CN211741812U

CN211741812U - DLP projector light source circulation recovery system

Info

Publication number: CN211741812U
Application number: CN202020554665.8U
Authority: CN
Inventors: 卢芳志; 张金南; 林资程
Original assignee: Shaanxi Jishi Photoelectric Technology Co ltd
Current assignee: Shaanxi Jishi Photoelectric Technology Co ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2020-10-23
Anticipated expiration: 2030-04-15

Abstract

The utility model discloses a DLP projecting apparatus light source circulation recovery system, including luminescence unit, light source optics processing system, DMD microlens piece and camera lens, luminescence unit, light source optics processing system, DMD microlens piece and camera lens set gradually in light-emitting path, its characterized in that, DMD microlens piece lower part is provided with first prism piece and second prism piece, the reflection light path of second prism piece is fixed in proper order and is provided with two speculum. The utility model discloses do not reflect the light source that leads to solid leaded light post or hollow internal surface again as the demonstration with the DMD micro-lens and be the optical wand of mirror surface to utilize the characteristic of leaded light post and optical wand, the light source of retrieving is in leaded light post or optical wand the inside and new light source again through the many times refraction back to the light source mix the homogenization and continue to use, gets back to the DMD micro-lens again and reflects the camera lens, and this mode can increase the luminance of light source output camera lens and then increase picture luminance.

Description

DLP projector light source circulation recovery system

Technical Field

The utility model belongs to the technical field of the projection display, especially, relate to a DLP projecting apparatus light source circulation recovery system.

Background

The conventional DLP projector uses a light source including various bulbs, LED light sources and laser light sources, for example, fig. 1 shows a conventional DLP projection light path diagram, in which the light source generates illumination light from a light emitting unit and then goes to a convex lens or a fresnel lens, then generates three primary colors of RGB by using fluorescent powder on a color wheel, and then goes through a concave lens and a DMD micro lens to reflect the light source required by a picture to a lens for adjusting the focal length and outputting the picture.

The DMD micro lens used by DLP projector at present is a micro image display element, which is composed of micro tiltable lens, one lens represents a pixel, the working mode is that the light source projects into the lens and then two inclination angles of the predetermined micro lens are ON and OFF, when ON, the image to be displayed is reflected to the lens, when OFF, the light source can reflect to the light absorption module to absorb the redundant light and can not refract the light source to the lens to influence the display effect, therefore, the light source is output to the DMD micro lens, the display of the image is achieved by the switch of each pixel and the light flux of the gray scale, however, under the OFF state, the light sources are wasted, and the integral brightness of the projector is also influenced. Therefore, increasing the brightness of the projector is a technical problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a DLP projecting apparatus light source circulation recovery system, including luminescence unit, light source optics processing system, DMD micro lens and camera lens, luminescence unit, light source optics processing system, DMD micro lens and camera lens set gradually in light-emitting path, its characterized in that, DMD micro lens lower part is provided with first prism piece and second prism piece, the reflection light path of second prism piece is fixed in proper order and is provided with two speculum.

Further, the light emitting unit comprises various bulbs or LED light sources or laser lamps.

The light source optical processing system comprises a light collecting mirror, a color wheel, a triangular prism, a reflector, a light guide column, a light collecting mirror and a concave-convex mirror which are fixedly arranged along a light outlet light path in sequence.

In a further scheme, the light collecting lens is a convex lens or a Fresnel lens.

The light guide column is of a solid light guide column structure or a light bar structure with a mirror surface on the hollow inner surface.

The further proposal is that the DMD micro lens is composed of a micro tiltable lens, and the tilting angle of the tiltable lens is divided into ON and OFF.

The utility model has the advantages that: the utility model is used for on the DMD micro-lens application of DLP projecting apparatus, do not guide solid leaded light post or hollow internal surface to be the optical wand of mirror surface as the light source of demonstration is re-reflected again to the DMD micro-lens, and utilize the characteristic of leaded light post and optical wand, the light source of retrieving is again after refraction many times the light source mixing homogenization continued to be used in leaded light post or optical wand the inside with new light source, get back to the DMD micro-lens again and reflect the camera lens, this mode can increase the luminance of light source output camera lens and then increase the picture luminance.

Drawings

FIG. 1: a schematic flow diagram of an optical system;

FIG. 2: a prism sheet made of glass or optical grade plastic is used for guiding a light source to the DMD framework schematic diagram;

FIG. 3: an overall architecture light path schematic;

FIG. 4: setting a working ON light path schematic diagram by the DMD micro lens;

FIG. 5: a DMD micro-mirror is set to work OFF light path schematic diagram;

FIG. 6: a schematic light path diagram of a solid light guide column or a hollow micro-mirror surface on the inner surface of the light bar;

FIG. 7: a schematic view of the light path of the reflector and the light guide column;

FIG. 8: a schematic view of a light guide pillar structure;

description of reference numerals: 1 light-emitting unit, 2 light-collecting mirror, 3 color wheel, 4 triangular prism, 5 reflector, 6 light-guiding column, 7 concave lens, 8DMD micro lens, 9 first prism sheet, 10 second prism sheet, 11 lens.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

Example 1

As shown in fig. 1 and fig. 2, the utility model provides a DLP projector light source circulation recovery system, including luminescence unit 1, light source optical processing system, DMD micro-lens 8 and camera lens 11, wherein luminescence unit 1, light source optical processing system, DMD micro-lens 8 and camera lens 11 set gradually in light-emitting path, and DMD micro-lens 8 lower part is provided with first prism piece 9 and second prism piece 10, and the reflection light path of second prism piece 10 is fixed in proper order and is provided with two speculum 5.

The light source used by the light-emitting unit 1 comprises various bulbs, LED light sources and light-emitting sources of laser lamp types, the light source generates illumination light and then enters the optical processing system, the optical processing system can homogenize the light source and generate RGB illumination light, then the illumination light is irradiated to the DMD micro lens 8, the DMD micro lens 8 receives picture signals and processes the picture signals, the inclination angle of each pixel micro lens is controlled through ON and OFF, the light source can be refracted to the lens 11 when ON, the light source can be refracted to the optical processing system again to be recycled and irradiated to the DMD micro lens 8 when OFF, and the light source which is not used originally can be reused in the mode.

As shown in fig. 2, in order to use the prism sheet made of glass or optical grade plastic to guide the light source to the DMD framework, the light emitting unit 1 generates the illuminating light source and then collects the light to the light collecting mirror 2, then the light source generates the three primary colors of RGB through the color wheel 3, then the light source is reflected to the light guiding column 6 through the reflector 5, the illuminating light forms the light source into a uniform light source through multiple refractions in the light guiding column 6 or the light rod, then passes through the light collecting mirror 2 and then passes through the concave lens 7 to the first prism sheet 9, the inner wall surface in the first prism sheet 9 forms total reflection to refract the light source out, and then passes through the DMD micro-mirror 8, as shown in fig. 4 and 5, the DMD micro-mirror 8 receives the picture signal and then determines whether each mirror is ON or OFF, when ON, the DMD micro-mirror 8 refracts the light source light path and enters the first prism and then passes through the second prism sheet to the lens 11 to perform the focal length adjustment and the picture output, when the DMD micro-mirror 8 is turned OFF, the light source which is not used for display passes through the first prism sheet 9 to the second prism sheet 10, and the light source is reflected and refracted by the inner wall of the second prism sheet 10 in a total reflection manner, and then the light source is refracted by the reflector 5, and the light source which is not used for display is refracted to be recycled and returned to the light guide column 6, and the recycled light source and a new light source are refracted again for a plurality of times in the light guide column 6, and the light source is homogenized and continuously used.

As shown in fig. 4, when the DMD micro-mirror 8 receives a signal of ON, the DMD micro-mirror 8 tilts toward the incident light to refract the light source in the direction perpendicular to the Y-axis, and the DMD micro-mirror 8 sets a working OFF optical path as shown in fig. 5, when the DMD micro-mirror 8 receives a signal of OFF, the DMD micro-mirror 8 tilts toward the opposite direction of the incident light to refract the light source in the other direction.

As shown in fig. 6, the illumination light source forms a multiple refraction manner in the light guide column 6 to recycle the light source generated by the new light source and the ineffective light source of DMD micro-lens 8OFF through refraction for uniform utilization, which can increase the utilization rate of the light source.

As shown in fig. 7, the light guide 6 may be introduced in a reflective manner by guiding the light source to the light guide 6 by combining the triangular prism 4 and the reflector 5.

As shown in FIG. 8, the light guide column 6 can be cylindrical, conical, quadrangular, or quadrangular pyramid, and functions to refract the light source inside and homogenize the light source.

Example 2

ON the basis of the embodiment 1, the light path frame is further adjusted, as shown in fig. 3, the light source for illumination generated by the light emitting unit 1 is collected by the light collecting mirror 2, then the light source generates three primary colors of RGB through the color wheel 3, then the light source is reflected to the light guiding column 6 through the reflector 5, the illumination forms the light source into a uniform light source through multiple refractions in the light guiding column 6, then the uniform light source passes through the light collecting mirror 2 and then passes through the concave lens 7 to the DMD micro-mirror 8, as shown in fig. 5 and 6, after receiving the picture signal, the DMD micro-mirror 8 determines whether to process each mirror to be ON or OFF, when ON, the light source light path refracted by the micro-mirror 8 enters the lens 11 in a vertical manner to adjust the focal length and output the picture, when OFF, the DMD micro-mirror 8 inclines to the left, when OFF, the light source which is not used as display passes through the reflector 5 to reflect the light source twice, the light source which is not used as the display is refracted to be recycled and returned to the light guide column 6 again, the recycled light source and the new light source are refracted again for multiple times in the light guide column 6, and the light source is homogenized and continuously used.

It should be emphasized that, in the present embodiment, the light collecting mirror 2 is a convex lens or a fresnel lens, and the light guiding column 6 is a solid light guiding column structure or a light bar structure with a mirror surface on the hollow inner surface.

It should be further emphasized that the determination of whether each mirror is turned ON or OFF after the DMD micro-mirrors 8 receive the frame signal is a common technical means in the art, and is not a necessary technical feature to solve the technical problem of the present application. In the present application, when the inclination angle of the DMD micro-mirror 8 is OFF, the displayed light source passes through the first prism sheet 9 to the second prism sheet 10, and the light source is refracted by total reflection at the inner wall of the second prism sheet 10, and then refracted by the reflector 5, and then refracted to the recycling light source that is not used as the display, and then returned to the light guide column 6 again, the recycled light source can be refracted again with a new light source for multiple times in the light guide column 6 and then used with the light source uniformized, and then the brightness of the light source output to the lens 11 is increased to achieve the purpose of increasing the image brightness.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. The utility model provides a DLP projecting apparatus light source circulation recovery system, includes luminescence unit, light source optical processing system, DMD microlens and camera lens, luminescence unit, light source optical processing system, DMD microlens and camera lens set gradually in light-emitting path, its characterized in that, DMD microlens lower part is provided with first prism piece and second prism piece, the reflection light path of second prism piece is fixed in proper order and is provided with two speculum.

2. The DLP projector light source recycling system according to claim 1, wherein said lighting unit comprises various bulbs or LED light sources or laser lamps.

3. The DLP projector light source recycling system according to claim 1, wherein the light source optical processing system comprises a light collecting mirror, a color wheel, a triangular prism, a reflecting mirror, a light guiding column, a light collecting mirror and a concave-convex mirror which are fixedly arranged along the light emitting path.

4. The DLP projector light source recycling system according to claim 3, wherein said light collecting mirror is a convex lens or a Fresnel lens.

5. The DLP projector light source recycling system according to claim 3, wherein said light guide is a solid light guide structure or a light rod structure with a mirror surface on the hollow inner surface.

6. The DLP projector light source recycling system according to any of claims 1 to 5, wherein the DMD micro-mirror is composed of micro-tiltable mirrors, the tilting angle of the tiltable mirrors is divided into ON and OFF.