KR100823794B1 - Projection display device - Google Patents

Abstract

In a projection display that projects an image from a projection lens onto a screen, a light source lamp that is very expensive and has a short lifespan when projecting an image that does not need to be displayed on a screen, such as setting of a projection device main body, by projecting onto a screen. It is not necessary to emit light and the lens cover 4 having a display function such as liquid crystal is used as the lens cover to protect the projection lens 3 for the problem of shortening the life of the light source lamp. The image which does not need screen display was displayed on the lens cover 4, and light emission of the lamp for a light source in that case was made unnecessary.

Description

Projection Display {PROJECTION DISPLAY DEVICE}

The present invention relates to a projection display device using a cover having a display function such as liquid crystal as a lens cover for protecting a projection lens of the projection display device.

Conventionally, a projection display device, such as a projection display device using a display device as a liquid crystal panel, spectroscopy light emitted from a light source lamp and reflected by a reflector into a predetermined color light through a plurality of dichroic mirrors, Each color light is incident on a liquid crystal panel corresponding to the color light of each of R, G, and B through a polarizing beam splitter and modulated into a video signal, and then, each color light is condensed through a dichroic mirror or a dichroic prism and projected. Projected from the lens onto the screen.

In this way, a display device such as a light source lamp, an optical component, a liquid crystal panel, a control board for controlling an image, a power supply board, and the like are housed in a case, and a projection lens is disposed in front of the case to form a projection display device. Doing. In non-operation, the lens is capped on the projection lens to protect the projection lens or is dustproof, or the front cover is covered, and the power is supplied with the lens cap or cover attached. When light is emitted from the lamp for the light source, the light emitted from the projection lens is projected onto the lens cap or cover, and the lens cap or cover is deformed by the heat of the light, or the temperature inside the projection display device is raised to increase the projection display. There is a problem that the life of the device is shortened.

For this countermeasure, it is equipped with a function of detecting the attachment of the lens cap and cutting the lamp power supply (see Patent Document 1, for example), or by supplying a power inlet near the projection lens and supplying power when the lens cap is attached. There exists a shape which cannot be made into it (for example, refer patent document 2).

Alternatively, when checking or changing the setting state of the projection display unit main body on one side, especially when setting the latest high-function and multifunctional projection display device, a menu projected from the projection display device and projected on the screen (menu Many people have a function of performing an operation while watching a screen, and there is a tendency to use a lamp for a light source a lot.

Patent Document 1: Japanese Patent Application Laid-Open No. 2000-112029 (Figures 1 and 2)

Patent Document 2: Japanese Patent Application Laid-Open No. 2002-344848 (Figure 1)

In the technique of Patent Literature 1, since the lamp power supply bar does not enter, there is a problem that the user is unfamiliar with the failure and misunderstanding of the device.

Moreover, in the technique of patent document 2, since the power supply inlet is arrange | positioned at the front side which can also be called the face of a product, there existed a subject that a design became low.

In addition, when setting and confirming the projection display main unit menu is performed on the display screen, there is a problem that only the setting of the projection is necessary and the light source lamp having a high lifetime and a short life time must be used.

Summary of the Invention

A projection display device according to the present invention includes an optical component disposed in a case, a display device for modulating light from the optical component into image light based on an image signal, a projection lens for projecting the image light onto a screen, and the projection lens A projection display device having a lens cover for protecting a lens, wherein the lens cover has a display function for displaying an image based on the image signal from the projection display device, and the lens cover is exposing the projection lens. Only when it is possible to emit the image light from the projection lens.

In addition, the projection display device according to the present invention is characterized in that the lens cover has a touch panel function, and the setting and control of the main body of the projection display device is executed by the touch panel function.

Further, in the projection display device according to the present invention, the lens cover has a remote control function, and is detachably configured from the main body of the projection display device, and the setting and control of the projection display device by the remote control function. It is characterized in that the execution.

Effects of the Invention

According to the projection display device according to the present invention, since the image light can be emitted from the projection lens only when the lens cover is in a position to expose the projection lens, the projection display device can be prevented from being deformed by the heat of the image light. Can extend the lifespan. In addition, by performing a display on the lens cover having a display function that does not require projection on the screen such as the projection display unit main body setting, setting of projection display device projection in that case is unnecessary, and at the same time expensive and life time There is an effect that the image can be displayed without using a short light source lamp.

In addition, according to the projection display device according to the present invention, since the lens cover has a touch panel function, it is possible to easily set and control the main body of the projection display device, and it is not necessary to use buttons for setting and control. have.

Further, according to the projection display device according to the present invention, the lens cover has a remote control function, and is detachably configured from the main body of the projection display device, so that the setting and control of the projection display device can be executed by the remote control function. It works.

1 is a perspective view showing a projection display device according to Embodiment 1 of the present invention;

Fig. 2 is a logic diagram showing the switching of signals of the projection display device according to the first embodiment of the present invention;

3 is a front view showing a part of the projection display device according to the second embodiment of the present invention;

4 is a perspective view showing a projection display device according to Embodiment 3 of the present invention;

Fig. 5 is a perspective view showing a projection display device according to Embodiment 4 of the present invention.

Explanation of symbols for the main parts of the drawings

1: projection display device 2: case

3: Projection lens 4: Lens cover with liquid crystal panel 4a: Liquid crystal panel portion 4b: Lens cover portion

5: binding ring 5b: binding ring

6 convex 7 engaging hole

7a: coupling hole 8: hole

9: shaft 21: ceiling

31: guide 32: handle

41: rotating part 42: rotating part

43: ceiling plate 51a: connector

51b: connector 52: infrared transmitter

Embodiment 1

1 is a perspective view for explaining Embodiment 1 of a projection display device of the present invention. It demonstrates based on FIG. The projection display device 1 generally includes a projection lens 3 in front of a case 2, and includes optical components such as a light source lamp, a reflector, a mirror, and a prism not shown in the case 2. Further, a display device such as a liquid crystal panel that modulates the light from the optical component into the image light based on the image signal is arranged to form an optical path, and the image or the like is projected on the front screen via the projection lens 3. In the projection display device 1 according to the first embodiment, the lens cover for protecting the projection lens 3 in front of the case 2 is a display function for displaying an image by an image signal from the projection display device. And the liquid crystal panel lens cover 4 which attached the liquid crystal panel part 4a to the lens cover part 4b, for example.

On the left side of the lens cover 4 with a liquid crystal panel, an axis 9 is provided for connecting the lens cover 4 with a liquid crystal panel so as to be rotatable, and the lens with a liquid crystal panel is centered around the axis 9. The rotation of the cover 4 makes it possible to expose the projection lens 3 for projection or to cover it for protection.

When covering to protect the projection lens 3, the engaging ring 5a provided on the lens cover 4 with the liquid crystal panel is engaged with the engaging hole 7a on the case 2 side, so that the projection lens 3 is closed. Can be covered and protected. Moreover, when exposing the projection lens 3, the lens cover 4 with a liquid crystal panel is rotated centering on the axis | shaft part 9, and the coupling ring 5 provided in the lens cover 4 with a liquid crystal panel is case. The projection lens 3 can be exposed by engaging and fixing it to the engagement hole 7 on the (2) side.

In addition, the lens cover 4 with a liquid crystal panel is connected to an electrical circuit (not shown) in the case 2 by a card-shaped wiring board or the like, and the image is outputted by the video signal from the electrical circuit. 4a). In addition, the lens cover 4 with the liquid crystal panel is provided with a convex portion 6 for operating the switch inside the case. The lens cover 4 with the liquid crystal panel is rotated to engage the coupling ring 5 on the case 2 side. When engaged with the hole 7, the convex portion 6 for operating the case inside the switch can penetrate through the case 8 for operating the switch inside the case and push the projection lens exposure detection switch (not shown) in the case to operate.

Next, the operation will be described.

When the lens cover 4 with a liquid crystal panel is in the position which covers the projection lens 3, the liquid crystal panel part 4a is in the state which can be visually recognized from the front of the projection apparatus 1, and the electricity in the case 2 The image can be displayed on the liquid crystal panel 4a by the image signal from the circuit, and the display of the setting of the projection device or the image to be displayed from the projection lens can be displayed by test. When the liquid crystal panel portion 4a is a touch panel, the setting input can be executed using the liquid crystal panel portion 4a.

In addition, when the lens cover 4 with the liquid crystal panel is rotated to engage the engagement ring 5 with the engagement hole 7 on the case 2 side, the projection lens 3 is exposed to the position to expose the projection lens 3. The convex part 6 penetrates through the case internal switch operation hole 8 and pushes the projection lens exposure detection switch (not shown) to operate, so that the projection lens exposure detection switch is operated to operate the lens cover 4 with the liquid crystal panel. The image displayed on the liquid crystal panel 4a is projected from the projection lens 3 via the optical component from the lamp for the light source inside the case 2. That is, it is possible to emit image light from the projection lens 3 only when the lens cover 4 with the liquid crystal panel is in a position to expose the projection lens 3, and the lens cover 4 with the liquid crystal panel has a coupling hole. When not engaging with (7), i.e., from the state of engaging with the engaging hole 7a to just before being engaged with the engaging hole 7, the image light is not emitted from the projection lens 3.

Next, an example of logic for switching between displaying an image from the projection lens 3 or displaying an image on the lens cover 4 with a liquid crystal panel will be described based on FIG. 2.

In Fig. 2, when the lens cover 4 with the liquid crystal panel covers the projection lens 3, since the cover open signal 21 from the projection lens exposure detection switch is OFF, the light source lamp ON ( Even if the ON signal 22 is ON, light is not emitted from the projection lens 3, and thus deformation of the lens cover 4 with a liquid crystal panel due to heat can be prevented. At that time, the liquid crystal panel portion display signal 23 is turned ON by performing the setting to cause the liquid crystal panel portion 4a to display, and the liquid crystal panel portion by the video signal from the electric circuit in the case 2. An image can be displayed at 4a.

When the lens cover 4 with the liquid crystal panel is opened, and the engaging ring 5 is engaged with the engaging hole 7 on the case 2 side to the position where the projection lens 3 is exposed, from the projection lens exposure detection switch Of the cover opening signal 21 is turned on, and the image displayed on the liquid crystal panel portion 4a of the lens cover 4 with the liquid crystal panel is taken from the lamp for the light source inside the case 2. At the same time as projected from the projection lens 3 via, the display of the liquid crystal panel portion 4a is turned off.

According to the first embodiment, except that the lens cover 4 with the liquid crystal panel is in a position to expose the projection lens 3, the image is projected from the light source lamp via the optical component in the case 2 via the projection lens 3. Since the lens cover is prevented from being deformed, the life of the projection display device 1 can be extended and the projection on the screen, such as when the projection display device is set up, is not required. Since the image can be started on the liquid crystal panel 4a of the cover 4, the image can be displayed without using a light source lamp which is expensive and has a short lifespan, and has an effect of extending the life of the light source lamp. In addition, by using the touch panel, the buttons for setting can be omitted.

The axis 9 of the lens cover 4 with a liquid crystal panel is not limited to the left side, and may be provided on the right side depending on the installation position of the projection lens. In addition, the coupling between the lens cover 4 and the case 2 with the liquid crystal panel may be made by a coupling ring. For example, the lens cover 4 with the liquid crystal panel may be held at a position where the projection lens is exposed by setting a high magnetic force or a high frictional resistance of the shaft. I wish I could.

Embodiment 2

Fig. 3 is a front view showing the lens cover of Embodiment 2 of the projection display device of the present invention. The same code | symbol is attached | subjected about the structure similar or similar to FIG. 1 explaining Embodiment 1, and description is abbreviate | omitted.

In FIG. 3, the lens cover 4 with the liquid crystal panel is attached to the left and right directions along the guide 32 by applying a force to the handle 31. In the example of FIG. 3, the lens cover 4 is attached to the right direction. Moving it covers the projection lens 3 and moving it to the left exposes it. Of course, depending on the installation position of the projection lens, this direction may be reversed. In addition, although not shown, the lens cover 4 with a liquid crystal panel is held in the position which covers the projection lens 3, and the position which exposes the lens cover 4 with a liquid crystal panel by the latch mechanism similarly to Embodiment 1. A detection switch is provided for detecting the exposure of the projection lens by detecting the position of. Other configurations and operations are omitted because they are the same as in the first embodiment.

According to the first and second embodiments, the liquid crystal panel portion 4a can be viewed from the front regardless of the position of the lens cover 4 with the liquid crystal panel, and therefore, in addition to the effect of the first embodiment, Since the image can be displayed on the liquid crystal panel 4a even if the image is displayed, the display operation of the projection device can be performed from the liquid crystal panel, and the buttons for operation can be omitted.

Embodiment 3

4 is a perspective view for explaining a third embodiment of the projection display device of the present invention. In FIG. 4, the projection display device 1 is substantially the same as that of Embodiment 1, and the same or similar components as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted. A rotating part 41 for connecting the lens cover 4 with a liquid crystal panel to open upward is provided in the case 2 on the upper side of the projection lens 3, and the rotating part 41 is another rotating part. Also connected to 42, the lens cover with a liquid crystal panel is rotatable to the ceiling plate 43 of the projection device 1.

In addition, the lens cover 4 with a liquid crystal panel is provided with a coupling ring 5 for coupling with the case 2 and a convex portion 6 for operating the switch inside the case. On the side of the case 2, a coupling hole 7, a case internal switch operation hole 8, and a case internal switch (not shown) are also provided as in the first embodiment.

When the lens cover 4 with a liquid crystal panel is fixed to the ceiling plate 43, it is fixed so that the liquid crystal panel part 4a may face upward. In that state, the user can perform setting of the projection apparatus or the like by the display of the liquid crystal panel portion 4a.

When the lens cover 4 with a liquid crystal panel is set to a position where the projection lens 3 is exposed on the ceiling plate side, a switch inside the case, not shown in the first embodiment, is operated as in Embodiment 1, and a lamp for a light source inside the case 2 is operated. From this, it becomes possible to project an image from the projection lens 3 via the optical component. At this time, the control of the projection apparatus can also be executed by using the display of the liquid crystal panel portion 4a. In that case, the buttons for controlling the projection display unit main body are displayed on the liquid crystal panel portion 4a. It can function as a button of the touch panel which performs control.

According to the third embodiment, since the lens cover 4 with the liquid crystal panel can be operated in a state of pointing upward to the ceiling plate of the projection display device, the user is not from the front of the projection device 1, but from the front or the rear. It can operate from the, and operability can be improved.

Embodiment 4

Fig. 5 is a perspective view for explaining Embodiment 4 of the projection display device of the present invention, showing a state where the liquid crystal panel portion 4a is separated from the lens cover portion 4b. It demonstrates based on FIG. The projection display device 1 of the fourth embodiment is almost the same as that of the third embodiment, and the same or similar components are denoted by the same reference numerals, and description thereof is omitted. The lens cover 4 with a liquid crystal panel is structurally and electrically connected with the liquid crystal panel part 4a and the connector 51a, 51b which can be inserted and taken out by the lens cover part 4b. In addition, the liquid crystal panel portion 4a is provided with a function for starting a control signal such as the infrared ray transmitting portion 52 and a battery for driving alone so as to enable remote operation as a remote controller.

The operation for exposing the projection lens 3 by the lens cover portion 4b is the same as that in the third embodiment, but the projection type is applied to the liquid crystal panel portion 4a by separating the liquid crystal panel portion 4a from the lens cover portion 4b. Buttons for setting and controlling the display main body are displayed. At this time, the liquid crystal panel portion 4a is driven by a built-in battery. The user can remotely operate the projection display device by the separated liquid crystal panel 4a. Since other configurations and operations are the same as those in the third embodiment, description is omitted.

According to the fourth embodiment, since it is not necessary to separately attach the remote controller for controlling the main body to the projection display device 1, a significant cost reduction is possible, and the liquid crystal panel unit 4a serving as the remote controller is provided with a projection display device. Since it can be stored on the main body, there is no worry of losing the remote controller.

In Embodiment 4, although the liquid crystal panel part 4a was made into the wireless remote controller which employ | adopted infrared rays etc., the method of transmitting a signal by wire may be sufficient.

In each of the above embodiments, the lens cover is provided with a liquid crystal panel. However, it is not the liquid crystal panel but is the same as long as the display can be miniaturized such as a plasma display panel, an LED, and an electroluminescence (EL). The effect is clear.

The lens cover may not be fixed to the case when the lens is exposed, but may be connected to the main body by a cord for transmitting a video signal from the display device or the like.

The projection display device of the present invention can be used for a display device such as a projector.

Claims (3)

An optical component disposed in the case, A display device for modulating the light from the optical component into video light based on a video signal; A projection lens for projecting the image light onto a screen; A projection display device having a lens cover for protecting the projection lens, The lens cover has a display function for displaying an image based on the image signal from the projection display device, and can emit image light from the projection lens only when the lens cover is exposing the projection lens. Characterized by Projection display. The method of claim 1, The lens cover has a touch panel function, and performs setting and control of the projection display device main body by the touch panel function. Projection display. The method according to claim 1 or 2, The lens cover has a remote control function, is configured to be detachable from the main body of the projection display device, and performs setting and control of the projection display device by the remote control function. Projection display.

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