can comprise led chip 11 and side transmitter 13, and wherein, led chip 11 produces light, and side transmitter 13 is as collimating apparatus so that by the optical alignment of led chip 11 generations and launch collimated light on the direction of basic side direction.
When being installed on the pedestal 12, led chip 11 can combine with side transmitter 13.For the amount that is transmitted into the light of side transmitter 13 by led chip 11 is reached at most, led chip 11 can closely be adhered on the side transmitter 13.
Red (R), green (G) and blue (B) color beam can be launched in light-emitting device unit 10.In this case, light-emitting device unit 10 comprises the led chip 11 that is used for producing respectively R, G and B color beam.At L
1To L
nEvery row on, the light-emitting device unit 10 of emission R, G and B color beam can alternately be arranged according to color.
The quantity that is arranged in the light-emitting device unit 10 that is used for the shades of colour light beam on every row can be according to from the intensity of the color beam of its emission and difference.
Can differ from one another from R, the G of led chip 11 emission of correspondence and the intensity of B color beam.For example, the intensity of G color beam can be lower than the intensity of R color beam and B color beam.Therefore, for example, can equal the quantity of blue light emitting device unit 10 for the quantity of the red light-emitting device unit 10 of every row, and the quantity of green luminescence device unit 10 can be double in the quantity of ruddiness or blue light emitting device unit 10.Ruddiness, green glow and blue light emitting device unit 10 can be by the series arrangement of R, G, G, B or B, G, G, R on every row.
As selection, white light can all be launched in light-emitting device unit 10.That is, each light-emitting device unit 10 can comprise the led chip 11 that produces white light.
When module 100 backlight comprises the light-emitting device unit 10 that contains the led chip 11 that produces R, G and B color beam or has the light-emitting device unit 10 of the led chip 11 that produces white light, use this module 100 backlight liquid crystal display (LCD) but the equipment color display.
As shown in Figure 6, side transmitter 13 can comprise the transparent body of being made by transparent material.More particularly, side transmitter 13 can comprise: infundibulate reflecting surface 14, tilt with respect to central shaft C; First refractive surface 15 is inclined to the angle so that from the anaclasis of reflecting surface 14 reflection with respect to central shaft C; Second refractive surface 17 extends to convex surface from pedestal 12 to first refractive surface 15.The light that is transmitted into the reflecting surface 14 of side transmitter 13 from led chip 11 is reflected to first refractive surface 15 from reflecting surface 14, then, is refracted in the direction near side direction from first refractive surface 15.Directly near the direction of side direction, be refracted from led chip 11 from second refractive surface 17 to the light of second refractive surface, 17 emissions.
Here, side transmitter 13 can have near the direction of side direction and can launch from any other shape of the light of led chip 11 incidents.
With reference to Fig. 2, reflective scatter plate 110 reflection and scatter incident light make the light that is reflected upwards propagate.Reflective scatter plate 110 is set in place on the base plate 101 of 10 belows, light-emitting device unit.Therefore, reflective scatter plate 110 can have a plurality of holes that corresponding light-emitting device unit 10 can pass.Reflective scatter plate 110 is arranged on the base plate 101 and light-emitting device unit 10 is inserted in a plurality of holes.
The bottom 100a of transmission-type scatter plate 140 and module 100 backlight promptly, up separates predetermined apart from d with light-emitting device unit 10 and reflective scatter plate 110.140 transmissions of transmission-type scatter plate and scatter incident light.
If transmission-type scatter plate 140 is too near from getting with light-emitting device unit 10, then 10 residing zones, light-emitting device unit seem brighter than remaining area, thereby cause brightness uniformity to reduce.In addition, because the distance increase between transmission-type scatter plate 140 and the light-emitting device unit 10, so the thickness of module backlight 100 increases.Therefore, transmission-type scatter plate 140 and comprise the light-emitting device unit and the bottom 100a of the module backlight 100 of reflective scatter plate 110 between distance can be determined to be in as far as possible in the scope of abundant mixed light and reduce to minimum.
By in 13 emissions of side transmitter, can directly upwards propagate from side transmitter 13 by some light (for example, about 20%) near the direction of side direction for the most light that produced by led chip 11 in each light-emitting device unit 10.
Owing to have the light of upwards propagating towards side transmitter 13, so can see the hot spot of the position that is positioned at led chip 11 from the top of module 100 backlight.In addition, when the led chip 11 of emission R, G and B color beam is used for color display, the color that can see led chip 11 from the top of module 100 backlight.
Therefore, module 100 backlight also can comprise a plurality of catoptrons 120, a plurality of catoptrons 120 be arranged on the surface of optical sheet 130 and reflection from the light-emitting device unit the 10 direct light of emission upwards.A plurality of catoptrons 120 are arranged on the surface of optical sheet 130 with the position corresponding to light-emitting device unit 10.That is, each of a plurality of catoptrons 120 is arranged on corresponding 10 tops, a light-emitting device unit.
The optical sheet 130 that a plurality of catoptrons 120 are arranged thereon can be made by the transparent polymethylmethacrylate (PMMA) of transmission incident light.As selection, optical sheet 130 can be used as the second transmission-type scatter plate.
Each of a plurality of catoptrons 120 can separate predetermined distance with corresponding light-emitting device unit 10.In order to keep this distance, optical sheet 130 can be supported by supporter 135.Supporter 135 is with respect to reflective scatter plate 110 or base plate 101 support of optical plates 130.
With only use reflective scatter plate 110 and compare with transmission-type scatter plate 140, use scatters light as the second transmission-type scatter plate of optical sheet 130 fully, thereby reduced the distance between transmission-type scatter plate 140 and the light-emitting device unit 10, i.e. distance between the bottom 100a of transmission-type scatter plate 140 and module backlight 100.This causes the thickness of module 100 backlight to reduce.
When the second transmission-type scatter plate was used as optical sheet 130, the optical transmission rate was lower than the transmissivity in the transparent PMMA time of use.Therefore, whether transmission-type scatter plate or transparent PMMA can be according to the thickness that reduces module 100 backlight than increasing the more important optical sheet 130 that is used as of luminous emissivity.
Simultaneously, module 100 backlight also comprises brightness enhancement film (BEF) 150 and polarization reinforcing membrane 170, and wherein, brightness enhancement film 150 is used for strengthening the direction of light through transmission-type scatter plate 140, and polarization reinforcing membrane 170 is used for improving polarization efficiency.
Use the LCD equipment of module 100 backlight to comprise the liquid crystal display that is positioned at module backlight 100 tops.Well-known in this area, when the liquid crystal layer in the linearly polarized light beam process liquid crystal display, the sensing of liquid crystal director changes by the electric field that applies, and makes the polarization of light beam be changed, thereby can make image information display on liquid crystal display.
Because when the light that is incident on the liquid crystal display has the efficient raising of single polarization state time utilization, so in module 100 backlight, use polarization reinforcing membrane 170 can improve optical efficiency.
As mentioned above, use module 100 backlight to prevent that four angles of module 100 backlight from seeming darker for LCD equipment, thereby improved brightness uniformity, and then on the whole screen of LCD equipment, provide high quality graphic with uniform luminance.
Fig. 7 be module backlight 100 that second embodiment of general plotting according to the present invention is shown ' sectional view.Though the module backlight 100 of Fig. 2 comprises light-emitting device unit 10, each light-emitting device unit 10 has the side transmitter 13 as collimating apparatus, but the module backlight 100 of Fig. 7 ' comprise light-emitting device unit 50, each light-emitting device unit 50 has dome-shaped collimating apparatus 60.The module backlight 100 of Fig. 7 ' except the light-emitting device unit 50 with dome-shaped collimating apparatus 60, the function of its remainder is basic identical with the function of the counterpart shown in Fig. 2.Same numeral among the figure is represented components identical, thereby will omit description of them.
Describe in detail with reference to Fig. 8 A and Fig. 8 B, with light-emitting device unit 10 (50) the edge of outmost row than locate to arrange therebetween more during crypto set, dark part improves effect in the aforesaid module 100 backlight.Fig. 8 A shows optics Simulation result when light-emitting device unit 10 (50) is arranged by traditional arrangement mode, and Fig. 8 B shows optics Simulation result when the embodiment of light-emitting device unit 10 (50) general plotting according to the present invention arranges.
As shown in Figure 9, when light-emitting device unit 10 (50) is arranged on the five-element, for every row, 19 red light-emitting device units, 38 green luminescence device units and 19 series arrangement that the blue light emitting device unit is pressed R, G, G, B or B, G, G, R, amounting to 76 light-emitting device unit 10 (50) is arranged in the scope of wide 960mm, and be spaced apart 105mm between these row, obtain the result shown in Fig. 8 A and Fig. 8 B.
Fig. 8 A is corresponding to the situation of the light-emitting device unit on every row 10 (50) uniformly-spaced to arrange, Fig. 8 B corresponding to the edge of light-emitting device unit 10 (50) on first row and fifth line than locate to arrange therebetween crypto set and walk to the situation uniformly-spaced to arrange on the fourth line more second.
A from Fig. 8 A
TraditionalWith the B among Fig. 8 B
The present inventionThe part of indication obviously finds out, when light-emitting device unit 10 (50) the edge of outmost row than locate to arrange therebetween more during crypto set four angles of module 100 backlight seem brighter than the light-emitting device unit 10 (50) on every row when uniformly-spaced arranging.
As utilizing the optical analogy result to calculate the result of the removal effect of improving effect and dark part of homogeneity aspect, traditional method reaches the removal of the dark part of 86% homogeneity and 76%, and the embodiment of general plotting of the present invention exceeds about 3% and exceeding about 19% aspect the removal of dark part than traditional method aspect the homogeneity strengthening.That is, the present embodiment of general plotting of the present invention reaches the removal of the dark part of about 89% homogeneity and about 95%.
Utilize measurement range shown in Figure 10 and measurement point to measure the removal of resulting improvement aspect homogeneity and dark part.As shown in Figure 10, measurement point comprises: central point 1.; 2., 3., 4. and 5. four points are positioned at 1. wide 339mm of decentering point and long 191mm place; 6., 7., 8. and 9. four angle points are positioned at 1. wide 484mm of decentering point and long 261.5mm place.The width of each point of measuring is 50mm.
When brightness that 1. T1, T2, T3, T4, T5, T6, T7, T8 and T9 are illustrated respectively in a little, 2., 3., 4., 5., 6., 7., 8. and 9. locate to measure, homogeneity is expressed as the number percent that T1 removes the minimum value of T2, T3, T4 and T5, and the removal of dark part is expressed as the number percent that T1 removes the minimum value of T6, T7, T8 and T9.
Homogeneity is generally measured at the point corresponding to inside from the edge about 10% distance.As the point of the American National Standards Institute's appointment that is used to assess inhomogeneity international standard, corresponding to the center of four rectangles in the bight of nine equal-sized rectangles forming entire image, promptly 2., 3., 4. and 5..
Utilize the result of the improvement of optical analogy result calculating aspect homogeneity and the removal of dark part to prove, the present embodiment of general plotting arrangement light-emitting device unit can improve homogeneity according to the present invention, and the while has prevented the generation of dark part effectively and do not damaged homogeneity.
Figure 11 schematically shows the LCD equipment of module backlight 100 of the embodiment of use general plotting according to the present invention.With reference to Figure 11, LCD equipment comprises module 100 backlight and is positioned at the liquid crystal display 300 of module backlight 100 tops.Liquid crystal display 300 is bonded to driving circuit.Because the display operation of the detailed construction of liquid crystal display 300 and use driving circuit is this area well-known, so will no longer provide its description.
In the module backlight of general plotting according to the present invention, by the interval between different these a plurality of light-emitting devices unit, make a plurality of light-emitting devices unit the edge of base plate than locate to arrange therebetween crypto set more, thereby prevent from four angles of base plate to have improved overall brightness uniformity simultaneously owing to the generation that lacks the dark part that light quantity causes.
Though shown and described some embodiment of general plotting of the present invention, but those skilled in the art will appreciate that, under the situation of principle that does not break away from the general plotting that limits its scope by claim and equivalent thereof and spirit, can change these embodiments.
The application requires respectively on October 22nd, 2004 and was submitted to 10-2004-84960 number and the rights and interests of 10-2004-98697 korean patent application of Korea S Department of Intellectual Property on November 29th, 2004, the content of these applications all is disclosed in this, for reference.
Claims (37)
1, a kind of module backlight comprises:
Base plate;
A plurality of light-emitting devices unit is arranged on the described base plate with different arrangement pitches, described light-emitting device unit the edge of described base plate than place in the middle of described base plate arrange crypto set more.
2, module backlight as claimed in claim 1, wherein, described a plurality of light-emitting devices unit can be arranged as n on described base plate capable, and described a plurality of light-emitting devices unit the edge of at least one outmost row than locate to arrange therebetween crypto set more.
3, module backlight as claimed in claim 2, wherein, the arrangement pitch that is arranged between the described light-emitting device unit on described at least one outmost row increases in the middle of it from the edge of described at least one outmost row.
4, module backlight as claimed in claim 2, wherein, the described light-emitting device unit cell arrangement of equal number is on the capable every row of n.
5, module backlight as claimed in claim 2, wherein, the described light-emitting device unit on every row of described remaining row is arranged to wait arrangement pitch.
6, module backlight as claimed in claim 5, wherein, between the described light-emitting device unit on the every row that is arranged in described remaining row is d0 at interval, the minimum interval that is arranged between the described light-emitting device unit of edge of described at least one outmost row is d1, be arranged in described at least one outmost row in the middle of the largest interval of described light-emitting device unit at place when being d2, d1＜d0＜d2 is satisfied in the arrangement of described arrangement light-emitting device unit.
7, module backlight as claimed in claim 1, wherein, described a plurality of light-emitting devices unit is arranged as n on described base plate capable, wherein, it is more than the quantity of the described light-emitting device unit on the every row that is arranged in described remaining row to be arranged in the quantity of the described light-emitting device unit at least one outmost row.
8, module backlight as claimed in claim 7, wherein, the described light-emitting device unit on every row of described remaining row is arranged to wait arrangement pitch.
9, module backlight as claimed in claim 7, wherein, the arrangement pitch that is arranged between the described light-emitting device unit at least one outmost row increases in the middle of it from the edge of described at least one outmost row.
10, module backlight as claimed in claim 1, wherein, described a plurality of light-emitting devices unit is arranged as n on described base plate capable, wherein, narrow than the arrangement pitch between the middle row along the arrangement pitch between the outside row of the capable orientation of described n.
11, module backlight as claimed in claim 10, wherein, the described light-emitting device unit cell arrangement of equal number is on the capable every row of described n.
12, module backlight as claimed in claim 1, wherein, each of described light-emitting device unit comprises:
Light-emitting diode chip for backlight unit is used to produce light;
Collimating apparatus makes the optical alignment that is produced by described light-emitting diode chip for backlight unit.
13, module backlight as claimed in claim 12, wherein, described collimating apparatus comprises makes the side transmitter of incident light to launch near the direction of side direction.
14, module backlight as claimed in claim 12, wherein, described collimating apparatus is a cheese.
15, module backlight as claimed in claim 1 also comprises:
Optical sheet;
A plurality of catoptrons, be arranged on the surface of described optical sheet and reflection from described light-emitting device unit the direct light of emission upwards.
16, module backlight as claimed in claim 15, wherein, described optical sheet comprises in transparent polymethylmethacrylate plate and the transmission-type scatter plate.
17, module backlight as claimed in claim 1, wherein, the red, green and blue color beam is launched in described light-emitting device unit, and alternately is arranged on the described base plate according to color.
18, as claim 1 any one described module backlight to the claim 17, also comprise:
The first transmission-type scatter plate is arranged on top, described light-emitting device unit and transmission and scatter incident light.
19, module backlight as claimed in claim 18 also comprises:
Reflective scatter plate is arranged on below, described light-emitting device unit and reflection and scatter incident light.
20, module backlight as claimed in claim 18 also comprises:
In brightness enhancement film and the polarization reinforcing membrane at least one, described brightness enhancement film are used to strengthen the direction of light that penetrates from the described first transmission-type scatter plate, and described polarization reinforcing membrane is used to improve polarization efficiency.
21, a kind of liquid crystal display comprises:
Liquid crystal display;
As claim 1 any one described module backlight to the claim 17, light is transmitted on the described liquid crystal display.
22, equipment as claimed in claim 21 also comprises:
The first transmission-type scatter plate is arranged on top, described light-emitting device unit and transmission and scatter incident light.
23, equipment as claimed in claim 22 also comprises:
Reflective scatter plate is arranged on below, described light-emitting device unit and reflection and scatter incident light.
24, equipment as claimed in claim 22 also comprises:
In brightness enhancement film and the polarization reinforcing membrane at least one, described brightness enhancement film are used to strengthen the direction of light that penetrates from the described first transmission-type scatter plate, and described polarization reinforcing membrane is used to improve polarization efficiency.
25, a kind of module backlight that can be used for liquid crystal display comprises:
Base plate;
Many row's light-emitting devices unit are arranged on the described base plate with emission light, and described many packages are drawn together
The row of outside is arranged on the opposite end of described base plate and has the light-emitting device unit that separates by at interval, and described interval is located little therebetween at edge's ratio of the row of described outside,
Inner row, between the row who is arranged on described outside on the described base plate and have the light-emitting device unit that separates by at interval, described interval is in the row's of described inside edge and locate therebetween to equate.
26, module backlight as claimed in claim 25, wherein, the row of described outside and the row of described inside have the light-emitting device unit of equal number.
27, module backlight as claimed in claim 25, wherein, the quantity of the light-emitting device unit that the quantity of the light-emitting device unit that the row of described outside has has more than the row of described inside.
28, module backlight as claimed in claim 27 wherein, is arranged on the interval that the row's of described outside described light-emitting device unit interval that separates and the row's who is arranged on described inside the described light-emitting device unit in centre position separates and equates.
29, module backlight as claimed in claim 25, wherein, described many rows are uniformly-spaced to separate each other.
30, a kind of module backlight that can be used for liquid crystal display comprises:
Base plate;
Many row's light-emitting devices unit are arranged on and are used for luminously on the described base plate, and described many row's light-emitting devices unit is arranged as the interval that interval that the row's of outside light-emitting device unit separates separates less than the row's of inside light-emitting device unit.
31, module backlight as claimed in claim 30, wherein, the described light-emitting device unit on described each of arranging uniformly-spaced to separate each other more.
32, a kind of module backlight that can be used for liquid crystal display comprises:
Base plate;
The light-emitting device unit, according to the position of each the light-emitting device unit on the described base plate, described light-emitting device unit along the length direction of described base plate with in the Width of described base plate at least one, be arranged in separatedly on the described base plate with different size intervals.
33, module backlight as claimed in claim 32, wherein, the interval that separates less than near the module backlight centre that is arranged on described base plate, the interval that separates near the module backlight at angle that is arranged on described base plate in described length direction and described Width.
34, a kind of liquid crystal display comprises: liquid crystal display;
Module backlight to described liquid crystal display emission light, and has
Base plate,
The light-emitting device unit of first quantity is positioned at the first module zone of described base plate,
The light-emitting device unit of second quantity is positioned at second unit area of described base plate, described second unit area and described first module zone measure-alike.
35, liquid crystal display as claimed in claim 34 also comprises:
Optical sheet, be arranged between described liquid crystal display and the described module backlight, and have a plurality of catoptrons, wherein, each described light-emitting device unit comprises reflecting surface, first refractive surface and second refractive surface, the described reflecting surface reflection first bundle light, described first refractive surface refraction, the second bundle light, described second refractive surface is with the direction of three-beam refraction to the central shaft that is basically perpendicular to described base plate.
36, a kind of liquid crystal display comprises:
Liquid crystal display;
Module backlight to described liquid crystal display emission light, and has
Base plate;
First module has the first light-emitting device unit of the first area that is positioned at described base plate, is used to launch the light with first brightness,
Unit second has the second light-emitting device unit of the second area that is positioned at described base plate, is used to launch the light with second brightness,
Wherein, described first area is different from described second area, and the size of described first area and described second area is big or small identical.
37, a kind of module backlight comprises:
Base plate;
A plurality of first light-emitting device unit are positioned at the first area of described base plate;
A plurality of second light-emitting device unit are positioned at the second area of described base plate,
Wherein, the quantity of the described first light-emitting device unit is identical with the quantity of the described second light-emitting device unit, and the size of described first area is different with the size of described second area.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20040084960 | 2004-10-22 | ||
| KR1020040084960 | 2004-10-22 | ||
| KR1020040098697 | 2004-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1763606A true CN1763606A (en) | 2006-04-26 |
| CN100474064C CN100474064C (en) | 2009-04-01 |
Family
ID=36747824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101094011A Expired - Fee Related CN100474064C (en) | 2004-10-22 | 2005-10-18 | Backlight unit and liquid crystal display apparatus employing the same |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR100677151B1 (en) |
| CN (1) | CN100474064C (en) |
| NL (1) | NL1030209C2 (en) |
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| KR100421900B1 (en) * | 1997-04-09 | 2004-04-17 | 엘지.필립스 엘시디 주식회사 | back light of liquid grystal display device |
| JP2000137223A (en) | 1998-11-02 | 2000-05-16 | Kyocera Corp | Liquid crystal display device |
| JP3800402B2 (en) | 2001-08-08 | 2006-07-26 | 株式会社日立製作所 | Liquid crystal display |
| JP4907016B2 (en) | 2001-08-09 | 2012-03-28 | 株式会社 日立ディスプレイズ | Liquid crystal display |
| JP2004152496A (en) | 2002-10-28 | 2004-05-27 | Nissen Chemitec Corp | Light guide plate |
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- 2005-10-18 CN CNB2005101094011A patent/CN100474064C/en not_active Expired - Fee Related
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| CN112305806A (en) * | 2019-07-30 | 2021-02-02 | 乐金显示有限公司 | Color conversion sheet, backlight unit and display device |
| CN112305806B (en) * | 2019-07-30 | 2024-06-28 | 乐金显示有限公司 | Color conversion sheet, backlight unit, and display device |
| CN115220233A (en) * | 2022-07-28 | 2022-10-21 | 浙江炽云科技有限公司 | HUD backlight system, design method, head-up display system and vehicle |
| WO2024197997A1 (en) * | 2023-03-30 | 2024-10-03 | 武汉华星光电技术有限公司 | Backlight module, display module, and tiled display device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060035540A (en) | 2006-04-26 |
| CN100474064C (en) | 2009-04-01 |
| NL1030209A1 (en) | 2006-04-25 |
| NL1030209C2 (en) | 2011-03-29 |
| KR100677151B1 (en) | 2007-02-02 |
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