CN110703496A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN110703496A CN110703496A CN201910878964.9A CN201910878964A CN110703496A CN 110703496 A CN110703496 A CN 110703496A CN 201910878964 A CN201910878964 A CN 201910878964A CN 110703496 A CN110703496 A CN 110703496A
- Authority
- CN
- China
- Prior art keywords
- backlight module
- light
- camera
- auxiliary
- light source
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention provides a backlight module, which comprises a main backlight module and an auxiliary backlight module, wherein the main backlight module forms a first through hole in a region corresponding to a camera, the auxiliary backlight module is arranged in the first through hole, the auxiliary backlight module forms a second through hole in a position corresponding to the camera, and a light outlet circuit of the auxiliary backlight module covers a light inlet region of the camera; the auxiliary backlight module is added in the area corresponding to the camera, and the light outlet circuit of the auxiliary backlight module covers the light inlet area of the camera, so that the auxiliary backlight module emits light in the area corresponding to the camera, and the problem that the existing display screen cannot display in a full screen mode is solved.
Description
Technical Field
The invention relates to the field of display, in particular to a backlight module.
Background
With the continuous development and advancement of display technology, the full-screen technology has become the mainstream technology in the mobile phone market.
However, in the prior art, a part of the area needs to be dug or shaped, and the position area of the camera needs to be exposed for photographing, so that real full-screen display cannot be achieved.
Therefore, the problem that the existing display screen cannot display in a full screen mode needs to be solved.
Disclosure of Invention
The invention provides a backlight module, which is used for solving the problem that the existing display screen cannot display in a full screen mode.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the invention provides a backlight module, which comprises a main backlight module and an auxiliary backlight module, wherein the main backlight module forms a first through hole in a region corresponding to a camera, the auxiliary backlight module is arranged in the first through hole, the auxiliary backlight module forms a second through hole in a position corresponding to the camera, and a light outlet circuit of the auxiliary backlight module covers a light inlet region of the camera.
In the backlight module provided by the invention, the main backlight module comprises a main light source, a reflector plate, a main color conversion film, a main diffusion sheet and a main prism sheet; the auxiliary backlight module comprises an auxiliary light source component and a light guide ring positioned in the light-emitting direction of the auxiliary light source component.
In the backlight module provided by the invention, the structure of the light guide ring is a hollow ring-column structure.
In the backlight module provided by the invention, the diameter of the inner ring of the ring columnar structure increases progressively in the light-emitting direction of the secondary light source assembly.
In the backlight module provided by the invention, the inner ring at the bottom of the annular columnar structure corresponds to the position of the camera, and the inner ring at the top corresponds to the light incident area of the camera.
In the backlight module provided by the invention, the outer side wall of the light guide ring is sputtered with a band-pass filtering diaphragm, and the band-pass filtering diaphragm is used for reflecting the light emitted by the main light source and the light emitted by the secondary light source component.
In the backlight module provided by the invention, the light emitted by the main light source is blue light, and the light emitted by the secondary light source component is also blue light.
In the backlight module provided by the invention, the inner side wall of the light guide ring is coated with a secondary color conversion film layer, and the secondary color conversion film layer is used for converting light emitted by the secondary light source component into white light.
In the backlight module provided by the invention, the secondary color conversion film layer is a fluorescent film or a quantum dot film.
In the backlight module provided by the invention, the surface of the secondary color conversion film layer is provided with a micro-lens structure.
The invention has the beneficial effects that: the invention provides a backlight module, which comprises a main backlight module and an auxiliary backlight module, wherein the main backlight module forms a first through hole in a region corresponding to a camera, the auxiliary backlight module is arranged in the first through hole, the auxiliary backlight module forms a second through hole in a position corresponding to the camera, and a light outlet circuit of the auxiliary backlight module covers a light inlet region of the camera; the auxiliary backlight module is additionally arranged in the area corresponding to the camera, the auxiliary backlight module utilizes the light guide ring and the color conversion film layer arranged on the inner side wall of the light guide ring to realize uniform light emitting of the area of the camera, and the light emitting circuit of the auxiliary backlight module covers the light inlet area of the camera, so that the auxiliary backlight module can emit light in the area corresponding to the camera, full-screen display of the liquid crystal display module is realized, and the problem that the existing display screen cannot display the full screen is solved; the outer side wall of the light guide ring is sputtered with the band-pass filtering diaphragm, the band-pass filtering diaphragm reflects blue light emitted by the main backlight module and the auxiliary backlight module, the optical crosstalk problem of the main backlight module and the auxiliary backlight module is improved, interference of incident light of the camera passing through the auxiliary backlight module through hole is avoided, and the lighting effect of the camera is improved.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic top view of a backlight module according to an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of the backlight module along AA' according to the embodiment of the invention.
Fig. 3 is a partially enlarged schematic view of a backlight module according to an embodiment of the invention.
Fig. 4 is a light transmittance spectrum of the bandpass filter film provided in the embodiment of the invention.
Fig. 5 is a schematic structural diagram of a liquid crystal display module according to an embodiment of the invention.
Detailed Description
While the embodiments and/or examples of the present invention will be described in detail and fully with reference to the specific embodiments thereof, it should be understood that the embodiments and/or examples described below are only a part of the embodiments and/or examples of the present invention and are not intended to limit the scope of the invention. All other embodiments and/or examples, which can be obtained by a person skilled in the art without making any inventive step, based on the embodiments and/or examples of the present invention, belong to the scope of protection of the present invention.
Directional terms used in the present invention, such as [ upper ], [ lower ], [ left ], [ right ], [ front ], [ rear ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terminology is used for the purpose of describing and understanding the invention and is in no way limiting. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
Aiming at the problem that the existing display screen cannot display in a full screen mode, the invention provides the backlight module and the liquid crystal display module which can relieve the problem.
In one embodiment, as shown in fig. 1, the backlight module 100 of the present invention includes: the main backlight module 110 forms a first through hole 101 in a region corresponding to the camera, the sub backlight module 120 is arranged in the first through hole 101, the sub backlight module 120 forms a second through hole 102 in a position corresponding to the camera, and a light outlet circuit of the sub backlight module 120 covers a light inlet region of the camera.
The embodiment of the invention provides a backlight module, which is characterized in that an auxiliary backlight module is added in an area corresponding to a camera, and a light emitting circuit of the auxiliary backlight module covers a light entering area of the camera, so that the auxiliary backlight module emits light in the area corresponding to the camera, and the problem that the existing display screen cannot display in a full screen mode is solved.
In one embodiment, as shown in fig. 1, the main backlight module 110 includes: a main light source 111, a reflection sheet 112, a diffusion plate 113, a main color conversion film 114, a main diffusion sheet 115, and a main prism sheet 116.
The main light source 111 is a light emitting source of the main backlight module, and a light source in the backlight module includes an LED (light emitting Diode) and a CCFL (Cold Cathode Fluorescent Lamp). The main light source in the embodiment of the present invention is an LED emitting blue light, and the backlight module is implemented to emit white light by matching with the main color conversion film 114.
The main function of the reflector 112 is to reflect the leaked light back from the diffuser 113 to improve the utilization of the light. The material constituting the reflective sheet is generally a PET (polyethylene terephthalate) film on which a layer of high-reflectivity metal film is plated, or a combination of upper and lower PET films including a core layer (polymer resin having high reflectivity), the core layer reflecting light, and the PET layer protecting the core layer and supporting the entire film.
The diffusion plate 113 is mainly used to convert a point light source or a line light source array into a surface light source, so that incident light is sufficiently scattered, and a good shielding effect is provided for a lamp shadow, thereby realizing a softer and more uniform light source. The diffuser plate requires a certain rigidity to support the other optical films, so it is thicker than the other optical films. In order to achieve good light diffusion, inorganic or organic light-dispersing particles are usually added to the base material PMMA (polymethyl methacrylate), PC (polycarbonate), PS (polyphenylene), PP (polypropylene) of the diffusion plate, or the microstructure surface-treated by the base material causes incident light to be refracted, reflected, and scattered in different directions, thereby changing the traveling path of the light and achieving a sufficient diffusion effect of the incident light.
The primary color conversion film 114 is used to convert the blue light emitted by the primary light source 111 into white light. The color conversion film generally includes a resin-based film layer, and coating layers disposed on upper and lower surfaces of the resin-based film layer, the coating layers containing a fluorescent conversion material for emitting light of the corresponding pixels.
The primary diffuser 115, including a lower diffuser 1151 and an upper diffuser 1152, primarily serves to shield the diffuser microstructures, enhance the brightness of the exiting light, improve brightness uniformity, and improve the viewing angle. The base material of the diffusion sheet is generally PET, but also PC, and the thickness is generally about 100 um. The upper surface of the diffusion sheet is generally coated with a resin layer containing diffusion particles having different sizes, and the lower surface is an antistatic layer for preventing close adhesion between the sheets or a protective layer for preventing scratches between the sheets.
The main function of the main prism sheet 116 is to collect light incident from the diffuser sheet and improve the front brightness. The prism sheet is a film having a microprism structure formed by covering the surface of a PET substrate with a UV curable resin material (1.54-1.59). The brightness enhancement principle is to condense the divergent light with large visual angle, which is emitted by the diffusion sheet, into a smaller angular range to be emitted, so as to increase the brightness of the positive visual angle.
The main backlight module according to the embodiment of the present invention may be a direct type backlight module as described in the above embodiments, or may be a side type backlight module, which is not limited herein.
In the main backlight module 110 according to the embodiment of the present invention, blue light emitted from the main light source 111 is uniformly softened by the diffusion plate 113, and then converted into a surface light source, and enters the main color conversion film 114, and the main color conversion film 114 converts the blue light into white light to be emitted, and then the white light emitting effect of the main backlight module 110 is realized through the diffusion effect of the main diffusion sheet 115 and the convergence effect of the main prism sheet 116.
In one embodiment, as shown in fig. 2, the sub-backlight module 120 is a direct-type backlight module, the sub-backlight module 120 includes a sub-light source assembly 121 and a light guide ring 122 located in a light-emitting direction of the sub-light source assembly, a sub-color conversion film 123 is coated on an inner sidewall of the light guide ring 122, and a band-pass filter film 124 is sputtered on an outer sidewall of the light guide ring.
In one embodiment, the light guide ring 122 is used for guiding the direction of the light, that is, guiding the light emitted from the sub-light source assembly 121, and converting the vertical light entering the light guide ring 122 into light with a certain angle to exit, so as to cover the light entering area of the camera. The light guide ring 122 is generally made of an optical grade resin material, and commonly used is PMMA (Poly methyl acrylate), thermoplastic resin, and PC (Polycarbonate).
The light guiding function of the light guiding ring mainly utilizes the refraction and total reflection laws of light. The bottom of the light guide ring close to the reflector plate is printed with mesh points, the mesh points destroy the total reflection of light, when the light enters mesh point patterns with different densities and sizes distributed on the bottom surface of the light guide plate, the reflected light can be scattered towards all directions, so that the total reflection condition in the light guide plate is destroyed, and the light is emitted from the front surface of the light guide plate; the light which is transmitted out of the light guide ring and faces the direction of the reflector plate is reflected back to the light guide ring by the reflector plate to be recycled. The size, shape, density, etc. of the dot pattern will affect the lightness and scattering angle of the emerging light. The arrangement may be arranged as the case may be, and will not be described in detail here.
In one embodiment, the light guiding ring 122 is similar to a ring column, the diameter of an inner ring of the ring column increases progressively in the light emitting direction of the secondary light source assembly 121, the inner ring at the bottom corresponds to the position of the camera, and the inner ring at the top corresponds to the light incident region of the camera; the diameter of the inner circular ring can be increased linearly or in other ways, and can be set as required. The outer ring of the ring column is close to the inner wall of the first through hole.
In one embodiment, as shown in fig. 2, in a cross section perpendicular to the sub-light source assembly 121, the inner side wall of the light guide ring 122 is in two sides of an inverted trapezoid, that is, the diameter of the inner ring of the light guide ring increases linearly in the light emitting direction of the sub-light source assembly 121; the outer side wall of the light guide ring 122 is rectangular and has two opposite sides.
In one embodiment, as shown in fig. 3, the light source assembly 121 includes a substrate 1211, a mini-LED lamp 1212, a sealing glue 1213, a secondary diffusion sheet 1214, and a secondary prism sheet 1215. The mini-LED lamp 1212 is mounted on the substrate 1211, and the encapsulation adhesive 1213 is made of one or more materials of an anti-vulcanizing agent, silicon rubber, and silicone resin. The secondary diffusion sheet 1214 has a similar function to the primary diffusion sheet 115 in the previous embodiments, and the secondary prism sheet 1215 has a similar function to the primary prism sheet 116 in the previous embodiments.
In one embodiment, the mini-LED lamp emits blue light. The secondary color conversion film layer 123 functions in the same manner as the primary color conversion film 113, and converts light emitted from the light source assembly 121 into white light. Color conversion films generally include a transparent substrate including glass, a high molecular weight polymeric material, and a color conversion material, typically a polymer, coated on or formed within the substrate, that absorbs and converts short wavelength light to long wavelength light. The polymer comprises a first unit and a second unit, wherein the first unit absorbs incident light, the second unit emits emergent light, the first unit has a specific wavelength absorption coefficient, can absorb light absorbed on a color conversion film and transmits the energy of the absorbed incident light to the second unit, the second unit is excited after receiving the energy from the first unit, electrons in the second unit are transited from a ground state to an excited state, the electrons in the excited state are unstable and need to return to a state with lower energy, so that the energy can be released in the form of photons to generate fluorescence, namely, photoluminescence reaction is generated.
In the photoluminescence reaction, energy is attenuated, so that the wavelength of light emitted by the second unit is longer than that of light absorbed by the first unit, and the conversion of blue light of the mini-LED lamp into red light and green light can be realized. The color conversion material in the secondary color conversion film layer includes a red conversion material for converting blue light into red component light and a green conversion material for converting blue light into green component light.
In order to avoid waste of energy and improve the conversion efficiency of the color conversion film, the absorption spectrum of the first unit of the polymer color conversion material should overlap with the spectrum of the blue light emitted by the mini-LED lamp as much as possible, and preferably the peak value of the absorption spectrum of the first unit overlaps with the peak value of the spectrum of the blue light emitted by the mini-LED lamp; the emission spectrum of the first unit of the polymeric color converting material should overlap the absorption spectrum of the second unit as much as possible, preferably the peak of the emission spectrum of the first unit overlaps the peak of the absorption spectrum of the second unit. The conversion of light of different colors can be achieved by using polymers with different first and second units, so that the arrangement of the color conversion film can be carried out according to actual specific needs.
In one embodiment, the secondary color conversion film layer 123 may be a fluorescent type secondary color conversion film layer, or may be a quantum dot type secondary color conversion film layer.
In an embodiment, the surface of the secondary color conversion film 123 is further provided with a micro-lens structure, and the densely arranged lens structures have both the light converging effect and the light diffusing effect, so as to simultaneously perform the functions of a diffuser and a prism sheet, improve the brightness and the uniformity of emitted light, and enhance the light emitting effect of the secondary color conversion film.
In the sub backlight module 120 according to the embodiment of the present invention, the sub light source assembly 121 emits vertical blue light to enter the light guide ring 122, the light is guided by the light guide ring 122 and converted into emergent light at other angles, the emergent light is converted into white light by the sub color conversion film 123, uniform light mixing is realized by the micro lens structure on the surface of the sub color conversion film 123, and finally the light exiting the sub backlight module 120 covers the light entering area of the camera.
In an embodiment, as shown in fig. 4, as shown in the transmittance spectrum of the bandpass filtering film 124, the transmittance of the bandpass filtering film provided in the embodiment of the present invention to blue light (with a wavelength range of 400nm to 500nm) is almost 0, so that when the blue light irradiates on the bandpass filtering film, the blue light is totally reflected and totally reflected back, but not absorbed or transmitted, thereby avoiding optical crosstalk between the main backlight module 110 and the sub backlight module 120.
When the sub-backlight module 120 is turned on, the blue light emitted from the light source assembly 121 enters the light guide ring 122 and is totally reflected by the channel filter film layer 124 when reaching the band-pass filter film 124, so as to prevent the light in the sub-backlight module 120 from entering the main backlight module 110 and affecting the main display. When the main backlight module 110 is turned on, the blue light LED of the main light source emits blue light, and the blue light is totally reflected by the channel filtering film layer 124 when irradiating the band-pass filtering film layer 124 plated on the outer side wall of the light guide ring, so that the blue light does not enter the auxiliary backlight module, thereby avoiding the influence on the auxiliary display area; more importantly, when the main backlight module 110 is opened, the auxiliary backlight module 120 is closed, and the camera works, the band-pass filtering diaphragm 124 exists, so that the light of the main backlight module can not enter the auxiliary backlight module, the interference of incident light of the camera passing through the through hole of the auxiliary backlight module is avoided, and the lighting effect of the camera is improved.
Compared with a light absorption treatment mode (light absorption adhesive tape or light absorption ink), the band-pass filtering membrane in the embodiment of the invention can carry out total reflection on light, the reflected light in the main backlight module can be reused through the reflector plate and the diffusion sheet, and the reflected light in the auxiliary backlight module can be reused through the light guide ring, so that the light efficiency can be improved, and the phenomenon that the main backlight module is uneven in brightness at the boundary of the first through hole can be improved; on the other hand, the band-pass filtering membrane provided by the embodiment of the invention only has requirements on the reflectivity of a blue light wave band, and has strong operability and good effect on membrane layer design and processing.
In one embodiment, as shown in fig. 5, an embodiment of the invention provides a liquid crystal display module, which includes a backlight module 100, a liquid crystal display panel 200, a lower polarizer 300, and an upper polarizer 400; the backlight module comprises a main backlight module and an auxiliary backlight module, wherein the main backlight module forms a first through hole in a region corresponding to the camera, the auxiliary backlight module is arranged in the first through hole, the auxiliary backlight module forms a second through hole in a position corresponding to the camera, and a light outlet circuit of the auxiliary backlight module covers a light inlet region of the camera.
The embodiment of the invention provides a liquid crystal display module, which is characterized in that an auxiliary backlight module is added in an area corresponding to a camera, and a light emitting circuit of the auxiliary backlight module covers a light entering area of the camera, so that the auxiliary backlight module emits light in the area corresponding to the camera, full-screen display of the liquid crystal display module is realized, and the problem that the existing display screen cannot display the full screen is solved.
In one embodiment, the main backlight module comprises a main light source, a reflector, a main color conversion film, a main diffuser and a main prism; the auxiliary backlight module comprises an auxiliary light source component and a light guide ring positioned in the light-emitting direction of the auxiliary light source component.
In one embodiment, the light emitted from the primary light source is blue light, and the light emitted from the secondary light source assembly is also blue light.
In one embodiment, a band-pass filter membrane is sputtered on the outer side wall of the light guide ring, and the band-pass filter membrane reflects blue light.
In one embodiment, the inner side wall of the light guide ring is coated with a secondary color conversion film layer, and the secondary color conversion film layer is used for converting blue light into white light.
In one embodiment, the secondary color conversion film layer is a fluorescent film or a quantum dot film.
In one embodiment, the surface of the secondary color conversion film layer is provided with a microlens structure.
In one embodiment, in a cross section perpendicular to the secondary light source assembly, the inner side wall of the light guide ring is in two opposite sides of an inverted trapezoid, and the outer side wall of the light guide ring is in two opposite sides of a rectangle.
In one embodiment, the secondary light source assembly includes a substrate, a mini-LED lamp, an encapsulation adhesive, a secondary diffusion sheet, and a secondary prism sheet.
According to the above embodiments:
the embodiment of the invention provides a backlight module and a liquid crystal display module, wherein the backlight module comprises a main backlight module and an auxiliary backlight module, the main backlight module forms a first through hole in a region corresponding to a camera, the auxiliary backlight module is arranged in the first through hole, the auxiliary backlight module forms a second through hole in a position corresponding to the camera, and a light-emitting circuit of the auxiliary backlight module covers a light-entering region of the camera; the auxiliary backlight module is additionally arranged in the area corresponding to the camera, the auxiliary backlight module utilizes the light guide ring and the color conversion film layer arranged on the inner side wall of the light guide ring to realize uniform light emitting of the area of the camera, and the light emitting circuit of the auxiliary backlight module covers the light inlet area of the camera, so that the auxiliary backlight module can emit light in the area corresponding to the camera, full-screen display of the liquid crystal display module is realized, and the problem that the existing display screen cannot display the full screen is solved; the outer side wall of the light guide ring is sputtered with the band-pass filtering diaphragm, the band-pass filtering diaphragm reflects blue light emitted by the main backlight module and the auxiliary backlight module, the optical crosstalk problem of the main backlight module and the auxiliary backlight module is improved, interference of incident light of the camera passing through the auxiliary backlight module through hole is avoided, and the lighting effect of the camera is improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A backlight module is characterized by comprising a main backlight module and an auxiliary backlight module, wherein a first through hole is formed in a region corresponding to a camera of the main backlight module, the auxiliary backlight module is arranged in the first through hole, a second through hole is formed in a position corresponding to the camera of the auxiliary backlight module, and a light outlet circuit of the auxiliary backlight module covers a light inlet region of the camera.
2. The backlight module of claim 1, wherein the primary backlight module comprises a primary light source, a reflector sheet, a primary color conversion film, a primary diffuser sheet, and a primary prism sheet; the auxiliary backlight module comprises an auxiliary light source component and a light guide ring positioned in the light-emitting direction of the auxiliary light source component.
3. The backlight module as claimed in claim 2, wherein the light guide ring has a hollow cylindrical structure.
4. The backlight module as claimed in claim 3, wherein the diameter of the inner ring of the ring columnar structure increases in the light emitting direction of the sub-light source assembly.
5. The backlight module as claimed in claim 3, wherein the bottom inner ring of the ring-shaped columnar structure corresponds to a position of the camera, and the top inner ring corresponds to a light incident area of the camera.
6. The backlight module of claim 2, wherein a band-pass filter is sputtered on an outer sidewall of the light-guiding ring, and the band-pass filter is used for reflecting the light emitted from the main light source and the light emitted from the sub-light source assembly.
7. The backlight module as claimed in claim 6, wherein the light emitted from the main light source is blue light, and the light emitted from the sub-light source is also blue light.
8. The backlight module as claimed in claim 2, wherein the inner sidewall of the light guide ring is coated with a secondary color conversion film layer for converting light emitted from the secondary light source assembly into white light.
9. The backlight module as claimed in claim 8, wherein the secondary color conversion film layer is a phosphor film or a quantum dot film.
10. The backlight module as claimed in claim 8, wherein the surface of the secondary color conversion film layer is provided with a micro-lens structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878964.9A CN110703496A (en) | 2019-09-18 | 2019-09-18 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910878964.9A CN110703496A (en) | 2019-09-18 | 2019-09-18 | Backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110703496A true CN110703496A (en) | 2020-01-17 |
Family
ID=69195634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910878964.9A Pending CN110703496A (en) | 2019-09-18 | 2019-09-18 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110703496A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111198458A (en) * | 2020-03-02 | 2020-05-26 | 武汉华星光电技术有限公司 | Display device |
| CN111308782A (en) * | 2020-03-18 | 2020-06-19 | Oppo广东移动通信有限公司 | Electronic device |
| CN111624812A (en) * | 2020-05-29 | 2020-09-04 | 厦门天马微电子有限公司 | Display module, manufacturing method thereof and display device |
| CN112859440A (en) * | 2021-01-26 | 2021-05-28 | 惠州Tcl移动通信有限公司 | Method and device for reducing crosstalk of stray light of camera imaging under LCD screen |
| CN114114750A (en) * | 2021-11-04 | 2022-03-01 | 深圳市高展光电有限公司 | Prevent blue light backlight unit and display screen |
| WO2023159693A1 (en) * | 2022-02-25 | 2023-08-31 | 武汉华星光电技术有限公司 | Display module and manufacturing method therefor, and mobile terminal |
| EP4180867A4 (en) * | 2020-07-10 | 2024-08-28 | Wuhan China Star Optoelectronics Technology Co Ltd | Backlight module and display apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768433A (en) * | 2012-08-01 | 2012-11-07 | 友达光电股份有限公司 | Liquid crystal display equipment |
| CN108983499A (en) * | 2018-09-19 | 2018-12-11 | 武汉华星光电技术有限公司 | Backlight module |
| CN110161749A (en) * | 2019-05-10 | 2019-08-23 | 武汉华星光电技术有限公司 | Applied to the panel device for shielding lower camera |
| CN110208976A (en) * | 2019-06-13 | 2019-09-06 | 信利光电股份有限公司 | A kind of full screen display mould group |
-
2019
- 2019-09-18 CN CN201910878964.9A patent/CN110703496A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768433A (en) * | 2012-08-01 | 2012-11-07 | 友达光电股份有限公司 | Liquid crystal display equipment |
| CN108983499A (en) * | 2018-09-19 | 2018-12-11 | 武汉华星光电技术有限公司 | Backlight module |
| CN110161749A (en) * | 2019-05-10 | 2019-08-23 | 武汉华星光电技术有限公司 | Applied to the panel device for shielding lower camera |
| CN110208976A (en) * | 2019-06-13 | 2019-09-06 | 信利光电股份有限公司 | A kind of full screen display mould group |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111198458A (en) * | 2020-03-02 | 2020-05-26 | 武汉华星光电技术有限公司 | Display device |
| US11442308B2 (en) | 2020-03-02 | 2022-09-13 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Display device having through hole section for image acquisition and image display |
| EP4116765A4 (en) * | 2020-03-02 | 2024-04-17 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Display device |
| CN111308782A (en) * | 2020-03-18 | 2020-06-19 | Oppo广东移动通信有限公司 | Electronic device |
| CN111624812A (en) * | 2020-05-29 | 2020-09-04 | 厦门天马微电子有限公司 | Display module, manufacturing method thereof and display device |
| CN111624812B (en) * | 2020-05-29 | 2022-10-18 | 厦门天马微电子有限公司 | Display module, manufacturing method thereof and display device |
| EP4180867A4 (en) * | 2020-07-10 | 2024-08-28 | Wuhan China Star Optoelectronics Technology Co Ltd | Backlight module and display apparatus |
| CN112859440A (en) * | 2021-01-26 | 2021-05-28 | 惠州Tcl移动通信有限公司 | Method and device for reducing crosstalk of stray light of camera imaging under LCD screen |
| CN114114750A (en) * | 2021-11-04 | 2022-03-01 | 深圳市高展光电有限公司 | Prevent blue light backlight unit and display screen |
| CN114114750B (en) * | 2021-11-04 | 2023-12-15 | 深圳市高展光电有限公司 | Blue light prevention backlight module and display screen |
| WO2023159693A1 (en) * | 2022-02-25 | 2023-08-31 | 武汉华星光电技术有限公司 | Display module and manufacturing method therefor, and mobile terminal |
| US12092857B2 (en) | 2022-02-25 | 2024-09-17 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Display module, manufacturing method thereof, and mobile terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110703496A (en) | Backlight module | |
| CN109844625B (en) | Light guide plate, surface light source device, display device, and electronic apparatus | |
| KR101597335B1 (en) | Backlight assembly using flexible light guiding film and liquid crystal display module using the same | |
| KR101229874B1 (en) | Optic lens, optic package, backlight assembly and display device having the same | |
| US20170023724A1 (en) | Optical Module And Reflective Display Apparatus | |
| WO2009128164A1 (en) | Optical device, uniform illumination device, optical sheet, backlight unit, and display unit | |
| JP2009150940A (en) | Optical sheet, back light unit, back light device, and display device | |
| JP2009187904A (en) | Light source unit, back light unit, and display | |
| CN110646981A (en) | Display device | |
| JPH10241434A (en) | Light directional sheet and directional surface light source using it | |
| US20180314110A1 (en) | Backlight module and surface light source assembly thereof | |
| CN210244014U (en) | Backlight module, display screen and mobile terminal | |
| KR20190005951A (en) | Backlight modules and display devices | |
| JP2016194996A (en) | Backlight device and display device | |
| KR20080061287A (en) | Planar light source apparatus, display apparatus and planar illumination method | |
| US8558966B2 (en) | Liquid crystal display device including back light having improved light concentration efficiency | |
| CN115903304A (en) | Optical film and backlight unit including the same | |
| KR102303583B1 (en) | Backlight unit and liquid crystal display | |
| JP4321659B1 (en) | Optical device, optical uniform device, optical sheet, backlight unit and display device | |
| KR100896716B1 (en) | Optical sheet | |
| JP2016194989A (en) | Backlight device and display device | |
| JP2010032781A (en) | Optical device, optical diffusion device, optical sheet, back light unit and display device | |
| CN108398829B (en) | Backlight module based on quantum dots and manufacturing method thereof | |
| KR100989167B1 (en) | backlight unit | |
| CN112771308B (en) | Light guide assembly, light source module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200117 |
|
| RJ01 | Rejection of invention patent application after publication |