CN217112965U - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN217112965U CN217112965U CN202122822980.1U CN202122822980U CN217112965U CN 217112965 U CN217112965 U CN 217112965U CN 202122822980 U CN202122822980 U CN 202122822980U CN 217112965 U CN217112965 U CN 217112965U
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Abstract
The embodiment of the utility model discloses a backlight module and a display device, which comprises a backboard and a plurality of light source units arranged on the backboard in an array manner; the light source unit is provided with four first light emitting surfaces which are arranged in a surrounding mode, the first light emitting surfaces are perpendicular to the back plate, a second light emitting surface is further arranged on one side, away from the back plate, of the light source unit, and the second light emitting surface is perpendicular to the four first light emitting surfaces; each light source unit includes a first light source and a second light source, which emit light rays of different colors. The embodiment of the utility model provides a to realize having improved whole backlight unit homogeneity of giving out light and showing the quality.
Description
Technical Field
The embodiment of the utility model provides a relate to and show technical field, especially relate to a backlight module and display device.
Background
The liquid crystal display device has many advantages of thin body, power saving, no radiation, etc., and is widely used. Most of the conventional lcd devices are backlight type lcd devices, and since the lcd panel does not emit light, the backlight module is one of the key components of the lcd device because the backlight module provides a light source to normally display images.
The direct type backlight module has the advantages of simple structure, low cost, high brightness, high uniformity and accurate backlight control, but the defects are obvious, the thickness of the backlight module is large, and if the thickness of the backlight module is too thin, the display picture is uneven, the display effect is poor and the like.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a backlight module and display device to it is inhomogeneous to solve backlight module display picture, the poor problem of display effect.
In a first aspect, an embodiment of the present invention provides a backlight module, which includes a back plate, and a plurality of light source units mounted on the back plate and arranged in an array;
the light source unit is provided with four first light emitting surfaces which are arranged in a surrounding mode, the first light emitting surfaces are perpendicular to the back plate, a second light emitting surface is further arranged on one side, away from the back plate, of the light source unit, and the second light emitting surface is perpendicular to the four first light emitting surfaces;
each of the light source units includes a first light source and a second light source, which emit light rays of different colors.
In a second aspect, the embodiment of the present invention further provides a display device, including the above backlight module.
The embodiment of the utility model provides a, have the luminous light source unit array of five sides through the setting and arrange on the backplate, every light source unit's first luminous surface sets up with the backplate is perpendicular, the second luminous surface sets up with first luminous surface is perpendicular, with the luminous angle of increase light source unit, and simultaneously, every light source unit has the first light source and the second light source of different luminous colours, make and evenly mix the light between first light source and the second light source, can also make and mix the light between the adjacent light source unit simultaneously, whole backlight unit luminous homogeneity and display quality have been improved.
Drawings
Fig. 1 is a schematic plan view of a backlight module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a light source unit according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a light source unit according to an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of another backlight module according to an embodiment of the present invention;
fig. 6 is a schematic cross-sectional view illustrating another backlight module according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic plan view of a backlight module according to an embodiment of the present invention, fig. 2 is a schematic structural view of a light source unit according to an embodiment of the present invention, fig. 3 is a schematic sectional structural view of a light source unit according to an embodiment of the present invention, and as shown in fig. 1 to 3, the backlight module 1 includes a back plate 10 and a plurality of light source units 20 mounted on the back plate 10 and arranged in an array; the light source unit 20 is provided with four first light emitting surfaces 201 arranged in a surrounding manner, the first light emitting surfaces 201 are perpendicular to the backboard 10, a second light emitting surface 202 is further arranged on one side of the light source unit 20 away from the backboard 10, and the second light emitting surface 202 is perpendicular to the four first light emitting surfaces 201; each light source unit 20 includes a first light source 203 and a second light source 204, and the first light source 203 and the second light source 204 emit light rays of different colors.
Specifically, four first light emitting surfaces 201 of the light source unit 20 are disposed around and perpendicular to the back plate 10 to form a columnar structure, and the second light emitting surface 202 is perpendicular to the first light emitting surfaces 201, so that the overall structure of the light source unit 20 is similar to a rectangular body, the first light source 203 and the second light source 204 disposed inside the light source unit 20 can emit light through the first light emitting surfaces 201, the light emitting direction can be parallel to a plane formed by the first direction X and the second direction Y, and can also emit light through the second light emitting surface 202, the light emitting direction is parallel to the third direction Z, and meanwhile, a plurality of light source arrays are disposed on the back plate, the distance between adjacent light source units 20 can be adaptively adjusted according to actual conditions, and in this embodiment, no special limitation is made, so that the maximization of the light emitting angle of the light source unit 20 is ensured, the light emitting brightness is increased, and the light emitting quality is improved.
Further, first light source 203 and second light source 204 send the light of different colours, the mode that utilizes double-colored light source to arouse phosphor powder and produce white light can improve NTSC1931 color gamut value, exemplarily, first light source 203 sends the blue light, second light source 204 sends the green glow, so first light source 203 and second light source 204 can mix the light, adjacent light source unit 20 can also mix the light simultaneously, the homogeneity that backlight unit 1 mixes the light has been increased, improve backlight unit 1's luminous quality.
The embodiment of the utility model provides an in, arrange on the backplate through setting up the light source unit array that has five-sided luminescence, the first luminous surface and the perpendicular setting of backplate of every light source unit, the second luminous surface sets up with first luminous surface is perpendicular, with the luminous angle of increase light source unit, and simultaneously, every light source unit has the first light source and the second light source of different luminous colours, make and evenly mix the light between first light source and the second light source, can also make and mix the light between the adjacent light source unit simultaneously, whole backlight unit luminous homogeneity and display quality have been improved.
Optionally, the first light source 203 is a blue light source, the second light source 204 is a green light source, and blue light emitted by the first light source 203 can be mixed with green light emitted by the second light source 204 in the same light source unit 20, and can also be mixed with green light emitted by an adjacent light source unit 20, so that uniformity of mixed light is enhanced.
Optionally, fig. 4 is a schematic cross-sectional structure view of a backlight module according to an embodiment of the present invention, as shown in fig. 4, the backlight module 1 further includes a diffuser plate 30, and the diffuser plate 30 is disposed on a side of the second light emitting surface 202 away from the back plate 10; the diffuser plate 30 includes a fluorescent layer 301 disposed on a side facing the second light emitting surface 202.
Specifically, the diffusion plate 30 is used for performing light equalization processing on the light emitted by the light source unit 20, the fluorescent layer 301 facing one side of the second light emitting surface 202 of the diffusion plate 30 comprises fluorescent powder, and the light emitted by the light source unit 20 excites the fluorescent powder and then is mixed to form white light, so that the obtained white light is more uniform, the thickness of the backlight module 1 is reduced, and the influence of the heat generated by light emission of the light source unit 20 on the luminous efficiency of the fluorescent powder is reduced.
Further, the phosphor powder can be disposed in the diffusion plate 30, that is, the diffusion plate 30 includes the phosphor powder, so that the thickness of the backlight module 1 can be further reduced, and the uniformity of light mixing can be improved.
Optionally, the phosphor in the diffusion plate 30 includes red phosphor.
Specifically, the red phosphor material may be at least one of nitride, fluoride, KSF, and silicate. Illustratively, the nitride red phosphor may be (Ca, Sr) SiAlN 3: eu2+, CaAlSi (ON) 3: eu2+, etc., and the fluoride may be AxMFy: mn4+, where a ═ Li, Na, K, Ca, Sr, Ba, etc., M ═ Si, Al, Y, Sc, etc.
For example, the first light source 203 emits blue light, the second light source 204 emits green light, because the green wavelength and the red wavelength are relatively close and the energy difference is relatively small, the green light LED chip cannot excite the red phosphor to make the red phosphor emit red light, the blue light LED chip excites the red phosphor to emit red light, the red light and the blue light are mixed to form red light, magenta and green are complementary colors, magenta and green are mixed to form white light, and the white light thus formed has a relatively high color gamut and good stability.
Optionally, fig. 5 is a schematic cross-sectional structure view of another backlight module according to an embodiment of the present invention, as shown in fig. 5, the backlight module 1 further includes a film 40, and the film 40 is disposed on one side of the diffusion plate 30 away from the back plate 10.
Specifically, the film 40 may be an optical film for assisting the display of the liquid crystal display device such as a polarizer, so as to realize uniform diffusion of light from the light source, so that the backlight module 1 emits light more uniformly, thereby avoiding the problem of light spots.
Optionally, as shown in fig. 3 and 5, a distance between the second light emitting surface 202 of the light source unit 20 and the diffusion plate 30 is 0mm to 5 mm.
Specifically, the light source units 20 can emit light through five surfaces, and the light emitted by the first light emitting surface 201 and the light emitted by the second light emitting surface 202 between the adjacent light source units 20 can be sufficiently and uniformly mixed, so that the light mixing distance between the second light emitting surface 202 and the diffuser plate 30 is reduced, especially when the distance between the second light emitting surface 202 of the light source unit 20 and the diffuser plate 30 is 0mm, that is, the second light emitting surface 202 and the diffuser plate 30 are attached to each other, the light source units 20 can still mix light through the light emitted by the first light emitting surface 201, the uniformity of the light mixing is not affected, and thus the thickness of the backlight module 1 is further reduced.
Further, if the thickness of the back module 1 is too thin, a lamp shadow will appear on the display image, which is mainly caused by the strong light emitting of the second light emitting surface 202, so optionally, the second light emitting surface 202 is coated with phosphor.
Specifically, the light emitting intensity of the second light emitting surface 202 of the light source unit 20 is related to the material thereof, for example, the light emitting intensity can be polycarbonate material, and the thickness of the phosphor coated on the second light emitting surface 202 can be adaptively changed according to the material, so as to change the light emitting intensity of the second light emitting surface 202, thereby avoiding the phenomenon of uneven light emission caused by the occurrence of lamp shadow.
Optionally, fig. 6 is a schematic cross-sectional structure view of another backlight module according to an embodiment of the present invention, as shown in fig. 6, the back plate 10 includes a circuit board 101, and a plurality of light source units 20 arranged in an array are attached to the circuit board 101; the surface of the back sheet 10 on the side facing the light source unit 20 is coated with white ink.
Specifically, circuit board 101 can set up in backplate 10 towards one side of light source unit 20, so will be the attached setting on circuit board 101 of a plurality of light source unit 20 that the array was arranged, also can set up circuit board 101 in the inside of backplate 10, is connected light source unit 20 and circuit board 101 electricity through modes such as punch on backplate 10, concrete implementation, the embodiment of the utility model provides a do not limit to this. Preferably, the circuit board 101 is disposed inside the back plate 10, so that the thickness of the backlight module 1 can be further reduced and the backlight module can be more lightweight and thinner.
Further, the surface of the side of the back plate 10 facing the light source unit 20 is coated with white ink, which has a reflective effect, so that the light emitted by the first light source 203 and the light emitted by the second light source 204 can be sufficiently mixed, the uniformity of the mixed light is improved, and meanwhile, the thickness of the backlight module can be further reduced by coating the white ink to replace the effect of the reflective sheet.
Optionally, as shown in fig. 3 and fig. 6, the circuit board 101 independently controls whether the first light source 203 emits light or not, and the circuit board 101 also independently controls whether the second light source 204 emits light or not.
Specifically, the first light source 203 and the second light source 204 can be controlled by different electrodes, so that each light source can obtain light with required brightness, the light attenuations of the first light source 203 and the second light source 204 are consistent, white light with a higher color gamut can be obtained, and the color rendering of the liquid crystal display device is enhanced.
Based on same design, the embodiment of the utility model provides a still provide a display device, fig. 7 is the utility model provides a display device's schematic structure diagram, as shown in fig. 7, the utility model provides a display device includes the utility model discloses arbitrary embodiment backlight unit 1, display device 2 can be for as shown in fig. 7 the cell-phone, also can be for computer, TV set, intelligent wearing equipment etc. this embodiment does not do special restriction to this.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (9)
1. A backlight module, comprising: the backlight module comprises a back plate and a plurality of light source units which are arranged on the back plate in an array manner;
the light source unit is provided with four first light emitting surfaces which are arranged in a surrounding mode, the first light emitting surfaces are perpendicular to the back plate, a second light emitting surface is further arranged on one side, away from the back plate, of the light source unit, and the second light emitting surface is perpendicular to the four first light emitting surfaces;
each light source unit comprises a first light source and a second light source, and the first light source and the second light source emit light rays with different colors;
the second light emitting surface is coated with fluorescent powder;
the back plate comprises a circuit board, and the light source unit is electrically connected with the circuit board by punching the back plate.
2. The backlight module as claimed in claim 1, wherein the first light source is a blue light source and the second light source is a green light source.
3. The backlight module according to claim 1, further comprising a diffuser plate disposed on a side of the second light emitting surface away from the back plate;
the diffusion plate comprises a fluorescent layer arranged on one side facing the second light-emitting surface; or
The diffusion plate comprises fluorescent powder.
4. A backlight module according to claim 3, wherein the phosphors comprise red phosphors.
5. The backlight module according to claim 3, further comprising a film disposed on a side of the diffuser plate away from the back plate.
6. The backlight module as claimed in claim 3, wherein the distance between the second light-emitting surface of the light source unit and the diffuser plate is 0mm to 5 mm.
7. The backlight module according to claim 1, wherein a side surface of the back plate facing the light source unit is coated with white ink.
8. The backlight module as claimed in claim 1, wherein the circuit board independently controls whether the first light source emits light or not, and the circuit board also independently controls whether the second light source emits light or not.
9. A display device comprising the backlight module according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122822980.1U CN217112965U (en) | 2021-11-17 | 2021-11-17 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122822980.1U CN217112965U (en) | 2021-11-17 | 2021-11-17 | Backlight module and display device |
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| CN217112965U true CN217112965U (en) | 2022-08-02 |
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| CN202122822980.1U Active CN217112965U (en) | 2021-11-17 | 2021-11-17 | Backlight module and display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024051256A1 (en) * | 2022-09-07 | 2024-03-14 | 惠州视维新技术有限公司 | Backlight module, display device, and backlight module manufacturing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024051256A1 (en) * | 2022-09-07 | 2024-03-14 | 惠州视维新技术有限公司 | Backlight module, display device, and backlight module manufacturing method |
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