TWI661259B - Projection system - Google Patents

Abstract

The invention discloses a projection system, which comprises a light source module, a first mirror group, an area dimming display, a second mirror group, an imaging display and a projection lens. The first mirror group, the area dimming display, the second mirror group, the imaging display, and the projection lens are disposed on a predetermined optical path. A light generated by the light source module passes through the first lens group, the area dimming display, the second lens group, the imaging display, and the projection lens to form an image light source. The light generated by the light source module is adjusted by the area dimming display to adjust the light flux of the light. A control region of the area dimming display corresponds to at least one pixel region of the imaging display.

Description

Projection system

The invention relates to a projection system, in particular to a projection system capable of improving image contrast.

First, with the advent of the information age, coupled with the development of optical technology and projection display technology, digital projectors capable of outputting high resolution and large screens have become corporate presentations, conference events, education and training, and even home entertainment. Is an indispensable part in providing visual images. Therefore, the projector's high image quality, high brightness, and compact size have become important indicators for consumers in purchasing.

However, in the prior art, in order to adjust the contrast ratio of an image, the existing projection systems are mostly dynamic contrast technologies, that is, dynamic global dimming is used for adjustment. However, the dynamic global dimming mechanism is to dim or brighten the image as a whole. Therefore, the visual effect of the image is poor.

The technical problem to be solved by the present invention is to provide a projection system capable of improving the natural contrast of an image, that is, a technology capable of improving the contrast without the need for dynamic time division in response to the deficiency of the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a projection system including a light source module, a first mirror group, an area dimming display, a second mirror group, a Imaging display and a projection lens. The light source module can generate a light beam along a predetermined optical path. The first mirror group is disposed adjacent to one side of the light source module, and the first mirror group is located On the predetermined optical path. The area dimming display is disposed adjacent to one side of the light source module, and the area dimming display is located on the predetermined optical path. The second mirror group is disposed adjacent to one side of the light source module, and the second mirror group is located on the predetermined optical path. The imaging display is disposed adjacent to one side of the light source module, and the imaging display is located on the predetermined optical path. The projection lens is disposed adjacent to one side of the light source module, and the projection lens is located on the predetermined optical path. The light can pass through the first lens group, the area dimming display, the second lens group, the imaging display, and the projection lens. The light passes through the imaging display and the projection lens to form an image light source imaged on a screen.

Another technical solution adopted by the present invention is to provide a projection system, which includes a light source module, a first mirror group, an area dimming display, a second mirror group, an imaging display, and a projection lens. The first lens group, the area dimming display, the second lens group, the imaging display, and the projection lens are disposed on a predetermined optical path. Wherein, a light generated by the light source module passes through the first lens group, the area dimming display, the second lens group, the imaging display, and the projection lens to form an image light source. . The light generated by the light source module is controlled by the area dimming display to adjust the light flux of the light. A control region of the area dimming display corresponds to at least one pixel region of the imaging display.

One of the beneficial effects of the present invention is that the projection system provided by the embodiment of the present invention can use "the light can pass through the first lens group, the area dimming display, the second lens group, The imaging display and the projection lens can improve the contrast of an image.

In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and explanation, and are not intended to limit the present invention.

U‧‧‧ Projection System

1‧‧‧light source module

11‧‧‧First light source unit

12‧‧‧Second light source unit

13‧‧‧Third light source unit

2‧‧‧The first mirror group

3‧‧‧Regional dimming display

4‧‧‧Second Mirror Group

5‧‧‧ Imaging Display

51‧‧‧The first imaging display unit

52‧‧‧Second imaging display unit

53‧‧‧Third imaging display unit

6‧‧‧ projection lens

7‧‧‧ screen

8‧‧‧Control Module

L‧‧‧light

L1‧‧‧First Light

L2‧‧‧Second Light

L3‧‧‧ third light

P1‧‧‧First Projected Light

P2‧‧‧second projection light

P3‧‧‧ third projection light

P11 ~ Pij‧‧‧Regulation area

M11 ~ Mij‧‧‧Pixel area

FIG. 1 is a schematic diagram of an optical path of a projection system according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a correspondence between an area dimming display and an imaging display according to an embodiment of the present invention.

FIG. 3 is another schematic diagram of an area dimming display and an imaging display according to an embodiment of the present invention.

FIG. 4 is a functional block diagram of a projection system according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of an optical path of a projection system according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram of an optical path of a projection system according to a third embodiment of the present invention.

FIG. 7 is a schematic diagram of an optical path of a projection system according to a fourth embodiment of the present invention.

FIG. 8 is a schematic diagram of an optical path of a projection system according to a fifth embodiment of the present invention.

The following is a description of specific embodiments of the "projection system" disclosed by the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention may be implemented or applied through other different specific embodiments, and various details in this specification may also be based on different viewpoints and applications, and various modifications and changes may be made without departing from the spirit of the present invention. In addition, the drawings of the present invention are merely a schematic illustration, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various elements or signals, etc., these elements or signals should not be limited by these terms. These terms are used to distinguish one element from another, or a signal from another signal. In addition, as used herein, the term "or" may include all combinations of any one or more of the associated listed items, as the case may be.

[First embodiment]

First, please refer to FIG. 1, which is a projection system according to a first embodiment of the present invention. Schematic diagram of the optical path of the system. The invention provides a projection system U, which includes a light source module 1, a first mirror group 2, an area dimming display 3 (area dimming display panel), a second mirror group 4, and an imaging display 5. And a projection lens 6. The light source module 1 can generate a light L along a predetermined optical path. For example, the light source module 1 can be an ultra-high pressure mercury lamp such as Ultra-High Efficiency (UHE) or Ultra-High Performance (UHP), and then Alternatively, it may be a light-emitting diode (LED) or laser, etc. In addition, in other embodiments, the light source module 1 may also be composed of three light source units (see FIG. 7 and FIG. As shown in FIG. 8, the first light source unit 11, the second light source unit 12, and the third light source unit 13) are composed, and the three light source units can generate red light (generated by the first light source unit 11) and green light (by the first Two light source units 12) and blue light (generated by the third light source unit 13). It should be noted that FIG. 1 in the first embodiment uses a brief schematic diagram as an explanation of the main concept of this case, and specific implementation manners will be further described in subsequent embodiments.

Continuing from the foregoing, in the first embodiment, the first mirror group 2 may be disposed adjacent to one side of the light source module 1, and the first mirror group 2 is located on a predetermined optical path. Then, the area dimming display 3 may be disposed adjacent to one side of the light source module 1, and the area dimming display 3 is located on a predetermined optical path. In addition, the second mirror group 4 may be disposed adjacent to one side of the light source module 1, and the second mirror group 4 is located on a predetermined optical path. Moreover, the imaging display 5 (Imaging Micro Display) may be disposed adjacent to one side of the light source module 1, and the imaging display 5 is located on a predetermined optical path. Further, the projection lens 6 may be disposed adjacent to one side of the light source module 1, and the projection lens 6 is located on a predetermined optical path. According to the embodiment of the present invention, the area dimming display 3 may be disposed between the first mirror group 2 and the second mirror group 4, and the imaging display 5 may be disposed between the second mirror group 4 and the projection lens 6. Therefore, the light L generated by the light source module 1 can pass through the first lens group 2, the area dimming display 3, the second lens group 4, the imaging display 5, and the projection lens 6. That is, the light L can pass through the area dimming display 3 and the imaging display 5 in this order. Further, after the light L passes through the imaging display 5 and the projection lens 6, an image can be formed on a screen 7 (screen The screen 7 may be an image light source (not shown in the figure) on a wall or a projection screen). In addition, it should be noted that the specific architectures of the first mirror group 2, the second mirror group 4, the imaging display 5, and the projection lens 6 in the projection system U are techniques well known to those skilled in the art, and are not repeated here.

According to the above, it must be particularly noted that the light L passing through (or passing through) the first lens group 2 is projected on the area dimming display 3 in an imaging manner, that is, the area dimming display 3 The light L is an imaged light type. For example, the area dimming display 3 may be a transmissive panel, but the present invention is not limited thereto. In other embodiments, the area dimming display 3 may also be A reflective LCoS (Liquid Crystal on Silicon) panel or digital light processing (DLP) panel is used, but at this time, it needs to be matched with, for example, polarized light or Total Internal Reflection Prism, TIR Prism). In addition, after the light L passes through the imaging display 5 and the projection lens 6, it can be imaged on the screen 7. That is, the area dimming display 3 may be provided on a first imaging area of a light source, and the imaging display 5 may be provided on a second imaging area of a light source. Thereby, the area dimming display 3 can be used as a light valve. In addition, it is worth noting that, in the first embodiment, the imaging display 5 may be an LCoS (Liquid Crystal on Silicon) display. However, in other embodiments, the first lens group 2 may be changed. And the structure of the second lens group 4, so that the imaging display 5 is an LCD (Liquid Crystal Display) or DLP (Digital Light Processing), which is not limited in the present invention. In other words, the imaging display 5 may be an LCoS panel, a DLP panel, or an LCD panel.

Next, please refer to FIG. 2. FIG. 2 is a schematic diagram of a correspondence between an area dimming display and an imaging display according to an embodiment of the present invention. The following describes the corresponding relationship between the area dimming display 3 and the imaging display 5. In detail, the area dimming display 3 may have multiple adjustment regions (P11 ~ Pij), the imaging display 5 may have multiple pixel regions (M11 ~ Mij), and the multiple adjustment regions Pij of the area dimming display 3 may have Each of the plurality of pixel regions Mij corresponds to the imaging display 5. For example That is, the resolution of the area dimming display 3 may be less than or equal to the resolution of the imaging display 5. Preferably, the resolution of the area dimming display 3 may be smaller than the resolution of the imaging display 5 to achieve the effect of reducing costs.

Further, referring to FIG. 2 again, in the embodiment of FIG. 2, the resolution of the area dimming display 3 may be equal to the resolution of the imaging display 5. At the same time, the plurality of control regions Pij of the area dimming display 3 may be a grid-like area, and each grid area may be controlled by a driving chip (not shown) of the area dimming display 3 so that Each regulatory region Pij can be selectively turned on or off. Thereby, the light flux of the light L passing through the area dimming display 3 is adjusted. That is, the light L generated by the light source module 1 is adjusted by the area dimming display 3 to adjust the light flux of the light L. In other words, the setting of the area dimming type display 3 can make the projection system U provided by the embodiment of the present invention have the effect of local dimming control. Thereby, the contrast of the image light source imaged on the screen 7 can be further improved. Therefore, according to the embodiment of the present invention, the area dimming display 3 can have the effect of pixel level dimming (PLD), that is, the area dimming display 3 can be a pixel level dimming display. (Pixel Level Dimming Micro Display). In other words, assuming that the area dimming display 3 is two million pixels, that is, there can be two million control regions Pij, and the light L passing through the control regions Pij can be controlled separately.

Following the above, please refer to FIG. 3. FIG. 3 is another schematic diagram of an area dimming display and an imaging display according to an embodiment of the present invention. In the embodiment of FIG. 3, the resolution of the area dimming display 3 is shown. It can be smaller than the resolution of the imaging display 5, that is, the area dimming display 3 has a plurality of control regions Pij, the imaging display 5 has a plurality of pixel regions Mij, and each control region Pij of the area dimming display 3 corresponds to At least two pixel regions Mij for the imaging display 5. That is, one of the control regions Pij of the area dimming display 3 corresponds to at least one of the pixel regions Mij of the imaging display 5. Therefore, it can be seen from the comparison between FIG. 3 and FIG. 2 that in the embodiment of FIG. 3, one of the control regions Pij of the area dimming display 3 It may correspond to the four pixel regions Mij of the imaging display 5. However, in other embodiments, one of the control regions Pij of the area dimming display 3 may also correspond to the four or more pixel regions Mij of the imaging display 5 or It is two to four pixel regions Mij, which is not limited in the present invention. That is, each of the control regions Pij of the area dimming display 3 may correspond to one or more pixel regions Mij of the imaging display 5, respectively.

Next, please refer to FIG. 4. FIG. 4 is a functional block diagram of the projection system according to the embodiment of the present invention. In the embodiment of the present invention, the projection system U may further include a control module 8. It is connected to the area dimming display 3 and the imaging display 5. In addition, the area dimming display 3 can be controlled by the control module 8 to adjust the luminous flux of the light L passing through the area dimming display 3. For example, the control module 8 may include a video processing unit (VPU, not shown in the figure) and a plurality of control regions Pij for selectively controlling opening of the area dimming display 3. Or a closed Pixel Dimming Processing Unit (not shown in the figure). In addition, the area dimming display 3 may include an area dimming display driving chip (not shown), and the imaging display 5 may include an imaging display driving chip (not shown), and the control mode The group 8 can be electrically connected to the area dimming display driving chip and the imaging display driving chip, and then control the area dimming display 3 according to a signal. In other words, a light L generated by the light source module 1 can pass through the area dimming display 3, and a control module 8 can be used to adjust the light flux of the light L, and a control region Pij of the area dimming display 3 It can correspond to at least one pixel region Mij of the imaging display 5. Further, the control module 8 can determine which regions need to be adjusted for brightness according to the received signal, thereby improving the contrast of the image.

Following the above, please refer to FIG. 2 and FIG. 4 again. The method of the control module 8 for controlling the plurality of control regions Pij of the area dimming display 3 will be further exemplified below. For example, the area dimming display 3 and the imaging display 5 can be a light combining module composed of a three-piece R (red), G (green), and B (blue) display panel, and each color has 8-bit gray scale display. Therefore, the state of the regulatory region Pij can satisfy the following relationship: Pij = W _R * Rij + W _G * Gij + W _B * Bij, where W _R , W _G and W _B represent three The weight value of each color, where W _R + W _G + W _B = 1, for example: W _R = W _G = W _B = 1/3, or other optimized ratio value combination, and Rij, Gij and Bij are Grayscale values for three colors. Therefore, if it is assumed that the contrast of the area dimming display 3 is 1000: 1 and the contrast of the imaging display 5 is 1000: 1, the contrast of each pixel of the projection system U can be individually adjusted to reach (1000) ² : 1. However, it should be noted that the present invention is not limited to the control methods exemplified above.

[Second embodiment]

First, please refer to FIG. 5, which is a schematic diagram of an optical path of a projection system according to a second embodiment of the present invention. In the second embodiment, the projection system U may include a light source module 1 (for example, the light source module 1 may be a UHP), a first mirror group 2, an area dimming display 3, and a second Mirror group 4, an imaging display 5, and a projection lens 6. In addition, the first lens group 2, the area dimming display 3, the second lens group 4, the imaging display 5, and the projection lens 6 are disposed on a predetermined optical path. Meanwhile, the area dimming display 3 may be located between the imaging display 5 and the light source module 1. It should be particularly noted that the relationship between the area dimming display 3 and the imaging display 5 is similar to the previous embodiment, and is not repeated here, that is, the area dimming display 3 can be controlled by the control module 8 Control to adjust the luminous flux of the light L passing through the area dimming display 3.

Next, please refer to FIG. 5 again. In the second embodiment, the projection system U provided in the second embodiment may be a projection structure of a three-chip LCD. The imaging display 5 may include a first imaging display unit 51, a second imaging display unit 52, and a third imaging display unit 53. In addition, the first imaging display unit 51, the second imaging display unit 52, and the third imaging display unit 53 can be used as displays for imaging red, green, and blue. Further, in the second embodiment, the light source module 1 generates After the light L passes through the first lens group 2, the area dimming display 3, and the second lens group 4, a first projection light P1 projected onto the first imaging display unit 51 can be formed, and a second projection display can be projected onto the second imaging display. The second projection light P2 on the unit 52 and a third projection light P3 on the third imaging display unit 53. Then, the first projection light P1, the second projection light P2, and the third projection light P3 can be combined by a light combining unit (not labeled in the figure), and then projected into the projection lens 6 to form an image. Image light source on a screen 7.

Following the above, for example, the first lens group 2 may include at least one polarization converter (PS-Converter, not labeled in the figure) and a lens group (not labeled in the figure). Meanwhile, the second mirror group 4 may include at least one dichroic mirror (not labeled in the figure), a reflector (not labeled in the figure), and a lens group (not labeled in the figure). It should be noted that the optical elements of the first lens group 2 (such as a polarizing converter and a lens group) and the optical elements of the second lens group 4 (such as a dichroic plate, a mirror, and a lens group) belong to the technical field. The techniques familiar to the personnel are not repeated here.

[Third embodiment]

First, please refer to FIG. 6, which is a schematic diagram of an optical path of a projection system according to a third embodiment of the present invention. It can be seen from the comparison between FIG. 6 and FIG. 5 that the biggest difference between the third embodiment and the second embodiment is that the second lens group 4 and the imaging display 5 provided by the third embodiment may be different from the foregoing second embodiment. In the third embodiment, the imaging display 5 may be an LCoS display. In addition, the imaging display 5 may include a first imaging display unit 51, a second imaging display unit 52, and a third imaging display unit 53. In addition, the first imaging display unit 51, the second imaging display unit 52, and the third imaging display unit 53 can be used as displays for imaging red, green, and blue.

Further, in the third embodiment, the light L generated by the light source module 1 (for example, the light source module 1 may be UHP) passes through the first lens group 2, the area dimming display 3, and the second After the lens group 4, a first projection light P1 projected onto the first imaging display unit 51 can be formed, and a second projection projected onto the second imaging display unit 52 can be formed. The light P2 and a third projection light P3 projected onto the third imaging display unit 53. Then, the first imaging display unit 51, the second imaging display unit 52, and the third imaging display unit 53 are projected onto a light combining unit (not labeled in the figure) for light combining. Finally, it is projected into the projection lens 6 to form an image light source imaged on a screen 7.

In addition, it should be noted that the structural features of the light source module 1, the first mirror group 2, the area dimming display 3, the second mirror group 4, the imaging display 5, and the projection lens 6 in the projection system U are similar to the foregoing embodiments. Similarly, the description is not repeated here, that is, the area dimming display 3 can be controlled by the control module 8 to adjust the luminous flux of the light L passing through the area dimming display 3. Furthermore, the optical elements of the first mirror group 2 and the optical elements of the second mirror group 4 are techniques well known to those skilled in the art, and will not be repeated here.

[Fourth embodiment]

First, please refer to FIG. 7, which is a schematic diagram of an optical path of a projection system according to a fourth embodiment of the present invention. In the fourth embodiment, the projection system U may include a light source module 1 (for example, the light source module 1 may be an LED or a laser), a first lens group 2, a zone dimming display 3, a The second lens group 4, an imaging display 5 and a projection lens 6. In addition, the first lens group 2, the area dimming display 3, the second lens group 4, the imaging display 5, and the projection lens 6 are disposed on a predetermined optical path. Meanwhile, the area dimming display 3 may be located between the imaging display 5 and the light source module 1. It should be particularly noted that the relationship between the area dimming display 3 and the imaging display 5 is similar to the previous embodiment, and is not repeated here, that is, the area dimming display 3 can be controlled by the control module 8 Control to adjust the luminous flux of the light L passing through the area dimming display 3.

Continuing the above, in the fourth embodiment, the light source module 1 may include a first light source unit 11, a second light source unit 12, and a third light source unit 13, and the light L can be transmitted by the first light source unit 11, the first Two light source units 12 and third light source units 13 The first light L1, the second light L2, and the third light L3 are respectively generated, and the first light L1, the second light L2, and the third light L3 can generate red, green, and blue light, respectively. At the same time, the first light L1, the second light L2, and the third light L3 can pass through the combined light of the first lens group 2 and pass through the first lens group 2, the area dimming display 3, and the second lens group 4 to On the imaging display 5. For example, the imaging display 5 provided in the fourth embodiment may be an LCoS display, but the present invention is not limited thereto. Furthermore, the optical elements of the first mirror group 2 and the optical elements of the second mirror group 4 are techniques well known to those skilled in the art, and will not be repeated here.

[Fifth embodiment]

First, please refer to FIG. 8, which is a schematic diagram of an optical path of a projection system according to a fifth embodiment of the present invention. It can be seen from the comparison between FIG. 8 and FIG. 7 that the biggest difference between the fifth embodiment and the fourth embodiment is that the first mirror group 2, the second mirror group 4, and the imaging display 5 provided in the fifth embodiment may be different from the foregoing. Fourth embodiment. Further, the architecture of the projection system U provided in the fifth embodiment may be a one-piece Digital Light Processing (DLP) architecture. Therefore, the imaging display 5 in the fifth embodiment may be a digital micromirror device (DMD). Thereby, the first light L1, the second light L2, and the third light L3 can be projected onto the imaging display 5 through the first lens group 2, the area dimming display 3, and the second lens group 4. In addition, it should be noted that, in other embodiments, the imaging display 5 may also have a one-chip architecture or a multi-chip architecture.

It should be particularly noted that the relationship between the area dimming display 3 and the imaging display 5 is similar to the previous embodiment, and is not repeated here, that is, the area dimming display 3 can be controlled by the control module 8 Control to adjust the luminous flux of the light L passing through the area dimming display 3. In addition, it should be noted that the optical elements of the first lens group 2 and the optical elements of the second lens group 4 are techniques well known to those skilled in the art, and will not be repeated here.

[Advantageous Effects of the Embodiment]

One of the beneficial effects of the present invention may be that the projection system U provided by the embodiment of the present invention can utilize "light L can pass through the first mirror group 2, the area dimming display 3, the second mirror group 4, the imaging display 5 and 6 ”projection lens, which can improve the contrast of the image.

The contents disclosed above are only the preferred and feasible embodiments of the present invention, and therefore do not limit the scope of patent application of the present invention. Therefore, any equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention Within the scope of the patent.

Claims (8)

A projection system includes: a light source module capable of generating a light ray along a predetermined optical path; a first lens group, the first lens group is disposed adjacent to the light source module One side of the light source, and the first lens group is located on the predetermined optical path; an area dimming type display, the area dimming type display is disposed adjacent to one side of the light source module, And the area dimming display is located on the predetermined optical path; a second mirror group, the second mirror group is disposed adjacent to one side of the light source module, and the second mirror group Located on the predetermined optical path; an imaging display, the imaging display is disposed adjacent to one side of the light source module, and the imaging display is located on the predetermined optical path; and a projection lens, so The projection lens is disposed adjacent to one side of the light source module, and the projection lens is located on the predetermined optical path; wherein the light can be dimmed through the first lens group and the area. Type display, said first A mirror group, the imaging display, and the projection lens; wherein the light passes through the imaging display and the projection lens to form an image light source imaged on a screen; wherein the area dimming display is provided Between the first mirror group and the second mirror group, the imaging display is disposed between the second mirror group and the projection lens; wherein the area dimming display is an LCoS panel, DLP panel or LCD panel; wherein the imaging display is an LCoS panel, a DLP panel or an LCD panel. The projection system according to claim 1, wherein a resolution of the area dimming display is less than or equal to a resolution of the imaging display. The projection system according to claim 1, wherein the area dimming display has a plurality of control regions, the imaging display has a plurality of pixel regions, and each of the control regions of the area dimming display One or more of the pixel regions respectively corresponding to the imaging display. The projection system according to claim 1, wherein the imaging display has a one-chip architecture or a multi-chip architecture. The projection system according to claim 1, wherein the area dimming display is disposed on a first imaging area of a light source, and the imaging display is disposed on a second imaging area of a light source. The projection system according to claim 1, further comprising: a control module electrically connected to the area dimming display and the imaging display. The projection system according to claim 6, wherein the area dimming display is controlled by the control module to adjust a luminous flux of the light passing through the area dimming display. A projection system includes: a light source module, a first mirror group, an area dimming display, a second mirror group, an imaging display, and a projection lens; wherein the first mirror group, the The area dimming display, the second mirror group, the imaging display, and the projection lens are disposed on a predetermined optical path; wherein a light generated by the light source module passes through the first mirror group, The area dimming display, the second mirror group, the imaging display, and the projection lens to form an image light source imaged on a screen; wherein the light generated by the light source module Adjusting the luminous flux of the light by adjusting the area dimming display; wherein a control area of the area dimming display corresponds to at least one pixel area of the imaging display; wherein the area adjusting An optical display is disposed between the first mirror group and the second mirror group, and the imaging display is disposed between the second mirror group and the projection lens; wherein the area adjustment LCoS panel type display is, DLP panel or LCD panel; wherein the imaging display is LCoS panels, DLP panel or LCD panel.