TWI400555B - Projection module and electronic device - Google Patents

Description

Projection module and electronic device

The present invention relates to a projection module and an electronic device, and more particularly to a projection module and an electronic device in which a lens group is integrated into a base of a light machine.

The projection device can project images on a large screen, so that more people can simultaneously view the content displayed on the screen, so it is often used in public places such as companies and schools. Furthermore, as household display products are moving toward larger sizes, projection devices are becoming more and more popular in general households, becoming an electronic product that is common in modern life.

With the advancement of technology, all kinds of electronic products are moving toward high speed, high efficiency, light and short, and under this trend, portable pico projectors (or mini projectors) have gradually become the future. The mainstream of the personal digital market. In general, the light source of a pico projector uses a light emitting diode or other solid state light source to increase the lumen required by the pico projector, thereby increasing the brightness of the image projected by the pico projector. After the micro projector is made into a finished product, the size of the battery containing the micro projector is about the same as that of a mobile phone on the market, and can even be integrated into a mobile phone, so that it has the advantage of being portable and having no use restrictions.

However, in the current pico projectors, the lens modules of the pico projectors are all designed and integrated on the base of the optical machine. When the focal length of the lens module is adjusted, the lens module is opposite to the base of the optical machine. mobile. Since the shape of the illuminator base and the lens module is complicated, it is not easy to design a mechanism that takes into consideration both the tight state and the smooth movement, so that a gap is easily formed between the lens module and the illuminator base, so that the lens module The dustproofness between the base and the base of the optical machine is not good. Moreover, adjusting the projection focal length causes the lens module to move relative to the base of the optical machine, which is also easy to cause unnecessary visual trouble to the user in appearance.

In addition, in order to achieve the purpose that the lens module can be moved relative to the base of the optical machine during design, the moving space required by the lens module is often reserved on the base of the optical machine, which also makes the micro projection The mobile phone or the mobile phone integrated with this pico projector loses its advantage of being light, thin and short.

The invention provides a projection module which has the function of dustproof.

The present invention provides an electronic device having a slim, short, and simple design.

Other objects and advantages of the present invention will become apparent from the technical features disclosed herein.

In order to achieve one or a part or all of the above or other purposes, an embodiment of the present invention provides a projection module suitable for being disposed in an electronic device. The projection module includes a optomechanical base, a light source, a light valve, a first lens group and a second lens group. The light source and the light valve are disposed on the base of the light machine. The first lens group is fixed on the base of the optical machine. The second lens group is slidably disposed on the base of the optical machine and located between the light valve and the first lens group. The light source is adapted to provide a light beam that is adapted to be emitted sequentially via the light valve, the second lens group and the first lens group.

For one or a part or all of the above or other purposes, an embodiment of the present invention provides an electronic device including a host and a projection module disposed in the host. The projection module includes a optomechanical base, a light source, a light valve, a first lens group and a second lens group. The light source and the light valve are disposed on the base of the light machine. The first lens group is fixed on the base of the optical machine. The second lens group is slidably disposed on the base of the optical machine and located between the light valve and the first lens group. The light source is adapted to provide a light beam that is adapted to be emitted sequentially via the light valve, the second lens group and the first lens group.

Based on the above, in the projection module and the electronic device of the above embodiment, since the second lens group is slidably disposed between the first lens group and the light valve, and the first lens group is fixed on the base of the optical machine, the light is The base of the machine is integrally formed with the first lens group. This makes the projection module and the electronic device structurally dust-proof and has a more compact design in appearance.

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

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. The directional terms mentioned in the following embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only directions referring to the additional schema. Therefore, the directional terminology used is for the purpose of illustration and not limitation.

1 is a block diagram of an electronic device in accordance with an embodiment of the present invention. 2 is a schematic diagram of a projection module in accordance with an embodiment of the invention. 3 is a schematic view of a portion of the projection module of FIG. 2 with a part omitted. Referring to FIG. 1 , in the embodiment, the electronic device 300 is, for example, a mobile phone, and includes a host 200 and a projection module 100 . The projection module 100 is disposed in the host 200 . However, the embodiment does not limit the type of the electronic device 300. Any one that can integrate the projection module 100 can be applied to the embodiment.

Referring to FIG. 2 and FIG. 3 simultaneously, in the embodiment, the projection module 100 includes a optomechanical base 110, a light source 120, a light valve 130, a first lens group 140, and a second lens group 150. The light source 120 and the light valve 130 are disposed on the illuminator base 110. The first lens group 140 is fixed to the illuminator base 110. The second lens group 150 is slidably disposed on the illuminator base 110 and located between the light valve 130 and the first lens group 140. The light source 120 is adapted to provide a light beam that is adapted to be emitted sequentially through the light valve 130, the second lens group 150, and the first lens group 140.

Based on the above, in the projection module 100 and the electronic device 300 of the present embodiment, the second lens group 150 is slidably disposed on the illuminator base 110, and the first lens group 140 and the optomechanical base 110 are integrally formed. The electronic module 300 has a relatively simple appearance, so that the projection module 100 can maintain the function of the focus adjustment and can isolate the dust from the base of the optical machine 110.

For further details, please refer to FIG. 2 and FIG. 3 again. The optical base 110 includes a body 112 and a first lens barrel 114. The first lens barrel 114 is fixed on the body 112, and the first lens group is further described. The 140 is fixed in the first barrel 114. In this embodiment, the first lens barrel 114 and the body 112 can be integrally formed in the production of the optical base 110, in addition to saving the manufacturing process, the optical base 110 and the first lens can be made. Avoid any gaps between groups 140.

On the other hand, the illuminator base 110 further includes a second lens barrel 116. The second lens group 150 is fixed in the second lens barrel 116. The body 112 has a sliding slot 112a. The second lens barrel 116 is slidably disposed on the second lens barrel 116. Inside the chute 112a.

4 is a partial enlarged view of the projection module of FIG. 2 at a first lens group and a second lens group. The optomechanical base 110 is omitted here to enable the structure herein to be clearly identified. Referring to FIG. 2, FIG. 3 and FIG. 4, in the embodiment, the projection module 100 further includes two guiding rods 160 and two sliding blocks 170. The guide rod 160 is fixed in the sliding groove 112a. The slider 170 is fixed to the second barrel 116 and coupled to the guide rod 160. When the slider 170 is coupled with the guide rod 160, the slider 170 moves along the guide rod 160. In other words, the second lens barrel 116 moves relative to the body 112 in the sliding slot 112a by the matching of the guiding rod 160 and the slider 170 to achieve the purpose of adjusting the focal length of the projection module 100. Here, only the two guide bars 160 and the two sliders 170 are described, but the embodiment does not limit the number of the guide bars 160 and the sliders 170.

In addition, the projection module 100 further includes a lever 180 fixed on the second barrel 116 and extending outside the base 110 of the optical machine, so that when the lever 180 is toggled, the lever 180 makes the first The two barrels 116 slide relative to the body 112 to adjust the focal length of the projection module 100.

In summary, in the projection module and the electronic device of the embodiment, the first lens group is fixed on the base of the optical machine, and the second lens group is slidably disposed on the base of the optical machine. In addition to the function of keeping the projection module in focus adjustment, it can also isolate dust from entering the base of the optical machine. At the same time, since the second lens group slides in the sliding groove of the base of the optical machine, the visual appearance of the second lens group does not cause any visual trouble to the user, and thus the electronic device can have a light, short, and simple appearance characteristic.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. In addition, any of the objects or advantages or features of the present invention are not required to be achieved by any embodiment or application of the invention. In addition, the abstract sections and headings are only used to assist in the search of patent documents and are not intended to limit the scope of the invention.

100‧‧‧Projection Module

110‧‧‧Light base

112‧‧‧Ontology

112a‧‧‧Chute

114‧‧‧ first lens barrel

116‧‧‧second lens barrel

120‧‧‧Light source

130‧‧‧Light valve

140‧‧‧First lens group

150‧‧‧second lens group

160‧‧‧guides

170‧‧‧ Slider

180‧‧ ‧bar

200‧‧‧Host

300‧‧‧Electronic devices

1 is a block diagram of an electronic device in accordance with an embodiment of the present invention.

2 is a schematic diagram of a projection module in accordance with an embodiment of the invention.

3 is a schematic view of a portion of the projection module of FIG. 2 with a part omitted.

4 is a partial enlarged view of the projection module of FIG. 2 at a first lens group and a second lens group.

100. . . Projection module

110. . . Optical base

112. . . Ontology

112a. . . Chute

114. . . First barrel

116. . . Second barrel

120. . . light source

130. . . Light valve

140. . . First lens group

150. . . Second lens group

160. . . Guide rod

180. . . Pole

Claims (8)

A projection module is configured to be disposed in an electronic device, the projection module comprising: a light machine base comprising a body, a first lens barrel and a second lens barrel, the body having a sliding slot, the body The first lens barrel is fixed on the body; a light source is disposed on the base of the light machine; a light valve is disposed on the base of the light machine; and a first lens group is fixed on the first lens barrel And a second lens group fixed in the second lens barrel, the second lens barrel is slidably disposed in the sliding slot and linearly movable along the sliding slot relative to the body, the second lens barrel Not rotating relative to the body, and the second lens group is located between the light valve and the first lens group, wherein the light source is adapted to provide a light beam, the light beam being adapted to sequentially pass the light valve, the second The lens group is emitted with the first lens group. The projection module of claim 1, wherein the first lens barrel is integrally formed with the body. The projection module of claim 1, further comprising: a guiding rod fixed in the sliding slot; and a slider fixed on the second lens barrel and being associated with the guiding rod Coupling, when the slider is coupled to the guide, the slider slides along the guide. The projection module of claim 1, further comprising: a lever fixed on the second barrel and extending outside the base of the optical machine to enable the lever to be toggled The lever slides the second barrel relative to the body. An electronic device includes: a host; a projection module disposed in the host, the projection module comprising: a light machine base, comprising a body, a first lens barrel and a second lens barrel, the body The first lens barrel is fixed on the body; a light source is disposed on the base of the light machine; a light valve is disposed on the base of the light machine; a first lens group is fixed In the first lens barrel; and a second lens group fixed in the second lens barrel, the second lens barrel is slidably disposed in the sliding slot and linearly movable along the sliding slot relative to the body The second lens barrel is not rotated relative to the body, and the second lens group is located between the light valve and the first lens group, wherein the light source is adapted to provide a light beam, and the light beam is adapted to sequentially pass through the light source The light valve, the second lens group and the first lens group are emitted. The electronic device of claim 5, wherein the first lens barrel is integrally formed with the body. The electronic device of claim 5, wherein the projection module further comprises: a guiding rod fixed in the sliding slot; and a slider fixed on the second lens barrel, and The guide rod is coupled to slide along the guide rod when the slider is coupled to the guide rod. The electronic device of claim 5, wherein the projection module further comprises: a lever fixed to the second barrel and extending out of the base of the optical machine In addition, when the lever is toggled, the lever slides the second barrel relative to the body.