JP2000292857A - Projection type video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a user to easily recognize a detected abnormal state. SOLUTION: When the burn-out of a lamp 24 is detected by a detection part 54, such a control action that a voice signal corresponding to the burn-out of the lamp 24 is generated from a voice producing part 55 is executed by a system microcomputer 51. Besides, the generated voice signal is outputted from a speaker 50 to inform the user of the caused abnormal state by voice.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a projection type video display device which projects an image from the back of a screen or the front of a screen, for example.

[0002]

2. Description of the Related Art An image transmitted through a screen is projected from the front by projecting light from the back of the screen, or an image projected on the screen projected from the front of the screen by projecting light from the front of the screen is viewed from the front. There is known a projection type video display device. Such a projection-type image display device is widely used in recent years because it is possible to easily realize a large-sized and thin screen.

Incidentally, the above-mentioned projection type video display device has a detection function for detecting whether or not it is operating normally. The detection function provided in the projection type image display device mainly includes a lamp failure detection function for detecting non-lighting due to the life of the lamp as a light source and a lamp temperature detection function for detecting an ambient temperature of the lamp. Are known.

[0004] The lamp failure detection function is provided for detecting lamp burnout due to lamp life, since the life of the lamp used for the light source is about several thousand hours (about 4000 to 5000 hours). In addition, since lamp non-lighting occurs not only when the lamp burns out due to the lamp life but also when the lamp start-up fails, for example, the lamp failure detection function performs the start-up process for lamp lighting. If the lamp does not turn on even after the operation is performed a plurality of times, it is determined that the lamp has run out. The lamp temperature detection function is provided to detect the temperature around the lamp due to the heat generated by the lamp in order to prevent the heat generated by the lamp as the light source from affecting the liquid crystal panel and the like which are heat-resistant components. ing.

When the detection function detects, for example, a lamp expiration due to the lamp life or an abnormal lamp temperature, the main power supply of the projection type image display device is forcibly turned off. However, when the main power is forcibly turned off by the detection function as described above, the user cannot recognize what kind of abnormality has occurred, and the user cannot take any measures.

[0006] Therefore, when an abnormality of the projection type video display device is detected by the present applicant by the detection function, the type of the detected abnormality is determined by using an operation display LED of a main power supply, a standby power supply, or a power supply for BS. There has been proposed a projection-type image display device and the like for displaying images by displaying them (Japanese Patent Laid-Open No. 9-1 / 1991).
No. 30700).

[0007]

However, when an abnormal state detected by the detection function as described above is displayed using an LED, some users may use an LED.
May not notice the abnormal display due to
It is not enough to make the user recognize that an abnormality has occurred. Further, even if the user notices the abnormality display by the LED, it is difficult for the user to immediately recognize the type of abnormality indicated by the LED display form. I had to.

Further, even if the user can recognize that the lamp has run out by the display of the LED, it is usually assumed that the user will replace the lamp by himself, and the user will replace the lamp with a spare lamp. It is possible to return from the abnormal state to the normal state, but it is conceivable that the user does not know the procedure for replacing the lamp and does not understand how to deal with it. In particular, when replacing the lamp, even when the main power is off, the lamp is in a high temperature state for a while immediately after the power is turned off. For this reason, the work must be performed safely according to accurate procedures.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a projection-type image display device which allows a user to reliably recognize an abnormal state. Aim. It is another object of the present invention to provide a projection-type image display device that allows a user to safely perform a recovery operation when an abnormality that can be dealt with by a user occurs.

[0010] To achieve the above object, the present invention detects an abnormal state in a projection type video display device capable of modulating output light from at least one light source according to a video signal and enlarging and projecting it on a screen. An abnormal state detecting means, an abnormal type determining means for determining an abnormal type based on a detection signal from the abnormal state detecting means, an audio signal generating means for generating a required audio signal corresponding to the abnormal type, and an audio signal A sound output means capable of outputting the sound as audible sound, and based on the determination result of the abnormality type determination means, generate a required sound signal from the sound signal generation means,
Control means for controlling the sound signal to be output by the sound output means.

The control means includes a name of the abnormality type determined by the abnormality type determination means based on a result of the determination by the abnormality type determination means, and a voice of a return operation procedure for returning from the abnormal state to the normal state. A signal is generated by the audio signal generation means, and control for outputting the signal from the audio output means is performed.

Further, operation detecting means for detecting that an operation corresponding to the returning operation procedure output from the voice output means has been performed is provided, and the control means is provided for returning from an abnormal state to a normal state. When the sound signal of the operation procedure is generated by the sound generation means, the sound signal corresponding to the return operation procedure is generated from the sound generation means in the unit of the return operation, and when the operation of the return operation unit is detected by the operation detection means. Then, the sound signal corresponding to the next return operation is generated from the sound generating means in units of the return operation.

Still further, according to the present invention, in a projection type video display device capable of modulating output light from at least one light source in accordance with a video signal and projecting it on a screen in an enlarged manner, the light source becomes unlit abnormally. Light source detecting means for detecting the temperature of the light source, temperature detecting means for detecting the temperature of the light source, audio signal generating means for generating an audio signal corresponding to the light source replacement procedure, and outputting the audio signal as audible audio. Voice output means, and operation detection means for detecting whether or not the replacement procedure when replacing the light source was performed normally;
When the light source detecting means detects that the light source is turned off, the sound signal generating means generates a sound signal for prompting the replacement of the light source, and the sound output means outputs the sound as a sound. When the temperature is detected to be equal to or lower than the predetermined temperature, the sound signal generation unit generates a sound signal of a light source replacement procedure, and the sound output means controls the sound to be output by sound. .

According to the present invention, when, for example, an abnormal state of the light source is detected by the abnormal state detecting means, an audio signal corresponding to the abnormal type determined by the abnormal type determining means is generated by the audio signal generating means. Since the voice output means outputs the voice by voice, it is possible to notify the user of the abnormality type by voice.

When the user performs a return operation for returning from the abnormal state to the normal state, the return operation procedure is output by voice for each operation unit, and the operation of the return operation unit is performed by the operation detection means. Since the return operation is advanced while detecting whether or not the operation has been performed, it is possible to cause the user to perform the return operation in an accurate procedure.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a liquid crystal rear projector as a rear projection type video display will be described as an embodiment of the projection type video display of the present invention. First,
A schematic configuration of the liquid crystal rear projector according to the present embodiment will be described with reference to FIGS. FIG.
(A) is a front view of the liquid crystal rear projector according to the present embodiment, and (b) is a side view thereof. This figure 1
The liquid crystal rear projector 1 of the present embodiment shown in (a) and (b) includes an upper cabinet 2 and a lower cabinet 3. The upper cabinet 2 has a frame 9 formed on the front side thereof, and the screen 4 is attached to the frame 9. Further, the inside is hollow, and a mirror 11 is attached to the back side facing the screen 4.

The lower cabinet 3 is provided with an apparatus main body provided with various circuit parts necessary for the liquid crystal rear projector excluding the screen 4 and the mirror 11 provided in the upper cabinet 2. An optical unit 12 having a projection lens is disposed substantially at the center of such a device main body.

The front sides of the lower cabinet 3 are covered with speaker covers 7a and 7b having a large number of through holes. The light source unit 5 and the right speaker 6a are disposed inside a speaker cover 7a disposed on the right front side of the lower cabinet 3. Further, a left speaker 6b is provided inside the speaker cover 7b provided on the front left side.

As the light source 5, for example, a high-performance, high-intensity discharge lamp is used. Such a high-intensity discharge lamp is housed in a lamp housing called a lamp housing, and when replacing the lamp, the liquid crystal rear projector 1 is used.
The lamp can be easily replaced for each lamp housing without shifting or moving the installation position of the lamp. The light source unit 5 including the lamp housing will be described later.

An operation panel 8 is provided in the center of the front surface of the lower cabinet 3, and various operations on the liquid crystal rear projector 1 of the present embodiment can be manually performed. The operation panel 8 is provided with a light receiving section of a remote commander so that various operations can be performed by a remote commander (not shown).

FIG. 2 is an exploded perspective view showing the structure of the light source unit 5 of the liquid crystal rear projector 1 according to the present embodiment. The light source unit 5 includes a lamp housing storage unit 21 formed on the front right side of the lower cabinet 3 and can be stored in the lamp housing storage unit 21, and includes a high-intensity discharge lamp (hereinafter, simply referred to as a "lamp") 24. , And a lamp cover 32.

The lamp housing storage portion 21 is formed of a heat insulating material, and the lamp housing 22 can be positioned and fixed therein. Then, an optical path window 23 is formed on the left side surface from which light from the lamp 24 is emitted when the lamp housing 22 is fixed, and a large number of through holes of a predetermined size are provided on the other side surface.

The lamp housing 22 is formed of a heat insulating material in the same manner as the above-described lamp housing housing portion 21, and has a lamp support surface 25 for supporting the lamp 24 and a front surface when the lamp housing 22 is housed in the lamp housing portion 21. A handle surface 28 provided with a handle 27 also made of a heat insulating material, and a top cover 30 formed of a metallic member and having a large number of through holes 29 formed in a mesh shape.

The lamp support surface 25 is provided with a circular window portion 31 which can be engaged and supported with the glass surface on the front surface of the lamp 24 facing the outside. The handle 27 formed on the handle surface 28 has a structure formed into a substantially semicircular blind hole shape. For example, the user inserts the thumb with one of the right hand or the left hand from above and the index finger from below. Insert the back part of the remaining finger
8 to allow handling such as insertion and removal. This allows the lamp housing 22 to be stably housed in the lamp housing 21 when the user replaces the lamp in units of the lamp housing 22. The lamp housing 22 housed in the lamp housing 21 is fixed by a hexagon screw (not shown) or the like. A fan for cooling the lamp 24 is provided on an upper surface (not shown) of the lamp housing 21.

The lamp cover 32 is attached to the lower cabinet 3 with the lamp housing 22 housed in the lamp housing 21. Therefore, a screw hole is provided in the upper part of the lamp cover 32 so that the lamp cover 32 can be attached to the front surface of the lamp housing 21.

The light source unit 5 is provided on the rear surface of the lamp housing 22 (not shown) by inserting the lamp housing 22 into the lamp housing housing 21 from the front side and engaging with the lamp housing. A connector is connected to a main body provided in the lower cabinet 3, and the connector
Is supplied with a drive voltage.

As described above, the liquid crystal rear projector 1 of the present embodiment has a structure in which the lamp housing 22 provided with the lamp 24 is formed in a cartridge form and is housed in the lamp housing 21 from the front side of the liquid crystal rear projector 1. Therefore, when the lamp 24 is out of the lamp due to the service life or the like, the lamp housing 22 in the cartridge type is used.
In units, the user can easily remove, insert and replace.

FIG. 3 is a block diagram showing a main configuration of the liquid crystal rear projector according to the present embodiment as described above. In FIG. 3, terrestrial waves (UHF / VHF) received by the antenna 41a are input to the U / V tuner 42a. Also, a satellite wave (BS) received from a broadcasting satellite (BS: broadcast satellite) received by the antenna 41b.
(Wave) is input to the BS tuner 42b. The U / V tuner 42 a selects a signal of a desired channel from the received radio waves, and outputs a video signal and an audio signal of the selected channel to the AV switch 43. The BS tuner 42b selects a signal of a desired channel from the received radio waves, and outputs a video signal and an audio signal of the selected channel to the AV switch 43.

The AV switch 43 is a U / V tuner 42
a and the video signal and the audio signal supplied from the BS tuner 42b or the video signal input from the video input terminal are selected and output. The video signal processing unit 44 includes, for example, a so-called Y / C separation circuit that separates an input video signal into a luminance signal and a color signal, a luminance signal processing circuit that performs signal processing of a luminance signal, and a color that performs signal processing of a color signal. It is composed of a signal processing circuit and the like.
The video signal selected by the switch 43 and supplied through the AV switch 43 is subjected to required signal processing to perform RG
The signal is output as a B signal.

The LCD driver 45 includes a video signal processing unit 44
LCD panel 4 based on the RGB signals supplied from
6 is performed. The LCD panel 46 has R, G, B
It is composed of three panels corresponding to each. As a result, light emitted from the lamp 24 installed on the rear side of the LCD panel 46 is transmitted through the screen 4 to display an image.

The audio signal processing unit 48 includes an AV switch 43
A required signal processing such as volume and sound quality is performed on the audio signal selected through the switch 47 and input via the changeover switch 47. The audio signal output from the audio signal processing unit 48 is supplied to the audio amplifier 49,
0 is output as audio accompanying the video.

The audio generator 55 stores various types of audio information, and can generate a predetermined audio signal under the control of the system microcomputer 51 described later.

The lamp driver 53 is supplied with a commercial AC voltage (100 V AC) from a commercial AC power supply, and supplies a predetermined operating voltage to the lamp 24 in the lamp housing 22 under the control of the system microcomputer 51. I do. When the lamp 24 is turned off, the lamp driver 53 stops supplying the operating voltage to the lamp 24.

The power supply circuit 56 converts a commercial AC voltage (100 V AC) from a commercial AC power supply into a predetermined drive voltage and supplies the drive voltage to each circuit block.

Although a detailed configuration of the detecting section 54 will be described later, an abnormality detecting section for detecting an abnormal state of the liquid crystal projector 1 such as a non-lighting of the lamp 24, and for allowing a user to return from the abnormal state to the normal state, for example. And an operation detection unit that detects whether the return operation is performed in accordance with the operation procedure when the operation is performed.

The system microcomputer 51 performs necessary control on each circuit block via the bus line 52 based on an operation signal from the operation section 8 and an operation signal from a remote commander received by the light receiving section 8a. . Further, based on the various detection signals supplied from the detection unit 54, the system microcomputer 51 grasps the state of each unit of the liquid crystal projector 1 and supplies a required control signal to the audio signal generation unit 55 and the like. The control for outputting the sound corresponding to the sound signal output from the sound signal generation unit 55 from the speaker 50 is executed.

FIG. 4 shows an example of a specific configuration of the detection section 54 as described above. The detection unit 54 shown in FIG.
As an abnormality detection unit that detects an abnormal state of liquid crystal projector 1 of the present embodiment, a detection unit that detects a lamp abnormality is provided. Further, as an operation detection unit that detects a return operation performed by the user, a temperature detection unit that detects the temperature of the lamp housing 22 and a cover detection unit that detects the open / close state of various covers that are opened and closed for lamp replacement. The example provided is shown.

In FIG. 4, resistors R1 to R7
Is connected to a voltage supply terminal Vcc of the system microcomputer 51. The other end of the resistor R1 is a lamp driver 53
And a lamp abnormality detection terminal A of the system microcomputer 51. In this case, the output terminal of the lamp driver 53 is in an open state when the lamp 24 is normally lit, and the lamp state detection signal L supplied to the lamp detection terminal A of the system microcomputer 51 is at a high level. Becomes

On the other hand, when the lamp 24 is turned off,
The status output terminal of the lamp driver 53 is short-circuited (short-circuit)
State, and the lamp detection terminal A of the system microcomputer 51
Is at a low level. Therefore, the system microcomputer 51 can detect a lamp abnormality occurring in the liquid crystal projector 1 by monitoring the voltage level of the lamp detection signal L applied to the lamp detection terminal A.

The other end of the resistor R2 is connected to one end of a thermistor 61 for detecting the temperature of the lamp housing 22 in which the lamp 24 is built, and to a temperature detection terminal B of the system microcomputer 51. The other end of the thermistor 61 is grounded. In this case, if the temperature of the lamp housing 22 detected by the thermistor 61 is high, the thermistor 6
1 is smaller than a predetermined resistance value, the temperature detection signal T1 applied to the temperature detection terminal B is low level,
Conversely, when the temperature of the lamp housing 22 falls below a predetermined temperature and the resistance value of the thermistor 61 becomes larger than the predetermined resistance value, the temperature detection signal T1 applied to the temperature detection terminal B becomes high level. Become. Note that the predetermined temperature value is a temperature that is at least a temperature at which there is no problem even if the user touches the lamp housing 22 by mistake. Therefore, the system microcomputer 51 can detect the temperature state of the lamp housing 22 based on the temperature detection signal T1 applied to the temperature detection terminal B.

Further, a plurality of thermistors 62a and 62b having different characteristics may be provided in the lamp house 22 as in this embodiment, and the temperature of the lamp housing 22 may be detected in a stepwise manner. In this case, the one ends of the thermistors 62a and 62b are connected to the other ends of the resistors R3 and R4, respectively, and are connected to the temperature detection terminals C and D of the system microcomputer 51, respectively, so that the voltages are applied to the temperature detection terminals C and D. Based on the temperature detection signals T2 and T3, the system microcomputer 51 can detect the temperature of the lamp housing 22 stepwise.

A resistor R5 is connected to one end of a switch 63a for detecting the open / closed state of the speaker cover 7a and a detection terminal E of the system microcomputer 51. Similarly, a resistor R6 is connected to a switch 63b for detecting the open / closed state of the lamp cover 32.
And the detection terminal F of the system microcomputer 51. The resistor R7 is connected to one end of a switch 63c for detecting whether the lamp housing 22 is properly mounted in the lamp housing 21, and to the system microcomputer 51.
Is connected to the detection terminal G. Note that these switches 6
The other ends of 3a to 63c are grounded.

In this case, when the speaker cover 7a and the lamp cover 32 are closed and the lamp housing 22 is normally mounted, the switches 63a to 63b are in a short-circuit state. E ~
The detection signals S1 to S3 applied to G are at a low level. On the other hand, when the speaker cover 7a and the lamp cover 32 are in the open state or the lamp housing 22 is not properly attached, the corresponding switches 63a to 63c are in the open state, and the switches 63a to 63c are applied to the detection terminals EG. Detection signals S1 to S3 go to a high level.

Therefore, the system microcomputer 51 can determine whether or not the user has performed the return operation in an accurate procedure by detecting the detection signals S1 to S3 applied to the detection terminals E to G. become. The operation detection unit described in the present embodiment is merely an example, and the operation detection unit may detect the operation state of another part.

As described above, in the liquid crystal projector 1 of the present embodiment, the system microcomputer 51 determines whether or not a lamp abnormality has occurred based on the lamp detection signal L from the detection unit 54, and the lamp abnormality has occurred. When you do
The switch 47 shown in FIG. 3 is switched from the terminal on the side of the AV switch 43 to the terminal on the side of the sound generator 55, and the control for generating the sound signal corresponding to the lamp abnormality from the sound signal generator 55 is performed. Execute.

As a result, the audio signal output from the audio signal generating section 55 is output to the audio signal processing section 48 via the switch 47, and is subjected to predetermined signal processing by the audio signal processing section 48. The signal is amplified by the audio amplifier 49 and output from the speaker 50 as audible sound. That is, when the system microcomputer 51 determines that a lamp abnormality has occurred, the liquid crystal projector 1 of the present embodiment notifies the user of the occurrence of the lamp abnormality by voice.

If the abnormality determined by the system microcomputer 51 is an abnormality (lamp replacement) that can be dealt with by the user, an audio signal indicating an operation procedure for returning to the normal state is output to the audio signal generation unit 55. And the voice can be notified from the speaker 50.

Further, in that case, an audio signal is generated in units of the return operation and output from the speaker 50, and the detection unit 54 detects whether the user has performed the return operation in accordance with the return operation instruction output by voice. Like that. When the detection unit 54 detects that the operation corresponding to the operation step is properly performed by the user, the sound signal of the next operation step is generated by the sound generation unit 55 and output from the speaker 50 by sound. I have to.

Thus, when the user performs a return operation from the abnormal state to the normal state, it is possible to safely and accurately execute the return operation in accordance with the operation steps. In addition, when the operation corresponding to the operation step notified by voice by the user is not performed, the fact may be notified again by voice.

Hereinafter, the operation of the liquid crystal projector 1 according to the present embodiment, which has been described, will be described in detail by taking, for example, a case where the lamp 24 serving as a light source is turned off due to a burn out of the lamp. .

When the lamp 24 is cut off due to its life or the like and becomes unlit, the status output terminal of the lamp driver 53 is short-circuited.
The lamp detection signal L applied to the first lamp detection terminal A is at a low level. In this case, the system microcomputer 51 determines that the lamp is abnormal (failure), and executes control for notifying by voice that the lamp 24 is not lit and that a lamp replacement operation is required. .

That is, the system microcomputer 51 controls the sound generator 55 shown in FIG. 3 to generate a sound signal for causing the user to recognize that a lamp failure has occurred and to replace the lamp. The control for notifying from the speaker 50 is executed. As a result, the speaker 5
From 0, for example, "The lamp has failed. Replace the lamp after about 30 minutes without turning off the power. The temperature of the lamp is high, so if you replace it immediately, you may get burned." Sound is output.

If the power is not turned off, the temperature of the lamp housing 22 usually drops to a temperature at which it can be replaced in about 30 minutes by a fan for cooling the lamp housing.
For example, the cooling period of the lamp housing 22 is set to 30 minutes.
When the thermistors 62a and 62b having different characteristics are provided in the lamp housing 22 as in the present embodiment, the temperature detection signals T1 from the thermistors 61, 62a and 62b are provided.
Based on ~ T3, for example, it is also possible to output a sound such as "Please wait another 20 minutes" or "Please wait another 10 minutes" about every 10 minutes.

After the predetermined cooling time has elapsed, the system microcomputer 51 causes the sound generator 55 to generate a sound signal for causing the user to perform a lamp replacement operation. The temperature state of the body 22 is detected. Here, when the temperature of the lamp housing 22 is higher than the predetermined temperature, control is performed so that the audio signal generation unit 55 generates an audio signal for causing the user to wait for lamp replacement work for a while, and outputs the audio signal from the speaker 50. Execute

The detection of the temperature of the lamp housing 22 is as follows.
As described above, it is determined based on the temperature detection signal T1 applied to the temperature detection terminal B of the system microcomputer 51, and when the detection signal applied to the temperature detection terminal B is at a low level, the lamp housing It is determined that the temperature of the body 22 is high. In this case, a sound for waiting for lamp replacement for a while, for example, a sound such as “Please wait” is output.

When the voltage level of the temperature detection signal T1 applied to the temperature detection terminal B of the system microcomputer 51 changes from a low level to a high level as the temperature of the lamp housing 22 decreases, the system microcomputer 51 can replace the lamp. Then, control is performed to output a sound from the speaker 50, for example, "Lamp can be replaced. First remove the front speaker cover."

Here, when the user opens the speaker cover 7a according to the sound from the speaker 50, that is, the voltage level of the detection signal S1 applied to the detection terminal E of the system microcomputer 51 changes from a low level to a high level. When the system microcomputer 51 determines that the speaker cover 7a has been opened, the system microcomputer 51 outputs a sound such as "The speaker cover has been removed. Remove the lamp cover mounting screw and remove the lamp cover" from the speaker 50. Execute the control of.

When the user removes the lamp cover 32 according to a voice instruction from the speaker 50,
The detection signal S2 applied to the detection terminal F of the system microcomputer 51 changes from a low level to a high level. In this case, it is determined that the lamp-cover 32 has been opened, and for example, "the lamp cover has been removed. Use a hex wrench to pull out the hexagonal screw with a plastic handle, and then insert a new lamp and tighten the hexagonal screw. "

Next, when the user replaces the lamp housing 22 in accordance with a voice instruction from the speaker 50, the voltage level of the detection signal S3 applied to the detection terminal G of the system microcomputer 51 changes from low to high. When the level reaches the level, it is determined that the lamp has been replaced, and a control is performed to output a sound from the speaker 50, for example, "The lamp has been attached. Next, tighten the mounting screws of the lamp cover."

Then, when the lamp cover 32 is attached and the detection signal S2 applied to the detection terminal F of the system microcomputer 51 switches from the high level to the low level, a sound such as "Please attach the speaker cover" is generated. Is output from the speaker 50, and the speaker cover 7a is continuously attached, and the sound such as "Lamp replacement is completed. Thank you for your tiredness. Please turn on the power switch again" is output from the speaker 50 to perform the lamp replacement operation. Will be completed.

Therefore, after that, when the user turns on the power switch of the liquid crystal projector 1 of the present embodiment again, the lamp driver 53 is reset by the system microcomputer 51, and the operating voltage is supplied from the lamp driver 53 to the lamp 24. Then, a return to a normal state is achieved.

In the present embodiment, the case where a lamp non-lighting abnormality (failure) has occurred as an abnormal state of the liquid crystal projector 1 has been described as an example. However, this is merely an example and occurs in the liquid crystal projector 1. Even when various abnormalities, for example, a temperature abnormality (rising) of the lamp in a normal use state or an abnormality of a cooling fan for cooling the lamp occur, it is naturally possible to notify the user by voice. .

Further, in this embodiment, the rear projection type video display device in which light is projected from the rear side of the screen and an image is viewed through the screen has been described as an example. However, the present invention is not limited to this. For example, it is needless to say that the present invention can be applied to a front projection type video display device in which light is projected from the front of the screen and an image projected on the screen is viewed from the projection side.
Further, the present invention is not limited to these projection type video display devices, and can be applied to various electronic devices.

[0064]

As described above, according to the present invention, when an abnormal state detecting means detects, for example, an abnormal state of a light source, a sound signal corresponding to the abnormal type determined by the abnormal type determining means is output. Since the signal is generated by the signal generation unit and output by voice from the voice output unit, the user can easily recognize the abnormality that has occurred.

Further, according to the present invention, when an abnormal state of the light source is detected by the abnormal state detecting means, the name of the abnormality type and the return operation procedure are output by voice, so that the user can use The operation can be easily returned to the normal state by this operation return procedure. Then, when the user performs a return operation for returning from the abnormal state to the normal state, the return procedure is output by voice for each operation unit, and the operation corresponding to the operation unit is executed by the operation detection unit. Since the return operation is performed while detecting whether the return operation has been performed, the user can perform the return operation in an accurate return operation procedure, and the safety at the time of the return operation can be improved. .

Further, the present invention is provided with a temperature detecting means for detecting the temperature of the light source, and when an abnormal lighting of the light source occurs, the procedure for replacing the light source is output by voice after the temperature of the light source is sufficiently lowered. Therefore, the user can safely and reliably replace the lamp.

In particular, the present invention is very effective because, even when an abnormal state cannot be displayed on a screen or the like, for example, when an unlit abnormality of a light source occurs, the abnormal state can be recognized by voice. .

[Brief description of the drawings]

FIG. 1 is a front view and a side view for explaining a schematic configuration of a liquid crystal projector according to an embodiment of the present invention.

FIG. 2 is a diagram showing a structure of a light source unit of the liquid crystal projector according to the embodiment.

FIG. 3 is a block diagram showing a main configuration of a liquid crystal projector according to the embodiment.

FIG. 4 is a diagram illustrating a configuration of a detection unit of the liquid crystal projector according to the present embodiment.

[Explanation of symbols]

7a Speaker cover, 32 lamp cover, 22 lamp housing, 24 lamps, 48 audio signal processing unit, 49
Audio amplifier, 50 speakers, 51 system microcomputer, 53 lamp driver, 54 detector, 55
Voice generator, 61 thermistor, R1-R7 resistor, 6
3a-63c switch

Claims (4)

[Claims] 1. A projection type video display device capable of modulating output light from at least one light source in accordance with a video signal and projecting it on a screen in an enlarged manner, comprising: an abnormal state detecting means for detecting an abnormal state; An abnormality type determination unit that determines an abnormality type based on a detection signal from the state detection unit; an audio signal generation unit that generates a required audio signal corresponding to the abnormality type; and outputs the audio signal as audible audio A voice output unit capable of generating a required voice signal from the voice signal generation unit based on a determination result of the abnormality type determination unit, and controlling the voice signal to be output by the voice output unit. Means, and a projection-type image display device. 2. The control device according to claim 1, wherein the control unit is configured to determine a name of the abnormality type determined by the abnormality type determination unit based on a result of the determination by the abnormality type determination unit, and to perform a return from the abnormal state to a normal state. 2. The projection type video display device according to claim 1, wherein a control is performed such that an audio signal of an operation procedure is generated by said audio signal generation means and output from said audio output means. 3. An operation detecting means for detecting that an operation corresponding to a return operation procedure output from the sound output means has been performed, wherein the control means returns from the abnormal state to a normal state. When the voice signal of the return operation procedure is generated by the voice generating means, a voice signal corresponding to the return operation procedure is generated by the voice generation means in units of the return operation, and the return operation is performed by the operation detection means. When a unit operation is detected,
3. The projection-type image display device according to claim 2, wherein an audio signal corresponding to the next return operation is generated from the sound generating unit in units of the return operation. 4. A projection type video display device capable of modulating output light from at least one light source in accordance with a video signal and projecting the enlarged light onto a screen, wherein it is detected that the light source has become unlit abnormally. A light source detecting unit; a temperature detecting unit for detecting a temperature of the light source; an audio signal generating unit for generating an audio signal corresponding to a procedure for replacing the light source; and outputting the audio signal as audible audio. Voice output means, operation detection means for detecting whether or not the replacement procedure when replacing the light source has been performed normally, and when the light source is detected to be off by the light source detection means, the voice signal generation means Generates an audio signal for prompting the replacement of the light source, outputs the audio signal by audio from the audio output means, and detects the temperature of the light source by the temperature detection means. Control means for generating an audio signal of the procedure for replacing the light source from the audio signal generating unit when the temperature is detected to be lower than or equal to the temperature, and controlling the audio output means to output the audio signal by audio. Characteristic projection type video display device.