CN103165590B - Light-emitting diode and direct-light-type backlight - Google Patents
Light-emitting diode and direct-light-type backlight Download PDFInfo
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- CN103165590B CN103165590B CN201110417222.XA CN201110417222A CN103165590B CN 103165590 B CN103165590 B CN 103165590B CN 201110417222 A CN201110417222 A CN 201110417222A CN 103165590 B CN103165590 B CN 103165590B
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- reflector
- light
- emitting diode
- groove
- backlight unit
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Abstract
A kind of light-emitting diode, comprise a substrate, a light-emitting diode chip for backlight unit, first electrode, second electrode, an encapsulated layer and a reflector, a groove offered by this substrate, described reflector is attached on the bottom surface of this groove, this light-emitting diode chip for backlight unit to be placed in this groove and to be positioned at the top in this reflector, the groove that this encapsulated layer is filled in this substrate is interior to cover this reflector and this light-emitting diode chip for backlight unit coated, this reflector comprises first reflector and second reflector, this first reflector is positioned at this groove floor central authorities, this second reflector is looped around the periphery in this first reflector and is connected with the first reflector, the surface in the first reflector is convex surface, the surface in the second reflector is concave surface, this light-emitting diode chip for backlight unit is electrically connected with this first electrode and the second electrode, this light-emitting diode chip for backlight unit has an exiting surface relative with this reflector.The present invention also provides a kind of direct-light-type backlight with this light-emitting diode.
Description
Technical field
The present invention relates to the direct-light-type backlight of a kind of light-emitting diode and a kind of this light-emitting diode of application.
Background technology
Light-emitting diode is a kind of energy-saving and environmental protection, long-life solid light source, and therefore always very active to the research of LED technology in recent ten years, light-emitting diode also has the trend gradually replacing the conventional light source such as fluorescent lamp, incandescent lamp.
The light-emitting diode of prior art generally includes a substrate, reflector, a light-emitting diode chip for backlight unit and an encapsulated layer, reflector is attached to substrate surface, this light-emitting diode chip for backlight unit is positioned at the top in this reflector, this light-emitting diode chip for backlight unit has an exiting surface towards this reflector, and this encapsulated layer covers this reflector and this light-emitting diode chip for backlight unit coated.The light that light-emitting diode chip for backlight unit sends towards reflector, reflector by light reflection to extraneous.But the light intensity of single light-emitting diode side direction emergent light is less, when applying this light-emitting diodes pipe manufacturer backlight, need by multiple light-emitting diode dense ground spread configuration on one panel.Because the quantity of the light-emitting diode used is more, between each light-emitting diode, distance is to each other less, each light-emitting diode operationally produces more heat, because heat accumulation there will be several focus (hotspot) in backlight, if heat distributes not in time, will make that the temperature of light-emitting diode is too high cannot normally work, even be burned.
Summary of the invention
In view of this, be necessary that providing a kind of has the light-emitting diode of stronger side direction bright dipping and apply the direct-light-type backlight of this light-emitting diode.
A kind of light-emitting diode, comprise a substrate, a light-emitting diode chip for backlight unit, first electrode, second electrode, an encapsulated layer and a reflector, a groove offered by this substrate, described reflector is attached on the bottom surface of this groove, this light-emitting diode chip for backlight unit to be placed in this groove and to be positioned at the top in this reflector, the groove that this encapsulated layer is filled in this substrate is interior to cover this reflector and this light-emitting diode chip for backlight unit coated, this reflector comprises first reflector and second reflector, this first reflector is positioned at this groove floor central authorities, this second reflector is looped around the periphery in this first reflector and is connected with the first reflector, the surface in the first reflector is towards the convex surface of this light-emitting diode chip for backlight unit projection, the surface in the second reflector is concave surface, this light-emitting diode chip for backlight unit is electrically connected with this first electrode and the second electrode, this light-emitting diode chip for backlight unit has an exiting surface relative with this reflector.
A kind of direct-light-type backlight applying above-mentioned light-emitting diode, comprise a backboard, multiple above-mentioned light-emitting diode, a framework being placed in an optics module above this backboard and being around in around this backboard, the plurality of light-emitting diode compartment of terrain is arranged on this backboard, and the light sent from light-emitting diode outwards penetrates through this optics module.
Surface due to the first reflector is that convex surface has disperse function to light, more incident ray can by the direction of the first reflective layer reflects to light-emitting diode chip for backlight unit both sides, make the light intensity of light-emitting diode chip for backlight unit both sides comparatively large, light-emitting diode has stronger lateral light.In above-mentioned direct-light-type backlight, because single light-emitting diode has stronger lateral light, distance between each light-emitting diode can arrange comparatively large, has both decreased the quantity of the light-emitting diode of use, and can prevent again heat from accumulating in direct-light-type backlight and be beneficial to timely heat radiation.
Accompanying drawing explanation
Fig. 1 is the cutaway view of the light-emitting diode of a preferred embodiment of the present invention.
Fig. 2 is the vertical view corresponding with the light-emitting diode in Fig. 1.
Index path when Fig. 3 is the LED operation in Fig. 1.
Figure 4 shows that the coordinate diagram of relation between the angle of emergence of the light-emitting diode emergent light in reflection Fig. 1 and light intensity.
Fig. 5 is the cross-sectional schematic of the direct-light-type backlight of light-emitting diode in an application drawing 1.
Main element symbol description
| Substrate | 10 |
| Groove | 101 |
| Light-emitting diode | 100 |
| Light-emitting diode chip for backlight unit | 11 |
| First connector | 12 |
| Second connector | 12a |
| Encapsulated layer | 14 |
| Reflector | 15 |
| First reflector | 151 |
| Second reflector | 152 |
| 3rd reflector | 153 |
| First electrode | 13 |
| Second electrode | 13a |
| First paragraph | 132 |
| Second segment | 133 |
| Fluorescent material | 170 |
| Direct-light-type backlight | 200 |
| Backboard | 20 |
| Optics module | 22 |
| Diffuser plate | 222 |
| First brightness enhancement film | 224 |
| Second brightness enhancement film | 226 |
| Framework | 24 |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Be the light-emitting diode of a preferred embodiment of the present invention as shown in Figures 1 and 2, this light-emitting diode 100 comprises a substrate 10, light-emitting diode chip for backlight unit 11, first, second connector 12,12a, first, second electrode 13,13a, an encapsulated layer 14 and a reflector 15.
A groove 101 offered by this substrate 10.The bottom surface of this groove 101 is provided with one deck reflecting material, forms described reflector 15.This reflector 15 comprises first reflector 151 being positioned at these groove 101 bottom surface central authorities, the periphery being looped around the first reflector 151 second reflector 152 be connected with the first reflector 151 and the periphery that is looped around the second reflector 152 and the 3rd reflector 153 be connected with the second reflector 152.The surface in the first reflector 152, reflector 151, second and the 3rd reflector 153 is cambered surface.The surface in the first reflector 151 is towards the convex surface of this light-emitting diode chip for backlight unit 11 projection, and the surface in the second reflector 152 and the 3rd reflector 153 is concave surface.The curvature in the second reflector 152 is less than the curvature in the 3rd reflector 153.The degree of depth D1 of the second reflector 152 in this groove 101 is not less than the degree of depth D2 of the 3rd reflector 153 in this groove 101.The degree of depth D1 of the second reflector 152 in this groove 101 reduces gradually from the direction away from the first reflector 151, and the degree of depth D2 of the 3rd reflector 153 in this groove 101 reduces gradually from the direction away from the second reflector 152.In the junction in the second reflector 152 and the 3rd reflector 153, the degree of depth D1 of the second reflector 152 in this groove 101 has minimum value, and the degree of depth D2 of the 3rd reflector 153 in this groove 101 has maximum.
First, second electrode 13 described, 13a are arranged on the upper surface of this substrate 10.Each in first, second electrode 13,13a comprises the first paragraph 132 of a wider width and a narrower second segment 133.It is outer and be positioned at the opposite end of this substrate 10 that the first paragraph 132 of first, second electrode 13,13a is arranged on groove 101.The second segment 133 of first, second electrode 13,13a extends to the middle position of the opening of this groove 101 from first paragraph 132, be spaced.First, second connector 12 above-mentioned, 12a conduction is connected to the lower surface of end of second segment 133 of first, second electrode 13,13a.The width of second segment 133 is less than the width of first paragraph 132, with the light reducing first, second electrode 13,13a disturbs light-emitting diode chip for backlight unit 11 to send as far as possible.
This light-emitting diode chip for backlight unit 11 is placed in this groove 101, and is positioned at the central authorities of the opening of this groove 101.This light-emitting diode chip for backlight unit 11 and this reflector 15 are separately.This light-emitting diode chip for backlight unit 11 has an exiting surface, and the exiting surface of this light-emitting diode chip for backlight unit 11 is towards this reflector 15.This light-emitting diode chip for backlight unit 11 is not arranged on the focal position place on the surface in the second reflector 152, with the light avoiding this light-emitting diode chip for backlight unit 11 to cover outgoing.Two electrodes of this light-emitting diode chip for backlight unit 11 conduct electricity be connected with first, second connector 12 above-mentioned, 12a respectively.
This encapsulated layer 14 is filled in the groove 101 of this substrate 10 for light-transmitting materials, this encapsulated layer 14 this light-emitting diode chip for backlight unit 11 coated and first, second connector 12,12a, the exiting surface of this encapsulated layer 14 and the upper surface flush of substrate 10.Alternatively, can be such as near the exiting surface of encapsulated layer 14, mix fluorescent material 170, to change the wavelength of emergent light in this encapsulated layer 14.
As shown in Figure 3, a part of light that light-emitting diode chip for backlight unit 11 sends reflexes to the external world by the first reflector 151, and a part of light reflexes to the external world by the second reflector 152, and a part of light reflexes to the external world by the 3rd reflector 153.
Figure 4 shows that the coordinate diagram of relation between the angle of emergence of this light-emitting diode 100 emergent light of reflection and light intensity.Surface due to the first reflector 151 is that convex surface has disperse function to light, and the incident light of a part can be reflected direction to light-emitting diode chip for backlight unit 11 both sides by the first reflector 151; Again because the curvature in the 3rd reflector 153 is greater than the curvature in the second reflector 152, the more light reflection that light-emitting diode chip for backlight unit 11 sends by the 3rd reflector 153 is to the direction of light-emitting diode chip for backlight unit 11 both sides, the light intensity of light-emitting diode 100 emergent light is made to be for maximum near 60 degree in the angle of emergence, also namely the light intensity of light-emitting diode chip for backlight unit 11 both sides is maximum, and light-emitting diode 100 has stronger lateral light.
Figure 5 shows that a schematic diagram adopting the direct-light-type backlight 200 of above-mentioned light-emitting diode 100.This direct-light-type backlight 200 comprises a backboard 20, the spaced multiple light-emitting diodes 100 be arranged on this backboard 20, a framework 24 being placed in an optics module 22 above this light-emitting diode 100 and being around in around this backboard 20.
This optics module 22 comprises a diffuser plate 222, first brightness enhancement film 224 and second brightness enhancement film 226.The equalizing light rays that multiple light-emitting diode 100 can send by this diffuser plate 222, homogenizing light can be concentrated as specific angle penetrates by this first brightness enhancement film 224 and the second brightness enhancement film 226.
In above-mentioned direct-light-type backlight 200, because single light-emitting diode 100 has stronger lateral light, distance d between each light-emitting diode 100 can arrange larger, both the quantity of the light-emitting diode 100 of use had been decreased, can prevent again heat from accumulating in direct-light-type backlight 200, be beneficial to timely heat radiation.
Claims (8)
1. a light-emitting diode, comprise a substrate, a light-emitting diode chip for backlight unit, first electrode, second electrode, an encapsulated layer and a reflector, it is characterized in that: a groove offered by this substrate, described reflector is attached on the bottom surface of this groove, this light-emitting diode chip for backlight unit to be placed in this groove and to be positioned at the top in this reflector, the groove that this encapsulated layer is filled in this substrate is interior to cover this reflector and this light-emitting diode chip for backlight unit coated, this reflector comprises first reflector and second reflector, this first reflector is positioned at this groove floor central authorities, this second reflector is looped around the periphery in this first reflector and is connected with this first reflector, this the second reflector degree of depth in this groove reduces gradually from the direction away from this first reflector, this first reflector is protruding towards this light-emitting diode chip for backlight unit, the surface in this second reflector is concave surface, this light-emitting diode chip for backlight unit is electrically connected with this first electrode and the second electrode, this light-emitting diode chip for backlight unit has an exiting surface towards this reflector.
2. light-emitting diode as claimed in claim 1, is characterized in that: this light-emitting diode chip for backlight unit departs from the focal position on the surface in the second reflector.
3. light-emitting diode as claimed in claim 1, it is characterized in that: this reflector also comprises the 3rd reflector, 3rd reflector is looped around the periphery in this second reflector and is connected with the second reflector, the surface in this second reflector and the 3rd reflector is concave surface, and the curvature in this second reflector is less than the curvature in the 3rd reflector.
4. light-emitting diode as claimed in claim 3, is characterized in that: this second reflector degree of depth in this groove is more than or equal to the 3rd degree of depth of reflector in this groove.
5. light-emitting diode as claimed in claim 4, is characterized in that: the 3rd degree of depth of reflector in this groove reduces gradually from the direction away from this second reflector.
6. light-emitting diode as claimed in claim 5, is characterized in that: in the junction in this second reflector and the 3rd reflector, this second reflector degree of depth in this groove has minimum value, and the 3rd degree of depth of reflector in this groove has maximum.
7. light-emitting diode as claimed in claim 1, is characterized in that: this light-emitting diode chip for backlight unit and this reflector are separately.
8. a direct-light-type backlight, comprise a backboard and be placed in an optics module above this backboard, it is characterized in that: this direct-light-type backlight also comprises multiple light-emitting diode as described in any one of claim 1-7, the plurality of light-emitting diode compartment of terrain is arranged on this backboard, and the light sent from light-emitting diode outwards penetrates through this optics module.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110417222.XA CN103165590B (en) | 2011-12-14 | 2011-12-14 | Light-emitting diode and direct-light-type backlight |
| TW100147075A TW201324866A (en) | 2011-12-14 | 2011-12-19 | LED and direct type backlight source using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110417222.XA CN103165590B (en) | 2011-12-14 | 2011-12-14 | Light-emitting diode and direct-light-type backlight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103165590A CN103165590A (en) | 2013-06-19 |
| CN103165590B true CN103165590B (en) | 2015-11-25 |
Family
ID=48588547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110417222.XA Active CN103165590B (en) | 2011-12-14 | 2011-12-14 | Light-emitting diode and direct-light-type backlight |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103165590B (en) |
| TW (1) | TW201324866A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3099973B1 (en) * | 2014-05-20 | 2017-05-03 | Philips Lighting Holding B.V. | Conformal coated lighting or lumination system |
| CN116544262B (en) * | 2023-06-09 | 2023-10-20 | 盐城鸿石智能科技有限公司 | Micro LED display panel with high light emitting utilization rate and preparation method thereof |
| CN117038818A (en) * | 2023-10-08 | 2023-11-10 | 盐城鸿石智能科技有限公司 | High-reflection micro LED and preparation method thereof |
-
2011
- 2011-12-14 CN CN201110417222.XA patent/CN103165590B/en active Active
- 2011-12-19 TW TW100147075A patent/TW201324866A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| TW201324866A (en) | 2013-06-16 |
| CN103165590A (en) | 2013-06-19 |
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