WO2017080404A1

WO2017080404A1 - Circuit board assembly, light source device, and projection equipment

Info

Publication number: WO2017080404A1
Application number: PCT/CN2016/104683
Authority: WO
Inventors: 陈永壮; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2015-11-10
Filing date: 2016-11-04
Publication date: 2017-05-18
Also published as: CN205176463U; TWM535923U

Abstract

A circuit board assembly, and a light source device and projection equipment which are respectively provided with a circuit board assembly. The circuit board assembly comprises a circuit board (100) provided with a plurality of electronic components (111, 112), and support seats (200, 200') provided with at least one concave part (280), at least one of the plurality of electronic components (111, 112) being contained in the concave part (280). According to the circuit board assembly, concave parts (280) of support seats (200, 200') are used for containing electronic components (111, 112) of a circuit board (100), such that the whole height of the circuit board assembly is reduced, and the circuit board assembly is compact in combination and small in free space. The light source device and the projection equipment provided with the circuit board assembly are smaller in external dimensions, which is beneficial to the miniaturization of the light source device and a minitype projector.

Description

Circuit board assembly, light source device and projection device

Technical field

The utility model relates to the field of electronics and optics, in particular to a circuit board assembly, a light source device and a projection device.

Background technique

An existing circuit board, such as a printed circuit board, has a plurality of electronic components arranged on one printing surface or a pair of printing surfaces. The types of electronic components include one or more of a capacitor, a resistor, an inductor, a CPU, etc. Where the electronic components are arranged on a printed surface of a printed circuit board (single-sided printed circuit board) supported by a plurality of studs seated on the same plane, in particular horizontal plane, and utilized A screw is used to thread the threaded holes in the single-sided printed circuit board and their corresponding studs to secure the two. The height of the stud is set to be greater than the height of the electronic component having the largest height among the plurality of electronic components such that all of the electronic components are spaced apart from the plane of the support by a certain distance to avoid the planarity of the plurality of electronic components and the support. Damage caused by mutual contact and extrusion, therefore, the assembled single-sided printed circuit board and the support have a large overall height and are not tightly fitted, resulting in a single-sided printed circuit board facing the support side and the support. There is too much free space between them. In the case where a plurality of electronic components are disposed on a pair of printing surfaces (double-sided printed circuit boards) of a printed circuit board, there is also a technical problem that the above-described single-sided printed circuit board supports and is fixed to a holder, and a plurality of electronic components They are not arranged on the pair of printing surfaces according to their respective heights. Therefore, the height of the plurality of electronic components on one printing surface facing the holder in the pair of printing surfaces may be greater than any electronic components located on the other printing surface. The height, which undoubtedly further increases the free space between the printed surface of the double-sided printed circuit board facing the support and the support, so that the height of the assembled double-sided printed circuit board and the support is further increased. Big.

technical problem

In addition, with the development of miniaturization of optical devices, especially projection devices, for example, the size of a pico projector is required to be as small as possible to improve portability and aesthetics, and one or more light source devices of a pico projector are generally installed. The single-sided printed circuit board or/and the double-sided printed circuit board described above, because the existing single-sided printed circuit board and the double-sided printed circuit board respectively have a total height of the circuit board assembly formed by the mating of the support Large, insufficiently tightly coupled, and excessive technical space problems, resulting in a compact size of a micro projector equipped with a light source device having the above-described circuit board assembly, which is disadvantageous for miniaturization of the light source device and the pico projector .

Technical solution

In order to overcome the deficiencies of the prior art, it is an object of the present invention to provide a circuit board assembly having a low overall height, tight fit, and low free space. Another object of the present invention is to provide a circuit board assembly. Light source device and projection device.

As an object of the present invention, a circuit board assembly includes a circuit board on which a plurality of electronic components are disposed and a holder provided with at least one recess; at least one of the plurality of electronic components is housed in the recess.

Further, the circuit board includes a first surface on which a plurality of first electronic components are disposed, and at least one of the plurality of first electronic components received in the recess has a height greater than that not included in the recess The height of the first electronic component.

Further, the circuit board includes a pair of opposite second and third faces, and a plurality of second electronic components and a plurality of third electronic components, the plurality of second electronic components are respectively disposed on the second surface and the third surface The height of at least one of the recesses accommodated in the recess is greater than the height of the other second electronic component not accommodated in the recess and the height of any one of the third electronic components.

As another object of the present invention, a light source device includes the above-described circuit board assembly.

Further, the mount is an optical mount for mounting the optical component.

Further, the optical component comprises a light source, and the optical support comprises a pair of support portions at the front and rear ends of the light path of the light source, the concave portion is located between the pair of support portions, and the pair of support portions abut against the circuit board.

Further, the pair of support portions are offset from the circuit board by screwing or screwing.

Further, the recesses are two, and a hollow protrusion in which the collecting lens is disposed is disposed between the two recesses.

Further, the optical support includes: a light source fixing portion for fixing the plurality of solid state light sources; and a first mirror fixing portion for fixing the first mirror corresponding to at least a portion of the plurality of solid state light sources; a light-splitting element fixing portion for fixing at least one light-splitting element, a light emitted by the solid-state light source of the transmitting portion of the light-splitting element and/or a light reflected by the partial first mirror; and a light for fixing the collecting lens a light lens fixing portion that converges light passing through the light separating element, the collecting lens fixing portion arranges the collecting lens in the hollow protrusion; a third mirror fixing portion for fixing the third mirror and The color wheel fixing portion of the fixed color wheel, the third mirror reflects the concentrated excitation light to the color wheel to excite the wavelength conversion material of the color wheel, and the solid state light source is a laser light source or an LED light source.

As still another object of the present invention, a projection apparatus includes the above-described light source device.

Beneficial effect

The circuit board assembly provided by the utility model, which accommodates the electronic components of the circuit board through the concave portion of the support, reduces the overall height of the circuit board assembly, makes the circuit board assembly closely cooperate, has less free space, and thus also installs The light source device and the projection device of the circuit board assembly have a small external size, which is advantageous for miniaturization of the light source device and the pico projector.

DRAWINGS

Figure 1 is a front elevational view of the circuit board assembly of the present invention;

Figure 2 is a front elevational view of the circuit board assembly of the present invention;

3 is a schematic structural view of an optical support in a circuit board assembly included in the light source device of the present invention;

Figure 4 is a front elevational view of the optical mount of Figure 3;

Figure 5 is a plan view of the optical support shown in Figure 4;

Figure 6 is a schematic view showing the structure in which the optical component is fixed in the optical holder shown in Figure 5.

BEST MODE FOR CARRYING OUT THE INVENTION

The present invention will be further described in detail below with reference to the accompanying drawings.

It should be noted that, unless otherwise stated, the height of the electronic component described in the specification refers to the free end of the electronic component and the face in a direction perpendicular to the face of the circuit board on which the electronic component is disposed. the distance. The overall height of the circuit board assembly refers to the maximum distance between the two free ends of the circuit board and the support opposite to each other in the direction perpendicular to the plane of the circuit board or the electronic components disposed on the side opposite to the support and the support. The maximum distance between the free end and the free end of the support facing away from the side of the board.

Referring to Figures 1, 2 and 3, the present invention provides a circuit board assembly comprising a circuit board 100 and a support 200 on which a plurality of electronic components, electronic components are disposed Types include one or more of a capacitor, a resistor, an inductor, a CPU, and the like. At least one recess 280 is provided on the support 200, and at least one electronic component is housed in the recess 280. Since the recess 280 of the holder 200 houses at least one electronic component therein, that is, the overall height of the circuit board 100 assembly formed by the combination of the circuit board 100 and the holder 200 is compressed to the approximate height of the electronic component, The cooperation is closer. Preferably, the support 200 abuts against the circuit board 100. The meaning of the abutment includes the support 200 contacting and supporting the circuit board 100 or the movable connection or fixed connection of the support 200 and the circuit board 100. Alternatively, the circuit board 100 may be removed from the support. Other components than 200 are supported and fixed to maintain their relative positions with the holder. In addition, the other components may be simultaneously coupled to the holder 200 to further secure the relative position between the circuit board 100 and the holder 200. It is easy to know that for other electronic components that are not accommodated in the recess 280, they need to be spaced from the support 200 to avoid damage to the electronic components caused by the contact between the two, so that it is preferable. The electronic components are disposed in one-to-one correspondence with the recesses 280 such that all the electronic components are received in the corresponding recesses 280, and the portion of the circuit board 100 facing the one side of the support 200 and not disposed with the electronic components is opposite to the support 200, thereby Further reducing the pitch set to prevent damage to the electronic component caused by the contact of the other electronic components not accommodated in the recess 280 with the holder 200 is caused, and thus the overall height of the assembly of the circuit board 100 is further compressed, so that the circuit board 100 There is less free space between the support and the stand 200.

The board can be a single-sided printed circuit board or a double-sided printed board. For a single-sided printed circuit board, the circuit board includes a first face on which a plurality of first electronic components are disposed, at least one of the plurality of first electronic components being received in the recess of the mount, and The height of the first electronic component housed in the recess is greater than the height of the other first electronic component. With this arrangement, even if a part of the first electronic component is not accommodated in the recess, since the first electronic component having the largest height in the first electronic component has been accommodated in the recess, the circuit is compressed as much as possible. The spacing between the board and the support reduces the overall height of the board assembly.

For a double-sided printed circuit board, the circuit board 100 includes a pair of opposite second faces 110 and a third face 120, and a plurality of second electronic components 111 and a plurality of the second face 110 and the third face 120 are respectively disposed The third electronic component 112, at least one of the plurality of second electronic components 111 is received in the recess 280 of the holder 200, and the height of the second electronic component 111 accommodated in the recess 280 is greater than that not contained in the recess 280 The height of the other second electronic component 111 and the height of any one of the third electronic components 112. The second electronic component 111 having the largest height among the second electronic component 111 and the third electronic component 112 can be accommodated in the recess 280 by arranging their positions on a pair of printing faces according to respective heights of the plurality of electronic components. Even if the third electronic component 112 and the partial second electronic component 111 are not accommodated in the recess 280, since the second electronic component 111 having the maximum height has been accommodated in the recess, the circuit is compressed as much as possible The spacing between the board 100 and the mount 200 reduces the overall height of the board assembly.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , in particular, the circuit board assembly of each embodiment described above is actually applied to a light source device, but it is easy to understand that the circuit of the inventive concept of the present invention is The board assembly is also suitable for installation in other electronic or optical devices. The light source device has the above-mentioned circuit board assembly, and the circuit board assembly has the advantages of low overall height, tight fit, and less space, so that the overall height of the light source device is also low, which is useful for, for example, a projection device that applies the light source device. The optical device reduces its outer dimensions.

As a preferred embodiment, an optical mount 200' for mounting an optical component is used as a support 200 for a circuit board assembly, the optical component comprising one or more of a solid state light source, an optical lens, a lens, and the like. In this case, the optical holder 200' functions not only to fix the optical element but also to support the circuit board 100, thereby reducing the number of components and further reducing the external dimensions of the light source device.

As a further improvement, the optical mount is for mounting a light source and further mounting other types of optical components, the optical mount comprising a pair of support portions at the front and rear ends of the light path of the light source, the recess being located between the pair of support portions, a pair of supports The part is offset from the board. Since the recess is disposed between the two support portions, the overall strength of the optical support is not greatly affected, and the support portion is disposed at both ends of the optical support, which can also provide a better support effect for the circuit board.

The pair of supporting portions of the optical support and the circuit board can be fixedly connected by screwing or screwing. Specifically, a plurality of pairs of threaded holes are correspondingly arranged on the pair of supporting portions and the circuit board, and the plurality of threads or The screws are respectively connected to the pair of threaded holes so that the support portion and the circuit board are coupled to each other, so that the optical support and the circuit board are installed quickly and easily.

Another specific, the recess 280 of the optical support 200' is set to two, and a hollow protrusion 290 for arranging the collecting lens is disposed between the two recesses 280. Since the size of the condensing lens is generally large, the design of the recess 280 is simplified by cleverly providing a hollow protrusion 290 accommodating the condensing lens to simultaneously form the two recesses 280, and the recess 280 is also utilized to accommodate Electronic components to reduce the overall height of the board assembly.

As a further improvement of the optical support 200' of the light source device, the specific structure of the optical support 200' will be described in more detail below. Referring to Figures 3 to 6, the optical support in the shape of a substantially inverted funnel is shown. Five through holes 271 as the light source fixing portion 210 are opened on the plate member 270 at the funnel opening of the 200', and one blue laser light source 310, 311, 312, 313 is fixedly mounted in each of the five through holes 281. And 314, a first mirror 320 and two first mirrors 321 are fixedly mounted on the first mirror fixing portion 220 on the left inner inclined surface and the right inner inclined surface of the optical support 200'. The spectroscopic element fixing portion 230, the second mirror fixing portion 250, and the condensing lens fixing portion 240 are disposed on the bottom wall connecting the left inclined surface and the right inner inclined surface, and the condensing lens fixing portion 240 is positioned at the spectroscopic element Above the portion 230 and the second mirror fixing portion 250, the collecting lens 340 is located in the hollow protrusion 290 formed by the wall projecting outward. The condensing lens 340 is disposed at a position substantially at the neck of the funnel, wherein the spectroscopic element fixedly mounted on the spectroscopic element fixing portion 230 is a polarizing plate 330, and the first surface of the polarizing plate 330 faces the first reflecting mirror 321, and the second reflecting mirror 350 Facing the first mirror 320, the acute angle between the polarizing plate 330 and the horizontal plane is 45°, and the first mirror 320 and the second mirror 350 are fixed to be perpendicular to the polarizing plate 330, respectively, by the blue laser light source 313 and After the excitation light emitted in the vertical direction is horizontally reflected by the first mirror 321 , the first surface of the polarizing plate 330 is further vertically reflected, and the excitation of the blue laser light source 310 in the vertical direction is emitted. After the light is horizontally reflected by the first mirror 320, it is vertically reflected by the second mirror 350 and further transmitted through the second surface of the polarizer 330 into the collecting lens 340, for other portions of the blue laser light source 311 and 312, the blue laser light source 312 is directly transmitted through the second surface of the polarizing plate 330 into the collecting lens 340 without reflection, and the blue laser light source 311 is directly incident on the collecting lens 340 without being reflected and transmitted by the polarizing plate. , The specific number and position setting of the light source fixing portion 210, the first mirror fixing portion 220, the polarizing plate fixing portion 230, and the collecting lens fixing portion 240 may be determined according to the number of blue laser light sources and the arrangement manner, for example, when When the blue laser light source 310 is cancelled, correspondingly, it is not necessary to provide the first mirror fixing portion 220 and the second mirror fixing portion 250, but this reduces the number of solid-state light sources, thereby being disadvantageous for obtaining a higher Luminous brightness. After each excitation light is incident on the condensing lens 340 and concentrated by the condensing lens 340, the concentrated excitation light is directed to the third mirror 360, and the third mirror 360 is fixed to the funnel facing the left side. The third mirror 360 extends toward the color wheel 370 on the rib extending from the opposite end of the mouth as the third mirror fixing portion 260. The color wheel 370 is fixedly coupled to the drive motor 371 and driven by the drive motor 371. The lower rotation operation is performed, and the drive motor 371 is fixed at the end portion by a boss type opening (not shown) which can serve as a color wheel fixing portion, thereby fixing the color wheel 370. The excitation light reflected by the third mirror 360 is incident on the excited surface of the color wheel 370 in a small spot, and the excited surface is uniformly distributed as a wavelength conversion material, such as a GRBW four-color phosphor, and then the phosphor The laser light is generated under the excitation of the blue laser and mixed to form a projection light source for subsequent use. It can be seen that the optical support 200' of the light source device not only forms a tightly fitting and low-profile circuit board assembly with the circuit board 100, but also the optical support 200' can compactly mount a plurality of optical components, and therefore, the optical support Block 200' plays two roles at the same time.

The present invention also provides a projection apparatus, and in particular, a micro projection apparatus that requires an outer size as small as possible, which adopts the light source apparatus described in any of the above embodiments, and refers to the light source apparatus described above. Advantageously, since the height of the circuit board assembly of the light source device is small and closely matched, the outer shape of the pico projector is reduced, thereby improving portability and aesthetics outside the pico projector.

In the above description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "height" and "overall height" is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present invention and The description is simplified, and is not intended to indicate or imply that the device or component referred to must have a particular orientation, configuration and operation in a particular orientation, and thus is not to be construed as limiting the invention. When the circuit board assembly is mounted in the electronic device in different orientations. Or in optical preparation, the height and overall height should also be correspondingly understood according to the different orientations. In addition, in general, the "height" and "overall height" described in this specification correspond to the corresponding circuit board assembly, The external dimensions of the light source device and the projection device have a direct impact.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

The above is a further detailed description of the present invention in conjunction with the specific embodiments, and the specific implementation of the present invention is not limited to the description. For those skilled in the art to which the present invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept.

Claims

1. A circuit board assembly, characterized by comprising:

a circuit board having a plurality of electronic components arranged;

a support having at least one recess;

At least one of the plurality of electronic components is housed in the recess.

2. The circuit board assembly of claim 1 wherein:

The circuit board includes a first surface on which a plurality of first electronic components are disposed, and at least one of the plurality of first electronic components received in the recess has a height greater than that not accommodated The height of the other first electronic component in the recess.

3. The circuit board assembly of claim 1 wherein:

The circuit board includes a pair of opposite second and third faces, and a plurality of second electronic components and a plurality of third electronic components are disposed on the second surface and the third surface, respectively The height of at least one of the second electronic components received in the recess is greater than the height of the other second electronic component not accommodated in the recess and the height of any one of the third electronic components.

4. A light source device, characterized in that the light source device comprises the circuit board assembly of any of claims 1-3.

5. The light source device according to claim 4, wherein:

The mount is an optical mount for mounting an optical component.

6. The light source device according to claim 5, wherein:

The optical component includes a light source, and the optical support includes a pair of support portions at front and rear ends of the optical path of the light source, the concave portion is located between the pair of support portions, and the pair of support portions and the circuit The board is offset.

7. The light source device according to claim 6, wherein:

The pair of support portions are offset from the circuit board by a screw connection or a screw connection.

8. The light source device according to claim 5, wherein:

The recesses are two, and a hollow protrusion is provided between the two recesses, and a collecting lens is disposed in the hollow protrusion.

9. The light source device according to claim 8, wherein: the optical support comprises:

a light source fixing portion for fixing a plurality of solid-state light sources; a first mirror fixing portion for fixing the first mirror corresponding to at least a portion of the plurality of solid-state light sources; and a fixing portion for fixing at least one of the beam splitting elements a light-splitting element fixing portion, the light emitted by the solid-state light source of the transmitting portion of the light-splitting element and/or unreflected light or/reflecting light reflected by a portion of the first mirror; concentrating light for fixing the condensing lens a lens fixing portion that converges light rays that have passed through the light splitting element, the condensing lens fixing portion arranging the condensing lens in the hollow protrusion; and third for fixing the third mirror a mirror fixing portion and a color wheel fixing portion for fixing the color wheel, the third mirror reflecting the concentrated excitation light to the color wheel to perform wavelength conversion material on the color wheel Excited, the solid state light source is a laser light source or an LED light source.

10. A projection apparatus, characterized in that the projection apparatus comprises the one described in any one of claims 4-9

Light source device.