JP2007212619A - Projection-type image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection-type image display device capable of quickly displaying images with less time and effort, when displaying the image of a memory card slot or displaying the image by connecting a computer signal to an RGB input terminal. <P>SOLUTION: The device includes a microcomputer 5, having the function of detecting the insertion of an SD card and the presence or absence of an image file within the SD card. When the insertion of the SD card or the presence of the image file in the SD card is detected, a power source is switched on, thereby turning on a light 6, and also automatically selecting and displaying the SD card slot 1 as an input terminal, regardless of which input terminal has been selected when the power source previously used is turned off. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention provides a projection type image such as a projector having a memory card slot into which a memory card storing an image file is inserted and a plurality of image input terminals such as a video terminal and a Dsub 15 pin terminal (hereinafter simply referred to as RGB input terminal). The present invention relates to a display device.

  In recent years, projectors using liquid crystal or DMD (digital micromirror device), which are projection type image display devices, can display a large screen image while being small and light, and thus many products have been put on the market from various companies.

  Recently, a projector that is equipped with a memory card slot corresponding to a memory card such as an SD card (Secure Digital memory card) and that projects and displays images stored in the memory card inserted in the memory card slot has been commercialized. , Store the presentation material for sales on the SD card and visit the other party with the projector, give a presentation on the spot, or save the presentation material for sales on the notebook PC and visit the other party with the projector, It is often used such as giving presentations on the ground.

  Since it is used for such applications, there is a growing demand for projectors that can make smart presentations with quick setup.

  As a method corresponding to these, for example, Patent Document 1 introduces a method of automatically detecting an image in a memory card by detecting that a memory card is inserted into a memory card slot.

In Patent Document 2, an input signal from a computer is sequentially recorded on a memory card in a memory card slot equipped in the projector, and when the same data is displayed next time, an image can be quickly displayed by selecting the data on the memory card. How to display is introduced.
JP 2004-326253 A JP 2000-66646 A

  However, a projector usually has a plurality of image input terminals such as a video terminal, an RGB input terminal, and a BNC terminal in addition to a memory card slot, and a lamp for projecting an image onto a screen or the like outside the apparatus main body. With respect to the method of Patent Document 1 and the method of Patent Document 2 in the prior art, when the lamp is lit and the memory card slot is selected as the input terminal to be displayed, Although effective, when performing a presentation as sales, bring the projector to the other party and turn on the lamp to turn on the lamp. It is not always possible to remember whether the Check the currently selected input terminal on the display, etc., and if a memory card slot other than that is selected, execute the second step of selecting the memory card slot by operating the remote control or control panel. After that, the memory card is inserted and the image is displayed.

  As described above, in the current method, the projector requires a certain amount of labor and time for the first and second steps.

  Hereinafter, this problem will be described in more detail with reference to the drawings.

  First, consider the general operation when a user projects and displays an image on a memory card.

  FIG. 6 is a flowchart showing an operation until a user projects and displays an image on a memory card in a conventional projector.

  As shown in FIG. 6, first, the first step of turning on the AC power to the projector to put it in the standby state, the second step of lighting the lamp, and the input terminal currently selected on the on-screen etc. are confirmed. When an input terminal other than the memory card slot is selected, the third step of switching to select the memory card slot as the input terminal by operating the remote control or the control panel, and the memory card as a memory card Four steps of the fourth step to be inserted into the slot are necessary, and it takes time and a certain amount of time for operation.

  In addition, the projector usually remembers which input terminal was selected when the power was turned off the last time it was used, and is designed to select the same input terminal when the power is turned on. It does not always remember which input terminal was used, and when one projector is used by multiple users, it is unknown which input terminal was selected by the previous user. , You have to check the current input terminal on the screen etc. after turning on the power, and then switch to select the memory card slot as the input terminal by operating the remote control or control panel etc. there were.

  Next, consider the general operation when the user connects the notebook PC image to the RGB input terminal of the projector for projection display.

  FIG. 7 is a flowchart showing an operation from when the user connects an image of the notebook PC to the RGB input terminal to project and display the image.

  As shown in FIG. 7, first of all, the first step of turning on the AC power and setting the standby state, the second step of turning on the lamp, and the input terminal currently selected on the on-screen or the like are confirmed, When an input terminal other than the RGB input terminal is selected, the third step of switching to select the RGB input terminal by operating the remote control or the control panel and the image signal of the notebook PC are externally output. Four steps, the fourth step, is required to set the mode or the mode to output both internally and externally (hereinafter simply referred to as the external monitor mode), and it takes time and a certain amount of time. It was.

  Also in this case, it is not always remembered which input terminal the user used last time, and when one projector is used by multiple users, which input the previous user Since it is unknown whether the terminal has been selected, turn on the power and check the current input terminal on-screen, etc., and then operate the remote control or control panel to select the RGB input terminal as the input terminal There was annoyance that had to be switched to.

  In consideration of the above-described problems, the present invention displays an image quickly and with little effort when displaying an image in a memory card slot or when displaying an image by connecting a computer signal to an RGB input terminal. An object of the present invention is to provide a projection-type image display device that can perform the above-described operation.

In order to solve the above-described problems, the first aspect of the present invention includes a memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, the memory card slot, and the image input terminals. An image display device that displays the image signal of the image as an image, a lamp for projecting the image displayed on the image display device to the outside of the apparatus main body, and an image signal from the memory card slot and the image input terminal A selection circuit for switching and supplying to the image display device, a control circuit for controlling switching of the selection circuit and lighting of the lamp, and detecting that a memory card is inserted in the memory card slot, and A card detection unit for sending a detection signal to the circuit, and the control circuit In the standby state, the lamp is turned on and the image signal from the memory card slot is supplied to the image display device based on the input result of the detection signal for detecting that the memory card is inserted into the memory card slot. A projection-type image display device for controlling the switching destination of the selection circuit as described above,
According to a second aspect of the present invention, a memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, and image signals from the memory card slot and the image input terminals are displayed as images. An image display device, a lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and an image signal from the memory card slot and the image input terminal are selectively switched to select the image display device. A selection circuit for supplying to the card, a control circuit for controlling switching of the selection circuit and lighting of the lamp, and a card for detecting that a memory card has been inserted into the memory card slot and sending a detection signal to the control circuit And the control circuit, in the projection state of the lamp, the memory When a detection signal indicating that a memory card has been inserted into the memory card slot is input, the memory circuit regardless of whether the selection circuit is currently selecting the memory card slot or the image input terminal. A projection-type image display device for controlling the selection circuit so as to supply an image signal from a card slot to an image display device;
According to a third aspect of the present invention, a memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, and image signals from the memory card slot and the image input terminals are displayed as images. An image display device, a lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and an image signal from the memory card slot and the image input terminal are selectively switched to select the image display device. And a control circuit that controls switching of the selection circuit and lighting of the lamp, and the control circuit is a memory card inserted into the memory card slot in a standby state of the apparatus main body. If there is an image file in the file, or an image file that can be displayed A projection-type image display device that controls the selection circuit to turn on the lamp and supply an image signal from the memory card slot to the image display device in at least one of the cases where it is determined that the image is present And
According to a fourth aspect of the present invention, a memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, and image signals from the memory card slot and the image input terminals are displayed as images. An image display device, a lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and an image signal from the memory card slot and the image input terminal are selectively switched to select the image display device. And a control circuit that controls switching of the selection circuit and lighting of the lamp, and the control circuit is provided in the memory card inserted in the memory card slot in the projection state of the lamp. If there is an image file on the In at least one of when it is determined that that is a projection type image display device that controls the switching destination of the selection circuit so as to supply the image signal from the memory card slot in an image display device,
According to a fifth aspect of the present invention, there is provided an RGB input terminal to which an image signal is input, at least one image input terminal other than the RGB input terminal, an image input terminal other than the RGB input terminal and the RGB input terminal. An image display device that displays an image signal as an image, a lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, an image input terminal other than the RGB input terminal and the RGB input terminal A selection circuit for selectively switching image signals to supply to the image display device; a control circuit for controlling switching of the selection circuit and lighting of the lamp; and a plug-and-connect connected to the RGB input terminal and the control circuit A play memory and a plug and plug that detects a communication signal from the RGB input terminal to the plug and play memory. And the control circuit, in a standby state of the apparatus body, turns on the lamp based on a detection result of a communication signal from the RGB input terminal to the plug and play memory, and A projection-type image display device that controls to supply an image signal from an RGB input terminal to an image display device,
According to a sixth aspect of the present invention, an RGB input terminal to which an image signal is input, at least one image input terminal other than the RGB input terminal, and the image input terminals other than the RGB input terminal and the RGB input terminal. An image display device that displays an image signal as an image, a lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, an image input terminal other than the RGB input terminal and the RGB input terminal A selection circuit for selectively switching image signals to supply to the image display device; a control circuit for controlling switching of the selection circuit and lighting of the lamp; and a plug-and-connect connected to the RGB input terminal and the control circuit A play memory and a plug and plug that detects a communication signal from the RGB input terminal to the plug and play memory. The control circuit is configured to output an image signal from the RGB input terminal based on a detection result of a communication signal from the RGB input terminal to the plug and play memory in the projection state of the lamp. A projection-type image display apparatus that is controlled to be supplied to an image display device is provided.

As described above, according to the present invention, an image display device equipped with a memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, and a lamp for projecting an image. In, when projecting and displaying the image of the memory card, it is possible to display the image quickly and with less effort.
Alternatively, a projector equipped with a plurality of input terminals and a lamp for projecting an image can display an image quickly and with little effort when an image is displayed by connecting a computer signal to the RGB input terminal. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
First, the image display apparatus according to the first embodiment of the present invention will be described.

  FIG. 1 is a diagram showing a schematic configuration of a projector that is an image display apparatus according to Embodiment 1 of the present invention. 1 is an SD card slot into which an SD card storing an image file is inserted, 2 is a Video input terminal, 3 is an RGB input terminal, 4 is a selection circuit that selectively switches one signal from the signals of the SD card slot 1, Video input terminal 2, and RGB input terminal 3 and supplies the signal to the liquid crystal panel 7, and 5 is a selection circuit 4 is a microcomputer for projecting an image onto a screen or the like outside the apparatus main body, and 8 is an image formed by radiated light from the lamp 6 passing through the liquid crystal panel 7. Is a projection lens that projects An SD card insertion detection signal (hereinafter simply referred to as a detection signal) from the card detection unit 11 of the SD card slot 1 is connected to the microcomputer 5.

  The operation of the projector according to the present embodiment configured as described above will be described with reference to the flowchart of FIG.

  Normally, when a user uses a projector, first, AC power is turned on to enter a standby state. At this time, the microcomputer 5 of the projector displays which input terminal of the SD card slot 1, the video input terminal 2, and the RGB input terminal 3 was selected by the selection circuit 4 when the power was turned off last time, that is, an image of which input terminal. Is read from a memory (not shown).

  In this example, it is assumed that the Video input terminal 2 was selected when the power was turned off last time.

  Here, a user who wants to display an image on the SD card inserts the SD card into the SD card slot 1.

  A detection signal for detecting that an SD card is inserted is supplied from the card detection unit 11 of the SD card slot 1 to the microcomputer 5.

  The microcomputer 5 detects that the SD card has been inserted into the SD card slot 1 based on the detection signal, turns on the lamp 6, and selects the video signal input from the video input terminal 2 to the liquid crystal panel 7. The circuit 4 is controlled to supply the image signal of the SD card slot 1 to the liquid crystal panel 7.

  Radiant light from the lamp 6 is transmitted through the liquid crystal panel 7 to form an image, and is enlarged and projected on a screen (not shown) by the projection lens 8.

  A user who wants to project an image on the SD card can display the image simply by inserting the SD card into the SD card slot 1 of the projector installed in the standby state, and operates the remote control or the control panel. Display the image with quick and few operations without having to switch on the input terminal by operating the remote control or control panel after confirming the operation to turn on the lamp or the currently selected input terminal on the screen etc. can do.

  In the present embodiment, the case where the SD card is inserted into the projector in the standby state has been described. However, for example, an image signal from the Video input terminal 2 is projected and displayed on the projector in the lamp lighting state. When the SD card is inserted into the SD card slot 1 of the projector, the detection signal from the SD card slot 1 is supplied to the microcomputer 5, and the microcomputer 5 selects to supply the image signal of the Video input terminal 2 to the liquid crystal panel 7. An operation of supplying the image signal of the SD card slot 1 to the liquid crystal panel 7 by controlling the selected selection circuit 4 is also possible.

  As a result, a user who wants to project an image on the SD card can display the image on the SD card only by inserting the SD card into the SD card slot 1 of the projector in the projection state, and is currently selected. It is not necessary to check the input terminal on the screen and then to switch the input terminal by operating the remote control or the control panel, and an image can be displayed quickly and with few operations.

(Embodiment 2)
Next, an image display apparatus according to Embodiment 2 of the present invention will be described with reference to FIG.

  FIG. 3 is a diagram showing a schematic configuration of a projector which is an image display apparatus according to the second embodiment of the present invention, and 9 is a processor for expanding an image file in the SD card inserted into the SD card slot 1, and an image signal Is supplied to the selection circuit 4, and information such as the format, file name, and extension of the image file is supplied to the microcomputer 5. Other components are the same as those in FIG.

  The processor 9 is connected to the microcomputer 5 and has a function of transmitting image file information such as the format, file name, and extension of the data image file in the SD card inserted into the SD card slot 1 to the microcomputer 5. Have.

  The operation of the projector according to the present embodiment configured as described above will be described. A flowchart showing the operation is the same as FIG. 2 of the first embodiment.

  As in the first embodiment of the present invention, normally, when a user uses a projector, first, the AC power is turned on to enter the standby state, and the input terminal image displayed when the microcomputer 5 was previously turned off is displayed. Read from memory.

  Also in this embodiment, it is assumed that the Video input terminal 2 was selected when the power was turned off last time.

  Here, a user who wants to display an image on the SD card inserts the SD card into the SD card slot 1.

  The processor 9 processes the image file of the inserted SD card and supplies image file information such as the format, file name, and extension of the image file to the microcomputer 5.

  The microcomputer 5 analyzes the image file information, and if the corresponding image file information exists in the inserted SD card, the microcomputer 6 turns on the lamp 6 and supplies the image signal of the Video input terminal 2 to the liquid crystal panel 7. The selection circuit 4 that has been selected to control is controlled to supply the image signal of the processor 9 to the liquid crystal panel 7.

  Radiant light from the lamp 6 is transmitted through the liquid crystal panel 7 to form an image, and is enlarged and projected on a screen (not shown) by the projection lens 8.

  Through the operations described above, a user who wants to project an image on the SD card can display the image simply by inserting the SD card into the SD card slot 1, and the power can be turned on by operating the remote control or the control panel. There is no need to turn on or confirm the current input terminal on the on-screen screen, etc., and then switch the input terminal by operating the remote control or the control panel, and an image can be displayed quickly and with few operations.

  In the present embodiment, if the image file information to be supported exists in the SD card, the power is turned on to turn on the lamp 6 and the selection circuit 4 is controlled so that the image signal of the processor 9 is displayed on the liquid crystal panel. However, even if there is no image file information to be supported in the SD card, the power is turned on and the lamp 6 is turned on to display on the screen that there is no image file to be supported. You may do it.

  In this embodiment, the case where the SD card is inserted into the projector in the standby state has been described. However, for example, an image signal from the Video input terminal 2 is projected and displayed on the projector in the lamp lighting state. When the SD card is inserted into the SD card slot 1 of the projector, the microcomputer 5 analyzes the image file information, and if the corresponding image file information exists in the inserted SD card, the image of the video input terminal 2 is displayed. An operation of controlling the selection circuit 4 that has been selected to supply the signal to the liquid crystal panel 7 and supplying the image signal of the processor 9 to the liquid crystal panel 7 is also possible.

  As a result, a user who wants to project an image on the SD card can display the image on the SD card only by inserting the SD card into the SD card slot 1 of the projector that is in the projection state. It is not necessary to switch the input terminal by operating the remote control or the control panel after the input terminal is confirmed on the screen or the like, and an image can be displayed quickly and with few operations.

  In the first and second embodiments of the present invention, a projector equipped with an SD card slot, a video input terminal, and an RGB input terminal as input terminals has been described. However, the present invention is not limited to this. Even in a projector equipped with only an SD card slot, operations such as detecting the insertion of an SD card or turning on a lamp according to image file information and displaying an image can be easily inferred from the present invention.

(Embodiment 3)
Next, a projection type image display apparatus according to Embodiment 3 of the present invention will be described.

  FIG. 4 is a diagram showing a schematic configuration of a projector which is a projection type image display apparatus according to Embodiment 3 of the present invention. 10 is a plug and play memory, and other components are the same as those in FIGS. Is the same.

  The plug and play data signal from the RGB input terminal 3 is connected to the plug and play memory 10 and to the microcomputer 5.

  The operation of the projector according to the present embodiment configured as described above will be described with reference to the flowchart of FIG.

  When the user uses a projector, the projector is turned on and the lamp is turned on to display an image of the selected input terminal. Usually, since the projector stores in memory (not shown) which input terminal was selected by the selection circuit 4 when the power was turned off last time, this data is read when the power is turned on and selected when the power supply used last time is turned off. The selected input terminal is selected.

  Here, as an example, it is assumed that the input terminal selected when the power is turned off at the previous use is the Video input terminal 2.

  A user who wants to display an image of a notebook PC (not shown) connects the output signal of the notebook PC to the RGB input terminal 3 and sets the notebook PC image output mode to the external monitor mode.

  At this time, the notebook PC accesses the plug and play memory 10 inside the projector and performs various settings of the notebook PC. In this embodiment, an access signal from the notebook PC to the plug and play memory 10 is connected to the microcomputer 5. Therefore, the user can detect that an image signal is input to the projector by setting the notebook PC to the external monitor mode.

  Here, the microcomputer 5 turns on the lamp 6 to turn on the power of the projector, and the selection circuit 4 that has been selected to supply the input signal from the Video input terminal 2 to the liquid crystal panel 7 is input to the RGB input terminal. The image of the notebook PC connected to 3 is switched to be supplied to the liquid crystal panel 7, and the image of the notebook PC is displayed.

  A user who wants to display an image of a notebook PC can display the image only by connecting the output signal of the notebook PC to the RGB input terminal 3 and setting the image output mode of the notebook PC to the external monitor mode. No need to operate the remote control or control panel to turn on the power, check the current input terminal on the screen etc., and then operate the remote control or control panel to switch the input terminal. Images can be displayed with few operations.

  In this embodiment, when the user turns on the lamp, the projector is turned on and the input is performed only by setting the notebook PC to the external monitor mode without confirming which input terminal is selected. By having the function of switching the terminal to the RGB input terminal 3, an image can be displayed quickly and with little effort.

  In the third embodiment, the output signal of the notebook PC is connected to the RGB input terminal 3 to the projector in the standby state and the image output mode of the notebook PC is set to the external monitor mode. In the projector in the state, for example, the projector that projects and displays the image signal from the Video input terminal 2, the output signal of the notebook PC is connected to the RGB input terminal 3, and the setting of the image output mode of the notebook PC is externally monitored By setting the mode, the microcomputer 5 detects the plug-and-play data, controls the selection circuit 4 that has been selected to supply the image signal of the Video input terminal 2 to the liquid crystal panel 7, and the RGB input terminal 3. The operation of supplying the image signal to the liquid crystal panel 7 is also possible.

  In this embodiment, the signal connected to the RGB input terminal 3 is a notebook PC. However, the present invention is not limited to this, and is effective in a computer that communicates plug and play data such as a desktop personal computer.

  Furthermore, in the first to third embodiments of the present invention, the liquid crystal projector has been described. However, the display device is not limited to the liquid crystal, and is effective for a projector using a DMD.

  The projection type image display apparatus according to the present invention can display a projection by displaying the lamp only by inserting the memory card into the memory card slot when displaying the image of the memory card by the projector. Images can be displayed quickly and with little effort, or when a computer signal image such as a notebook PC is projected and displayed by a projector, the image output mode setting of the computer is simply set to the external monitor mode. Can be displayed, and an image can be displayed quickly and with less effort.

1 is a schematic configuration diagram of a projector that is a projection-type image display device according to a first embodiment of the present invention. Flowchart showing the operation of the projector according to the first embodiment of the present invention. Schematic configuration diagram of a projector that is a projection-type image display device according to a second embodiment of the present invention. Schematic configuration diagram of a projector that is a projection-type image display device according to a third embodiment of the present invention. Flowchart showing the operation of the projector according to the third embodiment of the present invention. Flowchart showing the operation of projecting and displaying an image on a memory card in a conventional projector A flowchart showing an operation of projecting and displaying an image of a notebook PC in a conventional projector

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 SD card slot 2 Video input terminal 3 RGB input terminal 4 Selection circuit 5 Microcomputer 6 Lamp 7 Liquid crystal panel 8 Projection lens 9 Processor 10 Plug and play memory 11 Card detection part

Claims (13)

A memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, an image display device for displaying an image signal from the memory card slot and the image input terminal as an image, and a projection light A lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and a selection to selectively switch an image signal from the memory card slot and the image input terminal to supply to the image display device A circuit, a control circuit that controls switching of the selection circuit and lighting of the lamp, and a card detection unit that detects that a memory card has been inserted into the memory card slot and sends a detection signal to the control circuit. Have
The control circuit turns on the lamp based on an input result of a detection signal for detecting that a memory card has been inserted into the memory card slot in a standby state of the apparatus body, and switches the selection circuit to a switching destination. A projection-type image display device that controls an image to display an image. When a detection signal indicating that a memory card has been inserted into the memory card slot is input, the control circuit turns on the lamp and at that time the selection circuit selects either the memory card slot or the image input terminal. 2. The projection type image display apparatus according to claim 1, wherein the selection circuit is controlled so as to supply an image signal from the memory card slot to an image display device regardless of whether or not the image display device is in a state. A memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, an image display device for displaying an image signal from the memory card slot and the image input terminal as an image, and a projection light A lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and a selection to selectively switch an image signal from the memory card slot and the image input terminal to supply to the image display device A circuit, a control circuit that controls switching of the selection circuit and lighting of the lamp, and a card detection unit that detects that a memory card has been inserted into the memory card slot and sends a detection signal to the control circuit. Have
The control circuit displays an image by controlling a switching destination of the selection circuit based on an input result of a detection signal for detecting that a memory card is inserted into the memory card slot in a projection state of the lamp. A projection-type image display device characterized by that. When a detection signal indicating that a memory card has been inserted into the memory card slot is input to the control circuit, whether the selection circuit is currently selecting the memory card slot or the image input terminal 4. The projection type image display apparatus according to claim 3, wherein the selection circuit is controlled so as to supply an image signal from the memory card slot to an image display device. A memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, an image display device for displaying an image signal from the memory card slot and the image input terminal as an image, and a projection light A lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and a selection to selectively switch an image signal from the memory card slot and the image input terminal to supply to the image display device A circuit, and a control circuit for controlling switching of the selection circuit and lighting of the lamp,
When the control circuit determines that an image file exists in the memory card inserted into the memory card slot in the standby state of the apparatus main body, or an image file that can be displayed exists, at least In one case, the projection type image display device displays the image by turning on the lamp and controlling the switching destination of the selection circuit. When there is an image file in the memory card inserted in the memory card slot or at least one of the cases when it is determined that the image file can be displayed, the control circuit turns on the lamp and Regardless of whether the selection circuit selects the memory card slot or the image input terminal, the selection circuit is controlled to supply the image signal from the memory card slot to the image display device. The projection type image display device according to claim 5, wherein A memory card slot into which a memory card storing an image file is inserted, one or more image input terminals, an image display device for displaying an image signal from the memory card slot and the image input terminal as an image, and a projection light A lamp for projecting an image displayed on the image display device to the outside of the apparatus main body, and a selection to selectively switch an image signal from the memory card slot and the image input terminal to supply to the image display device A circuit, and a control circuit for controlling switching of the selection circuit and lighting of the lamp,
The control circuit has at least one of a case where an image file exists in a memory card inserted into the memory card slot or an image file that can be displayed exists in the projection state of the lamp. In this case, the projection type image display device displays an image by controlling a switching destination of the selection circuit. When at least one of the control circuit determines that the image file exists in the memory card inserted into the memory card slot or the image file can be displayed, the selection circuit at that time causes the selection circuit to Regardless of whether a card slot or an image input terminal is selected, the selection circuit is controlled to supply an image signal from the memory card slot to an image display device. The projection type image display apparatus according to claim 7. An RGB input terminal, at least one image input terminal other than the RGB input terminal, an image display device for displaying an image signal from the RGB input terminal and the image input terminal other than the RGB input terminal as an image, and projection A lamp for projecting an image displayed on the image display device by light to the outside of the apparatus main body, and an image signal from an image input terminal other than the RGB input terminal and the RGB input terminal by selectively switching the image; A selection circuit to be supplied to a display device; a control circuit for controlling switching of the selection circuit and lighting of the lamp; a plug-and-play memory connected to the RGB input terminal and the control circuit; A plug and play detection unit for detecting a communication signal to the plug and play memory;
The control circuit turns on the lamp and controls a switching destination of the selection circuit based on a detection result of a communication signal from the RGB input terminal to the plug and play memory in a standby state of the apparatus main body. A projection-type image display device characterized by that. The control circuit detects the plug-and-play memory communication signal from the RGB input terminal, and turns on the lamp when it is determined that the image signal is input from the RGB input terminal. Regardless of whether the input terminal of the RGB input terminal or the image input terminal other than the RGB input terminal is selected,
11. The projection type image display apparatus according to claim 10, wherein the selection circuit is controlled to supply an image signal from the RGB input terminal to an image display device. An RGB input terminal to which an image signal is input, at least one image input terminal other than the RGB input terminal, and an image signal from the RGB input terminal and the image input terminal other than the RGB input terminal are displayed as an image. Selects an image display device, a lamp for projecting an image displayed on the image display device by projection light to the outside of the apparatus body, and an image signal from an image input terminal other than the RGB input terminal and the RGB input terminal A selection circuit for switching and supplying to the image display device, a control circuit for controlling switching of the selection circuit and lighting of the lamp, a plug-and-play memory connected to the RGB input terminal and the control circuit, Plug and play for detecting a communication signal from the RGB input terminal to the plug and play memory And a detecting section,
The control circuit controls a switching destination of the selection circuit based on a detection result of a communication signal from the RGB input terminal to the plug and play memory in a projection state of the lamp. Display device. When the control circuit determines that an image signal has been input from the RGB input terminal by detecting a plug-and-play memory communication signal from the RGB input terminal, the selection circuit at that point in time selects the RGB input terminal or the RGB Regardless of which image input terminal other than the input terminal is selected,
12. The projection type image display apparatus according to claim 11, wherein the selection circuit is controlled to supply an image signal from the RGB input terminal to an image display device. 13. The projection type image display apparatus according to claim 1, wherein the image display device is a projector using a liquid crystal panel or DMD.

Images