CN101303478B - Liquid crystal display device and its backlight module - Google Patents
Liquid crystal display device and its backlight module Download PDFInfo
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- CN101303478B CN101303478B CN2007101028131A CN200710102813A CN101303478B CN 101303478 B CN101303478 B CN 101303478B CN 2007101028131 A CN2007101028131 A CN 2007101028131A CN 200710102813 A CN200710102813 A CN 200710102813A CN 101303478 B CN101303478 B CN 101303478B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 31
- 230000010287 polarization Effects 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 8
- 230000011514 reflex Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- -1 acryl Chemical group 0.000 description 1
- 208000012839 conversion disease Diseases 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The invention discloses a backlight module which comprises a reflector plate, a first reflection type polarizer, a light source, a phase retarder and a second reflection type polarizer. The first reflection type polarizer is arranged above the reflector plate and forms a gap with the reflector plate. The light source is arranged between the reflector plate and the first reflection type polarizer and used for providing light rays. The phase retarder is disposed on the first reflective polarizer and has a plurality of phase retardation regions and a non-phase retardation region. The second reflection type polarizer is arranged on the phase delay sheet. The light provided by the light source passes through the second reflection type polarizer through the action of the phase delay area.
Description
Technical field
The present invention relates to a kind of display device and light source module thereof, and be particularly related to a kind of liquid crystal indicator and backlight module thereof.
Background technology
Along with modern video signal development of technology, LCD (liquid crystal display, LCD) mobile phone (mobile phone), notebook computer (notebook personal computer), PC (personal computer have been used in large quantities, PC) and personal digital assistant (personal digital assistant PDA) waits on the display screen of consumption electronic products.Yet, because the display panels (LCD panel) of LCD itself does not have luminous function, therefore need below display panels, dispose backlight module (backlight module) providing display panels needed light source, and then make display panels reach the effect of demonstration.
In general, backlight module can be divided into straight-down negative (direct type) and two kinds of side incident types (sideincident type), wherein direct type backlight module is generally used in the LCD of large-size, and side incident type backlight module is generally used in the LCD of reduced size.
Fig. 1 is the synoptic diagram of known side incident type backlight module.Please refer to Fig. 1, side incident type backlight module 100 comprises light guide plate 130, a plurality of cathode fluorescent tube 120, lampshade 110 and blooming piece 140.Wherein, light guide plate 130 has incidence surface 114 and exiting surface 116, and cathode fluorescent tube 120 is incidence surface 114 sides that are disposed at light guide plate 130, and is positioned at lampshade 110.In addition, blooming piece 140 is to be disposed on the exiting surface 116 of light guide plate 130.Reenter after light direct incident light guide plate 130 of meeting that cathode fluorescent tube 120 is sent or the reflection via lampshade 110 earlier and penetrate light guide plate 130, afterwards, the exiting surface 116 from light guide plate 130 penetrates again.The effect of this light guide plate 130 is that the light that cathode fluorescent tube 120 is sent is transformed into area source by line source.
Side incident type backlight module 100 is because of adopting thick and heavy light guide plate 130, so can make side incident type backlight module 100 have overweight problem.In addition, if side incident type backlight module 100 is applied in large-sized LCD, can produce the shortcoming of the low and easy warpage of the making yield rate of large-sized light guide plate 130.
Summary of the invention
The purpose of this invention is to provide a kind of backlight module, it need not use light guide plate or diffusing panel and deflection.
Another object of the present invention provides a kind of liquid crystal indicator, and its backlight module need not use light guide plate or diffusing panel and deflection.
For reaching above-mentioned or other purposes, the present invention proposes a kind of backlight module, and it comprises reflector plate, first reflective polaroid (polarizer), light source, phase delay chip (retarder) and second reflective polaroid.First reflective polaroid is disposed at the reflector plate top, and forms a gap with reflector plate.Light source is disposed between the reflector plate and first reflective polaroid, in order to light to be provided.Phase delay chip is disposed on first reflective polaroid, and has a plurality of phase delay area and a non-phase delay area, and the total area of a plurality of phase delay area in the unit area by apart from this light source more nearby to increasing progressively at a distance apart from this light source.Second reflective polaroid is disposed on the phase delay chip, wherein the light that provides of light source via the effect of phase delay area by second reflective polaroid.
In one embodiment of this invention, the first above-mentioned reflective polaroid and second reflective polaroid are the line polaroid, and the linear polarization of the light by first reflective polaroid and second reflective polaroid is orthogonal.
In one embodiment of this invention, first reflective polaroid of above-mentioned backlight module and second reflective polaroid are the rotatory polarization sheet, and the circular polarization of the light by first reflective polaroid and second reflective polaroid is opposite each other.In addition, this backlight module can also comprise 1/4 wavelength phase delay chip, is disposed on second reflective polaroid.
In one embodiment of this invention, the light source of above-mentioned backlight module is positioned at the edge of reflector plate and is luminous towards the middle section of reflector plate.In addition, this backlight module can also comprise lens, is disposed on the light emitting path of light source.
In one embodiment of this invention, above-mentioned light source comprises a plurality of light-emitting components, is evenly distributed on the reflector plate.
In one embodiment of this invention, above-mentioned backlight module also comprises a plurality of fixtures, with the relative position of fixation reflex sheet, first reflective polaroid, phase delay chip and second reflective polaroid.Wherein, reflector plate, first reflective polaroid, phase delay chip and second reflective polaroid can have a plurality of perforations respectively, these fixtures run through these perforations and fixation reflex sheet, first reflective polaroid, phase delay chip and second reflective polaroid, wherein to the maximum diameter of hole of small part perforation greater than the maximum outside diameter of these fixtures.
In one embodiment of this invention, above-mentioned reflector plate, first reflective polaroid, phase delay chip and second reflective polaroid are deflection.
In one embodiment of this invention, above-mentioned backlight module also comprises support member, and it is disposed between the reflector plate and first reflective polaroid to keep the gap.In addition, above-mentioned backlight module can also comprise transparent support plate, and it is disposed between first reflective polaroid and the support member.
In one embodiment of this invention, phase delay chip is 1/2 wavelength phase delay chip.
In one embodiment of this invention, the total area of the phase delay area in the unit area is increased progressively to the distance light source more nearby at a distance by the distance light source.
For reaching above-mentioned or other purposes, the present invention more proposes a kind of backlight module, and it comprises reflector plate, selective reflecting sheet and light source.The selective reflecting sheet is disposed at the reflector plate top, and has a plurality of photic zones and reflective areas.In addition, selective reflecting sheet and reflector plate form a gap.Light source is disposed at the gap of reflector plate and selective reflecting sheet, in order to light to be provided.
In one embodiment of this invention, the light source of above-mentioned backlight module is positioned at the edge of reflector plate, and luminous towards the middle section of reflector plate.In addition, this backlight module can also comprise lens, is disposed on the light emitting path of light source.
In one embodiment of this invention, above-mentioned light source comprises a plurality of light-emitting components, is evenly distributed on the reflector plate.
In one embodiment of this invention, above-mentioned backlight module also comprises a plurality of fixtures, with the relative position of fixation reflex sheet and selective reflecting sheet.In addition, reflector plate and selective reflecting sheet can have a plurality of perforations respectively, and these fixtures run through these perforations and fixation reflex sheet and selective reflecting sheet, wherein to the maximum diameter of hole of small part perforation greater than the maximum outside diameter of these fixtures.
In one embodiment of this invention, above-mentioned reflector plate and selective reflecting sheet are deflection.
In one embodiment of this invention, above-mentioned backlight module also comprises support member, and it is disposed between reflector plate and the selective reflecting sheet to keep the gap.
In one embodiment of this invention, above-mentioned backlight module also comprises transparent support plate, is disposed between selective reflecting sheet and the support member.
In one embodiment of this invention, the total area of the photic zone in the unit area is increased progressively to the distance light source more nearby at a distance by the distance light source.
For reaching above-mentioned or other purposes, the present invention more proposes a kind of liquid crystal indicator, and it comprises display panels and above-mentioned two kinds of backlight modules any, and this backlight module is disposed at the display panels below.
In one embodiment of this invention, above-mentioned liquid crystal indicator can also comprise first polaroid and second polaroid.First polaroid is disposed between backlight module and the display panels, and second polaroid is disposed on the display panels.The linear polarization of the light by first polaroid and second polaroid is orthogonal.
The present invention is the collocation of adopting the collocation of reflector plate, reflective polaroid and phase delay chip or adopting reflector plate and selective reflecting sheet, and make backlight module can produce the even brightness area source, and do not need as known side incident type backlight module, to use light guide plate.Therefore, backlight module of the present invention has thinner thickness and the lighter advantage of weight.In addition, because therefore the element that backlight module of the present invention does not use light guide plate or diffusing panel etc. to be difficult to deflection can be designed to flexible musical form backlight module easily.Backlight module of the present invention also can be applicable to liquid crystal indicator.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the synoptic diagram of known side incident type backlight module.
Fig. 2 A is the diagrammatic cross-section of the backlight module of one embodiment of the invention.
Fig. 2 B is the schematic perspective view of the backlight module of Fig. 2 A.
Fig. 2 C is the relative position synoptic diagram between each rete of backlight module of Fig. 2 A.
Fig. 2 D is the skeleton view of Fig. 2 B.
Fig. 2 E is the synoptic diagram after the backlight module deflection shown in Fig. 2 A.
Fig. 3 is the relative position synoptic diagram between each rete in the backlight module of another embodiment of the present invention.
Fig. 4 is the diagrammatic cross-section of the backlight module of further embodiment of this invention.
Fig. 5 is the diagrammatic cross-section of the backlight module of yet another embodiment of the invention.
Fig. 6 is the diagrammatic cross-section of the backlight module of another embodiment of the present invention.
The diagrammatic cross-section of the backlight module of Fig. 7 A one embodiment of the invention.
Fig. 7 B is the relative position synoptic diagram between each rete of backlight module of Fig. 3 A.
Fig. 8 is the diagrammatic cross-section of the backlight module of another embodiment of the present invention.
Fig. 9 is the diagrammatic cross-section of the backlight module with transparent support plate of the another example of the present invention.
Figure 10 is the diagrammatic cross-section of the backlight module in yet another embodiment of the invention.
Figure 11 is the synoptic diagram of the liquid crystal indicator of one embodiment of the invention.
Figure 12 is the synoptic diagram of the liquid crystal indicator of other embodiments of the invention.
Description of reference numerals
100: side incident type backlight module 110: lampshade
114: incidence surface 116: exiting surface
120: cathode fluorescent tube 130: light guide plate
140: blooming piece
300,300a, 300b, 300c, 400,400a, 400b, 400c: backlight module
310: reflector plate 320,320a: first reflective polaroid
322,362: linear polarization 324,364: circular polarization
330,430: support member 340,340a, 440,440a: light source
342,442: light-emitting component 350: phase delay chip
352: phase delay area 352a: fast axle
354: non-phase delay area 360,360a: second reflective polaroid
370,450: fixture 380,460: gap
390:1/4 wavelength phase delay chip 392,470: lens
394,490: transparent support plate 396,480: perforation
396a: the first perforation 396b: second perforation
410: reflector plate 420: the selective reflecting sheet
422: photic zone 424: reflective areas
500,500a: liquid crystal indicator 510: display panels
520: 530: the first polaroids of backlight module
540: the second polaroid A: light
B: maximum diameter of hole C: maximum outside diameter
D: aperture
Embodiment
Fig. 2 A is the diagrammatic cross-section of the backlight module of one embodiment of the invention, and Fig. 2 B is the schematic perspective view of the backlight module of Fig. 2 A.Please refer to Fig. 2 A and Fig. 2 B, backlight module 300 comprises reflector plate 310, first reflective polaroid 320, light source 340, phase delay chip 350 and second reflective polaroid 360.First reflective polaroid 320 is disposed at reflector plate 310 tops, and forms gap 380 with reflector plate 310.Light source 340 is disposed between the reflector plate 310 and first reflective polaroid 320, in order to light A to be provided.Light source 340 is to be positioned at the edge of reflector plate 310 and luminous towards the middle section of reflector plate 310 in the present embodiment.In addition, light source 340 comprises at least one light-emitting component, light-emitting component can be that (light emitting diode, LED), cathode fluorescent tube or other suitable light sources, and the light source 340 shown in Fig. 2 B is to comprise that a plurality of light emitting diodes are example for light emitting diode.Phase delay chip 350 is disposed on first reflective polaroid 320, and second reflective polaroid 360 is disposed on the phase delay chip 350.That is phase delay chip 350 is disposed between first reflective polaroid 320 and second reflective polaroid 360.
In the present embodiment, backlight module 300 can also comprise at least one support member 330, and it is disposed between the reflector plate 310 and first reflective polaroid 320 to keep gap 380.Support member 330 can be made of the material with light transmission or reflective, and the quantity of support member 330 can optionally increase.In addition, backlight module 300 can also comprise a plurality of fixtures 370, with the relative position of fixation reflex sheet 310, first reflective polaroid 320, phase delay chip 350 and second reflective polaroid 360.Fixture 370 for example is the corner that is positioned at these diaphragms, shown in Fig. 2 B.
Fig. 2 C is the relative position synoptic diagram between each rete in the backlight module of Fig. 2 A, does not illustrate light source, support member and the fixture of backlight module among Fig. 2 C.Please refer to Fig. 2 A and Fig. 2 C, phase delay chip 350 has a plurality of phase delay area 352 and at least one non-phase delay area 354, wherein the light A that provides of light source 340 via the effect of phase delay area 352 by second reflective polaroid 360.The generation type of phase delay chip 350 for example is that the phase delay material selectivity is printed on the transparent membrane, be printed on the phase delay material locate be phase delay area 352, and do not have that the print position postpones material locate to be non-phase delay area 354.In the present embodiment, the total area of a plurality of phase delay area 352 in the unit area of phase delay chip 350 can be increased progressively to distance light source 340 more nearby at a distance by distance light source 340, and this can be reached by multiple different method for designing.For example, the area of single phase delay area 352 is increased progressively to distance light source 340 more nearby at a distance by distance light source 340.Perhaps, the area of each phase delay area 352 is equally big, but the quantity of the phase delay area 352 of unit area is increased progressively to distance light source 340 more nearby at a distance by distance light source 340.
In the present embodiment, second reflective polaroid 360 and first reflective polaroid 320 for example are the line polaroid, shown in Fig. 2 C, and light A is orthogonal with the linear polarization 362 of the part of passing through second reflective polaroid 360 by the linear polarization 322 of the part of first reflective polaroid 320.In addition, in the present embodiment, phase delay chip 350 for example is 1/2 wavelength phase delay chip, that is phase delay area 352 for example is 1/2 wavelength phase delay area.Phase delay area 352 has fast axle 352a and slow axis (not illustrating), wherein fast axle 352a and slow axis quadrature, and the light A of the parallel slow axis of direction of an electric field can spend than the phase lag 180 of the light A of the parallel fast 352a of direction of an electric field by phase delay area 352 its phase places of back.Fast axle 352a can be configured to the linear polarization 362 of the linear polarization 322 of light A by first reflective polaroid 320 and the light A by second reflective polaroid 360 and respectively presss from both sides on the directions of 45 degree.Thus, light A passes through the part of first reflective polaroid 320 after passing through phase delay area 352, and its linear polarization can be rotated by 90 degrees and follow by second reflective polaroid 360.Yet light A can not change its linear polarization by the part of non-phase delay area 354, so can can't be passed through by 360 reflections of second reflective polaroid.After passing through the phase delay chip 350 and first reflective polaroid 320, the sheet 310 that can be reflected reflects light A, and can be utilized once more by the part of second reflective polaroid, 360 reflections.In addition, because the total area of a plurality of phase delay area 352 in the unit area is increased progressively to distance light source 340 more nearby at a distance by distance light source 340, so can be similar to apart from light source 340 unit area luminous flux at a distance at distance light source 340 unit area luminous flux more nearby by the light A of second reflective polaroid 360.Thus, just can form the even brightness area source.
Fig. 2 D is the skeleton view of Fig. 2 B, and Fig. 2 E is the synoptic diagram after the backlight module deflection shown in Fig. 2 A.Please refer to Fig. 2 A, Fig. 2 B, Fig. 2 D and 2E, in the present embodiment, reflector plate 310, first reflective polaroid 320, phase delay chip 350 and second reflective polaroid 360 can have a plurality of perforations 396 respectively.Fixture 370 passes these perforations 396 and fixation reflex sheet 310, first reflective polaroid 320, phase delay chip 350 and second reflective polaroid 360.The above-mentioned diaphragm that these are fixed for example has flexibility, and perforation 396 can be divided into the first perforation 396a and the second perforation 396b.The maximum diameter of hole B of the second perforation 396b is greater than the maximum outside diameter C of fixture 370.For instance, the second perforation 369b can be made the strip shown in Fig. 2 B and Fig. 2 G, and when backlight module 300 deflections (shown in Fig. 2 H), fixture 370 can be in the second perforation 396b radially sliding along maximum diameter of hole B.Then be similar to the maximum outside diameter C of fixture 370 as for the aperture D of the first perforation 396a, can make fixture 370 have good fixed effect.Via the collocation of the first perforation 396a, the second perforation 396b and fixture 370, backlight module 300 not only is suitable for deflection, and each diaphragm of backlight module 300 can be fixed well.
Hold above-mentioned, the present invention adopts the collocation of reflector plate 310, first reflective polaroid 320, phase delay chip 350 and second reflective polaroid 360 and makes backlight module 300 can produce the even brightness area source, and does not need to use thick and heavy light guide plate as known side incident type backlight module.Therefore, backlight module 300 has thinner thickness and the lighter advantage of weight.In addition, because therefore the element that backlight module 300 does not use light guide plate or diffusing panel etc. to be difficult to deflection can be designed to flexible musical form backlight module easily.Moreover, when the size of backlight module 300 is big when being applied to large-sized liquid crystal indicator (as), must not consider the problem of the low and easy warpage of the making yield rate of large-size light-conducting plate because of not having light guide plate.
Fig. 3 is the relative position synoptic diagram between each rete in the backlight module of another embodiment of the present invention, does not illustrate light source, support member and the fixture of backlight module among Fig. 3.Please refer to Fig. 3, in the present embodiment, the second reflective polaroid 360a and the first reflective polaroid 320a are the rotatory polarization sheet, and light A is opposite each other by the circular polarization 324,364 of the part of the first reflective polaroid 320a and the second reflective polaroid 360a.For instance, one for clockwise direction another is counterclockwise, and the circular polarization by the light A after the phase delay area 352 can with pass through preceding opposite.Thus, the light A by phase delay area 352 can continue by the second reflective polaroid 360a, and the light A by non-phase delay area 352 then can be reflected by the second reflective polaroid 360a.After passing through the phase delay chip 350 and the first reflective polaroid 320a, the sheet 310 that can be reflected reflects, and this light A is utilized once more by the light A of second reflective polaroid 360a reflection.In addition, can on this second reflective polaroid 360a, dispose a slice 1/4 wavelength phase delay chip 390.From the light A of the second reflective polaroid 360a through 1/4 wavelength phase delay chip 390 after, can be linear polarization state by the circular polarization state-transition, this is applicable to the display panels that whether passes through to decide bright dark state that utilizes linearly polarized light, for example stable twisted nematic (twisted nematic mode) display panels, copline conversion hysteria (in-plane switching mode) display panels or vertical orientation type (verticalaligment) display panels etc.
Fig. 4 is the diagrammatic cross-section of the backlight module of further embodiment of this invention.Please refer to Fig. 2 A and Fig. 4, backlight module 300 is roughly the same with backlight module 300a, and its difference is in backlight module 300a and also comprises lens 392, is disposed on the light emitting path of light source 340.Lens 392 are in order to the direction of the light A that sent of control light source 340, and then improve the utilization factor of backlight module 300a to light source 340.
Fig. 5 is the diagrammatic cross-section of the backlight module of yet another embodiment of the invention.Please refer to Fig. 2 A and Fig. 5, backlight module 300 is roughly the same with backlight module 300b, its difference part is that backlight module 300b also comprises transparent support plate 394, is disposed between first reflective polaroid 320 and the support member 330 to increase the intensity of backlight module 300b.This transparent support plate 394 is particularly useful in the large-scale backlight module.Transparent support plate 394 for example is acrylic block or the made plate of other transparent materials.
It should be noted that it is the edge (being the configuration mode of side incident type) that is disposed at reflector plate 310 that the present invention does not limit light source 340 (please refer to Fig. 2 A).In another embodiment of the present invention, as shown in Figure 6, the light source 340a of backlight module 300c can comprise a plurality of light-emitting components 342, is evenly distributed in (being the configuration mode of straight-down negative) on the reflector plate 310.Light-emitting component 342 for example is light emitting diode or cathode fluorescent tube.
Fig. 7 A is the diagrammatic cross-section of the backlight module of one embodiment of the invention, and Fig. 7 B is the relative position synoptic diagram between each rete of backlight module of Fig. 7 A.Please refer to Fig. 7 A and Fig. 7 B, backlight module 400 comprises reflector plate 410, selective reflecting sheet 420 and at least one light source 440.Reflector plate 410 can be with the light A reflection from light source 440.Selective reflecting sheet 420 is disposed at reflector plate 410 tops, and has a plurality of photic zones 422 and at least one reflective areas 424.Selective reflecting sheet 420 forms gap 460 with reflector plate 410.Photic zone 422 for example is that reflectorized material (as metal) selectivity is plated on the transparent membrane with the generation type of reflective areas 424, be coated with reflectorized material locate be reflective areas 424, and do not plate reflectorized material locate to be photic zone 422.Light source 440 is disposed at crack 460 between reflector plate 410 and the selective reflecting sheet 420, in order to light A to be provided.Light source 440 for example is to be positioned at the edge of reflector plate 410 and luminous towards the middle section of reflector plate 410.In addition, light source 440 comprises at least one light-emitting component, and light-emitting component can be light emitting diode, cathode fluorescent tube or other suitable light sources.
In the present embodiment, backlight module 400 can also comprise at least one support member 430, and it is disposed between reflector plate 410 and the selective reflecting sheet 420 to keep gap 460, and wherein support member 430 for example is made of the material with light transmission or reflective.In addition, backlight module 400 can also comprise a plurality of fixtures 450, and with the relative position of fixation reflex sheet 410 with selective reflecting sheet 420, and fixture 450 for example is the corner that is positioned at these diaphragms.
The part light A that light source 440 is sent can pass through photic zone 422, and another part can be reflected sheet 410 reflections again to utilize once more after being reflected by reflective areas 424.In the present embodiment, the total area of a plurality of photic zones 422 in the unit area can be increased progressively to distance light source 440 more nearby at a distance by distance light source 440, and the method for designing of the quantity of the position of photic zone 422, size and unit area is as the method for designing of the phase delay area 352 (please refer to Fig. 2 C) of backlight module 300.Thus, just can make backlight module 400 form the even brightness area source.
In addition, reflector plate 410 and selective reflecting sheet 420 can have a plurality of perforations 480 respectively, and fixture 450 passes these perforations 480 with fixation reflex sheet 410 and selective reflecting sheet 420.Moreover reflector plate 410 and selective reflecting sheet 420 can have flexibility.The external diameter of the shape of perforation 480 and aperture and fixture 450 is respectively similar in appearance to the shape of the perforation 396 of backlight film group 300 (please refer to Fig. 2 B and Fig. 2 D) and the external diameter C of aperture and fixture 370.
Fig. 8 is the diagrammatic cross-section of the backlight module of another embodiment of the present invention.Please refer to Fig. 7 A and Fig. 8, backlight module 400a and backlight module 400 are roughly the same, and its difference is in backlight module 400a and also comprises lens 470, are disposed on the light emitting path of light source 440, with the direction of the light A that sent of control light source 440.
Fig. 9 is the diagrammatic cross-section of the backlight module of the another example of the present invention.Please refer to Fig. 7 A and Fig. 9, backlight module 400b and backlight module 400 are roughly the same, and its difference is in backlight module 400b and also comprises transparent support plate 490, are disposed between selective reflecting sheet 420 and the support member 430 to increase the intensity of backlight module 400.This transparent support plate 490 is particularly useful in the large-scale backlight module.Transparent support plate 490 for example is transparent acrylic (acryl) plate or the made plate of other transparent materials.
It should be noted that it is the edge (being the configuration mode of side incident type) that is disposed at reflector plate 410 that the present invention does not limit light source 440 (please refer to Fig. 7 A).In an embodiment more of the present invention, as shown in figure 10, the light source 440a of backlight module 400c can comprise a plurality of light-emitting components 442, is evenly distributed in (being the configuration mode of straight-down negative) on the reflector plate 410.Light-emitting component 442 for example is light emitting diode or cathode fluorescent tube.
Other do not have the backlight module of light guide plate to backlight module 400～400c for the present invention, and it has the advantage identical with backlight module 300～300c respectively.
Figure 11 is the synoptic diagram of the liquid crystal indicator of one embodiment of the invention.Please refer to Fig. 4 A, the backlight module 520 that liquid crystal indicator 500 of the present invention comprises display panels 510 and is disposed at these display panels 510 belows.Backlight module 520 can be one of them or other backlight modules with feature of the present invention of backlight module 300～300c, the 400～400c of aforementioned each embodiment.In addition, backlight module 520 is to dispose towards display panels 510 with its light direction, that is the area source that backlight module 520 is provided is to send from a side of contiguous display panels 510.In addition, if display panels 510 is a deflection, then entire liquid crystal display device 500 all can become deflection.
Figure 12 is the synoptic diagram of the liquid crystal indicator of other embodiments of the invention.Please refer to Figure 11 and Figure 12, liquid crystal indicator 500a and liquid crystal indicator 500 are roughly the same, and its difference part is that liquid crystal indicator 500a also comprises first polaroid 530 and second polaroid 540.First polaroid 530 is disposed between backlight module 520 and the display panels 510, and second polaroid 540 is disposed on the display panels 510.In addition, the linear polarization of the light by first polaroid 530 and second polaroid 540 is orthogonal.First polaroid 530 and second polaroid 540 are applicable to the display panels that whether passes through to decide bright dark state that utilizes linearly polarized light.
In sum, backlight module of the present invention is the collocation of adopting the collocation of reflector plate, reflective polaroid and phase delay chip or adopting reflector plate and selective reflecting sheet, and make the backlight film group can produce the even brightness area source, and need not use light guide plate or diffusing panel.Therefore, backlight module of the present invention has thinner thickness and the lighter advantage of weight.In addition, because therefore the element that backlight module of the present invention does not use light guide plate or diffusing panel etc. to be difficult to deflection can be designed to flexible musical form backlight module easily.Moreover the design of the perforation shape of each diaphragm can make backlight module of the present invention further have good flexibility and can fix each diaphragm simultaneously reliably.In addition, backlight module of the present invention also can be applicable to liquid crystal indicator, and backlight module is if collocation deflection display panels then can be made into the deflection liquid crystal indicator.In addition, when the present invention was applied to large-sized liquid crystal indicator, backlight module must not considered the problem of the low and easy warpage of the making yield rate of large-size light-conducting plate because of not having light guide plate.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim person of defining.
Claims (15)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101028131A CN101303478B (en) | 2007-05-09 | 2007-05-09 | Liquid crystal display device and its backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101028131A CN101303478B (en) | 2007-05-09 | 2007-05-09 | Liquid crystal display device and its backlight module |
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| CN101303478A CN101303478A (en) | 2008-11-12 |
| CN101303478B true CN101303478B (en) | 2011-09-14 |
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| CN102155664A (en) * | 2011-04-13 | 2011-08-17 | 胡文松 | 360° high-intensity LED bulb with full beam angle |
| CN104676379B (en) * | 2015-02-26 | 2017-06-30 | 深圳市华星光电技术有限公司 | Backlight module and the liquid crystal display device comprising it |
| CN108037619B (en) * | 2018-01-25 | 2020-08-04 | 惠州市华星光电技术有限公司 | Backlight module and liquid crystal display |
| CN114675449B (en) * | 2020-12-24 | 2024-04-26 | 深圳市前海誉卓科技有限公司 | Polarizer for wide-viewing angle liquid crystal display |
| CN114296171A (en) * | 2021-12-27 | 2022-04-08 | 合肥维信诺科技有限公司 | Polarizer and display device |
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|---|---|---|---|---|
| EP0573905A1 (en) * | 1992-06-08 | 1993-12-15 | Minnesota Mining And Manufacturing Company | Retroreflecting polarizer for presentation systems |
| CN1144913A (en) * | 1994-05-27 | 1997-03-12 | 佳能株式会社 | Backlighting devices for displays |
| CN1191610A (en) * | 1995-06-26 | 1998-08-26 | 美国3M公司 | Liquid crystal display projection system using multilayer optical film polarizers |
| CN1512230A (en) * | 2002-12-27 | 2004-07-14 | 鸿富锦精密工业（深圳）有限公司 | Back light module |
| CN1896837A (en) * | 2005-07-13 | 2007-01-17 | 奇菱科技股份有限公司 | Backlight module without light guide plate and diffuser plate |
-
2007
- 2007-05-09 CN CN2007101028131A patent/CN101303478B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0573905A1 (en) * | 1992-06-08 | 1993-12-15 | Minnesota Mining And Manufacturing Company | Retroreflecting polarizer for presentation systems |
| CN1144913A (en) * | 1994-05-27 | 1997-03-12 | 佳能株式会社 | Backlighting devices for displays |
| CN1191610A (en) * | 1995-06-26 | 1998-08-26 | 美国3M公司 | Liquid crystal display projection system using multilayer optical film polarizers |
| CN1512230A (en) * | 2002-12-27 | 2004-07-14 | 鸿富锦精密工业（深圳）有限公司 | Back light module |
| CN1896837A (en) * | 2005-07-13 | 2007-01-17 | 奇菱科技股份有限公司 | Backlight module without light guide plate and diffuser plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101303478A (en) | 2008-11-12 |
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