TWI405025B - Projector - Google Patents

Abstract

The invention discloses a projector which includes a casing and a first heat source, a second heat source, a first fan, a second fan and a first guiding member. The first fan includes an air-inlet side, an air-outlet side and a lateral side. The air-outlet side is close to the edge of the casing. An opening is disposed on the lateral side and adjacent to the air-inlet side and the air-outlet side. The first fan generates a first airflow flowing through the second heat source and exhausted to the outside of the projector through the air-outlet side. Moreover, the second fan generates a second airflow flowing through the first heat source. The first guiding member, disposed adjacent to the first heat source, is used for guiding the second airflow from the first heat source to the opening on the lateral side of the first fan.

Description

Projector

The present invention relates to a projector.

In conferences, movie viewings, exhibitions, etc., projectors are often used to project presentations, movies, images, etc. onto the screen. Currently, projectors on the market mainly include projection technologies such as three-chip liquid crystal projection (3LCD), digital light processing (DLP), and liquid crystal on silicon (LCoS). Although the separation and projection principles of these projection technologies are different, most of them use a high-voltage halogen lamp or a mercury bulb as a white light source, and then separate the white light into R, G through a dichroic mirror, a panel or a color wheel. B three primary colors. In addition, as users demand more and more "portability", projectors that use traditional light bulbs instead of traditional light bulbs as light sources have been introduced on the market as one of the solutions for miniaturization of projectors. .

Referring to FIG. 1 , FIG. 1 is a schematic plan view of a prior art projector 9 . As shown in FIG. 1, the projector 9 mainly comprises a casing 90, a lamp cover 91, a light source 93 (such as the aforementioned high-voltage halogen lamp, a high-pressure mercury bulb, a light-emitting diode), an optical engine 95, a first fan 97, and a second fan. 99. The light source 93 is fixed in the lamp cover 91, and the lamp cover 91 is fixed in the retaining wall 900 on the casing 90. In addition, the light emitted by the light source 93 acts through the optical elements in the optical engine 95 to produce a high brightness, high contrast projection beam.

The first fan 97 generates an air flow (as indicated by the solid arrows) and directs the air flow through the flow guiding element 970 into the lamp housing 91 so that a portion of the air flow can be blown toward the light source 93 to carry away the thermal energy generated by the light source 93. In addition, the hot air flow passing through the light source 93 is blocked by the retaining wall 900, and thus collects to the lower right corner of the retaining wall 900, and then flows out from the notch 902 on the retaining wall 900. The second fan 99 is disposed outside the retaining wall 900 corresponding to the notch 902 for attracting the hot airflow and discharging the hot airflow out of the casing 90. By the cooperation of the first fan 97, the flow guiding element 970, the retaining wall 900 and the second fan 99, the heat energy generated by the light source 93 can be discharged to prevent the light source 93 from being burnt due to overheating.

However, since there is a gap between the retaining wall 900 and the lamp cover 91 and the second fan 99, hot air flow may be dissipated from these gaps (as indicated by the dashed arrows) and flow into the casing 90. These unexhausted hot air streams may damage the electronic components within the projector 9 due to the high heat.

Accordingly, it is an object of the present invention to provide a projector that solves the problems of the prior art.

According to an embodiment of the invention, the projector comprises a casing and a first heat source, a second heat source, a first fan, a second fan and a first flow guiding element disposed in the casing. The first fan includes an air inlet surface, an air outlet surface, and a side surface. Wherein, the air outlet surface is adjacent to the edge of the casing, and the side surface has an opening and is adjacent to the air inlet surface and the air outlet surface. The first fan generates a first airflow through the second heat source, and the first airflow is discharged to the outside of the projector via the air outlet surface. The second fan generates a second airflow through the first heat source. The first flow guiding element is adjacent to the first heat source for guiding the second airflow flowing through the first heat source to the opening, and then discharged from the air outlet surface of the first fan to the outside of the projector.

According to another embodiment of the present invention, the projector includes a casing and a light source module disposed in the casing, the first fan, and the first flow guiding element. The light source module includes a lamp cover and a first heat source located in the lamp cover. The first fan includes an air inlet surface, an air outlet surface, and a side surface. Wherein, the air outlet surface is adjacent to the edge of the casing, and the side surface has an opening and is adjacent to the air inlet surface and the air outlet surface. The first flow guiding element is adjacent to the lamp cover for guiding the airflow around the first heat source to the opening, and then discharged from the air outlet surface of the first fan to the outside of the projector.

According to still another embodiment of the present invention, the projector includes a casing and a first heat source, a first fan, and a first flow guiding element disposed in the casing. As mentioned above, the first fan includes an air inlet surface, an air outlet surface, and a side surface. Wherein, the air outlet surface is adjacent to the edge of the casing, and the side surface has an opening and is adjacent to the air inlet surface and the air outlet surface. In addition, the first flow guiding element is adjacent to the first heat source for guiding the airflow around the first heat source to the opening, and then discharged from the air outlet surface of the first fan to the outside of the projector.

In summary, by the arrangement of the first flow guiding element, the projector of the present invention can guide the hot air flow flowing through the internal heat source to the opening on the side of the fan, and directly discharge through the fan, thereby improving heat dissipation efficiency and avoiding The hot air flow flows inside the projector, thereby preventing the light source or other electronic components in the projector from being damaged by high heat.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

The invention provides a projector comprising a casing and a first heat source, a first fan and a first flow guiding element disposed in the casing. The first fan includes an air inlet surface, an air outlet surface, and a side surface. The air outlet surface is adjacent to the edge of the casing, and the side surface has an opening and is adjacent to the air inlet surface and the air outlet surface. In particular, the first flow guiding element is adjacent to the first heat source for guiding the airflow around the first heat source to the opening and directly discharged from the air outlet surface of the first fan to the outside of the projector.

In practical applications, the projector of the present invention may include more than one heat source, and the heat source may be a light source module, a voltage regulator module, or other components. Hereinafter, an embodiment of the projector of the present invention will be described using a light source as a first heat source and a lampshade as a second heat source.

Referring to FIG. 2, a schematic plan view of a projector 1 according to an embodiment of the present invention is shown. As shown in FIG. 2, the projector 1 includes a casing 10, a lampshade 11, a light source 13 (such as the aforementioned high-voltage halogen lamp, high-pressure mercury bulb, and light-emitting diode), an optical engine 14, a first fan 16, and a first diversion flow. Element 17, second fan 18 and second flow guiding element 19. The lampshade 11 and the light source 13 constitute a light source module of the projector 1 .

A retaining wall 100 is disposed on the inner surface of the casing 10, and a plurality of notches 102 are formed in the retaining wall 100. The lampshade 11 is disposed within the retaining wall 100 and is surrounded by the retaining wall 100. The light source 13 is disposed in the globe 11 and is located substantially at the center of the globe 11. The optical engine 14 includes a plurality of sets of polarization, splitting, and filtering elements for processing the light emitted by the light source 13 to produce a projected image. For example, the optical engine may include a transmissive liquid crystal display panel, a reflective digital optical processor, a digital micromirror device (DMD), a germanium substrate liquid crystal display element, and polarization spectroscopy (PBS). ), band pass filter (BPF), UV-IR filter, etc.

Referring to FIG. 3A together, a perspective view of the first fan 16 according to an embodiment of the present invention is shown. The first fan 16 is disposed on the inner surface of the casing 10 and adjacent to the side wall of the casing 10. Further, the first fan 16 includes an air inlet surface 16a, an air outlet surface 16b, and a side surface 16c. The windward surface 16b is adjacent to the edge of the casing 10, and the side surface 16c has an opening 162 adjacent to the air inlet surface 16a and the air outlet surface 16b. Further, the first fan 16 generates airflows F3, F4 flowing through the globe 11, and is discharged to the outside of the projector 1 via the air outlet surface 16b.

The second fan 18 is disposed adjacent to the lamp cover 11 and generates airflows F1, F2. In addition, the second flow guiding element 19 is a flexible air guiding channel, which is respectively connected to the second fan 18 and the lamp cover 11 , and the interfaces at both ends thereof are respectively aligned with the front surface of the second fan 18 and the air inlet of the lamp cover 11 (not Shown in the picture). Thereby, the second flow guiding element 19 can guide the airflows F1, F2 through the air inlet to the inside of the lampshade 11 and flow through the light source 13 to cool the light source 13. In this embodiment, the temperatures of the airflows F1, F2 are greater than the temperatures of the airflows F3, F4.

In practice, the projector 1 of the present invention may further comprise a generally funnel-shaped hood having a larger outer end covering the front surface of the second fan 18 and a second flow guiding element 19 nested in the hood. The smaller end. Thereby, the air flow generated by the second fan 18 can be completely entered into the lamp cover 11 via the second flow guiding element 19.

In addition, in practice, the projector of the present invention does not have to include the second flow guiding element, and the position and direction of the second fan can be adjusted so that the generated airflow can be directly blown to the heat source.

In addition, the first flow guiding element 17 is respectively connected to the lamp cover 11 and the first fan 16 , and the interfaces at both ends thereof are respectively aligned with the air outlets (not shown in the figure) on the lamp cover 11 and the frame 160 of the first fan 16 . Opening 162. Thereby, the first flow guiding element 17 can guide the airflows F1 and F2 inside the lampshade 11 to the opening 162 through the air outlet, and then the airflow F1 and F2 are directly discharged to the projector 1 through the airflow surface 16b by the first fan 16. In addition, it is avoided that the higher temperature airflows F1, F2 directly contact the fan center of the first fan 16, causing damage to the electronic components in the fan center of the first fan 16.

Referring to FIG. 3B again, a perspective view of the first fan 16 according to another embodiment of the present invention is shown. As shown in FIG. 3B, in the embodiment, the opening 162 on the side 16c of the first fan 16 is further provided with a plurality of baffles 164 for guiding the directions of the airflows F1, F2. In practical applications, the angle of the deflector 164 may be adjusted as appropriate so that the faster the airflows F1, F2 can be discharged by the first fan 16, the better.

In the present embodiment, the first flow guiding element 17 is a flexible air duct that can provide a supporting force from the retaining wall 100. In practice, the flexible air duct is a pipe made of an elastic material such as rubber or plastic. In addition, the second flow guiding element 19 can also be a flexible air guiding duct made of an elastic material.

Referring to FIG. 4A and FIG. 4B, FIG. 4A and FIG. 4B respectively show schematic diagrams of the first flow guiding element 17 combined with the first fan 16 according to the present invention. As shown in FIG. 4A, the first flow guiding member 17 is adhesively fixed to the frame 160 of the first fan 16 with an adhesive 20. In practice, the choice of adhesive 20 may vary depending on the material of the first flow guiding element 17, and is not limited to any particular adhesive 20. Further, as shown in FIG. 4B, the first flow guiding member 17 is locked to the frame 160 of the first fan 16 by screws 22. In practice, the other end of the first flow guiding element 17 may also be secured to the globe 11 by an adhesive 20, a screw 22, or otherwise. Moreover, in practice, the second flow guiding element 19 can also be secured to the globe 11 and the second fan 18 by an adhesive, screw or otherwise.

In practical applications, the flow rate of the exhaust airflow of the first fan 16 per unit time is greater than the flow rate of the airflow generated by the second fan 18. In other words, the amount of exhaust of the first fan 16 is greater than the amount of gas produced by the second fan 18, thereby enhancing the flow velocity of the airflow in the globe 11, to improve the heat dissipation efficiency of the light source 13, and achieving a better cooling effect.

In addition, in practical applications, the projector of the present invention may include a plurality of first flow guiding elements respectively disposed at different positions on the lamp cover, and the side faces of the first fan may also include other corresponding openings, so that the inside of the lamp cover The hot air flow can simultaneously flow through the different first flow guiding elements to the first fan. Alternatively, the projector of the present invention may also include a plurality of first fans corresponding to the plurality of first flow guiding elements to speed up the discharge of the hot gas stream.

Referring again to FIG. 5, a schematic plan view of a projector according to an embodiment of the present invention is shown. As shown in FIG. 5, the projector 1 in this embodiment also includes a casing 10, a lamp cover 11, a light source 13, an optical engine 14, a first fan 16, a first flow guiding element 17, a second fan 18, and a second. Flow guiding element 19.

Different from FIG. 2, two shutters 110a and 110b are disposed in the lampshade 11 of the projector 1 in the embodiment, which are respectively adjacent to the air inlet and the air outlet of the lampshade 11, that is, respectively located in the first guide. The flow element 17 and the second flow guiding element 19 are adjacent to each other. The baffle 110a can guide the airflows F1, F2 generated by the second fan 18 into the lampshade 11 from the second flow guiding element 19, and the baffle 110b can direct the airflows F1, F2 from the inside of the lampshade 11 into the first flow guiding element 17.

By the arrangement of the baffles 110a, 110b, airflow can be prevented from being lost from the front end of the lamp cover 11 to the inside of the projector 1. In addition, when the projector uses a bulbous bulb (shown in Figure 5) as the light source, the rear half of the bulb is farther from the air inlet, making the airflow less likely to blow toward the rear half of the bulb, by the setting of the baffles 110a, 110b. It can also increase the air flow through the rear half of the bulb to improve the heat dissipation efficiency of the bulb. In practice, the baffles 110a, 110b may be present separately and need not be provided at the same time.

In summary, by the arrangement of the first flow guiding element, the projector of the present invention can guide the hot air flowing through the internal heat source to the opening on the side of the fan, and directly discharge through the fan, thereby improving the heat dissipation efficiency. First, to avoid the flow of hot air inside the projector, thereby preventing the light source or other electronic components in the projector from being damaged by the high heat; secondly, the airflow with higher temperature can be prevented from directly contacting the fan center of the fan, resulting in a fan. The electronic components in the fan center are damaged. It should be noted that the flow guiding component and the fan of the present invention can also be used to dissipate heat from other heat sources inside the projector, and are not limited to the light source and the lamp cover as exemplified above.

The features and spirit of the present invention will be more apparent from the detailed description of the preferred embodiments. On the contrary, the intention is to cover various modifications and equivalents within the scope of the invention as claimed. Therefore, the scope of the patented scope of the invention should be construed as broadly construed in the

1, 9. . . Projector

10, 90. . . cabinet

100, 900. . . Retaining wall

102, 902. . . gap

11, 91. . . lampshade

110a, 110b. . . Baffle

13, 93. . . light source

14, 95. . . Optical engine

16, 18, 97, 99. . . fan

16a. . . Wind inlet

16b. . . Wind face

16c. . . side

162. . . Opening

164. . . Deflector

17, 19, 970. . . Diversion element

20. . . Adhesive

twenty two. . . Screw

F1, F2, F3, F4. . . airflow

1 is a schematic plan view of a prior art projector.

2 is a schematic plan view of a projector according to an embodiment of the present invention.

FIG. 3A and FIG. 3B respectively are schematic perspective views of a first fan according to an embodiment of the present invention.

4A and 4B are schematic views respectively showing the combination of the first flow guiding element and the first fan according to the present invention.

Figure 5 is a schematic plan view of a projector in accordance with an embodiment of the present invention.

1. . . Projector

10. . . cabinet

100. . . Retaining wall

102. . . gap

11. . . lampshade

13. . . light source

14. . . Optical engine

16, 18. . . fan

16a. . . Wind inlet

16b. . . Wind face

16c. . . side

17,19. . . Diversion element

F1, F2, F3, F4. . . airflow

Claims (20)

A projector includes: a casing; a first heat source disposed in the casing; a second heat source disposed in the casing; a first fan disposed in the casing, the first fan The air inlet surface, a wind surface and a side surface, wherein the air outlet surface is adjacent to the edge of the casing, and the side surface has an opening adjacent to the air inlet surface and the air outlet surface, the first The fan generates a first airflow through the second heat source, the first airflow is discharged to the outside of the projector through the air outlet surface, and a second fan is configured to generate a second airflow to flow through the first heat source; A first flow guiding element is disposed in the casing and adjacent to the first heat source for guiding the second airflow flowing through the first heat source to the opening. The projector of claim 1, wherein the second heat source is a lamp cover, and the first heat source is located in the lamp cover. The projector of claim 2, further comprising: a second flow guiding element connecting the second fan and the lamp cover for guiding the first airflow to the inside of the lampshade. The projector of claim 3, wherein the lamp cover further comprises a first baffle and a second baffle, wherein the first baffle is adjacent to the first flow guiding element for guiding the first The airflow enters the first flow guiding element, and the second baffle is adjacent to the second flow guiding element for guiding the first airflow into the interior of the lampshade. The projector of claim 1, wherein the temperature of the second air stream is greater than the temperature of the first air stream. A projector comprising: a casing; a light source module comprising a lamp cover and a first heat source, the light source module being disposed in the casing; a first fan disposed in the casing, the first The fan includes an air inlet surface, an air outlet surface and a side surface, wherein the air outlet surface is adjacent to the edge of the casing, and the side surface has an opening adjacent to the air inlet surface and the air outlet surface; The first flow guiding element is disposed in the casing and adjacent to the lamp cover for guiding an airflow around the first heat source to the opening. The projector of claim 6, wherein the lamp cover further comprises: a first baffle adjacent to the first flow guiding element for guiding the airflow into the first flow guiding element. The projector of claim 6, wherein the first fan generates a second airflow flowing through the outside of the lampshade, and the second airflow is discharged to the outside of the projector via the air outlet surface. The projector of claim 8, further comprising: a second fan disposed in the casing adjacent to the lamp cover for generating a first airflow; and a second flow guiding component connected to the The second fan and the lamp cover are configured to guide the first airflow to the inside of the lampshade. The projector of claim 9, wherein the lamp cover further comprises: a second baffle adjacent to the second flow guiding element for guiding the first airflow into the interior of the lampshade. The projector of claim 9, wherein the temperature of the second air stream is greater than the temperature of the first air stream. The projector of claim 8, further comprising: a second fan disposed in the casing adjacent to the lamp cover for generating a first airflow to the first heat source. The projector of claim 12, wherein the temperature of the second air stream is greater than the temperature of the first air stream. A projector includes: a casing; a first heat source disposed in the casing; a first fan disposed in the casing, the first fan including an air inlet surface, an air outlet surface and a a side surface, wherein the air outlet surface is adjacent to the edge of the casing, and the side surface has an opening adjacent to the air inlet surface and the air outlet surface; and a first flow guiding element is disposed in the casing And directing a flow of air around the first heat source to the opening. The projector of claim 14, further comprising: a first baffle adjacent to the first heat source and the first flow guiding element for guiding the airflow into the first flow guiding element. The projector of claim 14, further comprising: a second fan disposed in the casing adjacent to the first heat source for generating a first airflow to the first heat source. The projector of claim 16, further comprising: a second flow guiding element connecting the second fan and the first heat source for guiding the first airflow around the first heat source. The projector of claim 17, further comprising: a lamp cover, the first heat source is disposed in the lamp cover; and a second baffle adjacent to the second flow guiding element and the first heat source And guiding the first airflow around the first heat source in the lampshade. The projector of claim 18, wherein the first fan generates a second airflow through the lampshade, and the second airflow is discharged to the outside of the projector via the air inlet surface and the air outlet surface. The projector of claim 19, wherein the temperature of the first heat source is greater than the temperature of the lamp cover.