CN111211211A - LED area light source and display device - Google Patents
LED area light source and display device Download PDFInfo
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- CN111211211A CN111211211A CN202010031345.9A CN202010031345A CN111211211A CN 111211211 A CN111211211 A CN 111211211A CN 202010031345 A CN202010031345 A CN 202010031345A CN 111211211 A CN111211211 A CN 111211211A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/58—Optical field-shaping elements
- H01L33/60—Reflective elements
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
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Abstract
The invention relates to an LED (light emitting diode) area light source and a display device, wherein the LED area light source comprises an LED lamp panel, a light emitting layer and a reflective enclosing wall, and the LED lamp panel comprises a light emitting area; the light emitting layer comprises an LED chip which is arranged in a light emitting area of the LED lamp panel; the reflection enclosure comprises reflection particles and a first transparent plastic substrate, the reflection particles are distributed in the first transparent plastic substrate, and the reflection enclosure is tightly arranged on the periphery of the light emitting layer in a surrounding mode and used for reflecting light emitted from the light emitting region. According to the LED surface light source and the display device, the reflection enclosing wall is tightly arranged on the periphery of the luminous layer in a surrounding mode, the reflection enclosing wall can reflect and recycle light emitted from the luminous region, the path of the emitted light is changed, the LED light around the luminous region is prevented from going outwards, the brightness uniformity of the whole LED surface light source is ensured, and the problem that the peripheral brightness of an LED lamp panel is lower than the central brightness is solved.
Description
Technical Field
The invention relates to the technical field of LED packaging and display, in particular to an LED surface light source and a display device.
Background
For a conventional structure backlight source, for example, a Chip Scale Package (CSP) module structure or a blue light structure in which a blue light Chip is converted into white light, as shown in fig. 1, an LED Chip is disposed on an LED lamp panel, an optical film and a liquid crystal panel are sequentially disposed above the LED Chip, and the LED Chip emits light to form the structure backlight source. In actual detection or use, the peripheral brightness of the LED lamp panel is reduced by 30% -40% on average compared with the central brightness, so that the overall brightness of the backlight source is reduced by 20%, and the display effect is further influenced.
Disclosure of Invention
Accordingly, it is necessary to provide an LED surface light source and a display device for solving the problem of low peripheral brightness of the conventional backlight.
The LED area light source comprises an LED lamp panel, a luminous layer and a reflection enclosing wall, wherein the LED lamp panel comprises a luminous area; the light emitting layer comprises an LED chip which is arranged in a light emitting area of the LED lamp panel; the reflection enclosure comprises reflection particles and a first transparent plastic substrate, the reflection particles are distributed in the first transparent plastic substrate, and the reflection enclosure is tightly arranged on the periphery of the light emitting layer in a surrounding mode and used for reflecting light emitted from the light emitting region.
In one embodiment, the width of the reflective fence is greater than or equal to 100 nm.
In one embodiment, the transparency range of the first transparent plastic substrate is 95% -99%, the particle size range of the reflective particles is 0-200 μm, and the mass ratio of the reflective particles to the first transparent plastic substrate is 5:100 and 100: 100.
In one embodiment, the reflective particles are metal-optical particles or non-metal-optical particles; the metal optical particles comprise any one or combination of Ag, Al, Rh, Cr, Pt, Cu, Au and Ti particles; the non-metallic optical particles comprise nanoscale TiO2、ZnO、BaSO4、Al2O3Any one or combination of particles.
In one embodiment, an adhesion promoter is arranged between the reflection enclosing wall and the LED lamp panel, so that the reflection enclosing wall is arranged on the periphery of the luminescent layer in a closely surrounding manner.
In one embodiment, the number of the LED chips is two or more, optical colloid is filled between the LED chips, the optical colloid includes optical particles and a second transparent plastic substrate, and the optical particles are distributed in the second transparent plastic substrate and used for refracting and/or reflecting light emitted by the LED chips, so that the brightness of the light emitting layer is uniform.
In one embodiment, the height of the reflective fence is greater than or equal to the height of the optical gel.
In one embodiment, the LED chips are distributed in an array in the light emitting area of the LED lamp panel.
In one embodiment, the optical particles are plastic particles, the transparency range of the second transparent plastic substrate is 95% -99%, the particle size range of the optical particles is 5-20 μm, and the mass ratio of the reflective particles to the first transparent plastic substrate is 25% -35%.
The invention also provides a display device which comprises a liquid crystal panel, an optical film and the LED surface light source, wherein the optical film and the liquid crystal panel are sequentially arranged above the LED surface light source.
The LED area light source and the display device have the advantages that:
according to the LED area light source and the display device, the reflection enclosing wall is tightly arranged at the periphery of the luminous layer in a surrounding mode and comprises the reflection particles and the first transparent plastic base material, the reflection enclosing wall can reflect and recycle light emitted from the luminous region, the path of the emitted light is changed, the LED light around the luminous region is prevented from going outwards, the brightness uniformity of the whole LED area light source is ensured, and the problem that the peripheral brightness of an LED lamp panel is lower than the central brightness is solved.
Drawings
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Fig. 2 is a schematic top view of an LED surface light source according to an embodiment of the present invention.
Fig. 3 is a longitudinal sectional view of an LED surface light source according to an embodiment of the present invention.
FIG. 4 is a graph showing the relationship between the reflectance of different reflective particles and the wavelength of incident light.
Fig. 5 is a schematic structural diagram of a light emitting layer disposed behind a light emitting region of an LED lamp panel according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a light emitting layer disposed behind a light emitting region of an LED lamp panel according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of the reflective particles and the first transparent plastic substrate mixed according to an embodiment of the present invention.
Reference numerals:
the LED surface light source comprises an LED surface light source 100, an LED lamp panel 110, a light emitting area 111 and an edge area 112; a luminescent layer 120, an LED chip 121, an optical colloid 122, optical particles 123, and a second transparent plastic substrate 124; reflective wall 130, reflective particles 131, first transparent plastic substrate 132, first frame 133, second frame 134, third frame 135, fourth frame 136:
an optical film 200; a liquid crystal panel 300; the width of the reflection fence is w, the height of the reflection fence is H1, and the height of the optical colloid is H2.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
The invention provides an LED (light emitting diode) surface light source and a display device, in one embodiment, the structure of the display device is shown in FIG. 1, and the display device comprises an LED surface light source 100, an optical film 200 and a liquid crystal panel 300, wherein the optical film 200 and the liquid crystal panel 300 are sequentially positioned above the LED surface light source 100, and the LED surface light source 100 is used as a backlight source and provides light for the display device; the liquid crystal panel 300 functions as a light valve, and controls the emission of backlight light by cooperating with the optical film 200.
In one embodiment, the structure of the LED surface light source 100 is shown in fig. 2 and 3, wherein fig. 2 is a schematic top view structure of the LED surface light source 100, fig. 3 is a longitudinal cross-sectional view of the LED surface light source 100, as shown in fig. 2 and 3, the LED surface light source 100 includes an LED lamp panel 110, a light emitting layer 120 and a reflective fence 130, wherein the LED lamp panel 110 includes a light emitting region 111 and a rim region 112, and the rim region 112 surrounds the light emitting region 111; the light emitting layer 120 is located in the light emitting region 111 of the LED lamp panel 110, the light emitting layer 120 includes LED chips 121, and the LED chips 121 are distributed in the light emitting region 111 of the LED lamp panel 110 in an array; the reflective enclosing wall 130 is tightly arranged around the periphery of the light-emitting layer 120, the reflective enclosing wall 130 comprises reflective particles 131 and a first transparent plastic substrate 132, the reflective particles 131 are distributed in the first transparent plastic substrate 132, the reflective enclosing wall 130 is tightly arranged around the periphery of the light-emitting layer 120 and is used for reflecting and recycling the light emitted from the light-emitting region 111, the path of the emitted light is changed, the light emitted from the light-emitting region 111 is reflected by the reflective enclosing wall 130 and then emitted back to the light-emitting region 111, so that the reflective enclosing wall 130 can prevent the LED light around the light-emitting region 111 from outwards running, the brightness uniformity of the whole LED surface light source 100 is ensured, and the problem that the brightness around the light-emitting layer.
In addition, as shown in fig. 2, the light emitting layer further includes an optical colloid 122, the optical colloid 122 is filled between the LED chips 121, the optical colloid 122 includes optical particles 123 and a second transparent plastic substrate 124, the optical particles 123 are distributed in the second transparent plastic substrate 124, and the optical particles 123 are used for diffusing, refracting and/or reflecting light emitted by the LED chips 121, so as to solve the problem of uneven light emission caused by too high local brightness of light emitting points of the LED chips 121. As shown by the dotted line in fig. 3, light emitted between two LED chips 121 located in the non-edge region of the light emitting region 111 overlaps with each other, light emitted by the LED chips 121 located in the outer edge region of the light emitting region 111 and departing from the light emitting region 111 is reflected by the reflective fence 130, and the emergent light and the reflected light overlap with each other, so that the entire light emitting layer 120, no matter the light emitting layer 120 located in the light emitting region 111 of the LED lamp panel 110 or the light emitting layer 120 located in the edge region 112 of the LED lamp panel 110, has overlapped light rays, and has high luminance, and the luminance of the entire light emitting layer 120 is uniform, and there is no problem that the luminance of the light emitting point of the LED chip.
In one embodiment, the transparency of the first transparent plastic substrate 132 is in a range of 95% to 99%, the first transparent plastic substrate 132 may be PMMA (polymethyl methacrylate), PC (polycarbonate), Silicon (Silicon based resin) or Epoxy (Epoxy based resin), the particle size of the reflective particles 131 is in a range of 0-200 μm, and the mass ratio of the reflective particles 131 to the first transparent plastic substrate 132 is 5: 100. In a preferred embodiment, the reflective particles 131 have a particle size in the range of 5 μm to 20 μm, and the reflective particles 131 are metal optical particles or non-metal optical particles, the metal optical particles include any one or a combination of Ag, Al, Rh, Cr, Pt, Cu, Au, Ti particles; the non-metallic optical particles comprise nano-sized TiO2、ZnO、BaSO4、Al2O3Any one or combination of particles. The reflectance of the metal optical particles is related to the wavelength of incident light and the arrangement density of the metal optical particles themselves, and the larger the arrangement density is, the larger the area receiving the incident light is, and the higher the reflectance is accordingly. Inversion of different metal-optical particles when the arrangement density is the sameThe relationship between the refractive index and the wavelength of the incident light is shown in fig. 4, since the wavelength range of the blue LED is 460-470nm, the refractive index of the different metal optical particles of the CSP module structure or the LED surface light source 100 with the blue chip converted into white light is Ag, Al, Rh, Cr, Pt, Cu, and Au from high to low, wherein the refractive index of Ag is as high as 92% -97%, and the refractive index of the common white PC frame is about 40% -60%.
In one embodiment, the optical particles 123 are plastic particles, the transparency of the second transparent plastic substrate 124 ranges from 95% to 99%, the particle size of the optical particles 123 ranges from 5 μm to 20 μm, and the mass ratio of the reflective particles 131 to the first transparent plastic substrate 132 ranges from 25% to 35%. In one embodiment, the optical colloid 122 is prepared by placing the fine plastic particles of Silicon or Epoxy material, for example, the plastic particles with a particle size of 5-10um, into the transparent plastic substrate of Silicon or PMMA material, wherein the light transmittance of the transparent plastic substrate is 95% -99%, adjusting the appropriate mixing ratio, and the mass ratio of the plastic particles to the transparent plastic substrate is 25% -35%, and the optical colloid 122 prepared by the above method has the light diffusion function.
In addition, as shown in fig. 3, the width of the reflective wall 130 is w, and in one embodiment, the width of the reflective wall 130 is greater than or equal to 100nm, so as to improve the reflective effect of the reflective wall 130. In addition, the height H1 of the reflective enclosing wall 130 is greater than or equal to the height H2 of the optical colloid 122, so that all the light rays emitted from the light emitting region 111 can be effectively reflected and recovered by the reflective enclosing wall 130, the LED light around the light emitting region 111 is prevented from going outward, the brightness uniformity of the whole LED surface light source 100 is ensured, and the problem of low brightness around the light emitting layer 120 is solved.
In addition, in an embodiment, an adhesion promoter is disposed between the reflective wall 130 and the periphery of the light emitting layer 120, so that the reflective wall 130 is tightly attached to the periphery of the light emitting layer 120, and the reflective wall 130 is prevented from being separated from or peeled off from the light emitting layer 120. In another embodiment, an adhesion promoter is also disposed between the reflective wall 130 and the LED lamp panel 110, so that the reflective wall 130 is more closely attached to the periphery of the light emitting layer 120, and the reflective wall 130 is prevented from being separated from or peeled off from the light emitting layer 120 and the LED lamp panel 110. In one embodiment, the adhesion promoter is a Primer adhesion promoter comprising methyl acetate and tributyl acylcitrate as major components.
In an embodiment, as shown in fig. 5, a process of processing the LED surface light source 100 includes first disposing a light emitting layer 120 on a light emitting region 111 of an LED lamp panel 110, where the light emitting layer 120 includes LED chips 121 and optical colloids 122 distributed in an array, the optical colloids 122 are distributed between two adjacent LED chips 121, the optical colloids 122 include optical particles 123 and a second transparent plastic substrate 124, and the optical particles 123 are distributed in the second transparent plastic substrate 124. Then, as shown in fig. 6, the reflective particles 131 and the first transparent plastic substrate 132 are mixed, and then coated on the periphery of the light emitting layer 120 to form the reflective wall 130 on the periphery of the light emitting layer 120, and the coated structure is shown in fig. 2.
In one embodiment, the reflective particles 131 of the reflective wall 130 are Ag with a particle size of 200 μm, and the first transparent plastic substrate 132 is PMMA. As shown in fig. 2, the reflection fence 130 is rectangular and includes four frames, namely a first frame 133, a second frame 134, a third frame 135 and a fourth frame 136, and brightness values at different positions before and after the four frames are improved are respectively detected, the white PC glue frame is adopted at the periphery of the light-emitting layer 120 in the comparison example before the improvement, and the reflection fence 130 is adopted at the periphery of the light-emitting layer 120 in the scheme after the improvement, and the result is shown in table 1 below, and it can be seen from the result in table 1 that the brightness value at the frame is averagely increased by 22.75% in the scheme after the improvement compared with the scheme before the improvement.
Table 1 brightness values at different positions before and after four frame improvement
In another embodiment, the reflective enclosing wall is also substantially an optical colloid, that is, the LED surface light source includes an LED lamp panel, an LED chip, a first optical colloid and a second optical colloid, wherein the LED lamp panel includes a light emitting region and an edge region, and the edge region surrounds the light emitting region; the LED chip is arranged in the light emitting area; the first optical colloid is coated on the light emitting region and filled between the LED chips; the second optical colloid comprises reflective particles and a first transparent plastic substrate, the reflective particles are distributed in the first transparent plastic substrate, and the second optical colloid is coated on the edge region and surrounds the LED chip and is used for reflecting light emitted from the light emitting region. The reflectivity difference exists between the first optical colloid and the second optical colloid, and the reflectivity of the second optical colloid is larger than that of the first optical colloid.
In one embodiment, the present invention further provides a display device, which has a structure as shown in fig. 7, and includes an LED surface light source 100, an optical film 200, and a liquid crystal panel 300, wherein the optical film 200 and the liquid crystal panel 300 are sequentially located above the LED surface light source 100, and the LED surface light source 100 serves as a backlight source to provide light to the display device; the liquid crystal panel 300 functions as a light valve, and controls the emission of backlight light by cooperating with the optical film 200. The LED surface light source 100 includes a light emitting layer 120 and an LED lamp panel 110, wherein the light emitting layer 120 is located on the LED lamp panel 110, the light emitting layer 120 includes LED chips 121, and the LED chips 121 are distributed in an array shape in a light emitting region 111 of the LED lamp panel 110; the reflective wall 130 includes reflective particles 131 and a first transparent plastic substrate 132, the reflective particles 131 are distributed in the first transparent plastic substrate 132, and the reflective wall 130 is closely disposed around the periphery of the light-emitting layer 120, and is used for reflecting and recycling the light emitted from the light-emitting region 111, changing the path of the emitted light, preventing the LED light around the light-emitting region 111 from going outward, and ensuring the brightness uniformity of the whole LED surface light source 100.
According to the LED area light source 100 and the display device, the reflection enclosing wall 130 is tightly arranged at the periphery of the light emitting layer 120 in a surrounding mode, the reflection enclosing wall 130 comprises the reflection particles 131 and the first transparent plastic base material 132, the reflection enclosing wall 130 can reflect and recycle light emitted from the light emitting region 111, the path of the emitted light is changed, the LED light around the light emitting region 111 is prevented from outwards running, the brightness uniformity of the whole LED area light source 100 is ensured, and the problem that the brightness of the periphery of the LED lamp panel 110 is lower than that of the center of the LED area light source can be solved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An LED area light source, comprising:
the LED lamp panel comprises a light emitting area;
the light emitting layer comprises an LED chip, and the LED chip is arranged in a light emitting area of the LED lamp panel;
and the reflection enclosing wall comprises reflection particles and a first transparent plastic substrate, wherein the reflection particles are distributed in the first transparent plastic substrate, and the reflection enclosing wall is closely arranged at the periphery of the luminous layer in a surrounding manner and is used for reflecting the light emitted by the deviated luminous zone.
2. An LED area light source as claimed in claim 1, wherein the width of the reflective fence is greater than or equal to 100 nm.
3. The LED area light source as claimed in claim 1, wherein the first transparent plastic substrate has a transparency ranging from 95% to 99%, the reflective particles have a particle size ranging from 0 μm to 200 μm, and the mass ratio of the reflective particles to the first transparent plastic substrate is 5: 100.
4. The LED surface light source according to claim 1, characterized in thatCharacterized in that the reflective particles are metallic or non-metallic optical particles; the metal optical particles comprise any one or combination of Ag, Al, Rh, Cr, Pt, Cu, Au and Ti particles; the non-metallic optical particles comprise nanoscale TiO2、ZnO、BaSO4、Al2O3Any one or combination of particles.
5. An LED area light source as claimed in claim 1, wherein an adhesion promoter is disposed between the reflective wall and the LED lamp panel for closely surrounding the reflective wall to the periphery of the luminescent layer.
6. The LED area light source of claim 1, wherein the number of the LED chips is two or more, the LED chips are distributed in the light emitting area of the LED lamp panel in an array manner, optical colloids are filled among the LED chips, the optical colloids comprise optical particles and a second transparent plastic substrate, and the optical particles are distributed in the second transparent plastic substrate and used for refracting and/or reflecting light emitted by the LED chips, so that the brightness of the light emitting layer is uniform.
7. The LED area light source of claim 6, wherein the height of the reflective fence is greater than or equal to the height of the optical colloid.
8. The LED area light source of claim 6, wherein the optical particles are plastic particles, the second transparent plastic substrate has a transparency ranging from 95% to 99%, the optical particles have a particle size ranging from 5 μm to 20 μm, and the mass ratio of the reflective particles to the first transparent plastic substrate is 25% to 35%.
9. An LED area light source, comprising:
the LED lamp panel comprises a light emitting area and an edge area, and the edge area surrounds the light emitting area;
the LED chip is arranged in the light emitting area;
the first optical colloid is coated on the light emitting region and filled between the LED chips; and
and the second optical colloid comprises reflective particles and a first transparent plastic substrate, the reflective particles are distributed in the first transparent plastic substrate, and the second optical colloid is coated on the edge region and surrounds the LED chip and is used for reflecting light emitted from the light emitting region.
10. A display device comprising a liquid crystal panel, an optical film, and the LED surface light source according to any one of claims 1 to 8, wherein the optical film and the liquid crystal panel are disposed in this order above the LED surface light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031345.9A CN111211211A (en) | 2020-01-13 | 2020-01-13 | LED area light source and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010031345.9A CN111211211A (en) | 2020-01-13 | 2020-01-13 | LED area light source and display device |
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| CN111211211A true CN111211211A (en) | 2020-05-29 |
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| CN202010031345.9A Pending CN111211211A (en) | 2020-01-13 | 2020-01-13 | LED area light source and display device |
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