CN114518671A - Light splitting plate and backlight module with same - Google Patents
Light splitting plate and backlight module with same Download PDFInfo
- Publication number
- CN114518671A CN114518671A CN202210178182.6A CN202210178182A CN114518671A CN 114518671 A CN114518671 A CN 114518671A CN 202210178182 A CN202210178182 A CN 202210178182A CN 114518671 A CN114518671 A CN 114518671A
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- light splitting
- plate
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- blocks
- beam splitter
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- 230000001154 acute effect Effects 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 15
- 238000000889 atomisation Methods 0.000 abstract description 5
- 239000011324 bead Substances 0.000 description 8
- 238000005286 illumination Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 210000001624 hip Anatomy 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
Abstract
The utility model belongs to the technical field of light-directing device and specifically relates to a beam splitter and have backlight unit of this beam splitter is related to, and the beam splitter includes bottom plate and polylith beam splitter, and polylith beam splitter all sets up on the bottom plate, and the profile of beam splitter towards the one side of bottom plate is the bottom surface profile, and the beam splitter is non-regular triangular pyramid, and the bottom surface profile is non-regular triangle. Backlight unit includes beam-splitting board and lamp plate, and the beam-splitting board setting has one side of light source at the lamp plate, and the beam-splitting board setting is in the irradiation range of lamp plate, and the beam-splitting board stacks there are two at least. The diffusion plate can be overcome in this application and the farther away with the light source distance, the better problem of atomization effect reduces backlight unit's thickness.
Description
Technical Field
The application relates to the field of light guide devices, in particular to a light splitting plate and a backlight module with the same.
Background
The backlight module is one of the key components of the lcd panel, and has the function of supplying sufficient light sources with uniform brightness and distribution, so that the lcd panel can normally display images.
Traditional straight following formula backlight unit of LED all is with single LED lamp pearl according to interval setting, and there is the oval-shaped condition in the illumination scope of LED lamp pearl, leads to appearing the dark space easily between the LED lamp pearl. In a conventional method, a plurality of optical elements or optical films are used to disperse a light source, or the distance between an optical plate or film and an LED lamp is increased, so that the light of the LED lamp obtains a better light mixing space and a uniform backlight picture is achieved. The most commonly used optical plate at present is a diffusion plate, and the diffusion plate is used for homogenizing all point light sources after optically atomizing light of a single LED lamp, so that the point light sources are converted into surface light sources.
However, the diffusion plate has an obvious disadvantage in the using process, namely, in the process of atomizing the light source, a certain distance needs to be kept between the diffusion plate and the light source, and the farther the distance is, the better the atomization effect is, so that the thickness of the LED backlight module is larger.
Disclosure of Invention
In order to overcome the diffusion plate and the farther away of light source distance, the better problem of atomization effect reduces backlight unit's thickness, this application provides a beam splitter board and has this beam splitter's backlight unit.
On the one hand, the application provides a light splitting plate, adopts following technical scheme:
the light splitting plate comprises a bottom plate and a plurality of light splitting blocks, wherein the light splitting blocks are arranged on the bottom plate and are triangular-cone-shaped.
Through adopting above-mentioned technical scheme, when light worn out from the beam splitting piece, take place the refraction, deflect to bigger angle, and then enlarge the irradiation range of light, reduce and eliminate the dark space between the lamp pearl.
In a specific possible implementation, the profile of the side of the light splitting block facing the bottom plate is a bottom surface profile, and the bottom surface profile is a non-regular triangle.
Through adopting above-mentioned technical scheme, change the appearance of beam splitting piece, lead from the light that jets out in the beam splitting piece, conveniently guide light and make light collect, promote the luminous luminance of beam splitting board.
In a particular embodiment, the base profile is an isosceles triangle, parallel to the base of the base profile is the Y-direction, and parallel to the median line at the base of the base profile is the X-direction.
Through adopting above-mentioned technical scheme, the face appearance that beam splitting piece and bottom surface profile's waist are connected is the same, conveniently leads the light of wearing out from the beam splitting piece, conveniently guides light and eliminates the dark space.
In a specific possible embodiment, the bottom profile is an obtuse isosceles triangle or a right isosceles triangle; the light splitting blocks are arranged in a staggered mode along the X direction, and the vertex angles of the bottom surface profiles of the adjacent light splitting blocks arranged along the Y direction are opposite in direction.
By adopting the technical scheme, the obtuse angle isosceles triangle and the right angle isosceles triangle have larger action areas, and the diffusion effect on light rays is improved.
In a particular embodiment, the bottom surface profile is an acute isosceles triangle; the vertex angles of the bottom surface contours of adjacent light splitting blocks arranged along the X direction are opposite in direction, and the light splitting blocks are arranged in a staggered mode along the Y direction.
Through adopting above-mentioned technical scheme, make things convenient for the beam split piece closely to arrange on the bottom plate for can hold more beam split pieces on the bottom plate, promote the diffusion effect to light.
In a particular possible embodiment, the bottom surface profile is an acute isosceles triangle; the light splitting blocks are arranged in a staggered mode along the X direction and arranged linearly along the Y direction.
Through adopting above-mentioned technical scheme, make things convenient for the beam split piece closely to arrange on the bottom plate for can hold more beam split pieces on the bottom plate, promote the diffusion effect to light.
In a specific possible embodiment, the bottom surface profile is a non-isosceles right triangle, parallel to the longer leg of the bottom surface profile is the M direction, parallel to the other leg of the bottom surface profile is the N direction; the light splitting blocks are arranged in a staggered mode along the M direction and in a staggered mode along the N direction.
Through adopting above-mentioned technical scheme, be the rectangle after the bottom surface profile concatenation of adjacent beam split piece, make things convenient for the beam split piece to cover the surface of bottom plate, reduce the condition that partial beam split piece appears in the bottom plate surface, promote the diffusion effect of beam splitter to light.
In a specific possible embodiment, the thickness of the bottom plate is L, the distance from the tip end of the light splitting block to the bottom plate is L, and L is more than or equal to 0.2mm and less than or equal to 2L/3.
By adopting the technical scheme, the size of the light splitting block is controlled, the size of the light splitting block can be conveniently adjusted under the condition that the rigidity of the light splitting plate is not influenced, and the production cost is saved.
On the other hand, this application still provides a backlight unit, adopts following technical scheme:
the utility model provides a backlight module, includes foretell beam splitter board, still includes the lamp plate, the beam splitter board sets up the lamp plate has one side of light source, the beam splitter board sets up in the irradiation range of lamp plate, the beam splitter board is stacked there are two at least.
Through adopting above-mentioned technical scheme, the light that the polylith beam splitter sent the lamp plate diffuses, makes the pointolite atomizing of lamp plate become the area source, replaces original diffuser plate, reduces backlight unit's thickness.
In a specific embodiment, the orientation of the light splitting blocks on adjacent light splitting plates has an included angle c, 0 ° < c <180 °.
Through adopting above-mentioned technical scheme, through the orientation of adjustment beam split piece, guide the light of diffusion, make light to the direction diffusion of difference, reduce and eliminate the dark space, promote the atomization effect to light source light, replace the diffuser plate completely.
In summary, the present application includes at least one of the following beneficial technical effects:
1. a plurality of light splitting plates are used for replacing a diffusion plate to diffuse the point light source on the lamp panel into a surface light source, so that the thickness of the backlight module is reduced;
2. set the beam split piece on bottom plate surface to the triangular pyramid of different shapes, conveniently atomize the light source of lamp plate according to the in service behavior of difference, promote the atomization effect to the light source.
Drawings
Fig. 1 is a schematic diagram showing the structure of the lamp panel and the illumination range of the lamp beads.
Fig. 2 is a schematic diagram showing a lamp bead illumination range after diffusion.
Fig. 3 is a schematic view showing the structure of the light-splitting plate in example 1.
Fig. 4 is a schematic diagram showing the relationship between the dimensions of the light splitting block and the bottom plate.
Fig. 5 is a schematic view showing the structure of the light distribution plate in example 2.
Fig. 6 is a schematic view showing the structure of the light distribution plate in example 3.
Fig. 7 is a schematic view showing the structure of the light distribution plate in example 4.
FIG. 8 is a schematic view showing a structure of a backlight module.
FIG. 9 is a schematic view showing the orientation angle of the light-splitting blocks on the adjacent light-splitting plates.
Description of reference numerals: 1. a base plate; 2. a light splitting block; 3. a bottom surface profile; 4. a lamp panel; 41. mounting a plate; 42. a lamp bead; 10. a light splitting plate.
Detailed Description
The present application is described in further detail below with reference to figures 1-9.
Referring to fig. 1 and 2, a lamp panel 4 includes mounting panel 41 and a plurality of lamp beads 42, and a plurality of lamp beads 42 rectangular array arranges on mounting panel 41, and lamp bead 42's irradiation range is oval in the projection on mounting panel 41, has major axis and minor axis. The gap between the illumination ranges is the dark region.
Example 1:
referring to fig. 3, the spectroscopic plate 10 includes a bottom plate 1 and a plurality of spectroscopic blocks 2, the plurality of spectroscopic blocks 2 are integrally formed on the bottom plate 1, and the spectroscopic blocks 2 are triangular pyramidal.
During the use, the one side that is equipped with beam splitting block 2 with bottom plate 1 deviates from lamp plate 4, and the light that lamp pearl 42 sent on the mounting panel 41 passes through in bottom plate 1 gets into beam splitting block 2 to outwards disperse from beam splitting block 2. Light-splitting piece 2 can take place the deflection when making the light that absorbs wear out from light-splitting piece 2 through the lateral wall of its slope, realizes diffusing light, promotes the irradiation range of light.
Referring to fig. 3, the profile of one surface of the light splitting block 2 facing the bottom plate 1 is a bottom surface profile 3, the bottom surface profile 3 is an acute isosceles triangle, the direction parallel to the bottom side of the bottom surface profile 3 is the Y direction, and the direction parallel to the center line on the bottom side of the bottom surface profile 3 is the X direction, in this embodiment, the X direction is parallel to the width direction of the bottom plate 1, and the Y direction is parallel to the length direction of the bottom plate 1. The vertex angles of the bottom surface outlines 3 of the adjacent light splitting blocks 2 arranged along the X direction are opposite, the light splitting blocks 2 are arranged in a staggered mode in the Y direction, and the waists of the bottom surface outlines 3 of the adjacent light splitting blocks 2 are overlapped. The light splitting blocks 2 can be closely arranged on the bottom plate 1 as much as possible due to the arrangement, the light splitting blocks 2 are arranged on the bottom plate 1 as much as possible, and the light collecting effect and the light diffusing effect of the light splitting plate 10 on light are improved.
Referring to FIG. 4, the thickness of the bottom plate 1 is L, the distance from the tip of the light splitting block 2, which is not connected with the bottom plate 1, to the bottom plate 1 is L, and L is greater than or equal to 0.2mm and less than or equal to 2L/3. For example, the thickness of the bottom plate 1 is 1mm, the distance from the tip of the light splitting block 2 to the surface of the light splitting block 2 facing the bottom plate 1 is 0.2mm-0.66 mm. Because the light-splitting plate 10 is formed in an injection molding mode, the use of materials is reduced and the production cost is saved under the condition that the rigidity of the light-splitting plate 10 is not influenced by the limitation on the size of the light-splitting block 2.
Example 2:
referring to fig. 5, embodiment 2 is different from embodiment 1 in that the light-splitting blocks 2 are arranged alternately in the X direction and linearly in the Y direction. The mode of arranging of beam splitting piece 2 has decided light and has worn out the back from beam splitting piece 2, and the direction of dispersing of light is through changing the mode of arranging of beam splitting piece 2 on bottom plate 1, and the direction of dispersing of adjustment light conveniently adapts to different lamp plates 4.
Example 3:
referring to fig. 6, embodiment 3 differs from embodiment 1 in that: the bottom surface profile 3 of the light splitting block 2 is an obtuse isosceles triangle or an isosceles right triangle. The following description is made with reference to isosceles obtuse triangles.
Referring to fig. 6, the light splitting blocks 2 are arranged in a staggered manner along the X direction, the waists of the bottom surface profiles 3 of the adjacent light splitting blocks 2 are overlapped, the light splitting blocks 2 are arranged linearly along the Y direction, the vertex angles of the bottom surface profiles 3 of the adjacent light splitting blocks 2 are opposite in direction, and the bottom lines of the bottom surface profiles 3 of the two adjacent light splitting blocks 2 are overlapped, so that the adjacent bottom surface profiles 3 are spliced into a diamond shape.
Under the same specification, the light splitting block 2 with the bottom surface outline 3 being the obtuse isosceles triangle can be regarded as the combination of the acute isosceles triangle light splitting blocks 2 with the two bottom surface outlines 3, but the light splitting block 2 with the bottom surface outline 3 being the obtuse isosceles triangle has a larger action area, can more efficiently disperse light, and has a better dispersing effect. The dark space between the lamp beads 42 is eliminated better.
Example 4:
referring to fig. 7, embodiment 4 differs from embodiment 1 in that: the bottom surface outline 3 of the light splitting block 2 is a non-isosceles right triangle, the direction parallel to the longer right-angle side of the bottom surface outline 3 is the M direction, and the direction parallel to the other right-angle side of the bottom surface outline 3 is the N direction. The light splitting blocks 2 are arranged in a staggered mode along the M direction and in a staggered mode along the N direction, the bottom surface outlines 3 of the adjacent light splitting blocks 2 are spliced into rectangles, and the long sides or the short sides of the adjacent rectangles coincide.
Because the light splitting block 2 splices the back each other, the whole rectangle that is of bottom surface profile 3 more conveniently spreads light splitting block 2 over monoblock bottom plate 1, reduces the condition that only partial light splitting block 2 appears in bottom plate 1 edge, enlarges the active area of beam splitter 10 and to the diffusion effect of light.
Referring to fig. 8 and fig. 9, the embodiment of the present application further discloses a backlight module, including lamp plate 4 and the above-mentioned arbitrary light splitting plate 10, light splitting plate 10 sets up in the top of lamp plate 4, and light splitting plate 10 deviates from lamp plate 4 in the irradiation range of lamp plate 4, and light splitting plate 10 has the one side of light splitting block 2. The light splitting plates 10 are arranged in two, and the two light splitting plates 10 are overlapped up and down. The angle between the light splitting blocks 2 on the two base plates 1 is c, 0 ° < c <180 °, in this embodiment, c =90 °. By changing the orientation of the light splitting block 2 on the light splitting plate 10, light rays are diffused towards different directions, and dark areas among the lamp beads 42 are eliminated.
Because the influence of the interval between beam splitter 10 and lamp pearl 42 to the diffusion effect of the light of beam splitter 10 is less, through the mode of two beam splitter 10 replacing the diffuser plate, can reduce the interval between beam splitter 10 and lamp plate 4 as far as possible, and then reduce the holistic thickness of backlight unit.
The implementation principle of the embodiment of the application is as follows: the diffusion plate is replaced by the light splitting plates 10 with smaller requirements for the distance between the light splitting plates and the light source, the light emitted by the lamp panel 4 is diffused through the at least two light splitting plates 10, the point light source on the lamp panel 4 is atomized into the surface light source, and the thickness of the backlight module is effectively reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A light splitting panel, characterized in that: the light splitting device comprises a bottom plate (1) and a plurality of light splitting blocks (2), wherein the light splitting blocks (2) are arranged on the bottom plate (1), and the light splitting blocks (2) are triangular pyramid-shaped.
2. A spectroscopic plate as set forth in claim 1 wherein: the profile of one surface, facing the bottom plate (1), of the light splitting block (2) is a bottom surface profile (3), and the bottom surface profile (3) is a non-regular triangle.
3. A spectroscopic plate as set forth in claim 1, wherein: the bottom surface contour (3) is an isosceles triangle, the bottom side parallel to the bottom side of the bottom surface contour (3) is in the Y direction, and the middle line on the bottom side of the bottom surface contour (3) is in the X direction.
4. A spectroscopic plate as set forth in claim 3, wherein: the bottom surface contour (3) is an obtuse angle isosceles triangle or a right angle isosceles triangle; the light splitting blocks (2) are arranged in a staggered mode along the X direction, and the vertex angles of the bottom surface outlines (3) of the adjacent light splitting blocks (2) arranged along the Y direction are opposite in direction.
5. A spectroscopic plate as set forth in claim 3 wherein: the bottom surface contour (3) is an acute isosceles triangle; the vertex angles of the bottom surface contours (3) of adjacent light splitting blocks (2) arranged along the X direction are opposite, and the light splitting blocks (2) are arranged in a staggered mode along the Y direction.
6. A spectroscopic plate as set forth in claim 3 wherein: the bottom surface contour (3) is an acute isosceles triangle; the light splitting blocks (2) are arranged in a staggered mode along the X direction and in a linear mode along the Y direction.
7. A spectroscopic plate as set forth in claim 1 wherein: the bottom surface contour (3) is a non-isosceles right triangle, the direction parallel to the longer right-angle side of the bottom surface contour (3) is the M direction, and the direction parallel to the other right-angle side of the bottom surface contour (3) is the N direction; the light splitting blocks (2) are arranged in a staggered mode along the M direction and in a staggered mode along the N direction.
8. A spectroscopic plate as set forth in claim 1 wherein: the thickness of the bottom plate (1) is L, the distance from the tip of the light splitting block (2) to the bottom plate (1) is L, and L is more than or equal to 0.2mm and less than or equal to 2L/3.
9. A backlight module is characterized in that: the light splitting plate comprises the light splitting plate of any one of claims 1 to 8, and further comprises a lamp panel (4), wherein the light splitting plate is arranged on one side, provided with a light source, of the lamp panel (4), the light splitting plate is arranged in an irradiation range of the lamp panel (4), and at least two light splitting plates are stacked.
10. A backlight module according to claim 9, wherein: the orientation of the light splitting blocks (2) on the adjacent light splitting plates has an included angle c, and 0 degrees < c <180 degrees.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178182.6A CN114518671A (en) | 2022-02-24 | 2022-02-24 | Light splitting plate and backlight module with same |
| PCT/CN2022/097736 WO2023159802A1 (en) | 2022-02-24 | 2022-06-08 | Beam splitting plate and backlight module having beam splitting plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178182.6A CN114518671A (en) | 2022-02-24 | 2022-02-24 | Light splitting plate and backlight module with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114518671A true CN114518671A (en) | 2022-05-20 |
Family
ID=81598197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210178182.6A Pending CN114518671A (en) | 2022-02-24 | 2022-02-24 | Light splitting plate and backlight module with same |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114518671A (en) |
| WO (1) | WO2023159802A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023159802A1 (en) * | 2022-02-24 | 2023-08-31 | 富盛光电（吴江）有限公司 | Beam splitting plate and backlight module having beam splitting plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114488618B (en) * | 2022-02-24 | 2023-03-21 | 富盛光电（吴江）有限公司 | Light splitting plate combined structure |
| CN114518671A (en) * | 2022-02-24 | 2022-05-20 | 富盛光电（吴江）有限公司 | Light splitting plate and backlight module with same |
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2022
- 2022-02-24 CN CN202210178182.6A patent/CN114518671A/en active Pending
- 2022-06-08 WO PCT/CN2022/097736 patent/WO2023159802A1/en unknown
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| TW201437723A (en) * | 2013-03-21 | 2014-10-01 | Chi Lin Optoelectronics Co Ltd | Display apparatus and direct type backlight module and diffusion plate thereof |
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| CN215895850U (en) * | 2021-08-02 | 2022-02-22 | 富盛光电（吴江）有限公司 | Double-sided structure of upper plate of double-layer composite plate of triangular pyramid of MINI LED light splitting plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023159802A1 (en) * | 2022-02-24 | 2023-08-31 | 富盛光电（吴江）有限公司 | Beam splitting plate and backlight module having beam splitting plate |
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| Publication number | Publication date |
|---|---|
| WO2023159802A1 (en) | 2023-08-31 |
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Application publication date: 20220520 |
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