CN210605291U - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
- Publication number
- CN210605291U CN210605291U CN201921936346.7U CN201921936346U CN210605291U CN 210605291 U CN210605291 U CN 210605291U CN 201921936346 U CN201921936346 U CN 201921936346U CN 210605291 U CN210605291 U CN 210605291U
- Authority
- CN
- China
- Prior art keywords
- light
- color
- film
- quantum dot
- backlight module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The embodiment of the utility model discloses backlight module and liquid crystal display device. The backlight module comprises a plurality of light sources, a driving circuit board, a quantum dot film and a spectrum dichroic film, wherein a plurality of light source arrays are arranged on the driving circuit board, and the driving circuit board individually addresses and drives each light source; the quantum dot film is arranged on the light emitting side of the light source, the light source emits first color light, the quantum dot film converts the first color light into second color light and third color light, and the first color light, the second color light and the third color light are mixed to form white light; the spectral dichroic film is positioned between the quantum dot film and the light source, reflects the second color light and the third color light, and transmits the first color light. The embodiment of the utility model provides a guaranteed luminous efficiency, can reduce quantum dot film downward scattering light diffusion to the region that is not lighted simultaneously, solved the problem of the regional colour shift of not lighting that leads to when setting up white oil reservoir reflection among the current backlight unit.
Description
Technical Field
The embodiment of the utility model provides a relate to and show technical field, especially relate to a backlight module and liquid crystal display device.
Background
In a direct-lit backlight unit using quantum dot films, red-green quantum dot materials in the quantum dot films absorb blue light from micro LEDs and excite red-green light to generate red-green light, and the blue light and the red-green light of the micro LEDs are mixed to form white backlight. Fig. 1 is a schematic structural diagram of a conventional quantum dot thin film backlight module, and referring to fig. 1, the backlight module includes a driving circuit board 11, a plurality of light sources 12 disposed on the driving circuit board 11, and a quantum dot thin film 13 located on a light emitting side of the light sources 12, a white oil layer 14 is further coated on a surface of the driving circuit board 11 in the backlight module, blue light emitted by the light sources 12 enters the quantum dot thin film 13 to be excited to generate red light and green light, a part of the red light and the green light is scattered towards the light sources 12, and the red light and the green light scattered downwards are reflected when passing through the white oil layer 14, that is, the white oil layer 14 reflects the red light and the green light upwards, so that the. In the conventional direct type quantum dot thin film backlight module, each light source 12 can individually address and drive to emit light, and each light source controls the backlight of a certain individual area, so that the backlight module can realize the display of windows with different sizes. However, when a window of different size is displayed by using the local dimming technique, red light and green light scattered downward in the window are reflected by the white oil layer 14 to the unlit area around the window, so that the unlit area shows a certain chromaticity shift. Further, the longer the distance between the quantum dot thin film 13 and the light source 12 is, the more the region around the lighting window is affected by chromaticity shift.
SUMMERY OF THE UTILITY MODEL
The utility model provides a backlight module and liquid crystal display device to when guaranteeing the luminous efficiency who is shaded, reduce the downward scattering light diffusion of quantum dot film to the region that is not lighted.
In a first aspect, an embodiment of the present invention provides a backlight module, including a plurality of light sources, a driving circuit board and a quantum dot film, where the plurality of light sources are arranged on the driving circuit board, and the driving circuit board individually addresses and drives each of the light sources;
the quantum dot film is arranged on the light emitting side of the light source, the light source emits first color light, the quantum dot film converts the first color light into second color light and third color light, and the first color light, the second color light and the third color light can be mixed to form white light;
the backlight module further includes a spectral dichroic film between the quantum dot film and the light source, the spectral dichroic film reflecting the second color light and the third color light and transmitting the first color light according to a film interference principle.
Further, the film thickness d and the refractive index n of the spectral dichroic film1Simultaneously satisfies the following relational expression:
wherein λ is1，λ2，λ3Wavelengths, n, of the first, second and third color light, respectively0Is the refractive index of the spectral dichroic film towards the film layer of the quantum dot thin film, n2Is the refractive index of the spectral dichroic film towards the film layer of the light source, i is the angle of incidence of the incident light ray.
Further, the thickness of the spectral dichroic film is less than 100 μm.
Furthermore, the backlight module also comprises a supporting substrate, the supporting substrate is positioned on one side of the quantum dot film facing the light source, and the spectrum dichroic film is attached to the surface of one side of the supporting substrate facing to or departing from the quantum dot film.
Further, the spectral dichroic film is attached to one side surface, facing the light source, of the quantum dot thin film layer;
or, the backlight module further comprises a diffusion plate and a composite prism, and the diffusion plate and the composite prism are sequentially arranged between the plurality of light sources and the spectrum dichroic film along the light emitting direction of the light sources; the spectral dichroic film is positioned on one side surface of the diffusion plate, which faces the quantum dot thin film.
Furthermore, the backlight module also comprises a nano fluorescent powder layer, wherein the nano fluorescent powder layer is positioned on the light emitting side of the quantum dot film; the emission spectrum of the nano fluorescent powder layer comprises a first color waveband, a second color waveband and a third color waveband, and the half-peak widths of the first color waveband, the second color waveband and the third color waveband are smaller than the half-peak widths of the quantum dot film emergent light rays in the first color waveband, the second color waveband and the third color waveband;
the nano fluorescent powder layer absorbs emergent light of the quantum dot film and emits light of the first color waveband, the second color waveband and the third color waveband.
Further, the nano-phosphor layer includes at least one of nano-semiconductor luminescent material phosphor, rare earth ion and transition metal ion doped nano-oxide phosphor, sulfide phosphor, and composite oxide phosphor.
Furthermore, the size of the nano fluorescent powder particles in the nano fluorescent powder layer is 1-100 nm.
Further, the light source is an LED, a mini-LED or a micro-LED.
In a second aspect, an embodiment of the present invention further provides a liquid crystal display device, including the backlight module according to any one of the first aspect.
The embodiment of the utility model provides a backlight module and liquid crystal display device, through setting up a plurality of light sources, drive circuit board and quantum dot film, wherein, a plurality of light source arrays arrange in on the drive circuit board, drive circuit board addresses each light source separately; the quantum dot film is arranged on the light emitting side of the light source, the light source emits first color light, the quantum dot film converts the first color light into second color light and third color light, and the first color light, the second color light and the third color light can be mixed to form white light; and the backlight module also comprises a spectrum dichroic film, the spectrum dichroic film is positioned between the quantum dot film and the light source, and the spectrum dichroic film reflects the second color light and the third color light and transmits the first color light according to the film interference principle, so that the spectrum dichroic film can transmit the first color light emitted by the light source, and the second color light and the third color light converted by the quantum dot film are mixed to form white light, thereby realizing the emission of white backlight. Meanwhile, the spectral dichroic film may directly reflect the second and third color lights scattered downward by the quantum dot thin film upward, so that the second and third color lights have reduced lateral diffusion. The embodiment of the utility model provides a backlight unit when guaranteeing the luminous efficiency that is shaded, has reduced the downward scattering light diffusion of quantum dot film to the region that is not lighted, has solved the problem that the regional colour shift of not lighting that leads to when setting up the white oil reservoir reflection among the current backlight unit for it possesses obvious bright dark contrast to light the window edge, guarantees the display effect that display device local dimming shows not unidimensional window.
Drawings
Fig. 1 is a schematic structural diagram of a conventional quantum dot thin film backlight module;
fig. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an optical path of a spectral dichroic film provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
FIG. 7 is a graph of the spectrum of a blue LED light source emitted through a quantum dot film;
fig. 8 is a schematic structural diagram of another backlight module according to an embodiment of the present invention;
fig. 9 is a graph of an emission spectrum of a novel nano phosphor provided by an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a liquid crystal display device according to an embodiment of the present invention.
The LED light source comprises a driving circuit board 11, a light source 12, a quantum dot film 13, a white oil layer 14, a spectral dichroic film 15, a supporting substrate 150, a diffusion plate 16, a composite prism 17 and a nanometer fluorescent powder layer 18.
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. 2 is a schematic structural diagram of a backlight module according to an embodiment of the present invention, referring to fig. 2, the backlight module includes a plurality of light sources 12, a driving circuit board 11 and a quantum dot film 13, the plurality of light sources 12 are arranged on the driving circuit board 11 in an array, and the driving circuit board 11 individually addresses and drives each light source 12; the quantum dot film 13 is arranged on the light emitting side of the light source 12, the light source 12 emits a first color light, the quantum dot film 13 converts the first color light into a second color light and a third color light, and the first color light, the second color light and the third color light can be mixed to form white light; the backlight module further includes a spectral dichroic film 15, the spectral dichroic film 15 is located between the quantum dot thin film 13 and the light source 12, and the spectral dichroic film 15 reflects the second color light and the third color light and transmits the first color light according to a principle of thin film interference.
Two kinds of quantum dot particles are distributed in the quantum dot thin film 13, wherein one kind of quantum dot can convert the first color light emitted from the light source 12 into the second color light, and the other kind of quantum dot can convert the first color light emitted from the light source 12 into the third color light. At this time, the first color light emitted by the light source 12 and not converted and the second color light and the third color light emitted by the quantum dot film 13 after conversion can be mixed to form white light, thereby implementing a direct type backlight module. Spectral dichroic film 15, which is arranged according to the principle of spectral interference, has the property of transmitting light of a set wavelength band and reflecting light of another set wavelength band, and specifically, by appropriately selecting the material of spectral dichroic film 15 and setting the thickness of spectral dichroic film 15, spectral dichroic film 15 can be made to transmit the first color light and reflect the second color light and the third color light. Therefore, when the converted part of the second color light and the third color light of the quantum dot film 13 is scattered toward the light source 12, the spectral dichroic film 15 disposed between the quantum dot film 13 and the light source 12 can reflect the second color light and the third color light to the quantum dot film 13 and emit the second color light and the third color light, and at this time, the maximization of the backlight light can be ensured. Also, the first color light emitted by light source 12 is still transmitted through spectral dichroic film 15 so as not to interfere with the emission of light from light source 12. It should be noted that the first color light, the second color light, and the third color light may be blue light, red light, and green light, respectively.
Obviously, the spectral dichroic film 15 is disposed between the quantum dot film 13 and the light source 12, and compared with the white oil layer 14 disposed on the driving circuit board 11, the spectral dichroic film 15 can directly reflect the second color light and the third color light scattered towards the light source 12, so that the distance that the second color light and the third color light longitudinally travel downwards is shortened, and the distance that the second color light and the third color light transversely travel is reduced, so that the light of the lighted window is reduced from spreading to the periphery, and the chromaticity shift of the peripheral area of the lighted window can be improved to some extent.
The embodiment of the utility model provides a backlight module, through setting up a plurality of light sources, drive circuit board and quantum dot film, wherein, a plurality of light source arrays arrange on drive circuit board, drive circuit board addresses each light source separately; the quantum dot film is arranged on the light emitting side of the light source, the light source emits first color light, the quantum dot film converts the first color light into second color light and third color light, and the first color light, the second color light and the third color light can be mixed to form white light; the backlight module further comprises a spectrum dichroic film, the spectrum dichroic film is located between the quantum dot film and the light source, the spectrum dichroic film reflects the second color light and the third color light according to a film interference principle and transmits the first color light, the spectrum dichroic film can transmit the first color light emitted by the light source, the second color light and the third color light converted by the quantum dot film are mixed to form white light, and therefore the emission of white backlight is achieved. Meanwhile, the spectral dichroic film may directly reflect the second and third color lights scattered downward by the quantum dot thin film upward, so that the second and third color lights have reduced lateral diffusion. The embodiment of the utility model provides a backlight unit when guaranteeing the luminous efficiency that is shaded, has reduced the downward scattering light diffusion of quantum dot film to the region that is not lighted, has solved the problem that the regional colour shift of not lighting that leads to when setting up the white oil reservoir reflection among the current backlight unit for it possesses obvious bright dark contrast to light the window edge, guarantees the display effect that display device local dimming shows not unidimensional window.
It should be noted that, in the above embodiments, the light source disposed on the backlight module driving circuit board may be an LED, a mini-LED, or a micro-LED. Also, in order to adapt existing processes and implement local dimming techniques, a mini-LED is preferably employed by those skilled in the art.
With continued reference to fig. 2, a diffuser 16 and a compound prism 17 are further disposed in the backlight module, wherein the diffuser 16 and the compound prism 17 are sequentially disposed between the plurality of light sources 12 and the spectral dichroic film 15 along the light emitting direction of the light sources 12. The composite prism 17 is used for collecting the light emitted from the light source 12, and appropriately reducing the light emitting angle of the light source 12 and ensuring that the display device has a wider viewing angle range. Illustratively, the composite prism 17 may be composed of an upper prism sheet and a lower prism sheet, the surfaces of which are respectively provided with a plurality of strip-shaped protrusions arranged in sequence, and the extending directions of the strip-shaped protrusions of the upper prism sheet and the lower prism sheet are perpendicular to each other. Of course, those skilled in the art can also reasonably set the specific structures of the upper prism sheet and the lower prism sheet according to the actual light-gathering effect of the composite prism, and this is only for example and is not limited. The diffusion plate 16 is used for homogenizing the emergent light of the composite prism 17, and the backlight is ensured to be a uniform surface light source.
As in the above embodiment, the backlight module utilizes the characteristics of the spectral dichroic film that the spectral dichroic film transmits the first color light and reflects the second color light and the third color light by disposing the spectral dichroic film between the light source and the driving circuit board, so as to satisfy the emission of the light source, and simultaneously reduce the diffusion of the second color light and the third color light in the lateral direction. When the spectral dichroic film is arranged and prepared, the design needs to be carried out by utilizing the thin film interference principle. Specifically, the thickness of the spectral dichroic film needs to be set according to the wavelength of the target transmitted light beam and the wavelength of the target reflected light beam, and the refractive index of the spectral dichroic film. Fig. 3 is a schematic optical path diagram of the spectral dichroic film provided by the embodiment of the present invention, referring to fig. 3, the optical path difference of the reflected light of the light on the upper and lower surfaces of the spectral dichroic film
When the thickness of the spectral dichroic film is designed, it is required to ensure that the reflected light of the first color light emitted by the light source on the upper and lower surfaces of the spectral dichroic film is coherently cancelled, that is, the optical path difference is an integer times the wavelength plus a half-wavelength, and the reflected light of the second color light and the third color light scattered downwards by the quantum dot film on the upper and lower surfaces of the spectral dichroic film are coherently lengthened, that is, the optical path difference is an integer multiple of the wavelength. Note that, since half-wave loss occurs when light is reflected at the interface between the optically thinner medium and the optically denser medium, the optical path difference itself has a difference of half a wavelength when reflected on the upper and lower surfaces of the spectral dichroic film.
When the coherence is cancelled, the actual optical path difference satisfies:
when the coherent phase is long, the actual optical path difference meets the following conditions:
from this, the film thickness d and refractive index n of the spectral dichroic film were found1The following relations should be satisfied simultaneously:
wherein λ is1，λ2，λ3Wavelengths of the first, second and third color light, n0Refractive index of the spectral dichroic film towards the film layer of the quantum dot film, n2The refractive index of the film layer of the spectral dichroic film towards the light source, i is the angle of incidence of the incident light.
In order to guarantee that backlight unit possesses thinner thickness, the embodiment of the utility model provides an in backlight unit not only got rid of the setting of white oil reservoir, certain restriction is also carried out to the thickness of the spectrum dichroic film that increases moreover. Alternatively, the thickness of the spectral dichroic film may be set to be less than 100 μm. At this time, the thickness of the spectral dichroic film is thinner than that of the white oil layer, so that the thickness of the whole backlight module is not greatly influenced.
In the above embodiment, when selecting the material of the spectral dichroic film, it is necessary to ensure a high light transmittance and also to take into account the refractive index. Alternatively, the spectral dichroic film may be generally made of a material such as a resin, for example, an acrylic resin.
Fig. 4 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, referring to fig. 4, optionally, the backlight module further includes a supporting substrate 150, the supporting substrate 150 is located on one side of the quantum dot thin film 13 facing the light source 12, and the spectral dichroic film 15 is attached to one side surface of the supporting substrate 150 facing or deviating from the quantum dot thin film 13.
In the backlight module provided in the above embodiment, since the spectral dichroic layer 15 itself is thin and the thickness is usually less than 100 μm, non-uniformity such as warpage is likely to occur. By disposing the spectral dichroic film 15 on the support substrate 150, unevenness of backlight caused by warping of the spectral dichroic film 15 can be avoided while facilitating the preparation. The supporting substrate 150 may be made of a transparent plastic material, such as PET.
Further preferably, in order to prevent the spectral dichroic film from warping, to realize support during the preparation process, and to ensure that the thickness of the backlight module is not increased, the spectral dichroic film may be disposed on the surface of the rigid component of the backlight module. Fig. 5 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, referring to fig. 5, optionally, the spectral dichroic film 15 may be further disposed on a side surface of the diffuser plate 16 facing the quantum dot film 13.
Fig. 6 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, and referring to fig. 6, it is further preferable that the spectral dichroic film 15 is attached to a side surface of the quantum dot thin film 13 facing the light source 12. Specifically, in the preparation process, the spectral dichroic film 15 needs to be formed on the back surface of the quantum dot film 13, and then the quantum dot film 13 attached with the spectral dichroic film 15 needs to be assembled to form the backlight module.
It should be noted that the function of the spectral dichroic film 15 is to directly reflect the second color light and the third color light scattered downward by the quantum dot film 13, and to avoid excessive lateral diffusion of the second color light and the third color light, therefore, it is preferable to directly attach the spectral dichroic film 15 to the quantum dot film 13, and at this time, the optical path of the second color light and the third color light is short, and the lateral diffusion capability is low, so that it is ensured that the backlight of the display device lighting window is not diffused to the unlit area.
Fig. 7 is a spectrum curve diagram of a blue light LED light source emitted through a quantum dot film, referring to fig. 7, most of light sources adopted in the existing backlight module are blue light LED light sources, when the quantum dot film converts blue light into red light and green light, the red light and the green light wave bands have the problem of wider half-peak width, namely, in the backlight of the existing backlight module, the half-peak width of red, green and blue light wave bands is wider, the color purity of the red, green and blue light is lower, and the color mixing is serious.
To this end, the embodiment of the present invention further provides a backlight module. Fig. 8 is a schematic structural diagram of another backlight module according to an embodiment of the present invention, referring to fig. 8, the backlight module further includes a nano phosphor layer 18, and the nano phosphor layer 18 is located on the light emitting side of the quantum dot film 13; the emission spectrum of the nano fluorescent powder layer 18 comprises a first color waveband, a second color waveband and a third color waveband, and the half-peak widths of the first color waveband, the second color waveband and the third color waveband are smaller than the half-peak widths of the emergent light of the quantum dot film 13 in the first color waveband, the second color waveband and the third color waveband; the nano phosphor layer 18 absorbs the outgoing light of the quantum dot film 13 and emits light of the first, second, and third color bands.
The nano-phosphor particles in the nano-phosphor layer 18 can generate light of another waveband under the excitation of light of a certain waveband, and the half-peak width of the peak in the nano-phosphor emission spectrum can be adjusted and controlled by reasonably designing the nano-phosphor material and the particle size. Specifically, the nano phosphor layer 18 may include at least one of nano semiconductor luminescent material phosphor, rare earth ion and transition metal ion doped nano oxide phosphor, sulfide phosphor, and composite oxide phosphor. Fig. 9 is an emission spectrum of a novel nano-phosphor provided by an embodiment of the present invention, referring to fig. 9, the emission spectrum of the nano-phosphor not only has a narrow peak at a blue light, but also has obvious peaks at 535nm (green light) and 630nm (red light). That is, the novel nano phosphor layer 18 absorbs the white light (including red light, green light and blue light) emitted from the quantum dot film 13, and emits a peak that generates narrower red light and green light, and there is no overlapping area between them, so that it can ensure the red light and green light with higher emission purity, thereby realizing the expansion of the backlight color gamut. Preferably, when the nano-phosphor layer is arranged, the nano-phosphor particles can be set to be 1-100nm, so that the excitation radiation of the nano-phosphor can be better performed when the quantum dot film emits white light, and the effective utilization of backlight is realized.
Based on the same utility model concept, the embodiment of the utility model provides a still provide a liquid crystal display device, fig. 10 is the embodiment of the utility model provides a liquid crystal display device's schematic structure diagram. Referring to fig. 10, the liquid crystal display device includes any one of the backlight modules 100 provided in the above embodiments. Because the liquid crystal display device adopts the backlight module in the embodiment, the liquid crystal display device has the same beneficial effects as the backlight module. The liquid crystal display device can be a mobile phone, a computer, an intelligent wearable device and the like.
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 described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art 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 (10)
1. A backlight module comprises multiple light sources, a driving circuit board and a quantum dot film,
the plurality of light source arrays are arranged on the driving circuit board, and the driving circuit board is used for individually addressing and driving each light source;
the quantum dot film is arranged on the light emitting side of the light source, the light source emits first color light, the quantum dot film converts the first color light into second color light and third color light, and the first color light, the second color light and the third color light can be mixed to form white light;
the backlight module further includes a spectral dichroic film between the quantum dot film and the light source, the spectral dichroic film reflecting the second color light and the third color light and transmitting the first color light according to a film interference principle.
2. A backlight module according to claim 1, wherein the spectral dichroic film has a film thickness d and a refractive index n1Simultaneously satisfies the following relational expression:
wherein λ is1，λ2，λ3Wavelengths, n, of the first, second and third color light, respectively0Is the refractive index of the spectral dichroic film towards the film layer of the quantum dot thin film, n2Is the refractive index of the spectral dichroic film towards the film layer of the light source, i is the angle of incidence of the incident light ray.
3. A backlight module according to claim 1, wherein the spectral dichroic film has a thickness of less than 100 μm.
4. The backlight module according to claim 1, further comprising a support substrate disposed on a side of the quantum dot film facing the light source, wherein the spectral dichroic film is attached to a surface of the support substrate facing toward or away from the side of the quantum dot film.
5. The backlight module as recited in claim 1, wherein the spectral dichroic film is attached to a surface of the quantum dot thin film layer facing the light source;
or, the backlight module further comprises a diffusion plate and a composite prism, and the diffusion plate and the composite prism are sequentially arranged between the plurality of light sources and the spectrum dichroic film along the light emitting direction of the light sources; the spectral dichroic film is positioned on one side surface of the diffusion plate, which faces the quantum dot thin film.
6. The backlight module of claim 1, further comprising a nano-phosphor layer on a light-emitting side of the quantum dot film; the emission spectrum of the nano fluorescent powder layer comprises a first color waveband, a second color waveband and a third color waveband, and the half-peak widths of the first color waveband, the second color waveband and the third color waveband are smaller than the half-peak widths of the quantum dot film emergent light rays in the first color waveband, the second color waveband and the third color waveband;
the nano fluorescent powder layer absorbs emergent light of the quantum dot film and emits light of the first color waveband, the second color waveband and the third color waveband.
7. The backlight module according to claim 6, wherein the nano phosphor layer comprises at least one of nano semiconductor phosphor, rare earth ion and transition metal ion doped nano oxide phosphor, sulfide phosphor and composite oxide phosphor.
8. The backlight module as claimed in claim 6, wherein the nano phosphor particles in the nano phosphor layer have a size of 1-100 nm.
9. The backlight module according to claim 1, wherein the light source is an LED, a mini-LED or a micro-LED.
10. A liquid crystal display device comprising the backlight module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921936346.7U CN210605291U (en) | 2019-11-11 | 2019-11-11 | Backlight module and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921936346.7U CN210605291U (en) | 2019-11-11 | 2019-11-11 | Backlight module and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210605291U true CN210605291U (en) | 2020-05-22 |
Family
ID=70695761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921936346.7U Active CN210605291U (en) | 2019-11-11 | 2019-11-11 | Backlight module and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210605291U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929948A (en) * | 2020-08-13 | 2020-11-13 | Oppo（重庆）智能科技有限公司 | Backlight module, liquid crystal display panel and electronic device |
| CN112415808A (en) * | 2020-11-11 | 2021-02-26 | 福州大学 | Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source |
| CN112684633A (en) * | 2020-12-28 | 2021-04-20 | 深圳市康冠商用科技有限公司 | Composite diffusion plate and display device |
| CN114002882A (en) * | 2021-11-26 | 2022-02-01 | 杭州英诺维科技有限公司 | Mini LED backlight module structure |
| WO2023207329A1 (en) * | 2022-04-24 | 2023-11-02 | 京东方科技集团股份有限公司 | Optical module and tiled display device |
-
2019
- 2019-11-11 CN CN201921936346.7U patent/CN210605291U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929948A (en) * | 2020-08-13 | 2020-11-13 | Oppo（重庆）智能科技有限公司 | Backlight module, liquid crystal display panel and electronic device |
| CN112415808A (en) * | 2020-11-11 | 2021-02-26 | 福州大学 | Two-dimensional regional light-dimming light guide plate with embedded Mini-LED light source |
| CN112684633A (en) * | 2020-12-28 | 2021-04-20 | 深圳市康冠商用科技有限公司 | Composite diffusion plate and display device |
| CN114002882A (en) * | 2021-11-26 | 2022-02-01 | 杭州英诺维科技有限公司 | Mini LED backlight module structure |
| WO2023207329A1 (en) * | 2022-04-24 | 2023-11-02 | 京东方科技集团股份有限公司 | Optical module and tiled display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210605291U (en) | Backlight module and liquid crystal display device | |
| JP6554593B2 (en) | Lighting device, display device, and television receiver | |
| JP6532179B2 (en) | Lighting device, display device, and television receiver | |
| EP2082160B1 (en) | Thin illumination device, display device and luminary device | |
| CN101539270B (en) | Method for converting light wavelength with emission angle selectivity characteristic | |
| US20100067214A1 (en) | Illumination system and display device | |
| JP6422636B2 (en) | Light source device | |
| CN107407834B (en) | Illumination device, display device, and television receiver | |
| EP3287689A1 (en) | Lighting device, display device, and television reception device | |
| US20090147513A1 (en) | Backlighting led power devices | |
| US9618681B2 (en) | Quantum dot backlight module and display device | |
| KR20060108244A (en) | Lighting apparatus, display apparatus, and fluorescent substance film | |
| US11500244B2 (en) | Backlight unit using mini LED or micro LED as light source | |
| CN106773322B (en) | Backlight module and double-sided liquid crystal display | |
| US10707390B1 (en) | Area light source display module | |
| JP2016194996A (en) | Backlight device and display device | |
| CN110673391A (en) | Backlight module | |
| JP2008108523A (en) | Lighting system, and display device equipped with it | |
| KR20120127077A (en) | Color converting device and method for manufacturing the same | |
| JP3409666B2 (en) | Surface light emitting device and display device using the same | |
| CN111308778A (en) | Backlight unit and display device including the same | |
| CN111665662B (en) | Lighting device and display device | |
| KR20170033972A (en) | Light-Emitting Apparatus and Backlight Unit having the same | |
| US20220352416A1 (en) | High color gamut photoluminescence wavelength converted white light emitting devices | |
| CN110553160A (en) | Luminous efficiency enhancing method, luminous module and display device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |