TW201917482A - Projection system - Google Patents

Abstract

The invention discloses a projection system, which comprises a light source module, a first mirror group, a regional dimming display, a second mirror group, an imaging display and a projection lens. The first mirror group, the area dimming type 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 mirror group, the area dimming type display, the second mirror group, the imaging display, and the projection lens to form an image light source. The light generated by the light source module is regulated by the area dimming display to adjust the luminous flux of the light. A control area of the area dimming display corresponds to at least one pixel area of the imaging display.

Description

 Projection system  

The present invention relates to a projection system, and more particularly to a projection system capable of improving image contrast.

First of all, 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-screen images have become corporate newsletters, conference events, educational training, and even home entertainment. It is an indispensable part of providing visual images. Therefore, the high image quality, high brightness and light weight of the projector have become a major indicator for consumers to purchase.

However, in the prior art, the conventional projection system is mostly a dynamic contrast technique for adjusting the contrast ratio of the image, that is, using Dynamic Global Dimming. However, the dynamic global dimming mechanism is to dim or brighten the image as a whole, thus causing poor visual performance of the image.

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 in view of the deficiencies of the prior art, that is, a technique for improving contrast without dynamic time division.

In order to solve the above technical problem, 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, a regional dimming display, a second mirror, and a An imaging display and a projection lens. The light source module is capable of generating a light 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 type display is disposed adjacent to one side of the light source module, and the area dimming type 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. Wherein the light can pass through the first mirror group, the regional dimming display, the second mirror 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 including a light source module, a first mirror group, a regional dimming display, a second mirror group, an imaging display, and a projection lens. Wherein the first mirror group, the regional dimming type display, the second mirror group, the imaging display, and the projection lens are disposed on a predetermined optical path. The light generated by the light source module passes through the first mirror group, the regional dimming display, the second mirror group, the imaging display, and the projection lens to form an image light source. . The light generated by the light source module is regulated by the area dimming display to adjust the luminous flux of the light. Wherein a control region of the regional dimming display corresponds to at least one pixel region of the imaging display.

One of the advantageous effects of the present invention is that the projection system provided by the embodiment of the present invention can utilize "the light can pass through the first mirror group, the regional dimming display, the second mirror, The technical solution of the imaging display and the projection lens can improve the contrast of the image.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

U‧‧‧Projection System

1‧‧‧Light source module

11‧‧‧First light source unit

12‧‧‧Second light source unit

13‧‧‧ Third light source unit

2‧‧‧ first mirror

3‧‧‧Regular dimming display

4‧‧‧Second mirror

5‧‧‧ imaging display

51‧‧‧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‧‧‧3rd light

P1‧‧‧first projected light

P2‧‧‧second projected light

P3‧‧‧3rd projection light

P11~Pij‧‧‧Regional area

M11~Mij‧‧‧pixel area

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

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

3 is a schematic diagram of another correspondence between a regional dimming display and an imaging display according to an embodiment of the present invention.

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

Figure 5 is a schematic illustration of the optical path of a projection system in accordance with a second embodiment of the present invention.

Figure 6 is a schematic illustration of an optical path of a projection system in accordance with a third embodiment of the present invention.

Figure 7 is a schematic illustration of an optical path of a projection system in accordance with a fourth embodiment of the present invention.

Figure 8 is a schematic illustration of an optical path of a projection system in accordance with a fifth embodiment of the present invention.

The following is a specific embodiment to illustrate the implementation of the "projection system" disclosed in the present invention, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in the specification. The present invention may be carried out or applied in various other specific embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention. In addition, the drawings of the present invention are merely illustrative and are not intended to be stated in the actual size. The following embodiments will further explain the related technical content of the present invention, but the disclosure is not intended to limit the scope of the present invention.

It will 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 are not limited by these terms. These terms are used to distinguish one element from another, or a signal and another. Also, as used herein, the term "or" may include all combinations of any one or more of the associated listed items.

[First Embodiment]

First, referring to Fig. 1, Fig. 1 is a schematic view showing an optical path of a projection system according to a first embodiment of the present invention. The present invention provides a projection system U comprising a light source module 1, a first mirror group 2, a regional 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 ultrahigh pressure mercury lamp such as an Ultra-High Efficiency (UHE) or an Ultra-High Performance (UHP). A light-emitting diode (LED) or a laser may be used. In other embodiments, the light source module 1 may also be composed of three light source units (see FIG. 7 and FIG. 8 is composed of a first light source unit 11, a second light source unit 12, and a third light source unit 13), and the three light source units can respectively generate red light (generated by the first light source unit 11) and green light (by the first The two light source units 12 generate) and the blue light (generated by the third light source unit 13). It should be noted that FIG. 1 in the first embodiment is a schematic diagram for explaining the main concept of the present invention, and the specific embodiment will be further described in the subsequent embodiments.

As described above, in the first embodiment, the first mirror group 2 can 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. Next, the area dimming type display 3 can be disposed adjacent to one side of the light source module 1, and the area dimming type 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. Furthermore, an imaging display 5 (Imaging Micro Display) can 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. In the embodiment of the present invention, the area dimming type display 3 can be disposed between the first mirror group 2 and the second mirror group 4, and the imaging display 5 can 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 mirror group 2, the area dimming type display 3, the second mirror group 4, the imaging display 5, and the projection lens 6. That is, the light ray L can sequentially pass through the area dimming type display 3 and the imaging display 5. Further, after the light L passes through the imaging display 5 and the projection lens 6, an image light source (not shown) formed on a screen 7 (the screen 7 can be a wall or a projection screen) can be formed. In addition, it should be noted that the specific structures 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 well-known in the art, and are not described herein again.

In view of the above, it should be particularly noted that the light L that passes through (or can be said to pass through) the first mirror group 2 is imagewise projected onto the area dimming type display 3, that is, through the area dimming type display 3 The light ray L is an imaged light type. For example, the area illuminating display 3 can be a transmissive panel. However, the present invention is not limited thereto. In other embodiments, the regional dimming display 3 can also be used. A reflective LCoS (Liquid Crystal on Silicon) panel or a Digital Light Processing (DLP) panel is used, but at this time, for example, a polarization or a total internal reflection Prism (Total Internal Reflection Prism) is required. TIR Prism) used. 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 type display 3 can be disposed on a first imaging area of a light source, and the imaging display 5 can be disposed on a second imaging area of a light source. Thereby, the area dimming type display 3 can be used as a light valve. In addition, it should be noted that, in the first embodiment, the imaging display 5 may be an LCoS (Liquid Crystal on Silicon) display. However, in other embodiments, the first mirror group 2 may also be changed. The architecture of the second mirror group 4 is such that the imaging display 5 is an LCD (Liquid Crystal Display) or a DLP (Digital Light Processing), and the invention is not limited thereto. In other words, the imaging display 5 can be an LCoS panel, a DLP panel, or an LCD panel.

Next, please refer to FIG. 2, which is a schematic diagram of one of the regional dimming display and the imaging display according to an embodiment of the present invention. The correspondence between the regional dimming display 3 and the imaging display 5 will be further described below. In detail, the area dimming type display 3 may have a plurality of control areas (P11 to Pij), the imaging display 5 may have a plurality of pixel areas (M11 to Mij), and the plurality of control areas Pij of the area dimming type display 3 may be Corresponding to the plurality of pixel regions Mij of the imaging display 5, respectively. For example, the resolution of the area dimming display 3 can be less than or equal to the resolution of the imaging display 5. Preferably, the resolution of the area dimming type display 3 can be smaller than the resolution of the imaging display 5 to achieve a cost reduction effect.

Further, referring to FIG. 2, 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. Meanwhile, the plurality of control regions Pij of the area dimming type display 3 may each be a lattice region, and each of the lattice regions may be controlled by a driving wafer (not shown) of the area dimming type display 3, so that Each of the control regions Pij can be selectively turned on or off. Thereby, the luminous 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 regulated by the area dimming type display 3 to adjust the luminous flux of the light L. In other words, the projection system U provided by the embodiment of the present invention can have the effect of local dimming control by the arrangement of the area dimming type display 3. Thereby, the contrast of the image light source imaged on the screen 7 can be further improved. Therefore, in 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 type display 3 can be a pixel level dimming display. (Pixel Level Dimming Micro Display). In other words, assuming that the area dimming type display 3 is two megapixels, that is, there are two million control areas Pij that can respectively control the light rays L passing through the control areas Pij.

Referring to FIG. 3, FIG. 3 is another schematic diagram of a regional dimming display and an imaging display according to an embodiment of the present invention. In the embodiment of FIG. 3, the resolution of the regional dimming display 3 is shown. It may be smaller than the resolution of the imaging display 5, that is, the regional dimming type display 3 has a plurality of adjustment areas Pij, the imaging display 5 has a plurality of pixel areas Mij, and each of the control areas Pij of the area dimming type display 3 corresponds to At least two pixel regions Mij of the imaging display 5. That is, one of the control regions Pij of the area dimming display 3 corresponds at least to one of the pixel regions Mij of the imaging display 5. Therefore, from the comparison of FIG. 3 and FIG. 2, in the embodiment of FIG. 3, one of the control regions Pij of the area dimming display 3 may correspond to the four pixel regions Mij of the imaging display 5, however, in other implementations. In the mode, one of the control regions Pij of the regional dimming display 3 may be four or more pixel regions Mij or two to four pixel regions Mij corresponding to the imaging display 5, which is not limited by the present invention. . That is, each of the control regions Pij of the area dimming type display 3 may correspond to one or more pixel areas Mij of the imaging display 5, respectively.

4 is a functional block diagram of a projection system according to an embodiment of the present invention. In the embodiment of the present invention, the projection system U may further include a control module 8 that can be electrically It is connected to the regional dimming display 3 and the imaging display 5. In addition, the area dimming type display 3 can control the light flux of the light L passing through the area dimming type display 3 by the control of the control module 8. For example, the control module 8 can include a video processing unit (VPU, not shown) and a plurality of control regions Pij for selectively controlling the regional dimming display 3. Or a Proprietary Pixel Level Dimming Processing Unit (not shown). In addition, the area dimming type display 3 may include a regional dimming type 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 regional dimming type display driving chip and the imaging display driving chip, thereby controlling the area dimming type 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 adjust the luminous flux of the light L through a control module 8 and a control region Pij of the regional dimming display 3. It can correspond to at least one pixel area Mij of the imaging display 5. Further, the control module 8 can determine which areas of the brightness need to be adjusted according to the received signals, thereby improving the contrast of the image.

In view of the above, please refer to FIG. 2 and FIG. 4, and the manner in which the control module 8 controls the plurality of control regions Pij of the area dimming display 3 will be further exemplified below. For example, the regional dimming display 3 and the imaging display 5 may be a light combining module composed of a three-piece R (red), G (green), and B (blue) display panels, and each color has The gray level of the 8-bit is displayed, therefore, the state of the control 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 respectively 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 combinations, while Rij, Gij and Bij are The grayscale value of the three colors. Therefore, if 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 above-described control modes.

[Second embodiment]

First, please refer to FIG. 5. FIG. 5 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 can include a light source module 1 (for example, the light source module 1 can be UHP), a first mirror group 2, a regional dimming display 3, and a second The mirror set 4, an imaging display 5, and a projection lens 6. Further, the first mirror group 2, the area dimming type display 3, the second mirror group 4, the imaging display 5, and the projection lens 6 are disposed on a predetermined optical path. At the same time, the area dimming display 3 can be located between the imaging display 5 and the light source module 1. It should be particularly noted that the relationship between the regional dimming display 3 and the imaging display 5 is similar to that of the previous embodiment, and details are not described herein again, that is, the regional dimming display 3 can pass through the control module 8. Control to adjust the luminous flux of the light L passing through the area dimming type display 3.

Next, referring to FIG. 5, in the second embodiment, the projection system U provided by the second embodiment may be a projection architecture of a three-chip LCD. The imaging display 5 can 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, after the light L generated by the light source module 1 passes through the first mirror group 2, the regional dimming display 3, and the second mirror group 4, a projection can be formed to the first imaging. The first projection light P1 on the display unit 51, the second projection light P2 projected onto the second imaging display unit 52, and a third projection light P3 projected onto the third imaging display unit 53. Then, the first projection light P1, the second projection light P2, and the third projection light P3 are combined by a light combining unit (not labeled), and are projected into the projection lens 6, thereby forming an image. The image source on a screen 7.

In the above, for example, the first mirror group 2 may include at least one polarization converter (PS-Converter, unlabeled in the figure) and a lens group (not labeled in the figure). At the same time, the second lens group 4 may include at least one dichroic Mirror (not labeled in the figure), a mirror (not labeled in the figure), and a lens group (not labeled in the figure). It should be noted that the optical components of the first mirror group 2 (such as a polarization converter and a lens group) and the optical components of the second mirror group 4 (such as a color separation sheet, a mirror, and a lens group) are in the technical field. The techniques well known to the person are not repeated here.

[Third embodiment]

First, please refer to FIG. 6. FIG. 6 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 greatest difference between the third embodiment and the second embodiment is that the second mirror group 4 and the imaging display 5 provided by the third embodiment can be different from the foregoing second embodiment. In the third embodiment, the imaging display 5 can be an LCoS display. In addition, the imaging display 5 can 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 can be UHP) passes through the first mirror group 2, the area dimming type display 3, and the second After the mirror group 4, a first projection light P1 projected onto the first imaging display unit 51, a second projection light P2 projected onto the second imaging display unit 52, and a projection onto the third imaging display unit 53 may be formed. The third projected light P3. 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) for combining light. Finally, it is projected into the projection lens 6 to form an image light source imaged on a screen 7.

In addition, the structural features of the light source module 1, the first mirror group 2, the area dimming type display 3, the second mirror group 4, the imaging display 5, and the projection lens 6 in the projection system U and the foregoing embodiments are described. Similarly, it will not be described again here, that is, the area dimming type display 3 can control the light flux of the light L passing through the area dimming type display 3 by the control of the control module 8. Furthermore, the optical components of the first mirror group 2 and the optical components of the second mirror group 4 are well known to those skilled in the art and will not be described herein.

[Fourth embodiment]

First, please refer to FIG. 7. FIG. 7 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 can include a light source module 1 (for example, the light source module 1 can be an LED or a laser), a first mirror group 2, a regional dimming display 3, and a The second mirror group 4, an imaging display 5, and a projection lens 6. Further, the first mirror group 2, the area dimming type display 3, the second mirror group 4, the imaging display 5, and the projection lens 6 are disposed on a predetermined optical path. At the same time, the area dimming display 3 can be located between the imaging display 5 and the light source module 1. It should be particularly noted that the relationship between the regional dimming display 3 and the imaging display 5 is similar to that of the previous embodiment, and details are not described herein again, that is, the regional dimming display 3 can pass through the control module 8. Control to adjust the luminous flux of the light L passing through the area dimming type display 3.

In the fourth embodiment, the light source module 1 can include a first light source unit 11, a second light source unit 12, and a third light source unit 13, and the light source L can be used by the first light source unit 11, a first light ray L1, a second light ray L2, and a third light ray L3 respectively generated by the two light source units 12 and the third light source unit 13 , and the first light L1, the second light L2 and the third light L3 Red, green, and blue light can be generated separately. At the same time, the first light L1, the second light L2, and the third light L3 can be merged by the first mirror 2, and are projected to the first mirror 2, the regional dimming display 3, and the second mirror 4 to On the imaging display 5. For example, the imaging display 5 provided by the fourth embodiment may be an LCoS display, but the invention is not limited thereto. Furthermore, the optical components of the first mirror group 2 and the optical components of the second mirror group 4 are well known to those skilled in the art and will not be described herein.

[Fifth Embodiment]

First, please refer to FIG. 8. FIG. 8 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 by the fifth embodiment can be different from the foregoing. Fourth embodiment. Further, the architecture of the projection system U provided by 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 mirror 2, the area dimming display 3, and the second mirror 4. In addition, it should be noted that in other embodiments, the imaging display 5 may also be a one-piece architecture or a multi-chip architecture.

It should be particularly noted that the relationship between the regional dimming display 3 and the imaging display 5 is similar to that of the previous embodiment, and details are not described herein again, that is, the regional dimming display 3 can pass through the control module 8. Control to adjust the luminous flux of the light L passing through the area dimming type display 3. In addition, it should be noted that the optical components of the first mirror group 2 and the optical components of the second mirror group 4 are well known to those skilled in the art and will not be described herein.

[Advantageous Effects of Embodiments]

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 "the light L can pass through the first mirror group 2, the area dimming type display 3, the second mirror group 4, and the imaging display. 5 and the projection lens 6" technical solution, can enhance the contrast of the image.

The above disclosure is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, any equivalent technical changes made by using the present specification and the contents of the drawings are included in the application of the present invention. Within the scope of the patent.

Claims (10)

 A projection system comprising: a light source module, the light source module capable of generating a light along a predetermined optical path; a first mirror group, the first mirror group being disposed adjacent to the light source module Next to one side, and the first mirror 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 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 mirror group and the region Type display, said Lens group, said projection lens and said image forming display; wherein the imaging light through said display and said projection lens to form a light image on a screen image.    The projection system of claim 1, wherein the resolution of the regional dimming display is less than or equal to the resolution of the imaging display.    The projection system of claim 1, wherein the area dimming type display has a plurality of adjustment areas, the imaging display has a plurality of pixel areas, and each of the control areas of the area dimming type display Corresponding to one or more of the pixel regions of the imaging display, respectively.    The projection system of claim 1, wherein the area dimming type display is an LCoS panel, a DLP panel, or an LCD panel.    The projection system of claim 1, wherein the imaging display is an LCoS panel, a DLP panel, or an LCD panel.    The projection system of claim 1, wherein the imaging display is a one-piece architecture or a multi-chip architecture.    The projection system of claim 1, wherein the area dimming type 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 of claim 1, further comprising: a control module electrically connected to the regional dimming display and the imaging display.    The projection system of claim 8, 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 comprising: a light source module, a first mirror group, a regional dimming display, a second mirror group, an imaging display, and a projection lens; wherein the first mirror group, 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; wherein a light generated by the light source module passes through the first mirror, The area dimming display, the second mirror group, the imaging display, and the projection lens to form an image light source; wherein the light generated by the light source module is dimmed through the area The display of the type of display adjusts the luminous flux of the light; wherein a control region of the regional dimming display corresponds to at least one pixel region of the imaging display.