CN215297927U - Projector optical device and projector - Google Patents

Abstract

An embodiment of the utility model provides a projector optical device and projector relates to the projector field. The first beam splitter of the projector optical device is used for receiving the light of the light source and splitting the light into a first light and a second light. The second spectroscope is arranged on the light emitting sides of the first LCD module and the second LCD module. The first LCD module is arranged between the first reflector and the first spectroscope and used for modulating the first light according to an external input signal so as to convert the first light into first image light. The first reflector is used for receiving the first image light so as to project the first image light to the second spectroscope. The second LCD module is arranged on a light path of the second light, and is used for modulating the second light according to an external input signal so as to convert the second light into second image light and projecting the second image light to the second spectroscope. The second spectroscope is used for combining the first image light and the second image light to form composite image light.

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 used in homes, offices, schools and entertainment places, and have different types such as CRT, LCD and DLP according to different working modes.

The existing LCD projector can only utilize a light source to generate P-pole light or S-pole light in light, so that the energy utilization rate is low, and the display brightness of the projector is not high.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is as follows:

provided is an optical device for a projector, which can improve the light energy utilization rate of a light source of the projector, thereby improving the display brightness of the projector.

Provided is a projector capable of improving the light energy utilization rate of a projector light source and improving the display brightness 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 beam splitter, a first LCD module, a first reflector, a second LCD module, and a second beam splitter; the first spectroscope is used for receiving light rays of a light source and decomposing the light rays into first light rays and second light rays which are perpendicular to each other; one of the first light ray and the second light ray is an S-pole light ray, and the other one of the first light ray and the second light ray is a P-pole light ray; the second spectroscope is arranged on the light emitting sides of the first LCD module and the second LCD module; the first LCD module and the first reflective mirror are arranged on a light path of the first light, the first LCD module is arranged between the first reflective mirror and the first beam splitter, the first LCD module is used for modulating the first light according to an external input signal so as to convert the first light into first image light with image information, and the first reflective mirror is used for receiving the first image light so as to project the first image light to the second beam splitter; the second LCD module is arranged on a light path of the second light, and is used for modulating the second light according to an external input signal so as to convert the second light into second image light with image information and project the second image light to the second spectroscope; the second spectroscope is used for compounding the first image light and the second image light so that the first image light and the second image light form a compound image light.

In an optional implementation manner, the projector optical device includes a second reflective mirror, the first LCD module and the second LCD module are arranged in parallel, the second reflective mirror is disposed on a light path where the second light ray is located, and the second reflective mirror is located on a light emitting side of the first beam splitter, so that the second light ray emitted by the first beam splitter is reflected to the second LCD module. In an alternative embodiment, the projector optical device includes a third reflective mirror, the first LCD module is disposed perpendicular to the second LCD module, and the third reflective mirror is disposed between the second LCD module and the second dichroic mirror, so that the second image light emitted from the second LCD module is reflected to the second dichroic mirror.

In an alternative embodiment, the projector optical device includes a first filter disposed on the light incident side of the first LCD module, and a second filter disposed on the light incident side of the second LCD module.

In an alternative embodiment, the first filter is spaced apart from the first LCD module and the second filter is spaced apart from the second LCD module.

In an alternative embodiment, the first filter and the second filter are both absorbing polarizers.

In an alternative embodiment, the projector optical device includes a light spot adapter disposed on a light-entering side of the first beam splitter for adjusting the light of the light source to fit the light with the first LCD module and the second LCD module.

In an alternative embodiment, the optical path length from the first light to the first LCD module is equal to the optical path length from the second light to the second LCD module, and the optical path length from the first image light to the second beam splitter is equal to the optical path length from the second image light to the second beam splitter.

In an alternative embodiment, the projector optics include a field lens; the field lens is arranged on the light inlet side of the first light splitter so that the light rays of the light source are matched with the first LCD module and the second LCD module; or, the number of the field lenses includes two, one of the two field lenses is arranged on the light inlet side of the first LCD module, and the other field lens is arranged on the light inlet side of the second LCD module.

In a second aspect, the present invention provides a projector, comprising a housing and any one of the above embodiments, wherein the projector optical device is mounted on the housing.

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

the light of the light source is decomposed into a first light and a second light which are perpendicular to each other by using the first spectroscope, and a first LCD module, a first reflective mirror and a second dichroic mirror are disposed on the optical path of the first light, so that the first light is input into the first LCD module to be modulated by the first LCD module according to an external input signal to convert the first light into first image light with image information, and then the first image light is reflected to the second spectroscope by the first reflector, a second LCD module is arranged on the light path of the second light, the second LCD module is used for modulating and converting the second light into second image light with image information according to an external input signal and projecting the second image light to a second spectroscope, so that the first image light and the second image light are emitted from one side of the second spectroscope to form a composite image light. Therefore, the utilization of P-pole light and S-pole light of the light source is realized, the utilization rate of light energy of the light source is improved, and the display brightness of the projector is improved.

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 an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another optical device of a projector according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another optical device of a projector according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an optical device of another projector according to an embodiment of the present invention.

Icon: 100-projector optics; 110-a first beam splitter; 130-a first LCD module; 140-a first mirror; 150-a second LCD module; 170-a second beam splitter; 190-a second mirror; 210-a third mirror; 230-a first filter; 250-a second filter; 270-spot adapter; 290-field lens; 310-a first heat sink; 330-a second heat sink; 350-an imaging lens; 370-a light source; 500-a projector; 510-a housing; 511-heat dissipation hole; 513-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.

Referring to fig. 1, the embodiment provides a projector 500, the projector 500 includes a housing 510 and a projector optical device 100, and the projector optical device 100 is installed in the housing 510.

Referring to fig. 2, in the present embodiment, the projector optical device 100 includes a light source 370, a first beam splitter 110, a first LCD module 130, a first reflective mirror 140, a second LCD module 150, and a second beam splitter 170. The first beam splitter 110 is disposed on the light emitting side of the light source 370 for receiving the light of the light source 370. Since the light has a particle dichroism, when the light of the light source 370 passes through the first beam splitter 110, a part of the light is reflected and a part of the light passes through the first beam splitter 110, so that the light of the light source 370 is split into a first light and a second light which are perpendicular to each other. The first LCD module 130 and the first reflective mirror 140 are disposed on a light path on which the first light is positioned. The second LCD module 150 is disposed on the light path of the second light. The second beam splitter 170 is disposed at the light emitting side of the first LCD module 130 and the second LCD module 150.

As shown in fig. 2, in the present embodiment, the first light ray is an S-pole light ray (indicated by a solid arrow) reflected by the first beam splitter 110, and the second light ray is a P-pole light ray (indicated by a dotted arrow) passing through the first beam splitter 110.

As shown in fig. 3, in some other embodiments of the present application, the first light ray may also be an S-pole light ray reflected by the first beam splitter 110, and the second light ray is a P-pole light ray passing through the first beam splitter 110.

In this embodiment, the first beam splitter 110 is a PBS prism, and in other embodiments of the present disclosure, the first beam splitter 110 may also be a polarization splitting film. It is to be understood that the present embodiment does not limit the type of the first beam splitter 110 as long as it can split the light of the light source 370 into the P-pole light and the S-pole light.

Referring to fig. 2, in the present embodiment, the first LCD module 130 is disposed between the first reflective mirror 140 and the first beam splitter 110. The first LCD module 130 is configured to modulate the first light according to an external input signal, so that the first light is converted into a first image light with image information. The first light vertically incident to the first LCD module 130 from the first beam splitter 110 is processed by the liquid crystal of the first LCD module 130 according to the external input information, so that the brightness of the pixel point of the first light is enhanced, and meanwhile, the first LCD module 130 has an optical rotation characteristic, so that the first light of the S pole can be converted into the first image light of the P pole with image information. The first image light enters the first reflective mirror 140 at an angle of 45 °, passes through the first reflective mirror 140 and projects onto the second dichroic mirror 170 at an angle of 45 °, and the first image light passes through the first dichroic mirror 110 as the P pole and exits the second dichroic mirror 170 from the opposite side.

In the present embodiment, the projector optical apparatus 100 includes a second reflective mirror 190, and the first LCD module 130 is disposed in parallel with the second LCD module 150. The second reflective mirror 190 is disposed on the light path where the second light ray is located, and the second reflective mirror 190 is located on the light emitting side of the second light ray of the first beam splitter 110. The second light passing through the first beam splitter 110 enters the second reflective mirror 190 at an angle of 45 °, and the second light is reflected again by the second reflective mirror 190 and projected to the second LCD module 150. The second LCD module 150 is configured to modulate the second light according to an external input signal, so that the second light is converted into a second image light with image information. The second light incident into the second LCD module 150 is processed by the liquid crystal of the second LCD module 150 according to the external input information, so that the brightness of the pixel point of the second light is enhanced, and meanwhile, the second LCD module 150 has an optical rotation characteristic, so that the second light of the P-pole can be converted into the second image light with image information of the S-pole. The second image light is projected from the light-emitting side of the second LCD module 150 to the second beam splitter 170, and since the second image light is S-pole light and cannot pass through the second beam splitter 170, the second image light reflected by the second beam splitter 170 is emitted from the same side of the second beam splitter 170 in the same direction as the first image light, so that the second beam splitter 170 combines the first image light and the second image light to form a composite image light. The utilization of the P-pole light and the S-pole light of the light source 370 is realized, and the utilization rate of the light energy of the light source 370 is increased, thereby improving the display brightness of the projector 500. Meanwhile, the first LCD module 130 and the second LCD module 150 are arranged in parallel, so that heat accumulation can be reduced, and heat dissipation of the first LCD module 130 and the second LCD module 150 can be better facilitated.

Referring to fig. 4 and 5, in some other embodiments of the present application, the projector optical apparatus 100 includes a third reflective mirror 210, and the first LCD module 130 is disposed perpendicular to the second LCD module 150. The third reflective mirror 210 is disposed between the second LCD module 150 and the second dichroic mirror 170, and the second light passing through the first dichroic mirror 110 is vertically incident into the light incident side of the second LCD module 150, because the second light incident into the second LCD module 150 is processed by the liquid crystal of the second LCD module 150 according to the external input information, the brightness of the pixel point of the second light is enhanced, and meanwhile, the second LCD module 150 has an optical rotation characteristic, so that the second light of the P pole can be converted into the second image light of the S pole with image information. The second image light emitted through the second LCD module 150 enters the third reflective mirror 210 at 45 °, and is reflected by the third reflective mirror 210 to the second dichroic mirror 170. Since the second image light is S-polar and is reflected by the second beam splitter 170, the second image light is emitted from the same side of the second beam splitter 170 in the same direction as the first image light, so that the second beam splitter 170 combines the first image light and the second image light to form a composite image light. Meanwhile, the first LCD module 130 and the second LCD module 150 are vertically disposed to make the structure of the projector optical device 100 smaller, and secondly, the first light and the second light enter the first LCD module 130 and the second LCD module 150 without being reflected, so that the first image light and the second image light enter the second beam splitter 170 by being reflected, and the light propagation path, the light energy loss and the effect are substantially the same, thereby making the contrast of the composite image better.

Referring to fig. 1, the present embodiment further includes a first heat dissipation device 310 and a second heat dissipation device 330, wherein the first heat dissipation device 310 is disposed on the housing 510 for dissipating heat of the first LCD module 130. The second heat sink 330 is disposed on the housing 510 for dissipating heat of the second LCD module 150. The housing 510 is formed with heat dissipating holes 511 corresponding to the first heat dissipating device 310 and the second heat dissipating device 330.

In the present embodiment, the first heat sink 310 and the second heat sink 330 are both heat dissipation fans.

In some other embodiments of the present application, the first heat dissipation device 310 may also be mounted to the first LCD module 130. The second heat sink 330 may also be mounted to the second LCD module 150.

In this embodiment, the optical path length of the first light to the first LCD module 130 is equal to the optical path length of the second light to the second LCD module 150, and the optical path length of the first image light to the second beam splitter 170 is equal to the optical path length of the second image light to the second beam splitter 170. Equal light paths may allow for better contrast of the displayed image.

Referring to fig. 2, fig. 3, fig. 4 and fig. 5, in the present embodiment, the projector optical device 100 includes a first filter 230 and a second filter 250. The first filter 230 is disposed on the light input side of the first LCD module 130, and the second filter 250 is disposed on the light input side of the second LCD module 150. The S-pole light not completely separated from the first light may be filtered by the first filter 230. The P-pole light not completely separated in the second light may be filtered by providing the second filter 250.

In the present embodiment, the first filter 230 is spaced apart from the first LCD module 130, and the second filter 250 is spaced apart from the second LCD module 150. Since the first filter 230 may cause the first filter 230 to generate heat when filtering the first light, the first filter 230 is spaced apart from the first LCD module 130 to prevent the heat on the first filter 230 from being transferred to the first LCD module 130. Since the second filter 250 may generate heat when the second filter 250 filters the first light, the second filter 250 is spaced apart from the second LCD module 150 to prevent heat on the second filter 250 from being transferred to the second LCD module 150.

In the present embodiment, the first filter 230 and the second filter 250 are both absorbing polarizing glass slides. The angle of the absorption type polarizer glass sheet can be set to allow the absorption type polarizer glass sheet to pass P-polar light or S-polar light when in use. The absorption type polarizing glass sheet is used, so that the polarizing glass sheet can absorb the unwanted light, and the phenomenon that light pollution is caused by reflection to influence the display effect is avoided.

In the present embodiment, the projector optical device 100 includes an optical spot adapter 270, and the optical spot adapter 270 is disposed between the light source 370 and the first beam splitter 110, and is used for adjusting the light of the light source 370, so that the light size of the light source 370 is adapted to the first LCD module 130 and the second LCD module 150.

In this embodiment, the spot adapter 270 is an aspherical mirror. It has better light guiding effect, and can make the light of the light source 370 become parallel light to be better incident into the first LCD module 130 and the second LCD module 150.

In other embodiments of the present application, the spot adapter 270 may also be a light guide element such as a light guide pillar.

Referring to fig. 4 and 5, in the present embodiment, the projector optical device 100 includes a field lens 290. The number of the field lens 290 includes one, and the field lens 290 is disposed at the light incident side of the first beam splitter 110 to match the light of the light source 370 with the first LCD module 130 and the second LCD module 150. The light of the light source 370 may be shaped into quasi-parallel light adapted to the geometrical dimensions of the first LCD module 130 and the second LCD module 150 by providing a mirror. Facilitating more light from the light source 370 to enter the first LCD module 130 and the second LCD module 150.

Referring to fig. 1 and 2, in other embodiments of the present disclosure, especially when the first light ray and the second light ray have poor parallelism, the number of the field lenses 290 includes two, one of the two field lenses 290 is disposed on the light incident side of the first LCD module 130, and the other is disposed on the light incident side of the second LCD module 150. The field lens 290 is disposed in the light incident on the first LCD module 130 and the second LCD module 150 to make the light incident on the first LCD module 130 and the second LCD module 150 quasi-parallel.

Referring to fig. 2, fig. 3, fig. 4 and fig. 5, in the present embodiment, the projector optical device 100 includes an imaging lens 350, a mounting hole 513 is disposed on the housing 510, and the imaging lens 350 is mounted in the mounting hole 513, and corresponds to the light emitting side of the second beam splitter 170, and is used for projecting the composite image light onto the display device.

In this embodiment, the light emitting sides of the first LCD module 130 and the second LCD module 150 are also provided with field lenses 290, respectively. The field lens 290 is disposed on the light-emitting side of the first LCD module 130 and the light-emitting side of the second LCD module 150, so that the composite light entering the imaging lens 350 can be better converted into quasi-parallel light, and more composite light can enter the imaging lens 350. Meanwhile, the length of the imaging lens 350 can also be shortened.

The beneficial effects and the working principle of the projector optical device 100 and the projector 500 provided by the embodiment include:

in the embodiment, the light of the light source 370 is split into the first light and the second light perpendicular to each other by the first beam splitter 110, and the first LCD module 130, the first reflective mirror 140, and the second beam splitter 170 are disposed on the optical path of the first light, such that the first light is inputted into the first LCD module 130, the first LCD module 130 modulates the first light according to an external input signal to convert the first light into the first image light with image information, the first reflective mirror 140 reflects the first image light to the second beam splitter 170, the second LCD module 150 is disposed on the optical path of the second light, the second LCD module 150 modulates the second light according to an external input signal and converts the second light into the second image light with image information, and the second image light is projected to the second beam splitter 170, such that the first image light and the second image light are emitted from one side of the second beam splitter 170 to form a composite image of the first image light and the second image light Like light rays. Therefore, the utilization of the P-pole light and the S-pole light of the light source 370 is realized, the utilization rate of the light energy of the light source 370 is increased, and the display brightness of the projector 500 is improved.

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 (10)

1. An optical device of a projector is characterized by comprising a first spectroscope, a first LCD module, a first reflector, a second LCD module and a second spectroscope;

the first spectroscope is used for receiving light rays of a light source and decomposing the light rays into first light rays and second light rays which are perpendicular to each other; one of the first light ray and the second light ray is an S-pole light ray, and the other one of the first light ray and the second light ray is a P-pole light ray;

the second spectroscope is arranged on the light emitting sides of the first LCD module and the second LCD module;

the first LCD module and the first reflector are arranged on a light path where the first light is located, the first LCD module is arranged between the first reflector and the first spectroscope, the first LCD module is used for modulating the first light according to an external input signal so as to convert the first light into first image light with image information, and the first reflector is used for receiving the first image light so as to project the first image light to the second spectroscope;

the second LCD module is arranged on a light path where the second light is located, and is used for modulating the second light according to an external input signal so as to convert the second light into second image light with image information and project the second image light to the second spectroscope;

the second spectroscope is used for compounding the first image light and the second image light so that the first image light and the second image light form a compound image light.

2. The optical device of claim 1, wherein the optical device comprises a second reflective mirror, the first LCD module is disposed in parallel with the second LCD module, the second reflective mirror is disposed on an optical path of the second light, and the second reflective mirror is disposed on a light-emitting side of the first beam splitter, so that the second light emitted from the first beam splitter is reflected to the second LCD module.

3. The projector optics apparatus of claim 1 wherein the projector optics apparatus includes a third reflective mirror, the first LCD module is disposed perpendicular to the second LCD module, and the third reflective mirror is disposed between the second LCD module and the second dichroic mirror to reflect the second image light emitted by the second LCD module to the second dichroic mirror.

4. The projector optical device as claimed in any of claims 1 to 3, wherein the projector optical device comprises a first filter and a second filter, the first filter being disposed on the light incoming side of the first LCD module, and the second filter being disposed on the light incoming side of the second LCD module.

5. The projector optics of claim 4 wherein the first filter is spaced from the first LCD module and the second filter is spaced from the second LCD module.

6. The projector optics of claim 5 wherein the first filter and the second filter are both absorbing polarizers.

7. The projector optical device as claimed in any one of claims 1 to 3, wherein the projector optical device comprises a flare adapter disposed on a light entrance side of the first beam splitter for adjusting the light of the light source to fit the light with the first LCD module and the second LCD module.

8. The projector optical device as claimed in any of claims 1-3, wherein the optical path length of the first light to the first LCD module is equal to the optical path length of the second light to the second LCD module, and the optical path length of the first image light to the second beam splitter is equal to the optical path length of the second image light to the second beam splitter.

9. The projector optics as claimed in any one of claims 1 to 3 wherein the projector optics comprises a field lens;

the field lens is arranged on the light inlet side of the first light splitter so that the light rays of the light source are matched with the first LCD module and the second LCD module; alternatively, the first and second electrodes may be,

the number of the field lenses comprises two, one of the two field lenses is arranged on the light inlet side of the first LCD module, and the other field lens is arranged on the light inlet side of the second LCD module.

10. A projector is characterized by comprising a shell;

and the projector optics of any of claims 1-9 mounted to the housing.

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