TW201913216A - 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

Light module

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

In conventional projection modules, a red light emitting diode, a blue light emitting diode, and a green light emitting diode are mostly used 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 activate the green light emitting diode has become one of the problems to be solved in the field.

Embodiments of the present invention provide a light combining module that uses an adjustment mechanism to adjust a position of a light source, a position of a beam splitter, or a position of a collimating lens to improve brightness performance of a light combining module, and has high brightness and application. The quality of the image on the projector.

A light combining module according to an embodiment of the invention includes a first light source, a second light source, a first beam splitter, and a first adjustment structure. The first light source is for outputting the first light. The second light source is for outputting the second light. The first beam splitter is disposed on the transmission path of the first light and the second light, wherein the first light is incident to the second light source via the first beam splitter. The first adjustment structure adjusts the position of the second light source.

The light combining module according to an embodiment of the 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 adjustment mechanism. The first light source module is configured to output a first blue light. The second light source module is configured to output green light. The third light source module is configured to output a second blue light. The fourth light source module is configured to output red light. The first beam splitter is disposed on the transmission path of the first blue light, the second blue light, and the green light, wherein the first blue light is incident on the second light source module via the first beam splitter. The second beam splitter is disposed on the transmission path of the red light, the second blue light, and the green light. The first adjustment mechanism is configured to change a position at which 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 adjusting mechanism, the position of the light source, the position of the beam splitter or the position of the collimating lens can be adjusted by using the design of the adjusting mechanism to change the incidence of light into the light source module. The position to achieve better excitation efficiency. In short, the light combining module of the embodiment of the invention can have high brightness performance and image quality applied to the projector.

The above described features and advantages of the invention will be apparent from the following description.

FIG. 1 is a schematic diagram of a light combining module according to an embodiment of the invention. 2A is a schematic diagram of an adjustment mechanism according to an embodiment of the invention. 2B is a schematic view showing the locking mechanism of the adjusting mechanism of FIG. 2A locked in the Y direction. 2C is a schematic view showing the adjustment mechanism of FIG. 2A assembled with the light source module of FIG. 1. FIG. 2D is a schematic diagram of 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 showing the adjustment mechanism of FIG. 2A assembled with a heat sink and 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 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 applied to, for example, a projector, a home theater, a rear projection screen, a lighting fixture, etc., and the number of the light source modules 120, 140, 160, 180 is embodied as four, but the present invention does not This is limited to this. 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 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 are light-emitting diodes as the light source. However, in other embodiments, the laser diode or the mercury lamp may be used as the light source, which still belongs to the embodiment of the present invention. The scope of protection.

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 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 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 is located on the transmission path of the blue light 142 and the green light 162.

Moreover, referring to FIG. 1 again, the beam splitter 220 of the present embodiment is disposed on the transmission path of the red light 122, the blue light 142, and the green light 162, and the beam splitter 240 is disposed on the blue light 182 and the blue light 142. On the transmission path with green light 162. 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 the embodiment can emit white light.

In particular, the light source module 160 is provided with a blue light emitting diode covering the green light emitting layer as a light source, and the green fluorescent layer is excited by the blue light emitting diode below it. The blue light 182 outputted by the light source module 180 can be reflected by the beam splitter 240 to the light source module 160, thereby exciting the green fluorescent layer and causing the light source module 160 to output a strong green light 162, thereby improving the light combining mode. The brightness of group 10 and the image quality applied to the projector.

Referring to FIG. 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 mechanism 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 member 522 to elastically deform the first elastic member 522 to move the adjusting mechanism 520 in the first direction X; or, referring to FIG. 2B, the locking device The member 526 abuts the second elastic member 524 to elastically deform the second elastic member 524 to move the adjustment mechanism 520 in the second direction Y. In an 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 mechanism 526 is, 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 the present embodiment can be assembled to 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 and adjusted. The mechanism 520; or, as shown in FIG. 2E, the light-emitting module 10 further includes a heat sink 620, wherein the heat sink 620 is disposed on the adjustment mechanism 520, and the light source module 160 is disposed on the heat sink 620, and 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 spectroscope 240 reflects the blue light 182 to a predetermined position of the light source module 160, that is, the blue light 182 is not projected at a predetermined position of the light source module 160, which may cause loss of 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 mechanism 526 of the adjusting mechanism 520 abuts the first elastic member 522, and the first elastic member 522 is elastically deformed. The light source module 160 is moved in the first direction X, for example, the locking mechanism 526 of the adjusting mechanism 520 is abutted against the second elastic member 524, and the second elastic member 524 is elastically deformed to enable the light source module. The 160 moves in the second 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 is not excessively lost.

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

FIG. 3A is a perspective exploded view of the adjusting mechanism and the beam splitter and the collimating lens of FIG. 1 according to another embodiment of the present invention. FIG. FIG. 3B is a top plan view of FIG. 3A. Referring to FIG. 3A and FIG. 3B simultaneously, the adjustment 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 slot 642, and the bottom surface 660a of the base 660 has a sliding slot 662. The collimating lens 360 is assembled in the adjustment 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 slot 642 of the upper cover 640, and the locking member 364 is slidably disposed in the sliding slot 662 to have a relative movement between the collimating lens 360 and the light source module 160, as shown in FIG. 3B. Its relative motion includes movement, rotation or movement and rotation.

As shown in FIG. 3B, when the spectroscope 240 reflects the blue light 182 to a predetermined position of the light source module 160, that is, the blue light 182 is not projected at a predetermined position of the light source module 160, but is projected, for example. When the light source module is deviated from the predetermined position, the position of the collimating lens 360 can be adjusted by the adjusting mechanism 540. For example, the limiting lens 362 protruding from the limiting lens 360 of the upper cover 640 is biased to apply a collimating lens. The 360 can be moved, rotated or moved and rotated in the limiting slot 642 of the upper cover 640 and the sliding slot 662 of the base 660, so that the collimating lens 360 and the light source module 160 have relative motion. In this way, the blue light 182 can be projected at 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 perspective exploded view of the adjustment mechanism and the beam splitter and collimating lens of FIG. 1 according to another embodiment of the present invention. 4B is a top plan view of FIG. 4A. 4C to 4D are schematic views showing the position of the beam splitter of the adjustment mechanism of FIG. 4A.

Referring to FIG. 4A to FIG. 4B simultaneously, the adjustment mechanism 560 of the present embodiment is similar to the adjustment structure 540 of FIGS. 3A to 3B, but the main difference between the two is that the top surface 640a of the upper cover 640 has a limiting slot 644, and The bottom surface 660a of the base 660 has a chute 664. The beam splitter 240 is assembled in the adjustment mechanism 560, and the beam splitter 240 has a limiting member 242 and a latching member 244. The limiting member 242 protrudes from the limiting slot 644 of the upper cover 640, and the locking member 244 is slidably disposed in the sliding slot 664 for relative movement between the beam splitter 240 and the light source module 160, and 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, since the light combining module 10 of the embodiment has the design of the adjusting mechanism 520 (or the adjusting mechanism 540 or the adjusting mechanism 560), the light combining module 10 can utilize the adjusting mechanism 520 (or the adjusting mechanism 540, Or adjusting the 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 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 The efficiency of the excitation.

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. In other embodiments, if the light-emitting module needs to improve the excitation efficiency of the phosphor layer of the disposed light source film group, the light-emitting module must have at least two light source modules, such as the light source module 160 and 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), such that the light can be combined as in the embodiment of the present invention The module has high brightness and the image quality applied to the projector.

[Tolerance Analysis]

Tolerance analysis will be performed below 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 positional deviation can occur simultaneously on the short axis and the long axis of the collimating lens 360, the positional deviation amount of the short axis deviation and the position deviation of the long axis deviation are respectively evaluated for the effective excitation area and The effects of excitation efficiency loss are shown in Tables 1 and 2. Among them, Table 1 is the evaluation result of the first type LED, and Table 2 is the evaluation result of the second type LED.

[Table I]

[Table II]

It can be seen from the evaluation results of Tables 1 and 2 that the positional deviations in the different directions (i.e., the short axis or the long axis) of the collimator lens 360 will cause different excitation efficiency losses. Since the effective excitation area of the second type LED is smaller than the effective excitation area 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 adjustment mechanism 520 (or the adjustment mechanism 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 collimating lens 360, to ensure that the blue light 182 is reflected to the predetermined position of the light source module 160. When there is no deviation, that is, when the position deviation amount is 0 mm, the cumulative tolerance can be greatly reduced to increase the effective excitation area and solve the problem of loss of excitation efficiency.

In summary, since the light combining module of the embodiment of the present invention is provided with an 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 using the design of the adjusting mechanism to change the beam splitter. Reflect light to the position of the light source module to achieve better excitation efficiency. In short, the light combining module of the embodiment of the invention can have high brightness performance and image quality applied to the projector.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Huangguang Module

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

122‧‧‧Red light

142‧‧‧Blue light

162‧‧‧Green light

182‧‧‧Blue light

220, 240‧‧‧ beamsplitter

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

520, 540, 560‧ ‧ adjustment mechanism

522‧‧‧First elastic parts

524‧‧‧Second elastic parts

526‧‧‧Locking parts

242, 362‧‧‧ Limits

244, 364‧‧‧ fasteners

620‧‧‧heatsink

640‧‧‧上盖

640a‧‧‧ top

642, 644‧‧‧ Limit slots

660‧‧‧Base

660a‧‧‧ bottom

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 invention. 2A is a schematic diagram of an adjustment mechanism according to an embodiment of the invention. 2B is a schematic view showing the locking mechanism of the adjusting mechanism of FIG. 2A locked in the Y direction. 2C is a schematic view showing the adjustment mechanism of FIG. 2A assembled with the light source module of FIG. 1. FIG. 2D is a schematic diagram of 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 showing the adjustment mechanism of FIG. 2A assembled with a heat sink and the light source module and the collimating lens of FIG. 1. FIG. 3A is a perspective exploded view of the adjusting mechanism and the beam splitter and the collimating lens of FIG. 1 according to another embodiment of the present invention. FIG. FIG. 3B is a top plan view of FIG. 3A. 4A is a perspective exploded view of the adjustment mechanism and the beam splitter and collimating lens of FIG. 1 according to another embodiment of the present invention. 4B is a top plan view of FIG. 4A. 4C to 4D are schematic views showing the position of the beam splitter of the adjustment mechanism of FIG. 4A.

Claims (10)

A light combining module includes: a first light source for outputting a first light; a second light source for outputting a second light; a first beam splitter disposed at the first light and the second light a light transmission path, wherein the first light is incident on the second light source via the first beam splitter; and a first adjustment mechanism adjusts a position of the second light source. The light-emitting module of claim 1, wherein the first light source comprises a blue light-emitting diode disposed on a first light source module, and the second light source comprises an over-excited green The blue light emitting diode of the light fluorescent layer is disposed on a second light source module. A light combining module includes: a first light source module for outputting a first blue light; a second light source module for outputting a green light; and a third light source module for outputting a second a fourth light source module for outputting a red light; a first beam splitter disposed on the first blue light, the second blue light, and the green light transmission path, wherein the first blue light passes through the first light a second beam splitter is incident on the second light source module; a second beam splitter is disposed on the red light, the second blue light and the green light transmission path; and a first adjustment mechanism for changing the first A blue light is incident on the position of the second light source module. The light-emitting module of claim 3, wherein the first light source module and the third light source module are respectively a blue light-emitting diode, and the second light source module is covered with a cover The blue light emitting diode of the green fluorescent layer can be excited, and the fourth light source module is a red light emitting diode. The light combining module according to any one of the preceding claims, wherein the second light source module further comprises a collimating lens. The light-emitting module of claim 5, wherein the second light source module satisfies one of the following conditions: (1) the second light source module is disposed in the first adjustment mechanism; and (2) the The light-emitting module further includes a heat sink disposed on the first adjusting mechanism, and the second light source module is disposed on the heat sink. The light combining module of any one of the preceding claims, wherein the second light source module further comprises a collimating lens, and the first adjusting mechanism is replaced by a second adjusting mechanism. The second adjusting mechanism includes a base, and a bottom surface of the base has a sliding slot. The first beam splitter or the collimating lens has a latching member, and the latching member is slidably disposed on the sliding slot. The light combining module of claim 7, wherein the second adjusting mechanism further comprises an upper cover, and a top mask of the upper cover has a limiting slot, and the first beam splitter or the collimating lens has a limiting member protruding from the limiting slot of the upper cover. The light combining module of any one of the preceding claims, wherein the first adjusting mechanism comprises a plurality of first elastic members and a first locking mechanism, the first The elastic member is located in a first direction, and the first locking mechanism abuts the first elastic members to move the second light source module in the first direction. The light combining module of claim 9, wherein the first adjusting mechanism further comprises a plurality of second elastic members and a second locking mechanism, wherein the second elastic members are located at a second In the direction, the second locking mechanism abuts the second elastic members to move the second light source module in the second direction, the first direction being different from the second direction.