JP2002341442A - Projection type image display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type image display capable of using an optional lamp independently of its sort and evading the dangerousness of a user or equipment. SOLUTION: The projection type image display capable of using a replaceable lamp as a light source for projecting an image is provided with a detachable lamp unit 3 having a lamp 16 and a storage means 17 for storing at least an optimum lighting condition for the lamp 16 and a control means such as a controller 11 for reading out the optimum lighting condition stored in the storage means 17 of the unit 3 and lighting the lamp 16 with the read optimum lighting condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type image display device and a lamp unit.

[0002]

2. Description of the Related Art There is a projection type image display apparatus which modulates light according to a signal of an image to be displayed and projects the light on a screen. In this type of projection type image display device, a lamp such as a metal halide lamp is used as a light source for supplying light for image projection.

However, the optimum lighting conditions differ depending on the type of lamp, and if the lamp is lit with an inappropriate wattage or characteristics, abnormal heating may cause damage to the lamp itself or the image display device itself, or failure such as extinguishing or flickering. May occur. For this reason, even if the external appearance design is the same as that of the projection type image display device, the shape of the lamp unit and the main unit for it can be changed according to the type of lamp to prevent incorrect insertion of the lamp or adjusted to the optimal lighting conditions. And a dedicated high pressure discharge lamp lighting device.

[0004] In addition, since the lamp has a high pressure of several hundred atmospheres at the time of lighting, there is always a risk of explosion. For this reason,
For example, a projection type image display device described in Japanese Patent Application Laid-Open No. 2000-112024 includes a lamp unit having a storage unit for storing a lamp lighting time, a writing unit for the lamp unit, and a remaining life calculation unit. By managing the life in units, the risk of lamp explosion due to use beyond the life is avoided.

[0005]

However, in the conventional projection type image display apparatus, as described above, the shape of the lamp unit and the main body unit is changed for each type of lamp, and the adjustment of the high pressure discharge lamp lighting device is performed. Must be changed, which is troublesome and costly, and makes it impossible to ensure lamp compatibility. In addition, it was necessary to manage the lamp, the lamp unit, and the high pressure discharge lamp lighting device so as not to make a mistake.

[0006] Regarding the danger of lamp explosion, in the device disclosed in Japanese Patent Application Laid-Open No. 2000-112024, the only information stored in the lamp unit is the lamp operating time. Although possible, lamp rupture prior to life due to lamp failure could not be avoided.

Further, as a danger other than the lamp rupture,
When driving the lamp with the lamp ruptured or the lamp unit not inserted, a high voltage may be generated in the high-pressure discharge lamp lighting device, which may cause electric shock to the user or damage to the image display device. Was. Therefore, in order to avoid these dangers, it is necessary to design an explosion proof against lamp explosion and to secure a sufficient space distance against high pressure from the high pressure discharge lamp lighting device, and to use a special purpose to detect the non-insertion of the lamp unit. It was necessary to add a detection switch and a mechanical structure.

The present invention solves the above problems, and provides a projection-type image display device and a lamp unit that can be used regardless of the type of lamp and that can avoid danger to users and equipment. Aim.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a lamp unit having an optimum lamp operation such as a rated wattage, a changeable wattage range, an appropriate lighting frequency, and a correction value of a circuit loss. A storage means for storing conditions is arranged, and a control means for reading out the optimum lighting condition of the lamp stored in the storage means and automatically performing the optimum lighting drive is provided on the image display apparatus main body side, thereby providing a plurality of control elements having different characteristics. In this case, different types of lamps can be used with a single type of lamp unit.

Further, according to the present invention, an identification means for identifying the type of the lamp is arranged in the lamp unit, and optimal lighting conditions corresponding to various lamps are preliminarily stored in the image display device main body, and the identification means is used for identification. By providing control means that automatically performs optimal lighting drive according to the type of lamp
A plurality of types of lamps having different characteristics can be used in a single type of lamp unit.

Further, the present invention provides the control means with a function of detecting whether the lamp unit is not inserted, the lamp is abnormal, or the lamp rupture from the lamp lighting time or the voltage / current value.
This makes it possible to avoid turning on the lamp in an unstable state.

That is, the present invention according to claim 1 is a projection type image display apparatus using a replaceable lamp as a light source for image projection, comprising a detachable lamp having storage means for storing at least a lamp and its optimum lighting condition. It is characterized by comprising a flexible lamp unit and control means for reading out the optimum lighting condition of the lamp stored in the storage means of the lamp unit and lighting the lamp under the read out optimum lighting condition.

According to a second aspect of the present invention, there is provided a projection-type image display device using a replaceable lamp as a light source for image projection, wherein a detachable lamp unit having an identification means for identifying the lamp and its type. And control means for storing the optimum lighting conditions of various lamps in advance, reading the type of the lamp identified by the identification means of the lamp unit, and lighting the lamp under the optimal lighting conditions according to the read type of the lamp. It is characterized by having.

According to the first or second aspect of the present invention, since the optimum lighting condition for each lamp is determined and the lamp is lit under the condition, a plurality of types of lamps having different characteristics can be provided by a single type of lamp unit. It can be used. Here, the optimum lighting condition is a phrase including at least a rated wattage, a wattage range that can be changed, an appropriate lighting frequency, and a correction value of a circuit loss.

According to a third aspect of the present invention, in the projection type image display device according to the first or second aspect, the control means controls a lighting state such as a lighting time of the lamp and a voltage / current value. It is characterized in that monitoring is performed, the state of the lamp is determined from the monitoring result, and the turning on and off of the lamp is controlled based on the determination result.

According to a fourth aspect of the present invention, in the projection type image display device according to the first aspect, the control means monitors the voltage / current value of the lamp, and when the lamp is turned off, the voltage / current value immediately before the lamp is turned off. The voltage / current value is read out from the storage unit of the lamp unit when the lamp is turned on, and the read voltage / current value is used as an initial value to determine the lamp voltage per unit time from the sequentially obtained voltage / current value. A change is calculated, and the lamp is forcibly turned off when a sudden change exceeding a predetermined value is calculated.

According to a fifth aspect of the present invention, in the projection type image display device according to the first aspect, the control means monitors the lighting time of the lamp and writes the immediately preceding lighting time in the storage means of the lamp unit when the lamp is turned off. Prior to the subsequent lighting of the lamp, the lighting time of the lamp is read from the storage means of the lamp unit, the remaining life of the lamp is calculated, and the lamp is lit when the remaining life is available.

According to the third to fifth aspects of the present invention, it is possible to avoid the danger to the user and the equipment caused by the rupture or non-mounting of the lamp. The present invention according to claim 6 is:
A lamp unit having a lamp and storage means for storing an optimal lighting condition and a lighting state thereof, and which is detachably mounted on a projection type image display device as a light source for image projection.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a projection type image display device according to an embodiment of the present invention. This projection type image display device includes an image display device main body 1 and a high pressure discharge lamp lighting device 2.
And a lamp unit 3 are housed inside a box (not shown).

The image display device main body 1 includes an R LCD panel 4, a G LCD panel 5, a B LCD panel 6, and an L
A CD drive 7 for modulating light from the lamp unit 3 with an image signal input to the LCD drive 7 and projecting the modulated light onto a screen (not shown) to display a color image. Have been.

The image display device body 1 further includes a fan 8 and a fan drive 9 for controlling the rotation of the fan, an operation panel 10, and an LCD drive 7 and a fan drive 9 based on a command from the operation panel 10. A controller 11 for controlling is arranged. Controller 1
1 has a timer 11a.

The high-pressure discharge lighting device 2 includes a lamp control controller 12, a lamp drive circuit 13, and a lamp voltage / power meter 14. Lamp control controller 12
Is the communication bus 1 to the controller 11 of the image display device main body 1.
5 are connected.

The lamp unit 3 has a lamp 16 and storage means 17. The lamp 16 is connected to a lamp drive circuit 13 of the high-pressure discharge lighting device 2 by a connector 18 to receive power supply, and a storage unit 17 is connected to the controller 11 of the image display device main body 1 through a communication bus 19. I have.

The storage means 17 stores the optimum lighting conditions (rated wattage, changeable wattage range, proper lighting frequency, correction value of circuit loss) and lighting conditions (lamp lighting time, voltage / current). Value) and the like can be recorded and rewritten.

The controller 11 has a function of reading and writing from and to the storage means 17 and an arithmetic function, and together with the high-pressure discharge lighting device 2, constitutes the control means described in the claims. Is what you do.

The operation of the above configuration will be described. When the lamp unit 3 is mounted on the image display device main body 1 and the high-pressure discharge lighting device 2, and the lamp is instructed from the operation panel 10, the controller 11 reads the circuit from the storage unit 17 of the lamp unit 3 through the communication bus 19. Data such as a loss correction value, an appropriate lighting frequency, an appropriate wattage, and a changeable wattage range are read.

Next, the controller 11 controls the rotation speed of the fan 8 through the fan drive 9 based on the read data so that the image display device main body 1 is appropriately cooled. Further, the controller 11 determines from the read data whether or not the lamp can be turned on based on the history of whether or not the lamp has been inserted and the lighting time up to the previous time / abnormal light off, and if there is no problem, communicates data such as the lighting conditions. Lamp control controller 1 of high-pressure discharge lighting device 2 through bus 15
Send to 2.

Thus, the lamp control controller 12
Controls the lamp drive circuit 13 based on the input data so as to obtain the optimum wattage and lighting frequency, and turns on the lamp 16. Controller 1 for lamp control
2 constantly monitors the lamp voltage during lighting through the lamp voltage / ammeter 14 and sends the data to the controller 11 through the communication bus 15.

On the other hand, the controller 11 reads out the lamp voltage value from the input data from the lamp control controller 12 and measures the time between the readings with the timer 11a. By reading the lamp voltage value and the cumulative lighting time of
Calculate the voltage fluctuation per unit time.

The controller 11 turns off the lamp 16 through the lamp control controller 12 and the lamp drive circuit 13 when the calculated value of the lamp voltage suddenly rises or falls below a predetermined value. Here, the lamp voltage is generally 40 to 130 V, depending on the lamp.
Is normal in the range, and therefore, for example, if there is a fluctuation of ± 10 V or more / min, it is determined to be abnormal, and even if it is stable, it is determined to be abnormal at 40 V or less and 130 V or less.

At the same time, the controller 11 displays the error by lighting or blinking the error display LED attached to the image display device main body 1 (the error type (lamp voltage abnormality, lamp (Lighting abnormalities, etc.) may be displayed numerically.) The error information is written into the storage unit 17 of the lamp unit 3 and thereafter, the lamp 16 is disabled.

That is, when the lamp 16 starts to expand due to abnormal thermal stress, the lamp voltage tends to increase sharply, and when the gas sealed in the lamp 16 decreases due to slow leak, the lamp voltage decreases. If such a lamp 16 is used as it is, the possibility of explosion increases. Therefore, an abnormality is detected using the lamp voltage as an index, and the lamp 16 is turned off to avoid the risk of explosion. If the lamp 16 is ruptured for some reason, the lamp voltage is opened and an abnormal value, for example, 200 V or more is detected instantaneously in the circuit. The data is written in the storage unit 17 of the unit 3.

If no sudden change in the lamp voltage is detected, the controller 11 sets the cumulative lighting time based on the immediately preceding lamp voltage and the value measured by the timer 11a when the lamp is turned off according to an instruction from the operation panel 10. Is transmitted to the storage means 17 via the communication bus 19, and the lamp voltage and the accumulated lighting time recorded at the end of the previous lighting are rewritten.

Therefore, when the operation panel 10 instructs to turn on the lamp, the controller 11 reads the information in the same manner as described above and turns on the lamp 16 through the high-pressure discharge lighting device 2, or the lamp unit 3 If there is no information even when trying to read the information without mounting, or if inappropriate information such as the above-described abnormal lamp voltage is written, the information is not output to the high-pressure discharge lighting device 2. Therefore, when the lamp 16 is in an unstable state, a high voltage for lighting is not generated in the high-pressure discharge lighting device 2.

Therefore, a plurality of types of lamps 16 having different characteristics can be mounted on a single type of projection type image display apparatus with a single type of lamp unit 3 and automatically without bothering the user. It is possible to set the optimum lighting conditions, and does not put the user or the equipment at risk. When the lamp is replaced, the lamp is detached and attached in units of lamp units, so that it is safer than in the case of handling in units of lamps.

In the above-described embodiment, a rewritable EEPROM is used as the storage means 17, but a ROM storing only the optimum lighting conditions of the lamp 16 may be used instead. In this case, the controller 11
Reads the optimal lighting conditions of the lamp 16 stored in the ROM and transfers the data to the lamp control controller 12 of the high-pressure discharge lighting device 2 to automatically perform the optimal lighting drive. Therefore, also in this case, a plurality of types of lamps having different characteristics can be used in a single type of lamp unit. However, since the lamp voltage and the cumulative lighting time cannot be updated at the end of lighting, it is necessary for the user to manage the cumulative lighting time, to design an explosion-proof lamp for bursting, and to secure a sufficient space distance for high pressure. The lamp non-insertion can be determined by the absence of any data from the ROM.

Further, instead of the storage means 17, the lamp 1
Identification means 20 for identifying the six types may be provided. As the identification means 20, a bar code reader for reading a bar code recorded in advance on the lamp 16 or a board provided with a 6-pin connector, for example, which can be combined with a short jumper arrangement, can be used. In this case, the optimal lighting conditions for each type of lamp 16 are stored in the controller 11, and the data of the optimal lighting conditions according to the type of the lamp 16 identified by the identification means 20 are sent to the lamp control controller 12. , The optimal lighting drive is automatically performed.

Although not particularly mentioned in the above embodiment, the projection type image display device may be configured as a rear projection type television for projecting a screen from the back side or a data projector for projecting from the front side. Can be. In a single-panel projection image display device, the LCD panel is 1
One.

[0039]

As described above, according to the present invention, the optimum lighting condition of the lamp is stored in the lamp unit or the main body of the image display device, thereby automatically setting the optimum lighting condition according to the type of the lamp. Is possible,
A plurality of types of lamps having different characteristics can be used in a single type of lamp unit. Therefore, it is possible to streamline product development and reduce costs by using a single type of lamp unit.

Further, since the lighting state of the lamp is monitored to detect the explosion within the life of the lamp, the risk of explosion, and the non-mounting of the lamp, the lighting and extinguishing are controlled. Danger can be avoided.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a projection type image display device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image display main body 2 High-pressure discharge lighting device 3 Lamp unit 11 Controller 14 Lamp voltage / ammeter 16 Lamp 17 Storage means 20 Identification means

Claims (6)

[Claims] 1. A projection type image display device using a replaceable lamp as a light source for image projection, comprising: a detachable lamp unit having a storage means for storing at least a lamp and an optimum lighting condition thereof; A projection type image display device comprising: a control unit for reading out the optimum lighting condition of the lamp stored in the storage unit of the unit and lighting the lamp under the read out optimum lighting condition. 2. A projection type image display device using a replaceable lamp as a light source for image projection, comprising: a detachable lamp unit having a lamp and an identification means for identifying a type thereof; Control means for storing conditions in advance, reading the type of the lamp identified by the identification means of the lamp unit, and lighting the lamp under the optimal lighting condition according to the type of the read lamp. . 3. The control means includes: a lighting time of the lamp, a voltage /
3. The projection type image according to claim 1, wherein a lighting state such as a current value is monitored, a state of the lamp is determined based on the monitoring result, and the turning on and off of the lamp is controlled based on the determination result. Display device. 4. The control means monitors the voltage / current value of the lamp, writes the immediately preceding voltage / current value in the storage means of the lamp unit when the lamp is turned off, and reads the voltage / current value from the storage means of the lamp unit when the lamp is subsequently turned on. / Read the current value,
Using the read voltage / current value as an initial value, a change in lamp voltage per unit time is calculated from successively obtained voltage / current values, and when a sudden change exceeding a predetermined value is calculated, the lamp is forcibly forced. Claim 1 configured to turn off the light
The projection type image display device according to the above. 5. The control means monitors the lighting time of the lamp, writes the immediately preceding lighting time in the storage means of the lamp unit when the lamp is turned off, and stores the lighting time of the lamp from the storage means of the lamp unit before the subsequent lighting of the lamp. reading,
2. The projection type image display device according to claim 1, wherein a remaining life of the lamp is calculated, and the lamp is turned on when there is a remaining life. 6. A lamp unit having a lamp and storage means for storing an optimum lighting condition and a lighting state thereof, and being detachably mounted on a projection type image display device as a light source for image projection.