CN109884850B - Projection device - Google Patents
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- CN109884850B CN109884850B CN201711279762.XA CN201711279762A CN109884850B CN 109884850 B CN109884850 B CN 109884850B CN 201711279762 A CN201711279762 A CN 201711279762A CN 109884850 B CN109884850 B CN 109884850B
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- 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
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Abstract
The present invention relates to a projection device. The projection equipment is provided with a first mode and a second mode and comprises a light source device, a wavelength conversion device and a spatial light modulator, wherein the light source device is used for emitting first light and second light, and the second light is blue light; the wavelength conversion device is used for receiving the first light to generate excited light with a color different from that of the second light; the spatial light modulator is used for modulating the stimulated light and the second light or the converted light of the stimulated light and the second light according to image data to generate image light, and the converted light is blue light. The power ratio of the second light or the converted light to the stimulated light when the projection device is in the second mode is smaller than the power ratio of the second light or the converted light to the stimulated light when the projection device is in the first mode.
Description
Technical Field
The invention relates to the technical field of projection display, in particular to projection equipment.
Background
Studies have shown that blue light may have an effect on the human eye: firstly, the visual fatigue is increased due to the over-high content of blue light, and secondly, the physiological development of eyes is influenced; and thirdly, under the light environment for a long time, the possibility of inducing macular degeneration of the human eyes is increased when the human eyes are aged. Therefore, how to improve the damage of blue light to human eyes is an important issue in the field of projection display. With the increasing attention paid to blue light hazards, countries have also begun to set up relevant safety standards for blue light hazards to reduce blue light hazards in products.
In particular, in the field of laser projection, laser projection is increasingly favored due to its advantages of long lifetime, high brightness, and the like, however, the current light source for exciting projection generally adopts a blue laser light source to provide a blue light source, and simultaneously adopts a technology of exciting a wavelength conversion material with blue laser to generate light of other colors, such as excitation of a green wavelength conversion material with blue laser to generate required green light, excitation of a red wavelength conversion material to generate required red light, excitation of a yellow wavelength conversion material to generate required red light and green light, and the like. Therefore, in a white light source formed by mixing laser and fluorescence, the bandwidth of blue light is narrow, the power of blue light may be higher in the whole visible light spectrum range, and the ratio of the non-blue light spectrum peak to the blue light spectrum peak may also be smaller, so that the damage to human eyes may be larger, and improvement is needed.
Disclosure of Invention
In order to solve the technical problem that the blue light of the existing projection equipment causes damage to human eyes, the invention provides the projection equipment which can improve the damage of the blue light to the human eyes.
A projection device having a first mode and a second mode, the projection device comprising:
the light source device is used for emitting first light and second light, and the second light is blue light;
the wavelength conversion device is used for receiving the first light to generate excited light with a color different from that of the second light; and
the spatial light modulator is used for modulating the stimulated light and the second light or the converted light of the stimulated light and the second light according to image data to generate image light, and the converted light is blue light;
wherein a power ratio of the second light to the stimulated light when the projection apparatus is in the second mode is smaller than a power ratio of the second light to the stimulated light when the projection apparatus is in the first mode, or a power ratio of the converted light to the stimulated light when the projection apparatus is in the second mode is smaller than a power ratio of the converted light to the stimulated light when the projection apparatus is in the first mode.
Compared with the prior art, the projection device has two modes, namely a second mode and a first mode, and in the second mode, the power ratio of the second light to the stimulated light is smaller than that of the second light to the stimulated light when the projection device is in the first mode; or the ratio of the power of the converted light to the power of the received laser light is smaller than that of the converted light to the power of the received laser light when the projection device is in the first mode, so that the proportion of the blue image light can be reduced when the projection device is in the second mode, the harm of the blue light to human eyes is reduced, and the purpose of protecting eyes is achieved.
Drawings
Fig. 1 is a schematic structural diagram of a projection apparatus according to a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a projection apparatus according to a second embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a projection apparatus according to a third embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a light splitting and combining element of the projection apparatus shown in fig. 3.
Fig. 5 is a schematic structural diagram of a projection apparatus according to a fourth embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a projection apparatus according to a fifth embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a projection apparatus according to a sixth embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a projection apparatus according to a seventh embodiment of the present invention.
Description of the main elements
Light splitting and combining element 150, 160, 250, 350, 550, 650, 750
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
Referring to fig. 1, fig. 1 is a schematic structural diagram of a projection apparatus 100 according to a first embodiment of the invention. The projection apparatus 100 includes a light source device 110, a wavelength conversion device 120, a spatial light modulator 130, and a lens 140. Projection device 100 has two modes, a first mode and a second mode, when in operation. It is understood that the switching between the first mode and the second mode may be implemented by a user operating a mechanical key or an interface operation menu displayed by the projection apparatus 100, which is not described herein in detail. The first mode can be a normal mode, namely a common display mode, and the second mode is an eye protection mode, namely a mode which is different from the normal mode and is beneficial to human eye protection.
The light source device 110 is configured to emit light source light, which includes a first light and a second light, and the second light is blue light. The wavelength conversion device 120 is used for receiving the first light to generate excited light with a color different from that of the second light. The spatial light modulator 130 is used for modulating the stimulated light and the second light according to the image data to generate image light. The lens 140 receives the image light generated by the spatial light modulator 130 and projects the image light to a predetermined position or a predetermined element (such as a projection screen or a wall, etc.) to display a projected image. The power ratio of the second light to the stimulated light when the projection apparatus 100 is in the second mode is smaller than the power ratio of the second light to the stimulated light when the projection apparatus 100 is in the first mode.
Specifically, in the present embodiment, the light source device 110 includes a first light source 111, a second light source 112, and a light source driver 113. The light source driver 113 is electrically connected to the first light source 111 and the second light source 112. The first light source 111 is configured to emit a first light, the second light source 112 is configured to emit a second light, and the light source driver 113 is configured to emit a driving signal to control driving currents of the first light source 111 and the second light source 112 so as to control powers of the first light and the second light emitted by the first light source 111 and the second light source 112. In the present embodiment, the first light source 111 is a blue laser light source, and the second light source 112 is also a blue laser light source. Of course, in other embodiments, the first light source 111 may also use UV light or the like.
Further, in this embodiment, the light source driver 113 controls the driving current of the second light source 112 when the projection apparatus 100 is in the second mode to be smaller than the driving current of the second light source 112 when the projection apparatus 100 is in the first mode, so that the power ratio of the second light to the stimulated light when the projection apparatus 100 is in the second mode is smaller than the power ratio of the second light to the stimulated light when the projection apparatus 100 is in the first mode. In particular, it is understood that the light source driver 113 may control the driving current of the first light source 111 when the projection device is in the second mode to be equal to the driving current of the first light source 111 when the projection device is in the first mode.
Furthermore, in this embodiment, by controlling the first light source 111 and the second light source 112 by the light source driver 113, when the projection apparatus 100 is in the second mode, the ratio of the power of the second light to the sum of the power of the second light and the power of the stimulated light is less than 20%, and the ratio of the peak value of the stimulated light to the peak value of the second light is greater than or equal to 50%, so as to reduce blue light and achieve a better effect of protecting human eyes.
Still further, in this embodiment, the wavelength conversion device 120 is a reflective wavelength conversion device, the projection apparatus 100 further includes a first light splitting and combining element 150 and a second light splitting and combining element 160, the first light splitting and combining element 150 is configured to receive the first light emitted by the first light source 111 and guide the first light to the wavelength conversion device 120, the wavelength conversion device 120 is configured to receive the first light to generate a received laser light, and guide the received laser light to the second light splitting and combining element 160 through the first light splitting and combining element 150, the second light source 112 is configured to emit the second light to the second light splitting and combining element 160, and the second light splitting and combining element 160 is configured to guide the received laser light and the second light to the spatial light modulator 130. Specifically, the second light splitting and combining element 160 may reflect the stimulated light to the spatial light modulator 130 and transmit the second light to the spatial light modulator 130. It is understood that the first light splitting and combining element 150 may reflect the first light, that is, the first light is guided to the wavelength conversion device 120, the received laser light generated by the wavelength conversion device 120 may be further transmitted to the second light splitting and combining element 160 by the first light splitting and combining element 150, and the received laser light is further reflected to the spatial light modulator 130 by the second light splitting and combining element 160.
It is understood that the wavelength conversion device 120 is provided with a wavelength conversion material, the first light excites the wavelength conversion material to generate the stimulated light, specifically, the wavelength conversion material may be a yellow wavelength conversion material or a red and green wavelength conversion material, etc. for generating yellow light, or red light, green light, etc. as the stimulated light, wherein it is understood that the stimulated light and the second light have different wavelengths and thus different colors, and the mixed light (which may be white light) of the stimulated light and the second light includes rgb three primary colors of light, so that the spatial light modulator 130 may modulate the stimulated light and the second light according to the image data to generate the image light required for projecting the display image.
The spatial light modulator 130 may be a single-chip type, a two-chip type or a three-chip type, when the spatial light modulator is a single-chip type, red, green and blue light enters the spatial light modulator in a time sequence, and the spatial light modulator emits light of three colors in a time sequence modulation manner; when the two-piece spatial light modulator is used, one spatial light modulator can modulate blue light and green light, the other spatial light modulator can modulate red light, or one spatial light modulator can modulate blue light and red light, and the other spatial light modulator can modulate green light; when the three-chip spatial light modulator is used, red light, green light and blue light respectively enter the three spatial light modulators, and the three colors of light do not need to be modulated in a time division sequence. Spatial light modulator 130 may be a DMD, LCD, or the like.
Compared with the prior art, in the projection device 100 of the present invention, the projection device 100 has two modes, i.e., the second mode and the first mode, and the power ratio of the second light to the received laser light is smaller than the power ratio of the second light to the received laser light when the projection device 100 is in the first mode, so that the proportion of the blue image light in the second mode of the projection device 100 can be reduced, and further, the harm of the blue light to human eyes can be reduced, and the purpose of protecting eyes can be achieved.
Furthermore, the ratio of the power of the second light to the sum of the power of the second light and the power of the stimulated light is less than 20%, and the ratio of the peak value of the stimulated light to the peak value of the second light is greater than or equal to 50%, so that the damage of blue to human eyes can be effectively improved, and the aim of protecting eyes is fulfilled.
In addition, referring to fig. 1, in a first modified embodiment of the first embodiment, the light source driver 113 controls the driving current of the first light source 111 when the projection apparatus 100 is in the second mode to be larger than the driving current of the first light source 111 when the projection apparatus 100 is in the first mode, so that the power ratio of the second light to the excited light when the projection apparatus 100 is in the second mode is smaller than the power ratio of the second light to the excited light when the projection apparatus 100 is in the first mode. Specifically, it is understood that, in the first modified embodiment, the light source driver 113 may control the driving current of the second light source 112 when the projection apparatus 100 is in the second mode to be equal to the driving current of the second light source 112 when the projection apparatus 100 is in the first mode.
Referring to fig. 1, in a second modified embodiment of the first embodiment, the light source driver 113 controls the driving current of the second light source 112 when the projection apparatus 100 is in the second mode to be smaller than the driving current of the second light source 112 when the projection apparatus 100 is in the first mode, and the light source driver 113 further controls the driving current of the first light source 111 when the projection apparatus 100 is in the second mode to be larger than the driving current of the first light source 111 when the projection apparatus 100 is in the first mode, so that the power ratio of the second light to the stimulated light when the projection apparatus 100 is in the second mode is smaller than the power ratio of the second light to the stimulated light when the projection apparatus 100 is in the first mode.
Referring to fig. 1, in a third modified embodiment of the first embodiment, the second light source 112 may be a blue LED light source, and the blue light emitted by the blue LED light source has a wider wavelength range and a lower peak than the blue light emitted by the blue laser light source, so that the blue light can be reduced and the eyes can be protected more easily.
Referring to fig. 2, fig. 2 is a block diagram of a projection apparatus 200 according to a second embodiment of the present invention. The projection apparatus 200 of the second embodiment is substantially the same as the projection apparatus 100 of the first embodiment, that is, the above description about the projection apparatus 100 of the first embodiment can be basically applied to the projection apparatus 200 of the second embodiment, and the main differences are mainly that: the position of the second light source 212, the structure of the wavelength conversion device 220, the number of the light splitting and combining elements 250, and the optical path of the projection apparatus 200 are different from those in the first embodiment.
Specifically, in the second embodiment, the wavelength conversion device 220 is a transmissive wavelength conversion device, the first light source 211 is configured to emit first light to the wavelength conversion device 220, the wavelength conversion device 220 is configured to receive the first light to generate received laser light and transmit the received laser light to the light splitting and combining element 250, the second light source 212 is configured to emit second light to the light splitting and combining element 250, and the light splitting and combining element 250 is configured to guide the received laser light and the second light to the spatial light modulator 230. Compared with the first embodiment, the projection device 200 of the second embodiment can also make the power ratio of the second light to the received laser light smaller than the power ratio of the second light to the received laser light when the projection device 200 is in the first mode through different structures and light paths, so that the proportion of the blue image light can be reduced in the second mode of the projection device 200, further the harm of the blue light to human eyes is reduced, and the purpose of protecting eyes is achieved.
Referring to fig. 3, fig. 3 is a block diagram of a projection apparatus 300 according to a third embodiment of the present invention. The projection apparatus 300 of the third embodiment is substantially the same as the projection apparatus 100 of the first embodiment, that is, the above description about the projection apparatus 100 of the first embodiment can be basically applied to the projection apparatus 300 of the third embodiment, and the difference therebetween is mainly that: the positions of the first light source 311 and the second light source 312, the structure of the wavelength conversion device 320, the number and the structure of the light splitting and combining elements 350, and the optical path of the projection apparatus 300 are different from those in the first embodiment.
Specifically, in the third embodiment, the wavelength conversion device 320 is a reflective wavelength conversion device, a first wavelength conversion material for receiving the first light-generating stimulated light and a second wavelength conversion material for receiving the second light-generating converted light are disposed on the wavelength conversion device 320, and the first wavelength conversion material and the second wavelength conversion material may be disposed in different regions of the wavelength conversion device 320.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the light splitting and combining element 350 of the projection apparatus 300 shown in fig. 3. The light splitting and combining element 350 includes a first region 351 and a second region 352. The first region 351 may be located at the periphery of the second region 352, the second region 352 may be located at the center of the first region 351, the first region 351 may be a reflective region for reflecting the excited light and the converted light, and the second region 352 may be a region for transmitting blue light and reflecting yellow light (including red light and green light).
In the third embodiment, the first light is guided to the wavelength conversion device 320 through the second region 352, the second light is guided to the wavelength conversion device 320 through the second region 352, the wavelength conversion device 320 receives the first light to generate the received laser light and guides the received laser light to the first region 351 of the light splitting and combining element 350, the wavelength conversion device 320 also receives the second light to generate the converted light and guides the converted light to the first region 351 of the light splitting and combining element 350, and the first region 351 of the light splitting and combining element 350 is used for guiding the received laser light and the converted light to the spatial light modulator 330, wherein the converted light is blue light, and the wavelength range of the converted light is wider than the second light and has a smaller peak value than the second light. Further, the spatial light modulator 330 is configured to modulate the converted light of the stimulated light and the second light according to the image data to generate the image light. It is understood that the second region 352 can transmit the first light and the second light, i.e., the first light and the second light are guided to the wavelength conversion device 320, and the wavelength conversion device 320 can reflect the generated converted light to the first region 351, i.e., the converted light is guided to the first region 351.
In the third embodiment, the power ratio of the converted light to the stimulated light when the projection apparatus 300 is in the second mode is smaller than the power ratio of the converted light to the stimulated light when the projection apparatus is in the first mode. Further, when the projection apparatus 300 is in the second mode, the ratio of the power of the converted light to the sum of the powers of the converted light and the stimulated light is less than 20%, and the ratio of the peak value of the stimulated light to the peak value of the converted light is greater than or equal to 50%.
In the third embodiment, the second light is converted into the converted light, and although both the second light and the converted light may be blue light, the wavelength range of the converted light may be wider than the wavelength range of the second light and the peak value of the converted light may be smaller than that of the second light, so that the purposes of reducing blue light and protecting human eyes may be achieved more easily.
Referring to fig. 5, fig. 5 is a block diagram of a projection apparatus 400 according to a fourth embodiment of the invention. The projection apparatus 400 of the fourth embodiment is substantially the same as the projection apparatus 300 of the third embodiment, that is, the above description about the projection apparatus 300 of the third embodiment can be basically applied to the projection apparatus 400 of the fourth embodiment, and the main differences are mainly that: the number of the light sources 411 of the light source device 410 is different.
In the fourth embodiment, the light source device 410 includes one light source 411, and the light source 411 may be a blue laser light source or a blue LED light source. The light source 411 may emit the first light and the second light in a time-sharing manner, such as emitting the first light in a first period and emitting the second light in a second period different from the first period, and the light source driver 413 may provide different driving currents to the light source 411 in the first period and the second period, so that a power ratio of the converted light to the stimulated light when the projection apparatus 400 is in the second mode is smaller than a power ratio of the converted light to the stimulated light when the projection apparatus 400 is in the first mode. In the fourth embodiment, the light source device 410 may include one light source 411, which contributes to downsizing, weight saving, cost reduction, and the like of the light source device 410 and the projection apparatus 400.
Referring to fig. 6, fig. 6 is a block diagram of a projection apparatus 500 according to a fifth embodiment of the present invention. The projection apparatus 500 of the fifth embodiment is substantially the same as the projection apparatus 300 of the third embodiment, that is, the above description about the projection apparatus 300 of the third embodiment can be basically applied to the projection apparatus 500 of the fifth embodiment, and the difference therebetween is mainly that: the number of light sources 511 of the light source device 510 and the structure of the wavelength conversion device 520 are different.
In the fifth embodiment, the light source device 510 includes a light source 511, and the first light source 511 can emit the first light and the second light in a time-sharing manner, such as emitting the first light in a first period and emitting the second light in a second period different from the first period. The light source 511 may be a blue laser light source or a blue LED light source.
The wavelength conversion device 520 may be disposed with a first wavelength conversion material for generating the received laser light, the first light is guided (e.g., reflected) to the wavelength conversion device 520 through the second region of the light splitting and combining element 550, the second light is guided (e.g., reflected) to the wavelength conversion device 520 through the second region of the light splitting and combining element 550, the wavelength conversion device 520 receives the first light to generate the received laser light and guides the received laser light to the first region of the light splitting and combining element 550, the wavelength conversion device 520 also receives the second light and guides (e.g., reflects) the second light to the first region of the light splitting and combining element 550, and the first region of the light splitting and combining element 550 guides the received laser light and the second light to the spatial light modulator 530. Further, the spatial light modulator 530 is configured to modulate the stimulated light and the second light according to the image data to generate the image light. The wavelength conversion device 520 may be provided with a scattering material for scattering the second light so as to guide the scattered second light to the first region of the light splitting and combining element 550.
In the fifth embodiment, the light source driver 513 provides different driving currents for the light source 511 in the first period and the second period, so that the power ratio of the second light to the excited light when the projection apparatus 500 is in the second mode is smaller than the power ratio of the second light to the excited light when the projection apparatus 500 is in the first mode. Furthermore, in the fifth embodiment, the ratio of the power of the second light to the sum of the power of the second light and the power of the received light is less than 20%, and the ratio of the peak value of the received light to the peak value of the second light is greater than or equal to 50%, so that the damage of blue to human eyes can be effectively improved, and the purpose of protecting eyes can be achieved.
Referring to fig. 7, fig. 7 is a block diagram of a projection apparatus 600 according to a sixth embodiment of the present invention. The projection apparatus 600 of the sixth embodiment is substantially the same as the projection apparatus 100 of the first embodiment, that is, the above description about the projection apparatus 100 of the first embodiment can be basically applied to the projection apparatus 600 of the sixth embodiment, and the main differences are mainly that: the position of the first light source 611, the position of the second light source 612, the structure of the wavelength conversion device 620, the number of the light splitting and combining elements 650, and the optical path of the projection apparatus 600 are different from those in the first embodiment.
Specifically, in the sixth embodiment, the wavelength conversion device 620 is a transmission and reflection combined wavelength conversion device, the first light source 611 is used for emitting the first light and guiding the first light to the wavelength conversion device 620 through the light splitting and combining element 650, the wavelength conversion device 620 is used for receiving the first light, generating the received laser light and reflecting the received laser light to the light splitting and combining element 650, the second light source 612 is used for emitting the second light to the wavelength conversion device 620, the wavelength conversion device 620 transmits the second light to the light splitting and combining element 650, and the light splitting and combining element 650 is used for guiding the received laser light and the second light to the spatial light modulator 630. Compared with the first embodiment, the projection apparatus 600 of the sixth embodiment can also make the power ratio of the second light to the received laser smaller than the power ratio of the second light to the received laser when the projection apparatus 600 is in the first mode through different structures and light paths, so that the proportion of the blue image light can be reduced in the second mode of the projection apparatus 600, and further, the harm of the blue light to human eyes is reduced, and the purpose of protecting eyes is achieved.
Referring to fig. 8, fig. 8 is a block diagram of a projection apparatus 700 according to a seventh embodiment of the invention. The projection apparatus 700 of the seventh embodiment is substantially the same as the projection apparatus 100 of the first embodiment, that is, the above description about the projection apparatus 100 of the first embodiment can be basically applied to the projection apparatus 700 of the seventh embodiment, and the main differences are mainly that: the position of the first light source 711, the position of the second light source 712, the structure of the wavelength conversion device 720, the number of the light splitting and combining elements 750, and the optical path of the projection apparatus 700 are different from those in the first embodiment.
Specifically, in the seventh embodiment, the wavelength conversion device 720 is a reflective wavelength conversion device, the first light source 711 is configured to emit first light and guide the first light to the wavelength conversion device 720 through the light splitting and combining element 750, the wavelength conversion device 720 is configured to receive the first light to generate a received laser light and reflect the received laser light to the light splitting and combining element 750, and the light splitting and combining element 750 is configured to guide the received laser light to the spatial light modulator 730. The second light source 712 is used to emit a second light to the spatial light modulator 730. Compared with the first embodiment, the projection device 700 of the seventh embodiment can also make the power ratio of the second light to the received laser light smaller than the power ratio of the second light to the received laser light when the projection device 700 is in the first mode through different structures and light paths, so that the proportion of the blue image light can be reduced in the second mode of the projection device 700, and further, the harm of the blue light to human eyes is reduced, and the purpose of protecting eyes is achieved.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (13)
1. A projection device, the projection device having a first mode and a second mode, the projection device comprising:
the light source device is used for emitting first light and second light, and the second light is blue light;
the wavelength conversion device is used for receiving the first light to generate excited light with a color different from that of the second light; and
the spatial light modulator is used for modulating the stimulated light and the second light or the converted light of the stimulated light and the second light according to image data to generate image light, and the converted light is blue light which is generated after the second light is subjected to wavelength conversion and has a different wavelength range from the second light;
wherein a power ratio of the second light to the stimulated light when the projection apparatus is in the second mode is smaller than a power ratio of the second light to the stimulated light when the projection apparatus is in the first mode, or a power ratio of the converted light to the stimulated light when the projection apparatus is in the second mode is smaller than a power ratio of the converted light to the stimulated light when the projection apparatus is in the first mode.
2. The projection device of claim 1, wherein: the light source device comprises a first light source, a second light source and a light source driver, wherein the first light source is used for emitting the first light, the second light source is used for emitting the second light, and the light source driver is used for emitting a driving signal to control the driving current of the first light source and the second light source so as to control the first light and the second light emitted by the first light source and the second light source.
3. The projection device of claim 2, wherein: the light source driver controls a driving current of the first light source when the projection device is in the second mode to be larger than a driving current of the first light source when the projection device is in the first mode.
4. A projection device as claimed in claim 2 or 3, characterized in that: the light source driver controls a driving current of the second light source when the projection device is in the second mode to be smaller than a driving current of the second light source when the projection device is in the first mode.
5. The projection device of claim 2, wherein: the first light source is a blue laser light source, and the second light source is a blue laser light source or a blue LED light source.
6. The projection device of claim 2, wherein: the wavelength conversion device is a reflective wavelength conversion device, the projection apparatus further includes a first light splitting and combining element and a second light splitting and combining element, the first light splitting and combining element is configured to receive first light emitted by the first light source and guide the first light to the wavelength conversion device, the wavelength conversion device is configured to receive the first light to generate the received laser light and guide the received laser light to the second light splitting and combining element through the first light splitting and combining element, the second light source is configured to emit the second light to the second light splitting and combining element, and the second light splitting and combining element is configured to guide the received laser light and the second light to the spatial light modulator.
7. The projection device of claim 2, wherein: the wavelength conversion device is a transmissive wavelength conversion device, the projection apparatus further includes a light splitting and combining element, the first light source is configured to emit the first light to the wavelength conversion device, the wavelength conversion device is configured to receive the first light to generate the received laser light and guide the received laser light to the light splitting and combining element, the second light source is configured to emit the second light to the light splitting and combining element, and the light splitting and combining element is configured to guide the received laser light and the second light to the spatial light modulator.
8. The projection device of claim 1, wherein:
the wavelength conversion device is a reflection type wavelength conversion device, the projection equipment also comprises a light splitting and light combining element with a first area and a second area, the first light is directed to the wavelength conversion device via the second region, the second light is directed to the wavelength conversion device via the second region, the wavelength conversion device is used for receiving the first light to generate the stimulated light and guiding the stimulated light to a first area of the light splitting and combining element, the wavelength conversion device is also used for receiving the second light to generate the converted light and guiding the converted light to the first area of the light splitting and combining element, the light splitting and combining element is used for guiding the received laser light and the converted light to the spatial light modulator, and the wavelength range of the converted light is wider than that of the second light and the peak value of the converted light is smaller than that of the second light; or
The wavelength conversion device is a reflective wavelength conversion device, the projection apparatus further includes a light splitting and combining element having a first region and a second region, the first light is guided to the wavelength conversion device through the second region, the second light is guided to the wavelength conversion device through the second region, the wavelength conversion device is configured to receive the first light to generate the received laser light and guide the received laser light to the first region of the light splitting and combining element, the wavelength conversion device is further configured to receive the second light to guide the received laser light to the first region of the light splitting and combining element, and the light splitting and combining element is configured to guide the received laser light and the second light to the spatial light modulator.
9. The projection device of claim 1 or 8, wherein: the light source device includes a light source emitting the first light during a first period and emitting the second light during a second period different from the first period, and a light source driver providing a different driving current to the light source during the first period and the second period.
10. The projection device of claim 1, wherein: the wavelength conversion device is a transmission and reflection combined wavelength conversion device, the projection apparatus further includes a light splitting and combining element, the first light source is configured to emit the first light and guide the first light to the wavelength conversion device through the light splitting and combining element, the wavelength conversion device is configured to receive the first light and generate the received laser light and reflect the received laser light to the light splitting and combining element, the second light source is configured to emit the second light to the wavelength conversion device, the wavelength conversion device transmits the second light to the light splitting and combining element, and the light splitting and combining element is configured to guide the received laser light and the second light to the spatial light modulator.
11. The projection device of claim 1, wherein: the wavelength conversion device is a reflective wavelength conversion device, the projection apparatus further includes a light splitting and combining element, the first light source is configured to emit the first light and guide the first light to the wavelength conversion device through the light splitting and combining element, the wavelength conversion device is configured to receive the first light to generate the received laser light and reflect the received laser light to the light splitting and combining element, the light splitting and combining element is configured to guide the received laser light to the spatial light modulator, and the second light source is configured to emit the second light to the spatial light modulator.
12. The projection device of claim 1, wherein: when the projection device is in a second mode, a ratio of a power of the second light to a sum of the powers of the second light and the stimulated light is less than 20% or a ratio of a power of the converted light to a sum of the powers of the converted light and the stimulated light is less than 20%.
13. The projection device of claim 1, wherein: when the projection device is in the second mode, the ratio of the peak value of the stimulated light to the peak value of the second light is greater than or equal to 50% or the ratio of the peak value of the stimulated light to the peak value of the converted light is greater than or equal to 50%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711279762.XA CN109884850B (en) | 2017-12-06 | 2017-12-06 | Projection device |
| PCT/CN2018/074725 WO2019109507A1 (en) | 2017-12-06 | 2018-01-31 | Projection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711279762.XA CN109884850B (en) | 2017-12-06 | 2017-12-06 | Projection device |
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| CN109884850A CN109884850A (en) | 2019-06-14 |
| CN109884850B true CN109884850B (en) | 2021-08-24 |
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| CN201711279762.XA Active CN109884850B (en) | 2017-12-06 | 2017-12-06 | Projection device |
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| WO (1) | WO2019109507A1 (en) |
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| CN112443818B (en) * | 2019-08-30 | 2023-04-28 | 深圳市中光工业技术研究院 | Light source system and lighting device |
| CN112967651A (en) * | 2021-03-05 | 2021-06-15 | 深圳市火乐科技发展有限公司 | Display control method and display device |
| CN114995037B (en) * | 2022-06-30 | 2024-06-07 | 青岛海信激光显示股份有限公司 | Projection device and driving method of light source thereof |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152265A (en) * | 1998-11-11 | 2000-05-30 | Matsushita Electric Ind Co Ltd | Color filter and time division color display device using it |
| KR20060080009A (en) * | 2005-01-04 | 2006-07-07 | 엘지전자 주식회사 | Laser light source and scanning display apparatus having the same |
| JP2009053452A (en) * | 2007-08-28 | 2009-03-12 | Panasonic Electric Works Co Ltd | Image projection apparatus |
| CN101466049A (en) * | 2007-12-19 | 2009-06-24 | 索尼株式会社 | Image signal processing apparatus, image signal processing method, image projecting system, image projecting method, and computer program |
| CN101529311A (en) * | 2006-08-23 | 2009-09-09 | 高效光学技术有限公司 | System and method for selective light inhibition |
| CN101945292A (en) * | 2010-09-16 | 2011-01-12 | 青岛海信电器股份有限公司 | Method and device for color range adjustment |
| CN102012614A (en) * | 2010-10-28 | 2011-04-13 | 鸿富锦精密工业（深圳）有限公司 | Projection device with function of automatically adjusting projection brightness and method |
| CN102183869A (en) * | 2011-03-22 | 2011-09-14 | 中国科学院半导体研究所 | Laser projection display system based on full-semiconductor laser |
| CN102207669A (en) * | 2010-03-31 | 2011-10-05 | 卡西欧计算机株式会社 | Light source system and projector |
| CN102566220A (en) * | 2010-12-20 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Protection system and method of projection device |
| CN102645833A (en) * | 2012-05-03 | 2012-08-22 | 山东大学 | Wide-gamut composite light source projection display device and wide-gamut composite light source projection display method |
| CN102645822A (en) * | 2011-11-28 | 2012-08-22 | 深圳市光峰光电技术有限公司 | Projecting apparatus and control method thereof |
| CN103379345A (en) * | 2012-04-26 | 2013-10-30 | 三菱电机株式会社 | Projection type projector |
| CN104335144A (en) * | 2014-09-09 | 2015-02-04 | 华为技术有限公司 | Blue-ray adjusting method, apparatus and terminal |
| CN104685403A (en) * | 2012-10-05 | 2015-06-03 | 日本精机株式会社 | Laser scanning display device |
| CN105911807A (en) * | 2016-06-03 | 2016-08-31 | 青岛海信电器股份有限公司 | Laser projection method and laser projector |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6742892B2 (en) * | 2002-04-16 | 2004-06-01 | Exercise Your Eyes, Llc | Device and method for exercising eyes |
| TW566573U (en) * | 2003-04-09 | 2003-12-11 | Coretronic Corp | Color temperature adjustable projection apparatus |
| CN103411145B (en) * | 2013-08-08 | 2018-07-27 | 复旦大学 | A kind of design method of four-way health LED illumination System |
| CN204943116U (en) * | 2015-07-23 | 2016-01-06 | 北京艾派克蓝科技有限公司 | The green eyeshield intelligent LED desk lamp of a kind of zero radiation no pollution |
| CN105354001B (en) * | 2015-10-23 | 2018-09-14 | 广东欧珀移动通信有限公司 | The eye care method and system of smart machine |
| CN105848003A (en) * | 2016-03-29 | 2016-08-10 | 乐视控股（北京）有限公司 | Eye protection method suitable for display screen and eye protection device suitable for display screen |
| CN107229174A (en) * | 2017-07-14 | 2017-10-03 | 桂林电子科技大学 | A kind of Healthy Lighting method of mobile phone projection lamp |
-
2017
- 2017-12-06 CN CN201711279762.XA patent/CN109884850B/en active Active
-
2018
- 2018-01-31 WO PCT/CN2018/074725 patent/WO2019109507A1/en active Application Filing
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000152265A (en) * | 1998-11-11 | 2000-05-30 | Matsushita Electric Ind Co Ltd | Color filter and time division color display device using it |
| KR20060080009A (en) * | 2005-01-04 | 2006-07-07 | 엘지전자 주식회사 | Laser light source and scanning display apparatus having the same |
| CN101529311A (en) * | 2006-08-23 | 2009-09-09 | 高效光学技术有限公司 | System and method for selective light inhibition |
| JP2009053452A (en) * | 2007-08-28 | 2009-03-12 | Panasonic Electric Works Co Ltd | Image projection apparatus |
| CN101466049A (en) * | 2007-12-19 | 2009-06-24 | 索尼株式会社 | Image signal processing apparatus, image signal processing method, image projecting system, image projecting method, and computer program |
| CN102207669A (en) * | 2010-03-31 | 2011-10-05 | 卡西欧计算机株式会社 | Light source system and projector |
| CN101945292A (en) * | 2010-09-16 | 2011-01-12 | 青岛海信电器股份有限公司 | Method and device for color range adjustment |
| CN102012614A (en) * | 2010-10-28 | 2011-04-13 | 鸿富锦精密工业（深圳）有限公司 | Projection device with function of automatically adjusting projection brightness and method |
| CN102566220A (en) * | 2010-12-20 | 2012-07-11 | 鸿富锦精密工业（深圳）有限公司 | Protection system and method of projection device |
| CN102183869A (en) * | 2011-03-22 | 2011-09-14 | 中国科学院半导体研究所 | Laser projection display system based on full-semiconductor laser |
| CN102645822A (en) * | 2011-11-28 | 2012-08-22 | 深圳市光峰光电技术有限公司 | Projecting apparatus and control method thereof |
| CN103379345A (en) * | 2012-04-26 | 2013-10-30 | 三菱电机株式会社 | Projection type projector |
| CN102645833A (en) * | 2012-05-03 | 2012-08-22 | 山东大学 | Wide-gamut composite light source projection display device and wide-gamut composite light source projection display method |
| CN104685403A (en) * | 2012-10-05 | 2015-06-03 | 日本精机株式会社 | Laser scanning display device |
| CN104335144A (en) * | 2014-09-09 | 2015-02-04 | 华为技术有限公司 | Blue-ray adjusting method, apparatus and terminal |
| CN105911807A (en) * | 2016-06-03 | 2016-08-31 | 青岛海信电器股份有限公司 | Laser projection method and laser projector |
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| Publication number | Publication date |
|---|---|
| WO2019109507A1 (en) | 2019-06-13 |
| CN109884850A (en) | 2019-06-14 |
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