WO2012089113A1

WO2012089113A1 - Prism system and projector comprising the same

Info

Publication number: WO2012089113A1
Application number: PCT/CN2011/084769
Authority: WO
Inventors: Lili Jiang; Qingtao Meng; Gaojin QI
Original assignee: Byd Company Limited
Priority date: 2010-12-30
Filing date: 2011-12-27
Publication date: 2012-07-05
Also published as: CN102565896B; CN102565896A

Abstract

A prism system and a projector comprising the same are provided. The prism system comprises: an optical wedge (2) having a first optical plane (21) for receiving light and a second optical plane (22) for outputting light and configured to receive an incident light, refract and output the incident light; and an isosceles right-angled triangle prism (3) having first to third planes, adapted to couple with a diamond DMD chip (1 ), configured to refract and output the incident light received from the optical wedge to the diamond DMD chip, and configured to receive a reflection light from the diamond DMD chip and to totally reflect and output the reflection light at different angles based on the diamond DMD chip's control.

Description

PRISM SYSTEM AND PROJECTOR COMPRISING THE SAME

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and benefits of Chinese Patent Application Serial No. 201010614305.3, filed with the State Intellectual Property Office of P. R. China on December 30, 2010, the entire content of which is incorporated herein by reference.

FIELD

The present disclosure relates to a prism system and a projector comprising the same.

BACKGROUND

LED (Light Emitting Diode) miniature projector is widely used due to its high efficiency, good contrast ratio and long life etc. Currently, LED miniature projector mainly realize its projection by using conventional DMD (Digital Micro mirror Device) chip and prism system. The conventional DMD chip produces an image of 1280x720 dpi by using an orthogonal pixel array, each rotation axis of miniature reflection lens of the prism system forms an angle of 45 degree with the long side of the chip and the miniature reflection lens may be dedicated to display one image pixel on a displaying device. However, in order to realize higher resolution and low system cost, the new type DMD chip is a diamond DMD chip and employs a diamond pixel arrangement, that is, the miniature reflection lens is rotated by 45 degree relative to the conventional DMD chip, thus the angle between each rotation axis of miniature reflection lens and the long side of the chip is 90 degree. Therefore, the current prism system is not adapted to and cannot be coupled with the new DMD chip, so that the projection cannot be realized. SUMMARY

The present disclosure is directed to solve at least one of the problems existing in the prior art. Accordingly, a prism system and a projector comprising the same are provided, in which the prism system is adapted to and can be coupled with the diamond DMD (Digital Micro mirror Device) chip.

According to embodiments of a first aspect of the present disclosure, a prism system may be provided. The prism system may comprise: an optical wedge having a first optical plane to receive light and a second optical plane to output light and configured to receive an incident light, refract and output the incident light; and an isosceles right-angled triangle prism having first to third planes, adapted to couple with a diamond DMD chip, configured to refract and output the incident light received from the optical wedge to the diamond DMD chip, and configured to receive a reflection light from the diamond DMD chip and to totally reflect and output the reflection light at different angles based on the diamond DMD chip's control.

According to embodiments of a second aspect of the present disclosure, a projector comprising the prism system according to the embodiments of the fist aspect of the present disclosure may be provided. The projector may comprise: a light source configured to generate and output light; a light process unit configured to process the light from the light source and output an incident light; a prism system configured to receive the incident light from the light process unit, totally reflect the incident light and output the reflected light; a diamond DMD chip coupled with the prism system to receive and reflect the light output from the prism system, and control an output direction of the light reflected thereby from the prism system; and a projection objective lens configured to receive the reflected light output from the prism system and output the reflected light to a screen.

With the prism system and the projector according to embodiments of the present disclosure, the incident light may be firstly deflected with a small angle by the optical wedge and then refracted by the isosceles right-angled triangle prism to output to the diamond DMD chip. The diamond DMD chip may reflect the incident light received from the optical wedge. The diamond DMD chip has an ON state and an OFF state. The output angle of light from the diamond DMD chip may be different when DMD chip is in different states, and the reflection light output by the diamond DMD chip may be received and output by the isosceles right-angled triangle prism. The isosceles right-angled triangle prism may output the reflection light at different angles according to the different angles of the reflection light input to the isosceles right-angled triangle prism from the diamond DMD chip, that is, the reflection light may be output at two different angles by the isosceles right-angled triangle prism. The isosceles right-angled triangle prism has three planes and the optical wedge has two optical planes such that the angle between the planes of the first and second prisms and the incident light is predetermined. When the incident light enters into the prism system at the predetermined angle, the prism system may only output the reflection light at two different angles according to the two different states of the diamond DMD chip, that is, when the diamond DMD chip is in its two different states, the reflection light output by the prism system may form optical contrast, so that the diamond DMD chip is adapted to and can be coupled with prism system. In addition, the prism has a simple structure and the light transmit path may be simple, the times of light reflection and refraction may be decreased so as to reduce the energy loss during light transmission and increase the utilization rate. With the projector comprising the prism system, the prism system outputs the reflection light at two different angles, the reflection light output at one angle from the prism system may be output to the projection objective lens and then output to the screen by the projection objective lens for projection, and the reflection light at the other angle may not be output by the projection objective lens for projection, thus the projection with two different contrast degrees may be realized.

Additional aspects and advantages of the embodiments of present disclosure will be given in part in the following descriptions, become apparent in part from the following descriptions, or be learned from the practice of the embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The foregoing and other features and advantages of the disclosure will become apparent and more readily appreciated from the following descriptions taken in conjunction with the drawings in which:

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

Fig. 2 is a structural schematic view of a prism system according to a first embodiment of the present disclosure, in which the diamond DMD chip is in the ON state;

Fig. 3 is a structural schematic view of a prism system according to a first embodiment of the present disclosure, in which the diamond DMD chip is in the OFF state;

Fig. 4 is a structural schematic view of a prism system according to a second embodiment of the present disclosure, in which the diamond DMD chip is in the ON state;

Fig. 5 is a structural schematic view of a prism system according to a second embodiment of the present disclosure, in which the diamond DMD chip is in the OFF state;

Fig. 6 is a structural schematic view of a prism system according to a third embodiment of the present disclosure, in which the diamond DMD chip is in the ON state;

Fig. 7 is a structural schematic view of a prism system according to a third embodiment of the present disclosure, in which the diamond DMD chip is in the OFF state. DETAILED DESCRIPTION

Reference will be made in detail to embodiments of the present disclosure. The embodiments described herein with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure. The same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions.

A prism system according to a first embodiment of the present disclosure is shown in Fig.2 and 3, the prism system may comprise: an optical wedge 2 and an isosceles right-angled triangle prism 3. The optical wedge 2 is configured to receive and refract an incident light and has a first optical plane 21 to receive light and a second optical plane 22 to output light. The isosceles right-angled triangle prism 3 has three planes (a first plane 31, a second plane 32 and a third plane 33) and is coupled with a diamond DMD chip 1 and configured to refract and output the incident light received from the optical wedge 2 to the diamond DMD chip 1, to receive a reflection light from the diamond DMD chip 1 and to output the reflection light at different angles according to the diamond DMD chip l 's control. As shown in Figs. 2 and 3, the first optical plane 21 and the second optical plane 22 are perpendicular to the paper plane, and the first plane 31, the second plane 32 and the third plane 33 are also perpendicular to the paper plane.

In some embodiments, the optical wedge 2 may be a prism having a small refraction angle such that the incident light may be deflected by a small angle and then be output to DMD chip 1, and the isosceles right-angled triangle prism 3 may be a prism with three planes perpendicular to the paper in Figs. 2 and 3.

According to optical principle, the light will be totally reflected when it is incident on an interface at an incidence angle greater than the critical angle of total reflection. When two mediums having different refractive indexes are contacted with each other, whether the light transmitted from one medium to the other may enter into the other medium will be determined by the incidence angle thereof, that is, the light may enter into the other medium or be totally reflected to the one medium according to the incidence angle of the light. For example, the K9 glass has a refractive index n of 1.5164, when it is disposed in the air (refractive index n' of the air is 1), n and n' represents the refractive indexes of the air and the glass K9 at the interface respectively. Assuming that the light enters from the glass into the air at an incidence angle a and the incidence angle a is the critical angle of total reflection, the emergence angle a' of the light output from the air is 90 degree, according to Snell'Law, the critical angle of total reflection is arcsin[n ' sin(a')/ sin(a)]=41.3 degree, that is, when the incidence angle of the light from the glass to air is greater than 41.3 degree, the incident light may will be totally reflected.

In some embodiments, the angle of the incident light may be deflected by a small angle via the optical wedge 2, then the incident light enters into and may be refracted by the isosceles right-angled triangle prism 3 to output to the diamond DMD chip 1. The diamond DMD chip 1 may totally reflect the incident light. Since the digital micro-mirror unit of the diamond DMD chip 1 may reflect the incident light in a range of 12 degree to -12 degree, so that the diamond DMD chip 1 has ON and OFF states. The output angle of the light reflected by the DMD chip 1 may differ when the diamond DMD chip is in its different states. The reflection light reflected by the diamond DMD chip 1 may be received and output by the isosceles right-angled triangle prism 3 and the isosceles right-angled triangle prism 3 may output the reflection light at different angles according to the input angles of the reflection light received from the diamond DMD chip 1, that is, the reflection light may be output at two different angles by the isosceles right-angled triangle prism 3. At the same time, the isosceles right-angled triangle prism 3 has three planes and the optical wedge 2 has two optical planes, as shown in Fig.l. The planes of the isosceles right-angled triangle prism 3 and the optical wedge 2 may be perpendicular to the paper plane in Figs. 2 and 3, so that angle between the optical wedge 2 as well as the isosceles right-angled triangle prism 3 and the incident light may be predetermined by the cooperation of the isosceles right-angled triangle prism 3, the optical wedge 2 and the integral lens 54. When the incident light enters into the prism system at the predetermined angle, the prism system may only output the reflection light at two different angles according to the two different states, that is, when the diamond DMD chip 1 is in its two different states, the reflection light output at the two different angles may form an optical contrast, so that the DMD chip 1 is adapted to and can be coupled with the prism system, and the prism system has a simple structure and the light transmit path is also simple, the times of light reflection and refraction may be decreased to reduce the energy loss during light transmission and increase the utilization rate.

In order to realize the projection, as shown in Fig.l, a projector may be also provided by the embodiments of the present disclosure and comprise: a light source 4 configured to generate and output light; a light process unit configured to process the light from light source and output an incident light; a prism system configured to receive the incident light from the light process unit totally reflect and output the incident light received from the light process unit; a diamond DMD chip 1 coupled with the prism system to receive and reflect the light output from the prism system and control the direction of the reflection light output from the prism system; and a projection objective lens 6 configured to receive the reflection light from the prism system and output the reflection light to screen, in which the prism system may be the prism system described with reference to the above embodiments and may comprise: the optical wedge 2 and the isosceles right-angled triangle prism 3. The optical wedge 2 has the first optical plane 21 to receive light and the second optical plane 22 to output light and is configured to receive an incident light, refract and output the incident light. The isosceles right-angled triangle prism 3 has the first to third planes 31, 32, 33, and is adapted to couple with a diamond DMD chip, configured to refract and output the incident light received from the optical wedge to the diamond DMD chip, and configured to receive a reflection light from the diamond DMD chip and to totally reflect and output the reflection light at different angles based on the diamond DMD chip's control.

The diamond DMD chip 1 may have ON and OFF states. When the diamond DMD chip 1 is ON, that is, the angle between the digital micro-mirror unit and the diamond DMD chip 1 may be 12 degree, and the diamond DMD chip 1 may reflect the light received from the optical wedge 2 and output the reflection light in axial direction thereof, then the reflection light may enter and be reflected by the isosceles right-angled triangle prism 3 and output to the projection objective lens 6. When the angle between the digital micro-mirror unit and the diamond DMD chip 1 is -12 degree, the reflection light from the isosceles right-angled triangle prism 3 will not be output to the projection objective lens 6, so that the prism system may output the reflection light at two different angles according to the states of DMD chip 1, and the reflection light output at one angle may be output by the projection objective lens 6 to the screen for projection and the reflection light output at the other angle may not be output by the projection objective lens 6 to the screen, thus projection with two different contrast ratios may be realized. Therefore, the prism system is adapted to and can be coupled with the diamond DMD chip 1.

In some embodiments of the present disclosure, the light source 4 may be LED (Light

Emitting Diode) tricolor light source and configured to output a RGB (red, green, blue) light. Furthermore, the light process unit may comprise: a collimating lens assembly 51 configured to receive the light from the tricolor light source and output R light, G light and B light parallel to each other; a tricolor synthetic lens 52 configured to synthesize the R light, G light and B light from the collimating lens into mixed parallel lights and output the mixed parallel lights; a fly-eye lens assembly 53 configured to receive the mixed parallel lights from the tricolor synthetic lens and output parallel lights with facula adapted to the diamond DMD chip; and an integral lens 54 configured to receive and converge parallel light from fly-eye lens assembly 53 and output the converged parallel lights to the prism system.

In some embodiments, a collimating lens assembly 51 may be disposed in front of the light resource of each color, the light of each color may be diverged to be parallel lights to increase the utilization ratio of the light source; then the lights of the three different colors may be mixed by the tricolor synthetic lens 52 to form mixed parallel lights to be output, thus the size of the projector may be reduced and the light utilization ratio of the projector may be increased. The facula of the mixed parallel lights may be shaped by the fly-eye lens assembly 53, and when the light facula is larger than the diamond DMD chip 1, only the light output onto the diamond DMD chip 1 may be reflected and used, the other light may be lost. Optionally, the facula may be shaped to mach or suitable for with the shape of the DMD chip 1. If the facula output to the diamond DMD chip is not even, the projected light will be not even either, thus disadvantageously affect the effect of the projection, and the projected image may be shown with one dark side and one bright side. In order to increase the utilization ratio of the light and the evenness of the projected picture, the fly-eye lens assembly 53 may be utilized to change the facula of the mixed parallel lights into an even facula , so that the even facula is adapted to and can be coupled with the DMD chip 1. After the facula of the light being changed into even facula, the light output from fly-eye lens assembly 53 may be converged by the integral lens 54 and then output to the optical wedge 2 of the prism system.

In some embodiments of the present disclosure, the first plane 31 of the isosceles right-angled triangle prism 3 is configured to receive an incident light from the optical wedge 2 refract and output the received incident light. The second plane 32 of the isosceles right-angled triangle prism 3 is parallel to the diamond DMD chip 1 and configured to receive the light output from the first plane 31, to refract and output the received incident light to the diamond DMD chip 1, to receive the reflection light from the diamond DMD chip 1 and to refract and output the reflection light from the diamond DMD chip 1 to the first plane 31. The first plane 31 is also configured to totally reflect the reflection light from the second plane 32. The third plane 33 is perpendicular to the second plane 32 and configured to output the totally reflected light from the first plane 31.

It is known from the above description that: as shown in Fig.2, the first plane 31 may be the plane of the isosceles right-angled triangle prism 3 in which the hypotenuse of the cross section of isosceles right-angled triangle prism 3 is located, and the second plane 32 and the third plane 33 may be the planes of the isosceles right-angled triangle prism 3 in which the two right-angle sides of the cross section of the isosceles right-angled triangle prism 3 are located respectively, so that the angle between the first plane 31 and the second plane 32 may be 45 degree and the angle between the first plane 31 and the third plane 33 may also be 45 degree. When the diamond DMD chip 1 is ON, as shown in Fig.2, the reflection light output from the optical wedge 2 may be refracted and output by the first plane 31, then the light from the first plane 31 may be refracted by the second plane 32 and output to diamond DMD chip 1. The angle between the digital micro-mirror unit and the diamond DMD chip 1 is 12 degree, and the diamond DMD chip 1 may reflect the light to the first plane 31 through the second plane 32, and the reflected light by the diamond DMD chip 1 is almost perpendicular to the second plane 32, so that the angle between the first plane 31 and the reflection light may be about 45 degree which is greater than the critical angle of total reflection and the reflection light may be totally reflected by the first plane 31 and output to the third plane 33. The third plane 33 may output the reflection light which is almost vertical in Fig. 2 and may be output by the projection objective lens 6 to the screen for projection.

When the diamond DMD chip 1 is OFF, as shown in Fig.3, the reflection light output from the optical wedge 2 may be refracted and output by the first plane 31, then the light from the first plane 31 may be refracted by the second plane 32 and output to diamond DMD chip 1. The angle between the digital micro-mirror unit and the diamond DMD chip 1 is -12 degree, and the diamond DMD chip 1 may reflect the light to the first plane 31 through the second plane 32 at an angle of almost 36 degree to the second plane 32, the reflection light may be refracted by the second plane 32 and output to the third plane 33, the third plane 33 may reflect and output the reflection light at the other angle, and the light reflected and output by the third plane may not be output by the projection objective lens 6 to the screen, thus relative higher contrast ratio may be realized.

Furthermore the first optical plane 21 of the optical wedge 2 is configured to receive, refract and output the incident light, and the second optical plane 22 of the optical wedge 2 is configured to receive the incident light from the first optical plane 21, refract and output the received incident light to the diamond DMD chip 1.

Since the angle between the first optical plane 21 and the second optical plane 22 is small, the light entering into and refracted by the first optical plane 21 may be entered into the second optical plane 22 with deflection of small angel. In this embodiment, the angle between the first optical plane 21 and the second optical plane 22 may be 6-8 degree, so that the angle between the light refracted and output by the optical wedge 2 to the isosceles right-angled triangle prism 3, and refracted and output by the first plane 31 and the second plane 32 of the isosceles right-angled triangle prism 3 and the plane in which the DMD chip 1 is located may be about 24 degree, so that when the diamond DMD chip 1 is ON, the reflection light output from the diamond DMD chip 1 may be perpendicular to the plane in which the DMD chip 1 is located . When the diamond DMD chipl is ON, the angle between the reflection light output from the diamond DMD chip 1 and the second plane 32 is about 36 degree.

In order to improve projection effect, the optical wedge 2 and the isosceles right-angled triangle prism 3 may be formed by glass materials with low refraction rate n and high dispersion number v, for example, the refraction rate n may be smaller than 1.55 and the dispersion number v may be greater than 50. In some embodiments, the optical wedge 2 and the isosceles right-angled triangle prism 3 may be formed by glass materials of BK7 or K9 with the refraction rate n=1.5164 and dispersion number v=64.13333, thus improving the projection effect.

Furthermore, in order to reduce the energy loss during light transmission from the air to the optical wedge 2, the angle between the incident light and the first optical plane 21 may be 90 degree, so that the light may be entered into the optical wedge 2 along the normal of the first optical plane 21, the energy loss during light transmission may be fewer and there may be no angle deflection. When the angle between the incident light and the first optical plane 21 is not 90 degree, the light may be reflected or deflexed when entering into the first optical plane 21, the energy loss during light transmission may be much and there may be large angle deflection. Therefore, the angle between the incident light and the first optical plane 21 may be 90 degree to reduce energy loss and to make the prism system adapted to (match) and capable of coupling with the DMD chip 1.

In a second embodiment of the present disclosure, as shown in Fig.4 and 5, in order to avoid the incident light deflection in the optical wedge 2 and the isosceles right-angled triangle prism 3, the second optical plane 22 of the optical wedge 2 may be coupled and parallel to the first plane 31 of the isosceles right-angled triangle prism 3. In some embodiments, the second optical plane 22 the optical wedge 2 and the first plane 31 of the isosceles right-angled triangle prism 3 may be coupled via air space layer, so that the assembly and disassemble process between the first plane 31 of the isosceles right-angled triangle prism 3 and the second optical plane 22 of the optical wedge 2 are easy. The angle between the first optical plane 21 and the second optical plane 22 may be about 2-5 degree, so that the optical wedge 2 may be adapted to and can be coupled with the diamond DMD chip 1. Furthermore, in order to improve projection effect, the optical wedge 2 and the isosceles right-angled triangle prism 3 may be formed by glass materials with low refraction rate n and high dispersion number v, for example, the refraction rate n may be smaller than 1.55 and the dispersion number v may be greater than 50. In some embodiments, the optical wedge 2 and the isosceles right-angled triangle prism 3 may be formed by glass materials of BK7 or K9 with the refraction rate n=1.5164 and dispersion number v=64.13333, thus improving the projection effect.

In a third embodiment of the present disclosure, as shown in Figs.6 and 7, the integral lens 54 may comprise an arc plane 541 and a straight plane 542. The arc plane 541 is configured to receive and converge the incident light, and the straight plane 542 is coupled with the first optical plane 21 and configured to receive the light from the arc plane 541, and to refract and output the received light to the first optical plane 21 of the optical wedge 2. The first optical plane 21 of the optical wedge 2 may be a plane perpendicular to the paper plane in Figs. 6 and 7 so as to be convenient to couple with the optical wedge 2, and the integral lens 54 may be coupled with the optical wedge 2 and form an integral body, so that the reliability of the prism system may be enhanced and the structure of the prism system may be simple.

Furthermore, the straight plane 542 may be attached and adhered to the first optical plane 21 of the optical wedge 2. Because the integral lens 54 may be coupled with the optical wedge 2 via air space layer, the integral lens 54 may be easily separated from the optical wedge 2. Optionally, the straight plane 542 may be adhered to the first optical plane 21 via optical glue such that the integral lens 54 and the optical wedge 2 form an integral body, thus the reliability of the prism system may be enhanced and the structure of the prism system may be simple. The DMD chip 1 may be disposed on focus point of the integral lens 54 in some embodiments of the present disclosure.

Furthermore, the angle between the first optical plane 21 and the second optical plane 22 of the optical wedge 2 may be about 6-8 degree such that the optical wedge 2 may be adapted to and can be coupled with the DMD chip 1.

Furthermore, in order to improve projection effect, the optical wedge 2 and the isosceles right-angled triangle prism 3 may be formed by glass materials with low refraction rate n and high dispersion number v, for example, the refraction rate n may be smaller than 1.55 and the dispersion number v may be greater than 50. In some embodiments, the optical wedge 2 and the isosceles right-angled triangle prism 3 may be formed by glass materials of BK7 or K9 with the refraction rate n=1.5164 and dispersion number v=64.13333, thus improving the projection effect.

Furthermore, in order to manufacture the prism system simply, the integral lens 54 and the optical wedge 2 may be formed integrally, so that the optical wedge 2 and the integral lens 54 may be formed by the same material with low refraction rate n and high dispersion number v, the refraction rate n may be smaller than 1.55 and the dispersion number v may be greater than 50, and the preferred material of the optical wedge 2 may be a plastic material of PMMMA type with the refraction rate n = 1.4918 and the dispersion number v =57.3274, and the isosceles right-angled triangle prism 3 may be formed by the glass materials of BK7 or K9 with the refraction rate n=1.5164 and dispersion number v=64.13333, thus improving the projection effect.

Furthermore, when the integral lens 54 and the optical wedge 2 are formed integrally, the angle between first optical plane 21 and the second plane of the optical wedge 2 may be about 9-14 degree, such that the optical wedge 2 is adapted to and can be coupled with the DMD chip 1.

Reference throughout this specification to "an embodiment", "some embodiments", "some embodiments", "an example", "a specific examples", or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least some embodiments or example of the disclosure. Thus, the appearances of the phrases such as "in some embodiments", "in some embodiments", "in an embodiment", "an example", "a specific examples", or "some examples" in various places throughout this specification are not necessarily referring to the same embodiment or example of the disclosure. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that changes, alternatives, and modifications may be made in the embodiments without departing from spirit and principles of the disclosure. Such changes, alternatives, and modifications all fall into the scope of the claims and their equivalents.

Claims

WHAT IS CLAIMED IS:

1. A prism system, comprising:

an optical wedge having a first optical plane to receive light and a second optical plane to output light and configured to receive an incident light, refract and output the incident light; and an isosceles right-angled triangle prism having first to third planes, adapted to couple with a diamond DMD chip, configured to refract and output the incident light received from the optical wedge to the diamond DMD chip, and configured to receive a reflection light from the diamond DMD chip and to totally reflect and output the reflection light at different angles based on the diamond DMD chip's control.

2. The prism system of claim 1, wherein the first plane of the isosceles right-angled triangle prism is configured to receive an incident light from the optical wedge, refract and output the received incident light;

wherein the second plane is parallel to the diamond DMD chip and configured to receive the incident light output from the first plane, to refract and output the received incident light to the diamond DMD chip, to receive the reflection light from the diamond DMD chip and to refract and output the reflection light to the first plane;

wherein the first plane is further configured to totally reflect the reflection light output from the second plane; and

wherein the third plane is perpendicular to the second plane and configured to output the totally reflected light from the first plane.

3. The prism system of claim 1, wherein an angle between the first optical plane of the optical wedge and the second optical plane of the optical wedge is 6-8 degree.

4. The prism system of claiml, wherein the incident light is perpendicular to the first optical plane of the optical wedge.

5. The prism system of claim 1, wherein the second optical plane of the optical wedge is coupled and parallel to the first plane.

6. The prism system of claim 5, wherein an angle between the first optical plane of the optical wedge and the second optical plane of the optical wedge is 2-5 degree.

7. A projector, comprising:

a light source configured to generate and output light; a light process unit configured to process the light from the light source and output an incident light;

a prism system configured to receive the incident light from the light process unit, totally reflect the incident light and output the reflected light;

a diamond DMD chip coupled with the prism system to receive and reflect the light output from the prism system, and control an output direction of the light reflected thereby from the prism system; and

a projection objective lens configured to receive the reflected light output from the prism system and output the reflected light to a screen;

wherein the prism system is any one of claims 1-6.

8. The projector of claim 7, wherein the light source is tricolor light source and configured to output R, G, B color light.

9. The projector of claim 8, wherein the light process unit comprises:

a coUimating lens assembly configured to receive light from the tricolor light source and output parallel R, G, B color light;

a tricolor synthetic lens configured to synthesize the parallel R, G, B color light from the coUimating lens into mixed parallel light and output;

a fly-eye lens assembly configured to receive mixed parallel lights from the tricolor synthetic lens and output parallel light with rectangular facula; and

an integral lens configured to receive, converge parallel light from fly-eye lens assembly and output it to the prism system.

10. The projector of claim 9, wherein the integral lens comprises:

an arc plane configured to receive and converge the incident light; and

a straight plane coupled to the first optical plane and configured to receive the light from the arc plane, refract and output the light received from the arc plane to the first optical plane of the optical wedge.

11. The projector of claim 10, wherein the straight plane is attached and adhered to the first optical plane.

12. The projector of claim 10, wherein the integral lens and the optical wedge are integrally formed.

13. The projector of claim 12, wherein the angle between the first optical plane of the optical wedge and the second optical plane of the optical wedge is 9-14 degree.