WO2018121059A1 - Source de lumière laser et dispositif de projection - Google Patents

Source de lumière laser et dispositif de projection Download PDF

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Publication number
WO2018121059A1
WO2018121059A1 PCT/CN2017/109325 CN2017109325W WO2018121059A1 WO 2018121059 A1 WO2018121059 A1 WO 2018121059A1 CN 2017109325 W CN2017109325 W CN 2017109325W WO 2018121059 A1 WO2018121059 A1 WO 2018121059A1
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WO
WIPO (PCT)
Prior art keywords
laser
type
heat dissipating
dissipating component
light source
Prior art date
Application number
PCT/CN2017/109325
Other languages
English (en)
Chinese (zh)
Inventor
胡飞
郭祖强
杜鹏
李屹
Original Assignee
深圳市光峰光电技术有限公司
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Publication of WO2018121059A1 publication Critical patent/WO2018121059A1/fr

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/48—Laser speckle optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/208—Homogenising, shaping of the illumination light

Definitions

  • the present invention relates to a laser light source and a projection apparatus.
  • laser light sources are increasingly used in the field of projection. Since laser light sources have the advantages of high energy density and small optical expansion, laser light sources have gradually replaced bulbs and LED light sources in the field of high-intensity light sources. Among them, the light source system that uses the laser light source to excite the phosphor to generate the required light (such as blue laser to excite red and green phosphor to produce white light) has become the mainstream of application because of its high luminous efficiency, good stability and low cost. .
  • a laser light source, a phosphor, and a three-chip LCD optical machine are generally used, because of the long life and brightness of the laser light source and the phosphor, and the three-piece type LCD optical machine has the advantages of good picture quality and bright colors, making laser light source, phosphor and 3-chip LCD optical machine a new type of projection equipment.
  • the reflective ultra-short focus lens is composed of an ultra short focal length group and a reflective bowl.
  • the ultra-short focal lens group and the reflective bowl form an imaging system, in which the ultra-short focal lens group will image to an area before the reflective bowl to form an intermediate image, and the reflective bowl continues to image the intermediate image.
  • the visible reflective bowl is part of the imaging device and participates in imaging.
  • the reflection of light in the current reflective bowl is achieved by coating.
  • the dielectric film is usually used. Due to the special shape of the reflective bowl, the reflective surface is generally a free-form surface, and the volume is large, so the coating is coated. The phenomenon of uneven coating is prone to occur, resulting in uneven light intensity of the reflective bowl, which affects the color uniformity of the projected image.
  • FIG. 1 is a schematic structural view of a prior art reflective bowl.
  • the reflecting surface of the reflective bowl is a free curved surface (such as a quadric surface, a polynomial aspheric surface, etc.), and includes a region a, a region on the reflective surface Domain b and region C, the coating reflectance of the region &, region b and region C may be poor due to problems in the coating process
  • FIG. 2 is a schematic diagram of the reflection spectrum of the coating at different regions of the laser source spectrum and the reflective bowl.
  • the dotted line is the relationship between the reflectivity and the wavelength corresponding to the region a, the region b, and the region c in Fig. 1, respectively.
  • the laser light source for exciting the phosphor is generally provided directly by the laser light source, but since the spectrum of the laser light source is narrow, the difference in reflectance of the coating area a, b, c on the reflective bowl leads to the reflective bowl.
  • the blue light has different intensity, which causes the brightness of the blue light on the screen to be uneven, which makes the white color uniformity of the projected image greatly affected.
  • the reflective bowl coating process cannot be better, a solution is needed. Solve the technical problem that affects the uniformity of the color of the projected picture caused by the unevenness of the light of the reflective bowl.
  • uneven coating of optical coating elements such as mirrors and filter films of existing projection devices may also cause uneven light emission, which leads to technical problems of poor color uniformity of projection images of existing projection devices, and it is necessary to improve .
  • the conventional projection apparatus has poor uniformity of color of the projection image due to unevenness of the coating due to uneven coating of the optical coating elements such as the reflective bowl, the mirror, and the filter film
  • a laser light source comprising a substrate, a laser disposed on the substrate, and a heat dissipating component disposed corresponding to the laser; each laser has the same temperature and a laser having a wavelength range consistent with each other in an operating state;
  • the heat dissipating component includes at least two types of heat dissipating components that operate independently of each other: a first type of heat dissipating component and a second type of heat dissipating component;
  • the laser is correspondingly divided into at least two types of lasers: a first type of laser that dissipates heat from the first type of heat dissipating elements and a second type of laser that dissipates heat from the second type of heat dissipating elements;
  • the heat dissipation performance of the first type of heat dissipating component and the second type of heat dissipating component are different in an operating state, so that the temperature of the first type of laser and the second type of laser are different under working conditions, thereby
  • the laser emitted by one type of laser drifts relative to the main peak wavelength of the laser emitted by another type of laser.
  • the spectrum of the laser light finally emitted by the laser light source is wider than the spectrum of the laser light emitted by any one of the first type of laser and the second type of laser.
  • the laser light emitted by any one of the lasers is not less than 20% of the amount of light emitted by the other type of laser.
  • the heat dissipation coefficient of the first type of heat dissipating component and the second type of heat dissipating component are different, so that the first type of heat dissipating component and the second type of heat dissipating component are in a working state
  • the heat dissipation performance is different.
  • the first type of heat dissipating component and the second type of heat dissipating component are configured to conduct heat to dissipate heat to a corresponding laser, the first type of heat dissipating component and the second class
  • the material thickness or area of the heat dissipating component is different, so that the heat dissipating performance of the first type of heat dissipating component and the second heat dissipating component are different, wherein the heat dissipating performance of the two types of heat dissipating components and the material thickness and/or heat dissipating area thereof Has a positive correlation.
  • the first type of heat dissipating component and the second type of heat dissipating component are both semiconductor coolers
  • the operating current of the first type of heat dissipating component and the semiconductor cooler of the second type of heat dissipating component are different, so that the heat dissipation performance of the first type of heat dissipating component and the second type of heat dissipating component in an operating state Different
  • the first type of heat dissipating component and the second type of heat dissipating component are both semiconductor refrigerators;
  • the semiconductor refrigerating device includes an electrode, and a P type and a N connected to the electrode Type galvanic couple;
  • the first type of heat dissipating component and the second type of heat dissipating component of the semiconductor refrigerator have different numbers of galvanic couples, so that the first type of heat dissipating component and the second type of heat dissipating component dissipate heat in an operating state Different performance
  • the heat dissipating component includes three types of heat dissipating components that operate independently of each other, and the laser is correspondingly divided into three types of lasers respectively dissipating heat by the three types of heat dissipating components;
  • the heat dissipation performance of the components is different, so that the main peak wavelengths of the lasers of the three types of lasers are respectively 440 to 450 nm, 450 to 460 nm, and 460 to 470 nm, or the wavelengths of the main peaks of the lasers of the three types of lasers are respectively 450 ⁇ 460nm, 460 ⁇ 470nm and 470 ⁇ 480nm.
  • the wavelength peaks of the lasers emitted by the three types of lasers are 445 and 455, respectively. 465 nm or 455, 465, 475 nm, respectively.
  • the heat dissipating component includes a first type of heat dissipating component, a second type of heat dissipating component, and a third type of heat dissipating component that operate independently of each other
  • the laser includes heat dissipation by the first type of heat dissipating component a first laser, a second laser that dissipates heat from the second type of heat dissipating component, and a third laser that dissipates heat from the third type of heat dissipating component, wherein the first laser, the second laser, and the third laser are in a matrix Arranging, wherein in the direction of the row, the second laser is located between the first laser and the third laser, and the first laser, the second laser, and the third laser of the adjacent two rows are arranged in reverse order The first laser and the third laser are alternately arranged in the direction of the column.
  • each type of laser is a light source module, and each of the light source modules is independently disposed, and the laser of each light source module emits a laser having the same wavelength range and the laser of any other light source module.
  • the emitted laser has a different wavelength range.
  • a projection apparatus comprising a laser light source, an optical system and a projection lens, the laser light source emitting laser light, the optical system receiving the laser light, transmitting part of the laser light and converting another part of the laser light into converted light and depending on the image Data modulating the partially transmitted laser light and the converted light to generate image light, the projection lens projecting according to the image light to display a projected image, the projection lens comprising an ultra short focal length group and a reflective bowl, The ultra-short-focus lens group receives the image light and images the image before the reflective bowl, the reflective bowl reflects the image light for projection display, wherein the reflective coating of the reflective bowl has non-uniformity, the laser light source The finally emitted laser light is used to improve the unevenness of the light emitted by the reflection coating unevenness of the reflective bowl, the laser light source comprising a substrate, a laser disposed on the substrate, and a heat dissipating component disposed corresponding to the laser; The laser has the same temperature at the same operating temperature and emits
  • the heat dissipating component includes at least two types of heat dissipating components that operate independently of each other: a first type of heat dissipating component and a second type of heat dissipating component;
  • the laser is correspondingly divided into at least two types of lasers: a first type of laser that dissipates heat from the first type of heat dissipating component and a second type of laser that dissipates heat from the second type of heat dissipating component;
  • the heat dissipation performance of the first type of heat dissipating component and the second type of heat dissipating component are different in an operating state, so that the temperature of the first type of laser and the second type of laser are different under working conditions, thereby
  • the laser emitted by one type of laser drifts relative to the main peak wavelength of the laser emitted by another type of laser.
  • the spectrum of the laser light finally emitted by the laser light source is wider than the spectrum of the laser light emitted by any one of the first type of laser and the second type of laser.
  • the laser light emitted by any one of the lasers is not less than 20% of the amount of light emitted by the other type of laser.
  • the first type of heat dissipating component and the second type of heat dissipating component have different thermal conductivity.
  • the first type of heat dissipating component and the second type of heat dissipating component are configured to conduct heat to dissipate heat to a corresponding laser, the first type of heat dissipating component and the second class The material thickness or area of the heat dissipating component is different.
  • the first type of heat dissipating component and the second type of heat dissipating component are both semiconductor coolers
  • the operating current of the first type of heat dissipating component and the semiconductor cooler of the second type of heat dissipating component are different.
  • the first type of heat dissipating component and the second type of heat dissipating component are both semiconductor refrigerators;
  • the semiconductor refrigerating device includes an electrode, and a P type and a N connected to the electrode Type galvanic couple;
  • the heat dissipating component includes three types of heat dissipating components that operate independently of each other, and the laser is correspondingly divided into three types of lasers respectively radiated by the three types of heat dissipating components;
  • the heat dissipation performance of the components is different, so that the main peak wavelengths of the lasers of the three types of lasers are respectively 440 to 450 nm, 450 to 460 nm, and 460 to 470 nm, or the wavelengths of the main peaks of the lasers of the three types of lasers are respectively 450 ⁇ 460nm, 460 ⁇ 470nm and 470 ⁇ 480nm.
  • the wavelength peaks of the lasers emitted by the three types of lasers are 445 and 455, respectively.
  • the heat dissipating component includes a first type of heat dissipating component, a second type of heat dissipating component, and a third type of heat dissipating component that operate independently of each other
  • the laser includes heat dissipation by the first type of heat dissipating component a first laser, a second laser that dissipates heat from the second type of heat dissipating component, and a third laser that dissipates heat from the third type of heat dissipating component, wherein the first laser, the second laser, and the third laser are in a matrix Arranging, wherein in the direction of the row, the second laser is located between the first laser and the third laser, and the arrangement order of the first laser, the second laser, and the third laser of two adjacent rows In the direction of the column, the first laser and the third laser are alternately arranged.
  • each type of laser is a light source module, and each of the light source modules is independently disposed, and the laser of each light source module emits lasers having the same laser wavelength range and any other light source module.
  • the emitted laser has a different wavelength range.
  • the heat dissipation performance of the first type of heat dissipating component and the second type of heat dissipating component in an operating state are different, so that the corresponding first type of laser and The temperature of the second type of laser in the working state is different, so that the laser light emitted by the first type of laser is different from the main peak of the wavelength of the laser light emitted by the second type of laser, and then the laser light finally emitted by the laser light source
  • the spectrum is wider than the laser emitted by any one of the first type of laser and the second type of laser, since the color recognized by the human eye is a spectral range, if there is a coating in a wider band Uneven, then what the human eye actually sees is the integral of the spectrum of this band.
  • optical coating elements such as reflective bowls, mirrors, filter films, etc. will be reduced and not easily perceived by the human eye, thus improving the cause.
  • Uneven coating of optical coating elements such as reflective bowls, mirrors, and filter films causes uniformity of projection images due to uneven light. Poor, and to enhance the effect of the projection system using the projection of the laser light source.
  • the laser light emitted by any one of the lasers is not less than 20% of the amount of light emitted by the other type of laser, so that the laser light finally emitted by the laser light source is broad in spectrum.
  • the wide-spectrum light effectively improves the unevenness of the coating of optical coating elements such as reflective bowls, mirrors, and filter films.
  • the heat dissipation elements of different thermal conductivity are used to make the operating temperature of the laser different, and the laser light source can also emit laser light with different peak wavelengths and wavelength ranges, and the control of the laser light source is further controlled.
  • the design of the heat dissipating material allows the same laser to emit laser light of different wavelength ranges, which is also advantageous for reducing the cost of the laser light source.
  • the heat dissipating component of the same material with different thicknesses or areas can also achieve the effect that the laser light source emits laser light with different peak wavelengths and different wavelength ranges, and the control of the laser light source is simpler.
  • the design of the heat dissipating material enables the same laser to emit laser light with different peak wavelengths and different wavelength ranges, which is also beneficial for reducing the cost of the laser light source.
  • the work of the laser is made Different temperatures can also be achieved, so that the laser light source emits laser light with different peak wavelengths and different wavelength ranges, and can achieve relatively precise control of the working temperature of the laser, and the operating current can be adjusted, so even As the operating temperature of the laser source, the main peak of the wavelength, and the wavelength range change, the spectrum of the laser source can be adjusted by modulating the operating current of the semiconductor cooler, so that the laser emitted by the laser source is more suitable for the demand. .
  • the present invention also provides another laser light source and a projection apparatus using the same.
  • a laser light source comprising at least two types of lasers, wherein the laser light emitted by the at least two types of lasers is the same, and the main peaks of the wavelengths of the lasers emitted by the at least two types of lasers are different, and the at least two types of lasers emit
  • the main peak of the wavelength of the laser light is respectively in a wavelength range continuously set in the above-mentioned order in the first wavelength range, the second wavelength range, the third wavelength range, and the fourth wavelength range, wherein the first wavelength range is 440 to 450 nm.
  • the second wavelength range is 450 to 460 nm
  • the third wavelength range is 460 to 4 70 nm
  • the fourth wavelength range is 470 to 480 nm.
  • the main peak of the wavelength of the laser light emitted by the at least two types of lasers is two consecutively arranged in the above order among 445, 455, 465, and 475 nm.
  • the at least two types of lasers include a first type of laser, a second type of laser, and a third type of laser
  • the first type of laser includes a first laser
  • the second type of laser includes a second laser
  • the third type of laser includes a third laser
  • the first laser, the second laser, and the third laser are arranged in a matrix, wherein the second laser is located in the row direction a first laser, a second laser, and a third laser between two lasers and the third laser are arranged in opposite order; in the direction of the column, the first laser and the third laser Alternately arranged.
  • each type of laser is a light source module, and each of the light source modules is independently disposed, and the laser of each light source module emits lasers having the same laser wavelength range and any other light source module.
  • the emitted laser has a different wavelength range.
  • the present invention makes the spectrum of the laser light emitted by the laser light source widened by making the main peak of the laser wavelength emitted by the laser of the laser light source different, because the color recognized by the human eye is a Spectral range, if there is uneven coating in a wide band, then what the human eye actually sees is the integral of the spectrum of this band.
  • the unevenness of the coating will be reduced and not easily perceived by the human eye, thus reducing Reflectance difference caused by uneven coating of optical coating elements such as reflective bowls, mirrors, and filter films, and improvement of projection due to uneven coating due to uneven coating of optical coating elements such as reflective bowls, mirrors, and filter films
  • Reflectance difference caused by uneven coating of optical coating elements such as reflective bowls, mirrors, and filter films
  • improvement of projection due to uneven coating due to uneven coating of optical coating elements such as reflective bowls, mirrors, and filter films improves the projection effect of the projection system using the laser light source.
  • FIG. 1 is a schematic structural view of a prior art reflective bowl.
  • FIG. 2 is a schematic view showing a reflection spectrum of a coating at different regions of a laser light source spectrum and a reflective bowl.
  • FIG. 3 is a block diagram showing the structure of a projection apparatus of the present invention.
  • FIG. 4 is a schematic structural view of a first embodiment of a laser light source according to the present invention.
  • FIG. 5 is a schematic diagram of a laser light source spectrum, a spectrum of a laser beam, and a reflection spectrum of a coating at different regions of the reflective bowl of the projection apparatus of FIG. 3.
  • FIG. 6 is a schematic structural view of a laser light source according to a second embodiment of the present invention.
  • FIG. 7 is a graph showing the relationship between the wavelength and the laser temperature.
  • FIG. 8 is a schematic structural view of a laser light source according to a third embodiment of the present invention.
  • FIG. 9 is a schematic structural view of a laser light source according to a fourth embodiment of the present invention.
  • FIG. 10 is a schematic structural view of a laser light source according to a fifth embodiment of the present invention.
  • 11 is a schematic view showing the structure and principle of the semiconductor refrigerator.
  • FIG. 3 is a block diagram showing the structure of the projection apparatus 10 of the present invention.
  • the projection device 10 includes a laser light source 100, an optical system 110, a projection lens 120, and a projection screen 130.
  • the laser light source 100 emits laser light
  • the optical system 110 receives the laser light, transmits a partial laser light, and converts another partial laser light into converted light, and modulates the transmitted partial laser light and the converted light according to image data to generate image light.
  • the projection lens 120 is projected on the projection screen 130 according to the image light to display a projection image.
  • the laser light source 100 may include at least two types of lasers, and the lasers emitted by the at least two types of lasers have the same color (such as a blue laser) but the main peaks of the wavelengths are different, thereby the spectrum of the laser light emitted by the laser light source 100. The range is wider.
  • Each of the lasers of the at least two types of lasers emits laser light having the same wavelength range under the same operating temperature.
  • FIG. 4 is a schematic structural view of the first embodiment of the laser light source 100 of the present invention.
  • the laser light source 100 may include a first laser 101a, a second laser 101b, and a third laser 101c, and the first laser 101a, the second laser 101b, and the third laser 101c may all be semiconductor laser diodes ( LD), and the lasers emitted by the first laser 101a, the second laser 101b, and the third laser 101c have the same color (such as a blue laser) but the main peaks of the wavelengths are different.
  • the first laser 101a, the second laser 101b, and the third laser 101c each emit blue laser light, and the main peaks of the wavelengths of the first laser 101a, the second laser 101b, and the third laser 101c are not the same.
  • the number of the first laser 101a, the second laser 101b, and the third laser 101c is plural, and the plurality of first lasers 101a may constitute a first type of laser, and the plurality of The second laser 101b may constitute a first type of laser, and the plurality of third lasers 101c may constitute a third type of laser Device.
  • the amount of laser light emitted by any one of the types of lasers is not less than 20% of the amount of light emitted by any one of the other types of lasers.
  • the amount of laser light emitted by the first laser 10 la is not less than 20% of the amount of light emitted by any one of the lasers 101b, 101c of the second or third type.
  • the amount of light emitted by the second laser 101b is not less than 20% of the amount of light emitted by any one of the lasers 101a, 101c of the first or third type.
  • the amount of laser light emitted by the third laser 101c is not less than 20% of the amount of light emitted by any one of the first type or second type of lasers 101a, 101b. Therefore, the spectrum of the laser light finally emitted by the laser light source 100 is wider than that of the laser light emitted by any one of the plurality of types of lasers, that is, the broad spectrum light.
  • the wavelength ranges of the laser light emitted by the first laser 101a, the second laser 101b, and the third laser 101c may also be different.
  • the wavelengths of the lasers emitted by the three types of lasers may be in three consecutive wavelength ranges, such as 440 to 450 nm, 450 to 460 nm.
  • the main peak wavelength of the laser emitted by the three types of lasers may also fall in the above three consecutive wavelength ranges of 440 ⁇ 450nm, 4 50 ⁇ 460nm, 460 ⁇ 470nm or 450 ⁇ 460nm, 460 ⁇ 470nm,
  • the laser light source 100 may also include a fourth laser.
  • the lasers emitted by the four types of lasers have different main peak wavelengths and wavelength ranges, such as those generated by the four types of lasers.
  • the wavelength of the laser can be 440 ⁇ 450nm, 450 ⁇ 460nm, 460 ⁇ 470nm and
  • the main peaks of the wavelengths of the lasers emitted by the four types of lasers are respectively 440 to 450 nm, 450 to 460 nm, and 460 to 470 nm.
  • the wavelength range and the wavelength main peak of the laser light emitted by the first laser 101a, the second laser 101b, the third laser 101c, and the like can also be adjusted according to actual needs, and are not limited to the above.
  • the lasers of the three types of lasers emit low wavelengths of laser light. Less blue light can improve the damage caused by low-wavelength blue light to the user's eyes and achieve eye protection.
  • the number of the first laser 101a, the second laser 101b, and the third laser 101c is plural.
  • the structure of the plurality of first lasers 101a and the main peak of the wavelength of the emitted laser light may be
  • the first light source module is formed on the same substrate 102
  • the plurality of second lasers 101b have the same wavelength main peak as the emitted laser light and are arranged on the same substrate 102 to form a second light source module.
  • the plurality of third lasers 101c may have the same wavelength main peak as that of the emitted laser light and be arranged on the same substrate 102 to form a third light source module.
  • the laser light source 100 is divided into three light source modules.
  • the laser light source 100 may also include only two light source modules of the first light source module and the second light source module, but the lasers emitted by multiple lasers of each light source module The main peaks of the wavelengths are the same and are different from the main peaks of the wavelengths of the lasers emitted by the plurality of lasers of any other light source module.
  • the number of lasers of each light source module is equal, and the substrates of the two or three light source modules are independent of each other and juxtaposed.
  • a plurality of lasers of each light source module may be arranged in series but not limited to a series.
  • the plurality of first lasers 101a may be connected in series but not limited to a series connection, such as parallel or series connection.
  • the plurality of second lasers 101b may be connected in series but not limited to a series connection, and may also be connected in parallel or in series or in parallel
  • the plurality of third lasers 101c may be connected in series but not It is limited to series connection, and may also be connected in parallel or in series and in parallel.
  • the optical system 110 can include a wavelength conversion device, a light shaping device, a polarization device, a relay lens, a spatial light modulator, and a light splitting/combining device, and the wavelength conversion device receives the Laser light emitted from the laser light source, and transmitting part of the laser light and converting another part of the laser light into the converted light, the transmitted partial laser light and the converted light are homogenized by the light shaping device and converted into polarization via the polarization device
  • the converted light is imaged by the relay lens to the spatial light modulator, the spatial light modulator comprises three LCD optical machines, and the three LCD optical machines of the spatial light modulator are based on the image data.
  • the converted light that modulates the polarization state produces the image light, and the image light is supplied to the projection lens via the spectroscopic/combining device.
  • the wavelength conversion device may be a color wheel including a red fluorescent material and a green fluorescent material
  • the transmitting portion of the laser light is a blue laser
  • the converted light may include a blue laser to excite the red fluorescent material and the green fluorescent material.
  • the red-induced laser light and the green-receiving laser generated by the material, the blue laser light, the red-receiving laser light, and the green-receiving laser light in the transmissive portion may be combined into white light.
  • the projection lens 120 may include an ultra short focal length group and a reflective bowl, the ultra short focal length group receiving the image light and imaging before the reflective bowl, the reflective bowl reflecting the image light and On the projection screen 1 Projection display on 30.
  • the reflective coating of the reflective bowl has non-uniformity, and the laser light emitted by the laser light source 100 has a wide spectrum, which can improve the unevenness of the light output of the projection device 10 caused by the unevenness of the reflective coating of the reflective bowl.
  • FIG. 5 is a schematic diagram of the spectrum of the laser light source 100, the spectrum of the laser light, and the reflection spectrum of the coating at different areas of the reflective bowl. It can be seen that since the main peaks of the laser wavelengths emitted by the at least two lasers 101 of the laser light source 100 are different, the spectrum of the laser light emitted by the laser light source is widened, because the color recognized by the human eye is a spectral range, if in a comparison There is uneven coating in the wide band, so what the human eye actually sees is the integral of the spectrum of this band. The unevenness of the coating will be reduced and not easily perceived by the human eye, thereby making the spectrum of the laser light source 100 The widening can reduce the unevenness of the light emitted by the uneven coating of the reflective bowl.
  • the laser light source 100 divides a plurality of light source modules according to different wavelength ranges of light emitted by the laser, because the structure of the laser of each light source module is the same as the wavelength range of the emitted laser light, so that The manufacture of each light source module is relatively simple, and it is also beneficial to reduce the manufacturing cost of the light source module.
  • FIG. 6 is a schematic structural diagram of a laser light source 200 according to a second embodiment of the present invention.
  • the laser light source 200 of the second embodiment has substantially the same structure as the laser light source 100 of the first embodiment, and the main difference between the two is that: in the laser light source 200 of the second embodiment, the plurality of laser light sources 200
  • the lasers 201 are all disposed on the same substrate 202, and the plurality of lasers 201 of the laser light source 200 may be connected in series.
  • the plurality of lasers 201 include a first laser 201a, a second laser 201b, and a third laser 201c.
  • the lasers emitted by the first laser 201a, the second laser 201b, and the third laser 201c have the same color but wavelength.
  • the main peak and wavelength ranges are different.
  • the first laser 201a, the second laser 201b, and the third laser 201c may be arranged in a matrix, specifically, the nth row (n is greater than or equal to 1), the first laser 201a, the second laser 201b, and the third laser 201c
  • the first laser 201a, the second laser 201b, and the third laser 201c may be arranged in the reverse order of the nth row, that is, the third laser 201c and the second laser 201b.
  • the first laser 201a is arranged in the reverse order of the nth row, that is, the third laser 201c and the second laser 201b.
  • the second laser is located between the first laser and the third laser, and the arrangement order of the first laser, the second laser, and the third laser in two adjacent rows is opposite;
  • the first laser and the third laser are alternately arranged in the direction of the column.
  • the light source emitted by the laser light source 200 is more uniform by the matrix arrangement, and the projection effect by the projection device using the laser light source 200 is better.
  • lasers of the same structure can emit lasers with different peak wavelengths and wavelength ranges due to different operating temperatures, and thus can be achieved by controlling the operating temperatures of the lasers of the laser source.
  • the effect of the spectrum of the laser light emitted by the laser light source 200 is broadened.
  • Figure 7 is a graph of wavelength versus laser temperature. As shown in FIG. 7, when the temperature of the laser itself increases, the wavelength thereof also increases.
  • the temperature of each laser in the laser light source By controlling the temperature of each laser in the laser light source to change stepwise, the spectrum of the blue laser is widened and the projection device is improved. The purpose of color uniformity.
  • a specific technical solution for widening the luminescence spectrum of the laser light source by controlling the temperature of each laser in the laser light source will be described with reference to the third to fifth embodiments.
  • FIG. 8 is a schematic structural view of a laser light source according to a third embodiment of the present invention.
  • the laser light source of the third embodiment includes a laser 301 disposed on the substrate 302 and a heat dissipating component disposed corresponding to the laser 301.
  • the heat dissipating component is configured to conduct heat to dissipate heat from the laser, and the heat dissipating component may be disposed between the laser 301 and the substrate 302.
  • the heat dissipating component may include a first type of heat dissipating component 303, a second type of heat dissipating component 304, a third type of heat dissipating component 305, and a fourth type of heat dissipating component 306 that operate independently of each other.
  • the heat dissipation performance of the first type of heat dissipating component 303, the second type of heat dissipating component 304, the third type of heat dissipating component 305, and the fourth type of heat dissipating component 306 are different in an operating state.
  • the laser 301 is divided into a first type of laser 301a that is dissipated by the first type of heat dissipating component 303, a second type of laser 301b that dissipates heat by the second type of heat dissipating component 304, and is dissipated by the third type. a third type of laser 305a that dissipates heat from the element 305, and a fourth type of laser 301d that dissipates heat from the fourth type of heat dissipating element 306
  • the number of the first type of lasers 301a may be plural, and the amount of laser light emitted by all of the first type of lasers 301a is not lower than all of the second type of lasers 301b or the third type of lasers 301c or fourth. 20% of the amount of light emitted by the laser 301d.
  • the number of the second type of lasers 301b may be plural, and the amount of laser light emitted by all of the second type of lasers 301b is not lower than all of the first type of lasers 301a or the third type of lasers 301c or the fourth type of lasers 301d. 20% of the amount of light emitted.
  • the number of the third type lasers 301c may be plural, and the light quantity of the laser light emitted by all the third type lasers 301c is not lower than all the said 20% of the amount of light emitted by a type of laser 301a or a second type of laser 301b or a fourth type of laser 301d.
  • the number of the fourth type of lasers 301d may be plural, and the amount of laser light emitted by all of the fourth type lasers 301d is not lower than all of the first type laser 301a or the second type laser 301b or the third type laser 301c. 20% of the amount of light emitted.
  • the structures and performances of the plurality of first type lasers 301a, the second type lasers 301b, the third type lasers 301c, and the fourth type lasers 301d may be the same. Further, in an embodiment, the numbers of the various types of lasers are the same.
  • the laser includes four types, and the heat dissipating component also includes four types.
  • the laser and the heat dissipating component may also include two types and three types. Class, five or more, that is, can be selected according to actual needs, and the number of categories will not be described here.
  • the heat dissipation performance of the first type of heat dissipating component 303, the second type of heat dissipating component 304, the third type of heat dissipating component 305, and the fourth type of heat dissipating component 306 are different in an operating state.
  • the temperature of the first type of laser 301a, the second type of laser 301b, the third type of laser 301c, and the fourth type of laser 301d are different in an operating state, so that the first type of laser 301a, the The main peaks of the wavelengths of the laser light emitted by the second type of laser 301b, the third type of laser 301c, and the fourth type of laser 301d are different, so that the laser light emitted by one type of laser is opposite to the main peak wavelength of the laser light emitted by the other type of laser.
  • the first type of heat dissipating component 303, the second type of heat dissipating component 304, the third type of heat dissipating component 305, and the fourth type of heat dissipating component 306 have different heat dissipation performances under working conditions. It can be understood that the operating power, structural performance, ambient temperature, humidity, heat dissipation time, heat dissipation space, etc. of the heat sink components (such as the first to fourth types of lasers) corresponding to the four types of heat dissipating components are other than the heat dissipating components.
  • the measurement is performed under the condition that the various condition parameters are the same, and the temperatures of the heat sink members (such as the first to fourth types of lasers) corresponding to the four types of heat dissipating components are different after being radiated by the four types of heat dissipating components.
  • the operating temperatures of the four types of lasers are different due to different heat dissipation performance of the four types of heat dissipating components, and the wavelength ranges of the lasers emitted by the four types of heat sinks may also be different.
  • the wavelengths of the lasers emitted by the four types of lasers may be in four consecutive wavelength ranges, such as in the range of 440 to 450 nm, 450 to 460 nm, 460 to 470 nm, and 470 to 480 nm, respectively.
  • the main peak wavelength of the laser light emitted by the laser may also be in the range of 440 to 450 nm, 450 to 460 nm, 460 to 470 nm, and 470 to 480 nm, respectively.
  • the main peak of the wavelength may be 445 nm, 455 nm, 465 nm, and 475 nm.
  • the laser light source may include three types of heat dissipating components and first to third or second to fourth types of lasers, and the wavelength ranges of the lasers emitted by the three types of lasers.
  • the wavelength peaks of the lasers emitted by the three types of lasers may be respectively in three consecutive wavelength ranges, such as 440 to 450 nm, 450 to 460 nm, 460 to 470 nm or 450 to 460 nm, 460 to 470 nm, and 470 to 480 nm. Falling in the above three consecutive wavelength ranges 440 ⁇ 450nm, 450 ⁇ 460nm, 460 ⁇ 470nm or 450 ⁇ 460nm, 460 ⁇ 470nm,
  • planar arrangement design of the above three types of lasers may be aligned with the planar arrangement in the first and second embodiments.
  • the structure is basically the same, and the planar arrangement design structure will not be described here.
  • the thermal conductivity of the four types of heat dissipating components 303, 304, 305, and 306 corresponding to the four types of lasers 301 are different, so that the heat dissipation performance of the four types of heat dissipating components 303, 304, 305, and 306 in an operating state is different.
  • the plane area, the thickness, and the position of the laser corresponding to the four types of heat dissipating components 303, 304, 305, and 306 may be the same but the thermal conductivity is different, so that the four types of heat dissipating components 303, 304, and 305 are different.
  • the thermal conductivity is different from that of 306 in the operating state, and thus the heat dissipation performance of the corresponding laser 301 is different.
  • the four types of heat dissipating components 303, 304, 305, and 306 are different materials, such as silver, copper, aluminum, and iron.
  • the laser 301 can specifically adopt the semiconductor blue laser diode described in the first embodiment, and the planar arrangement thereof can adopt the lasers 101 and 201 of the first and second embodiments. Arrangement, the planar arrangement will not be described here.
  • the heat dissipation performance of the fourth type of heat dissipating component 306 is different in the working state, and corresponding to the first type of laser 301a, the second type of laser 301b, the third type of laser 301c, and the fourth type of laser 301d.
  • Different temperatures in the working state may also cause the laser light emitted by one type of laser to drift relative to the main peak wavelength of the laser light emitted by the other type of laser, so that the first type of laser 301a, the second type of laser 301b, The main peak wavelength and wavelength range of the laser light emitted by the third type laser 301c and the fourth type laser 301d Differently, the laser light source 300 finally emits a spectrum of laser light that is wider than that of the laser of any one of the types (such as 301a, 301b. 301c or 301d).
  • the heat dissipation elements 303, 304, 305 and 306 of different thermal conductivity are used to make the operating temperature of the laser different, and the laser light source 300 can also be used to emit laser light of different wavelength main peaks and wavelength ranges, and
  • the control of the laser light source 300 is more simple, and the design of the heat dissipating material allows the same laser to emit laser light of different wavelength ranges, which is also advantageous for reducing the cost of the laser light source 300.
  • FIG. 9 is a schematic structural view of a laser light source 400 according to a fourth embodiment of the present invention.
  • the laser light source 400 of the fourth embodiment is substantially the same as the laser light source 300 of the third embodiment, and the main difference between the two is: in the fourth embodiment, four of the four types of lasers 401a, 401b. 401c 401d
  • the heat dissipation coefficients of the heat dissipating components 403, 404, 405, and 406 may be the same, but the material thickness and/or the area are different, so that the heat dissipation performance of the four types of heat dissipating components 403, 404, 405, and 406 are different, and then the four types of lasers 401a, 401b.
  • the heat dissipation properties of the four types of heat dissipating components 403, 404, 405, and 406 have a positive correlation with their material thickness and/or heat dissipating area.
  • the heat dissipation performance of the two types of heat dissipating components has a positive correlation with the material thickness of the material, which means that: in the case of other parameters related to heat dissipation performance, the material thickness of one heat dissipating component is higher than that of the other heat dissipating component. When the thickness is large, the heat dissipation performance of the former is higher than that of the latter.
  • the heat dissipation performance of the two types of heat dissipating components has a positive correlation with the heat dissipating area of the heat dissipating component. It refers to: in the case of other parameters related to heat dissipation performance, the heat dissipating area of one heat dissipating component is lower than that of the other heat dissipating component. If the area is large, the heat dissipation performance of the former is higher than that of the latter.
  • the materials of the four types of heat dissipating components 403, 404, 405, and 406 may each include aluminum, but the thicknesses of the aluminum materials of the four types of heat dissipating components 403, 404, 405, and 406 are different.
  • the thicknesses of the four types of heat dissipating components 403, 404, 405, and 406 may be the same but the plane areas are different to make the heat dissipation performance of the four types of heat dissipating components 403, 404, 405, and 406. different.
  • the thicknesses and plane areas of the four types of heat dissipating elements 403, 404, 405, and 406 may be different, so that the heat dissipation performance of the four types of heat dissipating elements 403, 404, 405, and 406 are different.
  • the laser 401 can specifically adopt the semiconductor described in the first embodiment.
  • the planar arrangement can adopt the arrangement of the lasers 101 and 20 1 in the first and second embodiments, and the planar arrangement thereof will not be described herein.
  • the heat dissipating elements of the same material with different thicknesses or areas can also achieve the laser light source 400 emitting different wavelengths of main peaks and different wavelength ranges.
  • the control of the laser light source 400 is more simple, and the design of the heat dissipating material enables the same laser to emit laser light having different peak wavelengths and different wavelength ranges, which is also advantageous for reducing the cost of the laser light source 400.
  • FIG. 10 is a schematic structural view of a laser light source 500 according to a fifth embodiment of the present invention.
  • the laser light source 500 of the fifth embodiment is substantially the same as the laser light source 300 of the third embodiment, and the main difference between the two is: four types of heat dissipating elements 503, 504 of the laser light source 500 of the fifth embodiment, 505 and 506 are both semiconductor electric coolers (TEC), and the operating currents of the semiconductor coolers of the four types of heat dissipating components 503, 504, 505, and 506 are different, so that the four types of lasers 501a, 501b. 501c and 501d work. The temperature is different.
  • TEC semiconductor electric coolers
  • the four types of lasers 501a, 50 lb, 501c, and 501d may specifically adopt the semiconductor blue laser diode described in the first embodiment, and the planar arrangement may adopt the first and second embodiments.
  • the arrangement of the lasers 101 and 201, and the planar arrangement thereof will not be described herein.
  • the semiconductor refrigerator corresponding to each type of heat dissipating components 503, 504, 505, 506 can be applied with different currents A1 ⁇ A4 (for example, 3A, 5A 7A, 9A), so that the heat dissipating component 503,
  • the heat dissipation performance of 504, 50 5, and 506 is different in the working state, so that the temperatures of the corresponding lasers 501a, 501b. 501c and 50 Id are different.
  • the semiconductor cooler with a small current has a low heat transfer rate, and the corresponding lasers 5 Ola. 501b. 501c and 501d have relatively high operating temperatures, and the emitted laser light has a longer wavelength.
  • FIG. 11 is a schematic diagram showing the structure and principle of the semiconductor refrigerator.
  • the semiconductor cooler is composed of a pair of electrodes and a pair of P-type and N-type pairs connected to the electrodes, wherein the electrodes and the P-type and N-type galvanic couples may be disposed on the lasers 501a, 501b. 501c. And on the substrate 502 where 501d is located.
  • current When current is passed through the semiconductor chiller, current will transfer heat from one side of the semiconductor chiller to the other. The direction of the current changes its direction of heat conduction, and the current value or number of galvanic couples can change the heat transfer rate of the semiconductor cooler.
  • the number of galvanic couples of the semiconductor cooler of the heat dissipating components 503, 504, 505, 506 may be different, such that the heat dissipating components 503, 504, 505, 506 are
  • the heat dissipation performance is different under working conditions. Therefore, the temperature of different lasers can be controlled by the semiconductor refrigerator to widen the spectrum of the blue light portion, thereby eliminating the difference in reflectance caused by the uneven coating of the reflective bowl.
  • the operating temperatures of the lasers 501a, 501b. 501c and 501d are different by controlling the operating current or the number of galvanic couples of the semiconductor refrigerator, so that the laser light source 500 can be emitted.
  • the spectrum of the laser light source 500 can be adjusted by modulating the operating current of the semiconductor refrigerator, so that the laser light emitted by the laser light source 500 is more suitable.
  • the illuminating spectrum of the laser light source is broadened mainly by providing different types of lasers having different main peaks and different wavelength ranges
  • the third to fifth embodiments are implemented.
  • the illuminating spectrum of the laser light source is broadened by setting the heat sink members with different heat dissipation properties to different temperatures of the different types of lasers.
  • any one of the first and second embodiments may be combined.
  • Embodiments and any one of the third to fifth embodiments enhance different classes by using different types of lasers of different wavelengths of main peaks and different wavelength ranges in combination with different heat dissipation performances under the same conditions of temperature and the like. The difference in wavelength of the laser emitted by the laser.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)

Abstract

L'invention concerne une source de lumière laser (100, 200, 300, 400, 500) et un dispositif de projection (10). La source de lumière laser (100, 200, 300, 400, 500) comprend un substrat (102, 302, 502), des lasers (101a, 101b, 101c, 201a, 201b, 201c, 301a, 301b, 301c, 301d, 401a, 401b, 401c, 401d, 501a, 501b, 501c, 501d) disposés sur le substrat (102, 302, 502) et des éléments de dissipation de chaleur (303, 304, 305, 306, 403, 404, 405, 406, 503, 504, 505, 506) disposés de manière à correspondre aux lasers (101a, 101b, 101c, 201a, 201b, 201c, 301a, 301b, 301c, 301d, 401a, 401b, 401c, 401d, 501a, 501b, 501c, 501d). Les lasers (101a, 101b, 101c, 201a, 201b, 201c, 301a, 301b, 301c, 301d, 401a, 401b, 401c, 401d, 501a, 501b, 501c, 501d) émettent une lumière laser ayant la même plage de longueurs d'onde dans un état de fonctionnement à la même température. Les éléments de dissipation de chaleur (303, 304, 305, 306, 403, 404, 405, 406, 503, 504, 505, 506) comprennent au moins deux types d'éléments de dissipation de chaleur qui sont actionnés indépendamment : un premier type d'élément de dissipation de chaleur (303) et un deuxième type d'élément de dissipation de chaleur (304). Les lasers (101a, 101b, 101c, 201a, 201b, 201c, 301a, 301b, 301c, 301d, 401a, 401b, 401c, 401d, 501a, 501b, 501c, 501d) sont classés de manière correspondante en au moins deux types de lasers : un premier type de laser (101a, 201a, 301a, 401a, 501a) dont la chaleur est dissipée par le premier type d'élément de dissipation de chaleur (303) et un deuxième type de laser (101b, 201b, 301b, 401b, 501b) dont la chaleur est dissipée par le deuxième type d'élément de dissipation de chaleur (304). Le premier type d'élément de dissipation de chaleur (303) et le deuxième type d'élément de dissipation de chaleur (304) ont des propriétés de dissipation de chaleur différentes dans leur état de fonctionnement, de sorte que le premier type de laser (101a, 201a, 301a, 401a, 501a) et le deuxième type de laser (101b, 201b, 301b, 401b, 501b) ont des températures différentes dans leur état de fonctionnement. Le spectre lumineux de la lumière laser finalement émise par la source de lumière laser (100, 200, 300, 400, 500) est plus large que celui de la lumière laser émise par l'un ou l'autre du premier type de laser (101a, 201a, 301a, 401a, 501a) et du deuxième type de laser (101b, 201b, 301b, 401b, 501b).
PCT/CN2017/109325 2016-12-30 2017-11-03 Source de lumière laser et dispositif de projection WO2018121059A1 (fr)

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CN109213231B (zh) * 2018-08-17 2022-01-14 奥比中光科技集团股份有限公司 温度控制系统
CN112748633B (zh) * 2019-10-29 2023-01-13 青岛海信激光显示股份有限公司 一种激光光源和激光投影设备

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