Optical machine structure for realizing high-luminous-efficiency and high-color-gamut projection

Abstract

The utility model discloses an optical machine structure for realizing high-luminous-efficiency and high-color-gamut projection, which is characterized by comprising a first light source, a second light source, a third light source, a first collimation assembly, a second collimation assembly, a third collimation assembly, a first black-and-white screen, a second black-and-white screen, a third black-and-white screen, a first fluorescent powder sheet, a second fluorescent powder sheet, a light combination assembly and a projection lens, the first light source, the second light source and the third light source generate light of a first color, the first fluorescent powder sheet is used for converting the light of the first color penetrating through the first fluorescent powder sheet into light of a second color, and the second fluorescent powder sheet is used for converting the light of the first color penetrating through the second fluorescent powder sheet into light of a third color; the light combining assembly is used for combining the light of the first color, the light of the second color and the light of the third color so as to project the light to the projection lens.

Description

Technical Field

[0001] The utility model relates to the field of LCD projection optical machines, and in particular to an optical machine structure for realizing high-light-efficiency and high-color-gamut projection. Background Art

[0002] Existing three-panel LCD projectors generally utilize two approaches. The first utilizes white light as the light source, splitting it into three monochromatic beams (R / G / B) to illuminate the three LCD panels. The three images are then combined to form a single color image. The LED light source produces white light because the chip emits blue light, which excites phosphors on the light source's surface (red and green phosphors, respectively, convert blue light into red and green). During this process, if only the red, green, and blue light paths are considered, the configuration of the other two colors (phosphors) will have a certain impact on the overall light efficiency. Furthermore, the design of the light source, rear mirror, and thermal glass must consider the entire bandwidth, resulting in a further loss of overall light efficiency.

[0003] The second approach uses three different color light sources (R / G / B) to illuminate each of the three LCDs, then combines the three images into a single color image. This second approach, considering the transmittance / reflectance of all wavelengths within the visible light bandwidth, allows for common optical components from the light source to the screen, but this results in lower optical efficiency. Alternatively, different red, green, and blue light sources can be used, with all optical components from the light source to the screen designed to match the wavelengths. This approach offers higher optical efficiency, but the materials involved are complex, making assembly difficult, costly, and inefficient. Therefore, an optomechanical structure is needed to achieve high-efficiency, high-color-gamut projection. Utility Model Content

[0004] The main purpose of this application is to provide an optical-mechanical structure that achieves high-light-efficiency and high-color-gamut projection, aiming to solve the problems mentioned in the background technology.

[0005] The present application provides an optical-mechanical structure for achieving high-light-efficiency and high-color-gamut projection, comprising a first light source, a second light source, a third light source, a first collimating assembly, a second collimating assembly, a third collimating assembly, a first black-and-white screen, a second black-and-white screen, a third black-and-white screen, a first phosphor sheet, a second phosphor sheet, a light-combining assembly, and a projection lens. The first light source, the second light source, and the third light source generate light of a first color. The first collimating assembly is used to collimate the light generated by the first light source. The second collimating assembly is used to collimate the light generated by the second light source. The third collimating assembly is used to collimate the light generated by the third light source. The first phosphor sheet is used to convert light of the first color passing through the first phosphor sheet into light of the second color. The second phosphor sheet is used to convert light of the first color passing through the second phosphor sheet into light of the third color.

[0006] The light combining component is used to combine the light of the first color, the light of the second color and the light of the third color to project them toward the projection lens. The light generated by the first light source passes through the first collimating component, the first black and white screen and the light combining component in sequence. The light generated by the second light source is collimated by the second collimating component and then passes through the second black and white screen, the first phosphor sheet and the light combining component. The light generated by the third light source is collimated by the third collimating component and then passes through the third black and white screen, the second phosphor sheet and the light combining component.

[0007] Furthermore, the light combining assembly includes a first dichroic mirror and a second dichroic mirror, the first dichroic mirror is used to transmit the light of the first color and the light of the second color and reflect the light of the third color, the second dichroic mirror is used to transmit the light of the first color and the light of the third color and reflect the light of the second color, the light path of the first light source is transmitted through the first dichroic mirror and the second dichroic mirror and then projected onto the projection lens, the light path of the second light source is transmitted through the first dichroic mirror and is reflected by the second dichroic mirror and then projected onto the projection lens, and the light path of the third light source is transmitted through the second dichroic mirror and is reflected by the first dichroic mirror and then projected onto the projection lens.

[0008] Furthermore, the first dichroic mirror and the second dichroic mirror are arranged perpendicular to each other, the incident angle of the light path of the first light source with the first dichroic mirror and the incident angle of the light path of the first light source with the second dichroic mirror are both 45 degrees, the incident angle of the light path of the second light source with the first dichroic mirror is 135 degrees, the incident angle of the light path of the second light source with the second dichroic mirror is 45 degrees, the incident angle of the light path of the second light source with the first dichroic mirror is 45 degrees, and the incident angle of the light path of the second light source with the second dichroic mirror is 135 degrees.

[0009] Furthermore, the first light source, the second light source and the third light source are all blue light sources, the first phosphor sheet is a blue-excited red phosphor sheet, and the second phosphor sheet is a blue-excited green phosphor sheet.

[0010] Furthermore, the light combining component is a light combining prism, and the first light source, the second light source and the third light source are respectively arranged on three adjacent side surfaces, wherein the second light source and the third light source are arranged opposite to each other.

[0011] Furthermore, the first phosphor sheet is attached to one side surface of the second black and white screen.

[0012] Furthermore, the second phosphor sheet is attached to one side surface of the third black and white screen.

[0013] Furthermore, it also includes a first insulating glass, a second insulating glass, a third insulating glass, a first front mirror, a second front mirror, a third front mirror, a first rear mirror, a second rear mirror and a third rear mirror. The light generated by the first light source passes through the first collimating assembly, the first rear mirror, the first insulating glass, the first black and white screen and the first front mirror in sequence. The light generated by the second light source passes through the second collimating assembly, the second rear mirror, the second insulating glass, the second black and white screen and the second front mirror in sequence. The light generated by the third light source passes through the third collimating assembly, the third rear mirror, the third insulating glass, the third black and white screen and the third front mirror in sequence.

[0014] Furthermore, the first phosphor sheet is attached to the side of the second heat-insulating glass close to the second black and white screen.

[0015] Furthermore, the second phosphor sheet is attached to the side of the third heat-insulating glass close to the third black and white screen.

[0016] The utility model sets a phosphor sheet and a light combining component, and sets three light sources to convert three single-color lights into three different-color lights, which are then combined and projected through the light combining component, thereby improving the utilization rate of light efficiency, and the components are adaptable and easy to assemble; the three light sources are all light sources of the same color, and after the light sources are emitted, they are collimated and incident on the black and white screen, of which the illumination light of two light sources is converted into light of other colors after passing through the phosphor sheet, and the three-color light is then combined into one light through the light combining component, and the combined light is projected through the projection lens to form an image on the projection screen or wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a structural diagram of an optical-mechanical structure for achieving high-light-efficiency and high-color-gamut projection according to an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 A partial enlarged view of an embodiment.

[0021] Figure 3 It is a structural schematic diagram of an optical-mechanical structure for achieving high-light-efficiency and high-color-gamut projection according to another embodiment of the present invention.

[0022] The purpose, features and advantages of this application will be further explained with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0023] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] See also Figure 1-2 The present application provides an optical-mechanical structure 100 for achieving high-light-efficiency and high-color-gamut projection, including a first light source 11, a second light source 12, a third light source 13, a first collimating component 21, a second collimating component 22, a third collimating component 23, a first black-and-white screen 31, a second black-and-white screen 32, a third black-and-white screen 33, a first phosphor sheet 41, a second phosphor sheet 42, a light combining component and a projection lens 60, wherein the first light source 11, the second light source 12 and the third light source 13 generate light of a first color, the first collimating component 21 is used to collimate the light generated by the first light source 11, the second collimating component 22 is used to collimate the light generated by the second light source 12, and the third collimating component 23 is used to collimate the light generated by the third light source 13, the first phosphor sheet 41 is used to convert the light of the first color passing through the first phosphor sheet 41 into light of a second color, and the second phosphor sheet 42 is used to convert the light of the first color passing through the second phosphor sheet 42 into light of a third color.

[0025] The light combining component is used to combine the light of the first color, the light of the second color and the light of the third color to project them toward the projection lens 60. The light generated by the first light source 11 passes through the first collimating component 21, the first black and white screen 31 and the light combining component in sequence. The light generated by the second light source 12 is collimated by the second collimating component 22 and then passes through the second black and white screen 32, the first phosphor sheet 41 and the light combining component. The light generated by the third light source 13 is collimated by the third collimating component 23 and then passes through the third black and white screen 33, the second phosphor sheet 42 and the light combining component.

[0026] The utility model sets a phosphor sheet and a light combining component, and sets three light sources to convert three single-color lights into three different-color lights, which are then combined and projected through the light combining component, thereby improving the utilization rate of light efficiency, and the components are adaptable and easy to assemble; the three light sources are all light sources of the same color, and after the light sources are emitted, they are collimated and incident on the black and white screen, among which the illumination light of two light sources is converted into light of other colors after passing through the phosphor sheet, and the three-color light is then combined into one light through the light combining component, and the combined light is projected through the projection lens 60 to form an image on the projection screen or wall.

[0027] In one embodiment of the present invention, the light source may be any one of a COB light source, a packaged light source, and a laser light source.

[0028] like Figure 3 As shown, in one embodiment of the present invention, the collimating component can be an optical hopper, or an aspheric collimating light-homogenizing lens, or two spherical lenses, or a mixture of a spherical lens and an aspheric lens.

[0029] like Figure 1 As shown, in one embodiment of the present invention, the light combining component includes a first dichroic mirror 51 and a second dichroic mirror 52, the first dichroic mirror 51 is used to transmit the light of the first color and the light of the second color and reflect the light of the third color, the second dichroic mirror 52 is used to transmit the light of the first color and the light of the third color and reflect the light of the second color, the light path of the first light source 11 is transmitted through the first dichroic mirror 51 and the second dichroic mirror 52 and then projected onto the projection lens 60, the light path of the second light source 12 is transmitted through the first dichroic mirror 51 and is reflected by the second dichroic mirror 52 and then projected onto the projection lens 60, the light path of the third light source 13 is transmitted through the second dichroic mirror 52 and is reflected by the first dichroic mirror 51 and then projected onto the projection lens 60.

[0030] In one embodiment of the present invention, the first dichroic mirror 51 and the second dichroic mirror 52 are arranged perpendicular to each other, and the incident angles of the light path of the first light source 11 and the first dichroic mirror 51 and the light path of the first light source 11 and the second dichroic mirror 52 are both 45 degrees, the incident angles of the light path of the second light source 12 and the first dichroic mirror 51 are 135 degrees, and the incident angles of the light path of the second light source 12 and the second dichroic mirror 52 are 45 degrees. The incident angles of the light path of the second light source 12 and the first dichroic mirror 51 are 45 degrees, and the incident angles of the light path of the second light source 12 and the second dichroic mirror 52 are 135 degrees.

[0031] In one embodiment of the present invention, the first light source 11 , the second light source 12 and the third light source 13 are all blue light sources, the first phosphor sheet 41 is a blue-excited red phosphor sheet, and the second phosphor sheet 42 is a blue-excited green phosphor sheet.

[0032] In one embodiment of the present invention, the first phosphor sheet 41 is attached to one side surface of the second black-and-white screen 32 .

[0033] In one embodiment of the present invention, the second phosphor sheet 42 is attached to one side surface of the third black-and-white screen 33 .

[0034] In one embodiment of the present invention, the optical-mechanical structure 100 further includes a first insulating glass 81, a second insulating glass, a third insulating glass, a first front mirror 91, a second front mirror, a third front mirror, a first rear mirror 71, a second rear mirror, and a third rear mirror. Light generated by the first light source 11 sequentially passes through the first collimator assembly 21, the first rear mirror 71, the first insulating glass 81, the first black-and-white screen 31, and the first front mirror 91. Light generated by the second light source 12 sequentially passes through the second collimator assembly 22, the second rear mirror, the second insulating glass, the second black-and-white screen 32, and the second front mirror. Light generated by the third light source 13 sequentially passes through the third collimator assembly 23, the third rear mirror, the third insulating glass, the third black-and-white screen 33, and the third front mirror. Optical components in front of the screen do not need to be adapted for red and green wavelengths, significantly improving light efficiency. Furthermore, commonality is possible from the light source to the insulating glass, facilitating material organization and assembly, significantly improving light efficiency. Furthermore, the influence of various components between the light source and the screen on color is avoided, allowing for a wider color gamut.

[0035] like Figure 3 As shown, in one embodiment of the present invention, the light combining component is a light combining prism, and the first light source 11, the second light source 12 and the third light source 13 are respectively arranged on three adjacent sides, wherein the second light source 12 and the third light source 13 are arranged opposite to each other.

[0036] In one embodiment of the present invention, the first phosphor sheet is attached to the side of the second insulating glass close to the second black and white screen; the second phosphor sheet is attached to the side of the third insulating glass close to the third black and white screen.

[0037] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent processing scope of the present application.

Claims

1. An optomechanical structure for achieving high light efficiency and high color gamut projection, characterized in that: The projector comprises a first light source, a second light source, a third light source, a first collimating assembly, a second collimating assembly, a third collimating assembly, a first black-and-white screen, a second black-and-white screen, a third black-and-white screen, a first phosphor sheet, a second phosphor sheet, a light combining assembly, and a projection lens. The first light source, the second light source, and the third light source generate light of a first color. The first collimating assembly is used to collimate the light generated by the first light source. The second collimating assembly is used to collimate the light generated by the second light source. The third collimating assembly is used to collimate the light generated by the third light source. The first phosphor sheet is used to convert the light of the first color passing through the first phosphor sheet into light of a second color. The second phosphor sheet is used to convert the light of the first color passing through the second phosphor sheet into light of a third color. The light combining component is used to combine the light of the first color, the light of the second color and the light of the third color to project them toward the projection lens. The light generated by the first light source passes through the first collimating component, the first black and white screen and the light combining component in sequence. The light generated by the second light source is collimated by the second collimating component and then passes through the second black and white screen, the first phosphor sheet and the light combining component. The light generated by the third light source is collimated by the third collimating component and then passes through the third black and white screen, the second phosphor sheet and the light combining component.

2. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 1, characterized in that: The light combining assembly includes a first dichroic mirror and a second dichroic mirror, the first dichroic mirror is used to transmit the light of the first color and the light of the second color and reflect the light of the third color, the second dichroic mirror is used to transmit the light of the first color and the light of the third color and reflect the light of the second color, the light path of the first light source is transmitted through the first dichroic mirror and the second dichroic mirror and then projected onto the projection lens, the light path of the second light source is transmitted through the first dichroic mirror and is reflected by the second dichroic mirror and then projected onto the projection lens, and the light path of the third light source is transmitted through the second dichroic mirror and is reflected by the first dichroic mirror and then projected onto the projection lens.

3. The optical-mechanical structure for achieving high-light-efficiency and high-color-gamut projection according to claim 2, characterized in that: The first dichroic mirror and the second dichroic mirror are arranged perpendicular to each other, the incident angle of the light path of the first light source to the first dichroic mirror and the incident angle of the light path of the first light source to the second dichroic mirror are both 45 degrees, the incident angle of the light path of the second light source to the first dichroic mirror is 135 degrees, the incident angle of the light path of the second light source to the second dichroic mirror is 45 degrees, the incident angle of the light path of the second light source to the first dichroic mirror is 45 degrees, and the incident angle of the light path of the second light source to the second dichroic mirror is 135 degrees.

4. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 1, characterized in that: The first light source, the second light source, and the third light source are all blue light sources. The first phosphor sheet is a blue-excited red phosphor sheet, and the second phosphor sheet is a blue-excited green phosphor sheet.

5. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 1, characterized in that: The light combining component is a light combining prism, and the first light source, the second light source and the third light source are respectively arranged on three adjacent side surfaces, wherein the second light source and the third light source are arranged opposite to each other.

6. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 1, characterized in that: The first phosphor sheet is attached to one side surface of the second black and white screen.

7. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 1, characterized in that: The second phosphor sheet is attached to one side surface of the third black and white screen.

8. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 1, characterized in that: It also includes a first insulating glass, a second insulating glass, a third insulating glass, a first front mirror, a second front mirror, a third front mirror, a first rear mirror, a second rear mirror and a third rear mirror. The light generated by the first light source passes through the first collimating assembly, the first rear mirror, the first insulating glass, the first black and white screen and the first front mirror in sequence. The light generated by the second light source passes through the second collimating assembly, the second rear mirror, the second insulating glass, the second black and white screen and the second front mirror in sequence. The light generated by the third light source passes through the third collimating assembly, the third rear mirror, the third insulating glass, the third black and white screen and the third front mirror in sequence.

9. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 8, characterized in that: The first phosphor sheet is attached to the side of the second heat-insulating glass close to the second black and white screen.

10. The optical-mechanical structure for achieving high light efficiency and high color gamut projection according to claim 8, characterized in that: The second phosphor sheet is attached to the side of the third heat-insulating glass close to the third black-and-white screen.

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