CN201496833U

CN201496833U - LED lighting source of projector

Info

Publication number: CN201496833U
Application number: CN2009201661684U
Authority: CN
Inventors: 施清德
Original assignee: XINYI OPTOELECTRONIC (SHENZHEN) CO Ltd
Current assignee: Caiyi Technology (Shenzhen) Inc.
Priority date: 2009-07-17
Filing date: 2009-07-17
Publication date: 2010-06-02
Anticipated expiration: 2019-07-17

Abstract

The utility model discloses a an LED lighting source of a projector, which comprises an LED light source (1), a condenser (2), a support (3) and radiating fins (4), wherein the LED light source (1) is formed by integrating a red LED chip (11), a blue LED chip (12) and a green LED chip (13) on an aluminum base board (14); the light emerging surfaces of the LED chips (11, 12, 13) are respectively provided with an optical glass; the support (3) is provided with light collecting apertures (31); the condenser (2) is embedded in the light collecting apertures (31); the LED chips (11, 12, 13) of the LED light source (1) are positioned on the focus of the condenser (2); and the radiating fins (4) are arranged on the back of the aluminum base board (14) of the LED light source (1). The LED lighting source has the advantages of low cost, high brightness, compact structure and good radiating property.

Description

The LED of projector lighting source

Technical field

The utility model relates to field of projection display, particularly a kind of LED projector light source lighting and heat abstractor thereof.

Background technology

At present, Projection Display has become a kind of very effective means that colored big picture shows that solve, and light-source illuminating system is as the important component part of projection optical system, and the performance of optical projection system, life-span, volume etc. are had significant effects.LED (Light Emitting Diode) is as a kind of novel lighting source, begun to be applied to field of projection display, it utilizes the solid semiconductor chip as luminescent material, when two ends add forward voltage, carrier in the semiconductor takes place compound, emits excess energy and causes that photo emissions produces visible light.Compare with traditional UHP (ultra-high pressure gas discharge lamp) lighting source, LED has following advantage: the one, and compact conformation, volume are little.LED can directly send R, G, three kinds of primary lights of B and realize the separately fast break-make of three kinds of primary lights that (promptly three kinds of primary lights are luminous in turn chronologically, timesharing arrives optical projection system fast), need not just can be applicable to projector through complicated and accurate colour wheel (Color Wheel) beam splitting system, simplified projector light channel structure, saved the light engine space, help realizing miniaturization, lightweight and the cost degradation of optical projection system.The 2nd, energy-conservation, reliable.LED is the cold light source of real meaning, can not produce a large amount of heats in the course of work, and the heat radiation that has reduced projector requires, saved the energy.And the intrinsic ultraviolet light of LED non-radiating UHP lamp causes that the infrared light of heating is relatively also much smaller, helps the safety of the image-forming component of protective price costliness, has improved the reliability of complete machine.Because the reduction of power consumption, the LED light engine can utilize battery to drive, and meets the developing direction of portable translucent machine.The 3rd, the life-span is long.LED is the solid luminescence device, its average life span is 50,000～100,000 hour, far above high-pressure mercury-vapor lamp common 10,000 hour service life, can contain the whole life that projector uses, replacing bulb and the use cost having avoided certainly leading in the use of UHP projector increase problem.The 4th, the accurate control of color.Because all by independent accurately control, any color is unbalance all can be revised easily in real time for redness, green and blue led, controls thereby realize stablizing accurate color.

Because LED has above-mentioned plurality of advantages, LED shadow casting technique has obtained numerous manufacturers and consumer's favor, makes to reduce projector's appearance and size significantly and become possibility, will lead the developing direction of following minitype projection machine and embedded projector.

Summary of the invention

The utility model overcomes above-mentioned shortcoming, provides a kind of compact conformation, brightness height, good heat dissipation effect, the LED of projector lighting source that cost is low to society.

This device comprises led light source, condenser, support, fin and clip.This led light source is that red, green, blue three-primary color LED chip is integrated on the aluminium base, compact arrangement becomes rectangular configuration or Chinese character pin-shaped structure, the chip gap is between 0.01mm ~ 0.2mm, require under the prerequisite in electric clearance and the heat radiation of satisfying necessity between the chip, the closeness of the raising led chip of maximum possible, reduce the led light source area, realize the high density of light and the compactness of high brightness and structure.The heat that led chip produces is transmitted to fin and is dispersed into surrounding environment by the aluminium base at the back side, guarantees that chip operation is under suitable temperature.The light exit surface of led chip is packaged with one deck optical glass (or optical resin); three coloured light that LED sends enter condenser through optical glass and converge; the optical glass of encapsulation plays fixing and protective effect to chip on the one hand; improved the heat resistance of encapsulation on the other hand; thereby configuring chip is thick and fast realized the high density and the high brightness of light.8 electrical leads, the one end soldering of led light source is arranged on the aluminium base, and the other end connects binding post, and the pcb board that this binding post can be connected in projector provides electric energy for LED.

This support top is provided with the LED aluminium base heavy stand, LED light harvesting hole, fin installation brace rod, clip installing hole is installed.The one side that the LED aluminium base is embedded with chip is close on the LED aluminium base installation heavy stand, chip just in time is positioned at center, led chip light harvesting hole.The light transmission optical glass that LED sends directly enters condenser and converges, and a small amount of wide-angle diverging light also enters condenser under the reflex of light harvesting hole surface, improved light utilization efficiency.This aluminium base back side is equipped with fin, and fin and aluminium base contact-making surface scribble the skim heat-conducting cream.The clip that fin and LED aluminium base are installed in the clip installing hole is held on the support, heat-conducting cream penetrates into the slit of fin and aluminium base contact-making surface under the pressure effect of clip, reduced the thermal contact resistance between aluminium base and the fin, the heat that led chip is produced is transmitted to fin fast and is dispersed into surrounding environment by aluminium base.LED, support, fin, clip assembling schematic three dimensional views are as shown in Figure 1.

This condenser can embed top, LED light harvesting hole on the support, the bottom surface of condenser is closely seamless is attached to the back side, LED light harvesting hole, the light transmission optical glass that LED sends directly enters condenser and converges, a small amount of wide-angle diverging light also enters condenser and converges under the reflex of light harvesting hole surface, reduced light loss, improved the utilization rate of light.

The utlity model has following advantage:

1, compact conformation

The utility model adopts LED as lighting source, can directly send R, G, three kinds of primary lights of B, need not just can be applicable to projector through complicated and accurate colour wheel beam splitting system, simplified projector light channel structure, saved the light engine space, help realizing the miniaturization and the lightweight of optical projection system.

2, brightness height

Led light source of the present utility model becomes rectangular configuration or Chinese character pin-shaped structure with redness, blueness and green LED chip compact arrangement, the chip gap is between 0.01mm ~ 0.2mm, require under the prerequisite in electric clearance and the heat radiation of satisfying necessity between the chip, the closeness of the raising led chip of maximum possible, reduce the led light source area, realize the high density and the high brightness of light.

3, perfect heat-dissipating

Led chip of the present utility model is integrated on the aluminium base, the aluminium base back side is equipped with fin, clip tightly is pressed in fin on the aluminium base, aluminium base and fin contact-making surface scribble the thin heat-conducting cream of one deck, heat-conducting cream penetrates into the slit of fin and aluminium base contact-making surface under the pressure effect of clip, reduced the thermal contact resistance between aluminium base and the fin, the heat that led chip is distributed on the aluminium base can be transmitted to fin fast and be dispersed into surrounding environment.

4, cost is low

The utility model adopts LED as lighting source, has reduced the light source cost on the one hand; Then simplify the projector light line structure on the other hand, saved the cost expenditure that is used for beam splitting system.

Description of drawings

Fig. 1 is a kind of embodiment perspective view of the utility model.

Fig. 2 is the sectional structure schematic diagram of Fig. 1.

Fig. 3 is the perspective view of led light source among Fig. 1.

Fig. 4 is the perspective view of condenser among Fig. 1.

Fig. 5 is the perspective view at a kind of visual angle of Fig. 1 medium-height trestle.

Fig. 6 is the perspective view at the another kind of visual angle of Fig. 1 medium-height trestle.

Fig. 7 is the perspective view of fin among Fig. 1.

Fig. 8 is the perspective view of clip among Fig. 1.

Fig. 9 is the arrangement mode schematic diagram of led chip among Fig. 3.

Figure 10 is the perspective view of another kind of led light source.

Figure 11 is the arrangement mode schematic diagram of led chip among Figure 10.

The specific embodiment

See also Fig. 1 to Fig. 9, what the utility model disclosed is a kind of LED of projector lighting source, comprises led light source 1, condenser 2, support 3 and fin 4; Described led light source 1 is red LED chips 11, blue led chip 12 and green LED chip 13 to be integrated on the aluminium base 14 form, and is respectively equipped with optical glass on the light exit surface of led chip 11,12,13; Be provided with light harvesting hole 31 at described support 3, described condenser 2 is embedded on the described light harvesting hole 31, and the led chip 11,12,13 on the described led light source 1 is on the focus of described condenser 2, is provided with fin 4 on the back side of the aluminium base 14 of described led light source 1.Described fin 4 and described aluminium base 14 flexibly connect (obviously, also can be with other connected mode, as with screw rod etc.) by clip 5.Be provided with aluminium base on described support 3 heavy stand 15 is installed, described aluminium base 14 is positioned at described aluminium base heavy stand 15 is installed.Between the contact-making surface of described fin 4 and aluminium base 14, be provided with heat-conducting cream.Described led chip is made up of a red LED chips, a blue led chip and two green LED chips.Gap between the described led chip is between 0.01mm ~ 0.2mm.Four led chips closely are arranged in rectangle, have improved the closeness of led chip greatly, realize the compactness of high density, high brightness and the structure of light.

On described support, be provided with the LED aluminium base heavy stand, LED light harvesting hole, fin installation brace rod, clip installing hole are installed.The one side that the LED aluminium base is embedded with chip is close on the LED aluminium base installation heavy stand, chip just in time is positioned at center, led chip light harvesting hole.The light transmission optical glass that LED sends directly enters condenser and converges, and a small amount of wide-angle diverging light also enters condenser under the reflex of light harvesting hole surface, improved light utilization efficiency.This aluminium base back side is equipped with fin, and fin and aluminium base contact-making surface scribble skim heat-conducting cream or conducting strip.The clip that fin and LED aluminium base are installed in the clip installing hole is held on the support, heat-conducting cream penetrates into the slit of fin and aluminium base contact-making surface under the pressure effect of clip, reduced the thermal contact resistance between aluminium base and the fin, the heat that led chip is produced is transmitted to fin fast and is dispersed into surrounding environment by aluminium base.

See also Figure 10 and Figure 11, Figure 10 is the perspective view of another kind of led light source.From figure as can be known, the LED lamp in this kind led light source is the isosceles triangle layout, as shown in figure 11, also has same technique effect.

It is illustrative that embodiment of the present utility model describes, rather than the scope of restriction claim, and many replacements, modification and change all are clearly to those skilled in the art.

Claims

1. the LED of a projector lighting source is characterized in that: comprise led light source (1), condenser (2), support (3) and fin (4); Described led light source (1) is red LED chips (11), blue led chip (12) and green LED chip (13) to be integrated on the aluminium base (14) form, and is respectively equipped with optical glass on the light exit surface of led chip (11,12,13); Be provided with light harvesting hole (31) at described support (3), described condenser (2) is embedded on the described light harvesting hole (31), led chip on the described led light source (1) (11,12,13) is on the focus of described condenser (2), is provided with fin (4) on the back side of the aluminium base (14) of described led light source (1).

2. the LED of projector lighting source according to claim 1 is characterized in that: described fin (4) flexibly connects by clip (5) with described aluminium base (14).

3. the LED of projector lighting source according to claim 1 is characterized in that: described fin (4) flexibly connects by screw with described aluminium base (14).

4. the LED of projector lighting source according to claim 1 and 2 is characterized in that: be provided with aluminium base on described support (3) heavy stand (15) is installed, described aluminium base (14) is positioned at described aluminium base heavy stand (15) is installed.

5. the LED of projector lighting source according to claim 3 is characterized in that: be provided with heat-conducting cream or conducting strip between the contact-making surface of described fin (4) and aluminium base (14).

6. the LED of projector lighting source according to claim 4 is characterized in that: described led chip is made up of a red LED chips, a blue led chip and two green LED chips, is matrix and arranges.

7. the LED of projector lighting source according to claim 4 is characterized in that: described led chip is made up of a red LED chips, a blue led chip and a green LED chip, is isosceles triangle and arranges.

8. according to claim 6 or the 7 described LED of projector lighting sources, it is characterized in that: the gap between the described led chip is between 0.01mm～0.2mm.