Three-piece type LCOS projection system

Abstract

The utility model discloses a three-piece type LCOS projection system which comprises a light source assembly, a dodging device, a first relay element lens, a light splitting element, a first LCOS assembly, a reflecting element, a second LCOS assembly, a third LCOS assembly, a light combining assembly and a projection lens. According to the LCOS projection system, the three LCOS chips are adopted, the energy of the S-line polarized light and the P-line polarized light generated by light splitting of the polarization light splitter is fully utilized, the light energy intensity after projection imaging is improved, and a larger area can be projected. Compared with an existing three-piece LCOS system, the system has the advantages of being simple in structure, small in size, high in brightness and compact in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of projection light sources, and more specifically to a three-chip LCOS projection system. Background Art

[0002] In the field of projection display, projection display technology is mainly divided into four categories: CRT, LCD, DLP, and LCOS. Each display technology has its own characteristics: (1) CRT projection display technology has been eliminated by the market due to factors such as low brightness, limited display size, and large size; (2) LCD projection display technology has developed very rapidly. Due to its advantages such as small size, light weight, and low cost, its main technical patents are controlled by foreign countries; (3) DLP projection display technology has the advantages of high light energy utilization, fast response speed, and small size. It is currently the most widely used, mature technology, and the largest market share projection technology; (4) LCOS projection display technology combines the advantages of LCD and DLP projection display technologies. It has the advantages of high resolution, delicate images, high light energy utilization, and high contrast. In addition, the chips of this technology have gradually been domestically produced. It is currently the most widely used technology in the projection field. In LCOS projection technology, the three-chip projection system is widely used due to its high light energy utilization and good reliability, but it also has obvious defects: the three-chip stacking solution leads to a large overall volume, complex debugging, and high maintenance costs.

[0003] Therefore, how to design a three-chip LCOS system with high color gamut, high brightness, high efficiency and compact structure is a technical problem to be solved. Utility Model Content

[0004] Based on this, it is necessary to provide a three-chip LCOS projection system with high color gamut, high brightness, high efficiency and compact structure to address the existing problems.

[0005] The embodiment of the present application provides a three-chip LCOS projection system, comprising:

[0006] A light source assembly, used for outputting light of a first wavelength band, light of a second wavelength band and light of a third wavelength band;

[0007] A light homogenizing device, used for homogenizing and outputting the first wavelength band light, the second wavelength band light and the third wavelength band light emitted by the light source assembly;

[0008] A first relay element mirror, used for respectively converging and outputting the first wavelength band light, the second wavelength band light and the third wavelength band light emitted by the light homogenizing device;

[0009] The light splitting element is used to transmit the incident light of the first wavelength band and the second wavelength band to make them emerge along the first optical path to the first LCOS component, and reflect the incident light of the third wavelength band to make it emerge along the third optical path to the third LCOS component;

[0010] The first LCOS component is used to transmit the light of the first wavelength band to make it emit along the first optical path to the reflection component, and reflect the light of the second wavelength band to make it emit along the second optical path to the light combining component;

[0011] A reflective element, used for reflecting the first wavelength band light emitted by the first LCOS component to the second LCOS component;

[0012] The second LCOS component is used to reflect the light of the first wavelength band so that it can be emitted to the light combining component along the first optical path;

[0013] The third LCOS component is used to reflect the light of the third wavelength band so that it can be emitted to the light combining component along the third optical path;

[0014] A light combining component, used for combining the first wavelength band light, the second wavelength band light and the third wavelength band light and outputting the combined light to a projection lens;

[0015] The projection lens is used to output and project the combined light beam.

[0016] Preferably, the first wavelength band light, the second wavelength band light and the third wavelength band light are all linearly polarized light, and the polarization state of the first wavelength band light is perpendicular to the polarization states of the second wavelength band light and the third wavelength band light.

[0017] Preferably, the first LCOS component includes a second relay lens, a third relay lens, a first PBS prism, a first LCOS chip, and a 1 / 2 wave plate; wherein the first PBS prism transmits P light and reflects S light.

[0018] Preferably, the second LCOS component includes a fourth relay lens, a second PBS prism and a second LCOS chip; the second PBS prism transmits P light and reflects S light.

[0019] Preferably, the third LCOS component includes a fifth relay lens, a third PBS prism and a third LCOS chip; the third PBS prism transmits P light and reflects S light.

[0020] Preferably, the first LCOS chip performs polarization conversion on the second wavelength band light and then outputs the polarization converted light.

[0021] Preferably, the second LCOS chip performs polarization conversion on the light in the first wavelength band and then outputs the polarization converted light.

[0022] Preferably, the third LCOS chip performs polarization conversion on light in the third wavelength band and then outputs the light.

[0023] Preferably, the light combining component is an X-shaped light combining prism.

[0024] Compared with the prior art, the present application has the following beneficial effects: the LCOS projection system of the present application adopts three LCOS chips, fully utilizes the energy of the two beams of S-polarized light and P-polarized light generated by the polarization beam splitter, improves the light energy intensity after projection imaging, and can project a larger area. Compared with the existing three-chip LCOS system, the present system has the advantages of simple structure, small size, high brightness and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] A more complete understanding of exemplary embodiments of the present invention may be obtained by reference to the following drawings.

[0026] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0027] Figure 1 It is a schematic diagram of the structure of a three-chip LCOS projection system provided according to the first embodiment of the present application.

[0028] Reference numerals

[0029] 1-light source assembly, 2-light homogenizing device, 3-first relay mirror, 4-beam splitting element, 5-first LCOS assembly, 6-reflection element, 7-second LCOS assembly, 8-light combining assembly, 9-third LCOS assembly, 10-projection lens;

[0030] 51 - second relay mirror, 52 - first LCOS chip, 53 - first PBS prism, 54 - 1 / 2 wave plate, 55 - third relay mirror;

[0031] 71-the fourth relay mirror, 72-the second LCOS chip, 73-the second PBS prism;

[0032] 91 - the fifth relay mirror, 92 - the third LCOS chip, 93 - the third PBS prism. DETAILED DESCRIPTION

[0033] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0034] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] The utility model provides a three-chip LCOS projection system, which is described below in conjunction with the accompanying drawings.

[0038] Reference Figure 1 The utility model discloses a three-chip LCOS projection system, comprising a light source assembly 1, a light homogenizing device 2, a first relay lens 3, a light splitting element 4, a first LCOS assembly 5, a second LCOS assembly 7, a third LCOS assembly 9, a reflective element 6, a light combining assembly 8 and a projection lens 10.

[0039] Specifically, in this example, the light source assembly 1 is a white light source, and a dispersion element (not shown in the drawings) is provided in the light source assembly 1. The white light emitted by the light source assembly 1 is dispersed into three primary color incident lights (red light, blue light and green light) by the dispersion element inside the light source assembly 1 and enters the light homogenizing device 2. At the same time, the light emitted by the light source assembly 1 is initially a non-linearly polarized light beam containing visible light wavelengths, and then is decomposed into monochromatic linearly polarized light.

[0040] Preferably, in this embodiment, the light source assembly 1 can be an LED light source, and an LED (LED refers to Light Emitting Diode) light source is a light emitting diode light source. This light source has the advantages of small size, long life, high efficiency, etc., and can be used continuously for up to 100,000 hours. In the future, the application of LED light sources in the lighting field will also become the mainstream, and it is also a common light source for projection lighting systems.

[0041] Specifically, the light source assembly 1 emits a first band of light, a second band of light, and a third band of light, wherein the first band of light is red light, the second band of light is green light, the third band of light is blue light, and the red light, the green light, and the blue light are all linearly polarized light. More preferably, in this example, the polarization state of the red light is perpendicular to that of the green light and the blue light, the red light is P polarized light, and the green light and the blue light are S polarized light.

[0042] Specifically, the light homogenizing device 2 is a compound eye or an optical integrator rod, which is used to homogenize the incident light beam.

[0043] In this embodiment, the first LCOS component 5 includes a second relay lens 51, a third relay lens 55, a first PBS prism 53, a first LCOS chip 52, and a 1 / 2 wave plate 54; wherein the first PBS prism 53 transmits P light and reflects S light. The second LCOS component 7 includes a fourth relay lens 71, a second PBS prism 73, and a second LCOS chip 72; the second PBS prism 73 transmits P light and reflects S light. The third LCOS component 9 includes a fifth relay lens 91, a third PBS prism 93, and a third LCOS chip 92; the third PBS prism 93 transmits P light and reflects S light.

[0044] In this embodiment, the light splitting element 4 is a red-green-transmitting and blue-reflecting light splitter; the light combining component 8 is an X-shaped light combining prism.

[0045] In this embodiment, the specific optical path is as follows: the three-color polarized light emitted by the light source assembly 1 enters the light homogenizer 2 for homogenization, the light homogenizer 2 directs the homogenized light beam to the first relay mirror 3, the first relay mirror 3 converges the light beam and directs it to the spectrometer 4, the spectrometer 4 divides the light beam into two paths, the first path is the red light and the green light projected by the spectrometer 4, and the second path is the blue light reflected by the spectrometer 4.

[0046] Among them, the red light and the green light are incident on the first LCOS component 5 after passing through the beam splitter 4. Specifically, the red light and the green light first enter the second relay lens 51, and then enter the first PBS prism 53 after being converged by the second relay lens 51. Since the first PBS prism 53 reflects the S light through the P light, at this time, the green light is reflected by the first PBS prism 53 to the first LCOS chip 52. The first LCOS chip 52 performs polarization conversion on the green light. The green light is converted from S polarized light to P polarized light, and then passes through the first PBS prism 53 again and enters the light combining component 8 (X-type light combining prism); and the red light passes through the first PBS prism 53 and enters the 1 / 2 Wave plate, the polarization state of the red light is converted from P polarized light to S polarized light, and then it is converged by the third relay lens 55 and enters the reflective element 6, and then enters the second LCOS component 7 after being reflected by the reflective element 6. Specifically, the red light enters the fourth relay lens 71 and converges and then enters the second PBS prism 73. Since the second PBS prism 73 reflects S light through P light, the red light enters the second LCOS chip 72 after being reflected by the second PBS prism 73. The second LCOS chip 72 performs polarization conversion on the red light. The red light is converted from S polarized light to P polarized light and then passes through the second PBS prism 73 again, and then enters the light combining component 8 after being transmitted by the second PBS prism 73.

[0047] Among them, the blue light is incident on the third LCOS component 9, specifically, the blue light is incident on the fifth relay lens 91, and is incident on the third PBS prism 93 after being converged. Since the third PBS prism 93 transmits P light and returns S light, the blue light is reflected by the third PBS prism 93 to the third LCOS chip 92. The third LCOS chip 92 converts the polarization of the blue light. The blue light is converted from S polarized light to P polarized light, and is incident on the third PBS prism 93 again, and is transmitted to the light combining component 8 through the third PBS prism 93.

[0048] Finally, the red light, green light and blue light are wavelength combined in the light combining component 8 (X-type light combining prism), and after being combined into white light, they enter the projection lens 10, and the projection lens 10 outputs and projects the combined light beam.

[0049] The LCOS projection system of the present application adopts three LCOS chips, fully utilizing the energy of the two beams of S-polarized light and P-polarized light generated by the polarization beam splitter, improving the light energy intensity after projection imaging, and being able to project a larger area. Compared with the existing three-chip LCOS system, the present system has the advantages of simple structure, small size, high brightness and compact structure.

[0050] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0051] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0052] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A three-chip LCOS projection system, characterized in that: include: A light source assembly, used for outputting light of a first wavelength band, light of a second wavelength band and light of a third wavelength band; A light homogenizing device, used for homogenizing and outputting the first wavelength band light, the second wavelength band light and the third wavelength band light emitted by the light source assembly; A first relay element mirror, used for respectively converging and outputting the first wavelength band light, the second wavelength band light and the third wavelength band light emitted by the light homogenizing device; The light splitting element is used to transmit the incident first-band light and second-band light to emit to the first LCOS component along the first optical path, and reflect the incident third-band light to emit to the third LCOS component along the third optical path; The first LCOS component is used to transmit the light of the first wavelength band to make it emit along the first optical path to the reflection component, and reflect the light of the second wavelength band to make it emit along the second optical path to the light combining component; A reflective element, used for reflecting the first wavelength band light emitted by the first LCOS component to the second LCOS component; The second LCOS component is used to reflect the light of the first wavelength band so that it can be emitted to the light combining component along the first optical path; The third LCOS component is used to reflect the light of the third wavelength band so that it can be emitted to the light combining component along the third optical path; A light combining component, used for combining the first wavelength band light, the second wavelength band light and the third wavelength band light and outputting the combined light to a projection lens; The projection lens is used to output and project the combined light beam.

2. The three-chip LCOS projection system according to claim 1, characterized in that: The first waveband light, the second waveband light and the third waveband light are all linearly polarized light, and the polarization state of the first waveband light is perpendicular to the polarization states of the second waveband light and the third waveband light.

3. The three-chip LCOS projection system according to claim 2, characterized in that: The first LCOS component includes a second relay lens, a third relay lens, a first PBS prism, a first LCOS chip, and a 1 / 2 wave plate; wherein the first PBS prism transmits P light and reflects S light.

4. The three-chip LCOS projection system according to claim 3, characterized in that: The second LCOS component includes a fourth relay lens, a second PBS prism and a second LCOS chip; the second PBS prism transmits P light and reflects S light.

5. The three-chip LCOS projection system according to claim 4, characterized in that: The third LCOS component includes a fifth relay lens, a third PBS prism and a third LCOS chip; the third PBS prism transmits P light and reflects S light.

6. The three-chip LCOS projection system according to claim 3, characterized in that: The first LCOS chip performs polarization conversion on the second wavelength band light and then outputs it.

7. The three-chip LCOS projection system according to claim 4, characterized in that: The second LCOS chip performs polarization conversion on the light in the first wavelength band and then outputs the polarization converted light.

8. The three-chip LCOS projection system according to claim 5, characterized in that: The third LCOS chip performs polarization conversion on the light in the third wavelength band and then outputs the light.

9. The three-chip LCOS projection system according to claim 5, characterized in that: The light combining component is an X-shaped light combining prism.

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