CN215264355U

CN215264355U - Projector optical device and projector

Info

Publication number: CN215264355U
Application number: CN202121934677.4U
Authority: CN
Inventors: 鲜善洪
Original assignee: Chengdu Delipu Photoelectric Technology Co ltd
Current assignee: Chengdu Delipu Photoelectric Technology Co ltd
Priority date: 2021-08-17
Filing date: 2021-08-17
Publication date: 2021-12-21
Anticipated expiration: 2031-08-17

Abstract

An embodiment of the utility model provides a projector optical device and projector relates to the projector field. The projector optical device includes a first light source, a second light source, a green light source, a first light channel assembly, a second light channel assembly, and a first polarizing beamsplitter. 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. The first light source and the second light source are both arranged on the light inlet side of the first light channel assembly. The first light channel assembly is used for converting monochromatic red light or monochromatic blue light into first optical image light. The green light source is arranged on the light inlet side of the second light channel assembly to emit monochromatic green light with image information to the second light channel assembly, the second light channel assembly is used for converting the monochromatic green light into second optical image light, and the first polarization spectroscope is used for combining the first optical image light and the second optical image light into composite image light. The display brightness of the projector is improved.

Description

Projector optical device and projector

Technical Field

The utility model relates to a projector field particularly, relates to a projector optical device and projector.

Background

A projector, also called a projector, is a device that can project images or videos onto a curtain, and can be connected with a computer, a VCD, a DVD, a BD, a game machine, a DV, etc. through different interfaces to play corresponding video signals. Projectors are widely applied to families, offices, schools and entertainment places, and have different types such as CRT, LCD, DLP, LCOS and the like according to different working modes.

However, the display brightness of the existing projector is not high, and the display effect is influenced.

SUMMERY OF THE UTILITY MODEL

The present invention provides an optical device for a projector and a projector, which can improve the display brightness of the projector to improve the display effect of the projector.

The embodiment of the utility model discloses a can realize like this:

in a first aspect, the present invention provides an optical device for a projector, comprising a first light source, a second light source, a green light source, a first light channel assembly, a second light channel assembly, and a first polarization beam splitter; one of the first light source and the second light source is a red light source generating monochromatic red light, and the other is a blue light source generating monochromatic blue light; the first light source and the second light source are both arranged on the light inlet side of the first light channel assembly to emit the monochromatic blue light or the monochromatic red light with image information to the first light channel assembly, and the first light channel assembly is used for converting the monochromatic red light or the monochromatic blue light into first optical image light corresponding to the monochromatic red light or the monochromatic blue light and projecting the first optical image light to the first polarization beam splitter; the green light source is arranged on the light inlet side of the second light channel assembly to emit monochromatic green light with image information to the second light channel assembly, and the second light channel assembly is used for converting the monochromatic green light into second optical image light corresponding to the monochromatic green light and projecting the second optical image light to the first polarizing beam splitter; the first polarizing beam splitter is used for combining the first optical image light and the second optical image light into a composite image light.

In an alternative embodiment, the first light channel assembly includes a second polarizing beam splitter and a first LCOS device, and the second light channel assembly includes a third polarizing beam splitter and a second LCOS device; the second polarization beam splitter is arranged in the light emitting direction of the first light source and the second light source, and the second polarization beam splitter is used for receiving the monochromatic red light and the monochromatic blue light, so that the monochromatic red light or the monochromatic blue light is projected to the first LCOS device, 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 to the first polarization beam splitter through the second polarization beam splitter; the third polarizing beam splitter is arranged in the light emitting direction of the green light source, and is used for receiving monochromatic green light emitted by the green light source and projecting the monochromatic green light to the second LCOS device, the second LCOS device is used for converting the monochromatic green light into second optical image light, and the second optical image is projected to the first polarizing beam splitter through the third polarizing beam splitter.

In an alternative embodiment, the projector optical apparatus further includes a controller 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 for controlling the first light source and the second light source to emit the monochromatic red light or the monochromatic blue light corresponding to the external input image information at intervals according to the external input image information; the controller is also used for controlling 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; 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 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.

In an alternative embodiment, the first light channel assembly comprises a dichroic mirror and the second light channel assembly comprises a first mirror; the dichroic mirror is arranged in the light emergence direction of the first light source and the second light source, and is used for receiving the monochromatic red light or the monochromatic blue light and projecting the monochromatic red light or the monochromatic blue light to the second polarization beam splitter; the first reflective mirror is arranged in the light emergent direction of the green light source so as to enable the monochromatic green light to be projected to the third polarizing beam splitter.

In an alternative embodiment, the first light channel assembly includes a second reflective 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 is projected onto the first polarization beam splitter through the dichroic mirror, and the second reflective mirror is arranged in the light exit direction of the first light source so that the light of the first light source is projected onto the second polarization beam splitter through the reflection of the second reflective mirror and the dichroic mirror.

In an alternative embodiment, the first optical channel assembly comprises a first spot adapter mirror and a first filter, and the second optical channel assembly comprises a second spot adapter mirror and a second filter; the first light spot adapting lens and the first filter lens are sequentially arranged between the dichroic mirror and the second polarizing beam splitter; the first light spot adapting mirror is arranged between the dichroic mirror and the first filter mirror, so that the monochromatic red light or the monochromatic blue light is matched with the first LCS device; the first filter mirror is arranged between the first light spot adapting mirror and the second polarizing beam splitter so as to enable one of the P-pole light or the S-pole light in the monochromatic red light or the monochromatic blue light to be transmitted and projected to the second polarizing beam splitter; the second light spot adaptive mirror is arranged between the green light source and the first reflective mirror so as to enable the monochromatic green light to be matched with the second LCOS device; the second filter mirror is arranged between the first reflective mirror and the third polarizing beam splitter so as to enable one of P-pole light or S-pole light in the monochromatic green light to penetrate and project to the third polarizing beam splitter.

In an alternative embodiment, the first light channel assembly comprises a third filter and the second light channel assembly comprises a fourth filter; the third filter mirror is arranged between the second polarizing beam splitter and the first polarizing beam splitter to filter the first optical image light; the fourth filter mirror is disposed between the third pbs and the first pbs to filter the second optical image light.

In an alternative embodiment, the projector optical arrangement comprises a field lens, which is arranged on the light exit side of the first polarizing beam splitter.

In an alternative embodiment, the projector optical device includes an imaging lens disposed on a light emitting side of the field lens, and the field lens is configured to project the composite image light to the imaging lens, so that the imaging lens projects an image on a display device.

In a second aspect, the present invention provides a projector including the projector optical device according to any one of the above embodiments.

The embodiment of the utility model provides a pair of projector optical device and projector's beneficial effect includes:

according to the polarization spectroscope, the first light source and the second light source are arranged on the light inlet side of the first light channel assembly, the first light channel assembly is used for converting monochromatic red light or monochromatic blue light emitted by the first light source or the second light source into first optical image light, and the first optical image light is projected to the first polarization spectroscope. And then the green light source is arranged at the light inlet side of the second light channel component, the second light channel component is utilized to convert the monochromatic green light into second optical image light, the second optical image light is projected to the first polarization spectroscope, and the first optical image light and the second optical image light are synthesized into composite image light by the first polarization spectroscope. Because the composite image light is formed by superposing and compounding the first optical image light and the second optical image light, the brightness of the composite light is higher, the display time of primary color green light, monochromatic red light and primary color blue can be prolonged in one display time period to ensure that the display effect is better, and the requirement on the refresh rate is also reduced. Meanwhile, because monochromatic green light has a large influence on the brightness of the projector, the green light source is arranged in the independent light channel, so that the green light source can be continuously lightened, the display time of primary color green light in the display time period is higher, the brightness of the projector is enhanced, and the display effect of the projector is better.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a projector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an optical device of a projector according to this embodiment;

FIG. 3 is a timing diagram illustrating the control of an optical device of a projector according to an embodiment;

fig. 4 is a logic block diagram of the controller provided in this embodiment.

Icon: 100-projector optics; 110-a first light source; 130-a second light source; 150-a green light source; 170-a first optical channel assembly; 171-a second polarizing beamsplitter; 173 — first LCOS device; 175-dichroic mirror; 177-a second mirror; 179 — first spot adapter mirror; 181-first filter; 183-third filter; 190-a second optical channel assembly; 191-a third polarizing beamsplitter; 193-a second LCOS device; 195-a first mirror; 197-a second spot fitting mirror; 199-second filter; 201-four filters; 210-a first polarizing beamsplitter; 230-a controller; 231-a decoding board; 232-logic master control unit; 233-modulation control area; 234-image channel selection area; 235-an internal test image storage area; 236-SDRAM area; 237-a first channel; 238-a second channel; 239-a 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-an imaging lens; 300-a projector; 310-a housing; 311-mounting holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

The applicant has found that the primary color green light has a great influence on the brightness display of the projector during the display process of the projector 300, and the display time of the primary color green light is higher than the brightness of the high image in the one-field image display time period.

Referring to fig. 1, the present embodiment provides a projector 300, which can improve the display brightness of the projector 300 to improve the display effect of the projector 300.

In this embodiment, the projector 300 includes a housing 310 and a projector optical device 100 disposed in the housing 310, wherein the projector optical device 100 is used for projecting an image on a display device (not shown).

As shown in fig. 2, in the present embodiment, the projector optical device 100 includes a first light source 110, a second light source 130, a green light source 150, a first light channel assembly 170, a second light 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 generating monochromatic red light, and the other is a blue light source generating monochromatic blue light. The first light source 110 and the second light source 130 are disposed on the light inlet side of the first light channel assembly 170 to emit monochromatic blue light or monochromatic red light with image information to the first light channel assembly 170, and the first light channel assembly 170 is configured to convert the monochromatic red light or monochromatic blue light into 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 disposed on the light inlet side of the second light channel assembly 190 to emit monochromatic green light with image information to the second light channel assembly 190, and the second light 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 polarizing beam splitter 210 is used to combine the first optical image light and the second optical image light into a composite image light.

As shown in fig. 3, in the present application, the first light source 110 and the second light source 130 are disposed on the light inlet side of the first light channel assembly 170, the first light channel assembly 170 is used to convert monochromatic red light or monochromatic blue light emitted by the first light source 110 or the second light source 130 into first optical image light, and the first optical image light is projected to the first polarization beam splitter 210. Then, by disposing the green light source 150 at the light inlet side of the second light channel assembly 190, the second light channel assembly 190 is used to convert the monochromatic green light into the second optical image light, and the second optical image light is projected to the first polarization beam splitter 210, and the first optical image light and the second optical image light are combined into the composite image light by the first polarization beam splitter 210. Because the composite image light is formed by superposing and compounding the first optical image light and the second optical image light, the brightness of the composite light is higher, the display time of primary color green light, monochromatic red light and primary color blue can be prolonged in one display time period to ensure that the display effect is better, and the requirement on the refresh rate is also reduced. Meanwhile, since monochromatic green light has a large influence on the brightness of the projector 300, the green light source 150 is arranged in a separate light channel so that the green light source 150 can be continuously turned on, and the display time of the primary color green light in the display time period is higher, so that the brightness of the projector is enhanced, and the display effect of the projector 300 is better.

It should be noted that, since the projection of the projector 300 is controlled according to the external input image information, after the first light source 110 or the second light source 130 generates the monochromatic red light or the monochromatic blue light according to the external input image information and enters the first light channel module 170, the first light channel module 170 is required to modulate the monochromatic red light or the monochromatic blue light according to the external image information and output the first optical image light with the image information after the brightness of the pixel is changed, and after the green light source 150 generates the monochromatic green light according to the external input image information and enters the second light channel module 190, the second light channel module 190 is required to modulate the monochromatic green light according to the external image information and output the second optical image light with the image information after the brightness of the pixel is changed. Since the first pbs 210 has the permeability of P-polar light and the emittance of S-polar 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 pbs 210, thereby realizing the composition of the first optical image and the second optical image.

As shown in fig. 2, in the present embodiment, the first light channel assembly 170 includes a second polarizing beam splitter 171 and a first LCOS device 173, and the second light channel assembly 190 includes a third polarizing beam splitter 191 and a second LCOS device 193. The second polarization beam splitter 171 is disposed in the light emitting direction of the first light source 110 and the second light source 130, the second polarization beam splitter 171 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 to the first LCOS device 173, the first LCOS device 173 converts the monochromatic red light or the monochromatic blue light into a first optical image light, and the first optical image light is projected to the first polarization beam splitter 210 through the second polarization beam splitter 171. The third pbs 191 is disposed in the light exiting direction of the green light source 150, the third pbs 191 is configured to receive the monochromatic green light emitted by the green light source 150 and project the monochromatic green light to the second LCOS device 193, the second LCOS device 193 is configured to convert the monochromatic green light into a second optical image light, and the second optical image is projected to the first pbs 210 through the third pbs 191.

Since the first and

second LCOS devices

173 and 193 are also referred to as liquid crystal on silicon. Each of the first and

second LCOS devices

173 and 193 includes a glass substrate, a liquid crystal layer, and a silicon layer in this order, a reflector is formed on the surface of the silicon layer, and monochromatic red light or monochromatic blue light emitted from the first or

second light source

110 or 130 is split into P-pole light and S-pole light perpendicular to each other when passing through the second polarization beam splitter 171. The P-pole light passes through the second pbs 171, and the S-pole light is reflected by the second pbs 171, so that only one of the decomposed P-pole light or S-pole light enters the first LCOS device 173.

In this embodiment, the P-pole light of monochromatic red light or monochromatic blue light passes through the second pbs 171 to enter the first LCOS device 173. The P-pole light (obtained by splitting a single red light or splitting a single blue light) incident from the front surface of the first LCOS device 173 passes through the liquid crystal layer to change the pixel brightness and rotate the polarization direction according to the externally input image information, thereby forming a first image light. The first image light is transmitted to the surface of the silicon based layer through the liquid crystal layer, and is reflected by the reflecting mirror of the silicon based layer to be emitted from the front surface of the first LCOS device 173. Since the polarization direction of the P-pole light entering from the front surface of the first LCOS device 173 is changed by the modulation of the liquid crystal layer, the first image light is S-pole light, and thus the first image light cannot pass through the second pbs 171 when being projected to the second pbs 171, so that the first image light is reflected by the second pbs 171 to the first pbs 210 and is reflected by the first pbs 210.

As shown in fig. 2, in the present embodiment, the monochromatic green light emitted from the green light source 150 is split into mutually perpendicular P-pole light and S-pole light when entering the third pbs 191, the P-pole light passes through the third pbs 191, and the S-pole light is reflected by the third pbs 191. In order to enable the first polarization beam splitter 210 to combine the first image light and the second image light to form a composite image light, in the present embodiment, the second LCOS device 193 is disposed in the emitting direction of the S-pole light.

In other embodiments of the present application, in order to enable the first polarization beam splitter 210 to combine the first image light and the second image light to form a composite image light, the S-pole light of monochromatic blue light or monochromatic red light may also enter the first LCOS device 173, and the P-pole light of monochromatic green light enters the second LCOS device 193, only the positions of the first LCOS device 173 and the second LCOS device 193 need to be adjusted according to the emitting 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.

As shown in fig. 2, in the present embodiment, the S-pole light of monochromatic green light incident through the front surface of the second LCOS device 193 forms the second image light after changing the pixel brightness and the polarization direction according to the external input image signal through the liquid crystal layer of the second LCOS device 193. The second image light is transmitted to the surface of the silicon based layer through the liquid crystal layer, and is reflected by the reflective mirror of the silicon based layer to be emitted from the front surface of the second LCOS device 193. The second image light emitted from the second LCOS device 193 is P-polar light, which passes through the third pbs 191 and is projected onto the first pbs 210 because the second light is modulated by the liquid crystal layer to change the polarization direction. The second image light projected on the first pbs 210 passes through the first pbs 210 and exits from the same side of the first pbs 210 along the same direction as the first image light, so that the first image light and the second image light are combined.

Referring to fig. 3 and 4, in the present 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 also 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 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 230 is also used to control the second LCOS device 193 to convert the monochromatic green light into a second optical image light corresponding to the external input image information according to the external input image information.

The controller 230 controls the first light source 110 and the second light source 130 to be lighted at intervals, and controls the green light source 150 and the first light source 110 or the second light source 130 so that the second light source 130 can be matched with the white balance adjustment of the image under the driving of each of the first light source 110 and the second light source 130. Meanwhile, the control can make the maximum lighting values of the first light source 110 and the second light source 130 close to 1/2 Vs cycles, and the maximum lighting value of the green light source 150 close to 1 Vs cycle, so that compared with the original maximum lighting values of 1/3 Vs cycles, the lighting values of the first light source 110, the second light source 130 and the green light source 150 are obviously improved, the requirement of refresh frequency is reduced, the burden of a control driving circuit is greatly lightened, and conditions are provided for widening other applications of corresponding driving ICs.

In the present embodiment, the controller 230 includes a decoding board 231, and the decoding board 231 is used to perform decoding processing on an input image for use by the controller 230. The input image can be stored in an external storage medium, such as a U disk, a hard disk, a CD, etc., or can be connected with electronic equipment, such as a computer, a mobile phone, etc. The decoding board 231 may be integrated with the controller 230, or may be externally connected to the controller 230.

Referring to fig. 4, the controller 230 includes a logic total control unit 232 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 general control unit 232 is connected with the decoding board 231 and the first light source 110, the second light source 130 and the green light source 150, respectively. The logic total control unit 232 is used for controlling the first light source 110 and the second light source 130 to illuminate and emit monochromatic blue light or monochromatic red light corresponding to the external input image information at intervals according to the external input image information transmitted by the decoding board 231. The green light source 150 is controlled to be simultaneously lit with the first light source 110 or the second light source 130. That is, the first light source 110 is simultaneously turned on with the green light source 150 and simultaneously turned off. The second light source 130 is simultaneously lit and simultaneously extinguished with the green light source 150. The modulation control section 233 includes an image channel selection section 234, an internal test image storage region 235, and an SDRAM region 236, and the image channel selection section 234 is connected to the decoding board 231, the internal test image storage region 235, and the SDRAM region 236, respectively. The image channel selection section 234 is used to select whether to cause the image input of the decoding board 231 or the image input of the internal test image storage region 235 to the SDRAM region 236. The internal test image storage area 235 stores image information for debugging. The SDRAM section 236 includes a first channel 237, a second channel 238, and a third channel 239, the first channel 237 and the second channel 238 all connected to the first LCOS device 173. The first channel 237 is used to store a full frame image of monochromatic red light and to deliver the stored full frame image to the first LCOS device 173 when the red light source is illuminated, so that the first LCOS device 173 brightens the pixel points according to the full frame image. The second channel 238 is for storing a full frame image of monochromatic blue light and for delivering the stored image to the first LCOS device 173 when the blue light source is illuminated, so that the first LCOS device 173 highlights the pixel points according to the full frame image. The second channel 238 is for storing a full frame image of monochromatic green light and for delivering the stored image to the second LCOS device 193 when the monochromatic green light is illuminated, so that the second LCOS device 193 highlights 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 select channel 240, a full-frame image storage area 241, and a read select channel 242, and the write select channel 240 is used for writing input image information into the full-frame image storage area 241. The full-frame image storage area 241 is used to store a full-frame image. The read select channel 242 is used to input the image of the full frame image storage area 241 to the first LCOS device 173 and the second and LOCS devices. Each full frame image storage region 241 includes a first full frame image storage region 243 and a second full frame image storage region 244. The write gate 240 is also used to write the input image information into the first full frame image storage area 243 or the second full frame image storage area 244 correspondingly. The read select channel 242 is also used to input the image of the first full frame image memory area 243 or the second full frame image memory area 244 to the first LCOS device 173 and the second LCOS device 193, respectively.

In some further embodiments of the present application, the controller 230 is configured to control the green light source 150 to continuously emit monochromatic green light corresponding to the externally input image information according to the externally input image information. That is, the first light source 110 and the second light source 130 are turned on the green light source 150 at intervals in the one-interval VS period by a constant amount.

In the present embodiment, the controller 230 is further configured to control the first light source 110 and the second light source 130 to emit monochromatic red light for first lighting and to emit monochromatic blue light for second lighting.

Referring to fig. 2, in the present embodiment, the first light channel assembly 170 includes a dichroic mirror 175, the dichroic mirror 175 is disposed in the light emitting direction of the first light source 110 and the second light source 130, and the dichroic mirror 175 is configured to receive monochromatic red light or monochromatic blue light and project the monochromatic red light or monochromatic blue light to the second polarization beam splitter 171.

The dichroic mirror 175 is also called a dichroic mirror. It features that it is almost completely transparent to light with certain wavelength and almost completely reflective to light with other wavelength. Accordingly, 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 of the first light source 110 and the light of the second light source 130 can be projected in the same direction after being processed, and thus both the light of the first light source 110 and the light of the second light source 130 can be projected to the second polarization beam splitter 171.

In the present embodiment, the second light tunnel assembly 190 includes a first reflective mirror 195. The first reflecting mirror 195 is disposed in the light exiting direction of the green light source 150 to project the monochromatic green light to the third pbs 191. The traveling direction of the monochromatic green light is changed by the second reflecting mirror 177 disposed to be projected on the third polarization beam splitter 191.

Referring to fig. 2, in the present embodiment, the first light source 110 and the second light source 130 are disposed in parallel, the first channel 237 component includes a second reflective mirror 177, and the dichroic mirror 175 is disposed corresponding to the second light source 130 so that the light of the second light source 130 is projected on the first pbs 210 through the dichroic mirror 175. The second reflective mirror 177 is disposed in the light exiting direction of the first light source 110, so that the light of the first light source 110 is reflected by the second reflective mirror 177 and the dichroic mirror 175 and projected onto the second pbs 171. Disposing the first light source 110, the second light source 130, and the third light source in parallel may avoid light contamination and facilitate the arrangement of the first light source 110, the second light source 130, and the green light source 150.

Referring to fig. 2, in the present embodiment, the first optical channel assembly 170 includes a first spot adapter 179 and a first filter 181. The first spot adapter lens 179 and the first filter 181 are sequentially disposed between the dichroic mirror 175 and the second polarization beam splitter 171. The first spot adapter 179 is disposed between the dichroic mirror 175 and the first filter 181 to shape the monochromatic red light or the monochromatic blue light with the first LCS device. The first light spot is disposed between the lens 179 and the second pbs 171, so that the P-polar light of the monochromatic red light and the monochromatic blue light is transmitted and projected to the second pbs 171. By arranging the first filter 181, S-pole light in monochromatic red light or monochromatic blue light can be filtered in advance, so that serious heating of the second polarization beam splitter 171 after two times of light processing is avoided, and the contrast of an image can be improved.

Referring to fig. 2, in the present embodiment, the second light path assembly 190 includes a second spot adapter 197 and a second filter 199. The second spot adapter mirror 197 is disposed between the green light source 150 and the first mirror 195 to shape the monochromatic green light into the second LCOS device 193. The second filter 199 is disposed between the first reflective mirror 195 and the third pbs 191, so as to transmit and project the S-pole light of the monochromatic green light to the third pbs 191. The second filter 199 can filter the P-pole light in the monochromatic green light in advance, thereby avoiding serious heating of the third polarization beam splitter 191 after two light treatments, and improving the contrast of the image.

Referring to fig. 2, in the present embodiment, the first channel 237 assembly includes a third filter 183. The third filter 183 is disposed between the second pbs 171 and the first pbs 210 to filter the first optical image light. By providing the third filter 183, the S-pole light in the first image optics can be filtered, thereby improving the contrast of the image display.

Referring to fig. 2, in the present embodiment, the second optical channel assembly 190 includes a fourth filter 201. The fourth filter 201 is disposed between the third pbs 191 and the first pbs 210 to filter the second optical image light. The third filter 183 is provided to filter the P-pole light in the first image optics, thereby improving the contrast of the image display.

In this embodiment, the first filter 181, the second filter 199, the third filter 183, and the fourth filter 201 are all polarizing glass plates, and the polarizing glass plates may be rotated according to the polarization directions of the filtered light rays to obtain S-pole light or P-pole light.

Referring to fig. 1 and fig. 2, in the present embodiment, the projector optical device 100 includes a field lens 250 and an imaging lens 270. The housing 310 is provided with a mounting hole 311. The field lens 250 and the imaging lens 270 are sequentially disposed on the light emitting side of the first pbs 210, and the imaging lens 270 is fixed in the mounting hole 311. The field lens 250 is used to project the composite image light to the imaging lens 270 so that the imaging lens 270 projects the image on the display device.

Embodiments of the present application also provide a method for controlling the projector optical device 100, which includes the following steps in one VS period:

the first light source 110 and the second light source 130 are controlled to be lighted at intervals. The green light source 150 is controlled to be simultaneously lit with the first light source 110 or the second light source 130.

In other embodiments of the present application, the control method of the projector optical device 100 may further include:

In the present embodiment, the method for controlling the first light source 110 and the second light source 130 to be lighted at intervals includes:

the first light source 110 and the second light source 130 are controlled to be turned on first for emitting monochromatic red light, and the first light source and the second light source for emitting monochromatic blue light are controlled to be turned on after the monochromatic red light is turned off.

The optical device 100, the control method and the projector 300 of the carmine projector provided by the embodiment have the following advantages:

by disposing the first light source 110 and the second light source 130 at the light entrance side of the first light path assembly 170, the monochromatic red light or the monochromatic blue light emitted from the first light source 110 or the second light source 130 is converted into the first optical image light by the first light path assembly 170, and the first optical image light is projected to the first polarization beam splitter 210. Then, by disposing the green light source 150 at the light inlet side of the second light channel assembly 190, the second light channel assembly 190 is used to convert the monochromatic green light into the second optical image light, and the second optical image light is projected to the first polarization beam splitter 210, and the first optical image light and the second optical image light are combined into the composite image light by the first polarization beam splitter 210. Because the composite image light is formed by superposing and compounding the first optical image light and the second optical image light, the brightness of the composite light is higher, the display time of primary color green light, monochromatic red light and primary color blue can be prolonged in one display time period to ensure that the display effect is better, and the requirement on the refresh rate is also reduced. Meanwhile, since monochromatic green light has a large influence on the brightness of the projector 300, the green light source 150 is arranged in a separate light channel so that the green light source 150 can be continuously turned on, and the display time of the primary color green light in the display time period is higher, so that the brightness of the projector is enhanced, and the display effect of the projector 300 is better.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An optical device of a projector is characterized by comprising a first light source, a second light source, a green light source, a first light channel component, a second light channel component and a first polarization spectroscope;

one of the first light source and the second light source is a red light source generating monochromatic red light, and the other is a blue light source generating monochromatic blue light;

the first light source and the second light source are both arranged on the light inlet side of the first light channel assembly to emit the monochromatic blue light or the monochromatic red light with image information to the first light channel assembly, and the first light channel assembly is used for converting the monochromatic red light or the monochromatic blue light into first optical image light corresponding to the monochromatic red light or the monochromatic blue light and projecting the first optical image light to the first polarization beam splitter;

the green light source is arranged on the light inlet side of the second light channel assembly to emit monochromatic green light with image information to the second light channel assembly, and the second light channel assembly is used for converting the monochromatic green light into second optical image light corresponding to the monochromatic green light and projecting the second optical image light to the first polarizing beam splitter;

the first polarizing beam splitter is used for combining the first optical image light and the second optical image light into a composite image light.

2. The projector optical apparatus of claim 1 wherein the first light channel assembly comprises a second polarizing beam splitter and a first LCOS device, and the second light channel assembly comprises a third polarizing beam splitter and a second LCOS device;

the second polarization beam splitter is arranged in the light emitting direction of the first light source and the second light source, and the second polarization beam splitter is used for receiving the monochromatic red light and the monochromatic blue light, so that the monochromatic red light or the monochromatic blue light is projected to the first LCOS device, 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 to the first polarization beam splitter through the second polarization beam splitter;

the third polarizing beam splitter is arranged in the light emitting direction of the green light source, and is used for receiving monochromatic green light emitted by the green light source and projecting the monochromatic green light to the second LCOS device, the second LCOS device is used for converting the monochromatic green light into second optical image light, and the second optical image is projected to the first polarizing beam splitter through the third polarizing beam splitter.

3. The projector optical apparatus as claimed in claim 2, further comprising a controller 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 for controlling the first light source and the second light source to emit the monochromatic red light or the monochromatic blue light corresponding to the external input image information at intervals according to the external input image information;

the controller is also used for controlling 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; 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 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.

4. The projector optical device of claim 2 or 3 wherein the first light channel assembly comprises a dichroic mirror and the second light channel assembly comprises a first mirror;

the dichroic mirror is arranged in the light emergence direction of the first light source and the second light source, and is used for receiving the monochromatic red light or the monochromatic blue light and projecting the monochromatic red light or the monochromatic blue light to the second polarization beam splitter;

the first reflective mirror is arranged in the light emergent direction of the green light source so as to enable the monochromatic green light to be projected to the third polarizing beam splitter.

5. The projector optical device as claimed in claim 4, wherein the first light path assembly includes a second reflective 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 from the second light source is projected onto the first polarization beam splitter through the dichroic mirror, and the second reflective mirror is arranged in the light emitting direction of the first light source so that the light from the first light source is projected onto the second polarization beam splitter by the reflection of the second reflective mirror and the dichroic mirror.

6. The projector optical device of claim 4 wherein the first optical channel assembly comprises a first spot adapter and a first filter and the second optical channel assembly comprises a second spot adapter and a second filter;

the first light spot adapting lens and the first filter lens are sequentially arranged between the dichroic mirror and the second polarizing beam splitter;

the first light spot adapting mirror is arranged between the dichroic mirror and the first filter mirror, so that the monochromatic red light or the monochromatic blue light is matched with the first LCOS device;

the first filter mirror is arranged between the first light spot adapting mirror and the second polarizing beam splitter so as to enable one of the P-pole light or the S-pole light in the monochromatic red light or the monochromatic blue light to be transmitted and projected to the second polarizing beam splitter;

the second light spot adaptive mirror is arranged between the green light source and the first reflective mirror so as to enable the monochromatic green light to be matched with the second LCOS device;

the second filter mirror is arranged between the first reflective mirror and the third polarizing beam splitter so as to enable one of P-pole light or S-pole light in the monochromatic green light to penetrate and project to the third polarizing beam splitter.

7. The projector optics of claim 4 wherein the first optical channel assembly comprises a third filter and the second optical channel assembly comprises a fourth filter;

the third filter mirror is arranged between the second polarizing beam splitter and the first polarizing beam splitter to filter the first optical image light;

the fourth filter mirror is disposed between the third pbs and the first pbs to filter the second optical image light.

8. The projector optical device as claimed in claim 1, wherein the projector optical device comprises a field lens disposed on a light exit side of the first pbs.

9. The projector optical device as claimed in claim 8, wherein the projector optical device comprises an imaging lens, the imaging lens is disposed on a light emitting side of the field lens, and the field lens is configured to project the composite image light to the imaging lens, so that the imaging lens projects an image on a display device.

10. A projector comprising the projector optics of any of claims 1-9.