JP2012173450A - Projector and control method of projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector, when a commercial power is supplied and cut off in a short time with respect to the projector that is set to a direct ON mode, alarming it at the next start-up.SOLUTION: In a state where the direct ON mode is set to a mode setting section 21a, when a time from a power supply cut-off time 31a to this power supply feeding time 31c is within a time T1 in starting a projector 1, or a time from a last power supply feeding time 31b to the power supply cut-off time 31a is within a time T2, an alarm message M1 or an alarm message M2 is projected onto an image projection section 10.

Description

  The present invention relates to a projector and a projector control method.

  Conventionally, when power is supplied from a power source such as a commercial power source (AC power source) in a projector (hereinafter, sometimes referred to as “supplying commercial power”), the light source of the projector is turned on for projection. There is known a mode having a mode for starting (hereinafter referred to as “direct on mode”). According to the projector having such a direct-on mode, projection is started only by supplying commercial power, so that a power-on operation using the power key is not necessary. Therefore, for example, when a plurality of projectors are used in combination, or when a projector is used in combination with other devices, it is possible to perform power on and power off collectively as a system, which is effective. .

  In projectors equipped with such a direct-on mode, commercial power is cut off due to a momentary power failure, etc., and power is immediately restored and power supply is resumed. When power supply and interruption are repeated in a short time, a load is applied to the light source lamp, which may cause abnormal lighting or failure, or affect the life.

  Patent Document 1 discloses a power management mode in which, when activated by AC on start (direct on mode), when a state where no image input signal is present continues for a predetermined time, the light source lamp is turned off and a standby state is entered. An image display device (projector) provided is disclosed.

JP 2007-72322 A

  However, even in such a projector, in an installation environment in which an image signal is always input to the projector, no power management mode is set because no signal is not generated. As a result, the power is not turned off and the direct on mode setting is continued, so it starts every time power is supplied, and if power supply and shutoff are repeated for a short time, the light source lamp The problem that there is a risk of causing a load and causing a failure or affecting the lamp life could not be solved.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example is a projector having an image projection unit that modulates and projects light emitted from a light source according to image information, and the power is supplied from a power source. A mode setting unit capable of setting either a direct-on mode in which the light source is turned on or a normal mode in which the light source is not turned on to enter a standby state when the power is supplied, and the projector A time storage unit that stores a power supply time when the power is supplied and a power shutdown time when the power supply to the projector is cut off, a time storage unit that measures the time and records the time in the time storage unit, and an input An input operation unit that receives an operation; and a control unit that controls the operation of the projector, wherein the time measuring unit supplies the power to the projector. The power supply time for the current time and the previous two times are stored in the time storage unit, and the time keeping unit shuts off the power supply to the time storage unit when the power supply to the projector is cut off. The control unit saves the time, and when the direct-on mode is set in the mode setting unit, the control unit sets a first time from the power-off time to the current power supply time when the projector is activated. When the time is within the time, or when the time from the previous power supply time to the power cut-off time is within a second time, the image projection unit is caused to project a warning message.

  According to this application example, when power is supplied again from the power source to the projector after a short period of time and when power is supplied from the power source to the projector for a short time. When the power supply is cut off (power supply is cut off), a warning message is projected at the next startup. As a result, it is possible to notify the user that power supply or interruption has occurred in a short period of time due to a momentary power failure or power supply wiring failure, etc., and to promote countermeasures, thereby reducing the load on the light source lamp. It is possible to reduce the occurrence of failure and the influence on the lamp life.

  Application Example 2 In the projector according to the application example described above, when the control unit does not detect a predetermined input operation within a predetermined time in a state where a warning message is displayed, the control unit sets the mode setting unit to the normal setting unit. The mode is set.

  According to this application example, when the projector is supplied with power again in a short time after the power is cut off, and when the projector is cut off from the power source within a short time after the power is supplied to the projector. After detecting and projecting a warning message at the next start-up, if a predetermined operation is not detected within a predetermined time, the direct-on mode is canceled and the normal mode is set. As a result, power supply and interruption in a short time due to instantaneous power failure or power supply wiring failure occur, and even if the user is not aware of the warning message, the direct on mode is canceled, so by supplying power from the next power supply, It is possible to avoid starting up the projector.

  Application Example 3 In the projector according to the application example described above, if the control unit does not detect a predetermined input operation within a predetermined time in a state where the warning message is displayed, the control unit sets the mode setting unit. After the normal mode is set, the projector is turned off.

  According to this application example, when power is supplied from the power source again in a short time after the projector is cut off from the power source, and from the power source in a short time after power is supplied from the power source to the projector. After detecting the case of being interrupted and giving a warning at the next start-up, if the specified operation is not detected within the specified time, the direct on mode is canceled and the normal mode is set and the projector is turned off. To do. As a result, even if the power supply is interrupted in a short time due to a momentary power failure or power supply failure, even if the user is not aware of the warning message, the direct on mode is canceled and the power is turned off. After the occurrence of an abnormality such as a wiring failure, the projector continues to be projected and it is possible to avoid the lamp from being consumed.

  Application Example 4 A projector control method according to this application example is a projector control method including an image projection unit that modulates and projects light emitted from a light source according to image information, and power is supplied from a power source. A mode setting that can be set to either a direct-on mode in which the light source is turned on when it is supplied or a normal mode in which the light source is not turned on to enter a standby state when the power is supplied. A time storage unit that stores a power supply time when the power is supplied to the projector, and a power shut-off time when the power supply to the projector is cut off, and measures the time and records the time in the time storage unit A timing unit that controls the operation of the projector, and when the power is supplied to the projector, A power supply time storage step for storing two power supply times in the time storage unit, and a power cutoff time storage for storing the power cutoff time in the time storage unit when the power supply to the projector is interrupted And in a state where the direct on mode is set in the mode setting unit, when the projector is activated, a time from the power shut-off time to the current power supply time is within a first time, or A projection step of causing the image projection unit to project a warning message when the time from the previous power supply time to the power shut-off time is within a second time.

  According to this application example, when power is supplied from the power source again in a short time after the supply of power to the projector is interrupted, and when power is supplied to the projector, power is supplied in a short time. Detects when it is blocked and projects a warning message at the next startup. As a result, it is possible to notify the user that power supply or interruption has occurred in a short time due to a momentary power failure or power supply wiring failure, etc., and to take countermeasures.

The block diagram which shows the circuit structure of a projector. The flowchart which shows operation | movement of a projector. (A) shows the operation when supplying commercial power, and (b) shows the operation when shutting off the commercial power. Projector warning message. (A) shows a warning message M1, and (b) shows a warning message M2.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the following embodiment does not limit the invention according to the scope of claims, and all combinations of features in the embodiment are based on the invention. It is not always essential to the solution.

(First embodiment)
FIG. 1 is a block diagram illustrating a circuit configuration of the projector according to the present embodiment.
As shown in FIG. 1, the projector 1 includes an image projection unit 10, a control unit 20, a storage unit 21, a light source control unit 22, an input operation unit 23, an image signal input unit 5, an image signal processing unit 3, and an OSD processing unit 4. , A power terminal 6, a power supply unit 7, a time measuring unit 30, a time storage unit 31, and the like, which are accommodated in a housing (not shown).

  The image projection unit 10 includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive unit 14, and the like. The image projection unit 10 modulates the light emitted from the light source 11 with the liquid crystal light valves 12R, 12G, and 12B and projects the light from the projection lens 13 to display an image on the screen SC or the like.

  The light source 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. ing. Light emitted from the light source 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue, which are the three primary colors of light, by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 12R, 12G, and 12B, respectively.

The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. The liquid crystal light valves 12R, 12G, and 12B are formed with a plurality of pixels (not shown) arranged in a matrix, and a driving voltage can be applied to the liquid crystal for each pixel.
When the liquid crystal driving unit 14 applies a driving voltage corresponding to the input image information to each pixel, each pixel is set to a light transmittance corresponding to the image information. For this reason, the light emitted from the light source 11 is modulated by transmitting through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light.
The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

In the present embodiment, the projector 1 that projects using a lamp as the light source 11 is exemplified. However, the present invention can also be applied to a projector that projects using a light emitting diode (LED) light source or a laser light source as the light source. it can.
In the present embodiment, the image projection unit 10 exemplifies a transmissive liquid crystal type projection optical system using the light source 11 and the three liquid crystal light valves 12R, 12G, and 12B as light modulation devices. You may employ | adopt the light modulation apparatus of other display systems, such as a display system and a micromirror device system (light switch display system).

  The control unit 20 includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory) used for temporary storage of various data, and the like, according to a control program (not shown) stored in the storage unit 21. By operating, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21. Further, the control unit 20 is provided with a timer 20a for measuring time.

The storage unit 21 is configured by a rewritable nonvolatile memory such as a flash memory or FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various setting data for defining operation conditions of the projector 1, and the like.
In the present embodiment, the mode setting unit 21 a is stored in the storage unit 21 as setting data. The mode setting unit 21a enters a direct-on mode in which the light source 11 is turned on when the projector 1 is supplied with commercial power, or a standby state without turning on the light source 11 when commercial power is supplied. This is information indicating which mode is switched to the normal mode. That is, it is information about whether or not the setting of the direct on mode is valid. The mode setting unit 21a is set by the control unit 20.

The input operation unit 23 includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the input operation unit 23 include a power key for alternately switching on / off the power, an input switching key for switching a plurality of image input terminals input to the image signal input unit 5, and various settings. There are a menu key for superimposing a setting menu for performing, a cursor key for selecting a setting item from the menu, a determination key, an escape key, and the like. When the user operates various operation keys of the input operation unit 23, the input operation unit 23 outputs an operation signal corresponding to the operation content of the user to the control unit 20.
The input operation unit 23 may include a remote controller (remote control) signal receiving unit and a remote controller that can be remotely operated. In this case, the remote controller emits an operation signal such as an infrared ray according to the operation content of the user, and the remote control signal receiving unit receives this and transmits it to the control unit 20 as control information.

  As described above, the image signal input unit 5 includes a plurality of image input terminals. From each image input terminal, image information is input from an external image output device such as a video playback device or a personal computer via a cable (not shown). Is entered.

  The image signal processing unit 3 converts the image information input from the image signal input unit 5 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B. Here, the converted image information is for each color light of R, G, and B, and is composed of a plurality of pixel values corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B. The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted is defined by this pixel value.

The OSD processing unit 4 performs a process for superimposing and displaying an OSD (on-screen display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing unit 4 includes an OSD memory (not shown) and stores OSD image information representing graphics, fonts, and the like for forming an OSD image.
When the control unit 20 instructs OSD image superimposition display, the OSD processing unit 4 reads necessary OSD image information from the OSD memory, and outputs an image signal so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image information is combined with the image information input from the processing unit 3. The image information combined with the OSD image information is output to the liquid crystal drive unit 14.
If there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 4 outputs the image information input from the image signal processing unit 3 to the liquid crystal drive unit 14 as it is.

  The liquid crystal driving unit 14 is an image forming unit in the present embodiment. When the liquid crystal light valves 12R, 12G, and 12B are driven according to the image information input from the OSD processing unit 4, the liquid crystal light valves 12R, 12G, and 12B are displayed as image information. An image corresponding to the above is formed, and this image is projected from the projection lens 13.

  A commercial power supply such as AC 100 V is supplied to the power supply unit 7 from the outside via the power supply terminal 6. The power source unit 7 converts, for example, AC power from an AC power source (AC power source) as a power source such as a commercial power source into DC of a predetermined voltage and supplies DC power to each unit of the projector 1. In addition, the power source unit 7 stops supplying power (operating power) necessary for projecting an image to each unit (power on state) and stops supplying operating power based on an instruction from the control unit 20. It is possible to switch between a state (standby state) of waiting for an operation for turning on. Hereinafter, “power supply” may be referred to as “power supply”.

  The time measuring unit 30 is configured by a real-time clock or the like backed up by a battery or the like (not shown), detects whether commercial power is supplied to the power unit 7 or whether supply of commercial power to the power unit 7 is cut off, and the time Is recorded in the time storage unit 31.

  The time storage unit 31 includes a RAM (not shown) and the like, and is backed up by a battery (not shown) as with the time measuring unit 30. The time storage unit 31 includes a power shut-off time 31a indicating a time when the supply of commercial power to the projector 1 is shut off, a previous power supply time 31b indicating a time when the commercial power is supplied to the projector 1 last time, and a projector 1 This time, the current power supply time 31c indicating the time when the commercial power is supplied is stored.

  The light source control unit 22 controls supply and stop of power to the light source 11 based on an instruction from the control unit 20 and switches between turning on and off the light source 11.

Next, the operation of the projector 1 of the present embodiment will be described using the flowchart of FIG.
[Operation when supplying commercial power]
FIG. 2A is a flowchart showing an operation when commercial power (AC power) is supplied to the projector 1.
As shown in FIG. 2A, when commercial power (AC power) is supplied to the projector 1 (step S101), the time measuring unit 30 supplies the time stored in the current power supply time 31c to the previous power supply. Save at time 31b (step S102). Next, the current time is stored in the current power supply time 31c (step S103), and the process proceeds to step S104.

  In step S104, the control unit 20 checks whether or not the direct on mode is set in the mode setting unit 21a. When the direct on mode is set in the mode setting unit 21a (step S104: Y), the process proceeds to step S105. When the direct on mode is not set in the mode setting unit 21a, that is, when the normal mode is set (step S104: N), the mode setting unit 21a shifts to a standby state (step S106), and the operation of this flow is finished.

  In step S105, the control unit 20 causes the light source control unit 22 to turn on the light source 11 (light source lamp 11a), activates the projector 1 (power ON), and proceeds to step S107.

  In step S107, the control unit 20 checks whether or not the difference between the current power supply time 31c and the power cutoff time 31a is within a time T1 (for example, 2 seconds). When the difference is within the time T1 (step S107: Y), the warning message M1 is projected on the image projection unit 10 (step S110), and the process proceeds to step S111. The warning message M1 at this time is shown in FIG. On the other hand, when the difference is larger than the time T1 (step S107: N), the process proceeds to step S108.

  In step S108, the control unit 20 checks whether the difference between the power cutoff time 31a and the previous power supply time 31b is within a time T2 (for example, 5 seconds). If the difference is within the time T2 (step S108: Y), the warning message M2 is projected on the image projection unit 10 (step S109), and the process proceeds to step S111. The warning message M1 at this time is shown in FIG. On the other hand, when the difference is larger than the time T2 (step S108: N), the process proceeds to step S117.

  In step S111, the control unit 20 starts measuring time by the timer 20a, and proceeds to step S112.

  In step S112, the control unit 20 checks whether or not the input operation unit 23 has detected a predetermined input operation. When a predetermined input operation is detected (step S112: Y), the warning message M1 or the warning message M2 is deleted (step S115), and the process proceeds to step S116. On the other hand, when the predetermined input operation is not detected (step S112: N), the process proceeds to step S113.

  In step S113, the control unit 20 checks whether or not the time measured by the timer 20a has passed a time T3 (for example, 10 seconds). When the timer 20a has passed the time T3 (step S113: Y), the process proceeds to step S114. If the timer 20a has not elapsed the time T3 (step S113: N), the process proceeds to step S112.

  In step S114, the control unit 20 sets the mode setting unit 21a to the normal mode, and proceeds to step S116.

  In step S116, the control unit 20 stops timing of the timer 20a, and proceeds to step S117.

  In step S117, the control unit 20 causes the image projection unit 10 to project the image signal input from the image signal input unit 5, and ends this flow.

[Operation when supplying commercial power]
FIG. 2B is a flowchart showing an operation when the supply of commercial power (AC power) to the projector 1 is interrupted.
As shown in FIG. 2B, when the supply of commercial power (AC power) to the projector 1 is cut off (step S201), the time measuring unit 30 stores the current time as the power cut-off time 31a (step S202). . This is the end of the operation of this flow (step S203).

  As described above, according to the projector 1 of the present embodiment, when commercial power is supplied again in a short time after the supply of commercial power to the projector 1 is interrupted, and commercial power is supplied to the projector. Detects when the commercial power supply is cut off within a short period of time, and issues a warning at the next startup. As a result, it is possible to notify the user that power supply or shut-off has occurred within a short period of time due to a momentary power failure, power supply wiring failure, or the like, thereby prompting countermeasures.

  If the predetermined operation is not detected within a predetermined time after performing the above-described warning, the direct-on mode is canceled and the normal mode is set. As a result, even if the power supply or shut-off occurs in a short time due to an instantaneous power failure or power supply wiring failure, and the user is not aware of the warning message, the direct on mode is canceled. Can be avoided.

Moreover, you may change the said embodiment as follows.
(Modification 1)
In the above embodiment, after the warning message M1 or the warning message M2 is displayed, if there is no predetermined operation within a predetermined time, the projector 1 is turned off after the normal mode is set in the mode setting unit 21a. You may make it transfer to a standby state. Thereby, when there is no response to the warning, it is possible to turn off the power and prevent the lamp from being consumed.

  In the above description, the commercial power source is used as the power source. However, the power source is not limited to this, and for example, power from a power source such as a storage battery or a private power generator may be used.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 3 ... Image signal processing part, 4 ... OSD processing part, 5 ... Image signal input part, 6 ... Power supply terminal, 7 ... Power supply part, 10 ... Image projection part, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve, 13... Projection lens, 14. Power cut-off time, 31b ... Last power supply time, 31c ... Current power supply time.

Claims (4)

A projector having an image projection unit that modulates and projects light emitted from a light source according to image information,
Set either direct on mode to start by turning on the light source when power is supplied from the power source, or normal mode to enter standby mode without turning on the light source when the power is supplied Possible mode setting part,
A time storage unit that stores a power supply time when the power is supplied and a power supply cutoff time when the power supply is cut off;
A timekeeping unit that measures time and records the time in the time storage unit;
An input operation unit for detecting an input operation;
A control unit for controlling the operation;
With
When the power is supplied, the timekeeping unit stores the current power supply time and the power supply time for two times of the previous power supply time in the time storage unit,
When the power supply to the projector is interrupted, the timekeeping unit stores the power-off time in the time storage unit,
In the state where the direct-on mode is set in the mode setting unit, the control unit, when activated, when the time from the power shut-off time to the current power supply time is within a first time, or A projector that causes the image projection unit to project a warning message when the time from the previous power supply time to the power-off time is within a second time. The projector according to claim 1,
The control unit sets the mode setting unit to the normal mode when a predetermined input operation is not detected within a predetermined time in a state where the warning message is displayed. The projector according to claim 1,
When the control unit does not detect a predetermined input operation within a predetermined time while the warning message is displayed, the control unit sets the mode setting unit to the normal mode and then turns off the power of the projector. A projector characterized by that. A method for controlling a projector having an image projection unit that modulates and projects light emitted from a light source according to image information,
Set either direct on mode to start by turning on the light source when power is supplied from the power source, or normal mode to enter standby mode without turning on the light source when the power is supplied Possible mode setting part,
A time storage unit that stores a power supply time at which the power is supplied to the projector, and a power-off time at which the power supply to the projector is interrupted;
A timekeeping unit that measures time and records the time in the time storage unit;
A control unit for controlling the operation of the projector;
With
When the power is supplied to the projector, a power supply time storage step for storing the current and previous two power supply times in the time storage unit;
When the supply of power to the projector is interrupted, a power-off time storage step of storing the power-off time in the time storage unit;
In a state where the direct on mode is set in the mode setting unit, when the projector is started, when the time from the power shut-off time to the current power supply time is within a first time, or the previous power supply A projection step of causing the image projection unit to project a warning message when the time from the supply time to the power shut-off time is within a second time.

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