CN201232946Y - Double-lamp module - Google Patents

Abstract

The utility model relates to a double light module which comprises a first light wick, a second light wick, a first light cover, a second light cover and a reflector, wherein the first light wick and the second light wick are used for issuing light; the first light cover and the second light cover are used for reflecting corresponding light; the first light cover and the second light cover are both parabola-shaped revolving bodies; the first light wick and the second light wick are respectively arranged on focuses of the first light cover and the second light cover; the reflector used for issuing the light in parallel mode is arranged between the first light cover and the second light cover; and the largest cross-sectional area of the reflector along the direction vertical with a revolving shaft of each light cover is not less than one half of the opening area of the corresponding light cover. The double light module utilizes the principle that the light issued from a focus of the parabola light cover can be reflected and output in parallel by the light cover, collects the light to a single light source before the light source passes through a lens array, can maintain the design of a lighting system and an imaging system, maintains contrast gradient and imaging quality at the same time, and reduces researching and developing cost and time of a light engine.

Description

Double lamp module

Technical field

The utility model relates to a kind of assembly of optical projection system, more particularly, relates to a kind of double lamp module.

Background technology

Contrast (contrast) is two major criterions weighing projector's effect with brightness (brightness).Therefore in general, the main demand of theater projector of high-order family (Home Theater Projector) is a contrast, often yields the brightness demand, must be under the environment of turning off the light ornamental film; For low order education market and company's row number employed projector, brightness then is its main demand, and often is forced to reduce contrast.In the use occasion that can't effectively intercept surround lighting, improve brightness and seem particularly important.

Traditional single lamp type projector in the market all can not have high brightness and high-contrast concurrently.If will improve brightness, except changing the high power bulb, nothing more than the change optical design.Not only effect is limited to change the high power bulb, and short characteristic of its life-span also is a puzzlement greatly; The change optical design has not only increased the time and the cost of ray machine research and development, and is difficult to keep existing image quality.

Application number is that 200610002543.2 Chinese invention patent application discloses a kind of double-lamp illuminating system, and as shown in Figure 1, this double-lamp illuminating system comprises two lighting modules 1,2, beam deflecting unit 3, and light homogenizer 4.First lighting module 1 comprises that light source 11 and oval lampshade 12, the second lighting modules 2 comprise light source 21 and oval lampshade 22.The light that each light source 11,21 sends is respectively through the reflection of separately oval lampshade 12,22 inwalls, arrive beam deflecting unit 3 surfaces, afterwards again through beam deflecting unit 3 reflections, and converge at light homogenizer 4, at last, light homogenizer 4 becomes parallel rays with the light homogenize, fore optics system.Though this double-lamp illuminating system can improve the brightness of projection image to a certain extent, has following defective: in order to export parallel light, must set up the light homogenizer, increase cost to a certain extent; This double-lamp illuminating system has higher requirement to the positional precision between the form accuracy of beam deflecting unit 3 and it and the light homogenizer 4 in addition.

The utility model content

The technical problems to be solved in the utility model is that the extra defective that adopts the light homogenizer of double-lamp illuminating system needs at prior art provides a kind of double lamp module, can improve the brightness of projector, can reduce extra assembly simultaneously.

The technical scheme that its technical problem that solves the utility model adopts is: construct a kind of double lamp module, comprise: first wick that is used to emit beam and second wick, be used to reflect first lampshade and second lampshade and the reflector of corresponding light, described first lampshade and second lampshade are parabola shaped revolving body, and described first wick and second wick are separately positioned on the focus place of described first lampshade and second lampshade; Be provided with the described reflector that is used to make the parallel outgoing of light between described first lampshade and second lampshade, wherein said reflector is along half of the aperture area that is not less than corresponding lampshade perpendicular to the axial maximum secting area of the revolution of each lampshade.

In double lamp module described in the utility model, described reflector is a reflection right-angle prism.

In double lamp module described in the utility model, the height of described reflection right-angle prism be at least described first and second lampshades opening diameter 1/2.

In double lamp module described in the utility model, described reflector comprises that the cross section is the triangular prism of isosceles triangle, and adheres on the speculum on described trequetrous two inclined-planes.

In double lamp module described in the utility model, described triangular prism is that drift angle is the isoceles triangle post at right angle.

In double lamp module described in the utility model, at least one in described first lampshade and second lampshade is provided with speculum, and described speculum extends from the minimum point of this lampshade or peak, and perpendicular to herein light going direction.

In double lamp module described in the utility model, the top of described reflector is provided with speculum, and described speculum is perpendicular to herein light going direction.

In double lamp module described in the utility model, the described speculum that adheres on the triangular prism is a rectangle, semi-circular or annular.

In double lamp module described in the utility model, the scope of the opening radius of described first lampshade and second lampshade is $(2\sqrt{2}-2)f~(2\sqrt{2}+2)f,$ Wherein f is the parabola focal length.

In double lamp module described in the utility model, described reflector is the isoceles triangle post, and the setting drift angle is A, and two angles are B in addition, and the angle between two reflectings surface of reflector and two the parabola lampshade focus line directions is C, then satisfies following relation between A, B and the C: A+2B=180 °; B+C=90 °.

Implement double lamp module of the present utility model, have following beneficial effect: utilized the light that sends on the focus of parabola lampshade to be made into single light source at light source through just converging before the lens arra by the principle of this lampshade reflection and parallel output; Can keep the design of illuminator and imaging system, the brightness of being exported simultaneously is two, and wick provided adds total brightness, keep contrast and image quality, and because direct of travel keeping parallelism all of output light, so the light source of output can just can obtain uniform light source without extra assembly, and reduce the R﹠D costs and the time of ray machine.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:

Fig. 1 is the structural representation of a kind of double-lamp illuminating system of the prior art;

Fig. 2 is the structural representation of first embodiment of double lamp module in the utility model;

Fig. 3 is the structural representation of second embodiment of double lamp module in the utility model;

Fig. 4 is the structural representation of the 3rd embodiment of double lamp module in the utility model;

Fig. 5 is the structural representation of the 4th embodiment of double lamp module in the utility model;

Fig. 6 is the structural representation of the 5th embodiment of double lamp module in the utility model;

Fig. 7 is the structural representation of the another kind of reflector of double lamp module in the utility model;

Fig. 8 is the schematic diagram of the replacement structure of reflector in the utility model;

Fig. 9 is the front view that cooperates the speculum that forms the replacement structure among Fig. 8 with triangular prism;

Figure 10 is the front view that cooperates the another kind of speculum that forms the replacement structure among Fig. 8 with triangular prism;

Figure 11 is the conic line chart at parabola lampshade of the present utility model place;

Figure 12 is the sectional view of parabola lampshade of the present utility model;

Figure 13 is the speculum among Figure 10 cooperates, is applied to the 5th embodiment with triangular prism a schematic diagram;

Figure 14 is the speculum among Figure 10 cooperates, is applied to the 5th embodiment with triangular prism another schematic diagram;

Figure 15 is another kind of speculum cooperates, is applied to second embodiment with triangular prism a schematic diagram.

The specific embodiment

Fig. 2 is the structural representation of first embodiment of double lamp module in the utility model.As shown in Figure 2, this double lamp module 100 is applied in the optical projection system, for example, the light source that can be used as penetration or reflecting liquid crystal projector, and before light passes through its lens arra (Lens Array) 110, the light remittance is made into single directional light, light finally can be focused on.

This double lamp module 100 comprises two lampshades positioned opposite to each other, and each lampshade is parabola revolution body, and inner surface all is coated with the reflection coat, and incident light is all reflected.The focus of the first parabola lampshade 101 is provided with first wick 103, the focus of the second parabola lampshade 102 is provided with second wick 104, the light that such two wicks 103,104 send turns back along the direction parallel with the axle of parabola lampshade after 101,102 reflections of two parabola lampshades.

Figure 11 is the conic line chart at parabola lampshade of the present utility model 101,102 places.With reference to Figure 11, the distance of some p to two focus f1, f2 on this conic section is respectively r, r ', and the line between p point and the f1 and the angle of reference axis are α, and the focal length at focus f1 place is f, and the distance between two focus f1, the f2 is s.According to trigonometric function:

(r ') ²=r ²+ s ²-2 π cos (equation (1) of π-α)

Definition according to conic section:

R+r '=s+2f equation (2)

With equation (2) substitution equation (1), obtain:

$r=\frac{2f}{1+\frac{1+s/f\cos \mathrm{\α}}{1+s/f}}$ Equation (3)

When conic section is a bowlder, s=0, r=f;

When conic section is parabola, s=∞, $r=\frac{2\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="Y200820125448E00121.png"\; state="\{\{state\}\}">f</figure-callout>}}{1+\cos \mathrm{\&alpha;}}$ Equation (4)

Figure 12 is the sectional view of parabola lampshade of the present utility model.With reference to Figure 12, the utility model is limited to R with the scope of the opening radius of parabola lampshade 101,102 _Min~ R _MaxBetween, in a preferred embodiment, the point on the parabola obtains R when the angle α of the line of focus and X-axis is 45 ° _MinPoint on the parabola obtains R when the angle α of the line of focus and X-axis is 135 ° _Max

According to the parabolic function that obtains $r=\frac{2\mathrm{<figure-callout\; id="1"\; label="f"\; filenames="Y200820125448E00121.png"\; state="\{\{state\}\}">f</figure-callout>}}{1+\cos \mathrm{\&alpha;}},$ When α is 45 °, $r=2(2-\sqrt{2})f,$ R _Max=r*cos45 °, obtain $R_{\max }=(2\sqrt{2}+2)f;$ When α is 135 °, $r=2(2+\sqrt{2})f,$ R _Min=rcos45 °, obtain $R_{\min }=(2\sqrt{2}-2)f.$ Like this, the scope that can determine the opening radius of parabola lampshade 101,102 is $(2\sqrt{2}-2)f~(2\sqrt{2}+2)f.$

Return Fig. 2, on the light path between two parabola lampshades 101,102, be provided with reflector, be used to make the light vertical reflection to lens arra 110.This reflector can be a reflection right-angle prism 105 for example, this reflection right-angle prism 105 is right angle isoceles triangle posts, and the drift angle A in its cross section is 90 °, and two angle B are 45 ° in addition, and on two faces of parabola lampshade 101,102, be coated with the reflecting layer, can make incident ray 100% reflection.In order to make reflection right-angle prism 105 light reflected impinge perpendicularly on lens arra 110, first, second parabola lampshade 101,102 is oppositely arranged, and both focus lines are parallel with the bottom surface of reflection right-angle prism 105.Reflection right-angle prism 105 is not less than half of aperture area of corresponding lampshade along the axial maximum secting area of revolution perpendicular to each lampshade 101,102.And, the height of reflection right-angle prism 105 be at least the parabola lampshade opening diameter 1/2, its bottom surface can be with two parabola lampshades 101,102 concordant bottom, the height at top is concordant with the focus line of two parabola lampshades 101,102 at least, to guarantee that half light at least that first, second wick 103,104 sends can directly be reflected on the reflection right-angle prism 105.Particularly, parallel the inciding on the reflection right-angle prism 105 of half light at least of one of them parabola lampshade, and be reflected to lens arra 110; And another part light is because the insufficient height of reflection right-angle prism 105, be directly incident in another relative parabola lampshade, another parabola lampshade reflexes to its underpart with light, and secondary reflection again, arrive reflection right-angle prism 105, can arrive lens arra 110 equally like this.

Because the light that is reflexed on the reflection right-angle prism 105 by first, second parabola lampshade 101,102 all is parallel to each other, after right-angle prism 105 reflections that are reflected, can the parallel lens arra 110 that incides.

Fig. 3 is the structural representation of second embodiment of double lamp module in the utility model, and the part identical with first embodiment repeats no more.With reference to Fig. 3, among this embodiment, the volume of reflection right-angle prism 105 is bigger, its height is identical with the opening diameter of parabola lampshade 101,102, and the bottom surface is concordant bottom with two parabola lampshades 101,102, the height at top is concordant with the top of parabola lampshade 101,102, and like this, the light that first, second wick 103,104 sends directly arrives reflection right-angle prism 105 respectively after first, second parabola lampshade 101,102 reflections; The parallel lens arra 110 that incides after reflection right-angle prism 105 reflection again.Do not need repeatedly reflection through the parabola lampshade.

Fig. 4 is the structural representation of the 3rd embodiment of double lamp module in the utility model, and the part identical with first embodiment repeats no more.With reference to Fig. 4, on the basis of first embodiment, set up a speculum 106.Speculum 106 is arranged on one of them parabola lampshade, extends downwards and perpendicular to the focus line direction of two parabola lampshades 101,102 from the peak of this parabola lampshade.Illustrated among Fig. 4 speculum 106 is arranged on example on the first parabola lampshade 101, it also can be arranged on the second parabola lampshade 102.Like this, a part of light that wick 103,104 sends after parabola lampshade 101,102 reflections of correspondence, incides on the reflection right-angle prism 105, and is reflected to lens arra 110 respectively; Another part light incides speculum 106 after parabola lampshade 101,102 reflections of correspondence, and mirror 106 reflections that are reflected, return corresponding parabola lampshade, pass through two secondary reflections of parabola lampshade again, incide on the reflection right-angle prism 105, and finally be reflected to lens arra 110.Speculum 106 also can extend upward from the minimum point of this parabola lampshade and perpendicular to the direct of travel of light, i.e. the focus line direction of two parabola lampshades 101,102 herein.

Fig. 5 is the structural representation of the 4th embodiment of double lamp module in the utility model, and the part identical with first embodiment repeats no more.This embodiment has set up speculum 107 on the basis of Fig. 4.Promptly two speculums 106,107 are separately positioned on first, second parabola lampshade 101,102, extend vertically downward from the peak of separately parabola lampshade, and perpendicular to the direct of travel of light, i.e. the focus line direction of two parabola lampshades 101,102 herein.A part of light that first wick 103 sends incides on the reflection right-angle prism 105, and is reflected to lens arra 110 after 101 reflection of the first parabola lampshade; Another part light incides speculum 106 after 101 reflections of the first parabola lampshade, and mirror 106 reflections that are reflected, return the first parabola lampshade 101, through two secondary reflections of the first parabola lampshade 101, incide on the reflection right-angle prism 105 again, and finally be reflected to lens arra 110.

Similarly, a part of light that second wick 104 sends incides on the reflection right-angle prism 105, and is reflected to lens arra 110 after 102 reflection of the second parabola lampshade; Another part light incides speculum 107 after 102 reflections of the second parabola lampshade, and mirror 107 reflections that are reflected, return the second parabola lampshade 102, through two secondary reflections of the second parabola lampshade 102, incide on the reflection right-angle prism 105 again, and finally be reflected to lens arra 110.

Fig. 6 is the structural representation of the 5th embodiment of double lamp module in the utility model, and the part identical with first embodiment repeats no more.Different with the 3rd embodiment shown in Figure 4 is, among this embodiment, speculum 106 is arranged on the top of reflection right-angle prism 105, extends upward and perpendicular to the direct of travel of light herein.Like this, a part of light that wick 103,104 sends after parabola lampshade 101,102 reflections of correspondence, incides on the reflection right-angle prism 105, and is reflected to lens arra 110 respectively; Another part light incides speculum 106 after parabola lampshade 101,102 reflections of correspondence, and mirror 106 reflections that are reflected, return corresponding parabola lampshade, pass through two secondary reflections of parabola lampshade again, incide on the reflection right-angle prism 105, and finally be reflected to lens arra 110.

In the first above embodiment, the drift angle A of reflection right-angle prism 105 is 90 °, and two angle B are 45 ° in addition, therefore can guarantee light level incident, vertical outgoing.In fact reflector also can have other angle parameter, as long as can be with the light vertical reflection of incident to lens arra 110.Fig. 7 is the structural representation of the another kind of reflector of double lamp module in the utility model.With reference to Fig. 7, this reflector 111 is the isoceles triangle post, and the drift angle in its cross section is A, and two angles are B in addition, and these parameters satisfy following relation:

A+2B=180 ° of equation (5)

If two reflectings surface of reflector 111 be C perpendicular to the angle between the direction of lens arra 110, satisfy following the relation between B and the C:

B+C=90 ° of equation (6)

According to reflection law, when parabola lampshade 101,102 light reflected incide on the reflecting surface of reflector 111, and the angle between the reflecting surface also is necessary for C.So can determine the relative position relation between first, second parabola lampshade 101,102 and the reflector 111.In this case, between the focus line of two parabola lampshades 101,102 and the symmetry axis separately certain included angle is arranged.

Fig. 8 is the schematic diagram of the replacement structure of reflector in the utility model.As shown in Figure 8, the reflector among Fig. 2 can be combined by triangular prism 108 and two speculums 109 that are arranged on its inclined-plane.For example, triangular prism 108 can be the isosceles right angle wedge, and its drift angle A is 90 °, and two angle B are 45 ° in addition.Two speculums 109 can make incident ray 100% reflection.So can realize and the identical effect of reflection right-angle prism 105 among each embodiment.

Fig. 9 and Figure 10 are the front views that cooperates two embodiment that form the speculum of replacing structure among Fig. 8 with triangular prism.With reference to Fig. 9, speculum 109 can be a rectangle, and its back side adheres on the triangular prism.With reference to Figure 10, speculum 109 also can be semi-circular.Because it is less relatively to send the promptly directly parallel light beam that incides speculum from the focus of parabola lampshade, so speculum 109 centers can be provided with concentric circle holes.

Figure 13 and 14 is the speculum among Figure 10 cooperates, is applied to the 5th embodiment with triangular prism a schematic diagram.As shown in figure 13, this speculum 109 adheres on the triangular prism 108, and the speculum 106 of rectangle is set at the top of triangular prism 108.As shown in figure 14, the speculum 106 on triangular prism 108 end faces also can be semi-circular, and is similar with speculum 109.

The speculum 106 that cooperates with triangular prism 108 also can be other shapes, as circle, annular etc.Figure 15 is another kind of speculum cooperates, is applied to second embodiment with triangular prism a schematic diagram.In the figure, speculum 106 is an annular.Because the parabola lampshade is revolving body, and it is less relatively to send the promptly directly parallel light beam that incides speculum from the focus of parabola lampshade, and therefore the speculum 106 of this annular can make nearly 100% light reflection, and arrives lens arra 110.

In the utility model, utilized optical elements such as reflection right-angle prism can make the characteristic of light 100% reflection, and the light that sends on the focus of parabola lampshade can be made into single light source at light source through just converging before the lens arra by the principle of this lampshade reflection and parallel output; Can keep the design of illuminator and imaging system, only the wick module be extended the replacing time that design just can improve the brightness of projector and prolong bulb, keep contrast and image quality simultaneously, reduce the R﹠D costs and the time of ray machine.The user also can be according to user demand and condition simultaneously, and the open/close quantity of control wick is to cooperate the variation of external environment light.

Claims (10)

1, a kind of double lamp module, comprise: first wick that is used to emit beam and second wick, be used to reflect first lampshade and second lampshade and the reflector of corresponding light, it is characterized in that, described first lampshade and second lampshade are parabola shaped revolving body, and described first wick and second wick are separately positioned on the focus place of described first lampshade and second lampshade; Be provided with the described reflector that is used to make the parallel outgoing of light between described first lampshade and second lampshade, wherein said reflector is along half of the aperture area that is not less than corresponding lampshade perpendicular to the axial maximum secting area of the revolution of each lampshade.

2, double lamp module according to claim 1 is characterized in that, described reflector is a reflection right-angle prism.

3, double lamp module according to claim 2 is characterized in that, the height of described reflection right-angle prism be at least described first and second lampshades opening diameter 1/2.

4, double lamp module according to claim 1 is characterized in that, described reflector comprises that the cross section is the triangular prism of isosceles triangle, and adheres on the speculum on described trequetrous two inclined-planes.

5, double lamp module according to claim 4 is characterized in that, described triangular prism is that drift angle is the isoceles triangle post at right angle.

6, double lamp module according to claim 1 is characterized in that, at least one in described first lampshade and second lampshade is provided with speculum, and described speculum extends from the minimum point of this lampshade or peak, and perpendicular to herein light going direction.

7, double lamp module according to claim 2 is characterized in that, the top of described reflector is provided with speculum, and described speculum is perpendicular to herein light going direction.

8, double lamp module according to claim 4 is characterized in that, the described speculum that adheres on the triangular prism is a rectangle, semi-circular or annular.

9, double lamp module according to claim 1 is characterized in that, the scope of the opening radius of described first lampshade and second lampshade is

Wherein f is the parabola focal length.

10, according to claim 1 or 4 described double lamp modules, it is characterized in that, described reflector is the isoceles triangle post, the setting drift angle is A, two angles are B in addition, and the angle between two reflectings surface of reflector and two the parabola lampshade focus line directions is C, then satisfies following relation between A, B and the C: A+2B=180 °; B+C=90 °.

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