CN101561583A - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN101561583A CN101561583A CN 200810091786 CN200810091786A CN101561583A CN 101561583 A CN101561583 A CN 101561583A CN 200810091786 CN200810091786 CN 200810091786 CN 200810091786 A CN200810091786 A CN 200810091786A CN 101561583 A CN101561583 A CN 101561583A
- Authority
- CN
- China
- Prior art keywords
- those
- pointolites
- diffusion sheet
- sheet material
- light sources
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight module and a liquid crystal display device. The backlight module comprises a lamphouse, a diffusion disk and a plurality of light source groups, wherein the lamphouse is provided with a bottom and an opening which are opposite to each other, the diffusion disk is arranged on the opening, and the light source groups are arranged on the bottom of the lamphouse. Besides, each light source group comprises a plurality of point light sources which are arranged along a first direction; and when penetrating through the diffusion disk, the light emitted by the point light sources has at least three pointing directions in a sectional plane which is perpendicular to the diffusion disk and passes through the point light sources. Besides, the invention provides a liquid crystal display device provided with the backlight module. The backlight module can be applicable to the liquid crystal display device provided with various display modes, and a plurality of display modes can be switched by the cooperative switching of the backlight module with different light-emitting directions and panel display signals.
Description
Technical field
The present invention relates to a kind of display device, and be particularly related to a kind of liquid crystal indicator and backlight module thereof.
Background technology
LCD utilizes kenel can slightly be divided into three kinds of reflective liquid-crystal display (ReflectiveLCD), transmissive type liquid crystal display (Transmissive LCD) and transflective liquid crystal displays according to its light source, wherein the transmission-type or the LCD of half-transmission half-reflection type mainly are made of a liquid crystal panel and a backlight module.Liquid crystal panel is made of two transparency carriers and the liquid crystal layer that is disposed between this two transparency carrier, and backlight module then is in order to provide this liquid crystal panel required area source, so that LCD reaches the effect of demonstration.
Along with the progress of display technique, the existing at present LCD that can demonstrate stereoscopic picture plane.The LCD of this type mainly is to demonstrate different pictures at user's left eye respectively with right eye, is a pair of picture that parallax is arranged with the picture that allows user's left eye and right eye be seen.For the demand in response to this kind display technique, the backlight liquid crystal display module of this type need be designed to two light directions, switches light direction with the picture that goes out according to liquid crystal display displays.
Fig. 1 is the section signal of the backlight module of known a kind of changeable light direction.Please refer to Fig. 1, known backlight module 100 comprises two light-emitting diode (LED) modules (LED module) 110a, 110b, two light-guide devices 120, a reflector plate 130 and a prismatic lens 140.Wherein, light-emitting diode (LED) module 110a is relative with light-emitting diode (LED) module 110b, and before this two light-guide device 120 is disposed at the opening of light-emitting diode (LED) module 110a, 110b respectively, and be positioned on the reflector plate 130.140 of prismatic lenses are relative with reflector plate 130.
Hold above-mentioned, the picture that goes out when liquid crystal display displays is during at user's left eye, light-emitting diode (LED) module 110a can be luminous, light-emitting diode (LED) module 110b is then not luminous, so the light that sent of light-emitting diode (LED) module 110a by the light direction behind the prismatic lens 140 promptly towards user's left eye.Otherwise, the picture that goes out when liquid crystal display displays is during at user's right eye, light-emitting diode (LED) module 110b can be luminous, and light-emitting diode (LED) module 110a is then not luminous, so the light that sent of light-emitting diode (LED) module 110b by the light direction behind the prismatic lens 140 promptly towards user's right eye.
Yet it is relatively poor that this kind light emitting source is positioned at the uniformity coefficient of the area source that the backlight module 100 of both sides provided.For instance, when light-emitting diode (LED) module 110a is luminous, in order to compensate light intensity and the phenomenon that reduce elongated along with distance light-emitting diode (LED) module 110a, reflector plate 130 is apart from the light-emitting diode (LED) module 110a part far away that heals, its reflectivity should be higher, so that the light intensity from prismatic lens 140 left sides to the right side outgoing is comparatively average.But, in the case, when light-emitting diode (LED) module 110b is luminous, then since reflector plate 130 apart from the light-emitting diode (LED) module 110b near part that heals, its reflectivity is higher, thus the general of the light intensity from prismatic lens 140 right sides to the left side outgoing more and more a little less than.Therefore, the uniformity coefficient of the area source that provided of known backlight module 100 is relatively poor.In addition, though increase the uniformity coefficient that the distance of being separated by between prismatic lens 140 and the reflector plate 130 can be improved area source, can increase the thickness of backlight module 100.
In addition, the LCD that has plurality of display modes (as normal displaying mode, stereo display pattern, narrow visual angle display mode and two picture display modes etc.) at present respectively.But the light direction of known backlight module 100 only has two kinds, thus be only applicable to can demonstrate in the LCD of stereoscopic picture plane, and can't be applicable to simultaneously in the LCD with plurality of display modes.
Summary of the invention
The purpose of this invention is to provide a kind of backlight module, it has multiple light direction can be for switching.
Another object of the present invention provides a kind of liquid crystal indicator, and its backlight module can adjust light direction according to different display modes.
Based on above-mentioned and other purposes, the present invention proposes a kind of backlight module, and it comprises a lamp box, a diffusion sheet material and a plurality of light sources.Wherein, lamp box has a relative bottom and an opening, and the diffusion sheet material is to be disposed at opening part, and light sources is to be disposed at the lamp box bottom.In addition, each light sources comprises a plurality of pointolites of arranging along a first direction, and at vertical diffusion sheet material and by in the cross section of these pointolites, and the directive property direction during light incident diffusion sheet material that these pointolites sent has three kinds of directions at least.
In one embodiment of this invention, the pointolite of above-mentioned each light sources comprises a plurality of first pointolites, a plurality of second pointolite and a plurality of thirdly light source.Wherein, first pointolite sent light incident diffusion sheet material the time the directive property direction and the angle between the normal of diffusion sheet material be θ
1Angle between directive property direction when second pointolite and light incident diffusion sheet material that thirdly light source sent and the normal of diffusion sheet material is θ
2, and θ
1＜θ
2Directive property direction during light incident diffusion sheet material that the directive property direction during light incident diffusion sheet material that in addition, thirdly light source sent and second pointolite are sent is not parallel.
In one embodiment of this invention, the arrangement mode of the pointolite of above-mentioned each light sources is according to the order repeated arrangement of light source, first pointolite and second pointolite thirdly.And, in regular turn the thirdly light source of Pai Lieing, first pointolite and second pointolite sent light incident diffusion sheet material the time the directive property direction be to be divergent shape.
In one embodiment of this invention, in above-mentioned each light sources, first pointolite of arranging along first direction be first pointolite, second pointolite with light source thirdly one of them.
In one embodiment of this invention, above-mentioned first pointolite, second pointolite are identical with the lighting angle of light source thirdly.
In one embodiment of this invention, above-mentioned first pointolite, second pointolite are less than or equal to 15 degree with the lighting angle of light source thirdly.
In one embodiment of this invention, the pointolite of above-mentioned each light sources also comprises a plurality of the 4th pointolites and a plurality of the 5th pointolite.Wherein, the 4th pointolite and the 5th pointolite sent light incident diffusion sheet material the time the directive property direction and the angle between the normal of diffusion sheet material be θ
3, and θ
2＜θ
3In addition, the 5th pointolite sent light incident diffusion sheet material the time the directive property direction and the 4th pointolite sent light incident diffusion sheet material the time the directive property direction not parallel.
In one embodiment of this invention, the arrangement mode of the pointolite of above-mentioned each light sources is according to the 5th pointolite, the order repeated arrangement of light source, first pointolite, second pointolite and the 4th pointolite thirdly.In addition, the 5th pointolite of arranging in regular turn, thirdly light source, first pointolite, second pointolite and the 4th pointolite sent light incident diffusion sheet material the time the directive property direction be to be divergent shape.
In one embodiment of this invention, in above-mentioned each light sources, first pointolite of arranging along first direction be first pointolite, second pointolite, thirdly light source, the 4th pointolite and the 5th pointolite one of them.
In one embodiment of this invention, the first above-mentioned pointolite, second pointolite are identical with the lighting angle of light source thirdly, and the 4th pointolite is identical with the lighting angle of the 5th pointolite, and the lighting angle of first pointolite is less than the lighting angle of the 4th pointolite.
In one embodiment of this invention, the first above-mentioned pointolite, second pointolite are less than or equal to 15 degree with the lighting angle of light source thirdly, and the lighting angle of the 4th pointolite and the 5th pointolite is less than or equal to 60 and spends.
In one embodiment of this invention, each above-mentioned light sources also comprises a pedestal that is disposed at the lamp box bottom.This pedestal has a plurality of loading ends of arranging along first direction, and disposes a pointolite on each loading end.The normal vector of these loading ends has three kinds of directions at least, so that the directive property direction during the light incident diffusion sheet material that pointolite sent of each light sources has three kinds of directions at least.
In one embodiment of this invention, above-mentioned each light sources also comprises a plurality of holders and a plurality of reflecting element.Wherein, holder is to be arranged in the lamp box bottom along first direction, and the pointolite of each light sources is to be disposed on the sidewall of holder.In addition, reflecting element is to be arranged in lamp box bottom along first direction, and a reflecting surface of each reflecting element is that one of them is relative with pointolite.The normal vector of these reflectings surface has three kinds at least, and the directive property direction so that the light that pointolite sent of each light sources is reflected after the element reflects has three kinds of directions at least.
In one embodiment of this invention, the sidewall of above-mentioned holder and lamp box bottom vertical.
In one embodiment of this invention, all dispose a pointolite on the two side that above-mentioned holder is relative.
In one embodiment of this invention, above-mentioned each light sources also comprises a plurality of rotating mechanisms, a plurality of holder and a plurality of reflecting element.Wherein, rotating mechanism is to be arranged in the lamp box bottom along first direction.In addition, holder is disposed at these rotating mechanisms respectively on one of them, and the pointolite of each light sources is to be disposed on the sidewall of these holders.Rotating mechanism is suitable for rotating with folded angle between change holder and the lamp box bottom, and then makes the angle between holder and the lamp box bottom have three kinds at least.In addition, reflecting element is to be arranged in lamp box bottom along first direction, and each reflecting element is that one of them is relative with these pointolites, and these reflecting elements are parallel to each other.
In one embodiment of this invention, above-mentioned each rotating mechanism comprises a bearing and a servomechanism.Wherein, bearing is to connect corresponding holder, and servomechanism is the rotation in order to the control bearing.
In one embodiment of this invention, all dispose a pointolite on the two side that above-mentioned each holder is relative.
In one embodiment of this invention, above-mentioned pointolite comprises light emitting diode.
The present invention more proposes a kind of liquid crystal indicator, and it comprises a display panels and above-mentioned backlight module.Wherein, backlight module is a side that is disposed at display panels, to provide display panels required area source.
The present invention proposes a kind of backlight module again, and it comprises a lamp box, a diffusion sheet material and a plurality of light sources.Wherein, lamp box has a relative bottom and an opening, and the diffusion sheet material is to be disposed at opening part, and light sources is to be disposed at the lamp box bottom.In addition, each light sources comprises a plurality of rotating mechanisms, a plurality of holder and a plurality of pointolite.Wherein, rotating mechanism is to be arranged in lamp box bottom along a first direction, and holder is to be disposed at these rotating mechanisms respectively on one of them, and each rotating mechanism is suitable for rotating configuration holder thereon.Pointolite is to be disposed on these holders.
In one embodiment of this invention, above-mentioned each light sources also comprises a plurality of reflecting elements that are arranged in the lamp box bottom along first direction, and pointolite is to be disposed on the sidewall of holder.One of them is relative with pointolite respectively for these reflecting elements.
In one embodiment of this invention, all dispose a pointolite on the two side that above-mentioned each holder is relative.
In one embodiment of this invention, above-mentioned each rotating mechanism has a rotating shaft.
In one embodiment of this invention, above-mentioned each rotating mechanism comprises a bearing and a servomechanism.Bearing is to connect corresponding holder, and servomechanism is the rotation in order to the control bearing.
In one embodiment of this invention, above-mentioned pointolite comprises light emitting diode.
The present invention reintroduces a kind of liquid crystal indicator, and it comprises a display panels and above-mentioned second kind of backlight module.This backlight module is a side that is disposed at display panels, to provide display panels required area source.
In the present invention, because the directive property direction during the light incident diffusion sheet material that pointolite sent of each light sources has three kinds of directions at least, therefore can open specific pointolite, to adjust the light direction of backlight module according to the display mode of 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 diagram, be described in detail below.
Description of drawings
Fig. 1 is the diagrammatic cross-section of the backlight module of known a kind of changeable light direction.
Fig. 2 is the diagrammatic cross-section of the liquid crystal indicator of first embodiment of the invention.
Fig. 3 A is the lamp box of Fig. 2 and the vertical view of light sources.
Fig. 3 B is the diagrammatic cross-section along the being seen backlight module of I-I ' line among Fig. 3 A.
Fig. 3 C is the synoptic diagram of the lighting angle of first pointolite to the, five pointolites.
Fig. 4 is the diagrammatic cross-section of each light sources in the first embodiment of the invention.
Fig. 5 is the partial cutaway schematic of the another kind of backlight module of first embodiment of the invention.
Fig. 6 is the partial cutaway schematic of another backlight module of first embodiment of the invention.
Fig. 7 be second embodiment of the invention liquid crystal indicator diagrammatic cross-section.
Fig. 8 is the partial cutaway schematic of backlight module among Fig. 7.
Fig. 9 is the partial cutaway schematic of the another kind of backlight module of second embodiment of the invention.
Description of reference numerals
100,300,300a, 300b, 300c, 300d: backlight module
110a, 110b: light-emitting diode (LED) module
120: light-guide device
130: reflector plate
140: prismatic lens
200: liquid crystal indicator
210: display panels
212: the first substrates
214: the second substrates
216: liquid crystal layer
310: lamp box
312: the bottom
314: opening
320: the diffusion sheet material
330,330a, 330c: light sources
332: pointolite
332a: first pointolite
332b: second pointolite
332c: light source thirdly
332d: the 4th pointolite
332e: the 5th pointolite
333,333a～333e: directive property direction
334: pedestal
335: loading end
336,336a～336e: normal vector
337,337a～337e: reflecting element
337 ': reflecting surface
338: holder
340: rotating mechanism
341: rotating shaft
342: bearing
344: servomechanism
D1: first direction
θ
2～θ
3: angle
Embodiment
Fig. 2 is the diagrammatic cross-section of the liquid crystal indicator of first embodiment of the invention, and Fig. 3 A is the lamp box of Fig. 2 and the vertical view of light sources, and Fig. 3 B is the diagrammatic cross-section along the being seen backlight module of I-I ' line among Fig. 3 A.Please refer to Fig. 2 Fig. 3 A and Fig. 3 B, the liquid crystal indicator 200 of present embodiment comprises a display panels 210 and a backlight module 300, wherein backlight module 300 is sides that are disposed at display panels 210, to provide display panels 210 required area source.Display panels 210 comprise one first substrate 212, one second substrate 214 and be disposed at first substrate 212 and second substrate 214 between a liquid crystal layer 216.In the present embodiment, first substrate 212 can be colorful filter array substrate, and second substrate 214 can be thin-film transistor array base-plate 214, but not as limit.In addition, backlight module 300 comprises a lamp box 310, a diffusion sheet material 320 and a plurality of light sources 330.Lamp box 310 has a relative bottom 312 and an opening 314, and diffusion sheet material 320 for example is diffusing panel or diffusion disk, is to be disposed at opening 314 places, and light sources 330 is to be disposed at lamp box bottom 312.In addition, each light sources 330 comprises a plurality of pointolites 332 of arranging along a first direction D1, and these pointolites 332 for example are light emitting diode or other pointolites that is suitable for.The first direction D1 of indication is preferably with respect to the direction of user's sight line level herein, that is the user is when facing the display frame of liquid crystal indicator 200, with two of users' the parallel direction of line.In addition, at vertical diffusion sheet material 320 and by in the cross section of these pointolites 332, the directive property direction 333 during light incident diffusion sheet material 320 that these pointolites 332 are sent has three kinds of directions at least.
In first embodiment, the pointolite 332 of above-mentioned each light sources 330 comprises a plurality of first pointolite 332a, a plurality of second pointolite 332b, a plurality of thirdly light source 332c, a plurality of the 4th pointolite 332d and a plurality of the 5th pointolite 332e.Wherein, the first pointolite 332a sent light incident diffusion sheet material 320 time directive property direction 333a and the angle between the normal of diffusion sheet material 320 be θ
1(θ in the present embodiment
1For example be 0 degree, so do not indicate among Fig. 3).The second pointolite 332b and thirdly light source 332c sent light incident diffusion sheet material 320 time directive property direction 333b, 333c and the angle between the normal of diffusion sheet material 320 be θ
2Angle between directive property direction 333d, 333e during light incident diffusion sheet material 320 that the 4th pointolite 332d and the 5th pointolite 332e are sent and the normal of diffusion sheet material 320 is θ
3, and θ
1＜θ
2＜θ
3In addition, thirdly light source 332c sent light incident diffusion sheet material 320 time directive property direction 333c and the second pointolite 332b sent light incident diffusion sheet material 320 time directive property 333b direction not parallel.Directive property direction 333d during light incident diffusion sheet material 320 that directive property direction 333e during light incident diffusion sheet material 320 that the 5th pointolite 332e is sent and the 4th pointolite 332d are sent is not parallel.
Hold above-mentionedly, the arrangement mode of the pointolite 332 of each light sources 330 for example is according to the 5th pointolite 332e, the order repeated arrangement of light source 332c, the first pointolite 332a, the second pointolite 332b and the 4th pointolite 332d thirdly.In addition, the 5th pointolite 332e that arranges in regular turn, thirdly light source 332c, the first pointolite 332a, the second pointolite 332b and the 4th pointolite 332d sent light incident diffusion sheet material 320 time directive property direction 333e, 333c, 333a, 333b, 333d be divergent shape.
Above-mentioned θ
2For example be 7 degree, and θ
3For example be 25 degree, but not as limit.In addition, please refer to Fig. 3 C, it is the synoptic diagram of the lighting angle of first pointolite to the, five pointolites.The first pointolite 332a, the second pointolite 332b all are ψ 1 for example with the lighting angle of light source 332c thirdly in the present embodiment, and the lighting angle of the 4th pointolite 332d and the 5th pointolite 332e for example all is ψ 2, and ψ 1 is less than ψ 2.In one embodiment, ψ 1 is less than or equal to 15 degree, and ψ 2 is less than or equal to 60 degree.
In the present invention, each light sources 330 can also comprise a pedestal 334 that is disposed at lamp box bottom 312.This pedestal 334 has a plurality of loading ends 335 of arranging along first direction D1, and disposes at least one pointolite 332 on each loading end 335.The normal vector 336 of these loading ends 335 has three kinds of directions at least, so that the directive property direction 333 during the light incident diffusion sheet material 320 that the pointolite 332 of each light sources 330 is sent has three kinds of directions at least.Incident angle and incident direction when in other words, the slope of each loading end 335 that in the present invention can be by pedestal 334 decides the directive property direction 333 incident diffusion sheet materials 320 of the light that pointolite 332 sent.Therefore, in first embodiment, the normal vector of the loading end 335 of pedestal 334 has five kinds (being normal vector 336a, 336b, 336c, 336d, 336e), and the directive property direction 333 of the light that each pointolite 332 is sent is parallel with the normal vector 336 of the loading end 335 at its place.What deserves to be mentioned is that pedestal 334 also can be one-body molded with lamp box bottom 312.For instance, pedestal 334 is directly to utilize lamp box bottom 312 impact briquetting modes are made.
In the present embodiment, the first pointolite 322a, the second pointolite 322b, thirdly light source 322c, the 4th pointolite 322d and the 5th pointolite 322e can open individually, therefore can open specific pointolite 322 according to the display mode of liquid crystal indicator 200.In more detail, when the display mode of liquid crystal indicator 200 is normal displaying mode, then open the first pointolite 322a, the second pointolite 322b, thirdly light source 322c, the 4th pointolite 322d and the 5th pointolite 322e simultaneously.When the display mode of liquid crystal indicator 200 is the stereo display pattern, then alternately open the second pointolite 322b and light source 322c thirdly, particularly, the then display frame of fluid,matching crystal device 200 and the alternately unlatching of the picture that liquid crystal indicator 200 can Alternation Display be viewed and admired for user's left eye and right eye, the second pointolite 332b of backlight module 200 and light source 332c thirdly.In addition, when the display mode of liquid crystal indicator 200 is narrow visual angle display mode, then open the first pointolite 322a, the second pointolite 322b and light source 322c thirdly simultaneously.When the display mode of liquid crystal indicator 200 is two picture display mode, then alternately open the 3rd, the 5th pointolite 322c, 322e and second, the 4th pointolite 322b, 322d, particularly, the picture that the picture that liquid crystal indicator 200 can Alternation Display be viewed and admired for the user in liquid crystal indicator 200 left sides and the user on liquid crystal indicator 200 right sides view and admire, the 3rd, the 5th pointolite 322c, the 322e and second of backlight module, the 4th pointolite 322b, 322d then fluid,matching crystal device 200 display frame and alternately open.
In addition, be positioned at the backlight module 100 (as shown in Figure 1) of both sides compared to the known luminescence source, because the pointolite 332 of the backlight module 300 of present embodiment is directly to be disposed at diffusion sheet material 320 belows, so the intensity of light after 320 outgoing of diffusion sheet material is comparatively average.In other words, the uniformity coefficient of the area source that provided of the backlight module 300 of present embodiment is preferred.Thus, do not need to increase again the uniformity coefficient that distance between diffusion sheet material 320 and the lamp box bottom 312 improves area source, so the thickness of the backlight module 300 of present embodiment can reduce.
What deserves to be mentioned is that in each light sources 330 of present embodiment, first pointolite 332 of arranging along first direction D1 is not defined as the 5th pointolite 332e.That is, in each light sources 330, first pointolite 332 of arranging along first direction D1 can be the first pointolite 332a, the second pointolite 332b, thirdly light source 332c, the 4th pointolite 332d and the 5th pointolite 332e one of them.
Fig. 4 is the section signal of each light sources in the first embodiment of the invention.Please refer to Fig. 2 and Fig. 4, in order further to improve the uniformity coefficient of area source, in each light sources 330, can be inequality along first pointolite 332 that first direction D1 arranges.In other words, in order further to improve the uniformity coefficient of area source, can make in the light sources 330 of Fig. 3 A top side to lower side, first pointolite 332 of arranging along first direction D1 is the 5th pointolite 332e, thirdly light source 332c, the first pointolite 332a, the second pointolite 332b and the 4th pointolite 332d in regular turn, promptly shown in the light sources 330 of Fig. 4 the top to below.
Be noted that, though in first embodiment, directive property direction 333 during light incident diffusion sheet material 320 that pointolite 332 is sent has five kinds of directions, but the present invention only qualified point light source 332 sent light incident diffusion sheet material 320 time directive property direction 333 have three kinds of directions at least.Those skilled in the art behind the reference present embodiment, when can be voluntarily according to demand and the directive property direction 333 during the light incident diffusion sheet material 320 that commit point light source 332 is sent needs several directions.For instance, if liquid crystal indicator 200 (as shown in Figure 2) only has narrow visual angle display mode and the stereo display pattern can be when switching, then the pointolite 332 of its backlight module of arranging in pairs or groups sent light incident diffusion sheet material 320 time directive property direction 333 three kinds (directive property direction 333a, 333b, 333c) of need only.Therefore, backlight module only need have the first pointolite 332a, the second pointolite 332b and light source 332c thirdly.
In the present invention, the directive property direction 333 in the time of also can making the light incident diffusion sheet material 320 that pointolite 332 sent by reflecting element has three kinds of directions at least.Please refer to Fig. 5, it is the part section signal of the another kind of backlight module of first embodiment of the invention.The light sources 330a of backlight module 300a also comprises a plurality of holders 338 and a plurality of reflecting element 337 except comprising a plurality of pointolites 332.Wherein, holder 338 is to be arranged in lamp box bottom 312 along first direction D1, and the sidewall of holder 338 for example is vertical with lamp box bottom 312.The pointolite 332 of each light sources 330a is to be disposed on the sidewall of holder 338.In addition, reflecting element 337 is to be arranged in lamp box bottom 312 along first direction D1, and a reflecting surface 337 ' of each reflecting element 337 is relative with a pointolite 332.The normal vector of the reflecting surface 337 ' of these reflecting elements 337 has three kinds of directions at least, and the directive property direction 333 so that the light that the pointolite 332 of each light sources 330a is sent is reflected after element 337 reflections has three kinds of directions at least.
Particularly, angle between the directive property direction 333a when the light incident diffusion sheet material 320 of desiring to make the first pointolite 332a to be sent and the normal of diffusion sheet material 320 is 0 when spending, the angle theta between reflecting element 337a relative with the first pointolite 332a and the lamp box bottom 312
4Be required to be 45 degree; When desire to make the second pointolite 332b and thirdly light source 332c sent light incident diffusion sheet material 320 time directive property direction 333b, 333c and the angle between the normal of diffusion sheet material 320 be 7 when spending, the angle theta between reflecting element 337b relative and the lamp box bottom 312 with the second pointolite 332b
5Be required to be 41.5, and and the angle theta between the reflecting element 337c that thirdly light source 332c is relative and the lamp box bottom 312
6Be required to be 48.5 degree; Angle between directive property direction 333d, the 333e when the light incident diffusion sheet material 320 of desiring to make the 4th pointolite 332d and the 5th pointolite 332e to be sent and the normal of diffusion sheet material 320 is 25 when spending, the angle theta between reflecting element 337d relative with the 4th pointolite 332d and the lamp box bottom 312
7Be required to be 32.5 degree, and the angle theta between reflecting element 337e relative with the 5th pointolite 332e and the lamp box bottom 312
8Be required to be 57.5 degree.
Be noted that the present invention does not limit the fixed form of reflecting element 337.For instance, in the present invention fixed pedestal (not illustrating) can be set in addition, so that reflecting element 337 is fixed on these fixed pedestals, or lamp box bottom 312 directly be struck out required angle, and reflecting element 337 is fixed in lamp box bottom 312.
Fig. 6 is the part section signal of another backlight module of first embodiment of the invention.Please refer to Fig. 6, backlight module 300b is similar to backlight module 300a shown in Figure 5, and different is in backlight module 300b, and holder 338 all disposes a pointolite 332 on the relative two side.Certainly, reflecting element 337 relative with each pointolite 332 and the angle between the lamp box bottom 312 need be looked demand and adjust, those skilled in the art with reference to should push away voluntarily after the explanation above each reflecting element 337 angle between 312 bottom lamp box, so will no longer describe in detail at this.
Second embodiment
Fig. 7 be second embodiment of the invention liquid crystal indicator diagrammatic cross-section, and Fig. 8 is the partial cutaway schematic of backlight module among Fig. 7.Please refer to Fig. 7, not the existing together of liquid crystal indicator 200 (as shown in Figure 2) of the liquid crystal indicator 200a of present embodiment and first embodiment only is backlight module, so following will be only describing at the backlight module 300c of the liquid crystal indicator 200a of present embodiment.In addition, in first embodiment and second embodiment, components identical will be represented with identical label, and hereinafter will omit the detailed description for similar elements.
The backlight module 300c of present embodiment comprises a lamp box 310, a diffusion sheet material 320 and a plurality of light sources 330c.Wherein, lamp box 310 has a relative bottom 312 and an opening 314, and diffusion sheet material 320 is to be disposed at opening 314 places, and light sources 330c is disposed at lamp box bottom 312.In addition, each light sources 330c comprises a plurality of rotating mechanisms 340, a plurality of holder 338 and a plurality of pointolite 332.Wherein, rotating mechanism 340 is to be arranged in lamp box bottom 312 along a first direction D1, and holder 338 is to be disposed at these rotating mechanisms 340 respectively on one of them, and each rotating mechanism 340 is suitable for rotating configuration holder 338 thereon.Pointolite 332 is to be disposed on these holders 338.
In the present embodiment, each light sources 330c can also comprise a plurality of reflecting elements 337 that are arranged in lamp box bottom 312 along first direction D1, and pointolite 332 is to be disposed on the sidewall of holder 338.Each reflecting element 337 is relative with a pointolite 332.In addition, rotating mechanism 340 has a rotating shaft 341, and the axial and first direction D1 of rotating shaft 341 is orthogonal in fact.Particularly, each rotating mechanism 340 comprises a bearing 342 and the servomechanism 344 with rotating shaft 341.Bearing 342 connects corresponding holder 338, and servomechanism 344 is the rotations in order to control bearing 342.
Each above-mentioned reflecting element 337 angle between 312 bottom lamp box for example all is identical, and the angle that the bearing 342 of each servomechanism 344 may command correspondence rotates, so that fixture 338 is along with bearing 342 turns to required angle, the angle between the directive property direction during the light incident diffusion sheet material 320 that so can reference mark light source 332 be sent and the normal of diffusion sheet material 320.Therefore, in the present embodiment, the directive property direction in the time of can making the light incident diffusion sheet material 320 that each pointolite 332 sent by the rotation of control bearing 342 has at least more than three kinds.In other words, the rotation by control bearing 342 can make backlight module 300c have identical light direction with the backlight module 300 shown in Fig. 3.
Fig. 9 is the partial cutaway schematic of the another kind of backlight module of second embodiment of the invention.Please refer to Fig. 9, the backlight module 300d of present embodiment is similar to the backlight module 300c of Fig. 8, and the holder 338 that only is backlight module 300d of not existing together all disposes a pointolite 332 on the relative two side.
In sum, backlight module of the present invention and liquid crystal indicator have following advantage at least:
1. because the directive property direction during the light incident diffusion sheet material that pointolite sent of each light sources has three kinds of directions at least, and can open specific pointolite, to adjust the light direction of backlight module according to demand.Therefore, backlight module of the present invention can be applicable to simultaneously in the liquid crystal indicator with plurality of display modes, and can switch plurality of display modes by cooperating backlight module and the panel shows signal of switching different light directions.
2. be positioned at the backlight module of both sides compared to the known luminescence source, because the pointolite of the backlight module of present embodiment is directly to be disposed at diffusion sheet material below, so the uniformity coefficient of the area source that backlight module provided is preferred.
3. owing to do not need by increasing the uniformity coefficient that diffusion sheet material and the distance between the lamp box bottom improve area source, thus the thinner thickness of backlight module of the present invention, and the thickness of liquid crystal indicator also can so and attenuation.
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 (14)
1. backlight module comprises:
One lamp box has a relative bottom and an opening;
One diffusion sheet material is disposed at this opening part; And
A plurality of light sources, be disposed at this lamp box bottom, wherein respectively this light sources comprises a plurality of pointolites of arranging along a first direction, and at vertical this diffusion sheet material and by in the cross section of those pointolites, the directive property direction during this diffusion sheet material of the light incident that those pointolites sent has three kinds of directions at least.
2. backlight module as claimed in claim 1, wherein respectively those pointolites of this light sources comprise:
A plurality of first pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
1
A plurality of second pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
2, θ wherein
1＜θ
2And
A plurality of thirdly light sources, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
2, and the directive property direction during those these diffusion sheet materials of light incident that thirdly light source sent and those second pointolites sent this diffusion sheet material of light incident the time the directive property direction not parallel.
3. backlight module as claimed in claim 2, wherein respectively those pointolites of this light sources also comprise:
A plurality of the 4th pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
3, θ wherein
2＜θ
3And
A plurality of the 5th pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
3, and those the 5th pointolites sent this diffusion sheet material of light incident the time the directive property direction and those the 4th pointolites sent this diffusion sheet material of light incident the time the directive property direction not parallel.
4. backlight module as claimed in claim 1, wherein respectively this light sources also comprises:
A plurality of holders are arranged in this lamp box bottom along this first direction, and wherein respectively those pointolites of this light sources are to be disposed on the sidewall of those holders; And
A plurality of reflecting elements, be arranged in this lamp box bottom along this first direction, wherein respectively a reflecting surface of this reflecting element is that one of them is relative with those pointolites, and the normal vector of those reflectings surface has three kinds of directions at least, so that the directive property direction after respectively the light that those pointolites sent of this light sources is reflected by those reflecting elements has three kinds of directions at least.
5. backlight module as claimed in claim 1, wherein respectively this light sources also comprises:
A plurality of rotating mechanisms are arranged in this lamp box bottom along this first direction, and wherein respectively this rotating mechanism has a rotating shaft;
A plurality of holders, be disposed at those rotating mechanisms respectively on one of them, and respectively those pointolites of this light sources are to be disposed on the sidewall of those holders, wherein those rotating mechanisms are suitable for rotating changing folded angle between those holders and this lamp box bottom, and then the angle between making bottom those holders and this lamp box has three kinds at least; And
A plurality of reflecting elements are arranged in this lamp box bottom along this first direction, and wherein respectively this reflecting element is that one of them is relative with those pointolites, and those reflecting elements are parallel to each other.
6. liquid crystal indicator comprises:
One display panels;
One backlight module is disposed at a side of this display panels, and to provide this display panels required area source, this backlight module comprises:
One lamp box has a relative bottom and an opening;
One diffusion sheet material is disposed at this opening part; And
A plurality of light sources, be disposed at this lamp box bottom, wherein respectively this light sources comprises a plurality of pointolites of arranging along a first direction, and at vertical this diffusion sheet material and by in the cross section of those pointolites, the directive property direction during this diffusion sheet material of the light incident that those pointolites sent has three kinds of directions at least.
7. liquid crystal indicator as claimed in claim 6, wherein respectively those pointolites of this light sources comprise:
A plurality of first pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
1
A plurality of second pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
2, θ wherein
1＜θ
2And
A plurality of thirdly light sources, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
2, and the directive property direction during those these diffusion sheet materials of light incident that thirdly light source sent and those second pointolites sent this diffusion sheet material of light incident the time the directive property direction not parallel.
8. liquid crystal indicator as claimed in claim 7, wherein respectively those pointolites of this light sources also comprise:
A plurality of the 4th pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
3, θ wherein
2＜θ
3And
A plurality of the 5th pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sent and the normal of this diffusion sheet material is θ
3, and those the 5th pointolites sent this diffusion sheet material of light incident the time the directive property direction and those the 4th pointolites sent this diffusion sheet material of light incident the time the directive property direction not parallel.
9. liquid crystal indicator as claimed in claim 6, wherein respectively this light sources also comprises:
A plurality of holders are arranged in this lamp box bottom along this first direction, and wherein respectively those pointolites of this light sources are to be disposed on the sidewall of those holders; And
A plurality of reflecting elements, be arranged in this lamp box bottom along this first direction, wherein respectively a reflecting surface of this reflecting element is that one of them is relative with those pointolites, and the normal vector of those reflectings surface has three kinds of directions at least, so that the directive property direction after respectively the light that those pointolites sent of this light sources is reflected by those reflecting elements has three kinds of directions at least.
10. liquid crystal indicator as claimed in claim 6, wherein respectively this light sources also comprises:
A plurality of rotating mechanisms are arranged in this lamp box bottom along this first direction, and wherein respectively this rotating mechanism has a rotating shaft;
A plurality of holders, be disposed at those rotating mechanisms respectively on one of them, and respectively those pointolites of this light sources are to be disposed on the sidewall of those holders, wherein those rotating mechanisms are suitable for rotating changing folded angle between those holders and this lamp box bottom, and then the angle between making bottom those holders and this lamp box has three kinds at least; And
A plurality of reflecting elements are arranged in this lamp box bottom along this first direction, and wherein respectively this reflecting element is that one of them is relative with those pointolites, and those reflecting elements are parallel to each other.
11. a backlight module comprises:
One lamp box has a relative bottom and an opening;
One diffusion sheet material is disposed at this opening part;
A plurality of light sources are disposed at this lamp box bottom, and wherein respectively this light sources comprises:
A plurality of rotating mechanisms are arranged in this lamp box bottom along a first direction;
A plurality of holders are disposed at those rotating mechanisms respectively on one of them, and wherein respectively this rotating mechanism is suitable for rotating configuration this holder thereon; And
A plurality of pointolites are disposed on those holders.
12. backlight module as claimed in claim 11, wherein respectively this light sources also comprises a plurality of reflecting elements that are arranged in this lamp box bottom along this first direction, and those pointolites are to be disposed on the sidewall of those holders, and one of them is relative and those reflecting elements are respectively with those pointolites.
13. a liquid crystal indicator comprises:
One display panels;
One backlight module is disposed at a side of this display panels, and to provide this display panels required area source, this backlight module comprises:
One lamp box has a relative bottom and an opening;
One diffusion sheet material is disposed at this opening part;
A plurality of light sources are disposed at this lamp box bottom, and wherein respectively this light sources comprises:
A plurality of rotating mechanisms are arranged in this lamp box bottom along a first direction;
A plurality of holders are disposed at those rotating mechanisms respectively on one of them, wherein
Respectively this rotating mechanism is suitable for rotating configuration this holder thereon; And
A plurality of pointolites are disposed on those holders.
14. liquid crystal indicator as claimed in claim 13, wherein respectively this light sources also comprises a plurality of reflecting elements that are arranged in this lamp box bottom along this first direction, and those pointolites are to be disposed on the sidewall of those holders, and one of them is relative and those reflecting elements are respectively with those pointolites.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810091786 CN101561583B (en) | 2008-04-14 | 2008-04-14 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810091786 CN101561583B (en) | 2008-04-14 | 2008-04-14 | Backlight module and liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101561583A true CN101561583A (en) | 2009-10-21 |
| CN101561583B CN101561583B (en) | 2013-05-15 |
Family
ID=41220444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810091786 Expired - Fee Related CN101561583B (en) | 2008-04-14 | 2008-04-14 | Backlight module and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101561583B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105357508A (en) * | 2015-08-28 | 2016-02-24 | 中国人民解放军海军总医院 | Multi-view naked eye three-dimensional window examination method and system |
| CN105158978B (en) * | 2015-10-22 | 2018-06-29 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN108957853A (en) * | 2018-07-18 | 2018-12-07 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display device |
| CN112967617A (en) * | 2021-02-09 | 2021-06-15 | 维沃移动通信有限公司 | Display module and electronic device |
| CN117374059A (en) * | 2023-10-14 | 2024-01-09 | 东莞市触美电子科技有限公司 | Peep-proof display device |
-
2008
- 2008-04-14 CN CN 200810091786 patent/CN101561583B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105357508A (en) * | 2015-08-28 | 2016-02-24 | 中国人民解放军海军总医院 | Multi-view naked eye three-dimensional window examination method and system |
| CN105158978B (en) * | 2015-10-22 | 2018-06-29 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN108957853A (en) * | 2018-07-18 | 2018-12-07 | 昆山龙腾光电有限公司 | Backlight module and liquid crystal display device |
| CN112967617A (en) * | 2021-02-09 | 2021-06-15 | 维沃移动通信有限公司 | Display module and electronic device |
| CN117374059A (en) * | 2023-10-14 | 2024-01-09 | 东莞市触美电子科技有限公司 | Peep-proof display device |
| CN117374059B (en) * | 2023-10-14 | 2024-05-07 | 东莞市触美电子科技有限公司 | Peep-proof display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101561583B (en) | 2013-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100585270C (en) | Backlight unit and liquid crystal display device | |
| US8687149B2 (en) | Visual display unit illumination | |
| CN101308224B (en) | Backlight module group and its optical plate | |
| US8305515B2 (en) | Backlight unit and display device having the same using two different lights | |
| KR101646674B1 (en) | Backlight unit and display system employing the same | |
| US6554440B2 (en) | Light pipe, plane light source unit and liquid-crystal display device | |
| US20080198594A1 (en) | Optical module | |
| JP2001250412A (en) | Illumination device and liquid crystal display device provided with the same | |
| CN101561583B (en) | Backlight module and liquid crystal display device | |
| WO2014063391A1 (en) | Liquid crystal display module | |
| US7102162B2 (en) | Plane light source structure for planar display | |
| CN212675319U (en) | Light source module and double-screen display device | |
| KR102037402B1 (en) | Backlight unit and liquid crystal display device having the same | |
| CN101358711A (en) | Light supply apparatus and panel display | |
| CN100445839C (en) | Direct lighting backlight module | |
| US11402690B2 (en) | Backlight unit and liquid crystal display device including the same | |
| US9164320B2 (en) | Light emitting unit with high light spreading angle, backlight assembly having the same, and display apparatus | |
| KR100404426B1 (en) | Back light of Liquid Crystal Display | |
| TW201044071A (en) | Back light module and optical device using the same | |
| US11156869B1 (en) | Backlight structure and display panel | |
| JP2017151260A (en) | Display | |
| JP2000258749A (en) | Surface light source device and liquid crystal display device | |
| CN115016177B (en) | Display device and backlight module | |
| US20230400622A1 (en) | Waveguide manufacturing methods | |
| JP2018120090A (en) | Display and electronic inventory tag |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20180414 |