CN116819829A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN116819829A CN116819829A CN202311103509.4A CN202311103509A CN116819829A CN 116819829 A CN116819829 A CN 116819829A CN 202311103509 A CN202311103509 A CN 202311103509A CN 116819829 A CN116819829 A CN 116819829A
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- light
- lamp panel
- guide plate
- backlight module
- chip
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- 239000002096 quantum dot Substances 0.000 claims abstract description 36
- 230000005540 biological transmission Effects 0.000 claims abstract description 32
- 230000007306 turnover Effects 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 44
- 238000003466 welding Methods 0.000 claims description 39
- 230000004308 accommodation Effects 0.000 claims description 16
- 239000012788 optical film Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 29
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 15
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 238000000695 excitation spectrum Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The invention discloses a backlight module and display equipment. The backlight module comprises a back plate, a lamp panel assembly and a light guide plate, wherein the lamp panel assembly is arranged on the bottom wall of the back plate, and the light guide plate is arranged on one side of the lamp panel assembly, which is away from the bottom wall; the backlight module further comprises a white light source, a blue light chip and a driving assembly; the white light source is arranged on the first surface; the blue light chip is arranged on the second surface; the light guide plate is provided with quantum dots, and the quantum dots are arranged corresponding to the blue light chip; the driving assembly is in transmission connection with the lamp panel assembly and can drive the lamp panel assembly to turn over; when the driving assembly drives the lamp panel assembly to rotate to a first state, the first surface faces the light guide plate, and the white light source is lightened; when the driving assembly drives the lamp panel assembly to rotate to the second state, the second surface faces the light guide plate, and the blue light chip is lighted. The technical scheme of the invention can realize the effect of switching between the high-color-gamut light-emitting mode and the low-color-gamut light-emitting mode.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a backlight module and a display device using the backlight module.
Background
Along with development of technology, the technology of display devices is also mature, pursuing panel color gamut and thickness on the market is also higher, and a traditional Mini led (Mini Light-Emitting Diode) display screen can realize high color gamut, but because a quantum dot film needs to be arranged, a plurality of layers of Light homogenizing films need to be arranged in the quantum dot film, the thickness of the whole backlight module is thicker, the price is higher, and the like, and the traditional display devices do not have the advantage of switchable high and low color gamuts.
Disclosure of Invention
The invention mainly aims to provide a backlight module which aims to achieve the effect that display equipment is switched between a high color gamut and a low color gamut.
In order to achieve the above purpose, the backlight module provided by the invention comprises a back plate, a lamp plate assembly and a light guide plate, wherein the lamp plate assembly is arranged on the bottom wall of the back plate, and the light guide plate is arranged on one side of the lamp plate assembly, which is away from the bottom wall; the backlight module further comprises a white light source, a blue light chip and a driving assembly; the white light source is arranged on the first surface; the blue light chip is arranged on the second surface; the light guide plate is provided with quantum dots, and the quantum dots are arranged corresponding to the blue light chip; the driving assembly is in transmission connection with the lamp panel assembly and can drive the lamp panel assembly to turn over; when the driving assembly drives the lamp panel assembly to rotate to a first state, the first surface faces the light guide plate, and the white light source is lightened; when the driving assembly drives the lamp panel assembly to rotate to a second state, the second surface faces the light guide plate, and the blue light chip is lightened.
In one embodiment, the lamp panel assembly includes:
a substrate having the first surface and the second surface; the driving component is in transmission connection with the base plate; and
the lamp panel body, the lamp panel body is fixed to be located the diapire, be formed with the accommodation chamber in the lamp panel body, the base plate white light source and blue light chip all are located the accommodation intracavity, just the accommodation chamber has the orientation the light outlet of one side of light guide plate.
In one embodiment, the first surface is provided with a first welding spot, and the white light source is connected to the first welding spot; the second surface is provided with a second welding spot, and the blue light chip is connected with the second welding spot; the cavity wall of the accommodating cavity of the lamp panel body is provided with a third welding spot;
when the substrate rotates to the first state, the first welding point is contacted with the third welding point; and when the substrate rotates to the second state, the second welding point is contacted with the third welding point.
In an embodiment, a plurality of rows of accommodating cavities are formed in the lamp panel body, a plurality of base plates are arranged, each base plate is respectively arranged in one accommodating cavity, and each base plate is in transmission connection with one driving component.
In one embodiment, the white light source comprises:
the light-emitting chip is arranged on the first surface;
the light-transmitting cover is covered outside the light-emitting chip; and
and the fluorescent powder is arranged on the inner surface of the light-transmitting cover or the outer surface of the light-emitting chip.
In an embodiment, the cross-sectional area of the light-transmitting cover gradually increases from a side closer to the first surface to a side farther from the first surface.
In an embodiment, a light diffusing structure opposite to the blue light chip is disposed on a side of the light guide plate facing the lamp panel assembly, and the quantum dots are disposed in the light guide plate and located on the light diffusing structure.
In one embodiment, the drive assembly includes:
a motor;
the driving gear is in transmission connection with the motor;
a driven gear engaged with the driving gear; and
and one end of the rotating shaft is in transmission connection with the driven gear, and the other end of the rotating shaft is in transmission connection with the lamp panel assembly.
In an embodiment, the backlight module further includes an optical film, and the optical film is disposed on a side of the light guide plate away from the lamp panel assembly.
The invention also provides display equipment, which comprises a display panel and the backlight module, wherein the display panel is arranged on the light emitting side of the backlight module.
According to the technical scheme, the lamp panel assembly is arranged between the bottom wall of the backboard and the light guide plate, the white light source and the blue light chip are respectively arranged on the first surface and the second surface of the lamp panel assembly, which are opposite to each other, and the lamp panel assembly is in transmission connection with the driving assembly, and the driving assembly is used for driving the lamp panel assembly to rotate, so that the lamp panel assembly has a first state in which the first surface faces the light guide plate and a second state in which the second surface faces the light guide plate when rotating. Wherein, when the first surface is faced to the light guide plate, the white light source is lighted, so that the white light source emits white light and emits the white light to the light guide plate, thereby realizing the effect of low color gamut light emission. When the second surface is facing the light guide plate, the blue light chip is lighted, and blue light emitted by the blue light chip is emitted to the light guide plate. By arranging the quantum dots at the positions of the light guide plate corresponding to the blue light chip, the blue light excites the quantum dots and emits white light with higher purity, so that the effect of high-color-gamut light emission is realized. Therefore, the lamp panel assembly is driven to overturn through the driving assembly, and the effect that the backlight module is switched between the low-color-gamut light-emitting state and the high-color-gamut light-emitting state is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a backlight module according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a portion of a mounting structure of a light guide plate, a light panel assembly, a white light source and a blue light chip in a backlight module according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a portion of a mounting structure of a light panel assembly, a white light source and a blue light chip in a backlight module according to an embodiment of the invention;
FIG. 4 is a schematic diagram showing a transmission connection between a substrate and a driving assembly in a lamp panel assembly of a backlight module according to an embodiment of the invention;
fig. 5 is a schematic cross-sectional view of an embodiment of a display device according to a second embodiment of the invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Embodiment one:
the invention provides a backlight module 100.
In the embodiment of the present invention, referring to fig. 1 to 3, the backlight module 100 includes a back plate 110, a lamp panel assembly 120 and a light guide plate 150, wherein the lamp panel assembly 120 is disposed on a bottom wall of the back plate 110, and the light guide plate 150 is disposed on a side of the lamp panel assembly 120 facing away from the bottom wall; the lamp panel assembly 120 has a first surface 1221 and a second surface 1222 opposite to each other, and the backlight module 100 further includes a white light source 130, a blue light chip 140, and a driving assembly 170; the white light source 130 is disposed on the first surface 1221; the blue light chip 140 is disposed on the second surface 1222; the light guide plate 150 is provided with quantum dots 160, and the quantum dots 160 are arranged corresponding to the blue light chip 140; the driving assembly 170 is in transmission connection with the lamp panel assembly 120 and can drive the lamp panel assembly 120 to turn over; when the driving assembly 170 drives the lamp panel assembly 120 to rotate to the first state, the first surface 1221 faces the light guide plate 150, and the white light source 130 is turned on; when the driving assembly 170 drives the lamp panel assembly 120 to rotate to the second state, the second surface 1222 faces the light guide plate 150, and the blue light chip 140 is turned on.
The lamp panel assembly 120 refers to a panel assembly for supplying power to a light source, and may include only one panel structure with wires, or may include two panel structures with wires and assembled together. The lamp panel assembly 120 of the backlight module 100 has a first surface 1221 and a second surface 1222 opposite to each other, and the first surface 1221 is provided with the white light source 130, so that the white light source 130 can emit white light. The second surface 1222 is provided with the blue light chip 140, and the blue light chip 140 may emit blue light. In the present disclosure, the lamp panel assembly 120 is further connected to a driving assembly 170, and the driving assembly 170 is used for driving the lamp panel assembly 120 to rotate, so that the lamp panel assembly 120 has a first state in which the first surface 1221 faces the light guide plate 150 and a second state in which the second surface 1222 faces the light guide plate 150. When the first surface 1221 faces the light guide plate 150, the light emitted from the white light source 130 can be emitted through the light guide plate 150, and the backlight module 100 is in the low color gamut mode. Specifically, the white light source 130 includes a blue light emitting chip 131 and a transparent cover 132 disposed outside the blue light emitting chip 131, wherein the transparent cover 132 is provided with red phosphor and green phosphor, the red phosphor is excited by the light emitted by the blue light emitting chip 131 to generate red light, the green phosphor is excited by the light emitted by the blue light emitting chip 131 to generate green light, and the generated red light and green light are combined with the blue light to form white light.
And when the second surface 1222 is directed toward the light guide plate 150, light emitted from the blue light chip 140 is directed toward the light guide plate 150. According to the invention, the quantum dots 160 are arranged at the positions of the light guide plate 150 corresponding to the blue light chips 140, so that the blue light can excite the quantum dots 160 on the light guide plate 150 when passing through the light guide plate 150, and white light with higher purity is finally emitted from the light emitting surface of the light guide plate 150. The process of forming white light after the blue light chip 140 excites the red quantum dot and the green quantum dot is as follows: the blue light excites the red quantum dots and the green quantum dots to generate red light and green light, and the generated red light and green light are combined with the penetrated blue light to form white light with higher purity, and the backlight module 100 is in a high color gamut mode. It should be noted that, since a specific quantum dot 160 is only excited by a light with a specific wavelength, for example, blue light can excite the quantum dot 160, while white light cannot excite the same quantum dot 160, the quantum dot 160 has no effect in the low color gamut mode.
It will be appreciated that the process of forming white light after blue light excites the red and green phosphors is similar to the excitation process of forming white light after blue light excites the red and green quantum dots, but because the quantum dot 160 material has a broad excitation spectrum and a narrow emission spectrum (the half-width of the emission is typically about 30 nm), the red and green colors of the quantum dot 160 backlight are more pure and a higher color gamut can be achieved than the phosphor 133 backlight. Therefore, the color gamut of the white light formed by mixing blue light with the phosphor 133 is lower than the color gamut of the white light formed by exciting the quantum dots 160, so that the first surface 1221 of the lamp panel assembly 120 has a low color gamut light-emitting effect when facing the light guide plate 150, and the second surface 1222 of the lamp panel assembly 120 has a high color gamut light-emitting effect when facing the light guide plate 150. The lamp panel assembly 120 is driven to rotate by the driving assembly 170, so that the switching effect between the high-color-gamut light-emitting state and the low-color-gamut light-emitting state can be realized.
In the technical solution of the present invention, the white light source 130 and the blue light chip 140 on the lamp panel assembly 120 may be always in a turned-on state, that is, the white light source 130 and the blue light chip 140 may be respectively connected with different circuits, so that the circuits between the two may not interfere with each other, and the white light source 130 and the blue light chip 140 are both in a turned-on state. Alternatively, one of the white light source 130 and the blue light chip 140, which faces the light guide plate 150, is lighted. Specifically, when the lamp panel assembly 120 is rotated to the first surface 1221 toward the light guide plate 150, only the white light source 130 is turned on, and the blue light chip 140 facing away therefrom is in an off state; when the lamp panel assembly 120 is rotated to the second surface 1222 toward the light guide plate 150, only the blue light chip 140 is lighted, and the white light source 130 opposite thereto is in an off state.
Specifically, the drive assembly 170 may include only the motor 171, i.e., the lamp panel assembly 120 is directly in driving connection with the motor 171. Or the driving assembly 170 may include a motor 171 and a transmission assembly, where the transmission assembly may be a gear assembly or a link assembly, and one end of the transmission assembly is in transmission connection with the motor 171, and the other end of the transmission assembly is in transmission connection with the lamp panel assembly 120, so as to achieve the effect of driving the lamp panel assembly 120 to rotate.
In the technical solution of the present invention, by disposing the lamp panel assembly 120 between the bottom wall of the back plate 110 and the light guide plate 150, the first surface 1221 and the second surface 1222 of the lamp panel assembly 120 opposite to each other are respectively provided with the white light source 130 and the blue light chip 140, and the lamp panel assembly 120 is in transmission connection with the driving assembly 170, and the driving assembly 170 is used for driving the lamp panel assembly 120 to rotate, when the lamp panel assembly 120 rotates, the first surface 1221 faces the first state of the light guide plate 150 and the second surface 1222 faces the second state of the light guide plate 150. Wherein, when the first surface 1221 faces the light guide plate 150, the white light source 130 is lighted, so that the white light source 130 emits white light and emits the white light toward the light guide plate 150, thereby realizing the effect of low color gamut light emission. When the second surface 1222 is directed toward the light guide plate 150, the blue light chip 140 is lighted, and blue light emitted from the blue light chip 140 is directed toward the light guide plate 150. By arranging the quantum dots 160 at the positions of the light guide plate 150 corresponding to the blue light chip 140, the blue light excites the quantum dots 160 and emits white light with higher purity, so that the effect of high color gamut light emission is realized. Therefore, the driving assembly 170 drives the lamp panel assembly 120 to turn over, so as to achieve the effect of switching the backlight module 100 between the low color gamut light emitting state and the high color gamut light emitting state.
Further, referring to fig. 2 and 3 in combination, the lamp panel assembly 120 includes a substrate 122 and a lamp panel body 121, the substrate 122 having a first surface 1221 and a second surface 1222; the driving assembly 170 is in transmission connection with the base plate 122; the lamp panel body 121 is fixedly arranged on the bottom wall, a containing cavity 1211 is formed in the lamp panel body 121, the substrate 122, the white light source 130 and the blue light chip 140 are all arranged in the containing cavity 1211, and the containing cavity 1211 is provided with a light outlet 1212 facing one side of the light guide plate 150.
The lamp panel body 121 is a panel body for accessing a power supply. The substrate 122 is a board body for mounting the white light source 130 and the blue light chip 140. The substrate 122 may be an aluminum substrate 122 or a ceramic substrate 122, etc. Since the white light source 130 and the blue light chip 140 are mounted on the substrate 122, the white light source 130 and the blue light chip 140 emit more heat in the working state. In order to achieve a better heat dissipation effect, the optional substrate 122 is an aluminum substrate 122. The lamp panel body 121 is generally thicker, the lamp panel body 121 is fixedly arranged on the bottom wall, the accommodating cavity 1211 is formed inside the lamp panel body 121, and the substrate 122 is arranged in the accommodating cavity 1211, so that the volume of the substrate 122 is smaller than that of the lamp panel body 121. By connecting the driving assembly 170 with the base plate 122 in a driving manner, the first surface 1221 and the second surface 1222 are disposed on the base plate 122, so that the driving assembly 170 only drives the base plate 122 to rotate, and the space occupied during rotation can be reduced. Specifically, the substrate 122 is elongated, and the axis of the driving assembly 170 extends along the length direction of the substrate 122 when the substrate 122 is driven to rotate, so as to further reduce the space occupied by the substrate 122 when it rotates. Meanwhile, the substrate 122 is configured as a strip shape, the first surface 1221 of the substrate 122 may be provided with a plurality of white light sources 130 disposed at intervals along the length direction of the substrate 122, and the second surface 1222 may be provided with a plurality of blue light chips 140 disposed at intervals along the length direction of the substrate 122, so that when the driving assembly 170 drives one substrate 122 to rotate, the plurality of white light sources 130 and the blue light chips 140 on the substrate 122 can be simultaneously driven to rotate together, thereby reducing driving cost.
In addition, by disposing the substrate 122, the white light source 130 and the blue light chip 140 in the accommodation cavity 1211, and disposing the light outlet 1212 on the side of the accommodation cavity 1211 facing the light guide plate 150, it is ensured that the light emitted from the light source on the side of the light guide plate 150 can be emitted from the light outlet 1212, so as to avoid the risk of shielding light.
Further, as shown in fig. 3, the first surface 1221 is provided with a first welding spot 1221a, and the white light source 130 is connected to the first welding spot 1221a; the second surface 1222 is provided with a second solder joint 1222a, and the blue light chip 140 is connected to the second solder joint 1222a; the cavity wall of the accommodating cavity 1211 of the lamp panel body 121 is provided with a third welding spot; when the substrate 122 rotates to the first state, the first welding point 1221a contacts the third welding point; when the substrate 122 rotates to the second state, the second pads 1222a contact the third pads.
When the substrate 122 rotates to the first state, the first welding point 1221a contacts with the third welding point, so that the white light source 130 is turned on, and the white light source 130 is powered on, so that the white light source 130 emits white light, and the light-emitting plate 150 can emit light with a low color gamut. Meanwhile, the blue chip 140 may or may not emit light. In order to achieve the effect that the blue light chip 140 emits light, a welding spot may be disposed on a side of the accommodation cavity 1211 of the lamp panel body 121 away from the light guide plate 150, so that when the blue light chip 140 faces away from the light guide plate 150, the second welding spot 1222a on the second surface 1222 is also contacted with the welding spot on the side of the accommodation cavity 1211 away from the light guide plate 150, thereby ensuring that the blue light chip 140 emits light. In order to achieve the effect that the blue light chip 140 does not emit light, the side of the accommodation cavity 1211 of the lamp panel body 121 far away from the light guide plate 150 is not provided with a welding spot, so that when the blue light chip 140 faces away from the light guide plate 150, the second welding spot 1222a on the second surface 1222 is not contacted with any welding spot in the accommodation cavity 1211, and further the effect that the blue light chip 140 does not emit light is achieved.
When the substrate 122 rotates to the second state, the second welding spot 1222a contacts with the third welding spot, so that the blue light chip 140 is turned on, and the blue light chip 140 is powered on, so that the blue light chip 140 emits blue light, and the quantum dots 160 can be excited by the light guide plate 150 to perform the high color gamut light emitting effect. Meanwhile, the white light source 130 may or may not emit light. In order to achieve the effect that the white light source 130 emits light, a welding spot may be disposed on a side of the accommodation cavity 1211 of the lamp panel body 121 away from the light guide plate 150, so that when the white light source 130 is away from the light guide plate 150, the first welding spot 1221a on the first surface 1221 is also contacted with the welding spot on the side of the accommodation cavity 1211 away from the light guide plate 150, thereby ensuring that the white light source 130 emits light. In order to achieve the effect that the white light source 130 does not emit light, the side of the accommodation cavity 1211 of the lamp panel body 121 far away from the light guide plate 150 is not provided with welding spots, so that when the white light source 130 faces away from the light guide plate 150, the first welding spots 1221a on the first surface 1221 are not contacted with any welding spots in the accommodation cavity 1211, and further the effect that the white light source 130 does not emit light is achieved.
Further, a plurality of rows of accommodating cavities 1211 are disposed in the lamp panel body 121, a plurality of substrates 122 are disposed in the plurality of rows, each substrate 122 is disposed in one of the accommodating cavities 1211, and each substrate 122 is in driving connection with a driving assembly 170.
By providing a plurality of rows of receiving cavities 1211 in the lamp panel body 121, at least one substrate 122 can be disposed in each receiving cavity 1211, so that the effect of providing a plurality of rows of light emitting sources on the lamp panel assembly 120 can be achieved, and the backlight module 100 has a uniform light emitting effect. By arranging each substrate 122 in a housing 1211, each substrate 122 is in transmission connection with a driving component 170, so that each driving component 170 can turn over at least one row of light sources at the same time, and at least one row of white light sources 130 can be simultaneously directed towards the light guide plate 150 or at least one row of blue light chips 140 can be simultaneously directed towards the light guide plate 150, thereby improving driving efficiency and reducing driving cost. In addition, by driving each driving component 170 to a substrate 122, the states of the light emitting sources among different rows are not interfered with each other, so that the light emitting effect can be controlled in a partitioned or separated mode.
In an example, as shown in fig. 3, the white light source 130 includes a light emitting chip 131, a light-transmitting cover 132, and a phosphor 133, where the light emitting chip 131 is disposed on the first surface 1221; the light-transmitting cover 132 is covered outside the light-emitting chip 131; the phosphor 133 is provided on the inner surface of the light-transmitting cover 132 or the outer surface of the light-emitting chip 131.
By arranging the light-transmitting cover 132 outside the light-emitting chip 131, the light-transmitting cover 132 can have a good protection effect on the light-emitting chip 131. By disposing the phosphor 133 on the inner surface of the light-transmitting cover 132 or the outer surface of the light-emitting chip 131, the light emitted from the light-emitting chip 131 can excite the phosphor 133, thereby finally emitting white light. Specifically, the light emitting chip 131 may be a blue light chip 140, the phosphor 133 includes red phosphor and green phosphor, the light emitted from the blue light emitting chip 131 excites the red phosphor 133 to generate red light, the light emitted from the blue light emitting chip 131 excites the green phosphor 133 to generate green light, and the generated red light and green light are combined with the blue light to form white light.
Further, referring to fig. 1 to 3, the cross-sectional area of the transparent cover 132 gradually increases from the side close to the first surface 1221 to the side far from the first surface 1221.
When the lamp panel assembly 120 is rotated to the first state, the first surface 1221 faces the light guide plate 150, so that the light emitting angle of the white light source 130 can be increased, and the backlight module 100 has a more uniform light emitting effect.
Further, referring to fig. 1 and 2 in combination, a light diffusing structure 151 disposed opposite to the blue light chip 140 is disposed on a side of the light guide plate 150 facing the lamp panel assembly 120, and the quantum dots 160 are disposed in the light guide plate 150 and located on the light diffusing structure 151.
The light diffusing structure 151 may be a pit or a bump provided on a side of the light guide plate 150 facing the lamp panel assembly 120. By arranging the light diffusing structure 151 on the side of the light guiding plate 150 facing the lamp panel assembly 120, and arranging the light diffusing structure 151 opposite to the blue light chip 140, the light emitted by the blue light chip 140 passes through the light diffusing structure 151 of the light guiding plate 150 to form a larger light emitting angle, so as to re-excite the quantum dots 160 on the light diffusing structure 151, thereby improving the excitation efficiency and the utilization rate of the quantum dots 160. In addition, since the quantum dots 160 are disposed in the light guide plate 150 and are disposed on the light scattering structure 151, the blue light excites the quantum dots 160 to emit red light and green light, so that the blue light, the red light and the green light are mixed into white light with a high color gamut and then emitted from the light emitting surface of the light guide plate 150, and the backlight module 100 can achieve the effect of emitting light with a high color gamut.
Of course, when the white light source 130 is opposite to the light guide plate 150, the white light emitted by the white light source 130 still passes through the light scattering structure 151 to further scatter the white light, so as to achieve a more uniform light emitting effect.
In an example, referring to fig. 1 and 4 in combination, the driving assembly 170 includes a motor 171, a driving gear 172, a driven gear 173, and a rotating shaft 174; the driving gear 172 is in transmission connection with the motor 171; the driven gear 173 meshes with the driving gear 172; one end of the rotating shaft 174 is in transmission connection with the driven gear 173, and the other end is in transmission connection with the lamp panel assembly 120.
After the motor 171 is started, it drives the driving gear 172 to rotate, and then the driving gear 172 drives the driven gear 173 to rotate, and the driven gear 173 rotates to drive the rotating shaft 174 to rotate, and finally the rotating shaft 174 drives the lamp panel assembly 120 to rotate, so that the effect that the lamp panel assembly 120 does not need manual rotation is achieved. In addition, the motor 171 is in transmission connection with the gear assembly, so that the transmission stability of the transmission process is improved, and the transmission ratio is accurate, so that the lamp panel assembly 120 does not rotate too fast or too slow, and the lamp panel assembly 120 always maintains a relatively stable rotating speed, so that the stability of installation of each component on the lamp panel assembly 120 and the better switching speed during switching are ensured.
Further, as shown in fig. 1, the backlight module 100 further includes an optical film 180, and the optical film 180 is disposed on a side of the light guide plate 150 facing away from the lamp panel assembly 120.
By further providing the optical film 180 on the side of the light guide plate 150 facing away from the lamp panel assembly 120, the light emitting taste can be further improved, and the light emitting brightness and uniformity can be ensured to be more ideal.
Embodiment two:
the present invention also provides a display device, as shown in fig. 5, which includes a display panel 200 and a backlight module 100, where the specific structure of the backlight module 100 refers to the above embodiments, and since the display device adopts all the technical solutions of all the embodiments, at least the display device has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein. The display panel 200 is disposed on the light emitting side of the backlight module 100.
By arranging the display panel 200 on the light emitting side of the backlight module 100, the light emitted by the backlight module 100 can be emitted to the display panel 200, thereby being beneficial to the display panel 200 to display pictures. Specifically, based on the above-mentioned scheme that the backlight module 100 has the optical film 180, the side of the optical film 180 away from the light guide plate 150 is the light emitting side of the backlight module 100, and the display panel 200 may be disposed on the side of the optical film 180 away from the light guide plate 150.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (10)
1. The utility model provides a backlight unit, includes the backplate, locates the lamp plate subassembly of the diapire of backplate and locate the lamp plate subassembly deviates from the light guide plate of one side of diapire, its characterized in that, the lamp plate subassembly has first surface and the second surface of mutual dorsad, backlight unit still includes:
the white light source is arranged on the first surface;
the blue light chip is arranged on the second surface; the light guide plate is provided with quantum dots, and the quantum dots are arranged corresponding to the blue light chip; and
the driving assembly is in transmission connection with the lamp panel assembly and can drive the lamp panel assembly to turn over;
when the driving assembly drives the lamp panel assembly to rotate to a first state, the first surface faces the light guide plate, and the white light source is lightened; when the driving assembly drives the lamp panel assembly to rotate to a second state, the second surface faces the light guide plate, and the blue light chip is lightened.
2. The backlight module of claim 1, wherein the lamp panel assembly comprises:
a substrate having the first surface and the second surface; the driving component is in transmission connection with the base plate; and
the lamp panel body, the lamp panel body is fixed to be located the diapire, be formed with the accommodation chamber in the lamp panel body, the base plate white light source and blue light chip all are located the accommodation intracavity, just the accommodation chamber has the orientation the light outlet of one side of light guide plate.
3. The backlight module according to claim 2, wherein the first surface is provided with a first welding point, and the white light source is connected to the first welding point; the second surface is provided with a second welding spot, and the blue light chip is connected with the second welding spot; the cavity wall of the accommodating cavity of the lamp panel body is provided with a third welding spot;
when the substrate rotates to the first state, the first welding point is contacted with the third welding point; and when the substrate rotates to the second state, the second welding point is contacted with the third welding point.
4. The backlight module according to claim 2, wherein a plurality of rows of accommodating cavities are provided in the lamp panel body, a plurality of substrates are provided, each substrate is respectively provided in one of the accommodating cavities, and each substrate is in transmission connection with one of the driving assemblies.
5. The backlight module according to claim 1, wherein the white light source comprises:
the light-emitting chip is arranged on the first surface;
the light-transmitting cover is covered outside the light-emitting chip; and
and the fluorescent powder is arranged on the inner surface of the light-transmitting cover or the outer surface of the light-emitting chip.
6. The backlight module according to claim 5, wherein the cross-sectional area of the light-transmitting cover gradually increases from a side near the first surface to a side far from the first surface.
7. The backlight module according to claim 1, wherein a light diffusing structure opposite to the blue light chip is disposed on a side of the light guide plate facing the lamp plate assembly, and the quantum dots are disposed in the light guide plate and located on the light diffusing structure.
8. The backlight module according to any one of claims 1 to 7, wherein the driving assembly comprises:
a motor;
the driving gear is in transmission connection with the motor;
a driven gear engaged with the driving gear; and
and one end of the rotating shaft is in transmission connection with the driven gear, and the other end of the rotating shaft is in transmission connection with the lamp panel assembly.
9. The backlight module according to any one of claims 1 to 7, further comprising an optical film disposed on a side of the light guide plate facing away from the lamp panel assembly.
10. A display device comprising a display panel and a backlight module according to any one of claims 1 to 9, the display panel being arranged on the light exit side of the backlight module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311103509.4A CN116819829A (en) | 2023-08-30 | 2023-08-30 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311103509.4A CN116819829A (en) | 2023-08-30 | 2023-08-30 | Backlight module and display device |
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| CN116819829A true CN116819829A (en) | 2023-09-29 |
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| CN202311103509.4A Pending CN116819829A (en) | 2023-08-30 | 2023-08-30 | Backlight module and display device |
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Application publication date: 20230929 |