CN203054431U - LED illumination light path used for projector and capable of reducing optical energy losses - Google Patents
LED illumination light path used for projector and capable of reducing optical energy losses Download PDFInfo
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- CN203054431U CN203054431U CN 201320024403 CN201320024403U CN203054431U CN 203054431 U CN203054431 U CN 203054431U CN 201320024403 CN201320024403 CN 201320024403 CN 201320024403 U CN201320024403 U CN 201320024403U CN 203054431 U CN203054431 U CN 203054431U
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Abstract
The utility model discloses a LED illumination light path used for a projector and capable of reducing optical energy losses. The light path comprises a first LED light source, a second LED light source and a third LED light source. The first LED light source, the second LED light source and the third LED light source successively emit a first light beam, a second light beam and a third light beam. An optical wedge which is comprised by the light path possesses a first coating film surface and a second coating film surface. The first coating film surface reflects the first light beam and the second light beam and the third light beam are transmitted through the first coating film surface. The second coating film surface reflects the second light beam and the first light beam and the third light beam are transmitted through the second coating film surface. The first light beam passes through a first condenser and the optical wedge successively and then forms first emergent light. The second light beam passes through the first condenser and the optical wedge successively and then forms second emergent light. The third light beam passes through a second condenser and the optical wedge successively and then forms third emergent light. The first, second and third emergent light is received by a subsequent system. According to the light path of the utility model, because the optical wedge is used, the whole illumination light path only has two optical surfaces so that optical energy losses are greatly reduced; a light angle is optimized and geometry design efficiency is increased.
Description
Technical field
The utility model relates to a kind of optical lighting system, relates in particular to a kind of LED illumination path of the reduced optical energy loss for projector.
Background technology
In the prior art, the LED illumination path of projector generally adopts RGB to close photosystem, mainly contains two kinds: a kind of is directly to close light, and the RGB led chip is encapsulated on the same substrate, directly closes light, but the brightness of this scheme is not high, and color uniformity is poor.Engage light between second kind of scheme belongs to, shown in Fig. 1 a and Fig. 1 b, namely three led light sources close light by four optical surfaces, but the loss of the optical energy of this kind scheme is bigger, and, because the interference of two dichroic mirrors can't guarantee the repeatability of three kinds of color of light and the consistance of angle; In addition, it is bigger to adopt four optical surfaces to make that whole RGB closes the structure of photosystem, and compactedness is poor.
Therefore designing a kind of LED illumination path that loses for the reduced optical energy of projector is technical issues that need to address.
The utility model content
The purpose of this utility model is to provide a kind of LED illumination path of the reduced optical energy loss for projector.
For achieving the above object, the LED illumination path of described reduced optical energy loss for projector, comprise first led light source, second led light source and the 3rd led light source, described first led light source, second led light source and the 3rd led light source send first light beam, second light beam and the 3rd light beam successively; Be characterized in that described LED illumination path also comprises wedge, described wedge has the first filming face and the second plated film face, and described the first filming face reflects first light beam, and transmission second light beam and the 3rd light beam; The described second plated film face reflects second light beam, and transmission first light beam and the 3rd light beam; And,
Described first light beam is incident to the first filming face of described wedge behind the first condenser optically focused, form first emergent light after the reflection of this first filming face, and this first emergent light is received by follow-up system;
Described second light beam is incident to the first filming face of described wedge behind the first condenser optically focused, after the transmission of this first filming face, be incident to the described second plated film face, form second emergent light then in turn after the transmission of the reflection of this second plated film face and the first filming face, this second emergent light is received by described follow-up system;
Described the 3rd light beam is incident to the second plated film face of described wedge behind the second condenser optically focused, form the 3rd emergent light then in turn after the transmission of the transmission of the second plated film face and the first filming face, and the 3rd emergent light is received by described follow-up system.
Preferably, described first led light source and second led light source are encapsulated in the same housing, and perhaps described first led light source and second led light source are put together.
Preferably, after described first light beam, second light beam and the 3rd light beam passed through the reflection or refraction of the first filming face and the second plated film face respectively, first emergent light of formation, second emergent light and the 3rd emergent light overlapped, and are received by described follow-up system jointly.
Preferably, to be incident to the angle of described follow-up system be 90 ° for described first emergent light, second emergent light and the 3rd emergent light.
The beneficial effects of the utility model are, the LED illumination path of described reduced optical energy loss for projector, and the employing of wedge makes whole illumination path only have two optical surfaces, has significantly reduced the loss of optical energy; Optimize light angle, improved the design geometrical efficiency; First led light source and second led light source are packaged together, and make one-piece construction compacter.
Description of drawings
Fig. 1 a among Fig. 1 and Fig. 1 b show projector in the prior art between engage the light path synoptic diagram of the LED illumination path of light.
Fig. 2 shows the light path synoptic diagram of an embodiment of the LED illumination path of the reduced optical energy loss for projector described in the utility model.
Fig. 3 shows the synoptic diagram of the LED illumination path that indicates the angle configurations scheme.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Fig. 2 shows the light path synoptic diagram of an embodiment of the LED illumination path of the reduced optical energy loss for projector described in the utility model, as shown in Figure 2, the LED illumination path of described reduced optical energy loss for projector, comprise the first led light source L1, the second led light source L2 and the 3rd led light source L3, the described first led light source L1, the second led light source L2 and the 3rd led light source L3 send first light beam, second light beam and the 3rd light beam successively.Described LED illumination path also comprises wedge 3, and described wedge 3 has the first filming face S1 and the second plated film face S2, and described the first filming face S1 reflects first light beam, and transmission second light beam and the 3rd light beam; The described second plated film face S2 reflects second light beam, and transmission first light beam and the 3rd light beam.Here, the first filming face S1 and the second plated film face S2 are prior art, repeat no more in this article.
Described first light beam is incident to the first filming face S1 of described wedge 3 behind first condenser, 1 optically focused, form first emergent light after the reflection of this first filming face S1, and this first emergent light is received by follow-up system 4.
Described second light beam is incident to the first filming face S1 of described wedge 3 behind first condenser, 1 optically focused, after the transmission of this first filming face S1, be incident to the described second plated film face S2, form second emergent light then in turn after the transmission of the reflection of this second plated film face S2 and the first filming face S1, this second emergent light is received by described follow-up system 4.
Described the 3rd light beam is incident to the second plated film face S2 of described wedge 3 behind second condenser, 2 optically focused, form the 3rd emergent light then in turn after the transmission of the transmission of the second plated film face S2 and the first filming face S1, and the 3rd emergent light is received by described follow-up system 4.
Especially, for the structure that makes projector do compacter, the described first led light source L1 and the second led light source L2 are encapsulated in the same housing.
Fig. 3 shows the synoptic diagram of the LED illumination path that indicates the angle configurations scheme, as shown in Figure 3:
First light beam (for example blue light) that the described first led light source L1 and the second led light source L2 send and second light beam (for example ruddiness) are parallel to each other when initial, first light beam is behind first condenser, 1 optically focused, the angle A 1 that shines the first filming face S1 of wedge 3 is 48.87 °, because the first filming face S1 is reflection first light beam, then first light beam reflects at the first filming face S1 place, its reflected light is called first emergent light, and the angle A 1 that first emergent light is incident to follow-up system 4 is 90 °.
Second light beam that the described second led light source L2 sends is behind first condenser, 1 optically focused, the angle B 1 that shines the first filming face S1 of wedge 3 is 34.63 °, because the first filming face S1 is transmission second light beam, therefore the first filming face S1 is crossed in the second light beam transmission, and equal 25.94 ° with angle B 2() be incident on the second plated film face S2, because the second plated film face S2 is reflection second light beam, then second light beam reflects at the second plated film face S2 place, this reflected light equals 29.84 ° with angle B 3(then) be incident on the first filming face S1, because the first filming face S1 is transmission second light beam, then second light beam reflects at the first filming face S1, its refraction angle B4 is 48.87 °, its refract light is called second emergent light, and the angle B 5 that second emergent light is incident to described follow-up system 4 is 90 °.
The 3rd light beam (for example green glow) that described the 3rd led light source L3 sends is behind second condenser, 2 optically focused, the angle C1 that shines the second plated film face S2 of wedge 3 is 41.20 °, because the first filming face S1 is transmission the 3rd light beam, then the 3rd light beam reflects at the second plated film face S2 place, the refraction angle is 29.84 °, this refract light is incident on the first filming face S1 with 29.84 ° of angles then, because the first filming face S1 is transmission the 3rd light beam, then the 3rd light beam reflects at the first filming face S1, its refraction angle C2 is 48.87 °, its refract light is called the 3rd emergent light, and the angle C3 that the 3rd emergent light is incident to described follow-up system 4 is 90 °.
In the present embodiment, the first filming face S1 of described wedge 3 and the angle D1 of follow-up system 4 are 44.7 °, and the angle D2 of the first filming face S1 and the second plated film face S2 is 3.9 °.Setting by said structure and angle, make repeatability and the angle consistance of light before entering follow-up system 4 of these three kinds of colors all very good, making the illumination design efficiency have significantly promotes, namely this first emergent light, second emergent light and the 3rd emergent light overlap, form white light, the white light of Xing Chenging vertically is incident in the described follow-up system 4 then.
By adjustment S1, the angle of S2 face, namely the relative position of the angle of wedge 3 and led light source and wedge 3 makes the light that enters follow-up system 4 satisfy design requirement as far as possible, and the light that namely enters follow-up system 4 is parallel incident as far as possible.
Being the utility model preferred embodiment only in sum, is not to limit practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should belong to technology category of the present utility model.
Claims (3)
1. LED illumination path that is used for the reduced optical energy loss of projector, comprise first led light source, second led light source and the 3rd led light source, described first led light source, second led light source and the 3rd led light source send first light beam, second light beam and the 3rd light beam successively; It is characterized in that: described LED illumination path also comprises wedge, and described wedge has the first filming face and the second plated film face, and described the first filming face reflects first light beam, and transmission second light beam and the 3rd light beam; The described second plated film face reflects second light beam, and transmission first light beam and the 3rd light beam; And,
Described first light beam is incident to the first filming face of described wedge behind the first condenser optically focused, form first emergent light after the reflection of this first filming face, and this first emergent light is received by follow-up system;
Described second light beam is incident to the first filming face of described wedge behind the first condenser optically focused, after the transmission of this first filming face, be incident to the described second plated film face, form second emergent light then in turn after the transmission of the reflection of this second plated film face and the first filming face, this second emergent light is received by described follow-up system;
Described the 3rd light beam is incident to the second plated film face of described wedge behind the second condenser optically focused, form the 3rd emergent light then in turn after the transmission of the transmission of the second plated film face and the first filming face, and the 3rd emergent light is received by described follow-up system.
2. the LED illumination path of the reduced optical energy loss for projector according to claim 1, it is characterized in that: described first led light source and second led light source are encapsulated in the same housing, and perhaps described first led light source and second led light source are put together.
3. the LED illumination path of the reduced optical energy loss for projector according to claim 1, it is characterized in that: after described first light beam, second light beam and the 3rd light beam pass through the reflection or refraction of the first filming face and the second plated film face respectively, first emergent light that forms, second emergent light and the 3rd emergent light overlap, and are received by described follow-up system jointly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024403 CN203054431U (en) | 2013-01-17 | 2013-01-17 | LED illumination light path used for projector and capable of reducing optical energy losses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024403 CN203054431U (en) | 2013-01-17 | 2013-01-17 | LED illumination light path used for projector and capable of reducing optical energy losses |
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| CN203054431U true CN203054431U (en) | 2013-07-10 |
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| CN 201320024403 Expired - Fee Related CN203054431U (en) | 2013-01-17 | 2013-01-17 | LED illumination light path used for projector and capable of reducing optical energy losses |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064241A (en) * | 2013-01-17 | 2013-04-24 | 成都迅达光电有限公司 | Light-emitting diode (LED) illumination light path used for projector and capable of reducing optical energy loss |
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2013
- 2013-01-17 CN CN 201320024403 patent/CN203054431U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064241A (en) * | 2013-01-17 | 2013-04-24 | 成都迅达光电有限公司 | Light-emitting diode (LED) illumination light path used for projector and capable of reducing optical energy loss |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20150117 |
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| EXPY | Termination of patent right or utility model |