CN101561583B - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN101561583B CN101561583B CN 200810091786 CN200810091786A CN101561583B CN 101561583 B CN101561583 B CN 101561583B CN 200810091786 CN200810091786 CN 200810091786 CN 200810091786 A CN200810091786 A CN 200810091786A CN 101561583 B CN101561583 B CN 101561583B
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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
Liquid crystal display 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 transmission-type or the liquid crystal display of half-transmission half-reflection type, mainly be 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 is the area source that provides this liquid crystal panel required, so that liquid crystal display reaches the effect of demonstration.
Along with the progress of display technique, have at present the liquid crystal display that can demonstrate stereoscopic picture plane.The liquid crystal display of this type is mainly to demonstrate respectively different pictures for user's left eye from right eye, to allow picture that user's left eye and right eye seen as a pair of picture that parallax is arranged.For the demand in response to this kind display technique, the backlight module of the liquid crystal display of this type need be designed to two light directions, switches light direction with the picture that demonstrates according to liquid crystal display.
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 respectively the opening of light-emitting diode (LED) module 110a, 110b, and be positioned on reflector plate 130.140 of prismatic lenses are relative with reflector plate 130.
Hold above-mentioned, the picture that demonstrates when liquid crystal display is during for user's left eye, light-emitting diode (LED) module 110a can be luminous, light-emitting diode (LED) module 110b is not luminous, so the light that sends of light-emitting diode (LED) module 110a by the light direction after prismatic lens 140 namely towards user's left eye.Otherwise, the picture that demonstrates when liquid crystal display is during for user's right eye, light-emitting diode (LED) module 110b can be luminous, and light-emitting diode (LED) module 110a is not luminous, so the light that sends of light-emitting diode (LED) module 110b by the light direction after prismatic lens 140 namely 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 provides.For instance, when light-emitting diode (LED) module 110a is luminous, the phenomenon that reduces for compensating light intensity is 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 comparatively average to the light intensity of right side outgoing from prismatic lens 140 left sides.But, in the case, when light-emitting diode (LED) module 110b is luminous, due to reflector plate 130 apart from the light-emitting diode (LED) module 110b near part that heals, its reflectivity is higher, thus the light intensity from prismatic lens 140 right sides to the left side outgoing will be more and more a little less than.Therefore, the uniformity coefficient of the area source that provides of known backlight module 100 is relatively poor.In addition, although increase the uniformity coefficient that the distance of being separated by between prismatic lens 140 and reflector plate 130 can be improved area source, can increase the thickness of backlight module 100.
In addition, the liquid crystal display that has respectively at present plurality of display modes (as normal displaying mode, stereo display pattern, narrow visual angle display mode and two picture disply patterns etc.).But the light direction of known backlight module 100 only has two kinds, thus be only applicable to can demonstrate in the liquid crystal display of stereoscopic picture plane, and can't be applicable to simultaneously have in the liquid crystal display of 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 is to provide 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 source group.Wherein, lamp box has a relative bottom and an opening, and the diffusion sheet material is to be disposed at opening part, and the light source group is to be disposed at bottom lamp box.In addition, each light source group 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 send has three kinds of directions at least.
In one embodiment of this invention, the pointolite of above-mentioned each light source group comprises a plurality of the first pointolites, a plurality of second point light source and a plurality of thirdly light source.Wherein, the first pointolite send light incident diffusion sheet material the time the directive property direction and the angle between the normal of diffusion sheet material be θ
1The second point light source and thirdly light source send light incident diffusion sheet material the time the directive property direction and the angle between the normal of diffusion sheet material be θ
2, and θ
1＜θ
2In addition, thirdly light source send light incident diffusion sheet material the time the directive property direction and the second point light source send 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 source group is according to the order repeated arrangement of light source, the first pointolite and second point light source thirdly.And the directive property direction during light incident diffusion sheet material that thirdly light source, the first pointolite and the second point light source of sequentially arranging sends is to be divergent shape.
In one embodiment of this invention, in above-mentioned each light source group, first pointolite of arranging along first direction be the first pointolite, second point light source with light source thirdly one of them.
In one embodiment of this invention, the first above-mentioned pointolite, second point light source are identical with the lighting angle of light source thirdly.
In one embodiment of this invention, the first above-mentioned pointolite, second point light source 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 source group also comprises a plurality of the 4th pointolites and a plurality of the 5th pointolite.Wherein, the 4th pointolite and the 5th pointolite send 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 send light incident diffusion sheet material the time the directive property direction and the 4th pointolite send 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 source group is according to the 5th pointolite, the order repeated arrangement of light source, the first pointolite, second point light source and the 4th pointolite thirdly.In addition, the 5th pointolite of sequentially arranging, thirdly light source, the first pointolite, second point light source and the 4th pointolite send 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 source group, first pointolite of arranging along first direction be the first pointolite, second point light source, 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 point light source 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 the first pointolite is less than the lighting angle of the 4th pointolite.
In one embodiment of this invention, the first above-mentioned pointolite, second point light source 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 source group 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 the pointolite of each light source group sends has three kinds of directions at least.
In one embodiment of this invention, above-mentioned each light source group also comprises a plurality of holders and a plurality of reflecting element.Wherein, holder is to be arranged in lamp box bottom along first direction, and the pointolite of each light source group 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, so that the directive property direction that the light that the pointolite of each light source group sends is reflected after 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 source group 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 lamp box bottom along first direction.In addition, holder is disposed at respectively these rotating mechanisms on one of them, and the pointolite of each light source group is to be disposed on the sidewall of these holders.Rotating mechanism is suitable for rotating changing angle folded between holder and lamp box bottom, and then makes the angle of holder between bottom lamp box 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 of controlling 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 again a kind of backlight module, and it comprises a lamp box, a diffusion sheet material and a plurality of light source group.Wherein, lamp box has a relative bottom and an opening, and the diffusion sheet material is to be disposed at opening part, and the light source group is to be disposed at bottom lamp box.In addition, each light source group 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 respectively these rotating mechanisms 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 source group 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 of controlling 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 the second 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, the directive property direction during the light incident diffusion sheet material that sends due to the pointolite of each light source group has three kinds of directions at least, therefore can open specific pointolite according to the display mode of liquid crystal indicator, to adjust the light direction of backlight module.
For above and other purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate 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 source group.
Fig. 3 B is the diagrammatic cross-section along the being seen backlight module of I-I ' line in Fig. 3 A.
Fig. 3 C is the schematic diagram of the lighting angle of the first pointolite to the five pointolites.
Fig. 4 is the diagrammatic cross-section of each light source group in 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 in 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: first substrate
214: second substrate
216: liquid crystal layer
310: lamp box
312: the bottom
314: opening
320: the diffusion sheet material
330,330a, 330c: light source group
332: pointolite
332a: the first pointolite
332b: second point light source
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 source group, and Fig. 3 B is the diagrammatic cross-section along the being seen backlight module of I-I ' line in Fig. 3 A.Please refer to Fig. 2 Fig. 3 A and Fig. 3 B, the liquid crystal indicator 200 of the 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 a first substrate 212, a 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 source group 330.Lamp box 310 has a relative bottom 312 and an opening 314, and diffusion sheet material 320 is for example diffusing panel or diffusion disk, be to be disposed at opening 314 places, and light source group 330 is to be disposed at lamp box bottom 312.In addition, each light source group 330 comprises a plurality of pointolites 332 of arranging along a first direction D1, and these pointolites 332 are for example light emitting diode or other applicable pointolites.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, the direction parallel with two of users' 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 send has three kinds of directions at least.
In the first embodiment, the pointolite 332 of above-mentioned each light source group 330 comprises a plurality of the first pointolite 332a, a plurality of second point light source 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 send 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
1Be for example 0 degree, therefore do not indicate in Fig. 3).Second point light source 332b and thirdly light source 332c send 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 send and the normal of diffusion sheet material 320 is θ
3, and θ
1＜θ
2＜θ
3In addition, thirdly light source 332c send light incident diffusion sheet material 320 time directive property direction 333c and second point light source 332b send 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 the directive property direction 333e during light incident diffusion sheet material 320 that the 5th pointolite 332e sends and the 4th pointolite 332d send is not parallel.
Hold above-mentionedly, the arrangement mode of the pointolite 332 of each light source group 330 is for example according to the 5th pointolite 332e, the order repeated arrangement of light source 332c, the first pointolite 332a, second point light source 332b and the 4th pointolite 332d thirdly.In addition, the 5th pointolite 332e that sequentially arranges, thirdly light source 332c, the first pointolite 332a, second point light source 332b and the 4th pointolite 332d send light incident diffusion sheet material 320 time directive property direction 333e, 333c, 333a, 333b, 333d be divergent shape.
Above-mentioned θ
2Be for example 7 degree, and θ
3Be for example 25 degree, but not as limit.In addition, please refer to Fig. 3 C, it is the schematic diagram of the lighting angle of the first pointolite to the five pointolites.The first pointolite 332a, second point light source 332b are for example all φ 1 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 is all for example φ 2, and φ 1 is less than φ 2.In one embodiment, φ 1 is less than or equal to 15 degree, and φ 2 is less than or equal to 60 degree.
In the present invention, each light source group 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 source group 330 sends has three kinds of directions at least.Incident angle and incident direction when the slope of each loading end 335 that in other words, in the present invention can be by pedestal 334 decides the directive property direction 333 incident diffusion sheet material 320 of the light that pointolite 332 sends.Therefore, in the 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 sends is parallel with the normal vector 336 of the loading end 335 at its place.It is worth mentioning 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, second point light source 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, open simultaneously the first pointolite 322a, second point light source 322b, thirdly light source 322c, the 4th pointolite 322d and the 5th pointolite 322e.When the display mode of liquid crystal indicator 200 is the stereo display pattern, alternately open second point light source 322b and light source 322c thirdly, particularly, the 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 point light source 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, open simultaneously the first pointolite 322a, second point light source 322b and light source 322c thirdly.When the display mode of liquid crystal indicator 200 is two picture disply pattern, 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 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 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 the 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 provides of the backlight module 300 of the present embodiment is preferred.Thus, do not need to increase again the uniformity coefficient that distance between diffusion sheet material 320 and lamp box bottom 312 improves area source, so the thickness of the backlight module 300 of the present embodiment can reduce.
It is worth mentioning that, in each light source group 330 of the present embodiment, first pointolite 332 of arranging along first direction D1 is not defined as the 5th pointolite 332e.That is, in each light source group 330, first pointolite 332 of arranging along first direction D1 can be the first pointolite 332a, second point light source 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 source group in 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 source group 330, first pointolite 332 of arranging along first direction D1 can be not identical.In other words, in order further to improve the uniformity coefficient of area source, can make Fig. 3 A top side to the light source group 330 of lower side, first pointolite 332 of arranging along first direction D1 is sequentially the 5th pointolite 332e, thirdly light source 332c, the first pointolite 332a, second point light source 332b and the 4th pointolite 332d, namely as shown in the light source group 330 of Fig. 4 the top to below.
Should be noted, although in the first embodiment, directive property direction 333 during light incident diffusion sheet material 320 that pointolite 332 sends has five kinds of directions, but the present invention only qualified point light source 332 send light incident diffusion sheet material 320 time directive property direction 333 have three kinds of directions at least.Those skilled in the art after reference the 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 sends 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, the pointolite 332 of its backlight module of arranging in pairs or groups send light incident diffusion sheet material 320 time directive property direction 333 only need three kinds (directive property direction 333a, 333b, 333c).Therefore, backlight module only need have the first pointolite 332a, second point light source 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 sends 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 source group 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 is for example vertical with lamp box bottom 312.The pointolite 332 of each light source group 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, so that the directive property direction 333 that the light that the pointolite 332 of each light source group 330a sends is reflected after element 337 reflects has three kinds of directions at least.
Particularly, angle between directive property direction 333a when the light incident diffusion sheet material 320 of wanting to make the first pointolite 332a to send and the normal of diffusion sheet material 320 is 0 when spending, the angle theta between the reflecting element 337a relative with the first pointolite 332a and lamp box bottom 312
4Be required to be 45 degree; When want to make second point light source 332b and thirdly light source 332c send 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 the reflecting element 337b relative with second point light source 332b and lamp box bottom 312
5Be required to be 41.5, and and the angle theta between the reflecting element 337c that thirdly light source 332c is relative and lamp box bottom 312
6Be required to be 48.5 degree; Angle between directive property direction 333d, 333e when the light incident diffusion sheet material 320 of wanting to make the 4th pointolite 332d and the 5th pointolite 332e to send and the normal of diffusion sheet material 320 is 25 when spending, the angle theta between the reflecting element 337d relative with the 4th pointolite 332d and lamp box bottom 312
7Be required to be 32.5 degree, and the angle theta between 312 bottom the reflecting element 337e relative with the 5th pointolite 332e and lamp box
8Be required to be 57.5 degree.
Should be noted, 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 relative two side.Certainly, angle bottom the reflecting element 337 relative with each pointolite 332 and lamp box between 312 need be looked demand and adjust, those skilled in the art is with reference to pushing away voluntarily to get each reflecting element 337 angle between 312 bottom lamp box after explanation above, therefore will no longer describe in detail at this.
The 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 in 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 the present embodiment and the first embodiment only is backlight module, therefore following will be only describing for the backlight module 300c of the liquid crystal indicator 200a of the present embodiment.In addition, in the first embodiment and the second embodiment, identical element will represent with identical label, and hereinafter will omit the detailed description for similar elements.
The backlight module 300c of the present embodiment comprises a lamp box 310, a diffusion sheet material 320 and a plurality of light source group 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 source group 330c is disposed at lamp box bottom 312.In addition, each light source group 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 respectively these rotating mechanisms 340 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 source group 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 rotations of controlling bearing 342.
Each above-mentioned reflecting element 337 angle between 312 bottom lamp box is all for example identical, and each servomechanism 344 can be controlled the angle that corresponding bearing 342 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 sends and the normal of diffusion sheet material 320.Therefore, in the present embodiment, the directive property direction in the time of can making by the rotation of controlling bearing 342 the light incident diffusion sheet material 320 that each pointolite 332 sends has at least more than three kinds.In other words, can make backlight module 300c have identical light direction with the backlight module 300 shown in Fig. 3 by the rotation of controlling bearing 342.
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 the 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 relative two side.
In sum, backlight module of the present invention and liquid crystal indicator have following advantages at least:
1. the directive property direction during the light incident diffusion sheet material that sends due to the pointolite of each light source group has three kinds of directions at least, and can open specific pointolite according to demand, to adjust the light direction of backlight module.Therefore, backlight module of the present invention can be applicable to have in the liquid crystal indicator of plurality of display modes simultaneously, and can switch plurality of display modes by backlight module and the Display panel signal that different light directions are switched in cooperation.
2. be positioned at the backlight module of both sides compared to the known luminescence source, because the pointolite of the backlight module of the present embodiment is directly to be disposed at diffusion sheet material below, so the uniformity coefficient of the area source that provides of backlight module is preferred.
3. due to the uniformity coefficient that does not need to improve by increasing diffusion sheet material and the distance between the lamp box bottom 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.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when can do 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 (8)
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 source groups, be disposed at bottom this lamp box, wherein respectively this light source group 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, directive property direction during this diffusion sheet material of the light incident that those pointolites send has three kinds of directions at least
Wherein respectively those pointolites of this light source group comprise:
A plurality of the first pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sends and the normal of this diffusion sheet material is θ
1
A plurality of second point light sources, the angle between the directive property direction during this diffusion sheet material of the light incident that it sends 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 sends and the normal of this diffusion sheet material is θ
2, and those thirdly light source send this diffusion sheet material of light incident the time the directive property direction and those second point light sources send this diffusion sheet material of light incident the time the directive property direction not parallel.
2. backlight module as claimed in claim 1, wherein respectively those pointolites of this light source group 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 sends 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 sends and the normal of this diffusion sheet material is θ
3, and those the 5th pointolites send this diffusion sheet material of light incident the time the directive property direction and those the 4th pointolites send this diffusion sheet material of light incident the time the directive property direction not parallel.
3. backlight module as claimed in claim 1, wherein respectively this light source group 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 source group 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 respectively the directive property direction of the light that sends of those pointolites of this light source group after by those reflecting elements reflections has three kinds of directions at least.
4. backlight module as claimed in claim 1, wherein respectively this light source group 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 respectively those rotating mechanisms on one of them, and respectively those pointolites of this light source group are to be disposed on the sidewall of those holders, wherein those rotating mechanisms are suitable for rotating changing angle folded between those holders and this lamp box bottom, and then make the angle of those holders between bottom this lamp box have 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.
5. 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 source groups, be disposed at bottom this lamp box, wherein respectively this light source group 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, directive property direction during this diffusion sheet material of the light incident that those pointolites send has three kinds of directions at least
Wherein respectively those pointolites of this light source group comprise:
A plurality of the first pointolites, the angle between the directive property direction during this diffusion sheet material of the light incident that it sends and the normal of this diffusion sheet material is θ
1
A plurality of second point light sources, the angle between the directive property direction during this diffusion sheet material of the light incident that it sends 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 sends and the normal of this diffusion sheet material is θ
2, and those thirdly light source send this diffusion sheet material of light incident the time the directive property direction and those second point light sources send this diffusion sheet material of light incident the time the directive property direction not parallel.
6. liquid crystal indicator as claimed in claim 5, wherein respectively those pointolites of this light source group 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 sends 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 sends and the normal of this diffusion sheet material is θ
3, and those the 5th pointolites send this diffusion sheet material of light incident the time the directive property direction and those the 4th pointolites send this diffusion sheet material of light incident the time the directive property direction not parallel.
7. liquid crystal indicator as claimed in claim 5, wherein respectively this light source group 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 source group 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 respectively the directive property direction of the light that sends of those pointolites of this light source group after by those reflecting elements reflections has three kinds of directions at least.
8. liquid crystal indicator as claimed in claim 5, wherein respectively this light source group 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 respectively those rotating mechanisms on one of them, and respectively those pointolites of this light source group are to be disposed on the sidewall of those holders, wherein those rotating mechanisms are suitable for rotating changing angle folded between those holders and this lamp box bottom, and then make the angle of those holders between bottom this lamp box have 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.
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 CN101561583A (en) | 2009-10-21 |
| CN101561583B true CN101561583B (en) | 2013-05-15 |
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ID=41220444
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| 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 |
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| CN (1) | CN101561583B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105357508B (en) * | 2015-08-28 | 2017-06-13 | 中国人民解放军海军总医院 | Multiple views bore hole solid form inspection 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 |
| CN108957853B (en) * | 2018-07-18 | 2021-04-27 | 昆山龙腾光电股份有限公司 | 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 |
| 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 |
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|---|---|
| CN101561583A (en) | 2009-10-21 |
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