A projector optical device, a control method, and a projector

Abstract

Embodiments of the present invention provide a projector optical device, a control method, and a projector, relating to the field of projectors. The projector optical device includes a first light source, a second light source, a green light source, a first optical channel component, a second optical channel component, and a first polarization beam splitter. One of the first light source and the second light source is an external red light source, and the other is a blue light source. Both the first light source and the second light source are disposed on the light incident side of the first optical channel component. The first optical channel component is configured to convert monochromatic red light or monochromatic blue light into a first optical image light ray. The green light source is disposed on the light incident side of the second optical channel component to emit monochromatic green light with image information to the second optical channel component. The second optical channel component is configured to convert the monochromatic green light into a second optical image light ray. The first polarization beam splitter is configured to synthesize the first optical image light ray and the second optical image light ray into a composite image light ray. The display brightness of the projector is improved.

Description

Technical Field

[0001] The present invention relates to the field of projectors, and more particularly, to a projector optical device, a control method, and a projector. Background Art

[0002] A projector, also known as a projection display, is a device that can project images or videos onto a screen and can be connected to a computer, VCD, DVD, BD, game console, DV, etc. through different interfaces to play corresponding video signals. Projectors are widely used in homes, offices, schools, and entertainment venues. According to different working methods, there are different types such as CRT, LCD, DLP, and LCOS.

[0003] However, the display brightness of existing projectors is not high, which affects the display effect. Summary of the Invention

[0004] The objectives of the present invention include, for example, providing a projector optical device and a projector that can improve the display brightness of the projector to improve the display effect.

[0005] Embodiments of the present invention may be implemented as follows:

[0006] In a first aspect, the present invention provides a projector optical device, including a first light source, a second light source, a green light source, a first optical channel assembly, a second optical channel assembly, and a first polarization beam splitter; one of the first light source and the second light source is a red light source that generates monochromatic red light, and the other is a blue light source that generates monochromatic blue light; both the first light source and the second light source are disposed on the light incident side of the first optical channel assembly to emit the monochromatic blue light or the monochromatic red light with image information to the first optical channel assembly, and the first optical channel assembly is configured to convert the monochromatic red light or the monochromatic blue light into a first optical image light corresponding to the monochromatic red light or the monochromatic blue light and project the first optical image light to the first polarization beam splitter; the green light source is disposed on the light incident side of the second optical channel assembly to emit monochromatic green light with image information to the second optical channel assembly, and the second optical channel assembly is configured to convert the monochromatic green light into a second optical image light corresponding to the monochromatic green light and project the second optical image light to the first polarization beam splitter; the first polarization beam splitter is configured to synthesize the first optical image light and the second optical image light into a composite image light.

[0007] In an alternative embodiment, the first optical channel assembly includes a second polarization beam splitter and a first LCOS device, and the second optical channel assembly includes a third polarization beam splitter and a second LCOS device; the second polarization beam splitter is disposed on the light output directions of the first light source and the second light source, and the second polarization beam splitter is configured to receive the monochromatic red light and the monochromatic blue light, so that the monochromatic red light or the monochromatic blue light is projected onto the first LCOS device, and the first LCOS device converts the monochromatic red light or the monochromatic blue light into the first optical image light, and the first optical image light is projected by the second polarization beam splitter to the first polarization beam splitter; the third polarization beam splitter is disposed on the light output direction of the green light source, and the third polarization beam splitter is configured to receive the monochromatic green light emitted by the green light source and project the monochromatic green light onto the second LCOS device, and the second LCOS device is configured to convert the monochromatic green light into the second optical image light, and the second optical image is projected by the third polarization beam splitter to the first polarization beam splitter.

[0008] In an alternative embodiment, the projection optical device further includes a controller, and the controller is electrically connected to the first light source, the second light source, the green light source, the first LCOS device, and the second LCOS device respectively; the controller is configured to control the first light source and the second light source to alternately emit the monochromatic red light or the monochromatic blue light corresponding to the external input image information according to the external input image information; the controller is further configured to control the green light source to continuously emit the monochromatic green light corresponding to the external input image information according to the external input image information; alternatively, the controller is further configured to control the green light source to emit the monochromatic green light when the first light source or the second light source emits the monochromatic red light or the monochromatic blue light according to the external input image information; the controller is further configured to control the first LCOS device to convert the monochromatic red light or the monochromatic blue light into the first optical image light corresponding to the external input image information according to the external input image information; the controller is further configured to control the second LCOS device to convert the monochromatic green light into the second optical image light corresponding to the external input image information according to the external input image information.

[0009] In an alternative embodiment, the first optical channel assembly includes a dichroic mirror, and the second optical channel assembly includes a first reflector; the dichroic mirror is disposed on the light output directions of the first light source and the second light source, and the dichroic mirror is configured to receive the monochromatic red light or the monochromatic blue light and project the monochromatic red light or the monochromatic blue light onto the second polarization beam splitter; the first reflector is disposed on the light output direction of the green light source so that the monochromatic green light is projected onto the third polarization beam splitter.

[0010] In an alternative embodiment, the first optical channel assembly includes a second reflecting mirror. The first light source and the second light source are arranged in parallel. The dichroic mirror is arranged corresponding to the second light source, so that the light of the second light source passes through the dichroic mirror and is projected onto the first polarization beam splitter. The second reflecting mirror is arranged in the light emitting direction of the first light source, so that the light of the first light source is reflected by the second reflecting mirror and the dichroic mirror and projected onto the second polarization beam splitter.

[0011] In an alternative embodiment, the first optical channel assembly includes a first spot adapter lens and a first filter, and the second optical channel assembly includes a second spot adapter lens and a second filter; the first spot adapter lens and the first filter are sequentially arranged between the dichroic mirror and the second polarization beam splitter; the first spot adapter lens is arranged between the dichroic mirror and the first filter, so that the monochromatic red light or the monochromatic blue light is shaped with the first LCS device; the first filter is arranged between the first spot adapter lens and the second polarization beam splitter, so that one of the P-polarized light or the S-polarized light in the monochromatic red light or the monochromatic blue light passes through and is projected onto the second polarization beam splitter; the second spot adapter lens is arranged between the green light source and the first reflecting mirror, so that the monochromatic green light is shaped with the second LCOS device; the second filter is arranged between the first reflecting mirror and the third polarization beam splitter, so that one of the P-polarized light or the S-polarized light in the monochromatic green light passes through and is projected onto the third polarization beam splitter.

[0012] In an alternative embodiment, the first optical channel assembly includes a third filter, and the second optical channel assembly includes a fourth filter; the third filter is arranged between the second polarization beam splitter and the first polarization beam splitter to filter the first optical image light; the fourth filter is arranged between the third polarization beam splitter and the first polarization beam splitter to filter the second optical image light.

[0013] In an alternative embodiment, the projection optical device includes a field lens and an imaging lens. The field lens and the imaging lens are sequentially arranged on the light emitting side of the first polarization beam splitter. The field lens is used to project the composite image light onto the imaging lens, so that the imaging lens projects the image onto the display device.

[0014] In a second aspect, the present invention provides a control method for a projection optical device, which is applied to the projection optical device described in any one of the foregoing embodiments. The control method includes the following steps:

[0015] Control the first light source and the second light source to be lit at intervals within a display period, control the green light source to be constantly lit, or control the green light source to be lit simultaneously with the first light source or the second light source.

[0016] In a third aspect, the present invention provides a projector, including the projector optical device according to any one of the foregoing embodiments; or, a control method applying the projector optical device according to the foregoing embodiment.

[0017] The beneficial effects of a projector optical device, a control method and a projector provided by the embodiments of the present invention include:

[0018] In this application, the first light source and the second light source are arranged on the light incident side of the first light channel component. The first light channel component is used to convert the monochromatic red light or monochromatic blue light emitted by the first light source or the second light source into a first optical image light ray, and project the first optical image light ray onto the first polarization beam splitter. Then, the green light source is arranged on the light incident side of the second light channel component. The second light channel component is used to convert the monochromatic green light into a second optical image light ray, and project the second optical image light ray onto the first polarization beam splitter. The first polarization beam splitter is used to synthesize the first optical image light ray and the second optical image light ray into a composite image light ray. Since the composite image light ray is formed by superimposing and combining the first optical image light ray and the second optical image light ray, the brightness of the composite light ray is higher. Also, the display time of the primary green light, monochromatic red light and primary blue light can be increased within a display time period, resulting in a better display effect, and the requirement for the refresh rate is reduced. At the same time, since the monochromatic green light has a greater impact on the brightness of the projector, arranging the green light source in a separate light channel allows the green light source to be constantly lit, making the proportion of the display time of the primary green light in the display time period higher, enhancing the brightness of the projector and making the display effect of the projector better. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of a projector provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a projector optical device provided by this embodiment;

[0022] Figure 3 It is a control timing diagram of a projector optical device provided by this embodiment;

[0023] Figure 4 The controller logic block diagram provided for this embodiment.

[0024] Icons: 100 - Projection optical device; 110 - First light source; 130 - Second light source; 150 - Green light source; 170 - First optical channel component; 171 - Second polarization beam splitter; 173 - First LCOS device; 175 - Dichroic mirror; 177 - Second reflector; 179 - First spot adapter lens; 181 - First filter; 183 - Third filter; 190 - Second optical channel component; 191 - Third polarization beam splitter; 193 - Second LCOS device; 195 - First reflector; 197 - Second spot adapter lens; 199 - Second filter; 201 - Fourth filter; 210 - First polarization beam splitter; 230 - Controller; 231 - Decoding board; 232 - Logic master control unit; 233 - Modulation control area; 234 - Image channel selection area; 235 - Internal test image storage area; 236 - SDRAM area; 237 - First channel; 238 - Second channel; 239 - Third channel; 240 - Write select channel; 241 - Full-frame image storage area; 242 - Read select channel; 243 - First full-frame image storage area; 244 - Second full-frame image storage area; 250 - Field lens; 270 - Imaging lens; 300 - Projector; 310 - Housing; 311 - Mounting hole. Detailed implementation manners

[0025] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. The components of the embodiments of the present invention usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but is merely representative of selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0028] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0029] In addition, if terms such as "first", "second", etc. are only used for distinguishing descriptions, they cannot be understood as indicating or implying relative importance.

[0030] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0031] Through research by the applicant, it is found that the primary green light has a great influence on the brightness display of the projector during the display process of the projector 300. During an image display time period, the higher the proportion of the display time of the primary green light, the brighter the image.

[0032] Please refer to Figure 1 , this embodiment provides a projector 300, which can improve the display brightness of the projector 300 to improve the display effect of the projector 300.

[0033] In this embodiment, the projector 300 includes a housing 310 and a projector optical device 100 disposed in the housing 310. The projector optical device 100 is used to project an image onto a display device (not shown in the figure).

[0034] Such as Figure 2As shown, in this embodiment, the projector optical device 100 includes a first light source 110, a second light source 130, a green light source 150, a first optical channel assembly 170, a second optical channel assembly 190, and a first polarization beam splitter 210. One of the first light source 110 and the second light source 130 is a red light source that generates monochromatic red light, and the other is a blue light source that generates monochromatic blue light. The first light source 110 and the second light source 130 are arranged on the light incident side of the first optical channel assembly 170 to emit monochromatic blue light or monochromatic red light with image information to the first optical channel assembly 170. The first optical channel assembly 170 is configured to convert the monochromatic red light or monochromatic blue light into a first optical image light corresponding to the monochromatic red light or monochromatic blue light, and project the first optical image light to the first polarization beam splitter 210. The green light source 150 is arranged on the light incident side of the second optical channel assembly 190 to emit monochromatic green light with image information to the second optical channel assembly 190. The second optical channel assembly 190 is configured to convert the monochromatic green light into a second optical image light corresponding to the monochromatic green light, and project the second optical image light to the first polarization beam splitter 210. The first polarization beam splitter 210 is configured to synthesize the first optical image light and the second optical image light into a composite image light.

[0035] As Figure 3 shown, in this application, by arranging the first light source 110 and the second light source 130 on the light incident side of the first optical channel assembly 170, the first optical channel assembly 170 is used to convert the monochromatic red light or monochromatic blue light emitted by the first light source 110 or the second light source 130 into a first optical image light, and project the first optical image light to the first polarization beam splitter 210. Then, by arranging the green light source 150 on the light incident side of the second optical channel assembly 190, the second optical channel assembly 190 is used to convert the monochromatic green light into a second optical image light, and project the second optical image light to the first polarization beam splitter 210. The first polarization beam splitter 210 is used to synthesize the first optical image light and the second optical image light into a composite image light. Since the composite image light is formed by superimposing and combining the first optical image light and the second optical image light, the brightness of the composite light is higher, and the display time of the primary green light, monochromatic red light, and primary blue light can also be increased within a display time period, making the display effect better, and also reducing the requirement for the refresh rate. At the same time, since the monochromatic green light has a greater impact on the brightness of the projector 300, arranging the green light source 150 in a separate optical channel enables the green light source 150 to be continuously lit, so that the proportion of the display time of the primary green light within the display time period is higher, enhancing the brightness of the projector and making the display effect of the projector 300 better.

[0036] It should be noted that since the projection of the projector 300 is controlled according to the externally input image information, after the first light source 110 or the second light source 130 generates monochromatic red light or monochromatic blue light according to the externally input image information and enters the first optical channel component 170, the first optical channel component 170 needs to modulate the monochromatic red light or monochromatic blue light according to the externally input image information and change the brightness of the pixels, and then output the first optical image light with image information. After the green light source 150 generates monochromatic green light according to the externally input image information and enters the second optical channel component 190, the second optical channel component 190 needs to modulate the monochromatic green light according to the externally input image information and change the brightness of the pixels, and then output the second optical image light with image information. Since the first polarization beam splitter 210 has the transmissivity of P-polarized light and the reflectivity of S-polarized light, one of the first light image light and the second light image light is transmitted and the other is reflected, so that the first optical image light and the second optical image light are emitted from the same side of the first polarization beam splitter 210, thereby realizing the combination of the first optical image and the second optical image.

[0037] As Figure 2 shown, in this embodiment, the first optical channel component 170 includes a second polarization beam splitter 171 and a first LCOS device 173, and the second optical channel component 190 includes a third polarization beam splitter 191 and a second LCOS device 193. The second polarization beam splitter 171 is disposed in the light emission direction of the first light source 110 and the second light source 130. The second polarization beam splitter 171 is used to receive the monochromatic red light and the monochromatic blue light, so that the monochromatic red light or the monochromatic blue light is projected onto the first LCOS device 173. The first LCOS device 173 converts the monochromatic red light or the monochromatic blue light into the first optical image light, and the first optical image light is projected by the second polarization beam splitter 171 to the first polarization beam splitter 210. The third polarization beam splitter 191 is disposed in the light emission direction of the green light source 150. The third polarization beam splitter 191 is used to receive the monochromatic green light emitted by the green light source 150 and project the monochromatic green light onto the second LCOS device 193. The second LCOS device 193 is used to convert the monochromatic green light into the second optical image light, and the second optical image is projected by the third polarization beam splitter 191 to the first polarization beam splitter 210.

[0038] Since the first LCOS device 173 and the second LCOS device 193 are also referred to as liquid crystal on silicon. Both the first LCOS device 173 and the second LCOS device 193 include a glass substrate, a liquid crystal layer, and a silicon layer in sequence. A mirror is formed on the surface of the silicon layer. The monochromatic red light or monochromatic blue light emitted by the first light source 110 or the second light source 130 will be decomposed into P-polarized light and S-polarized light perpendicular to each other when passing through the second polarization beam splitter 171. The P-polarized light will pass through the second polarization beam splitter 171, and the S-polarized light will be reflected by the second polarization beam splitter 171. Therefore, only one of the decomposed P-polarized light or S-polarized light enters the first LCOS device 173.

[0039] In this embodiment, the P-polarized light of the monochromatic red light or monochromatic blue light passes through the second polarization beam splitter 171 and enters the first LCOS device 173. The P-polarized light (obtained by decomposing monochromatic red light or monochromatic blue light) incident from the front of the first LCOS device 173 forms the first image light after changing the pixel brightness and rotating the polarization direction according to the external input image information through the liquid crystal layer. The first image light is transmitted through the liquid crystal layer to the surface of the silicon substrate layer, and then is reflected by the mirror of the silicon substrate layer and emitted from the front of the first LCOS device 173. Since the P-polarized light incident from the front of the first LCOS device 173 changes the polarization direction after being modulated by the liquid crystal layer, the emitted first image light is S-polarized light. Therefore, when the first image light is projected onto the second polarization beam splitter 171, it cannot pass through the second polarization beam splitter 171, and the first image light is reflected by the second polarization beam splitter 171 to the first polarization beam splitter 210 and is reflected and emitted by the first polarization beam splitter 210.

[0040] As Figure 2 shown, in this embodiment, the monochromatic green light emitted by the green light source 150 will be decomposed into P-polarized light and S-polarized light perpendicular to each other when entering the third polarization beam splitter 191. The P-polarized light will pass through the third polarization beam splitter 191, and the S-polarized light will be reflected by the third polarization beam splitter 191. In order for the first polarization beam splitter 210 to combine the first image light and the second image light to form a combined image light, in this embodiment, the second LCOS device 193 is arranged in the emission direction of the S-polarized light.

[0041] In other embodiments of the present application, in order for the first polarization beam splitter 210 to combine the first image light and the second image light to form a combined image light, it may also be that the S-polarized light of the monochromatic blue light or monochromatic red light enters the first LCOS device 173, and the P-polarized light of the monochromatic green light enters the second LCOS device 193. It only needs to adjust the positions of the first LCOS device 173 and the second LCOS device 193 according to the emission direction of the light so that the first LCOS device 173 and the second LCOS device 193 receive the emitted light with different polarization directions.

[0042] As Figure 2 shown, in this embodiment, the S-polarized light of the monochromatic green light incident from the front of the second LCOS device 193 forms a second image light after passing through the liquid crystal layer of the second LCOS device 193 and changing the pixel brightness and rotating the polarization direction according to the externally input image signal. The second image light is transmitted to the surface of the silicon substrate layer through the liquid crystal layer, and then reflected by the reflector of the silicon substrate layer and emitted from the front of the second LCOS device 193. Since the second light changes the polarization direction through the modulation of the liquid crystal layer, the second image light emitted from the second LCOS device 193 is P-polarized light and can pass through the third polarization beam splitter 191 and be projected onto the first polarization beam splitter 210. The second image light projected onto the first polarization beam splitter 210 passes through the first polarization beam splitter 210 and exits from the same side and in the same direction as the first image light of the first polarization beam splitter 210, realizing the combination of the first image light and the second image light.

[0043] Please refer to Figure 3 and Figure 4 , in this embodiment, the projector optical device 100 further includes a controller 230. The controller 230 is electrically connected to the first light source 110, the second light source 130, the green light source 150, the first LCOS device 173, and the second LCOS device 193 respectively. The controller 230 controls the first light source 110 and the second light source 130 to emit monochromatic red light or monochromatic blue light corresponding to the externally input image information at intervals according to the externally input image information. The controller 230 is further configured to control the green light source 150 to emit monochromatic green light when the first light source 110 or the second light source 130 emits monochromatic red light or monochromatic blue light according to the externally input image information. The controller 230 is further configured to control the first LCOS device 173 to convert the monochromatic red light or monochromatic blue light into a first optical image light corresponding to the externally input image information according to the externally input image information. The controller 230 is further configured to control the second LCOS device 193 to convert the monochromatic green light into a second optical image light corresponding to the externally input image information according to the externally input image information.

[0044] By controlling the first light source 110 and the second light source 130 to be lit at intervals by the controller 230, and controlling the green light source 150 to cooperate with the first light source 110 or the second light source 130, the second light source 130 can adjust the white balance of the images driven by the first light source 110 and the second light source 130 respectively. At the same time, such control can make the lighting time values of the first light source 110 and the second light source 130 approach the maximum of 1 / 2 Vs period, and the lighting time value of the green light source 150 approach the maximum of 1 Vs period. Compared with the original maximum of 1 / 3 Vs period, the lighting time values of the first light source 110, the second light source 130, and the green light source 150 are significantly increased, the requirement for the refresh frequency is reduced, the burden on the control driving circuit is greatly reduced, and conditions are provided for broadening other applications of the corresponding driving IC.

[0045] In this embodiment, the controller 230 includes a decoding board 231, which is used to decode the input image for the controller 230 to use. The input image can be from an external storage medium, such as a USB flash drive, a hard disk, a CD, etc., or can be from an electronic device such as a computer or a mobile phone connected. The decoding board 231 can be integrated with the controller 230 or can be an external device connected to the controller 230.

[0046] Please refer to Figure 4, the controller 230 includes a logic master control unit 232 for controlling the first light source 110, the second light source 130, and the green light source 150, and a modulation control area 233 for controlling the first LCOS device 173 and the second LCOS device 193. The logic master control unit 232 is respectively connected to the decoding board 231, the first light source 110, the second light source 130, and the green light source 150. The logic master control unit 232 is configured to control the first light source 110 and the second light source 130 to alternately emit monochromatic blue light or monochromatic red light corresponding to the externally input image information according to the externally input image information transmitted by the decoding board 231. The green light source 150 is controlled to be lit simultaneously with the first light source 110 or the second light source 130. That is, the first light source 110 and the green light source 150 are lit and extinguished simultaneously. The second light source 130 and the green light source 150 are lit and extinguished simultaneously. The modulation control area 233 includes an image channel selection area 234, an internal test image storage area 235, and an SDRAM area 236. The image channel selection area 234 is respectively connected to the decoding board 231, the internal test image storage area 235, and the SDRAM area 236. The image channel selection area 234 is configured to select whether to input the image from the decoding board 231 or the internal test image storage area 235 into the SDRAM area 236. The internal test image storage area 235 stores image information for debugging. The SDRAM area 236 includes a first channel 237, a second channel 238, and a third channel 239. The first channel 237 and the second channel 238 are both connected to the first LCOS device 173. The first channel 237 is configured to store a full-frame image of monochromatic red light and to transmit the stored full-frame image to the first LCOS device 173 when the red light source is lit, so that the first LCOS device 173 brightens the pixel points according to the full-frame image. The second channel 238 is configured to store a full-frame image of monochromatic blue light and to transmit the stored image to the first LCOS device 173 when the blue light source is lit, so that the first LCOS device 173 brightens the pixel points according to the full-frame image. The second channel 238 is configured to store a full-frame image of monochromatic green light and to transmit the stored image to the second LCOS device 193 when the monochromatic green light is lit, so that the second LCOS device 193 brightens the pixel points according to the full-frame image. The first channel 237, the second channel 238, and the third channel 239 each include a write selection channel 240, a full-frame image storage area 241, and a read selection channel 242. The write selection channel 240 is configured to write the input image information into the full-frame image storage area 241. The full-frame image storage area 241 is configured to store the full-frame image. The read selection channel 242 is configured to input the image in the full-frame image storage area 241 into the first LCOS device 173 and the LCOS device. Each full-frame image storage area 241 includes a first full-frame image storage area 243 and a second full-frame image storage area 244. The write selection channel 240 is further configured to write the input image information corresponding to the first full-frame image storage area 243 or the second full-frame image storage area 244.The read selection channel 242 is also used to input the images corresponding to the first full-frame image storage area 243 or the second full-frame image storage area 244 into the first LCOS device 173 and the second LCOS device 193.

[0047] In some other embodiments of the present application, the controller 230 is used to control the green light source 150 to continuously emit monochromatic green light corresponding to the external input image information according to the external input image information. That is, within one VS period, the first light source 110 and the second light source 130 intermittently light up the green light source 150 constantly.

[0048] In this embodiment, the controller 230 is also used to control the first light source 110 and the second light source 130, such that the one emitting monochromatic red light lights up first, and the one emitting monochromatic blue light lights up later.

[0049] Please refer to Figure 2 , in this embodiment, the first optical channel assembly 170 includes a dichroic mirror 175. The dichroic mirror 175 is disposed in the light-emitting directions of the first light source 110 and the second light source 130. The dichroic mirror 175 is used to receive monochromatic red light or monochromatic blue light, and project the monochromatic red light or monochromatic blue light onto the second polarization beam splitter 171.

[0050] The dichroic mirror 175 is also called a two-color mirror. Its characteristic is that it almost completely transmits light of a certain wavelength, and almost completely reflects light of other wavelengths. Thus, the first light source 110 and the second light source 130 are disposed in two directions of the dichroic mirror 175, so that the light rays of the first light source 110 and the second light source 130 can be projected in the same direction after being processed, thereby enabling the light rays of the first light source 110 and the second light source 130 to be projected onto the second polarization beam splitter 171.

[0051] In this embodiment, the second optical channel assembly 190 includes a first reflector 195. The first reflector 195 is disposed in the light-emitting direction of the green light source 150 to project monochromatic green light onto the third polarization beam splitter 191. By providing a second reflector 177, the propagation direction of the monochromatic green light is changed so as to be projected onto the third polarization beam splitter 191.

[0052] Please refer to Figure 2, in this embodiment, the first light source 110 and the second light source 130 are arranged in parallel. The first channel 237 assembly includes a second reflecting mirror 177. The dichroic mirror 175 is arranged corresponding to the second light source 130 so that the light of the second light source 130 passes through the dichroic mirror 175 and is projected onto the first polarization beam splitter 210. The second reflecting mirror 177 is arranged in the light emitting direction of the first light source 110 so that the light of the first light source 110 is reflected by the second reflecting mirror 177 and the dichroic mirror 175 and projected onto the second polarization beam splitter 171. Arranging the first light source 110, the second light source 130, and the third light source in parallel can avoid light pollution and facilitate the arrangement of the first light source 110, the second light source 130, and the green light source 150.

[0053] Please refer to Figure 2 , in this embodiment, the first optical channel assembly 170 includes a first spot adapter lens 179 and a first filter lens 181. The first spot adapter lens 179 and the first filter lens 181 are sequentially arranged between the dichroic mirror 175 and the second polarization beam splitter 171. The first spot adapter lens 179 is arranged between the dichroic mirror 175 and the first filter lens 181 to match the monochromatic red light or monochromatic blue light with the first LCS device. Between the first spot adapter lens 179 and the second polarization beam splitter 171, so that the P-polarized light in the monochromatic red light and the monochromatic blue light passes through and is projected onto the second polarization beam splitter 171. By arranging the first filter lens 181, the S-polarized light in the monochromatic red light or the monochromatic blue light can be filtered in advance, thereby avoiding serious heating of the second polarization beam splitter 171 after two light treatments and improving the contrast of the image.

[0054] Please refer to Figure 2 , in this embodiment, the second optical channel assembly 190 includes a second spot adapter lens 197 and a second filter lens 199. The second spot adapter lens 197 is arranged between the green light source 150 and the first reflecting mirror 195 to match the monochromatic green light with the second LCOS device 193. The second filter lens 199 is arranged between the first reflecting mirror 195 and the third polarization beam splitter 191 to allow the S-polarized light in the monochromatic green light to pass through and be projected onto the third polarization beam splitter 191. By arranging the second filter lens 199, the P-polarized light in the monochromatic green light can be filtered in advance, thereby avoiding serious heating of the third polarization beam splitter 191 after two light treatments and improving the contrast of the image.

[0055] Please refer to Figure 2 , in this embodiment, the first channel 237 assembly includes a third filter lens 183. The third filter lens 183 is arranged between the second polarization beam splitter 171 and the first polarization beam splitter 210 to filter the first optical image light. By arranging the third filter lens 183, the S-polarized light in the first image optics can be filtered, thereby improving the contrast of the image display.

[0056] Please refer to Figure 2 , in this embodiment, the second optical channel component 190 includes a fourth filter lens 201. The fourth filter lens 201 is disposed between the third polarization beam splitter 191 and the first polarization beam splitter 210 to filter the second optical image light. By providing the third filter lens 183, the P-polarized light in the first image optics can be filtered, thereby improving the contrast of the image display.

[0057] In this embodiment, the first filter lens 181, the second filter lens 199, the third filter lens 183, and the fourth filter lens 201 are all polarization glass sheets, and the polarization glass sheets can be rotated according to different polarization directions of the filtered light to obtain S-polarized light or P-polarized light.

[0058] Please refer to Figure 1 and Figure 2 , in this embodiment, the projector optical device 100 includes a field lens 250 and an imaging lens 270. An installation hole 311 is provided on the housing 310. The field lens 250 and the imaging lens 270 are sequentially disposed on the light exit side of the first polarization beam splitter 210, and the imaging lens 270 is fixed in the installation hole 311. The field lens 250 is configured to project the composite image light onto the imaging lens 270, so that the imaging lens 270 projects the image onto the display device.

[0059] An embodiment of the present application further provides a control method for a projector optical device 100. In one VS period, the method includes the following steps:

[0060] Control the first light source 110 and the second light source 130 to be lit at intervals. Control the green light source 150 to be lit simultaneously with the first light source 110 or the second light source 130.

[0061] In some other embodiments of the present application, the control method for the projector optical device 100 may further be:

[0062] Control the first light source 110 and the second light source 130 to be lit at intervals. Control the green light source 150 to be lit simultaneously with the first light source 110 or the second light source 130.

[0063] In this embodiment, the method for controlling the first light source 110 and the second light source 130 to be lit at intervals includes:

[0064] Control the first light source 110 and the second light source 130 that emit monochromatic red light to be lit first, and the first light source 110 and the second light source 130 that emit monochromatic blue light to be lit after the monochromatic red light is extinguished.

[0065] The advantages and beneficial effects of the carmine projector optical device 100, the control method, and the projector 300 provided in this embodiment include:

[0066] By arranging the first light source 110 and the second light source 130 on the light incident side of the first light channel component 170, the first light channel component 170 is used to convert the monochromatic red light or monochromatic blue light emitted by the first light source 110 or the second light source 130 into the first optical image light, and the first optical image light is projected onto the first polarization beam splitter 210. Then, by arranging the green light source 150 on the light incident side of the second light channel component 190, the second light channel component 190 is used to convert the monochromatic green light into the second optical image light, and the second optical image light is projected onto the first polarization beam splitter 210. The first polarization beam splitter 210 is used to synthesize the first optical image light and the second optical image light into a composite image light. Since the composite image light is formed by superimposing and combining the first optical image light and the second optical image light, the brightness of the composite light is higher. Also, the display time of the primary green light, monochromatic red light, and primary blue can be increased within a display time period, resulting in a better display effect and reducing the requirement for the refresh rate. At the same time, since the monochromatic green light has a greater impact on the brightness of the projector 300, arranging the green light source 150 in a separate light channel allows the green light source 150 to be continuously lit, making the proportion of the display time of the primary green light within the display time period higher, enhancing the brightness of the projector and making the display effect of the projector 300 better.

[0067] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A projector optical device, characterized in that, It includes a first light source, a second light source, a green light source, a first optical channel component, a second optical channel component, and a first polarization beam splitter; One of the first light source and the second light source is a red light source that generates monochromatic red light, and the other is a blue light source that generates monochromatic blue light; Both the first light source and the second light source are arranged on the light incident side of the first optical channel component to emit the monochromatic blue light or the monochromatic red light with image information to the first optical channel component. The first optical channel component is used to convert the monochromatic red light or the monochromatic blue light into a first optical image light ray corresponding to the monochromatic red light or the monochromatic blue light, and project the first optical image light ray to the first polarization beam splitter; The green light source is arranged on the light incident side of the second optical channel component to emit monochromatic green light with image information to the second optical channel component. The second optical channel component is used to convert the monochromatic green light into a second optical image light ray corresponding to the monochromatic green light, and project the second optical image light ray to the first polarization beam splitter; The first polarization beam splitter is used to synthesize the first optical image light ray and the second optical image light ray into a composite image light ray; The first optical channel component includes a second polarization beam splitter and a first LCOS device, and the second optical channel component includes a third polarization beam splitter and a second LCOS device; The second polarization beam splitter is arranged on the light exit direction of the first light source and the second light source. The second polarization beam splitter is used to receive the monochromatic red light and the monochromatic blue light, so that the monochromatic red light or the monochromatic blue light is projected onto the first LCOS device. The first LCOS device converts the monochromatic red light or the monochromatic blue light into the first optical image light ray, and the first optical image light ray is projected to the first polarization beam splitter through the second polarization beam splitter; The third polarization beam splitter is arranged on the light exit direction of the green light source. The third polarization beam splitter is used to receive the monochromatic green light emitted by the green light source and project the monochromatic green light onto the second LCOS device. The second LCOS device is used to convert the monochromatic green light into the second optical image light ray, and the second optical image is projected to the first polarization beam splitter through the third polarization beam splitter; The projection optical device of the projector includes a field lens and an imaging lens. The field lens and the imaging lens are sequentially arranged on the light exit side of the first polarization beam splitter. The field lens is used to project the composite image light ray onto the imaging lens, so that the imaging lens projects the image onto the display device.

2. The optical device of a projector according to claim 1, wherein The projection optical device of the projector further includes a controller, and the controller is electrically connected to the first light source, the second light source, the green light source, the first LCOS device, and the second LCOS device respectively; The controller is used to control the first light source and the second light source to emit the monochromatic red light or the monochromatic blue light corresponding to the externally input image information at intervals according to the externally input image information; The controller is further configured to control the green light source to continuously emit the monochromatic green light corresponding to the externally input image information; or, the controller is further configured to control the green light source to emit the monochromatic green light when the first light source or the second light source emits the monochromatic red light or the monochromatic blue light according to the externally input image information; The controller is further configured to control the first LCOS device to convert the monochromatic red light or the monochromatic blue light into the first optical image light corresponding to the externally input image information according to the externally input image information; The controller is further configured to control the second LCOS device to convert the monochromatic green light into the second optical image light corresponding to the externally input image information according to the externally input image information.

3. An optical device for a projector according to claim 1 or 2, characterized in that, The first optical channel assembly includes a dichroic mirror, and the second optical channel assembly includes a first reflector; The dichroic mirror is disposed in the light emitting directions of the first light source and the second light source, and is configured to receive the monochromatic red light or the monochromatic blue light and project the monochromatic red light or the monochromatic blue light onto the second polarization beam splitter; The first reflector is disposed in the light emitting direction of the green light source so that the monochromatic green light is projected onto the third polarization beam splitter.

4. The optical device of a projector according to claim 3, wherein, The first optical channel assembly includes a second reflector. The first light source and the second light source are arranged in parallel. The dichroic mirror is correspondingly disposed with the second light source so that the light of the second light source passes through the dichroic mirror and is projected onto the first polarization beam splitter. The second reflector is disposed in the light emitting direction of the first light source so that the light of the first light source is reflected by the second reflector and the dichroic mirror and projected onto the second polarization beam splitter.

5. An optical device for a projector according to claim 3, characterized in that, The first optical channel assembly includes a first spot adapter lens and a first filter, and the second optical channel assembly includes a second spot adapter lens and a second filter; The first spot adapter lens and the first filter are sequentially disposed between the dichroic mirror and the second polarization beam splitter; The first spot adapter lens is disposed between the dichroic mirror and the first filter so that the monochromatic red light or the monochromatic blue light is shaped with the first LCOS device; The first filter is disposed between the first spot adapter lens and the second polarization beam splitter so that one of the P-polarized light or the S-polarized light in the monochromatic red light or the monochromatic blue light passes through and is projected onto the second polarization beam splitter; The second spot adapter lens is disposed between the green light source and the first reflector so that the monochromatic green light is shaped with the second LCOS device; The second filter is disposed between the first reflector and the third polarization beam splitter so that one of the P-polarized light or the S-polarized light in the monochromatic green light passes through and is projected onto the third polarization beam splitter.

6. The optical device of a projector according to claim 3, wherein, The first optical channel assembly includes a third filter, and the second optical channel assembly includes a fourth filter; The third filter is disposed between the second polarization beam splitter and the first polarization beam splitter to filter the first optical image light; The fourth filter lens is disposed between the third polarization beam splitter and the first polarization beam splitter to filter the second optical image light.

7. A control method for a projector optical device, applied to the projector optical device according to any one of claims 1-6, characterized in that, The control method includes the following steps: Controlling the first light source and the second light source to be lit at intervals within a display period, controlling the green light source to be constantly lit, or controlling the green light source to be lit simultaneously with the first light source or the second light source.

8. A projector, characterized in that, Including the projector optical device according to any one of claims 1-6; or, a control method applying the projector optical device according to claim 7.

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