TWI749052B - Light combining module - Google Patents

Abstract

A light combining module includes a first light source, a second light source, a first dichroic mirror, and a first alignment structure. The first light source is used to output a first light. The second light source is used to output a second light. The first dichromatic mirror is disposed on a transmission path of the first light and the second light, wherein the first light is incident on the second light source via the first dichroic mirror. The first alignment structure adjusts the position of the second light source.

Description

Heguang Module

The present invention relates to a light combining module, and in particular to a light combining module with an adjusting mechanism.

In conventional projection modules, most of them use red light-emitting diodes, blue light-emitting diodes, and green light-emitting diodes to generate a projected light. The brightness of the image projected by the projection module will depend on the brightness of the light output by the light source module. Therefore, how to further effectively excite the green light emitting diode has become one of the urgent problems in this field.

The embodiment of the present invention provides a light combining module that uses an adjustment mechanism to adjust the position of the light source, the position of the beam splitter, or the position of the collimating lens, so as to improve the brightness performance of the light combining module, and has higher brightness and applications The image quality on the projector.

The light combining module according to an embodiment of the present invention includes a first light source, a second light source, a first beam splitter, and a first adjustment structure. The first light source is used for outputting the first light. First The two light sources are used for outputting the second light. The first beam splitter is arranged on the transmission path of the first light and the second light, wherein the first light is incident to the second light source through the first beam splitter. The first adjustment structure adjusts the position of the second light source.

In an embodiment of the present invention, the light combining module includes a first light source module, a second light source module, a third light source module, a fourth light source module, a first beam splitter, a second beam splitter, and a first adjustment mechanism. The first light source module is used for outputting the first blue light. The second light source module is used for outputting green light. The third light source module is used for outputting the second blue light. The fourth light source module is used for outputting red light. The first beam splitter is arranged on the transmission path of the first blue light, the second blue light and the green light, wherein the first blue light enters the second light source module through the first beam splitter. The second beam splitter is arranged on the transmission path of the red light, the second blue light and the green light. The first adjustment mechanism is used for changing the position where the first blue light is incident on the second light source module.

Based on the above, since the light combining module of the embodiment of the present invention is provided with an adjustment mechanism, the design of the adjustment mechanism can be used to adjust the position of the light source, the position of the beam splitter, or the position of the collimating lens, so as to change the incidence of light into the light source module. , To achieve better excitation efficiency. In short, the light combining module of the embodiment of the present invention can have higher brightness performance and image quality when applied to a projector.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

10: Heguang Module

120, 140, 160, 180: light source module

122: red light

142: Blue Light

162: Green light

182: blue light

220, 240: Spectroscope

320, 340, 360, 380, 390: collimating lens

520, 540, 560: adjustment mechanism

522: The first elastic part

524: The second elastic part

526: Locking Mechanism

242, 362: limit parts

244, 364: Fasteners

620: radiator

640: upper cover

640a: top surface

642, 644: Limit slot

660: Base

660a: bottom surface

662, 664: Chute

X: first direction

Y: second direction

FIG. 1 is a schematic diagram of a light combining module according to an embodiment of the present invention.

FIG. 2A is a schematic diagram of an adjustment mechanism according to an embodiment of the present invention.

FIG. 2B is a schematic diagram of the locking mechanism of the adjustment mechanism of FIG. 2A being locked in the Y direction.

FIG. 2C is a schematic diagram illustrating the assembly of the adjustment mechanism of FIG. 2A and the light source module of FIG. 1 together.

FIG. 2D is a schematic diagram illustrating the assembly of the adjustment mechanism of FIG. 2A with the light source module and the collimating lens in FIG. 1.

2E is a schematic diagram illustrating the assembly of the adjusting mechanism of FIG. 2A with a heat sink, the light source module and the collimating lens in FIG. 1.

3A is a three-dimensional exploded schematic diagram of an adjustment mechanism and the beam splitter and collimator lens in FIG. 1 according to another embodiment of the present invention.

FIG. 3B is a schematic top view of FIG. 3A.

4A is a three-dimensional exploded schematic diagram of an adjustment mechanism and the beam splitter and collimator lens in FIG. 1 according to another embodiment of the present invention.

Fig. 4B is a schematic top view of Fig. 4A.

4C to 4D are schematic diagrams of adjusting the position of the beam splitter by the adjusting mechanism of FIG. 4A.

FIG. 1 is a schematic diagram of a light combining module according to an embodiment of the present invention. FIG. 2A is a schematic diagram of an adjustment mechanism according to an embodiment of the present invention. Figure 2B Shown is a schematic diagram of the locking mechanism of the adjustment mechanism in FIG. 2A being locked in the Y direction. FIG. 2C is a schematic diagram illustrating the assembly of the adjustment mechanism of FIG. 2A and the light source module of FIG. 1 together. FIG. 2D is a schematic diagram illustrating the assembly of the adjustment mechanism of FIG. 2A with the light source module and the collimating lens in FIG. 1. 2E is a schematic diagram illustrating the assembly of the adjusting mechanism of FIG. 2A with a heat sink, the light source module and the collimating lens in FIG. 1.

1 and 2A at the same time, the light combining module 10 of this embodiment includes a plurality of light source modules 120, 140, 160, 180, a plurality of beam splitters 220, 240, and a plurality of collimating lenses 320, 340, 360 , 380, 390 and an adjustment mechanism 520. Here, the light combining module 10 is, for example, applied to projectors, home theaters, rear projection screens, lighting fixtures, etc., and the number of light source modules 120, 140, 160, and 180 is embodied as four, but the present invention does not Limited by this. Specifically, the light source module 120 of this embodiment is, for example, a red light-emitting diode for outputting red light 122; the light source module 140 is, for example, a blue light-emitting diode for outputting blue light 142; The group 160 is, for example, a blue light emitting diode covered with an excitable green fluorescent layer for outputting green light 162; and the light source module 180 is, for example, a blue light emitting diode for outputting blue light 182. Here, the light source modules 120, 140, 160, and 180 use light-emitting diodes as electric light sources, that is, the light source modules 120, 140, 160, and 180 are electric light source modules. However, in other embodiments, a laser diode or a mercury lamp can also be used as the light source, which still falls within the scope of protection of the embodiments of the present invention.

As shown in FIG. 1, the collimating lenses 320, 340, 360, and 380 of this embodiment are arranged between the light source modules 120, 140, 160, and 180 and the beam splitters 220, 240. Specifically, the collimating lens 320 is disposed between the light source module 120 and the beam splitter 220, And it is located on the transmission path of the red light 122. The collimator lens 340 is disposed between the light source module 140 and the beam splitter 240 and is located on the transmission path of the blue light 142. The collimating lens 360 is disposed between the light source module 160 and the beam splitter 240 and is located on the transmission path of the green light 162. The collimator lens 380 is disposed between the light source module 180 and the beam splitter 240 and is located on the transmission path of the blue light 182. The collimating lens 390 is disposed between the beam splitter 220 and the beam splitter 240 and is located on the transmission path of the blue light 142 and the green light 162.

Furthermore, referring to FIG. 1 again, the beam splitter 220 of this embodiment is arranged on the transmission path of the red light 122, the blue light 142 and the green light 162, and the beam splitter 240 is arranged on the blue light 182 and the blue light 142. With the green light 162 on the transmission path. In detail, the beam splitter 240 can reflect the blue light 182 to the light source module 160 to excite the light source module 160 to output the green light 162, and the beam splitter 240 can also reflect the blue light 142 to the beam splitter 220. The output green light 162 can penetrate the beam splitter 240. The beam splitter 220 can be used to combine the red light 122, the blue light 142 and the green light 162 emitted from the beam splitter 240, so that the light combining module 10 of this embodiment can emit white light.

In particular, the light source module 160 is used as the light source with a blue light-emitting diode covered with an excitable green fluorescent layer. In addition to being excited by the blue light-emitting diode underneath, the green fluorescent layer can also be excited. The blue light 182 output by the light source module 180 can be reflected to the light source module 160 through the beam splitter 240, thereby exciting the green fluorescent layer and prompting the light source module 160 to output stronger green light 162, thereby improving the light combining mode The brightness of group 10 and the image quality applied to the projector.

2A, the adjustment mechanism 520 in this embodiment includes a plurality of first elastic members 522, a plurality of second elastic members 524, and a locking member 526. The first elastic member 522 is located in the first direction X, the second elastic member 524 is located in the second direction Y, and the first direction X is perpendicular to the second direction Y. The locking mechanism 526 can abut the first elastic mechanism 522 to elastically deform the first elastic mechanism 522, so that the adjustment mechanism 520 can move in the first direction X; or, please refer to FIG. 2B, the locking mechanism The member 526 abuts against the second elastic member 524 to elastically deform the second elastic member 524 so as to move the adjustment mechanism 520 in the second direction Y. In one embodiment, the first elastic member 522 and the second elastic member 524 may also be, for example, a spring or a leaf spring, and the locking member 526 may be, for example, a screw or a bolt, but the embodiment of the present invention is not limited thereto. .

As shown in FIG. 2C, the light source module 160 of this embodiment can be assembled in the adjustment mechanism 520; or, as shown in FIG. 2D, the collimating lens 360 is assembled on the light source module 160, and the light source module 160 is assembled in the adjustment mechanism. Mechanism 520; or, as shown in FIG. 2E, the light combining module 10 further includes a heat sink 620, wherein the heat sink 620 is disposed on the adjusting mechanism 520, and the light source module 160 is disposed on the heat sink 620, so that the heat sink 620 is configured Between the light source module 160 and the adjustment mechanism 520, the collimating lens 360 is assembled on the light source module 160, and the light source module 160 is assembled on the adjustment mechanism 520. When the beam splitter 240 reflects the blue light 182 to the predetermined position of the light source module 160 deviating, that is, the blue light 182 is not projected on the predetermined position of the light source module 160, which will cause the excitation efficiency of the light source module 160 to be lost. At this time, the position of the light source module 160 can be adjusted by the adjustment mechanism 520, for example, the locking mechanism 526 of the adjustment mechanism 520 is abutted against the first elastic member 522, so that the first elastic member 522 is elastically deformed to Light source module 160 moves in the first direction X, and for example, the locking mechanism 526 of the adjustment mechanism 520 is abutted against the second elastic mechanism 524, and the second elastic mechanism 524 is elastically deformed, so that the light source module 160 is in the second Moving in the direction Y, so that the blue light 182 is incident on the predetermined position of the light source module 160 to ensure that the excitation efficiency of the light source module 160 will not be excessively lost.

Of course, the embodiment of the present invention does not limit the structural form of the adjustment mechanism and the adjustable components of the adjustment mechanism. Hereinafter, two embodiments will be used to describe the structure of the adjustment mechanism of different forms and the adjustable components of the adjustment mechanism respectively, and will be described in detail in conjunction with FIGS. 3A to 3B and FIGS. 4A to 4D.

3A is a three-dimensional exploded schematic diagram of an adjustment mechanism and the beam splitter and collimator lens in FIG. 1 according to another embodiment of the present invention. FIG. 3B is a schematic top view of FIG. 3A. Referring to FIGS. 3A and 3B at the same time, the adjustment mechanism 540 of this embodiment includes an upper cover 640 and a base 660. The top surface 640 a of the upper cover 640 has a limiting groove 642, and the bottom surface 660 a of the base 660 has a sliding groove 662. The collimating lens 360 is assembled in the adjusting mechanism 540, and the collimating lens 360 has a limiting member 362 and a locking member 364. The limiting member 362 protrudes from the limiting groove 642 of the upper cover 640, and the locking member 364 is slidably disposed in the sliding groove 662 to enable relative movement between the collimator lens 360 and the light source module 160, as shown in FIG. 3B. The relative movement includes movement, rotation, or movement and rotation.

As shown in FIG. 3B, when the blue light 182 reflected by the beam splitter 240 is deviated from the predetermined position of the light source module 160, that is, the blue light 182 is not projected on the predetermined position of the light source module 160, but is, for example, projected on When the light source module deviates from the predetermined position, the position of the collimating lens 360 can be adjusted by the adjusting mechanism 540, for example, the alignment The straight lens 360 protrudes from the limiting member 362 of the limiting groove 642 of the upper cover 640 to apply force, so that the collimating lens 360 can move, rotate or move and rotate in the limiting groove 642 of the upper cover 640 and the sliding groove 662 of the base 660 , So that there is relative movement between the collimating lens 360 and the light source module 160. In this way, the blue light 182 can be projected on a predetermined position of the light source module 160 to ensure that the excitation efficiency of the light source module 160 is not excessively lost.

4A is a three-dimensional exploded schematic diagram of an adjustment mechanism and the beam splitter and collimator lens in FIG. 1 according to another embodiment of the present invention. Fig. 4B is a schematic top view of Fig. 4A. 4C to 4D are schematic diagrams of adjusting the position of the beam splitter by the adjusting mechanism of FIG. 4A.

Please refer to FIGS. 4A to 4B at the same time. The adjustment mechanism 560 of this embodiment is similar to the adjustment structure 540 of FIGS. 3A to 3B. The bottom surface 660a of the base 660 has a sliding groove 664. The beam splitter 240 is assembled in the adjusting mechanism 560, and the beam splitter 240 has a limiting member 242 and a locking member 244. The limiting member 242 protrudes from the limiting groove 644 of the upper cover 640, and the locking member 244 is slidably disposed in the sliding groove 664 to enable relative movement between the beam splitter 240 and the light source module 160. The relative movement includes movement (please Refer to Figure 4C), rotate (refer to Figure 4D) or move and rotate (refer to Figure 4B).

In short, due to the design of the adjusting mechanism 520 (or adjusting mechanism 540, or adjusting mechanism 560) in the light combining module 10 of this embodiment, the light combining module 10 can utilize the adjusting mechanism 520 (or adjusting mechanism 540, Or adjustment mechanism 560) to adjust the position of the light source module 160, the position of the beam splitter 240, or the position of the collimating lens 360 It is set to ensure that the blue light 182 is reflected to the predetermined position of the light source module 160 without excessive deviation, so as to achieve better excitation efficiency.

It should be noted that in the above embodiment, there are four light source modules 120, 140, 160, 180, two beam splitters 220, 240, five collimating lenses 320, 340, 360, 380, 390, and one The light combining module 10 of the adjustment mechanism 520 (or the adjustment mechanism 540 or the adjustment mechanism 560) is taken as an example for illustration. However, in other embodiments, if the light combining module needs to improve the excitation efficiency of the phosphor layer of the configured light source film group, the light combining module must have at least two light source modules, such as light source modules 160, 180 , A beam splitter, such as a beam splitter 240, two collimating lenses 360, 380, and an adjustment mechanism 520 (or adjustment mechanism 540, or adjustment mechanism 560), in this way, it can be like the light combining in the embodiment of the present invention The module has the effect of higher brightness and image quality applied to the projector.

[Tolerance Analysis]

In the following, a tolerance analysis will be performed for the first type of LED and the second type of LED to evaluate the degree of excitation efficiency loss caused when the position of the blue light 182 projected on the light source module 160 is deviated. Then, since the position deviation can occur on the short axis and the long axis of the collimator lens 360 at the same time, the position deviation of the short axis deviation and the position deviation of the long axis deviation will be used to evaluate the effective excitation area and The influence of excitation efficiency loss is shown in Table 1 and Table 2. Among them, Table 1 is the evaluation result of the first type of LED, and Table 2 is the evaluation result of the second type of LED.

[Table I]

From the evaluation results in Table 1 and Table 2, it can be seen that the position deviation of the collimating lens 360 in different directions (ie, the short axis or the long axis) will cause different excitation efficiency losses. Since the effective excitation area of the second type LED is smaller than that of the first type LED, the excitation efficiency loss of the second type LED is more obvious under the same position deviation. If the adjustment mechanism 520 (or the adjustment mechanisms 540, 560) is used to adjust the position of the light source module 160, the position of the beam splitter 240, or the position of the collimator lens 360, to ensure that the blue light 182 is reflected to the predetermined position of the light source module 160 There is no deviation, that is, when the position deviation is 0mm, the cumulative tolerance can be greatly reduced to increase the effective excitation area and solve the problem of the loss of excitation efficiency.

In summary, since the light combining module of the embodiment of the present invention is provided with an adjustment mechanism, the design of the adjustment mechanism can be used to adjust the position of the light source module, the position of the beam splitter, or the position of the collimating lens, so as to change the beam splitter. The light is reflected to the position of the light source module to achieve better excitation efficiency. In short, the light combining module of the embodiment of the present invention can have higher brightness performance and image quality when applied to a projector.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

10‧‧‧Heguang Module

120, 140, 160, 180‧‧‧Light source module

122‧‧‧Red light

142‧‧‧Blue light

162‧‧‧Green light

182‧‧‧Blue light

220、240‧‧‧Splitter

320, 340, 360, 380, 390‧‧‧collimating lens

Claims (10)

A light combining module includes: a first electric light source for outputting a first light; a second electric light source for outputting a second light; a first beam splitter arranged between the first light and the On the transmission path of the second light, wherein the first light enters the second electric light source through the first beam splitter; and a first adjustment mechanism that can adjust the overall position of the second electric light source, wherein the second electric light source The electric light source is arranged on the first adjustment mechanism, and the second electric light source does not change position with time. As for the light combining module described in claim 1, wherein the first electric light source includes a blue light-emitting diode disposed in a first electric light source module, and the second electric light source includes a cover with a The blue light-emitting diode that can excite the green fluorescent layer is arranged in a second electric light source module. A light combining module includes: a first electric light source module for outputting a first blue light; a second electric light source module for outputting a green light; and a third electric light source module for outputting A second blue light; a fourth electric light source module for outputting a red light; a first beam splitter arranged on the transmission path of the first blue light, the second blue light and the green light, wherein the first Blue light enters the second electric light source module through the first beam splitter; A second beam splitter is arranged on the transmission path of the red light, the second blue light, and the green light; and a first adjustment mechanism for changing the incidence of the first blue light on the entire second electric light source module Position, wherein the second electric light source module is arranged on the first adjustment mechanism, and the second electric light source module does not change position with time. Such as the light combining module described in item 3 of the scope of patent application, wherein the first electric light source module and the third electric light source module are respectively a blue light-emitting diode, and the second electric light source module is A blue light-emitting diode covered with a fluorescent layer that can excite green light, and the fourth electric light source module is a red light-emitting diode. According to the light combining module described in any one of items 2 to 4 of the scope of patent application, the second electric light source module further includes a collimating lens. The light combining module described in item 5 of the scope of patent application, wherein the second electric light source module satisfies one of the following conditions: (1) the second electric light source module is directly disposed on the first adjusting mechanism; and ( 2) The light combining module further includes a heat sink disposed on the first adjusting mechanism, and the second electric light source module is directly disposed on the heat sink, and the heat sink is disposed on the first adjusting mechanism. For the light combining module described in any one of items 3 to 4 of the scope of patent application, the second electric light source module further includes a collimating lens, and the first adjustment mechanism is a second adjustment mechanism Instead, the second adjustment mechanism includes a base, and a bottom surface of the base has a sliding groove, the first beam splitter or the collimating lens has a buckle, and the buckle is slidably disposed in the sliding groove. For the light combining module described in item 7 of the scope of patent application, the second adjusting mechanism further includes an upper cover, and a top surface of the upper cover has a limiting groove, and the first beam splitter or the collimating lens has A limiting member, and the limiting member protrudes from the limiting slot of the upper cover. For example, the combined light module according to any one of items 2 to 4 of the scope of patent application, wherein the first adjustment mechanism includes a plurality of first elastic members and a first locking member, the first The elastic mechanism is located in a first direction, and the first locking mechanism abuts against the first elastic mechanisms, so that the second electric light source module can move in the first direction. As described in item 9 of the scope of patent application, the first adjustment mechanism further includes a plurality of second elastic members and a second locking mechanism, and the second elastic members are located at a second In the direction, the second locking mechanism abuts against the second elastic members, so that the second electric light source module can move in the second direction, which is different from the second direction.

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