CN203375262U - White light LED preventing surface from being scraped - Google Patents
White light LED preventing surface from being scraped Download PDFInfo
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- CN203375262U CN203375262U CN201320310946.9U CN201320310946U CN203375262U CN 203375262 U CN203375262 U CN 203375262U CN 201320310946 U CN201320310946 U CN 201320310946U CN 203375262 U CN203375262 U CN 203375262U
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- led
- circuit
- drive circuit
- led drive
- white light
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Abstract
The utility model provides a white light LED preventing surface from being scraped. The LED comprises an LED luminophor, an LED drive circuit and a resin protection layer. The LED luminophor is located on the LED drive circuit, the resin protection layer surrounds the LED luminophor, and the LED luminophor is fixed to the LED drive circuit through an injection molding method. The LED drive circuit comprises a boundary boosting type power factor correction circuit, an active clamp forward converter and a high-low limiting constant current pulse width modulation dimming circuit which are connected in sequence. An LCD backlight module serves as an application background, light-emitting characteristics of the LED are analyzed, and current control is pointed out to serve as the best mode for LED luminance control. In order to obtain higher light-emitting efficiency and a higher dimming effect, the LED driving dimming circuit of a three-level structure is designed. As is shown in an experiment, the LED drive circuit is utilized, so not only can the power factor of a system be improved, but also the drifting of the dominant wave length of the LED and the drifting of chromaticity coordinates can be both reduced, and the brightness of the LED is effectively controlled.
Description
Technical field
The utility model relates to Display Technique field, LED-backlit source, more specifically, relates to a kind of anti-surperficial scratch type white light LEDs equipment.
Background technology
At present traditional along with social progress and the development of technology, the display device that the characteristics such as the display device of LED (light-emittingdiode Light Emitting Diode) backlight is high with its reliability, long service life, adaptive capacity to environment is strong, cost performance is reasonable, use cost is low substitute traditional C CFL (cathode fluorescent tube Cold CathodeFluorescent Lamp) backlight gradually becomes rapidly the main product that large flat shows, in field of information display, is widely used.The huge market demand impels liquid crystal panel manufacturer and national governments' activity investment to set up LED product line of new generation, in this case, meets 55 inches and following liquid crystal panel 8.5 generation production line and builds like the mushrooms after rain.When various countries actively build 8.5 generation lines, with leading panel vendors such as Korea S's Samsung and Japanese Sharps, especially actively to higher line generation---can meet the 10 generations line investment of 65 inches and above application such as HDTV, exhibition room display and billboard.
The backing structure of 55 inches of traditional LED-backlit source and following display device generally has following two kinds:
1, downward back photo structure
Although on principle, LED array can be made infinity, but the existence due to air layer d, increased undoubtedly the thickness of whole display, because needing a large number of LED, this class display does support simultaneously, also increased from another point of view the energy consumption of display, be unfavorable for the reduction of display use cost, therefore this backing structure can't be made superhuge display device.
2, side entrance back structure
But because current LED brightness range is limit, the LGP width also must be restricted, and because this type of designs the periphery that the LED luminescence unit is positioned at display, therefore be difficult to fundamentally improve the dynamic contrast of whole display, thereby make this backing structure can't make superhuge display device equally.
Thus, need a kind of LED of design can accomplish 65 inches even larger display devices as backlight, size, and if this display device meet the performance requirement of low cost, low energy consumption, high brightness and contrast.
The utility model content
For the problems referred to above; the utility model provides anti-surperficial scratch type white light LEDs; it is characterized in that: described LED comprises LED illuminator 1; LED drive circuit 3; resin protective layer 2; described LED illuminator 1 is positioned on LED drive circuit 3, and resin protective layer 2, around LED illuminator 1, is fixed in LED illuminator 1 on LED drive circuit 3 by the injection moulding mode.Described LED drive circuit comprises connection in turn: Boundary-Type step-up type power factor correction circuit, active clamping forward converter, the spacing constant current pulsewidth modulation of height drive light adjusting circuit.
The technique scheme of utilizing the utility model to provide, display device can be accomplished to infinity, ultra-thin in theory, and the LED-backlit source display device brightness of manufacturing according to the utility model is high, cost is low, dynamic contrast to, energy-conservation, the utility model adopts LED as backlight, go for 65 inches and above liquid crystal display, can be widely used in the display device that HDTV, showroom display and billboard etc. need fine definition, giant-screen.
The accompanying drawing explanation
Describe in more detail exemplary embodiment of the present utility model by the reference accompanying drawing, above and other aspect of the present utility model and advantage will become and more be readily clear of, in the accompanying drawings:
Fig. 1 is anti-surperficial scratch type white light LEDs cross-sectional view of the present utility model.
Fig. 2 is anti-surperficial scratch type White LED Drive functional-block diagram of the present utility model;
The circuit theory diagrams that Fig. 3 is Boundary-Type step-up type power factor correction circuit in anti-surperficial scratch type White LED Drive of the present utility model;
The circuit theory diagrams that Fig. 4 is active clamping forward converter in anti-surperficial scratch type White LED Drive of the present utility model;
Fig. 5 is the circuit theory diagrams that in anti-surperficial scratch type White LED Drive of the present utility model, the spacing constant current pulsewidth modulation of height drives light adjusting circuit.
The specific embodiment
Hereinafter, now with reference to accompanying drawing, the utility model is described more fully, various embodiment shown in the drawings.Yet the utility model can be implemented in many different forms, and should not be interpreted as being confined to embodiment set forth herein.On the contrary, it will be thorough with completely providing these embodiment to make the disclosure, and scope of the present utility model is conveyed to those skilled in the art fully.
Hereinafter, exemplary embodiment of the present utility model is described with reference to the accompanying drawings in more detail.
With reference to accompanying drawing 1; Fig. 1 is anti-surperficial scratch type white light LEDs cross-sectional view of the present utility model; described LED comprises LED illuminator 1; LED drive circuit 3; resin protective layer 2; described LED illuminator 1 is positioned on LED drive circuit 3, and resin protective layer 2, around LED illuminator 1, is fixed in LED illuminator 1 on LED drive circuit 3 by the injection moulding mode.As Fig. 2 is as shown in anti-surperficial scratch type White LED Drive functional-block diagram of the present utility model, described LED drive circuit comprises in turn and to connect: Boundary-Type step-up type power factor correction circuit, active clamping forward converter, the spacing constant current pulsewidth modulation of height drive light adjusting circuit.
The circuit theory diagrams that Fig. 3 is Boundary-Type step-up type power factor correction circuit in anti-surperficial scratch type White LED Drive of the present utility model; The electric main of input, after the full bridge rectifier rectification, obtains and inputs the sine voltage signal of synchronizeing with the form of electric resistance partial pressure; The feedback signal of output voltage after error amplifier therewith sine wave signal in multiplier, multiply each other, obtain sinusoidal reference signal, as the foundation of switch deadline; During switch conduction, inductive current rises, and current sense resistance is compared the inductor current signal of acquisition with sinusoidal wave reference voltage, switch cut-off when inductor current signal equals sinusoidal reference signal; After the switch cut-off, inductance starts to release energy, and now the auxiliary winding of inductance starts the zero current detecting, and when inductive current reduces to zero, the zero current circuit for detecting triggers flip-flop, and switch is conducting again, starts next cycle.
The circuit theory diagrams that Fig. 4 is active clamping forward converter in anti-surperficial scratch type White LED Drive of the present utility model; In transformer one side, main switch, auxiliary switch, clamping capacitance, resonant inductance are arranged, formed by two diodes, outputting inductance, output capacitance, loads in Circuit Fault on Secondary Transformer.Wherein main switch and auxiliary switch are MOSFETS, and resonant inductance equals outer coilloading and transformer primary side leakage inductance sum.
Fig. 5 is the circuit theory diagrams that in anti-surperficial scratch type White LED Drive of the present utility model, the spacing constant current pulsewidth modulation of height drives light adjusting circuit.This circuit drives control integration circuit and light adjusting circuit to form by main switch, current transformer, current-limiting resistance, fly-wheel diode, energy storage inductor, light emitting diode module, output capacitance, flow control resistance, PWM.
The foregoing is only embodiment of the present utility model, be not limited to the utility model.The utility model can have various suitable changes and variation.All any modifications of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model within spirit of the present utility model and principle.
Claims (3)
1. prevent surperficial scratch type white light LEDs, it is characterized in that:
Described LED comprises the LED illuminator; LED drive circuit; resin protective layer; described LED luminous body position is on LED drive circuit; resin protective layer is around the LED illuminator; by the injection moulding mode, the LED illuminator is fixed on LED drive circuit, described LED drive circuit comprises in turn and to connect: Boundary-Type step-up type power factor correction circuit, active clamping forward converter, the spacing constant current pulsewidth modulation of height drive light adjusting circuit.
2. anti-surperficial scratch type white light LEDs as claimed in claim 1 is characterized in that:
Described active clamping forward converter structure is as follows: in transformer one side, main switch, auxiliary switch, clamping capacitance, resonant inductance are arranged, be comprised of two diodes, outputting inductance, output capacitance, loads in Circuit Fault on Secondary Transformer; Wherein main switch and auxiliary switch are MOSFETS, and resonant inductance equals outer coilloading and transformer primary side leakage inductance sum.
3. anti-surperficial scratch type white light LEDs as described as claim 1-2 any one is characterized in that:
The spacing constant current pulsewidth modulation of described height drives light adjusting circuit to drive control integration circuit and light adjusting circuit to form by main switch, current transformer, current-limiting resistance, fly-wheel diode, energy storage inductor, light emitting diode module, output capacitance, flow control resistance, PWM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320310946.9U CN203375262U (en) | 2013-05-31 | 2013-05-31 | White light LED preventing surface from being scraped |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320310946.9U CN203375262U (en) | 2013-05-31 | 2013-05-31 | White light LED preventing surface from being scraped |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203375262U true CN203375262U (en) | 2014-01-01 |
Family
ID=49837789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320310946.9U Expired - Lifetime CN203375262U (en) | 2013-05-31 | 2013-05-31 | White light LED preventing surface from being scraped |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203375262U (en) |
-
2013
- 2013-05-31 CN CN201320310946.9U patent/CN203375262U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 518105 Guangdong city of Shenzhen province Baoan District Songgang Tantou community Furong Road No. 9 building 201 room A Patentee after: SHENZHEN SUIJING OPTOELECTRONICS Co.,Ltd. Address before: 518000, first, third, fourth, 5 and 7, Huang Tian Yang Industrial Zone, Xixiang street, Shenzhen, Guangdong, Baoan District Patentee before: SHENZHEN SUIJING OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |