TWI688817B - Project light source of module - Google Patents

Abstract

The invention is a projection light source module. Its using a reflecting component reflect a light source, and reflecting a plurality of light beams through a first reflex curved surface and a second reflex curved surface of said reflective element, and said a plurality of light beams reflected through said first reflective curved surface and said second reflective curved surface to form a plurality of reflective curved surfaces, said plurality of reflective curved surface is located in an extended surface of a light exiting port, and said light collecting element is used to collect the reflected light into a collimated light beam.

Description

Projection light source device

The invention relates to a device, especially a projection light source device.

A digital projector is a device that can be connected to computers, VCDs, DVDs, BDs, game consoles, or DV and other devices through different interfaces to play corresponding video signals. Digital projectors can play static images or dynamic movies. Some projectors also have the function of outputting sound. Such devices are widely used in homes, offices, schools, and small entertainment venues. Depending on how they are used, the projectors have LCD, Different types such as LCOS, DLP, DMD, etc.

The early digital projectors were "three-gun projectors", which had three lenses that projected three primary colors of red, green, and blue respectively, and the image was formed by mixing the shades of the three colors. The working principle is similar to that of CRT screens and plasma TVs. However, due to its bulky size, low brightness, complicated cable configuration, inconvenient focusing, large power consumption and cumbersome operating procedures, it gradually faded out of the mainstream market, and the three-gun projector itself must also be installed in a place with enough space, Such as karaoke boxes, conference rooms, theaters, airliners, cruise ships and other public places.

Because the three-gun projector has the problems of large volume and difficult to carry, etc., in order to solve the shortcomings of the three-gun projector, the "single-shot projector" was developed. It only needs one lens to completely display the image and is convenient to carry. Because of its small size, it can be hung from the ceiling and placed. The principle of the single-shot projector uses digital development methods such as LCD and DLP. In addition, the single-shot projection One of the reasons why the machine is better than the three-gun projector is because the single-gun projector can be connected to the VGA terminal, S terminal and HDMI terminal, so that it can be connected to the notebook computer, which is convenient for presenting the data and image in the notebook computer. . However, single-shot projectors are more prone to overheating problems than three-shot projectors due to the use of a single lens and light bulb. It takes some time to cool down or warm up the machine.

As can be seen from the above, single-shot projectors can be divided into LCD projectors and DLP projectors. Among them, LCD projectors use three liquid crystal panels as imaging elements for the three primary colors of red, green, and blue. There is an imaging unit corresponding to the pixel points of the screen image. When the light from the light source passes through the color separation unit to form monochromatic light and reaches the corresponding liquid crystal panel, the three liquid crystal panels control the light passing through according to the color of the pixel point. After being projected onto the screen through the condensing unit, the light from the three liquid crystal panels converges to generate one pixel point. Simply put, the LCD projector uses a projection light source to present the image.

Regardless of whether it is an LCD projector or a DLP projector, there will be a problem of light source gathering. In general, a Fresnel lens will be placed on the front side of the light source. With a single-stage focusing reflector, After the light source reflects the light source through the reflective cup, it penetrates the Fresnel lens to form a collimated light source. However, since the use of the Fresnel lens to project light will reduce the imaging quality, the imaging quality of the projector will be limited.

In addition, the light sources used in traditional LCD projectors need to use a variety of reflection mirrors, beam splitters and a variety of lenses to perform the function of beam splitting and refraction, so that the interior of the projector needs to leave space for the light path so that the light can pass through the beam splitter Through the spotlight, the DLP projector does not need to reserve too many light transmission paths in the space, but because the light needs to be collected before being projected, the height of the reflector placed on the front side of the projector light source is also high. The height of the reflector makes the volume of the DLP projector limited.

Therefore, in order to improve the imaging quality of the projector and reduce the size of the projector body itself, the present invention improves a new condensing hood, through which the size of the projector machine can be further reduced to achieve a small short-throw projection Machine purpose.

Based on the above, it can be seen that the present invention provides a projection light source device, which is provided in front of the light source with a multi-segment focus condenser, a device for generating a collimated light source with a convex lens or an aspheric lens.

An object of the present invention is to provide a projection light source device, which is provided with a multi-segment focal condenser, the multi-segment focal condenser has multiple reflective surfaces, and a light source is reflected through the multi-segment focal condenser to reflect the beam angle Converge to 30°, and then use the convex lens lifting structure to change the beam angle to 10° to produce a collimated light source.

For the above purpose, the present invention provides a light emitting element; and a reflecting element, which includes a central axis, a first reflecting surface and a second reflecting surface, the second reflecting mask has a light outlet, the first reflecting The light-emitting element is looped around one side of the surface, the other side of the first reflective surface is connected to the second reflective surface, a first tangent to the center of the first reflective surface and a second tangent to the center of the second reflective surface Forming a first angle and a second angle with a horizontal line of the light-emitting element, and the second angle is greater than the first angle, the central axis connects the center point of the light outlet and the center point of the light-emitting element; wherein, The first reflective surface and the second reflective surface reflect a plurality of light rays emitted by the light-emitting element to form a plurality of reflected light rays, the reflected light rays pass through the light exit port, and the reflected light rays are located in the light exit One of the mouths extends into the plane.

The present invention provides an embodiment, wherein the reflective element is a funnel body with a square, rectangular, circular, elliptical or asymmetric geometric shape at the bottom, and the first reflective surface and the second reflective surface Adjacent reflection planes or adjacent reflection surfaces are asymmetrical.

The invention provides an embodiment, wherein the light-emitting element is an LED or a light bulb.

The invention provides an embodiment, which further includes: a lifting mechanism having a first tube body, a second tube body and a stopper, the first tube body has a first opening, the first tube body The second tube body is sleeved, and the stopper is disposed on one side of the first tube body, which is located at the first opening.

The present invention provides an embodiment, which further includes: a light-condensing element, which is provided with a second opening of the second tube body, wherein the reflected rays penetrate the light-condensing element to form a collimated light, And the light-emitting angle of the collimated light is less than 10°.

The present invention provides an embodiment, which further includes a heat dissipation structure, which is disposed below the light emitting element.

The present invention provides an embodiment, wherein the material of the heat dissipation structure is selected from one of aluminum, iron, and copper or any one of the foregoing.

The present invention provides an embodiment, wherein the light-emitting angles of the reflected rays are below 35°.

The present invention provides an embodiment, wherein the light-concentrating element is selected from one of a convex lens and an aspheric lens or any one of the foregoing.

The present invention provides an embodiment, wherein the material of the reflective element is selected from one of acrylic, aluminum, and glass or any one of the foregoing.

10: Light emitting element

11: Horizontal line

13: Light

20: Reflective element

21: The first reflecting surface

211: First tangent

22: Extension surface

23: Second reflective surface

231: Second tangent

25: Light exit

27: Central axis

29: reflected light

30: Lifting mechanism

31: The first cylinder

311: the first opening

33: Second cylinder

35: Stopper

37: Fastener

40: Concentrating element

41: Collimated light

50: heat dissipation structure

θ ₁ : first angle

θ ₂ : second angle

θ ₃ : third angle

Figure 1A: It is a schematic top view of the projection light source device of the present invention; Figure 1B: It is a schematic cross-sectional view of the projection light source device of the present invention; Figure 2A: It is a partially enlarged schematic view of the projection light source device of the present invention; Figure 2B: It is a partially enlarged schematic view of the projection light source device of the present invention; Figure 3: It is a schematic view of reflected light of the projection light source device of the present invention; Figure 4: It is a schematic view of reflected light of the projection light source device of the present invention ; And Figure 5: It is a schematic diagram of the reflection structure of the projection device of the present invention.

In order for your reviewing committee to have a better understanding and understanding of the features of the present invention and the achieved effects, the preferred embodiments and detailed descriptions are accompanied by the following description: In the following, the drawings will be used to explain this Various embodiments of the invention describe the invention in detail. However, the concept of the present invention may be embodied in many different forms, and should not be interpreted as being limited to the exemplary embodiments set forth herein.

The advantage of the present invention is that the light of the present invention can be transmitted through a multi-segment focal reflection light source, so that the light source forms a collimated light source. However, in general, a Fresnel lens is placed on the front side of the light source in conjunction with a single-stage focusing reflector to make the light source After reflecting the light source through the reflector cup, penetrating the Fresnel lens to form a collimated light source, but since the use of the Fresnel lens to project light will reduce the imaging quality, the imaging quality of the projector will be limited and the light needs to be concentrated After the projection, the height of the reflector placed on the front side of the projector light source is relatively high. Due to the height of the reflector, the volume of the DLP projector has certain limits.

The projection light source device of the present invention is provided with a multi-segment focal condenser, the multi-segment focal condenser has multiple reflective surfaces, and a light source reflects through the multi-segment focal condenser to reflect the beam angle After polymerization, the lens and the lifting structure are combined to convert the beam angle into a collimated light source, which can be used in the projector to reduce the volume of the projector and realize the concept of a miniature projection device.

First, please refer to FIG. 1A, which is a schematic top view of the projection light source device of the present invention, and FIG. 1B, which is a schematic cross-sectional view of the projection light source device of the present invention. As shown in the figure, it includes a light-emitting element 10, A reflective element 20, a lifting mechanism 30, a condensing element 40 and a heat dissipation structure 50.

It can be clearly revealed from the schematic cross-sectional view of FIG. 1B that the projection light source device of the present invention has the light-emitting element 10 and the reflective element 20. The reflective element 20 has a central axis 27, a first reflective surface 21, and the second reflection Surface 23, one side of the first reflective surface 21 is looped around the light-emitting element 10, the other side is connected to the second reflective surface 23, the second reflective surface 23 has a light outlet 25, the central axis 27 is connected to the The center point of the light outlet 25 and the center point of the light emitting element 10, the reflective element 20 in this embodiment may be a combination of a reflective curved surface or a reflective plane.

Among them, please refer to FIGS. 2A and 2B, which are partially enlarged schematic diagrams of the projection light source device of the present invention. As shown in the figure, a first tangent 211 at the center of the first reflective surface 21 and the second reflective surface A second tangent 231 at the center of 23 forms a first angle θ1 and a second angle θ2 with a horizontal line 11 of the light emitting element 10, and the second angle θ2 is greater than the first angle θ1.

Continuing the above, please refer to FIG. 3, which is a schematic diagram of reflected light of the projection light source device of the present invention. As shown in the figure, when a plurality of light rays 13 of the light emitting element 10 are projected on the first reflective surface 21 and the second After the reflecting surface 23, the first reflecting surface 21 and the second reflecting surface 23 reflect the light sources 13 to form a plurality of reflected light rays 29. Since the first reflecting surface 21 and the second reflecting surface 23 have many The focal curvature, therefore, when reflecting the reflected rays 29, the reflected rays 29 will be emitted along the central axis 27 at a beam angle of a third angle θ3, where the beam angle refers to On a plane perpendicular to the centerline of the beam, the light intensity is equal to 50% of the maximum light intensity between the two directions Angle, the beam angle of the reflected light 29 is 2xθ3, which is a beam angle below 35°, and the reflected light 29 are located inside an extension surface 22 of the light exit 27 of the reflective element 20.

The present invention may further include the lifting mechanism 30 and the light-concentrating element 40. Please refer to FIG. 4, which is a schematic diagram of the reflected light of the projection light source device of the present invention. As shown in the figure, the reflected light 29 can also pass through The condensing element 40 makes the reflected light 29 form a collimated light 41, and the beam angle of the collimated light 41 is less than 10°.

Moreover, since the light-emitting element 10 can be an LED or a light bulb, whether the LED or the light bulb is used, the temperature of the light-emitting element 10 will be increased. Therefore, in order to avoid the light-emitting element 10 due to excessive temperature, the service life is reduced, resulting in The maintenance is troublesome. Therefore, the present invention can further include the heat dissipation structure 50, so that the light emitting element 10 can reduce the temperature through the heat dissipation structure 50, so as to increase the service life of the light emitting element 10.

In addition, the present invention further includes a lifting mechanism 30. When the reflective element 20 forms the reflected rays 29 and penetrates the condensing element 40 to form the collimated light 41, the condensing element 40 can be disposed in the lifting structure On 30, the fine adjustment of the collimated light 41 is performed through the lifting function.

Please refer to FIG. 1B. As shown in the figure, the lifting structure 30 further includes a first tube 31, a second tube 33 and a stopper 35. The first tube 31 has a first opening 311, the first tube 31 is sleeved with the second tube 33, the stopper 35 is disposed on one side of the first tube 31, it is located at the first opening 311, and the condensing element 40 is One side of the second tube body 33 is provided, and after adjusting the height of the lifting structure 30 by rotating to adjust the appropriate height, a fixing member 37 can be used to fix the height of the lifting structure 30, wherein the fixing member 37 is screwed To fix.

The reflective element 20 of the present invention can be round, square, rectangular, or elliptical. A preferred embodiment of the present invention is round, but not limited to this. In addition, referring to FIG. 5, which is the present invention A schematic diagram of the reflective structure of the projection device. In this embodiment, the reflective element 20 may be a combination of a reflective curved surface or a reflective plane. At least one of the first reflective surface 21 and the second reflective surface 23 is asymmetric.

In addition, in the selection and use of the condensing element 40, a convex lens or an aspheric lens can be used. The convex lens or aspheric lens is used because the improved multi-focal curvature reflective element 20 of the present invention only needs to reflect light The collimated light 41 can be generated through the general convex lens or aspheric lens, without using the Fresnel lens used conventionally, which can reduce the production cost, and does not need to be the same as the traditional projector. The follow-up optical path design is being carried out on the light focusing lens.

The above-mentioned embodiment, the method of the present invention, which produces a projection light source device, in order to improve the imaging quality of the projector and reduce the size of the projector body itself, the present invention improves a new condenser, which is provided in front of the light source It has a multi-segment focus condenser and a convex lens or aspheric lens to produce a collimated light source. Through this condenser, the projector can be further reduced in size, and the purpose of achieving a small short-focus projector can be achieved.

However, the above are only the preferred embodiments of the present invention and are not intended to limit the scope of the implementation of the present invention. Any changes and modifications based on the shape, structure, features and spirit described in the patent application scope of the present invention , Should be included in the scope of the patent application of the present invention.

10: Light emitting element

20: Reflective element

21: The first reflecting surface

23: Second reflective surface

25: Light exit

27: Central axis

30: Lifting mechanism

31: The first cylinder

311: the first opening

33: Second cylinder

35: Stopper

37: Fastener

40: Concentrating element

50: heat dissipation structure

Claims (11)

A projection light source device, its structure includes: a light emitting element; and a reflective element, which includes a central axis, a first reflective surface and a second reflective surface, the second reflective mask has a light outlet, the first The light-emitting element is looped on one side of the reflection surface, the other side of the first reflection surface is connected to the second reflection surface, a first tangent to the center of the first reflection surface and a second to the center of the second reflection surface The tangent line forms a first angle and a second angle with a horizontal line of the light emitting element, and the second angle is greater than the first angle, and the central axis connects the center point of the light outlet and the center point of the light emitting element; , The first reflective surface and the second reflective surface reflect a plurality of light rays emitted by the light-emitting element to form a plurality of reflected light rays, the reflected light rays pass through the light outlet, and the reflected light rays are located at the One of the light outlets extends into the plane. The projection light source device according to claim 1, wherein the reflective element is a funnel body with a tapered bottom in a square, rectangular, circular, elliptical or asymmetric geometric shape. The projection light source device according to claim 1, wherein at least one of the first reflective surface and the second reflective surface is an asymmetric surface. The projection light source device according to claim 1, wherein the light emitting element is an LED or a light bulb. The projection light source device according to claim 1, further comprising: a lifting mechanism having a first tube body, a second tube body and a stopper, the first tube body having a first opening, the The first tube body is sleeved with the second tube body, and the stopper is disposed on one side of the first tube body, which is located at the first opening. The projection light source device according to claim 5, further comprising: A condensing element is disposed on one side of the second tube body, wherein the reflected light penetrates the condensing element to form a collimated light, and the beam angle of the collimated light is less than 10° . The projection light source device according to claim 1, further comprising a heat dissipation structure, which is disposed below the light emitting element. The projection light source device according to claim 7, wherein the material of the heat dissipation structure is selected from one of aluminum, iron, and copper, or any one of the foregoing. The projection light source device as described in claim 1, wherein the light emitting angles of the reflected rays are 35° or less. The projection light source device according to claim 6, wherein the light collecting element is selected from one of a convex lens and an aspheric lens or any one of the foregoing. The projection light source device according to claim 1, wherein the material of the reflective element is selected from one of acrylic, aluminum, and glass or any one of the foregoing.

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