CN109507843B

CN109507843B - Light-combining module

Info

Publication number: CN109507843B
Application number: CN201710826084.8A
Authority: CN
Inventors: 张语宸; 云麒锥; 陈怡学
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2017-09-14
Filing date: 2017-09-14
Publication date: 2022-01-21
Anticipated expiration: 2037-09-14
Also published as: CN109507843A

Abstract

The invention discloses a light combining module, which comprises a first light source, a second light source, a first spectroscope and a first adjusting structure. The first light source is used for outputting first light. The second light source is used for outputting second light. The first beam splitter is disposed on a 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 adjusting structure adjusts the position of the second light source. The light combining module has higher brightness performance and improves the imaging quality of the projector.

Description

Light-combining module

Technical Field

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

Background

In the conventional projection module, a red LED, a blue LED and a green LED are used to generate a projection light. The brightness of the image projected by the projection module is determined by 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 problems to be solved in the art.

Disclosure of Invention

Embodiments of the present invention provide a light combining module, which uses an adjusting mechanism to adjust a position of a light source, a position of a beam splitter, or a position of a collimating lens, so as to improve a brightness performance of the light combining module, and to have a higher brightness and improve an imaging quality applied to a projector.

The light combining module of an embodiment of the present invention includes a first light source, a second light source, a first beam splitter and a first adjusting structure. The first light source is used for outputting first light. The second light source is used for outputting second light. The first beam splitter is disposed on a 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 adjusting structure adjusts the position of the second light source.

The light combining module in an embodiment of the present invention 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 adjusting mechanism. The first light source module is used for outputting first blue light. The second light source module is used for outputting green light. The third light source module is used for outputting second blue light. The fourth light source module is used for outputting red light. The first beam splitter is disposed on a transmission path of the first blue light, the second blue light and the green light, wherein the first blue light is incident to the second light source module through the first beam splitter. The second spectroscope is arranged on the transmission path of the red light, the second blue light and the green light. The first adjusting mechanism is used for changing the position of the first blue light incident to the second light source module.

Based on the above, since the light combining module of the embodiment of the invention is provided with the adjusting mechanism, the design of the adjusting 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 position of the light beam incident on the light source module, thereby achieving better excitation efficiency. In short, the light combining module of the embodiment of the invention can have higher brightness performance and improve the imaging quality applied to the projector.

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view illustrating a light combining module according to an embodiment of the invention.

Fig. 2A is a schematic view illustrating an adjusting mechanism according to an embodiment of the invention.

FIG. 2B is a schematic view of the locking member of the adjusting mechanism of FIG. 2A locked in the Y direction.

Fig. 2C is a schematic view illustrating the adjustment mechanism of fig. 2A and the light source module of fig. 1 assembled together.

Fig. 2D is a schematic view illustrating the adjustment mechanism of fig. 2A assembled with the light source module and the collimating lens of fig. 1.

Fig. 2E is a schematic view illustrating the adjusting mechanism of fig. 2A assembled with a heat sink, the light source module and the collimating lens of fig. 1.

Fig. 3A is an exploded perspective view of an adjusting mechanism and the beam splitter and the collimating lens shown in fig. 1 according to another embodiment of the present invention.

Fig. 3B is a schematic top view of fig. 3A.

Fig. 4A is an exploded perspective view of an adjusting mechanism and the beam splitter and the collimating lens shown in fig. 1 according to another embodiment of the present invention.

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

Fig. 4C to 4D are schematic diagrams illustrating the adjusting mechanism of fig. 4A adjusting the position of the beam splitter.

Detailed Description

Fig. 1 is a schematic view illustrating a light combining module according to an embodiment of the invention. Fig. 2A is a schematic view illustrating an adjusting mechanism according to an embodiment of the invention. FIG. 2B is a schematic view of the locking member of the adjusting mechanism of FIG. 2A locked in the Y direction. Fig. 2C is a schematic view illustrating the adjustment mechanism of fig. 2A and the light source module of fig. 1 assembled together. Fig. 2D is a schematic view illustrating the adjustment mechanism of fig. 2A assembled with the light source module and the collimating lens of fig. 1. Fig. 2E is a schematic view illustrating the adjusting mechanism of fig. 2A assembled with a heat sink, the light source module and the collimating lens of fig. 1.

Referring to fig. 1 and fig. 2A, the light combining module 10 of the present embodiment includes a plurality of

light source modules

120, 140, 160, and 180, a plurality of

beam splitters

220 and 240, a plurality of

collimating lenses

320, 340, 360, 380, and 390, and an adjusting mechanism 520. Here, the light combining module 10 is applied to a projector, a home theater, a rear projection screen, a lighting fixture, etc., for example, and the number of the

light source modules

120, 140, 160, 180 is embodied as four, but the invention is not limited thereto. Specifically, the light source module 120 of the present embodiment is, for example, a red light emitting diode, for outputting red light 122; the light source module 140 is, for example, a blue LED, for outputting a blue light 142; the light source module 160 is, for example, a blue LED covered with a green-light-excitable fluorescent layer for outputting green light 162; the light source module 180 is, for example, a blue LED, for outputting a blue light 182. Here, the

light source modules

120, 140, 160, 180 use light emitting diodes as light sources, but in other embodiments, laser diodes or mercury lamps may be used as light sources, which still fall within the intended protection scope of the embodiments of the present invention.

As shown in fig. 1, the

collimating lenses

320, 340, 360, and 380 of the present embodiment are disposed between the

light source modules

120, 140, 160, and 180 and the

beam splitters

220 and 240. Specifically, the collimating lens 320 is disposed between the light source module 120 and the beam splitter 220, and is located on the transmission path of the red light 122. The collimating lens 340 is disposed between the light source module 140 and the beam splitter 240 and 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 located on the transmission path of the green light 162. The collimating 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 located on the transmission path of the blue light ray 142 and the green light ray 162.

Referring to fig. 1 again, the beam splitter 220 of the present embodiment is disposed on the transmission paths of the red light 122, the blue light 142, and the green light 162, and the beam splitter 240 is disposed on the transmission paths of the blue light 182, the blue light 142, and the green light 162. In detail, the beam splitter 240 can reflect the blue light 182 to the light source module 160, so that the excitation light source module 160 outputs 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 may pass through a 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 the present embodiment can emit white light.

In particular, the light source module 160 uses the blue led covered with the green phosphor layer as the light source, and the green phosphor layer can be excited by the blue led thereunder, and can also reflect the blue light 182 outputted from the light source module 180 to the light source module 160 through the beam splitter 240, so as to excite the green phosphor layer and enable the light source module 160 to output the stronger green light 162, thereby improving the brightness of the light combining module 10 and the image quality applied to the projector.

Referring to fig. 2A, the adjusting mechanism 520 in the present 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 a first direction X, the second elastic member 524 is located in a second direction Y, and the first direction X is perpendicular to the second direction Y. The locking mechanism 526 can abut against the first elastic member 522 to elastically deform the first elastic member 522 so as to move the adjusting mechanism 520 in the first direction X; alternatively, referring to fig. 2B, the locking mechanism 526 abuts against the second elastic mechanism 524 to elastically deform the second elastic mechanism 524, so that the adjusting mechanism 520 moves in the second direction Y. In one embodiment, the first elastic member 522 and the second elastic member 524 may be a spring or a leaf spring, for example, and the locking member 526 is a screw or a bolt, for example, but the embodiment of the invention is not limited thereto.

As shown in fig. 2C, the light source module 160 of the present embodiment can be assembled to the adjusting mechanism 520; alternatively, 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 on the adjusting mechanism 520; alternatively, 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, the light source module 160 is disposed on the heat sink 620, the heat sink 620 is disposed between the light source module 160 and the adjusting mechanism 520, the collimating lens 360 is assembled on the light source module 160, and the light source module 160 is assembled on the adjusting mechanism 520. When the blue light 182 is reflected by the beam splitter 240 to a predetermined position of the light source module 160, the blue light 182 is not projected to the predetermined position of the light source module 160, which results in a loss of the excitation efficiency of the light source module 160. At this time, the position of the light source module 160 can be adjusted by the adjusting mechanism 520, for example, the locking member 526 of the adjusting mechanism 520 abuts against the first elastic member 522 to elastically deform the first elastic member 522, so as to move the light source module 160 in the first direction X, and for example, the locking member 526 of the adjusting mechanism 520 abuts against the second elastic member 524 to elastically deform the second elastic member 524, so as to move the light source module 160 in the second direction Y, so as to make the blue light 182 incident on the predetermined position of the light source module 160, so as to ensure that the excitation efficiency of the light source module 160 is not excessively lost.

Of course, the embodiments of the present invention do not limit the structural configuration of the adjustment mechanism and the adjustable components of the adjustment mechanism. The structure of the adjustment mechanism and the adjustable components of the adjustment mechanism with different forms will be described in detail below with reference to fig. 3A to 3B and fig. 4A to 4D.

Fig. 3A is an exploded perspective view of an adjusting mechanism and the beam splitter and the collimating lens shown in fig. 1 according to another embodiment of the present invention. Fig. 3B is a schematic top view of fig. 3A. Referring to fig. 3A and fig. 3B, the adjusting mechanism 540 of the present embodiment includes an upper cover 640 and a base 660. The top surface 640a of the upper cover 640 has a limiting groove 642, and the bottom surface 660a 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 out of the limiting groove 642 of the upper cover 640, and the locking member 364 is slidably disposed in the sliding groove 662, so that the collimating lens 360 and the light source module 160 have a relative motion, as shown in fig. 3B, the relative motion includes moving, rotating, or moving and rotating.

As shown in fig. 3B, when the blue light beam 182 is reflected by the beam splitter 240 to a predetermined position of the light source module 160, i.e. the blue light beam 182 is not projected onto the predetermined position of the light source module 160, but is projected onto the predetermined position of the light source module, for example, the position of the collimating lens 360 can be adjusted by the adjusting mechanism 540, for example, the collimating lens 360 is forced by the limiting member 362 protruding from the limiting groove 642 of the upper cover 640, 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 the collimating lens 360 and the light source module 160 have relative movement. In this way, the blue light 182 can be projected on the predetermined position of the light source module 160 to ensure that the excitation efficiency of the light source module 160 is not greatly lost.

Fig. 4A is an exploded perspective view of an adjusting mechanism and the beam splitter and the collimating lens shown in fig. 1 according to another embodiment of the present invention. Fig. 4B is a schematic top view of fig. 4A. Fig. 4C to 4D are schematic diagrams illustrating the adjusting mechanism of fig. 4A adjusting the position of the beam splitter.

Referring to fig. 4A to 4B, the adjusting mechanism 560 of the present embodiment is similar to the adjusting mechanism 540 of fig. 3A to 3B, but the two main differences are: the top surface 640a of the upper cover 640 has a limiting groove 644, and 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 position-limiting member 242 protrudes out of the position-limiting groove 644 of the upper cover 640, and the locking member 244 is slidably disposed in the sliding groove 664, so that the beam splitter 240 and the light source module 160 have relative movement, which includes movement (see fig. 4C), rotation (see fig. 4D), or movement and rotation (see fig. 4B).

In short, due to the design of the adjusting mechanism 520 (or the adjusting mechanism 540, or the adjusting mechanism 560) in the light combining module 10 of the present embodiment, the light combining module 10 can utilize the adjusting mechanism 520 (or the adjusting mechanism 540, or the adjusting 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, so as to ensure that the predetermined position of the blue light 182 reflected to the light source module 160 is not too deviated, thereby achieving a better excitation efficiency.

It should be noted that, in the above embodiment, the light combining module 10 having four

light source modules

120, 140, 160, 180, two

beam splitters

220, 240, five

collimating lenses

320, 340, 360, 380, 390, and an adjusting mechanism 520 (or an adjusting mechanism 540, or an adjusting mechanism 560) is taken as an example. However, in other embodiments, if the light combining module needs to improve the excitation efficiency of the phosphor layer of the light source module, the light combining module at least has two light source modules, such as the

light source modules

160 and 180, a beam splitter, such as the beam splitter 240, two

collimating lenses

360 and 380, and an adjusting mechanism 520 (or the adjusting mechanism 540 or the adjusting mechanism 560), so that the light combining module in the embodiments of the present invention has higher brightness and the effect of improving the imaging quality applied to the projector.

[ tolerance analysis ]

Tolerance analysis is performed on the first type LED and the second type LED to evaluate the loss of the excitation efficiency caused by the deviation of the position of the blue light 182 projected on the light source module 160. Then, since the positional deviation can occur on both the short axis and the long axis of the collimator lens 360, the influence of the positional deviation amount with respect to the short axis deviation and the positional deviation amount with respect to the long axis deviation on the effective excitation area and the excitation efficiency loss is evaluated as shown in the table one and the table two. The first table is the evaluation result of the first type of LED, and the second table is the evaluation result of the second type of LED.

[ watch one ]

[ second table ]

From the evaluation results of table one and table two, it can be seen that the position deviation in different directions (i.e. short axis or long axis) of the collimating lens 360 will cause different excitation efficiency losses. Because 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 amount. If the position of the light source module 160, the position of the beam splitter 240, or the position of the collimating lens 360 is adjusted by the adjusting mechanism 520 (or the adjusting mechanisms 540, 560) to ensure that there is no deviation in the predetermined position of the blue light 182 reflected to the light source module 160, i.e. the deviation of the position is 0mm, the accumulated tolerance can be greatly reduced to increase the effective excitation area and solve the problem of the loss of the excitation efficiency.

In summary, since the light combining module of the embodiment of the invention is provided with the adjusting mechanism, the position of the light source module, the position of the beam splitter or the position of the collimating lens can be adjusted by the design of the adjusting mechanism, so as to change the position of the light beam reflected by the beam splitter to the light source module, thereby achieving better excitation efficiency. In short, the light combining module of the embodiment of the invention can have higher brightness performance and imaging quality applied to the projector.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. An optical combiner module, comprising:

a first light source for outputting a first light;

a second light source for outputting a second light;

a first beam splitter disposed on a 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; and

the first adjusting mechanism adjusts the position of the second light source and comprises a first elastic member and a first locking member, wherein the first elastic member is located in a first direction, and the first locking member abuts against the first elastic member to enable the second light source to move in the first direction.

2. The light combining module of claim 1, wherein the first light source comprises a blue light emitting diode disposed in a first light source module, and the second light source comprises a blue light emitting diode covered with a green-excitable phosphor layer disposed in a second light source module.

3. The light combining module of claim 2, wherein the second light source module further comprises a collimating lens.

4. The light combining module of claim 3, wherein the second light source module satisfies one of the following conditions:

(1) the second light source module is arranged on the first adjusting mechanism; and

(2) the light combining module further comprises a radiator arranged on the first adjusting mechanism, and the second light source module is arranged on the radiator.

5. The light combining module of any one of claims 1 to 2, wherein the first adjusting mechanism further comprises a plurality of first elastic members, the first elastic members are located in a first direction, and the first locking member abuts against the first elastic members to move the second light source module in the first direction.

6. The light combining module of claim 5, wherein the first adjusting mechanism further comprises a plurality of second elastic members and a second locking member, the second elastic members are located in a second direction, the second locking member abuts against the second elastic members to move the second light source module in the second direction, and the first direction is different from the second direction.

7. An optical combiner module, comprising:

a first light source module for outputting a first blue light;

a second light source module for outputting a green light;

a third light source module for outputting a second blue light;

a fourth light source module for outputting a red light;

the first spectroscope is arranged on a transmission path of the first blue light, the second blue light and the green light, wherein the first blue light is incident to the second light source module through the first spectroscope;

the second spectroscope is arranged on the transmission paths of the red light, the second blue light and the green light; and

the second adjusting mechanism is used for changing the position of the first blue light which is incident to the second light source module;

the second light source module further comprises a collimating lens, the second adjusting mechanism comprises a base, a sliding groove is formed in the bottom surface of the base, the first spectroscope or the collimating lens is provided with a fastener, and the fastener is slidably arranged in the sliding groove.

8. The light combining module of claim 7, wherein the first light source module and the third light source module are respectively a blue LED, the second light source module is a blue LED covered with a green-light-excitable phosphor layer, and the fourth light source module is a red LED.

9. The light combining module of claim 7, wherein the second adjusting mechanism further comprises an upper cover, a top surface of the upper cover has a limiting groove, the first beam splitter or the collimating lens has a limiting member, and the limiting member protrudes out of the limiting groove of the upper cover.