CN216848449U - Optical system and projection apparatus - Google Patents
Optical system and projection apparatus Download PDFInfo
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- CN216848449U CN216848449U CN202220267901.7U CN202220267901U CN216848449U CN 216848449 U CN216848449 U CN 216848449U CN 202220267901 U CN202220267901 U CN 202220267901U CN 216848449 U CN216848449 U CN 216848449U
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Abstract
The utility model discloses an optical system and projection arrangement, including at least one solid state light source luminous array, solid state light source luminous array is provided with a plurality of luminescence chips for sending out the light source light; the fluorescent powder layer is arranged on the solid-state light source light emitting array and used for converting at least part of light source light into excited light, and the excited light and the unconverted light source light are mixed to form white light; a light condensing device for guiding the white light to a collimating optical element; a polarizing element for processing the light beam exiting the collimating optical element; and the light modulator is used for processing the light beams emitted from the polarization element to form image light.
Description
Technical Field
The utility model relates to a projection arrangement technical field especially relates to an optical system and projection arrangement.
Background
In the existing projection devices, Liquid Crystal Display (LCD) projection optical devices are mostly of three-piece type, Liquid Crystal On Silicon (LCOS) projection devices are also mostly of three-piece type, and Digital Light Processing (DLP) projection devices are mostly of single-piece type. Generally, three sheets perform better, but at a much higher cost. The imaging device may be implemented in three or more sheets depending on the cost performance of the projection device.
When the LED lamp is applied to the projection field as a white light source, the white light is realized by adopting multiple RGB LED chips, and the sequential processing is carried out on RGB light by adopting a single-chip DLP or a single-chip LCD, but the problem of dispersion exists, the rainbow effect is easy to occur, and the projection effect is poor. Moreover, the price of the single-chip DLP is much higher than that of the LCD, which results in high cost, complex structure and large volume of the projection device.
SUMMERY OF THE UTILITY MODEL
The defect that projection effect to above-mentioned prior art is not good, with high costs, the structure is complicated, bulky, the utility model provides an optical system and projection arrangement.
An optical system comprising at least one solid state light source light emitting array provided with a plurality of light emitting chips for emitting light source light; the fluorescent powder layer is arranged on the solid-state light source light emitting array and used for converting at least part of light source light into stimulated light, and the stimulated light and the unconverted light source light are mixed to form white light; a light condensing device for guiding the white light to a collimating optical element; a polarizing element for processing the light beam exiting the collimating optical element; and the light modulator is used for processing the light beams emitted from the polarization element to form image light.
The light modulator also comprises a focusing optical element used for converging the light beams emitted from the light modulator.
Wherein the light modulator is an LCD.
Wherein the collimating optical element and the focusing optical element are both Fresnel lenses.
The light source further comprises a first reflecting element, and the first reflecting element is used for guiding the white light emitted from the light-condensing device.
The optical system further comprises a second reflecting element, wherein the second reflecting element is used for guiding the light beam emitted from the focusing optical element.
The solid-state light source light emitting array is a blue LED array or a blue laser array.
The fluorescent powder layer is a yellow fluorescent powder layer.
And the polarization element is provided with a heat insulation and light transmission part for isolating heat generated by the solid-state light source light emitting array.
The heat insulation and light transmission part is heat insulation glass and is used for preventing heat generated by the solid-state light source light emitting array from being conducted to the light modulator through air.
The polarization element is arranged on the heat-insulation light-transmitting component, and the heat-insulation light-transmitting component is used for bearing the polarization element and isolating heat generated by the solid-state light source light-emitting array from being conducted to the light modulator.
The solid-state light source light emitting array is fixed on a circuit board, and the circuit board is arranged on a metal plate and fixedly connected with the metal plate through three bolts.
Wherein the thickness of the phosphor layer is less than 0.2mm such that the source light is partially used for excitation.
Wherein at least 80% of the light source light is used to excite the phosphor layer to convert to the stimulated light; at least 3% of the light source light is mixed as primary light and the excited light to form white light.
A projection device comprising an optical system as described above.
Compared with the prior art, the utility model discloses a following beneficial effect: projection arrangement, optical system are through setting up at least one solid-state light source luminous array, and solid-state light source luminous array is provided with a plurality of luminescence chips for send light source light, phosphor layer set up in on the solid-state light source luminous array, be used for converting at least part of light source light to receiving laser, excited light and the light source light that is not converted mix and form white light, handle the required image light of formation through the light modulator to white light, compare with current projection arrangement, realized that projection arrangement is with low costs, and the projection is effectual, and simple structure, compactness, small, optical element design is simple, can avoid the rainbow effect.
Drawings
To illustrate the technical solutions in the embodiments of the present invention more clearly, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of an optical system according to a first embodiment of the present invention.
FIG. 2 is a schematic view of the solid state light source light emitting array of FIG. 1 mounted.
Fig. 3 is a schematic diagram of an optical system according to a second embodiment of the present invention.
Fig. 4 is a schematic diagram of an optical system according to a third embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, fig. 1 is a schematic diagram of an optical system according to a first embodiment of the present invention, in which an optical system 100 includes at least one solid-state light source light emitting array 101 having a plurality of light emitting chips for emitting light source light; the fluorescent powder layer is arranged on the solid-state light source light emitting array and used for converting at least part of light source light into stimulated light, and the stimulated light and the unconverted light source light are mixed to form white light; a light-condensing device 102 for guiding the white light to a collimating optical element 103; the collimating optical element 103 collimates the light beams to make the light beams parallel; a polarizing element 104 for processing the light beam exiting from the collimating optical element 103; and a light modulator 105 for processing the light beam emitted from the polarizing element 104 to form image light.
The solid-state light source light emitting array, the fluorescent powder layer, the light condensing device, the collimating optical element, the polarizing element and the light modulator are linearly arranged, the difficulty of design can be reduced due to arrangement, the mounting and the adjustment are convenient, the used optical element is simple, and the structure is simpler.
In the optical system in this embodiment, the solid-state light source light emitting array 101 may be a blue LED array or a blue laser array, and may be selected according to needs, and the number of the solid-state light source light emitting arrays may be one or multiple, and may be set according to actual brightness needs.
The fluorescent powder layer is a yellow fluorescent powder layer, the fluorescent powder layer is arranged on the solid-state light source light emitting array, and the fluorescent powder layer can be arranged on the light emitting chip in a close fit manner, so that heat dissipation is facilitated, and the conversion efficiency of the fluorescent powder is improved.
Further, fig. 2 is a schematic diagram of fixing the solid-state light source light emitting array of fig. 1, a plurality of light emitting chips are arranged on the solid-state light source light emitting array 101, the light emitting chips are not shown in the figure, the fluorescent powder layer 107 is distributed on the light emitting chips to cover the light emitting chips, the solid-state light source light emitting array 101 is fixed on the circuit board 108, the circuit board 108 is arranged on the metal plate 109 and is fixedly connected with the metal plate through three bolts 110, and the connecting mode is high in stability, convenient for fixing the solid-state light source light emitting array, and the fixed connection can also be realized through screws.
In a modified embodiment, each light emitting chip may be covered with a phosphor layer, so that the phosphor layer converts part of the light source light emitted by the plurality of light emitting chips into the stimulated light.
The light emitting chip emits light source light, the fluorescent powder layer at least converts part of the light source light into stimulated light, and the stimulated light and the unconverted light source light are mixed to form white light.
The polarization element 104 is configured to process the light beam emitted from the collimating optical element 103, that is, the excited light and the light source light that is not converted, that is, the white light, and by processing the polarization state of the light beam, the light beam enters the light modulator in one polarization state, so as to be processed by the light modulator subsequently, the number of the polarization element may also be multiple, and the polarization element may be configured as needed.
The light modulator 105 modulates the light beam emitted from the polarizer 104, that is, processes white light, and the light modulator 105 is provided with a filter and a polarizing plate to process the white light so as to obtain image light required for projection. The light modulator may be an LCD.
Further, the optical system may also be provided with a focusing optical element 106 for converging the light beam exiting the light modulator.
The collimating optics 103 and the focusing optics 106 may each be provided as fresnel lenses, although other collimating and focusing lenses may be provided. The light-condensing device 102 may be a condensing lens.
Furthermore, due to different color standards in different countries, the color tends to be warm in China and cool in Europe and America, and different thicknesses of the fluorescent powder layers are set, so that the conversion rate of light of the light source is different, and different color development requirements are met. The thickness of the phosphor layer may be set to be less than 0.2mm, so that the color temperature and color coordinates of the white light may be effectively controlled. For example, when the thickness of the phosphor layer is 0.08mm, at least 90% of the light source excites the phosphor layer to perform wavelength conversion, so as to form the required stimulated light, the unconverted light source light and the stimulated light are mixed to form white light, the unconverted light source light, such as blue light, has a brightness ratio of about 3% to 5% in the white light, or 3% to 10% of the blue light source light is not converted and is mixed with the converted stimulated light to form white light, so as to meet the requirement of generating white light meeting the display requirement. For another example, the thickness of the phosphor layer may be set to 0.05mm, so that at least 80% of the light from the light source excites the phosphor layer to perform wavelength conversion, and further form the required stimulated light, the unconverted light from the light source and the stimulated light are mixed to form white light, and the unconverted light from the light source, such as blue light, has a luminance ratio of about 4% to 6% in the white light, or 3% to 20% of the light from the blue light source is not converted and is mixed with the converted stimulated light to form white light, thereby satisfying the requirement of generating white light meeting the display requirement.
Referring to fig. 3, fig. 3 is a schematic diagram of an optical system according to a second embodiment of the present invention, and the optical system 200 of the present embodiment is mainly different from the optical system of the first embodiment in that a first reflective element 211 is further disposed, and the first reflective element 211 is used for guiding, i.e., reflecting, white light emitted from the light condensing device and reflecting the white light to the collimating optical element.
Further, the optical system 200 may further include a second reflective element 212, where the second reflective element 212 is used to guide the light beam emitted from the focusing optical element so that the light beam reaches the lens of the projection apparatus.
The first reflecting element and the second reflecting element are arranged to fold the light path, so that the volume of the optical system is reduced, the space is saved, and the structure is compact.
Referring to fig. 4, fig. 4 is a schematic view of an optical system according to a third embodiment of the present invention, the optical system 300 of this embodiment is different from the optical system of the first embodiment mainly in that a heat-insulating and light-transmitting component 313 is disposed on the polarization element 304 for isolating heat generated by the solid-state light source light emitting array, the heat-insulating and light-transmitting component 313 may be heat-insulating glass for isolating heat generated by the solid-state light source light emitting array from being conducted to the light modulator through air;
the polarization element 304 is arranged on the heat-insulating light-transmitting component 313, the heat-insulating light-transmitting component 313 is used for bearing the polarization element 304 and isolating heat generated by the solid-state light source light-emitting array from being conducted to the light modulator, the heat-insulating light-transmitting component and the polarization element can be arranged in a close fit manner or can be arranged in an integrated manner, the size of an optical system can be reduced, materials are saved, and the cost is reduced.
It should be noted that, in this embodiment, an improvement of the polarization element on which the heat-insulating and light-transmitting component is disposed may also be applied to the optical system 200 in the second embodiment of the present invention, that is, the polarization element in the optical system 200 may also have the heat-insulating and light-transmitting component, so as to achieve an effect of isolating heat generated by the solid-state light source light-emitting array from being conducted to the light modulator through air, and therefore, no additional drawing is shown.
The utility model discloses further provide a projection arrangement who is formed by above-mentioned optical system.
Projection arrangement, optical system are through setting up at least one solid-state light source luminous array, and solid-state light source luminous array is provided with a plurality of luminescence chips for send light source light, phosphor layer set up in on the solid-state light source luminous array, be used for converting at least part of light source light to receiving laser, excited light and the light source light that is not converted mix and form white light, handle the required image light of formation through the light modulator to white light, compare with current projection arrangement, realized that projection arrangement is with low costs, and the projection is effectual, and simple structure, compactness, small, optical element design is simple, can avoid the rainbow effect.
The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.
Claims (15)
1. An optical system comprising at least one solid state light source light emitting array provided with a plurality of light emitting chips for emitting light source light;
the fluorescent powder layer is arranged on the solid-state light source light emitting array and used for converting at least part of light source light into stimulated light, and the stimulated light and the unconverted light source light are mixed to form white light;
a light condensing device for guiding the white light to a collimating optical element;
a polarizing element for processing the light beam exiting the collimating optical element;
and the light modulator is used for processing the light beams emitted from the polarization element to form image light.
2. The optical system of claim 1, further comprising a focusing optical element for converging the light beam exiting the light modulator.
3. The optical system of claim 1, wherein the light modulator is an LCD.
4. The optical system of claim 2, wherein the collimating optical element and the focusing optical element are each fresnel lenses.
5. The optical system of claim 1, further comprising a first reflective element for directing white light exiting the light collection device.
6. The optical system of claim 2, further comprising a second reflective element for directing the light beam exiting the focusing optical element.
7. The optical system of claim 1, wherein the solid state light source light emitting array is a blue LED array or a blue laser array.
8. The optical system of claim 1, wherein the phosphor layer is a yellow phosphor layer.
9. An optical system as claimed in any one of claims 1 to 8, wherein the polarising element is provided with thermally insulating light transmissive means for insulating heat generated by the light emitting array of solid state light sources.
10. The optical system of claim 9, wherein the thermally insulating and light transmitting member is an insulating glass for blocking heat generated by the light emitting array of solid state light sources from being conducted through air to the light modulator.
11. The optical system of claim 9, wherein the polarizing element is disposed on the thermally insulated optically transmissive member for carrying the polarizing element and for isolating heat generated by the light emitting array of solid state light sources from conducting to the light modulator.
12. The optical system of claim 1, wherein the solid state light source light emitting array is secured to a circuit board disposed on a metal plate and fixedly attached to the metal plate by three bolts.
13. The optical system of claim 1, wherein the thickness of the phosphor layer is less than 0.2mm such that the source light is partially used for excitation.
14. The optical system of claim 1, wherein at least 80% of the source light is used to excite the phosphor layer to convert to the stimulated light; at least 3% of the light source light is mixed as primary light and the excited light to form white light.
15. A projection device comprising an optical system according to any one of claims 1 to 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220267901.7U CN216848449U (en) | 2022-02-10 | 2022-02-10 | Optical system and projection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220267901.7U CN216848449U (en) | 2022-02-10 | 2022-02-10 | Optical system and projection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216848449U true CN216848449U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220267901.7U Active CN216848449U (en) | 2022-02-10 | 2022-02-10 | Optical system and projection apparatus |
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| Country | Link |
|---|---|
| CN (1) | CN216848449U (en) |
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- 2022-02-10 CN CN202220267901.7U patent/CN216848449U/en active Active
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