JP2005084079A - Projection display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a projection display apparatus in which leakage of light from an exhaust port is reduced, enhanced exhaust efficiency is achieved, improved operability by operators is ensured. <P>SOLUTION: The projection display apparatus includes: a projection optical system; a control part which converts an image input and inputs it into the optical system; a casing which holds the optical system and the control part; an exhaust means in which heat from the optical system is discharged at the lower part of the casing; and legs which are located in an exhaust path extending from the exhaust means, support the housing, and have slopes. In the projection type display apparatus, exhaust from the optical system is discharged to the side by the use of the slopes of the legs. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a projection display device in an office, home, store, or the like that uses sound, images, and data, and more particularly to the configuration of an exhaust portion thereof.

  An example of a conventional projection display device is shown in FIG.

  FIG. 4 shows the configuration of a conventional projection display device. The projection display device includes a lens 10, an upper cabinet 11, a circuit board 12, a lower cabinet 13, an exhaust port 14, a fan 15, and legs 16. .

  The projection display device is a screen in which video and signals from a personal computer are converted by a circuit board 12 and an image created by a projection optical system (not shown) is arranged on the front surface of the projection display device via a lens 10; The image is projected onto a projection surface such as a wall, and the user views and presents. At this time, exhaust 17 is performed from the fan 15 through the exhaust port 14 in order to suppress an increase in the in-machine temperature due to heat radiation from the circuit board 12 and the projection optical system.

  However, since the fan 15 is actually mounted, when it is mounted on the side surface, light leakage from the exhaust port may occur, or there may be a problem that warm air of the exhaust hits the operator and causes discomfort. It was.

In addition, the technique regarding the ventilation hole of a projection type display apparatus is also proposed (for example, refer patent document 1).
JP-A-11-316418

  In the exhaust means of the projection display device, reduction of light leakage from the exhaust port, improvement of exhaust efficiency, and improvement of operator operability are required.

  However, with conventional projection display devices, a fan is provided around the casing side surface of the projection display device, so it is difficult to satisfy all of the light leakage reduction from the exhaust port, improvement in exhaust efficiency, and improvement in operator operability. Met.

  An object of the present invention is to obtain a projection display device that can reduce light leakage from an exhaust port, improve exhaust efficiency, and improve operability for an operator.

  In order to solve this problem, the present invention relates to a projection optical system, a control unit that converts image input into the optical system, a housing that holds the optical system and the control unit, and a In the projection display device comprising exhaust means for performing waste heat on the lower part of the casing, and legs that support the casing and are located in the exhaust path from the exhaust means and have inclined portions, the optical system Is exhausted to the side surface by using the inclined portion of the leg portion. In addition, although the leg part has a two-body structure with shaft support, if the leg has an inclined part, it can be configured by a slide method or separately, and the exhaust inclined part can be configured by a projection display device housing. It is also possible to constitute a part of

  As a result, a projection type display device capable of reducing light leakage from the exhaust port, improving exhaust efficiency, and improving the operability for the operator can be obtained.

  As described above, according to the present invention, the exhaust from the optical system is configured to be exhausted to the side surface using the inclined portion of the leg portion, so that light leakage from the exhaust port is reduced, exhaust efficiency is improved, and the operator The advantageous effect that the operability can be improved is obtained.

  Hereinafter, the best mode for carrying out the present invention will be described in detail.

(Embodiment 1)
FIG. 1 shows the configuration of a projection display device according to Embodiment 1 of the present invention. A projection optical system (not shown), a lens 101 for projecting an image of the projection optical system, an upper mold 102, and a circuit board. 103, a lower cavity 104, a fan 105, an exhaust port 106, and a leg 107.

  The projection type display device converts video and signals from the personal computer with the circuit board 103 and arranges the image created by the projection optical system (not shown) on the front surface of the projection type display device via the lens 101, The image is projected onto a projection surface such as a wall, and the user views and presents. At this time, in order to suppress an increase in the in-machine temperature due to heat radiation from the circuit board 103 and the projection optical system, exhaust is performed by changing the exhaust direction from the fan 105 through the exhaust port 106 and by the inclined portion 108 of the leg 107. ing.

  Here, an exhaust port is arranged on the lower surface portion of the housing, and the exhaust of the optical system is exhausted from the exhaust port to the side surface using an inclined portion of the leg portion as an exhaust direction changing guide for changing the direction of the exhaust gas in a substantially horizontal direction. Thus, light leakage from the exhaust port can be reduced, exhaust efficiency can be improved, and operator operability can be improved.

  FIG. 2 shows a rear view of the exhaust means of the present invention, and shows the lower cabinet 104, the fan 105, the exhaust port 106, the leg inclined portion 108, and the exhaust direction 109.

  As can be seen here, the direction of exhaust from the fan is changed to the horizontal direction at the legs, so that light leakage from the exhaust port can be reduced, exhaust efficiency can be improved, and operator operability can be improved.

  In this embodiment, the leg portion also serves as the exhaust direction changing guide, but the leg portion and the exhaust direction changing guide may be separated. Thereby, it is possible to set the projection direction and the exhaust direction best.

  In this embodiment, the exhaust direction is a side surface, but this may be exhausted in the projection direction. Since there is usually no user in the projection direction, it becomes more user-friendly. When exhausting in the projection direction, it is desirable to change the exhaust direction so that the exhaust does not fall below the projection light path. This is to prevent the heat of the exhaust from entering the projection light path, and can prevent distortion of the projection screen. Specifically, in FIG. 1, the exhaust port 106 is left as it is, and the base of the leg 107 on the housing side is installed on the opposite side to the projection direction opposite to the lens 101, and the exhaust is directed to the front by the inclined part 108 of the leg. Try to convert. As a result, the exhaust direction can be changed so that the exhaust does not fall below the projection light path.

  In this embodiment, as shown in the leg portion 107 in FIG. 1, the leg portion that also serves as the exhaust direction changing guide has a bent portion, and the inclination of the housing and the exhaust direction can be changed.

(Embodiment 2)
FIG. 3 shows a configuration 2 of the exhaust means of the present invention, which is composed of an optical system, a lens, upper and lower molds, a circuit board, a fan 105, an exhaust port 106, and a leg 110 configured separately as in the configuration 1. Is done.

  Since the exhaust from the optical system is exhausted to the side surface using the inclined portion of the leg portion, light leakage from the exhaust port can be reduced, exhaust efficiency can be improved, and operator operability can be improved.

  In the above description, the leg portion has a fixed shape, but it goes without saying that it may be assembled to form an inclined portion.

  In the present invention, exhaust from the optical system is configured to be exhausted to the side surface using the inclined portion of the leg portion, so that light leakage from the exhaust port can be reduced, exhaust efficiency can be improved, and operator operability can be improved. Therefore, it is effective for projection display devices in offices, homes, stores, and the like.

The figure which shows the structure of the projection type display apparatus in Embodiment 1 of this invention. The figure which shows the rear surface of the structure of the projection type display apparatus in Embodiment 1 of this invention. The figure which shows the structure of the projection type display apparatus in Embodiment 2 of this invention. The figure which shows the structure of the conventional projection type display apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Lens 11 Upper mold 12 Circuit board 13 Lower mold 14 Exhaust port 15 Fan 16 Leg 17 Exhaust 101 Lens 102 Upper mold 103 Circuit board 104 Lower mold 105 Fan 106 Exhaust port 107 Leg part 108 Leg inclined part 109 Exhaust direction 110 Leg

Claims (4)

A projection display device comprising an exhaust port disposed on a lower surface portion of a housing, and having an exhaust direction changing guide for changing the direction of exhaust from the exhaust port in a substantially horizontal direction. The projection display device according to claim 1, wherein the exhaust direction changing guide also serves as a leg portion that supports the casing. The projection display device according to claim 1, wherein the exhaust direction changing guide changes the direction of the exhaust gas in a substantially projection direction. The projection display device according to claim 1, wherein the exhaust direction changing guide has a bent portion.

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