CN213581666U - Novel light-emitting device and backlight module - Google Patents
Novel light-emitting device and backlight module Download PDFInfo
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- CN213581666U CN213581666U CN202021398096.9U CN202021398096U CN213581666U CN 213581666 U CN213581666 U CN 213581666U CN 202021398096 U CN202021398096 U CN 202021398096U CN 213581666 U CN213581666 U CN 213581666U
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- silica gel
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- 239000010410 layer Substances 0.000 claims abstract description 50
- 239000000741 silica gel Substances 0.000 claims abstract description 49
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 49
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 48
- 239000011241 protective layer Substances 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 13
- 239000002096 quantum dot Substances 0.000 claims description 5
- 239000012788 optical film Substances 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 20
- 239000010408 film Substances 0.000 description 14
- 239000004408 titanium dioxide Substances 0.000 description 10
- 239000000843 powder Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 239000011324 bead Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 108010025899 gelatin film Proteins 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The utility model provides a novel illuminator and backlight unit, wherein, include in the novel illuminator: flip-chip LED chip; the silica gel protective layer is arranged on the light-emitting side surface of the flip LED chip; the light emitting layer is arranged on the surface of the silica gel protective layer on the light emitting side surface opposite to the electrode side surface in the flip LED chip and comprises light reflection particles for reflecting part of light emitted from the light emitting side surface; and the light reflecting layer is arranged on the side surface of the electrode of the flip LED chip and is used for reflecting the light emitted from the side surface of the electrode. The light-emitting layer arranged on the surface of the silica gel protective layer on the light-emitting side opposite to the electrode side surface in the flip LED chip reflects part of light emitted from the light-emitting side surface back to be emitted through the side surface, so that the light-emitting angle of the whole novel light-emitting device is increased (170 degrees) and the requirement for the light-emitting angle of the novel light-emitting device in a direct type backlight scene is met.
Description
Technical Field
The utility model belongs to the technical field of the semiconductor technology and specifically relates to a novel light-emitting device and backlight unit.
Background
With the rapid development of display technology, people have higher and higher demands on displays, and LED backlight displays are widely applied. The LED backlight display is characterized in that the LED backlight display on the market is divided into a side-in type and a direct type, wherein the side-in type is that LED lamp beads of the backlight module are arranged around the liquid crystal screen in a string mode, the direct type is that the LED lamp beads of the backlight module are arranged on the front back surface of the liquid crystal screen in a string mode, and light of the LED lamp beads uniformly enters the light guide plate after passing through the lens to form a surface light source. Although the direct type backlight display is low in cost, it may result in an increase in thickness of the display. How to reduce the thickness of the display while achieving cost reduction becomes a problem to be solved.
In the application of straight following formula is shaded, all have the requirement to the thickness and the luminous angle of LED lamp pearl, however adopt the LED lamp pearl luminous angle that current mode encapsulation LED chip obtained between 120 ~ 150, and need cooperate the lens light-emitting, can not satisfy straight following formula demand that is shaded.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above insufficiency, the utility model provides a novel illuminator and backlight unit effectively solves the problem that current LED lamp pearl luminous angle is less and need be equipped with lens.
The utility model provides a technical scheme does:
a novel light emitting device comprising:
flip-chip LED chip;
the silica gel protective layer is arranged on the light-emitting side surface of the flip LED chip;
the light emitting layer is arranged on the surface of the silica gel protective layer on the light emitting side surface opposite to the electrode side surface in the flip LED chip, and comprises light reflection particles for reflecting part of light emitted from the light emitting side surface;
and the light reflecting layer is arranged on the side surface of the electrode of the flip LED chip and is used for reflecting the light emitted from the side surface of the electrode.
The utility model also provides a novel light-emitting device preparation method, include:
forming a light emergent layer containing reflective particles on the surface of the support film;
preparing a first silica gel protective layer on the surface of the light emergent layer;
preparing a second silica gel protective layer with viscosity on the surface of the first silica gel protective layer, wherein the viscosity of the second silica gel protective layer is more than 10000 mpa.s;
arranging a plurality of flip LED chips on the surface of the second silica gel protective layer, and pressing;
curing the second silica gel protective layer after pressing;
preparing a light reflection layer on the side surface of the electrode of the flip LED chip;
and cutting to obtain single novel light-emitting device.
The utility model also provides a backlight module, include:
a base plate;
a plurality of novel light emitting devices arranged on the surface of the bottom plate;
and the quantum dot optical film is fixedly arranged above the light-emitting device.
The utility model provides a novel luminous device and backlight unit can bring following beneficial effect at least:
1. set up the light-emitting layer on the light-emitting side surface relative with the electrode side surface in flip-chip LED chip, return partial light reflection that should light-emitting side surface was emergent through the side outgoing to this increases whole novel illuminator's light-emitting angle (reaches 170 °), satisfies the demand to novel illuminator light-emitting angle in the straight following formula scene of being shaded. In addition, the light emitting layer is realized in a film pasting operation mode, and the height and color point of the novel light emitting device can be accurately controlled.
2. The electrode pad is wrapped up by the light reflecting layer around, can avoid the application end in the back of accomplishing with aluminium base board paster, the loss of LED light in base plate department compares in conventional LED lamp pearl, and the backlight unit luminous flux that is formed by this novel illuminator is higher.
3. Can omit lens among this novel illuminator, save material cost and lens and paste the dress cost, make backlight unit thinner simultaneously, OD distance can reach and is less than 1mm (the OD distance of current lamp pearl is greater than 10mm), further reduces the thickness of TV complete machine.
4. The novel light-emitting device and the quantum dot optical film are matched in the backlight module, so that the color gamut of the backlight module is higher than that of an OLED, the performance of the backlight module is higher than that of the OLED, the price of the backlight module is lower than that of the OLED, and the backlight module is more energy-saving than that of the OLED.
Drawings
Fig. 1 is a schematic structural view of the novel light emitting device of the present invention;
fig. 2 is a view illustrating a light emitting angle of a light emitting device according to an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for manufacturing the novel light emitting device of the present invention.
Reference numerals:
the LED chip comprises a 10-flip chip LED chip, 20-silica gel protection layer, 21-first silica gel protection layer, 22-second silica gel protection layer, 30-light emitting layer, 40-chip electrode, 50-light reflection layer, 60-support film and 70-high temperature film.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain specific embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
As shown in fig. 1, the structure of the novel light emitting device provided by the present invention is schematically illustrated, and as can be seen from the figure, the novel light emitting device includes: flip-chip LED chip 10; a silica gel protective layer 20 disposed on a light-emitting side surface of the flip LED chip 10; the light-emitting layer 30 is arranged on the surface of the silica gel protective layer 20 on the light-emitting side surface opposite to the electrode side surface in the flip LED chip 10, and the light-emitting layer 30 contains light-reflecting particles for reflecting part of light emitted from the light-emitting side surface; and a light reflection layer 50 arranged on the electrode side surface of the flip LED chip for reflecting the light emitted from the electrode side surface.
In the novel light-emitting device, the light-emitting layer 30 is prepared from titanium dioxide powder and silica gel in a certain mass ratio, and the mass ratio of the titanium dioxide powder to the silica gel is 0.1: 1-1: 1. For example, in one example, the mass ratio of titanium dioxide powder to silica gel is 0.2: 1; in another example, the mass ratio of titanium dioxide powder to silica gel is 0.5:1, and so on. In the light emitting layer 30, the titanium dioxide powder and the silica gel are uniformly mixed according to the required proportion, and then coated on a support film (such as a transparent PET support film) for high-temperature curing to form a light emitting layer with the thickness of 10-100 μm. In the light-emitting layer 30, because the light-reflecting particle titanium dioxide is included, part of light emitted from the light-emitting side surface opposite to the electrode side surface in the flip-chip LED chip 10 can be reflected back to exit through the side surface, so that the light-emitting angle of the whole novel light-emitting device is increased, and a lens is not required to be further mounted.
The light reflecting layer 50 is similar to the light emitting layer 30, and is designed to reflect light emitted from the side surface of the electrode (light incident on the substrate) back, so as to avoid light flux loss caused by light absorption of the substrate in the SMT mounting process (for a five-sided light emitting CSP chip, approximately 30% of light is emitted toward the substrate), so that the light reflecting layer can have the same composition as the light emitting layer 30, and can also be adjusted in proportion according to actual conditions.
The silicone protective layer 20 is provided on the other 5 side surfaces excluding the electrode side surface in the flip LED chip 10, and the silicone protective layer 20 is made of silicone. In the preparation process, the first silica gel protective layer 20 is coated on the surface of the light emitting layer 30 and is cured and molded to form a double-layer film structure comprising the light emitting layer 30 and the first silica gel protective layer, and then the second silica gel protective layer with viscosity is prepared on the surface of the first silica gel protective layer, so that the flip LED chip 10 can be pressed in the second silica gel protective layer conveniently. Here, the viscosity is specifically a state where the second silicone protective layer is not completely cured, that is, a state where solid and liquid coexist and the second silicone protective layer cannot flow, and the viscosity of the second silicone protective layer is greater than 10000 mpa.s. In order to ensure that the silica gel does not overflow to the side surface of the electrode after the light is emitted from the chip and the chip is pressed, the thickness of the first silica gel protective layer is 50-100 μm, and the thickness of the second silica gel protective layer is 100-200 μm (smaller than the thickness of the flip LED chip, generally speaking, the thickness of the flip LED chip is 150-250 μm).
In one example, the mass ratio of titanium dioxide powder to silica gel in the light emitting layer and the light reflecting layer is 0.5:1, the thickness of the light emitting layer is 50 μm, the thickness of the light reflecting layer is the same as the height of the chip electrode, and the light emitting angle diagram is shown in fig. 2, and as can be seen from the diagram, the light emitting angle reaches 170 degrees, which is obviously improved compared with the existing LED lamp bead.
The utility model also provides a novel illuminator preparation method, as shown in fig. 3, this novel illuminator preparation method includes following step:
a light-emitting layer 30 containing reflective particles is formed on the surface of the support film 60, as shown in fig. 3 (a). Specifically, titanium dioxide powder and silica gel are prepared according to the required mass ratio (the mass ratio range is 0.1: 1-1: 1) to obtain a mixture, and the preparation of slurry is completed; then, the prepared mixture is coated on a support film 60 (such as a transparent PET support film), and is cured at a high temperature to form a titanium dioxide silica gel film with a thickness of 10-100 μm, namely the light-emitting layer 30.
A first silica gel protection layer 21 is formed on the surface of the light-emitting layer 30, as shown in fig. 3 (b). Specifically, a mixture of silica gel a and silica gel B is coated on the surface of the light-emitting layer 30 and cured to form a double-layer film structure including the light-emitting layer 30 and the first silica gel protective layer 21. The first silica gel protection layer 21 has a thickness of 50 to 100 μm. The proportion of the silica gel A and the silica gel B is adjusted randomly according to actual conditions.
A second silicone protective layer 22 with viscosity is prepared on the surface of the first silicone protective layer 21, and the viscosity of the second silicone protective layer 22 is greater than 10000mpa.s, as shown in fig. 3 (c). Specifically, the mixture formed by the silica gel a and the silica gel B is coated on the surface of the first silica gel protective layer 21 and baked at a low temperature to form a second silica gel protective layer 22 with viscosity, so that the flip-chip LED chip 10 can be pressed in the second silica gel protective layer 22 in a subsequent process. The term "viscous" refers to a state in which the second silicone protective layer 22 is not completely cured, i.e., a state in which solid and liquid coexist and cannot flow, and the viscosity of the second silicone protective layer 22 is greater than 10000mpa.s and the thickness is 100 to 200 μm.
Arranging a plurality of flip LED chips 10 on the surface of the second silica gel protective layer 22, putting the flip LED chips into vacuum pressing equipment for pressing, and completely curing the second silica gel protective layer 22 after pressing. Before the lamination, the support film 60 under the light emitting layer 30 is replaced with a high temperature resistant film 70, as shown in fig. 3 (d).
A light reflecting layer 50 is formed on the electrode-side surface of the flip-chip LED chip, as shown in fig. 3 (e). Specifically, titanium dioxide powder and silica gel are prepared according to the required mass ratio (the mass ratio range is 0.1: 1-1: 1) to obtain a mixture, and then the mixture is coated on the side surface of a chip electrode and cured. Then, the semi-finished product shown in fig. 3(e) is polished and thinned by a grinding wheel or a blade until the pad of the electrode 40 (e.g., copper pillar) is exposed, and a metal layer for soldering (e.g., Ni/Au layer) is plated by electroless plating, as shown in fig. 3 (f).
The entire sheet is cut, and the high temperature film 70 is removed to obtain individual novel light emitting devices, as shown in fig. 3(g) and 3 (h).
The utility model also provides a backlight unit is applied to liquid crystal display devices such as TV set, including bottom plate, arrange in the novel illuminator of many above-mentioned of bottom plate surface and set firmly the quantum dot blooming in the illuminator top in this backlight unit. The number and arrangement of the novel light-emitting devices are set according to actual conditions. By need not use lens among the novel illuminator to this backlight unit is thinner, can satisfy the demand of straight following formula backlight application scene, reduces liquid crystal display device whole thickness. In addition, the backlight module is matched with a quantum dot optical film by using a novel light-emitting device, so that the color gamut of the backlight module is higher than that of an OLED, the performance of the backlight module is higher than that of the OLED, the price of the backlight module is lower than that of the OLED, and the backlight module is more energy-saving than that of the OLED.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A novel light emitting device, comprising:
flip-chip LED chip;
the silica gel protective layer is arranged on the light-emitting side surface of the flip LED chip;
the light emitting layer is arranged on the surface of the silica gel protective layer on the light emitting side surface opposite to the electrode side surface in the flip LED chip, and comprises light reflection particles for reflecting part of light emitted from the light emitting side surface;
and the light reflecting layer is arranged on the side surface of the electrode of the flip LED chip and is used for reflecting the light emitted from the side surface of the electrode.
2. A novel light-emitting device according to claim 1, wherein the light-emitting layer has a thickness of 10 to 100 μm.
3. The novel light-emitting device according to claim 1, wherein the thickness of the silicone protective layer on the light-emitting side surface opposite to the electrode side surface in the flip-chip LED chip is 50 to 100 μm.
4. The novel light emitting device of claim 1, wherein the thickness of the silicone protective layer of the phosphor layer on the side of the flip-chip LED chip is less than the thickness of the flip-chip LED chip.
5. A backlight module, comprising:
a base plate;
a plurality of novel light emitting devices according to any one of claims 1 to 4 arranged on the surface of the base plate;
and the quantum dot optical film is fixedly arranged above the light-emitting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021398096.9U CN213581666U (en) | 2020-07-16 | 2020-07-16 | Novel light-emitting device and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021398096.9U CN213581666U (en) | 2020-07-16 | 2020-07-16 | Novel light-emitting device and backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213581666U true CN213581666U (en) | 2021-06-29 |
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|---|---|---|---|
| CN202021398096.9U Active CN213581666U (en) | 2020-07-16 | 2020-07-16 | Novel light-emitting device and backlight module |
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| CN (1) | CN213581666U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462554A (en) * | 2020-07-16 | 2021-03-09 | 江西省晶能半导体有限公司 | Novel light-emitting device, preparation method thereof and backlight module |
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2020
- 2020-07-16 CN CN202021398096.9U patent/CN213581666U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112462554A (en) * | 2020-07-16 | 2021-03-09 | 江西省晶能半导体有限公司 | Novel light-emitting device, preparation method thereof and backlight module |
| CN112462554B (en) * | 2020-07-16 | 2024-05-17 | 江西晶亮光电科技协同创新有限公司 | Novel light-emitting device, preparation method thereof and backlight module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240314 Address after: Factory Building 101, No. 699 Aixihu North Road, Nanchang High tech Industrial Development Zone, Nanchang City, Jiangxi Province, 330096 Patentee after: JIANGXI JINGLIANG OPTICAL-ELECTRONIC SCIENCE AND TECHNOLOGY COOPERATIVE INNOVATION Co.,Ltd. Country or region after: China Patentee after: JIANGXI CHANGDA OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 330096 No. 699, Aixi Hubei Road, Nanchang High-tech Development Zone, Jiangxi Province Patentee before: JIANGXI LATTICEPOWER SEMICONDUCTOR Corp. Country or region before: China Patentee before: JIANGXI CHANGDA OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |