CN110376796A - A kind of backlight module, its production method and display device - Google Patents
A kind of backlight module, its production method and display device Download PDFInfo
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- CN110376796A CN110376796A CN201910703827.1A CN201910703827A CN110376796A CN 110376796 A CN110376796 A CN 110376796A CN 201910703827 A CN201910703827 A CN 201910703827A CN 110376796 A CN110376796 A CN 110376796A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 19
- 238000002834 transmittance Methods 0.000 claims description 27
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 8
- 238000001746 injection moulding Methods 0.000 claims description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 5
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 4
- 229920000515 polycarbonate Polymers 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract 3
- 241001025261 Neoraja caerulea Species 0.000 abstract 2
- 238000004020 luminiscence type Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 2
- 239000012788 optical film Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000003848 UV Light-Curing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002858 crystal cell Anatomy 0.000 description 1
- 238000001723 curing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- 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
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The embodiment of the present disclosure provides a kind of backlight module, its production method and display device, by local location, that is, first area of the light guide plate in backlight module, fluorescent powder is set, and blue-ray LED outgoing blue light excitated fluorescent powder is separately provided and obtains white light, in the backlight work of side entering type, blue-ray LED irradiates the fluorescent powder of first area simultaneously, so that realizing self-luminous in the first area of light guide plate, realize that brightness of the light guide plate in first area is greater than second area.The first area of backlight module corresponds to lesser first viewing area of light transmission rate in liquid crystal display panel, the second area of backlight module corresponds to biggish second viewing area of light transmission rate in liquid crystal display panel, the first viewing area of liquid crystal display panel and the light transmission rate difference of the second viewing area can be made up by improving the brightness of first area in backlight module, the problem of so as to improve brightness unevenness.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a backlight module, a method for manufacturing the same, and a display device.
Background
At present, the fingerprint identification function is realized in the liquid crystal display panel, and the photosensitive sensor is arranged in the fingerprint identification area in the liquid crystal display panel, and the photosensitive sensor can occupy the space in the liquid crystal box, so that the light penetration rate in the fingerprint identification area is smaller than other positions, the brightness of the fingerprint identification area and other positions is different, and the phenomenon of uneven brightness appears visually.
Disclosure of Invention
The embodiment of the invention provides a backlight module, a manufacturing method thereof and a display device, which are used for solving the problem that the brightness of an existing display panel with a fingerprint identification area is uneven.
An embodiment of the present invention provides a backlight module, including: the backlight module comprises a light guide plate, a lateral backlight source and a blue LED; wherein,
the light guide plate is divided into a first area and a second area, and fluorescent powder is contained in the first area;
the light emitting surface of the blue light LED faces the first area, and the blue light emitted by the blue light LED excites the fluorescent powder to obtain white light.
On the other hand, an embodiment of the present invention further provides a display device, including: the backlight module comprises a liquid crystal display panel and the backlight module provided by the embodiment of the invention;
the liquid crystal display panel is provided with a first display area and a second display area, and the transmittance of the first display area is smaller than that of the second display area;
the first area in the backlight module corresponds to the first display area, and the second area corresponds to the second display area.
On the other hand, an embodiment of the present invention further provides a method for manufacturing the backlight module, including:
and forming a first area and a second area of the light guide plate by adopting a double-material injection molding mode.
The invention has the following beneficial effects:
according to the backlight module, the manufacturing method thereof and the display device provided by the embodiment of the invention, the fluorescent powder is arranged at the local position of the light guide plate of the backlight module, namely the first area, and the blue light emitted by the blue light LED is independently arranged to excite the fluorescent powder to obtain white light. The first area of the backlight module corresponds to the first display area with smaller light transmittance in the liquid crystal display panel, the second area of the backlight module corresponds to the second display area with larger light transmittance in the liquid crystal display panel, and the brightness of the first area in the backlight module is improved to make up the difference of the light transmittance of the first display area and the light transmittance of the second display area of the liquid crystal display panel, so that the problem of uneven brightness is solved.
Drawings
FIG. 1 is a diagram illustrating a conventional display device for fingerprint recognition;
FIG. 2 is a schematic top view of a conventional display device for implementing fingerprint recognition;
FIG. 3 is a schematic side view of a conventional display device for performing fingerprint recognition;
fig. 4 is a schematic top view of a backlight module according to an embodiment of the present invention;
fig. 5 is a schematic top view illustrating a backlight module according to an embodiment of the invention;
fig. 6 is a schematic top view illustrating a backlight module according to an embodiment of the present invention;
fig. 7 is a schematic top view illustrating a backlight module according to an embodiment of the invention;
fig. 8 is a schematic side view of a backlight module according to an embodiment of the invention;
FIG. 9 is a schematic side view of a display device according to an embodiment of the present invention;
fig. 10 is a schematic top view of a display device according to an embodiment of the present invention;
fig. 11 is a schematic flow chart illustrating a method for manufacturing a backlight module according to an embodiment of the invention;
fig. 12 is a schematic flowchart illustrating a method for manufacturing a backlight module according to an embodiment of the invention.
Detailed Description
As shown in fig. 1, a fingerprint recognition function is implemented in a liquid crystal display panel, as shown in fig. 2 and 3, a fingerprint recognition area P is currently set in a liquid crystal display panel 02, and a photosensor 03(sensor) is set only in the fingerprint recognition area P, that is, the photosensor 03 is set in a liquid crystal box at a local position of the liquid crystal display panel 02, visible light emitted from a backlight 011 passes through a light guide plate 012, a lower polarizer 021, an array substrate 022, a gap between the photosensors 03, a color film substrate 023, an upper polarizer 024 and a protective cover 025, and then irradiates a fingerprint of a finger 04, and irradiates the photosensor 03 after being reflected by a fingerprint valley b and a fingerprint ridge a, and the photosensor 03 converts received optical signals with different intensities into electrical signals, thereby finally completing fingerprint imaging.
Because the fingerprint identification area P is provided with a plurality of devices related to fingerprint identification, such as a fingerprint identification thin film transistor, a fingerprint identification signal line and a photosensitive sensor 03, the light transmittance in the fingerprint identification area P is smaller than that in other positions, so that the brightness of the fingerprint identification area P is different from that in other positions, and the phenomenon of uneven brightness appears visually.
The embodiment of the invention provides a backlight module, a manufacturing method thereof and a display device, aiming at the problem that the brightness of an existing display panel with a fingerprint identification area is uneven. In order to make the purpose, technical solution and advantages of the present invention clearer, specific embodiments of a backlight module, a manufacturing method thereof and a display device according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
An embodiment of the present invention provides a backlight module, as shown in fig. 4 to 7, including: the backlight module comprises a light guide plate 1, a side-in backlight 2 and a blue LED 3; wherein,
the light guide plate 1 is divided into a first area M and a second area N, and fluorescent powder is contained in the first area M;
the light emitting surface of the blue light LED3 faces the first region M, and blue light emitted from the blue light LED3 excites the fluorescent powder to obtain white light.
Specifically, in the backlight module provided in the embodiment of the present invention, the phosphor is disposed in the local position of the light guide plate 1, that is, the first area M, and the blue LED3 is separately disposed to emit blue light to excite the phosphor to obtain white light, and when the lateral backlight 2 works, the blue LED3 simultaneously irradiates the phosphor in the first area M, so that self-luminescence is realized in the first area M of the light guide plate 1, and the brightness of the light guide plate 1 in the first area M is greater than that in the second area N. When the backlight module provided in the embodiment of the present invention is applied to a liquid crystal display panel having display areas with different transmittances, for example, the liquid crystal display panel 100 shown in fig. 9 and 10 has a first display area a and a second display area B, the first display area a can be used as a fingerprint identification area, the transmittance of the first display area a is smaller than that of the second display area B, the first area M of the backlight module 200 can correspond to the first display area a, and the second area N can correspond to the second display area B, and increasing the brightness of the first area M in the backlight module 200 can compensate for the difference in the transmittances of the first display area a and the second display area B of the liquid crystal display panel 100, thereby improving the problem of uneven brightness.
Specifically, in the backlight module provided in the embodiment of the present invention, the position of the first region M containing the phosphor may be designed according to the position of the first display region, which is the display region with a low light transmittance set in the liquid crystal display panel. For example, as shown in fig. 4, the first region M may be located at a lower right corner of the light guide plate 1, and as shown in fig. 5, the first region M is located at a lower middle portion of the light guide plate 1, which is not limited herein. Generally, in the backlight module provided in the embodiment of the invention, as shown in fig. 4, the second region N generally surrounds the first region M, the backlight 2 may be located at the first side 1a of the light guide plate 1, the second side 1b of the light guide plate 1 may be provided with the blue LEDs 3, and the first side 1a and the second side 1b are adjacent to each other.
Specifically, in the backlight module provided in the embodiment of the present invention, the backlight source 2 generally adopts a white LED already packaged on the light bar, and the blue LED3 may be located on a different side of the light guide plate 1 from the white LED. In addition, the blue LED3 may be disposed at a side of the light guide plate 1 closer to the first region M, so that the light emitted from the blue LED3 can excite the phosphor in the first region M to emit white light with higher efficiency.
It is to be noted that, in the backlight module provided in the embodiment of the present invention, the white light LED may be formed by packaging a blue light chip and a phosphor (e.g., yellow phosphor) capable of converting blue light into white light, and the blue light emitted from the blue light chip in the white light LED excites the yellow phosphor to generate white light, so that the white light LED emits white light. The blue LED refers to an LED chip capable of emitting blue light, and the LED chip does not contain phosphor therein, that is, the blue LED emits blue light, and the emitted blue light is incident into the light guide plate.
Optionally, in the backlight module provided in the embodiment of the invention, as shown in fig. 5, the third side 1c of the light guide plate 1 may also be provided with a blue LED3, and the third side 1c is adjacent to the first side 1a and opposite to the second side 1 b.
Specifically, blue light is irradiated to the first region M simultaneously by the blue light LED3 disposed on the third side 1c and the second side 1b, so that the blue light emitted from different directions excites the phosphor in the first region M to emit white light, thereby improving the utilization rate of the phosphor. In addition, the number of the blue LEDs 3 disposed on the third side 1c and the second side 1b may be one or more, and there is no requirement for the number again. Of course, as shown in fig. 4, the blue LED3 may be disposed only on one side of the light guide plate 1, which is not limited herein.
Specifically, since the phosphor in the first region M emits white light after being excited by blue light, the luminance difference at the boundary between the first region M and the second region N is more obvious. Based on this, optionally, in the backlight module provided in the embodiment of the present invention, as shown in fig. 6, the first region M may include a first sub-region M1 and a second sub-region M2, the first sub-region M1 surrounds the second sub-region M2, and the concentration of the phosphor in the first sub-region M1 is less than the concentration of the phosphor in the second sub-region M2.
Specifically, by adjusting the phosphor concentration of the edge region, i.e., the second sub-region M2, in the first region M to be smaller than the phosphor concentration of the center region, i.e., the first sub-region M1, the light emission luminance at a portion of the first region M close to the second region N can be controlled to be weak to smoothly transition the luminance difference between the first region M and the second region N.
Further, optionally, in the backlight module provided in the embodiment of the present invention, as shown in fig. 7, the first region M may further include a third sub-region M3, the third sub-region M3 is located between the first sub-region M1 and the second sub-region M2, and the concentration of the phosphor in the third sub-region M3 gradually increases along a direction in which the first sub-region M1 points to the second sub-region M2.
Specifically, the phosphor with gradually changing concentration is arranged in the third sub-region M3 connected between the first sub-region M1 and the second sub-region M2, so that the third sub-region M3 forms a light-emitting brightness transition region, which can perform a smooth transition effect on the brightness difference between the first sub-region M1 and the second sub-region M2.
Optionally, in the backlight module provided in the embodiment of the invention, a light transmittance of the first region of the light guide plate is greater than a light transmittance of the second region. The first area M comprises a glue material, and the fluorescent powder is distributed in the glue material, and particularly, the fluorescent powder can be doped in materials such as UV curing glue and the like to realize the manufacturing of the first area M; the material of the second region N may be polymethyl methacrylate (PMMA) or other materials with high light transmittance, or Polycarbonate (PC) or other materials with relatively low light transmittance.
Optionally, in the backlight module provided in the embodiment of the present invention, as shown in fig. 8, the backlight module may further include: the mesh points 4 are located on the back of the light guide plate 1, the light guide plate 1 further includes a fourth side 1d, the fourth side 1d is opposite to the first side 1a, and the distribution density of the mesh points 4 gradually increases along a direction from the first side 1a to the fourth side 1 d.
Specifically, when light emitted from the backlight 2 and the blue LED strikes each dot 4, i.e., the light guide point, the dot 4 diffuses the reflected light to each angle. The second region N of the light guide plate 1 can uniformly emit light through the mesh points 4 with different densities and sizes. The dots 4 may protrude from the back surface of the light guide plate 1 as shown in fig. 8, and the dots 4 may also be recessed into the back surface of the light guide plate, which is not limited herein. Moreover, the material of the mesh points 4 can be the same as that of the light guide plate 1, namely, the mesh points and the light guide plate can form an integral structure; the material of the mesh points 4 may also be different from that of the light guide plate 1, i.e. they are independent structures.
Further, a reflective sheet may be disposed on the side of the light guide plate 1 having the mesh points 4 for reflecting light back into the light guide plate 1 to improve the light utilization efficiency.
Furthermore, in the backlight module provided in the embodiment of the present invention, as shown in fig. 8, an optical film 5 located on the light-emitting surface of the light guide plate 1 may be further included, and the optical film 5 may specifically include a prism structure, an antireflection film layer, a diffusion sheet, and the like, which is not limited herein.
Based on the same inventive concept, the embodiment of the invention also provides a display device. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the display device are understood by those skilled in the art, and are not described herein or should not be construed as limiting the invention. The implementation of the display device can be seen in the above embodiments of the backlight module, and repeated descriptions are omitted.
Specifically, a display device according to an embodiment of the present invention, as shown in fig. 9 and 10, includes: a liquid crystal display panel 100 and the backlight module 200 provided by the embodiment of the invention;
the liquid crystal display panel 100 has a first display area a and a second display area B, and the transmittance of the first display area a is smaller than that of the second display area B;
the first region M of the backlight module 200 corresponds to the first display area a, and the second region N corresponds to the second display area B.
Specifically, the phosphor is disposed in a local position, i.e., the first area M, of the light guide plate 1 of the backlight module 200, and the blue LED3 is separately disposed to excite the phosphor to obtain white light, when the lateral backlight 2 works, the blue LED3 simultaneously irradiates the phosphor in the first area M, so that self-luminescence is realized in the first area M of the light guide plate 1, and the brightness of the light guide plate 1 in the first area M is greater than that in the second area N. The first region M of the backlight module 200 corresponds to the first display region a with a smaller light transmittance in the liquid crystal display panel, and the second region N of the backlight module 200 corresponds to the second display region B with a larger light transmittance in the liquid crystal display panel, so that the brightness of the first region M of the backlight module 200 can be increased to compensate for the difference of the light transmittances of the first display region a and the second display region B of the liquid crystal display panel 100, thereby improving the problem of uneven brightness.
Specifically, in the liquid crystal display panel 100, the difference in light transmittance of the first display area a and the second display area B may be caused by various reasons, for example, alternatively, in the above-described display device provided in the embodiment of the present invention, as shown in fig. 10, the first display area a may be a fingerprint identification area, and the light sensing device 102 is disposed in the first display area a. In addition, devices related to fingerprint identification, such as a fingerprint identification thin film transistor and a fingerprint identification signal line, are also disposed in the first display area a, and in order not to affect normal display, the devices related to fingerprint identification and the pixel unit 101 are not overlapped with each other, so that the devices related to fingerprint identification occupy the space in the liquid crystal cell, which results in a decrease in light transmittance in the first display area a. That is, the problem of the decrease of the light transmittance in the fingerprint identification area cannot be avoided in the liquid crystal display panel 100, but in the present invention, the fluorescent powder is added in the first area M corresponding to the fingerprint identification area in the backlight module, and the fluorescent powder is irradiated by the single blue LED3 to realize the self-luminescence of the white light in the first area M, so that the light output amount, i.e., the light brightness, from the backlight module 200 to the fingerprint identification area can be increased, and the problem of the uneven brightness caused by the lower light transmittance in the fingerprint identification area can be compensated.
In addition, the blue light emitted by the blue LED3 added in the backlight module 200 is inevitably guided out to the liquid crystal display panel by the second region N except the portion irradiated to the phosphor, and the portion of the blue light directly incident to the liquid crystal display panel does not have a large influence on the display, because the color resistance in the liquid crystal display panel filters the portion of the blue light.
Based on the same inventive concept, embodiments of the present invention further provide a method for manufacturing the backlight module, and since the principle of the method for solving the problem is similar to that of the backlight module, the implementation of the method for manufacturing the backlight module can refer to the implementation of the backlight module, and repeated details are not repeated.
Specifically, as shown in fig. 11, the method for manufacturing the backlight module according to the embodiment of the present invention may include:
s100, forming a first area and a second area of the light guide plate by adopting a double-material injection molding mode.
Specifically, the two-material injection molding method is to use two different materials to respectively manufacture different areas of the light guide plate.
Optionally, in the manufacturing method provided in the embodiment of the present invention, a double-material injection molding manner is adopted to form the first region and the second region of the light guide plate, as shown in fig. 12, the method may specifically include:
s101, forming a light guide plate in a second area by adopting a polymethyl methacrylate or polycarbonate material;
s102, forming a light guide plate in the first area by adopting a glue material doped with fluorescent powder.
Generally, the second region of the light guide plate occupies a larger area and generally surrounds the first region, so step S101 may be performed first to fabricate the second region of the light guide plate, then step S102 may be performed to inject the fluorescent powder-doped glue material into the first region, and finally the final light guide plate is formed by curing.
In the backlight module, the manufacturing method thereof and the display device provided by the embodiment of the invention, the fluorescent powder is arranged at the local position of the light guide plate of the backlight module, namely the first area, and the blue light LED is independently arranged to excite the fluorescent powder to obtain white light. The first area of the backlight module corresponds to the first display area with smaller light transmittance in the liquid crystal display panel, the second area of the backlight module corresponds to the second display area with larger light transmittance in the liquid crystal display panel, and the brightness of the first area in the backlight module is improved to make up the difference of the light transmittance of the first display area and the light transmittance of the second display area of the liquid crystal display panel, so that the problem of uneven brightness is solved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A backlight module, comprising: the backlight module comprises a light guide plate, a lateral backlight source and a blue LED; wherein,
the light guide plate is divided into a first area and a second area, and fluorescent powder is contained in the first area;
the light emitting surface of the blue light LED faces the first area, and the blue light LED emits blue light to excite the fluorescent powder to obtain white light.
2. The backlight module as claimed in claim 1, wherein the second region surrounds the first region, the backlight source is disposed at a first side of the light guide plate, the blue LEDs are disposed at a second side of the light guide plate, and the first side and the second side are adjacent.
3. The backlight module as claimed in claim 2, wherein the blue LED is disposed on a third side of the light guide plate, and the third side is adjacent to the first side and opposite to the second side.
4. The backlight module of claim 2, further comprising: the light guide plate comprises a light guide plate and mesh points positioned on the back surface of the light guide plate, the light guide plate further comprises a fourth side edge, the fourth side edge is opposite to the first side edge, and the distribution density of the mesh points is gradually increased along the direction from the first side edge to the fourth side edge.
5. The backlight module of claim 1, wherein the first region comprises a first sub-region and a second sub-region, the first sub-region surrounds the second sub-region, and the concentration of the phosphor in the first sub-region is less than the concentration of the phosphor in the second sub-region.
6. The backlight module according to claim 5, wherein the first region further comprises a third sub-region, the third sub-region is located between the first sub-region and the second sub-region, and the concentration of the phosphor in the third sub-region gradually increases along a direction in which the first sub-region points to the second sub-region.
7. The backlight module according to any one of claims 1-6, wherein the first region comprises a glue material, and the phosphor is distributed in the glue material; the material of the second area is polymethyl methacrylate or polycarbonate.
8. A display device, comprising: a liquid crystal display panel and a backlight module according to any one of claims 1 to 7;
the liquid crystal display panel is provided with a first display area and a second display area, and the transmittance of the first display area is smaller than that of the second display area;
the first area in the backlight module corresponds to the first display area, and the second area corresponds to the second display area.
9. The display device as claimed in claim 8, wherein the first display area is a fingerprint identification area, and a light sensing device is disposed in the first display area.
10. A method for manufacturing a backlight module according to any one of claims 1 to 7, comprising:
and forming a first area and a second area of the light guide plate by adopting a double-material injection molding mode.
11. The method according to claim 10, wherein the forming of the first region and the second region of the light guide plate by a two-material injection molding method specifically comprises:
forming the light guide plate in the second region by using a polymethyl methacrylate or polycarbonate material;
and forming the light guide plate in the first area by adopting a glue material doped with fluorescent powder.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113296314A (en) * | 2021-06-01 | 2021-08-24 | 厦门天马微电子有限公司 | Display module and display device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749554A (en) * | 2008-12-08 | 2010-06-23 | 厦门市光莆电子有限公司 | Energy-saving ultra-thin LED plane display lamp |
| CN106778598A (en) * | 2016-12-12 | 2017-05-31 | 红蝶科技(深圳)有限公司 | Fingerprint recognition module with backlight |
| CN109581749A (en) * | 2019-01-31 | 2019-04-05 | 鸿富锦精密工业（深圳）有限公司 | Display device |
| CN208953839U (en) * | 2018-10-29 | 2019-06-07 | 惠州市宝明精工有限公司 | Finger touch identifies back light module unit structure under a kind of screen |
| CN208953842U (en) * | 2018-11-19 | 2019-06-07 | 惠州市宝明精工有限公司 | A kind of backing structure of infrared ray high-penetration rate |
| CN208953838U (en) * | 2018-10-29 | 2019-06-07 | 惠州市宝明精工有限公司 | Finger touch identifies back light module unit structure under a kind of improved screen |
-
2019
- 2019-07-31 CN CN201910703827.1A patent/CN110376796B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749554A (en) * | 2008-12-08 | 2010-06-23 | 厦门市光莆电子有限公司 | Energy-saving ultra-thin LED plane display lamp |
| CN106778598A (en) * | 2016-12-12 | 2017-05-31 | 红蝶科技(深圳)有限公司 | Fingerprint recognition module with backlight |
| CN208953839U (en) * | 2018-10-29 | 2019-06-07 | 惠州市宝明精工有限公司 | Finger touch identifies back light module unit structure under a kind of screen |
| CN208953838U (en) * | 2018-10-29 | 2019-06-07 | 惠州市宝明精工有限公司 | Finger touch identifies back light module unit structure under a kind of improved screen |
| CN208953842U (en) * | 2018-11-19 | 2019-06-07 | 惠州市宝明精工有限公司 | A kind of backing structure of infrared ray high-penetration rate |
| CN109581749A (en) * | 2019-01-31 | 2019-04-05 | 鸿富锦精密工业（深圳）有限公司 | Display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113296314A (en) * | 2021-06-01 | 2021-08-24 | 厦门天马微电子有限公司 | Display module and display device |
| CN113296314B (en) * | 2021-06-01 | 2022-07-12 | 厦门天马微电子有限公司 | Display module and display device |
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|---|---|
| CN110376796B (en) | 2022-04-19 |
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