CN210428069U - Laser light source structure of high-brightness projector - Google Patents
Laser light source structure of high-brightness projector Download PDFInfo
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- CN210428069U CN210428069U CN201921758386.7U CN201921758386U CN210428069U CN 210428069 U CN210428069 U CN 210428069U CN 201921758386 U CN201921758386 U CN 201921758386U CN 210428069 U CN210428069 U CN 210428069U
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Abstract
The utility model relates to a laser light source field, concretely relates to laser light source structure of highlight projector, including the laser, the light beam outgoing direction of laser is equipped with first lens group, still is equipped with a dichroic mirror, is equipped with second lens group and phosphor powder wheel below this dichroic mirror in proper order, is equipped with third lens group and total mark dodging component above the dichroic mirror in proper order, the laser beam that the laser sent shines on a dichroic mirror through first lens group, after the green wave band light beam in the laser beam passes through the dichroic mirror, shines on the phosphor powder wheel through second lens group and converts into fluorescence, this fluorescence loops through second lens group, dichroic mirror and third lens group, image on the income light plane of total mark dodging component, when the facula that makes total mark dodging component receipts light plane and the rectangle shape that the display chip corresponds, the heat energy is dispersed, the influence of the temperature on the luminous efficiency of the fluorescent powder is greatly reduced, and the output brightness of the projector is improved.
Description
Technical Field
The utility model relates to a laser light source field, concretely relates to laser light source structure of highlight projector.
Background
The laser phosphor projection is a trend of development of the projection industry, and a key link in the laser phosphor projection, namely excited light of the phosphor, is influenced by the temperature of the phosphor. In the process of exciting the fluorescent powder, laser energy is very concentrated, a light-emitting point generates high temperature of nearly one or two hundred ℃, and if the heat dissipation treatment is not good, the light-emitting efficiency of the fluorescent powder is greatly influenced, so that the output of a projection complete machine is influenced.
At present, most of laser spots of laser fluorescent powder are round or square, the surface shape characteristic of part of a light emitting surface is still kept when light emitted by the light emitting surface type is collected and enters an integral light uniformizing optical element (such as a light bar) of a projector, and most of light receiving surfaces of the light bar are rectangular corresponding to a display chip. Under the condition that the light receiving angle of the light bar is not changed, the size of the light beam is reduced so that as much light as possible can enter the light bar, and the light spot of the light receiving surface of the light bar is matched with the rectangular shape corresponding to the display chip. The reduction of the size of the light beam reduces the size of the exciting light beam on the fluorescent light, the undersize laser beam brings heat energy concentration, and the increase of the temperature greatly influences the luminous efficiency of the fluorescent powder, so that the output brightness of the whole projection machine is influenced.
Disclosure of Invention
The utility model aims at the not enough that prior art corresponds, provide a laser light source structure of highlight projector, under the unchangeable condition of the receipts light angle of the even light component of integral, when the rectangular shape assorted that the facula that makes the receipts light plane of the even light component of integral corresponds with display chip, make the heat energy dispersion, reduced the influence of temperature to the luminous efficacy of phosphor powder greatly, improved the output luminance of projector.
The utility model aims at adopting the following scheme to realize: the laser light source structure of the highlight projector comprises a laser, wherein a first lens group and a dichroic mirror are arranged in the light beam emitting direction of the laser, a second lens group and a fluorescent powder wheel are sequentially arranged below the dichroic mirror, a third lens group and an integral dodging element are sequentially arranged above the dichroic mirror, a laser beam emitted by the laser irradiates the dichroic mirror through the first lens group, a green waveband light beam in the laser beam is reflected by the dichroic mirror and then irradiates the fluorescent powder wheel through the second lens group to be converted into fluorescent light, and the fluorescent light sequentially passes through the second lens group, the dichroic mirror and the third lens group to be imaged on a light incident plane of the integral dodging element.
The size of the projection of the fluorescence on the image focal plane of the third lens group is the same as that of the light incident plane of the integral dodging element.
The angle α between the dichroic mirror and the direction of incidence of the laser beam is equal to 45 °.
The first lens group and the second lens group each include at least 2 lenses.
The third lens group includes at least one lens.
The utility model discloses contain following beneficial effect: the laser comprises a laser, wherein a first lens group is arranged in the light beam emergent direction of the laser, a dichroic mirror is further arranged, a second lens group and a fluorescent powder wheel are sequentially arranged below the dichroic mirror, a third lens group and an integral dodging element are sequentially arranged above the dichroic mirror, a laser beam emitted by the laser irradiates the dichroic mirror through the first lens group, a green waveband light beam in the laser beam is reflected by the dichroic mirror and then irradiates the fluorescent powder wheel through the second lens group to be converted into fluorescent light, the fluorescent light sequentially passes through the second lens group, the dichroic mirror and the third lens group and is imaged on the light incident plane of the integral dodging element, and a light spot of the light receiving plane of the integral dodging element is matched with a rectangular shape corresponding to a display chip.
The size of the projection of the fluorescence on the image focal plane of the third lens group is the same as that of the light incident plane of the integral dodging element, so that heat energy is dispersed, the influence of temperature on the luminous efficiency of the fluorescent powder is greatly reduced, and the output brightness of the projector is improved.
An included angle α between the dichroic mirror and the incident direction of the laser beam is equal to 45 degrees, so that the green waveband light beam in the laser beam can be irradiated on the fluorescent powder wheel through the second lens group after being reflected by the dichroic mirror.
The first lens group and the second lens group respectively comprise at least 2 lenses for adjusting the size of the light spot.
The third lens group comprises at least one lens for adjusting the spot size of the light incident plane of the integrating and dodging element.
The utility model has the advantages of, simple structure, easily mass production can make the heat energy dispersion when making the planar facula of receipts light of integral dodging element and the rectangular shape assorted that display chip corresponds through a plurality of battery of lens under the unchangeable circumstances of receipts light angle of integral dodging element, has reduced the influence of temperature to the luminous efficacy of phosphor powder greatly, has improved the output luminance of projector.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the shape of a light beam on a phosphor wheel;
FIG. 3 is a diagram illustrating a second embodiment.
Detailed Description
As shown in fig. 1 to 3, a laser light source structure of a high-brightness projector includes a laser 1, a first lens group 3 is disposed in a light beam emitting direction of the laser 1, a dichroic mirror 5 is further disposed, a second lens group 10 and a phosphor wheel 7 are sequentially disposed below the dichroic mirror 5, the first lens group 3 and the second lens group 10 each include at least 2 lenses, a third lens group 11 and an integrating dodging element 9 are sequentially disposed above the dichroic mirror 5, an included angle α between the dichroic mirror 5 and an incident direction of a laser beam 2 is equal to 45 °, the third lens group 11 includes at least one lens, a laser beam 2 emitted from the laser 1 is irradiated onto the dichroic mirror 5 through the first lens group 3, a green integrating band light beam 4 in the laser beam 2 is reflected by the dichroic mirror 5, and then irradiated onto the phosphor wheel 7 through the second lens group 10 to be converted into a phosphor light beam 8, the second lens group 10, the dichroic mirror 5 and the third lens group 11 of the phosphor wheel 7 are converted into a phosphor light beam 8 through the second lens group 10, the phosphor wheel 5, the phosphor beam 8, the green integrating band light beam 4 in a plane after being reflected by the dichroic mirror 5, the phosphor band light beam 4 passes through the third lens group 7, the phosphor wheel 7, the phosphor beam passes through the phosphor wheel 7, the phosphor band light beam is converted into a light spot size of a light beam with a light spot size of a light spot, and a light spot size of a light beam formed by a light beam with a light spot size of a light beam with a light spot size approximately equal to be adjusted by a light spot size of a light beam size of a plane 2, and a light beam size of a light spot size of a light beam size of a plane 7, and a light.
Example one:
in this embodiment, the structure is used in a DLP laser phosphor projector with 1080P resolution, and the aspect ratio of the imaging chip is 16: 9, the entrance plane of the integrating dodging element 9 is also approximately aspect ratio 16: the rectangle of 9, through the parameter of adjusting the battery of lens, increased the facula area of green wave band light beam 4 on the phosphor powder wheel 7, make full use of the income light plane area of the even light component of integral 9 for the aspect ratio of the facula of laser beam 2 on phosphor powder wheel 7 is approximate 16: 9, the aspect ratio of the spot size of the acceptance plane of the integrating dodging element 9 is still 16: 9, the heat dissipation condition is effectively relieved.
Example two:
in this embodiment, taking a 3LCD projector with an XGA resolution display chip as an example, the aspect ratio of the XGA chip is 4: 3, since the polarization conversion system suitable for the conventional 3LCD can optically expand the light beam by two times in one direction, when the angles of the light beam output by the laser fluorescent light source on the x and y surfaces are the same, the length-width ratio is 2: 3 is most suitable. As shown in fig. 3, using the curved reflector 13 and the cylindrical lens 15, it is still possible to realize spots with different aspect ratios on the phosphor wheel 7. In this embodiment, the aspect ratio of the size of the laser spot is 2: 3, the aspect ratio of the spot size on the light emitting surface of the phosphor wheel 7 is 3: 2, the fluorescence 8 passes through the second lens group 10 and the dichroic mirror 5 in sequence, and after being combined with the red and blue waveband light beam 6 transmitted out of the dichroic mirror 5, the combined light beam 12 passes through the third lens group 11, is imaged on the incident plane of the integrator dodging element 9, and is irradiated into the fly eye integrator dodging element 14.
The above only be the utility model discloses a preferred embodiment to be not used for the restriction the utility model discloses, technical personnel in the field are not deviating from the utility model discloses a under the prerequisite of spirit, right the utility model discloses the change of going on all falls into the utility model discloses a protection scope.
Claims (5)
1. The utility model provides a laser light source structure of highlight projector, includes laser instrument (1), the beam emitting direction of laser instrument (1) is equipped with first battery of lens (3), its characterized in that: the integrated uniform-light laser is characterized by further comprising a dichroic mirror (5), a second lens group (10) and a fluorescent powder wheel (7) are sequentially arranged below the dichroic mirror (5), a third lens group (11) and an integrated uniform-light element (9) are sequentially arranged above the dichroic mirror (5), a laser beam (2) emitted by the laser (1) irradiates onto the dichroic mirror (5) through the first lens group (3), a green waveband light beam (4) in the laser beam (2) is reflected by the dichroic mirror (5) and then irradiates onto the fluorescent powder wheel (7) through the second lens group (10) to be converted into a fluorescent light (8), and the fluorescent light (8) sequentially passes through the second lens group (10), the dichroic mirror (5) and the third lens group (11) to be imaged on a light incidence plane of the integrated uniform-light element (9).
2. The laser light source structure of a high-brightness projector according to claim 1, characterized in that: the size of the projection of the fluorescence (8) on the image focal plane of the third lens group (11) is the same as that of the light incident plane of the light integrating and homogenizing element (9).
3. The laser light source structure of claim 1, wherein an angle α between the dichroic mirror (5) and the incident direction of the laser beam (2) is equal to 45 °.
4. The laser light source structure of a high-brightness projector according to claim 1, characterized in that: the first lens group (3) and the second lens group (10) each comprise at least 2 lenses.
5. The laser light source structure of a high-brightness projector according to claim 1, characterized in that: the third lens group (11) includes at least one lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921758386.7U CN210428069U (en) | 2019-10-21 | 2019-10-21 | Laser light source structure of high-brightness projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921758386.7U CN210428069U (en) | 2019-10-21 | 2019-10-21 | Laser light source structure of high-brightness projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210428069U true CN210428069U (en) | 2020-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921758386.7U Active CN210428069U (en) | 2019-10-21 | 2019-10-21 | Laser light source structure of high-brightness projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210428069U (en) |
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2019
- 2019-10-21 CN CN201921758386.7U patent/CN210428069U/en active Active
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