Image output device, power abnormality notification method and program

Abstract

To provide an image output device, a power abnormality notification method and a program that can notify a user of inadequate power supply in a more understandable manner.SOLUTION: An image output device comprises: an image output unit; an adjustment unit that supplies power to each unit on the basis of power which is input from an outside; and a control unit. The control unit causes the adjustment unit to supply power to the image output unit, to perform a first notification operation displaying that input power is inadequate by means of the image output unit when the input power is not in a normal first reference range and is in a second reference range associated with an operation propriety of the image output unit, the second reference range being wider than the first reference range.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to an image output device, a power abnormality notification method, and a program. [Background technology]

[0002] There are image output devices that receive image data from an external source and display and output the image, such as a projector (projection device) that outputs an image by enlarging and projecting it. Projectors are portable and used in a variety of places. Many projectors are supplied with power by converting commercial power into appropriate power via a detachable adapter (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-076964 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in such an image output device, there are cases where inappropriate power is input from a similar incompatible adapter, etc. In such cases, not only can projection not be performed normally, but it can also cause a breakdown. In addition, there are cases where the user is not aware that the power input is inappropriate, and there is a need to inform the user in an easy-to-understand manner.

[0005] An object of the present invention is to provide an image output device, a power abnormality notification method, and a program that can notify a user of an inappropriate power supply in a manner that is easier for the user to understand. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides an image output unit that outputs an image; an adjustment unit that supplies power to each unit based on power input from an external source; A control unit; Equipped with The control unit is When the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to the operation of the image output unit, the adjustment unit is made to supply power to the image output unit and a first notification operation is made to cause the image output unit to display that the input power is inappropriate. An image output device. Effect of the Invention

[0007] According to the present invention, it is possible to notify a user of an inappropriate power supply in an image output device in a manner that is easier for the user to understand. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an external appearance of an image output device. [Diagram 2] FIG. 2 is a block diagram showing a functional configuration of the image output device. [Diagram 3] FIG. 2 is a diagram illustrating a configuration of a power supply unit of the image output device. [Figure 4] FIG. 2 is a diagram illustrating an input voltage and a reference voltage. [Diagram 5] 10A and 10B are diagrams illustrating a start-up operation of an image output device when power is normally supplied. [Figure 6] 11A and 11B are diagrams illustrating a start-up operation of an image output device when a power supply abnormality occurs. [Figure 7] 11A and 11B are diagrams illustrating a start-up operation of an image output device when a power supply abnormality occurs. [Figure 8] 11A and 11B are diagrams illustrating a start-up operation of an image output device when a power supply abnormality occurs. [Figure 9] 11A and 11B are diagrams illustrating a start-up operation of an image output device when a power supply abnormality occurs. [Figure 10]13A and 13B are diagrams illustrating examples of an overvoltage warning screen and a low power warning screen. [Figure 11] 5 is a flowchart showing a control procedure for a startup control process of the image output device. [Figure 12] 13 is a flowchart showing a control procedure of a power monitoring control process. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the appearance of an image output device 1 of this embodiment. The image output device 1 is a projection device (projector) that has a light exit port 16a on the front surface of the housing and outputs an image from the exit port 16a and projects it onto a screen, a wall surface, or the like. An operation panel 15a is located on the top surface of the housing, and push button switches, LED lamps (Light Emitting Diodes), and the like are arranged. The type of switch is not limited to a push button switch, and may include, for example, a rocker switch, a slide switch, and the like. The LED lamps include an overvoltage notification LED 1921 and a low power notification LED 1922, which will be described later.

[0010] The image output device 1 is supplied with power from an adapter 92 via a cable 82. The adapter 92 may receive power from a terminal (outlet) of a commercial power source 91 via a cable 81.

[0011] FIG. 2 is a block diagram showing the functional configuration of the image output device 1 of this embodiment.

[0012] The image output device 1 includes a CPU 111 (Central Processing Unit), a media processor 112, an HDMI control circuit 113 (HDMI is a registered trademark), a memory unit 12, a RAM 13 (Random Access Memory), an input unit 14, an operation reception unit 15, a projection unit 16 (image output unit), a display drive unit 17, a cooling unit 18, an output unit 19, and a power supply unit 20.

[0013] The CPU 111 is a hardware processor that processes image data for projection by the projection unit 16 and controls the image output device 1 .

[0014] The media processor 112 is a hardware processor that generates image data for display output based on data input via a communication input terminal 142 .

[0015] The HDMI control circuit 113 decodes the data input via the HDMI terminal 141 , separates it into video data and audio data, and outputs it via the same path as the image data input from the media processor 112 .

[0016] The storage unit 12 is a non-volatile memory, and stores a display control program 121, a display setting 122, and the like. The non-volatile memory is, for example, a flash memory, but may also include a hard disk drive (HDD). The display control program 121 is an overall control program related to the operation of projecting an image by the projection unit 16 based on input image data (including video data). The display setting 122 includes data such as a preset standard display, for example, a display at start-up, a display when an abnormality in the input voltage described later is detected, and a setting menu displayed when the amount of emitted light changes.

[0017] The RAM 13 provides a working memory space for the CPU 111, the media processor 112, etc., and stores temporary data. The RAM is, for example, a DRAM. The RAM 13 may be divided into a section for image processing and a section for processing other than images.

[0018] The input unit 14 is connected to an external device and receives data input from the external device. The input unit 14 has an HDMI terminal 141, a communication input terminal 142, a communication control unit 143, and the like. The HDMI terminal 141 is a terminal for receiving an HDMI signal. The communication input terminal 142 is a terminal for receiving data via, but is not particularly limited to, a LAN (Local Area Network) or a USB (Universal Serial Bus), for example. The communication input terminal 142 is not limited to a wired connection, and may have, for example, a wireless LAN communication adapter.

[0019] The communication control unit 143 controls reception of data from each of the above terminals in accordance with each communication standard, temporarily stores the received data in the RAM 13, and also sends the received data to the media processor 112 and the HDMI control circuit 113 for processing. The communication control unit 143 may have drivers related to each communication standard.

[0020] The operation reception unit 15 receives an input operation from an external source such as a user, converts it into an input signal, and outputs the input signal to the CPU 111, etc. The operation reception unit 15 may include a push button switch included in the operation panel 15a.

[0021] The projection unit 16 includes a light emitting unit 161, an optical system 162, a rotary drive unit 163, a rotary motor 164, etc., and outputs light (projection light) corresponding to image data from the emission port 16a to output an image. Although not particularly limited, here, the light emitting unit 161 has a red (R) LED and a blue (B) LD (laser diode) (multiple color light emitting unit). The light of the blue LD is partially scattered according to the rotation angle by a scattering filter rotated by a rotary motor 164 driven and operated by the rotary drive unit 163, and is converted to green (G). The light of the three colors of RGB obtained in this way is collected to an appropriate focal position by the optical system 162, and then the reflection angle is controlled on a pixel-by-pixel basis by a digital mirror device (DMD) to switch on and off of emission from the emission port 16a, so that light corresponding to the image data is emitted.

[0022] The display driver 17 controls the operation of the DMD based on image data.

[0023] Cooling unit 18 includes air blower drive unit 181 and air blower motor 182. Air blower motor 182 is driven by air blower drive unit 181 to operate and rotate a fan for blowing air. Wind generated by the rotation of the fan cools image output device 1 by discharging heat generated mainly in projection unit 16 from air holes in the housing.

[0024] The output unit 19 performs a notification operation different from the display output by the projection unit 16. The output unit 19 has an audio output unit 191 and an LED operation unit 192 (notification operation unit). The audio output unit 191 may have a speaker and be capable of outputting various sounds, or may simply output a beep sound or the like. The LED operation unit 192 turns on the LED lamps of the operation panel 15a and the like. The lighting operation here may include intermittent lighting in a predetermined pattern, that is, a blinking operation. The LED lamps include the above-mentioned overvoltage notification LED 1921 and low power notification LED 1922.

[0025] The power supply unit 20 monitors the power (input voltage) input from the outside and supplies power of a predetermined voltage to each unit related to the operation of the image output device 1 (own device), enabling each unit to operate. The power supply from the power supply unit 20 is divided into an image-related power supply system (a part including the projection unit 16) related to image output and a non-image power supply system (other than a part) related to other than image output. The image-related power supply system includes the CPU 111, the RAM 13, the projection unit 16, the display drive unit 17, the cooling unit 18, the LED operation unit 192, etc. The non-image power supply system includes the media processor 112, the HDMI control circuit 113, the input unit 14, the audio output unit 191, etc.

[0026] FIG. 3 is a diagram showing the configuration of the power supply unit 20 of the image output device 1. As shown in FIG. The power supply unit 20 includes a protection circuit 21, a cutoff circuit 22, a voltage detection circuit 23, a voltage division circuit 24 (voltage transformer), a selector 25, and constant voltage generation circuits 26 (first supply unit) and 27 (second supply unit).

[0027] The protection circuit 21 is a circuit for protecting the internal configuration when an excessive current or the like flows in from the outside, and includes, for example, a fuse that is blown by an overcurrent, and a large capacitor that absorbs surges, etc.

[0028] When the external input voltage is too high, the cutoff circuit 22 cuts off the supply under the control of the CPU 232 of the voltage detection circuit 23. The cutoff circuit 22 may be an analog switch or the like.

[0029] The voltage detection circuit 23 includes a monitoring circuit 231 that compares the voltage of the power input to the power supply unit 20 with a plurality of reference voltages and outputs the comparison results, a CPU 232 (control unit, computer), and a program 233. Here, the reference voltages include five types of reference voltages VtL1, VtL2, VtH1, VtH2, and VtH3, which will be described later. The voltage detection circuit 23 also includes a CPU 232 (Central Processing Unit) that is a hardware processor. The CPU 232 determines whether the power input from the adapter 92 (external) is appropriate or not according to the comparison result by the monitoring circuit 231, and determines the operation of the cutoff circuit 22, the selector 25, and the constant voltage generation circuits 26 and 27 according to the determination result. The CPU 232 may be, for example, a microcomputer (microcomputer) specialized for voltage detection control, or may have a more versatile CPU, or may be an FPC (Flexible Printed Circuit), or the like.

[0030] The voltage divider circuit 24 divides the voltage of the power input to the power supply unit 20 and outputs a voltage obtained by lowering the input voltage by a certain ratio (for example, 2 / 3). The output voltage of the voltage divider circuit 24 can convert the input voltage to the power supply unit 20 into a normal voltage range even if the input voltage is somewhat higher than the normal voltage range. Note that the voltage divider circuit 24 may have a configuration that does not perform a voltage lowering operation (stops operation) when not selected by the selector 25 as described later.

[0031] The selector 25 selectively outputs the power input to the power supply unit 20 or the power divided by the voltage dividing circuit 24 to the constant voltage generating circuit 26. The selector 25 is switched under the control of the voltage detecting circuit 23.

[0032] The constant voltage generating circuits 26 and 27 are circuits that convert the input power into a predetermined voltage, output the voltage, and supply it to each unit. The constant voltage generating circuit 26 selectively receives the power input from the adapter 92 or the power output by the selector 25, and supplies a voltage for image output to the image system power supply system (for example, 12V to the rotary motor 164, the blower motor 182, etc., and 5V or 3.3V to the light emitting unit 161, the CPU 111, etc.). The constant voltage generating circuit 27 outputs an operating voltage (for example, 3.3V, etc.) to the peripheral components other than the image output to the non-image power supply system. The constant voltage generating circuits 26 and 27 are controlled independently in terms of the operation related to the power supply. In the image output device 1 of this embodiment, power can be supplied to the LED (at least a part of the LED operating unit 192) that indicates the presence or absence of power supply and an abnormality in the power supply, separately from the LED. The voltage divider circuit 24, the selector 25, and the constant voltage generating circuits 26 and 27 constitute an adjustment section of the present invention.

[0033] Next, the input voltage monitoring operation in the image output device 1 will be described. In the image output device 1, when a predetermined appropriate power supply (voltage) is not performed (outside the first reference range), it performs a notification operation regarding an abnormal power supply, and stops subsequent normal operation. In this case, if the abnormality is simply notified only by an LED lamp, the user may take time to understand the reason for the abnormality, or may not try to understand it. In the image output device 1, as this notification operation, the projection unit 16 displays characters or the like within a possible range (outside the normal first reference range and within the second reference range in which the projection unit 16 can operate), making it easier for the user to understand the reason for the abnormality. FIG. 4 is a diagram illustrating the input voltage and the reference voltage. In the image output device 1, if the voltage input from the adapter 92 is between the reference voltage VtH1 (first upper limit voltage) and the reference voltage VtL1 (first lower limit voltage), it is within the normal voltage range RN (first reference range; rated voltage). The reference voltages VtH1, VtH2 (second upper limit voltage), and VtH3 are set in order on the higher side of the normal voltage range RN, and the reference voltages VtL1 and VtL2 (second lower limit voltage) are set in order on the lower side of the normal voltage range.

[0034] The reference voltage VtL2 is a voltage necessary for stable operation of the image output device 1, and for example, if a voltage equal to or higher than the reference voltage VtL2 is not input at the time of start-up, operation will not start.

[0035] The reference voltage VtH3 is the upper limit voltage of a guaranteed range relating to prevention of breakdowns in the image output device 1, and when a voltage equal to or higher than the reference voltage VtH3 is input, the cutoff circuit 22 immediately cuts off the power supply.

[0036] The reference voltage VtH2 is a voltage at which the output voltage becomes equal to the reference voltage VtH1 when an input voltage is input to the voltage divider circuit 24. That is, when the input voltage is greater than the reference voltage VtH1 and equal to or less than the reference voltage VtH2, power is supplied from the constant voltage generation circuit 26 to the projection unit 16 and the like in response to the input of power from the voltage divider circuit 24, thereby enabling the operation of the projection unit 16 (upper limit side of the second reference range). When the input voltage is greater than the reference voltage VtH2, a voltage within the normal range is not input to the constant voltage generation circuit 26 even if the voltage divider circuit 24 is used.

[0037] The reference voltage VtL1 is a lower limit voltage set to operate the projection unit 16 normally and stably. The output voltage from the voltage divider circuit 24 of the reference voltage VtH1 is equal to or higher than this reference voltage VtL1. When a voltage lower than the reference voltage VtL1 is input to the image output device 1, the projection unit 16 does not output an image. Although the voltage itself output from the adapter 92 without load is equal to or higher than the reference voltage VtL1, when each unit starts to operate, the input voltage may drop due to a shortage of current that can be supplied to each unit. In the case of such a power shortage, the input voltage may be restored to the reference voltage VtL1 or higher by reducing the operation of the image output device 1. When the input voltage can be maintained at the reference voltage VtL1 or higher (lower limit side of the second reference range) when the power supply from the constant voltage generating circuit 27 is cut off and power is output only from the constant voltage generating circuit 26, the projection unit 16 can be operated by stopping the operation of each unit to which power is supplied from the constant voltage generating circuit 27.

[0038] In the low voltage portion RL between the reference voltages VtL1 and VtL2 and the high voltage portion RH between the reference voltages VtH1 to VtH3, the image output device 1 is started, but performs a notification operation indicating that the input voltage is inappropriate. The high voltage portion RH is further divided into a first high voltage portion RH1 between the reference voltages VtH1 and VtH2 (where the projection unit 16 can operate) and a second high voltage portion RH2 between the reference voltages VtH2 and VtH3 (where the projection unit 16 cannot operate), and the manner of notification changes for each portion. The low-voltage portion RL is divided into a first low-power portion RL1 (projection unit 16 can operate) where the voltage becomes equal to or higher than the reference voltage VtH1, and a second low-power portion RL2 (projection unit 16 cannot operate) where the voltage does not become equal to or higher than the reference voltage VtH1, depending on whether the voltage becomes equal to or higher than the reference voltage VtH1 in response to the interruption of the power supply from the constant-voltage generating circuit 27. That is, the first high-voltage portion RH1, the normal voltage range RN, and the first low-power portion RL1 are included in the second reference range.

[0039] Depending on the operation of each of the above-mentioned components, for example, the reference voltage VtL1 may be set to 14V. Assuming that the voltage divider circuit 24 reduces the voltage to 2 / 3, the reference voltage VtH1 may be set to 21V and the reference voltage VtH2 to 30V. Based on the voltage at which the LED can be turned on, the reference voltage VtH3 may be, for example, 39V and the reference voltage VtL2 is 10V. In response to these, the rated voltage output by the genuine adapter 92 may be, for example, 19V.

[0040] FIG. 5 is a diagram for explaining the start-up operation of the image output device 1 when power is normally supplied. In FIG. 5 and the following FIGS. 6 to 9, the top row indicates the input voltage from the adapter 92. The second to sixth rows indicate whether the monitoring circuit 231 detects the input of five reference voltages. H is a high level, indicating that the input of the reference voltage is detected, and L is a low level, indicating that the input of the reference voltage is not detected. In other words, the detection of the reference voltage means that the input voltage is equal to or higher than the reference voltage. The seventh row indicates the presence or absence of power supply from the constant voltage generating circuit 26 to the imaging system power supply system with on, off, and "voltage division." "Voltage division" refers to the case where power is supplied to the imaging system power supply system based on the power output from the voltage dividing circuit 24. The eighth row indicates the presence or absence of power supply from the constant voltage generating circuit 27 to the non-imaging power supply system. The bottom row indicates the presence or absence of lighting of the LED in the LED operation unit 192. "Overvoltage" indicates that the overvoltage notification LED 1921 is turned on, and "low power" indicates that the low power notification LED 1922 is turned on.

[0041] When the adapter 92 is connected to the image output device 1 and the power switch or the like is turned on, the input voltage rises with a change in time according to the parasitic capacitance of each part, including the capacitance of the capacitor of the protection circuit 21. Here, for the sake of explanation, the input voltage rises in a straight line, but this is not limited to this.

[0042] As the supply power increases, it sequentially becomes greater than the reference voltages VtL2, VtL1, and the comparison results with these reference voltages change to high level "H." When the input voltage is normal, the input voltage stops increasing at a voltage lower than the reference voltage VtH1, so the comparison results of the monitoring circuit 231 with the reference voltages VtH1, VtH2, and VtH3 remain at low level "L."

[0043] When the input voltage from the adapter 92 is greater than the reference voltage VtH3, a waiting time Tw is set that is longer than the time it is expected for the input voltage to reach the reference voltage VtH3, and when the elapsed time since the reference voltage VtL2 was detected reaches the waiting time Tw, the operation of the selector 25, the constant voltage generating circuit 26 related to the image system power output, and the constant voltage generating circuit 27 related to the non-image power output is determined based on the comparison results with the above five reference voltages.

[0044] Here, when the elapsed time reaches the standby time Tw, the reference voltage VtL1 is detected, but the reference voltage VtH1 is not detected, so it is understood that the voltage is within the normal range. Therefore, the overvoltage notification LED 1921 and the low power notification LED 1922 are not lit. As a result, the selector 25 remains in the normal state, and the output of the constant voltage generating circuit 26 is turned on to start the image system power output, and the output of the constant voltage generating circuit 27 is turned on to start the non-image power output.

[0045] FIG. 6 is a diagram for explaining the start-up operation of the image output device 1 when power is supplied at a voltage equal to or higher than the reference voltage VtH3. When an input voltage equal to or greater than the reference voltage VtH3 is present, the reference voltages VtL2, VtL1, VtH1, VtH2, and VtH3 are detected in sequence as the input voltage rises. In this case, when the input voltage of the reference voltage VtH1 is detected, the input voltage is determined to be an overvoltage, and the overvoltage notification LED 1921 starts to light up. Then, when the reference voltage VtH3 is detected, in order to prevent malfunctions and dangers, the cutoff circuit 22 is immediately operated without waiting until the waiting time Tw has elapsed, and the input voltage is cut off. When the cutoff circuit 22 is operated, no power is supplied to the overvoltage notification LED 1921 or the monitoring circuit 231, and all of them are turned off.

[0046] FIG. 7 is a diagram for explaining the start-up operation of the image output device 1 when the input voltage is in the second high voltage portion RH2 and when the input voltage is in the second low power portion RL2.

[0047] When the input voltage is in the second high voltage portion RH2, as shown by the straight lines in Fig. 7, during the standby time Tw from the detection of the reference voltage VtL2, the reference voltages VtL1, VtH1, and VtH2 are detected in that order. At the timing when the reference voltage VtH1 is detected, the overvoltage notification LED 1921, which means that an overvoltage (inappropriate power) is being input, is turned on (second notification operation). After the standby time Tw has elapsed, it is determined that the input voltage is in the second high voltage portion RH2. As a result, neither the imaging system power output nor the non-imaging power output is performed.

[0048] When the input voltage is in the second low power portion RL2, as shown by the dashed line in Fig. 7, during the waiting time Tw after the reference voltage VtL2 is detected, none of the reference voltages equal to or greater than the reference voltage VtL1 is detected. After the waiting time Tw has elapsed, it is determined that the input voltage is less than the reference voltage VtL1, the second low power portion RL2 is entered, and the low power notification LED 1922, which means that low power (inappropriate power) is being input, starts to light up (second notification operation). In this case as well, neither the imaging system power output nor the non-imaging power output is performed.

[0049] FIG. 8 is a diagram for explaining the start-up operation of the image output device 1 when the input voltage is in the first high voltage portion RH1.

[0050] During the waiting time Tw after the reference voltage VtL2 is detected, the reference voltages VtL1 and VtH1 are detected in turn. When the reference voltage VtH1 is detected, the overvoltage notification LED 1921 starts to light up.

[0051] After the waiting time Tw has elapsed, it is found that the input voltage is between the reference voltages VtH1 and VtH2 and is in the first high voltage portion RH1. In this case, non-image power output is prohibited, and the selector 25 is switched to output the output voltage of the voltage dividing circuit 24. As a result, as described above, the output voltage of the voltage dividing circuit 24 becomes equal to or lower than the reference voltage VtH1. Based on the output voltage of the voltage dividing circuit 24, only the image system power output is output from the constant voltage generating circuit 26. Since the input unit 14 does not operate, the user cannot output a desired image, and a predetermined overvoltage warning screen AH is displayed (first notification operation). While the overvoltage warning screen AH is displayed, the overvoltage notification LED 1921 is also turned on as described above. The word "in conjunction" here does not mean that they are started at the same time.

[0052] FIG. 9 is a diagram illustrating the start-up operation of the image output device 1 when the input power is insufficient. Although the output voltage of the adapter 92 under no load is within a normal range, when power is supplied to each part of the image output device 1 (both the above-mentioned parts and the rest), there are cases where the available current (power) is insufficient, causing a drop in the input voltage. As shown by the solid and dashed lines in Fig. 9, the input voltage is initially determined to be within the normal range, and the imaging system power output and the non-imaging system power output are turned on. As a result, the input voltage drops due to insufficient power, and if it falls below the reference voltage VtL1, the low power notification LED 1922 is immediately lit. In addition, the non-imaging system power output that was once turned on is turned off (power supply to parts other than the above is stopped).

[0053] If the input voltage further drops below the reference voltage VtL2, it becomes difficult to output an image, and the imaging system power output is also turned off, as shown by the dashed line. Also, even if the non-image power output is turned off, the imaging system power output is also turned off if the input voltage does not reach or exceed the reference voltage VtL1. In these cases, only the low power notification LED 1922 is turned on (second notification operation).

[0054] If the non-imaging power output is turned off and the load is reduced, and as a result the input voltage returns to the reference voltage VtL1 or higher during the recovery time TR after the imaging system power output is turned on, the imaging system output remains possible in this state, and the low power warning screen AL is displayed (first notification operation). In this case, some of the imaging system power output destinations may not be operated. For example, the low power warning screen AL may be displayed using only some colors of light (e.g., red) out of RGB. As described above, if light of green wavelengths is generated by scattering blue light, the motor that rotates the scattering filter may also be stopped when blue light is not emitted.

[0055] FIG. 10 is a diagram showing an example of an overvoltage warning screen AH and a low power warning screen AL. 10(a), the overvoltage warning screen AH clearly displays that the adapter 92 being used is supplying a voltage higher than the normal power range (the input power is inappropriate). This screen may also display the normal power range.

[0056] 10(b), the low power warning screen AL clearly displays that the power supply (voltage or current; here, current) of the adapter 92 being used is insufficient. This screen may also display the normal power range.

[0057] In this way, to the extent possible, by clearly indicating the content of the nonconformity in text rather than simply lighting up the LED by LED operation unit 192, the user can easily know the content of the notification without having to check a manual, etc. When the supplied power is significantly out of the normal range and is not within the range where display is possible, the abnormality is notified by the operation of LED operation unit 192 alone, and the user is informed that a problem has occurred.

[0058] 11 is a flowchart showing a control procedure of the startup control process of the image output device 1 executed by the CPU 232 of the voltage detection circuit 23. This startup control process, which includes the power anomaly notification method of the present embodiment, is started when the minimum power required for the operation of the CPU 232 is supplied and started.

[0059] When the startup control process is started, the CPU 232 determines whether or not the reference voltage VtL2 is detected (step S101). If it is determined that the reference voltage VtL2 is not detected ("NO" in step S101), the CPU 232 repeats the process of step S101.

[0060] If it is determined that the reference voltage VtL2 has been detected ("YES" in step S101), the CPU 232 starts counting the waiting time Tw (step S102). The CPU 232 determines whether or not the reference voltage VtH3 has been detected (step S103). If it is determined that the reference voltage VtH3 has been detected ("YES" in step S103), the CPU 232 operates the cutoff circuit 22 to cut off the power input from the adapter 92 (step S151). This stops the operation of the CPU 232, and the startup control process ends.

[0061] If it is determined that the reference voltage VtH3 has not been detected ("NO" in step S103), the CPU 232 determines whether or not the reference voltage VtH1 has been detected (step S104). If it is determined that the reference voltage VtH1 has been detected ("YES" in step S104), the CPU 232 turns on the overvoltage notification LED 1921 to light it up. The CPU 232 also causes the selector 25 to select the input from the voltage divider circuit 24 (step S105). Then, the process of the CPU 232 proceeds to step S106.

[0062] If it is determined that the reference voltage VtH1 has not been detected ("NO" in step S104), the process of the CPU 232 proceeds to step S106.

[0063] When the process proceeds to step S106, the CPU 232 determines whether the count time is equal to or greater than the waiting time Tw and whether the waiting time Tw has elapsed since the detection of the reference voltage VtL2 (step S106). If it is determined that the waiting time Tw has not elapsed ("NO" in step S106), the process of the CPU 232 returns to step S103.

[0064] If it is determined that the standby time Tw has elapsed ("YES" in step S106), the CPU 232 determines whether or not the reference voltage VtL1 has been detected (step S107). If it is determined that the reference voltage VtL1 has not been detected ("NO" in step S107), the CPU 232 turns on the low power notification LED 1922 to light it up. The CPU 232 also causes the selector 25 to select normal input (step S141). The CPU 232 sets the power output from the constant voltage generating circuits 26, 27 to NG (not possible) (step S142). Then, the CPU 232 ends the startup control process. Note that in the process of step S141, the selection of the selector 25 may be omitted.

[0065] If it is determined in the determination process of step S107 that the reference voltage VtL1 is detected ("YES" in step S107), the CPU 232 determines whether or not the reference voltage VtH1 is detected (step S108). If it is determined that the reference voltage VtH1 is detected ("YES" in step S108), the CPU 232 determines whether or not the reference voltage VtH2 is detected (step S111). If it is determined that the reference voltage VtH2 is detected ("YES" in step S111), the CPU 232 sets the power output from the constant voltage generating circuits 26, 27 to NG (not possible) (step S112). Then, the CPU 232 ends the startup control process.

[0066] When it is determined that the reference voltage VtH2 is not detected ("NO" in step S111), the CPU 232 enables the constant voltage generating circuit 26 related to the image-related output to output power, and disables the constant voltage generating circuit 27 related to the non-image output to output power (step S121). The CPU 232 displays and outputs an overvoltage warning screen AH based on the power supply from the constant voltage generating circuit 26 (step S122).

[0067] The CPU 232 determines whether the reference voltage VtH1 has been detected (step S123). If it is determined that the reference voltage VtH1 has been detected ("YES" in step S123), the CPU 232 ends the startup control process. If it is determined that the reference voltage VtH1 has not been detected ("NO" in step S123), the process of the CPU 232 proceeds to step S141. That is, in this case, a voltage drop that cannot be ignored has occurred due to the output from the constant voltage generating circuit 26, and the supply power is both an overvoltage and a capacity shortage at the same time, so that the overvoltage notification LED 1921 and the low power notification LED 1922 are lit at the same time. The display of the overvoltage warning screen AH displayed in the process of step S122 is erased because the output of power from the constant voltage generating circuit 26 is disabled in the process of step S142.

[0068] When it is determined in the determination process of step S108 that the reference voltage VtH1 is not detected ("NO" in step S108), the CPU 232 causes the selector 25 to select the input of the normal input voltage. Also, the CPU 232 enables the power output of the constant voltage generating circuits 26 and 27 (step S109).

[0069] When the power supply to each unit starts, the CPU 232 determines whether or not the reference voltage VtL1 is detected (step S110). If it is determined that the reference voltage VtL1 is detected ("YES" in step S110), the CPU 232 ends the startup control process. In this case, the display operation continues to normal.

[0070] If it is determined that the reference voltage VtL1 is not detected ("NO" in step S110), the CPU 232 turns on the low power notification LED 1922 to light it (step S131). The CPU 232 determines whether or not the reference voltage VtL2 is detected (step S132). If it is determined that the reference voltage VtL2 is not detected ("NO" in step S132), the process of the CPU 232 proceeds to step S142.

[0071] If it is determined that the reference voltage VtL2 has been detected ("YES" in step S132), the CPU 232 switches the output of the constant voltage generating circuit 27 related to the non-image output, which was once enabled, to NG (not possible) (step S133). The CPU 232 determines whether or not the reference voltage VtL1 has been detected (step S134). If it is determined that the reference voltage VtL1 has not been detected ("NO" in step S134), the process of the CPU 232 proceeds to step S142.

[0072] When it is determined that the reference voltage VtL1 is detected ("YES" in step S134), the CPU 232 displays and outputs a low power warning screen AL (step S135). Then, the CPU 232 ends the startup control process. Of the above processes, steps S122 and S135 constitute the first notification step (first notification means of program 233) in the power abnormality notification method of the present invention, and steps S105, S131, and S141 constitute the second notification step (second notification means of program 233) in the power abnormality notification method of the present invention.

[0073] If the startup control process ends without normal startup, the user can turn off the power supply, replace the adapter 92 with an appropriate one, and then start the device again.

[0074] 12 is a flowchart showing the control procedure by the CPU 232 of the power monitoring control process executed after normal startup. This power monitoring control process may also be included in the power anomaly notification method of the present invention. The power monitoring control process is started in parallel with the display control operation after normal startup, and is executed continuously unless an anomaly is detected.

[0075] When the power monitoring control process is started, the CPU 232 determines whether or not the reference voltage VtH3 is detected (step S201). If it is determined that the reference voltage VtH3 is detected ("YES" in step S201), the CPU 232 operates the cutoff circuit 22 to cut off the input of power (step S251). This stops the input of power, the operation of the CPU 232 ends, and the power monitoring control process also ends.

[0076] If it is determined that the reference voltage VtH3 has not been detected (step S201: NO), the CPU 232 determines whether or not the reference voltage VtL1 has been detected (step S202). If it is determined that the reference voltage VtL1 has not been detected (step S202: NO), the CPU 232 turns on the low power notification LED 1922 to light it up (step S231).

[0077] The CPU 232 determines whether the reference voltage VtL2 is detected (step S232). If it is determined that the reference voltage VtL2 is not detected ("NO" in step S232), the CPU 232 switches the power output of the constant voltage generating circuits 26 and 27 to NG (not possible) (step S242). Then, the CPU 232 ends the power monitoring control process.

[0078] If it is determined that the reference voltage VtL2 has been detected ("YES" in step S232), the CPU 232 switches the power output of the constant voltage generation circuit 27 related to the non-image output to NG (not possible) (step S233). The CPU 232 determines whether or not the reference voltage VtL1 has been detected (step S234). If it is determined that the reference voltage VtL1 has been detected ("YES" in step S234), the CPU 232 displays and outputs a low power warning screen AL (step S235). Then, the CPU 232 ends the power monitoring control process. If it is determined that the reference voltage VtL1 has not been detected ("NO" in step S234), the process of the CPU 232 proceeds to step S242.

[0079] If it is determined in the determination process of step S202 that the reference voltage VtL1 has been detected ("YES" in step S202), the CPU 232 determines whether or not the reference voltage VtH1 has been detected (step S203). If it is determined that the reference voltage VtH1 has not been detected ("NO" in step S203), the process of the CPU 232 returns to step S201. In this case, it is determined that there is no abnormality in the input voltage.

[0080] When it is determined that the reference voltage VtH1 is detected ("YES" in step S203), the CPU 232 turns on the overvoltage notification LED 1921. The CPU 232 causes the selector 25 to select and set the input from the voltage dividing circuit 24 (step S204).

[0081] The CPU 232 determines whether the reference voltage VtH2 is detected (step S205). If it is determined that the reference voltage VtH2 is detected ("YES" in step S205), the CPU 232 switches the power output by the constant voltage generating circuits 26 and 27 to NG (not possible) (step S211). Then, the CPU 232 ends the power monitoring control process.

[0082] If it is determined that the reference voltage VtH2 has not been detected ("NO" in step S205), the CPU 232 switches the power output of the constant voltage generating circuit 27 related to the non-image output to NG (not possible) (step S221). The CPU 232 displays and outputs an overvoltage warning screen AH (step S222). The CPU 232 determines whether or not the reference voltage VtH1 has been detected (step S223). If it is determined that the reference voltage VtH1 has been detected ("YES" in step S223), the CPU 232 ends the power monitoring control process. If it is determined that the reference voltage VtH1 has not been detected ("NO" in step S223), the CPU 232 turns on the low power notification LED 1922 to light it up (step S241). Then, the process of the CPU 232 proceeds to step S242.

[0083] As described above, the image output device 1 of this embodiment includes the projection unit 16 that outputs an image, the LED operation unit 192 that performs a notification operation, an adjustment unit (voltage division circuit 24, selector 25, and constant voltage generation circuits 26, 27) that supplies power to each unit based on power input from the outside, and the CPU 232 of the voltage detection circuit 23. When the input power is not within the normal voltage range RN and is wider than the normal voltage range RN and is within a second reference range (normal voltage range RN, first high voltage portion RH1, and first low power portion RL1) related to the operation of the projection unit 16, the CPU 232 causes the adjustment unit to supply power to the projection unit 16 and causes the projection unit 16 to perform a first notification operation that displays that the input power is inappropriate. In this way, when the adapter 92 is not appropriate and there is an abnormality in the input power, the input is not immediately cut off or the operation of the projection unit 16 is not stopped, but the projection unit 16 displays the fact that the adapter 92 is inappropriate in text or the like to the extent possible, so that the user can easily know that the adapter 92 is inappropriate. Therefore, the user does not need to continue using the adapter without noticing the cause, or to waste time and effort in finding the cause by looking up a manual or the like. Therefore, this image output device 1 can notify the user of inappropriate power supply in a more understandable manner, and therefore the user can quickly replace the adapter 92 with an appropriate one to safely and reliably output images.

[0084] In addition, when the input power is outside a second reference range, the CPU 232 prohibits the projection unit 16 from outputting an image, and causes the LED operation unit 192 to perform a second notification operation indicating that the input power is inappropriate. In this way, when it is difficult for the projection unit 16 to project, the LED operation unit 192 performs the notification operation with low power consumption, thereby making it possible to avoid a state in which no notification can be made at all.

[0085] The adjustment unit also has a voltage divider circuit 24 that reduces the input voltage of the power input, and when the input voltage is higher than the reference voltage VtH1, which is the upper limit of the normal voltage range RN, and is equal to or lower than the reference voltage VtH2, which is the upper limit of the second reference range, the CPU 232 supplies the reduced voltage to the projection unit 16 via the voltage divider circuit 24. When the input voltage is slightly higher than the normal voltage range RN, the constant voltage generation circuit 26 operates normally by reducing the voltage before inputting it, thereby making it possible to supply appropriate power to the projection unit 16 and avoiding the induction of deterioration or failure of the projection unit 16, etc. This allows the user to quickly become aware of the incompatibility of the adapter 92, and also makes it possible to suppress unnecessary power consumption in the operation of the voltage divider circuit 24, etc.

[0086] Furthermore, the reference voltage VtH2, which is the upper limit voltage of the second reference range, is equal to or lower than the reference voltage VtH1 when the reference voltage VtH2 is lowered by the voltage dividing circuit 24. This allows the image output device 1 to normally notify of an abnormality through the projection unit 16. In particular, by setting the voltage obtained by lowering the reference voltage VtH2 to be equal to the reference voltage VtH1, it becomes possible for the projection unit 16 to notify of an abnormality over the widest possible voltage width, thereby improving user convenience.

[0087] The adjustment unit also has a constant voltage generation circuit 26 that supplies power to a portion including the projection unit 16, and a constant voltage generation circuit 27 that supplies power to the remaining portion. When both of the constant voltage generation circuits 26 and 27 are supplying power, if the input voltage of the input power becomes lower than a reference voltage VtL1 that is the lower limit of a normal voltage range RN, the CPU 232 stops the power supply by the constant voltage generation circuit 27, and if the input voltage becomes equal to or higher than the reference voltage VtL1 due to the stop, causes the projection unit 16 to perform a first notification operation. In this way, when a voltage drop occurs due to a current shortage from an incompatible adapter 92, it may be possible to increase the input voltage to enable operation of the projection unit 16 by stopping the operation of part of the image output device 1 to reduce the load. In such a case, the power supply from the constant voltage generation circuit 27 is cut off, and the constant voltage generation circuit 26 enables the operation of the projection unit 16, and a display is output indicating that the adapter 92 is incompatible, allowing the user to easily learn of the incompatibility of the adapter 92.

[0088] Furthermore, the projection unit 16 has light-emitting units 161 of multiple colors, and when the CPU 232 (CPU 111) stops the power supply by the constant voltage generation circuit 27 to perform the first notification operation, the first notification operation is performed by some of the light-emitting units 161 of multiple colors (for example, only red R). This reduces the load on the constant voltage generation circuit 26 side, so that the possibility of the projection unit 16 being able to perform the first notification operation increases, making it easier for the user to be aware of the incompatibility of the adapter 92.

[0089] Furthermore, when both of the constant voltage generating circuits 26 and 27 are supplying power, if the input voltage becomes lower than the reference voltage VtL2 that is lower than the reference voltage VtL1, the power supply by both of the constant voltage generating circuits 26 and 27 is stopped and the second notification operation is performed by the LED operation unit 192. When the input voltage drops significantly due to the load in this way, it is determined that the first notification operation by the projection unit 16 is difficult, and only the notification operation by the low power notification LED 1922 is performed. In other words, by not forcing the projection unit 16 to operate when operation is unstable due to insufficient capacity of the adapter 92, it is possible to prevent malfunctions in the projection unit 16 and each unit.

[0090] Furthermore, when the CPU 232 causes the projection unit 16 to perform the first notification operation, it also causes the LED operation unit 192 to perform the second notification operation. Since a notification operation with a small load such as an LED lamp can be operated more quickly than the projection unit 16, if a knowledgeable user is looking at the image output device 1, the user can be made to quickly recognize the incompatibility of the adapter 92 and the power supply can be cut off early. In particular, when the power capacity of the adapter 92 is insufficient, the input voltage may fall below the reference voltage VtL1 after the projection unit 16 is turned on. In such a case, by starting to notify the user of the abnormal state in advance, as much time as possible does not pass without being able to notify the user of the abnormality.

[0091] Moreover, the LED operation unit 192 that performs the notification operation has an overvoltage notification LED 1921 and a low power notification LED 1922, and performs the second notification operation by lighting these in a predetermined pattern. Since the LED lights up with a minimum current, it is possible to notify the user of an abnormality over a wide range of incompatibilities even if the projection unit 16 cannot be operated. Furthermore, in the notification operation using the LED, since the lighting color alone does not provide much information, the amount of information can be increased by defining a lighting pattern.

[0092] Moreover, the image is output by a projection unit 16 that emits projection light. A projection device (projector) having a projection unit 16 can be carried around and used in a variety of locations, such as conference rooms, classrooms, and lecture halls, and it is often the case that the user does not have a manual at hand when an abnormality occurs. As in this image output device 1, by clearly indicating the incompatibility of the adapter 92 by the projection unit 16 as much as possible, the user can be made aware of the incompatibility of the adapter 92 more reliably and quickly.

[0093] Furthermore, the power abnormality reporting method of this embodiment includes a first reporting step of causing the adjustment unit to supply power to the projection unit 16 and performing a first reporting operation of causing the projection unit 16 to display that the input power is inappropriate, when the input power is not within the normal voltage range RN and is wider than this normal voltage range RN and is within a second reference range related to the operation of the projection unit 16. In this way, by causing the projection unit 16 to clearly indicate the incompatibility of the adapter 92 as much as possible, this power abnormality reporting method can report an inappropriate power supply in a manner that is easier for the user to understand.

[0094] Moreover, the program 233 of this embodiment can cause the CPU 232 to execute the control operation related to the power anomaly notification method. Therefore, such a user-friendly notification operation can be easily executed by a general-purpose processor (CPU) without using a dedicated hardware configuration.

[0095] The present invention is not limited to the above-described embodiment, but may be modified in various ways. For example, in the above embodiment, the first notification operation is possible in both the first high-voltage portion RH1 and the first low-power portion RL1, but this is not limited to the above. For example, the image output device 1 may not have the voltage divider circuit 24 and may not have the first high-voltage portion RH1.

[0096] In the above embodiment, the supply voltage is reduced via the voltage divider circuit 24 when a voltage higher than the reference voltage VtH1 is input. However, the constant voltage generating circuit 26 may be capable of directly reducing the voltage.

[0097] In the above embodiment, the reference voltage VtH1 becomes equal to the reference voltage VtL1 when it is lowered by the voltage-dividing circuit 24, and the reference voltage VtH2 becomes equal to the reference voltage VtH1 when it is lowered by the voltage-dividing circuit 24. However, this is not limited to the above. It is sufficient that the voltage of the first high-voltage portion RH1 is lowered to fall within the normal voltage range RN.

[0098] In the above embodiment, the power supply unit 20 has been described as having two constant voltage generating circuits 26 and 27, but it may have a single constant voltage generating circuit, or may have three or more constant voltage generating circuits. The reduction of the operating load of the image output device 1 does not have to be achieved by switching between the presence and absence of power supply from the constant voltage generating circuit 27. The presence and absence of operation of each load (configuration) may be switched individually.

[0099] In the above embodiment, the light-emitting unit 161 has been described as having an LED that emits red light and an LD that emits blue light, but this is not limited to this. It may also emit each of the three colors RGB. It may also be capable of outputting white light. Even when the first notification operation is performed due to insufficient power capacity, it is not necessary to reduce the number of colors to be emitted. Conversely, even when the first notification operation is performed due to overvoltage, only some of the colors may be emitted.

[0100] In addition, even if the input voltage does not reach the reference voltage VtL1 due to insufficient capacity or insufficient output voltage of the adapter 92, in cases where display is possible by reducing the light emission intensity (brightness), the projection unit 16 may be operated to perform the first notification operation.

[0101] In the above embodiment, the second notification operation by the LED operation unit 192 is performed regardless of the presence or absence of the first notification operation by the projection unit 16. However, these operations may be mutually exclusive.

[0102] In the above embodiment, the LED operation unit 192 has the separate overvoltage notification LED 1921 and low power notification LED 1922. However, a common LED may perform notification operations with different light emission patterns. Also, instead of a single LED, a combination of lighting operations of multiple LEDs may be used.

[0103] The second notification operation is not limited to being performed by an LED, but may be performed by any device that operates with low power consumption, such as a small liquid crystal display screen, such as a segment type liquid crystal display screen, capable of displaying numbers indicating the type of abnormality.

[0104] In the above embodiment, the image output device 1 has been described as a projection device (projector) equipped with the projection unit 16, but is not limited to this. It may be a display device having a display screen, etc., as long as it is a device that receives image data and power from an external source and displays an image.

[0105] In the above embodiment, the power is supplied from the adapter 92, but the same processing as that described in the above embodiment can be performed as long as the power is input from a configuration capable of supplying appropriate DC power. Also, the adapter 92 does not need to be supplied with power from the commercial power source 91.

[0106] In the above description, non-volatile memories such as flash memory and HDD are used as examples of computer-readable media for storing the program 233 related to the abnormality monitoring control of the power supply of the present invention, but the present invention is not limited to these. As other computer-readable media, other non-volatile memories such as MRAM and portable recording media such as CD-ROM and DVD disks can be applied. Furthermore, a carrier wave is also applied to the present invention as a medium for providing data of the program according to the present invention via a communication line. In addition, the specific configurations, contents and procedures of the processing operations, etc. shown in the above embodiments can be modified as appropriate without departing from the spirit of the present invention.

[0107] Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents. The inventions described in the claims originally attached to this application are set forth below. The claim numbers in the appended claims are the same as those in the claims originally attached to this application.

[0108] [Note] <Claim 1> an image output unit that outputs an image; an adjustment unit that supplies power to each unit based on power input from an external source; A control unit; Equipped with The control unit is When the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to the operation of the image output unit, the adjustment unit is made to supply power to the image output unit and a first notification operation is made to cause the image output unit to display that the input power is inappropriate. Image output device. <Claim 2> A notification unit that performs a notification operation is provided, The image output device of claim 1, wherein, when the input power is outside the second standard range, the control unit prohibits the image output unit from outputting an image, and causes the alarm operation unit to perform a second alarm operation indicating that the input power is inappropriate. <Claim 3> the adjusting unit has a transformer unit that reduces an input voltage of the input power, When the input voltage is higher than a first upper limit voltage of the first reference range and is within the second reference range, the control unit supplies a voltage reduced via the transformer unit to the image output unit. 3. The image output device according to claim 1 or 2. <Claim 4> 4. The image output device according to claim 3, wherein the second upper limit voltage of the second reference range is equal to or lower than the first upper limit voltage when the second upper limit voltage is lowered by the transformer section. <Claim 5> the adjustment unit has a first supply unit that supplies power to a portion including the image output unit, and a second supply unit that supplies power to the remaining portion; The control unit is when an input voltage of the input power becomes lower than a first lower limit voltage of the first reference range in a case where both the first supply unit and the second supply unit perform the power supply, the power supply by the second supply unit is stopped; When the input voltage becomes equal to or higher than the first lower limit voltage due to the stop, the first notification action is performed. 5. The image output device according to claim 1. <Claim 6> the image output unit has light emitting units of a plurality of colors, When the control unit stops the power supply by the second supply unit and causes the first notification operation to be performed, the control unit causes some of the light-emitting units of the plurality of colors to perform the first notification operation. 6. The image output device according to claim 5. <Claim 7> A notification unit that performs a notification operation is provided, The control unit is when the input power is outside the second reference range, prohibiting the image output unit from outputting an image and causing the notification operation unit to perform a second notification operation indicating that the input power is inappropriate; When the input voltage becomes lower than a second lower limit voltage that is lower than the first lower limit voltage in a case where both the first supply unit and the second supply unit perform the power supply, the power supply by both the first supply unit and the second supply unit is stopped, and the second notification operation is performed. 7. The image output device according to claim 5 or 6. <Claim 8> A notification unit that performs a notification operation is provided, The image output device according to any one of claims 1 to 7, wherein the control unit, when performing the first warning operation, also causes the warning operation unit to perform a second warning operation, which indicates that the input power is inappropriate. <Claim 9> The notification operation unit has an LED lamp and performs the second notification operation by lighting the LED lamp in a predetermined pattern. 9. An image output device according to claim 2, 7 or 8. <Claim 10> 10. The image output device according to claim 1, wherein the image output section is a projection section that emits projection light. <Claim 11> 1. A power abnormality notification method for notifying an abnormality in power input to an image output device including an image output unit that outputs an image and an adjustment unit that supplies power to each unit based on power input from an external source, comprising: a first notification step of causing the adjustment unit to supply power to the image output unit and performing a first notification operation of causing the image output unit to display that the input power is inappropriate, when the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to whether the image output unit is operable or not; A power abnormality reporting method comprising: <Claim 12> An image output device comprising: an image output unit for outputting an image; and an adjustment unit for supplying power to each unit based on power input from an external source; a first notification means for causing the adjustment unit to supply power to the image output unit and perform a first notification operation for causing the image output unit to display that the input power is inappropriate, when the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to the operation of the image output unit. A program that functions as a [Explanation of symbols]

[0109] 1 Image output device 111 CPU 112 Media Processor 113 HDMI control circuit 12 Storage section 121 Display Control Program 122 Display settings 13 RAM 14 Input section 141 HDMI terminal 142 Communication input terminal 143 Communication Control Unit 15 Operation reception section 15a Operation Panel 16 Projection section 16a Output port 161 Light emitting part 162 Optical system 163 Rotation drive unit 164 Rotational Motor 17 Display driver 18 Cooling section 181 Blower drive unit 182 Blower motor 19 Output section 191 Audio output section 192 LED operation part 1921 Overvoltage warning LED 1922 Low power notification LED 20 Power supply section 21 Protection circuit 22 Breaking Circuit 23 Voltage detection circuit 231 Monitoring circuit 232 CPU 233 Programs 24 Voltage divider circuit 25 Selector 26, 27 Constant voltage generation circuit 81, 82 Cable 92 Adapter AH Overvoltage warning screen AL low power warning screen TR recovery time Tw Waiting time VtH1~VtH3, VtL1, VtL2 Reference voltage

Claims

1. an image output unit that outputs an image; an adjustment unit that supplies power to each unit based on power input from an external source; A control unit; Equipped with The control unit is When the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to the operation of the image output unit, the adjustment unit is made to supply power to the image output unit and a first notification operation is made to cause the image output unit to display that the input power is inappropriate. Image output device.

2. A notification unit that performs a notification operation is provided, The image output device of claim 1, wherein the control unit, when the input power is outside the second standard range, prohibits the image output unit from outputting an image and causes the alarm operation unit to perform a second alarm operation indicating that the input power is inappropriate.

3. the adjusting unit has a transformer unit that reduces an input voltage of the input power, When the input voltage is higher than a first upper limit voltage of the first reference range and is within the second reference range, the control unit supplies a voltage lowered via the transformer unit that is equal to or higher than the first lower limit voltage and equal to or lower than the first upper limit voltage of the first reference range to the image output unit.

3. The image output device according to claim 1.

4. 4. The image output device according to claim 3, wherein the second upper limit voltage of the second reference range is a voltage that is lower than the first upper limit voltage and higher than the first lower limit voltage when the second upper limit voltage is lowered by the transformer unit.

5. the adjustment unit includes a first supply unit that supplies power to the image output unit, and a second supply unit that supplies power to at least one of the audio output unit and an input unit that receives data input from an external device; The control unit is when an input voltage of the input power becomes lower than a first lower limit voltage of the first reference range in a case where both the first supply unit and the second supply unit perform the power supply, the power supply by the second supply unit is stopped; When the input voltage becomes equal to or higher than the first lower limit voltage due to the stop, the first notification action is performed.

5. The image output device according to claim 1.

6. the image output unit has light emitting units of a plurality of colors, When the control unit stops the power supply by the second supply unit and causes the first notification operation to be performed, the control unit causes some of the light-emitting units of the plurality of colors to perform the first notification operation.

6. The image output device according to claim 5.

7. A notification unit that performs a notification operation is provided, The control unit is when the input power is outside the second reference range, prohibiting the image output unit from outputting an image and causing the notification operation unit to perform a second notification operation indicating that the input power is inappropriate; When the input voltage becomes lower than a second lower limit voltage that is lower than the first lower limit voltage in a case where both the first supply unit and the second supply unit are supplying the power, the power supply by both the first supply unit and the second supply unit is stopped, and the second notification operation is performed.

7. The image output device according to claim 5.

8. A notification unit that performs a notification operation is provided, The image output device according to any one of claims 1 to 7, wherein the control unit, when performing the first warning operation, also causes the warning operation unit to perform a second warning operation indicating that the input power is inappropriate.

9. The notification operation unit has an LED lamp and performs the second notification operation by lighting the LED lamp in a predetermined pattern.

9. The image output device according to claim 2, 7 or 8.

10. 10. The image output device according to claim 1, wherein the image output section is a projection section that emits projection light.

11. 1. A power abnormality notification method for notifying an abnormality in power input to an image output device including an image output unit that outputs an image and an adjustment unit that supplies power to each unit based on power input from an external source, comprising: a first notification step of causing the adjustment unit to supply power to the image output unit and performing a first notification operation of causing the image output unit to display that the input power is inappropriate, when the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to the operation of the image output unit; A power abnormality reporting method comprising:

12. An image output device comprising: an image output unit for outputting an image; and an adjustment unit for supplying power to each unit based on power input from an external source; a first notification means for causing the adjustment unit to supply power to the image output unit and perform a first notification operation for causing the image output unit to display that the input power is inappropriate, when the input power is not within a first reference range indicating a normal range and is wider than the first reference range and within a second reference range relating to the operation of the image output unit. A program that functions as a

Images