JP2950255B2 - Projector and control method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a projector and a control method thereof.

[0002]

2. Description of the Related Art FIG. 37 is a block diagram showing a configuration of an example of a liquid crystal projector proposed by the present applicant.
0 is a power supply on / off switch, and 501 is a power supply unit, which supplies power to the drive control circuit unit 505. Reference numeral 504 denotes a bimetal thermostat, which is connected between the power supply unit 501 and the projection light source lamp 503. The inside of the liquid crystal video projector is sufficiently cooled by the cooling fan 502, but reaches a certain temperature, for example, the vent is closed. In this case, the power to the projection light source lamp 503 is turned off by the bimetal thermostat 504. A signal input terminal 506 is connected to the drive control circuit unit 505, and a liquid crystal light valve 507 is modulated and driven by the drive control circuit unit 505. By moving the projection lens 508 forward and backward, the projection light modulated by the liquid crystal light valve 507 forms an image on a screen.

An example of such a liquid crystal ejector is disclosed in, for example, Japanese Patent Application No. 63-133873.

[0004]

However, in such a conventional liquid crystal projector, switching of a signal input source and adjustment of image quality are performed by manually operating a mechanical switch or a mechanical volume, and the lens is focused. Is also manually operated, but considering the normal usage of the liquid crystal projector, there is a large distance between the liquid crystal projector main body, the screen, and the user (viewer), which makes the operation inconvenient. There is a problem of lingering.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a projector with improved operability and a control method therefor.

[0006]

A projector according to the present invention is a projector which can be controlled by a remote controller.
A receiver is provided for receiving a signal from the remote controller, and a unit that sets the autofocus operation to a standby state when reception is performed by the receiver during the autofocus operation of the lens.

Further, a projector control method according to the present invention includes a receiving unit for receiving a signal from a remote controller, and a unit for performing autofocus of a lens, wherein the projector can be controlled by the remote controller. And a step of setting the autofocus operation to a standby state when reception is performed by the receiving unit during the autofocus operation.

[0008]

[0009]

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a functional block diagram showing a basic configuration of the present invention.

In FIG. 1, there are an input device 120 and an input means 1 for inputting an operation state of a liquid crystal video projector (hereinafter referred to as LVP), and a command 2 for judging the operation state of the LVP based on an output from the input means 1. The power control unit 3, the input switching unit 4, the video processing unit 5, the audio processing unit 6, and the lens control unit 7 operate based on the determined command.

Reference numeral 210 denotes a non-lighting detector which detects the non-lighting of the projection light source.
And outputs, to the power supply control means 3, information on the lighting / non-lighting of the projection light source after a preset time has elapsed. If the non-lighting of the projection light source is detected by the non-lighting detection means 10 when the power is turned on, the power is turned on again at a preset time interval up to a preset number of times. If the non-lighting of the projection light source is also detected by the non-lighting detection means 10 by this operation, the failure of the projection light source is determined, the information is stored in the storage device 250, and displayed on the display device 130 through the display means 9.
Reference numeral 211 denotes a temperature detector for detecting the temperature inside the LVP, and temperature information is output from the temperature detection means 20 to the power supply control means 3 at predetermined time intervals according to a signal from the temperature detector 211. A control signal is output from the fan motor control means 8 to the fan motor control device 240 based on the temperature information from the temperature detection means 20. Reference numeral 4 denotes input switching means for switching an input source connected to the input switching device 230. Reference numeral 5 denotes an image processing unit which controls an increase or decrease in image quality, for example, hue, color density, contrast, sharpness, brightness, etc., based on the output from the instruction determination unit 2 and outputs image quality information to the D / A converter 270. I do. The image quality information controlled by the video processing means 5 is stored in the storage device 250 and is reproduced when the power is turned on. Reference numeral 6 denotes an audio processing unit that controls an increase or decrease in volume or the like based on an output from the instruction determination unit 2 and outputs audio information to the D / A converter 270. The sound information controlled by the sound processing means 6 is stored in the storage device 250 and is reproduced when the power is turned on. Reference numeral 7 denotes a lens control unit which outputs a signal for lens control, for example, autofocus, electric focus, electric zoom, electric tilt, etc., to the lens control unit 260 based on the output from the command discriminating unit 2; The operation state of each unit is displayed by the display unit 9 based on the output from each unit of the input switching unit 4, the video processing unit 5, the audio processing unit 6, and the lens control unit 7. Display means 9
The display device 130 performs a display operation in accordance with an output signal from the display device 130.

When an abnormal operation is detected by the power supply control means 3, the alarm device 140 is driven by the alarm generation means 30 to generate an alarm.

Reference numeral 50 denotes timer means for performing time control in each means.

Reference numeral 221 denotes a light source power supply control unit;
Is a main power control device, each of which is controlled by an output from the power control means 3.

The above-mentioned input means 1, command discriminating means 2, power control means 3, input switching means 4, video processing means 5, audio processing means 6, lens control means 7, non-lighting detecting means 10,
The temperature detection means 20, the fan motor control means 8, the display control means 9, and the alarm generation means 30 constitute a control unit 100, and this control unit 100 can be constituted using a microcomputer.

FIGS. 2 to 7 are block diagrams showing an embodiment in which the present invention is constituted by using a microcomputer.

The microcomputer system constituting the control unit 100 includes a CPU 100a, a ROM 100b,
It comprises an AM 100c, an I / O port 100d, and a timer mechanism 100e.

In FIG. 3, instruction switches S1 to S18 and D1 to D8 are connected to the I / O port 100d to I0 to I6 and O0 to O3. Power switch S1, mute switch S2, mode switch S3, volume down switch S4, volume up switch S5, pattern switch S6, electric focus fur switch S7, electric focus near switch S8, minus switch S9, plus switch S10, standard switch S11, Picture switch S1
2. Electric zoom wide switch S13, electric zoom tele switch S14, auto focus switch S15, electric swing up switch S16, electric swing down switch S17, auto swing switch S18, on-screen switch D1, focus super switch D2, focus priority switch D3, focus AF switch D4, option A switch D7, option B
A switch D8, which constitutes a circuit related to the input ports I0 to I6 and the output ports O0 to O3 of the I / O port 100d, and has an L level from any one of the output ports O0 to O3. By taking in the signals output by the scanning in the input ports I0 to I6, it is possible to confirm which switch has been pressed. Note that the fetch process is an interrupt process. An infrared remote control light receiver (hereinafter, referred to as a remote control light receiver) 200 is connected to the input port I7, and a command signal from the remote control is input. The command switches S1 to S18 and D1 to D8 and the remote control light receiver 200 constitute the input device 120.

In FIG. 4, when an H level is output from the output port O4, the transistor T1 constituting the light source power supply control device 221 is turned on, the relay RL1 is turned on, and the light source power supply 301 is turned on.

When the H level is output from the output port O5, the transistor T2
Is turned on, the relay RL2 is energized, and the main power supply 300 is energized.

The input port I9 receives signals from a temperature sensor TS1 constituting the temperature detector 211 and an A / D converter AD1 for converting an output signal of the temperature sensor TS1 into a digital value. In FIG. 6, a display device 13 is connected to the output port O6.
0, the temperature warning lamp LD1 and the transistor T3 are connected, and when an H level is output from the output port O6, the transistor T3 is turned on and the temperature warning lamp L
D1 lights up. The output port O7 has a display device 130
Light source life lamp LD2 and transistor T
4 is connected and the H level is output from the output port O7, the transistor T4 is turned on and the light source life lamp LD2
Lights up. The output port O8 and the output port O9 are provided with a light source operation lamp LD3 constituting the display device 130.
r, the light source operation lamp LD3g transistor T5 and transistor T6 are connected. Light source operation lamp LD3
r and the light source operation lamp LD3g emit red and green light, respectively, and two elements are integrated. When the L level is output from the output port O8, the transistor T5 is turned on and the light source operation lamp LD3r is turned on. Output port O
When the L level is output from 9, the transistor T6 is turned on, and the light source operation lamp LD3g is turned on. When the L level is output from the output port O8 and the output port O9 at the same time, the light source operation lamp LD3r and the light source operation lamp LD3g are simultaneously turned on, so that the emission color is orange.

Output port O10 and output port O11
Includes a power indicator lamp LD4 constituting the display device 130.
r, the power indicator lamp LD4g, the transistor T7 and the transistor T8 are connected. Power indicator lamp LD4
r and the power indicator lamp LD4g are equivalent to the light source operation lamp LD3r and the light source operation lamp LD3g, respectively. The operations of the output ports O8 and O9 are the same as those of the output ports O10 and O11. It is the same as the one replaced.

In FIG. 7, the output port O12 and the output port O13 have transistors T9, T10 and T
11, the zener diode ZD1 and the three-terminal regulator SR1 are connected. The output port O12 outputs a signal for controlling the operation stop of the fan motor 245. When an H level is output from the output port O12, the transistor T
9 and the transistor T10 are turned on, and the fan motor 245 is energized. The output port O13 outputs a signal for controlling the rotation speed of the fan motor 245.

When the output port O12 outputs the H level and the output port O13 outputs the L level, the transistor T11 is turned off, and the output voltage of the three-terminal regulator SR1 becomes the Zener voltage of the Zener diode ZD1. Since a higher voltage is output by the amount, the fan motor 245 rotates at a high speed, and the air volume of the fan increases. When the output port O13 outputs the H level, the transistor T11 is turned on, so that the cathode of the Zener diode ZD1 becomes the ground potential and the Zener voltage becomes 0V.
Since the output voltage of the three-terminal regulator SRl becomes the original output voltage, the fan motor 245 rotates at low speed and the air volume of the fan decreases, but the noise of the fan decreases.

In FIG. 5, an input / output port 1 / Ol is connected to an electrically erasable writable ROM (hereinafter referred to as E ² P
ROM 250) is connected. The storage device 250 needs to hold the memory even when the power is not supplied.

A D / A converter 270 is connected to the output port O14.

In FIG. 6, an on-screen display device (hereinafter, referred to as OSD) 280 constituting the display device 130 is connected to the output port O15, and the information of the control unit 100 is projected on the projection screen by the OSD 280.

In FIG. 4, a non-lighting detector 210 for detecting non-lighting of the projection light source is connected to the input port I8.
The resistor R1 is a detection resistor for detecting the light source current, and detects the light source current based on the voltage across the resistor.

OP1 is a voltage amplifier, and the amplified signal is converted into a digital value by an A / D converter AD2 and input to an input port I8.

In FIG. 5, control signals of the lens control device 260 are output to output ports O16 to O22. The input ports I11 to 114 receive sensor signals of the lens control device 260. An output port O16 is an AFC signal for auto focus on, an output port O17 is an electric focus far side drive signal PFF signal, an output port O18 is an electric focus near side drive signal PFN signal, an output port O19 is an electric zoom wide side drive signal PZW signal, Output port O
Reference numeral 19 outputs an electric zoom tele side drive signal PZT signal. The output port O21 and the output port O22 output an electric swing-up signal PSU signal and an electric swing-down signal PSD signal. When the output port O21 is at the H level, the screen moves up, and when the output port O21 is at the H level, the screen moves down. The input port I11 receives a focus near side drive signal MN signal from the lens control device 260,
A focus far side drive signal MF signal from the lens control device 260 is input to the input port I12, and a lens center position signal SC signal of the lens control device 260 is input to the input port 113.

The output port O23 outputs to the input switching device 230 a signal for switching the input source from an external input terminal or an internal option input terminal. The output port O24 outputs a signal for switching the video 1 input or the video 2 input to the input switching device 230 when the input source is selected. The output port O25 outputs a blue back on / off signal to the input switching device 230.

In FIG. 3, a signal for resetting the light source out flag stored in the storage device 250 when the light source is replaced is input to the input port I16.

In FIG. 7, the output port O26 outputs a signal to the alarm device 140 by an alarm output.

The control program and data used in the program are written in the ROM 100b.

The RAM 100c is used as a work area when a control program is executed and various flag areas including data of the E ² PROM 250.

The timer mechanism 100e functions as a timer in the control program.

In FIG. 5, the storage device 250 stores the operation state of the liquid crystal video projector, such as the set value of the D / A converter 270, in addition to the light source cutoff flag.

Next, the control program in this case is shown in FIGS.
This will be described with reference to the flowchart of FIG. 33 and FIGS. In the description of the flowcharts shown in FIGS. 8 to 33, P1, P2,... Indicate processing procedure (step) numbers.

FIG. 8 is a flowchart showing the outline of the processing procedure of this embodiment, and shows the main processing.

When started, first, at P1, each of the I / O ports 100d is set to a standby state. Then P2
In the constant area of the RAM 100c, the E ² PROM2
50 data are read. This data consists of a set value of the D / A converter 270, information on light source cutoff, and the like.
It will be used in the subsequent processing procedure. Next, at P3, the states of the instruction switches D1 to D8 are read into the constant area of the RAM 100c (P10 to P25). Command switch D1
The subsequent operation is determined by the level states of D8. For example, if the command switch D1 is at the H level, OSD280
Is displayed in Japanese, and at L level in English. With the above processing procedure, the basic operation state of the control unit 100 is developed as a flag in the RAM 100c. Next, at P4, the power supply display lamp LD4r indicating that the control unit 100 is in the standby state is turned on. P5
Waits until a power command is input from the command switch or the remote control light receiving unit 200. When the power supply command is detected at P5, the power supply control process of P6 is started. When the power is normally turned on, the command is determined by each process of P8 based on the input of the command of P7, and each process is started.

Next, power supply control will be described. In FIGS. 11 and 12, it is determined whether the power is on or off at P30 when the power command is issued. If the power is off, the process proceeds to power off control. When the power is on, the light source outage flag on the RAM 100c is checked in P32, and if the flag is on, the control is transferred to the light outage control in P33. If the flag is off, the power indicator lamp LD4g is turned on at P34, and the power indicator lamp indicating the operating state emits green light. At P35, the main power supply 300 is turned on, and the components other than the light source start operating. The light source operation lamp LD3g indicating that the light source is warming up starts blinking green (P36). The fan motor 245 starts rotating at a low speed (P37). At P38, the light source power control device 221 is turned on, and the lighting operation of the projection light source starts. Thereafter, after a lapse of time at the timer t1 (P39), the output of the non-lighting detector 210 is checked at P40, and if the non-lighting of the projection light source is detected, the control is transferred to the relighting control (P41). When the projection light source is turned on, a countdown display is performed on the OSD 280 for 60 seconds, and the process waits until the projection light source emits a prescribed light amount (P42). During this time, D
The contents of the RAM 100c, such as video information, ie, color tone, color density, and audio information, ie, volume, are output to the / A converter 270 (P43). When the process of P43 is completed, if the command switches D3 and D4 are at the H level in P44, the autofocus process of P45 is performed from the mode in which the autofocus is performed when the power is turned on (P20). Next, the current input source is displayed in P46, and the light source operation lamp LD3g indicating that the projection light source is normally lit is lit in green in P47. After that, P5
In the interrupt processing of No. 5, when it is detected in P48 that the internal temperature of the LVP has become equal to or more than θ1 by the output of the temperature detector 211, the control at the time of high temperature in P49 and the non-lighting detector 21 are performed.
If the projection light source is detected to be extinguished at P50 based on the output of 0, the light source cutoff control is performed at P51, and if there is no video signal input for a fixed time (tl) while the LVP is operating, P31.
The control shifts to the power-off processing of. In addition, the command is discriminated in P54 in response to the command input in P53, and the control shifts to each process.

FIG. 13 is a flowchart showing the power-off control. Power switch S1 or remote control receiver 2
When a power off command is input from 00, RAM is set at P60
The contents of the flag in 100c are written into the E ² PROM 250, and the light source power supply 301 is set in P61, and the main power supply 300 is set in P62.
Turns off. The fan motor 245 rotates at high speed (P63), and the air volume increases. Power indicator lamp LD4r
Is turned on, and becomes red light indicating the standby state (P64). The light source operation lamp LD3 blinks orange to indicate that the light source is cooling down (P65). If it is detected in P66 that the internal temperature of the LVP has become less than θ0 by the output of the temperature detector 211, the fan motor 245 stops (P67).
The light source operation lamp LO3 is turned off (P68), and enters a waiting state.

FIG. 14 is a flowchart showing light source out control. When the extinction of the projection light source is detected by the output of the non-lighting detector 210, an alarm is output from the output port O26 in P70, and the light source power supply 301 is switched to P72 in P71.
The main power supply 300 is turned off, and the power indicator lamp LD
4 turns on in red (indicates a standby state) (P73), and the light source operation lamp LD3 turns on in red (indicates that the operation of the light source is stopped).
(P74), the light source life lamp LD2 lights up (P74).
75) indicates that the light source has become defective. After this RAM
The light source out flag in 100c is set (P76), and R
The contents of flags in the AM 100c are stored in the E ² PROM 250
(P77), and after the time-up of the timer t2 at P78, the rotation of the fan motor 245 is stopped at P79,
At P80, the alarm being output from the output port O26 is stopped. The reset of the light source cutoff flag is performed by turning on the switch RS1 and inputting the L level to the input port 116.

FIG. 15 is a flowchart showing the relighting control. When the non-lighting of the projection light source is detected by the output of the non-lighting detector 210 when the power is turned on, a certain number of times (CO
The re-lighting operation is repeated, and if the light cannot be turned on within a certain number of times, the light source is turned off and the processing is performed. Clear the counter in P90, turn off the light source power supply 301 in P91,
Light source operation lamp LD3 flashes red, light source life lamp LD
2 also blinks to indicate that relighting control is being performed. P9
In step 4, wait until the timer t3 times out, and perform the lighting operation (P95 to P96). If the lighting is confirmed in P97, the light source operation lamp LD3 is caused to blink green (P101), and the light source life lamp LD2 is turned on. Turns off (P10
2) Return control to normal operation. When the non-lighting is detected in P97, the light source power supply 301 is turned off (P98), the counter is increased by one (P99), and the relighting operation is repeated up to CO times (P94 to P100). If the lighting is not performed after the re-lighting operation is performed up to CO times in P100, the processing shifts to light source cutoff control, and a message indicating that the life of the light source has expired is displayed.

FIG. 16 is a flowchart showing the high temperature control. If the LVP internal temperature becomes equal to or higher than θ1 in the output of the temperature detector 211 during the normal operation, P110
To flash the temperature warning lamp LD1 to indicate that the temperature has become high. In P111, the fan motor 245 is rotated at high speed. This state continues until the LVP internal temperature becomes less than θ1 at P112. When the LVP internal temperature becomes less than θ1, the temperature warning lamp LD1 is turned off, the fan motor 245 is rotated at a low speed, and the control is returned to the normal operation (P
122-P123). However, if the internal temperature of the LVP continues to rise and exceeds θ2, the contents of the flag in the RAM 100c are written into the E ² PROM 250 (P114), all the power supplies are turned off (P115-P116), and the power supply display lamp LD
4 indicates red lighting (standby state), the light source operation lamp LD3 indicates red blinking (abnormal state) (P117 to P118),
In P119, cooling is performed until the LVP internal temperature becomes less than θ0, the rotation of the fan motor 245 is stopped in P120, the temperature warning lamp LD1 and the light source operation lamp LD3 are turned off (P121), and the apparatus enters a standby state.

FIG. 17 is a flowchart showing an input source display on the OSD when the power is turned on. OS at P130
D displays all input sources on the screen.

In this embodiment, the video 1, the video 2, and the option are displayed. The options are options 1 to 3 depending on the state of the option switches D7 and D8.
(P22 to P25) are displayed. However, if there is no option, no option is displayed. Then timer t
After the time-up of 5 (P131), the selected input source is displayed (P132), and after the time-up of the timer t6 (P133), the display on the OSD is deleted (P13).
4).

FIG. 18 is a flowchart of control for switching the input mode when there is a mode switching command input from the mode switch S3 or the remote control light receiving unit 200. When an instruction is input, the next input source after the currently selected input source is set in the flag of the RAM 100C (P14).
0), OSD in P141, RAM1 in P140
The input source name set in 00c is displayed. Subsequently, a selection signal of the selected input source is output from the output ports O23 and 024 to the input switching device 230 (P14).
2). After the timer t7 expires (P143), O
The display in SD is deleted (P144). The input sources are in the order shown in FIG. 35 (video 1 → video 2 → option →
...), Every time a mode selection command is input.

FIG. 19 is a flowchart showing the auto focus process. Auto focus switch S1
5 or when an autofocus command is input from the remote control light receiving unit 200, a display during the autofocus operation is performed by the OSD (P150). Next, the AFC signal is turned on in P151. In P152, both MN signal and MF signal are H
When the level is reached, the focus is in focus (P1
52) In P153, the OSD display is changed to the autofocus in-focus display, the AFC signal is turned off (P154), and after the timer t8 times out (P155), the OSD display is erased (P156). AFC signal turns on at P151,
If there is an input from the remote control light receiver 200 during the operation of the auto focus (P161), the AFC signal is turned off (P162), and the control waits until there is no input of the remote control signal (P163), and the AFC signal is turned on again (P164).
Continue autofocus operation. P161 to P1
64 is processed in the interrupt processing (P160). Also, when the command switches D3 and D4 are at the H level and the L level respectively (P18, P21) and the auto focus operation is always performed, the interrupt processing of P160 is performed, and the auto focus operation of the lens by the remote control signal light is performed. The effect of is reduced.

FIG. 20 shows that when a pattern command is input from the pattern switch S6 or the remote control light receiving unit 200, the pattern serving as a guide for focusing is set to the OSD.
To display / delete on the screen. When the current pattern is not displayed at P170, if the command switch D2 is at the L level (P15) at P171, the blue-back signal is turned on from the output port O25 (P172), and O is output at P173.
The pattern is displayed by SD. If the pattern is currently displayed in P170, the blue back-off process is performed in P174 and P175, and the pattern display in 0SD is deleted in P176.

FIG. 21 shows an electric focus fur (far).
It is a flowchart which shows a side process. Command switch S7
Alternatively, when an electric focus fur command is input from the remote control light receiving unit 200, the PFF signal (output port O17) is turned on while the command is being input (P
180-P182). This allows the lens to focus at the far point.

FIG. 22 is a flowchart showing the near (near) side processing of the electric focus. The PFN signal (output port O1) is input while the electric focus near command is input from the command switch S8 or the remote control light receiving unit 200.
8) is turned on (P185 to P187). Thereby, the focus of the lens is adjusted at the near point.

FIG. 23 is a flowchart showing the wide (wide) side processing of the electric zoom. While the electric zoom wide command is input from the command switch S13 or the remote control light receiving unit 200, the PZW signal (output port O1
9) is turned on (P190 to P192). This enlarges the size of the projection screen.

FIG. 24 is a flowchart showing the tele (far) side processing of the electric zoom. While the electric zoom tele command is input from the command switch S14 or the remote control light receiving unit 200, the PWT signal (output port O20)
Is turned on (P195 to 197). Thereby, the size of the projection screen is reduced.

FIG. 25 is a flowchart showing the processing on the up side of the electric swing, and the projection screen is raised upward by this processing. The PSU signal (output port O21) is turned on while the electric swing-up command is input from the command switch S16 or the remote control light receiving unit 200 (P200 to P202).

FIG. 26 is a flowchart showing the down-side processing of the electric swing. This processing raises the projection screen downward. While the electric swing down command is being input from the command switch S17 or the remote control light receiving unit 200, the PSD signal (output port O22) is turned on (P205 to P207).

FIG. 27 is a flowchart showing the processing of the automatic swing. This is a function to automatically return the screen to which the above-mentioned electric swing-up command or down command is tilted to a state where there is no tilt. When an auto swing command is input from the command switch S18 or the remote control light receiving unit 200, the level of the lens center position signal SC (input port I13) is determined at P210. Therefore, the above-mentioned PSD signal is turned on until SC becomes the L level (P211 to P2).
213). If the SC is at the L level, the camera is in a downward tilted state.
The SU signal is turned on (P214 to P21).

FIG. 28 is a flowchart showing a picture processing for selecting an adjustment item at the time of image quality adjustment. When a picture command is input from the command switch S12 or the remote control light receiving unit 200, in P220, the current R
The picture mode stored by the flag in the AM 100c and the image quality D / A value are displayed on the screen by the OSD. After the timer t9 has timed out (P221), if no picture command, plus command (described later) or minus command (described later) has been input (P222)
Deletes the information being displayed by the OSD in P225.
By the time the timer t9 of P221 expires, P
If any of the above three instructions is input at 222, P
At 223, it is determined whether or not this is a picture one instruction, and if it is not a picture instruction, it is determined at P226 whether it is a plus instruction or a minus instruction, and the processing shifts to each (P227, P22).
8). If it is a picture command in P223, the next picture mode is stored as a flag in the RAM 100c in P224, and the process returns to P220. The picture mode is switched every time a picture command is input in the order shown in FIG. 36 (color tone → color density → contrast → brightness → sharpness →...).

As described above, when the command relating to the image quality adjustment is not input for a predetermined time (t9), the command is terminated.

FIG. 29 is a flowchart showing a process when a brass command is input from the command switch S10 or the remote control light receiving unit 200 in a state where the image quality adjustment mode is selected.

In P230, the counter for counting the number of command inputs is reset. P231 sets the image quality D / A value in the RAM 100c of the currently selected and displayed picture mode to 1
The signal is output to the step-up D / A converter 270. P2
At 32, the image quality D / A value displayed by the OSD is updated. If the counter is 0, the counter is incremented by 1 after the time elapses by the timer t11, and if there is no command input for any of the picture command, the plus command, and the minus command (P233, P23)
5, P236, P237), timer t12 at P240
After the time-up, the same command check is performed again in P241, and if there is no command input, the display on the OSD is deleted in P243 and control is returned. If any of the above three instructions is input in P241, the counter is reset in P242 and the control is shifted to P238. In P237, when any one of the above three instructions is input, P238
Then, it is determined whether the input is a picture command. If the command is a picture command, the next picture mode is stored as a flag in the RAM 100c, and control is transferred to the picture processing. If the command input is a minus command (P239), the control is shifted to minus processing. Until P239, if there is no instruction, the plus instruction has been input again.
The same processing is performed again from 31. The timer t10 of P234 determines the sampling time when commands are continuously input. Thus, for example, t11
Is set to 1 second, t10 is set to 03 seconds, and t12 is set to 3 seconds. If the input of the plus command is within 1 second, the input becomes a step input.
Continuous processing is performed assuming that there is a batch input, and if there is no input for 3 seconds or more, the image quality adjustment mode ends.

FIG. 30 is a flowchart showing the processing when a minus command is input from the command switch S9 or the remote control light receiving unit 200 in the state where the image quality adjustment mode is selected. A series of processing starting from P250 is during the processing of the above-described plus instruction (P230 to P230).
P244), the procedure of reducing the image quality D / A value by one step in P251, and outputting it to the D / A converter 270, and the procedure of P2
The only difference is the procedure to determine whether the input is a plus command at 59.
Similar processing is performed. (P250-P264).
For example, the timer t14 of P255 is 1 second, the timer t13 of P254 is 0.3 seconds, and the timer t15 of P260 is
Is set to 3 seconds, if the input of the minus command is within 1 second, it becomes a step input. If the input exceeds 1 second, it is assumed that there are about 3 inputs per second and the continuous processing is performed. If there is no input, the image quality adjustment mode ends.

FIG. 31 is a flowchart showing a process for setting the image quality D / A values in the RAM 100c of all picture modes in the image quality adjustment mode to standard values.
When a standard command is input from the command switch S11 or the remote control light receiving unit 200, the fact that the screen is the standard value is displayed by the OSD in P270, and the image quality D / A value in the RAM 100c in all picture modes is set to the standard value in P271. Set. Note that this standard value is stored in the ROM 100b in advance. The D / A values of all the picture modes set here are output to the D / A converter 270 (P
272). After the timer t16 expires, the OSD display is deleted (P273, P274).

FIG. 32 is a flowchart showing a process for increasing the volume by adjusting the volume. When a volume increase command is input from the command switch S5 or the remote control light receiving unit 200, P
At 280, the counter for counting the number of command inputs is reset. In P281, the volume D / A value in the RAM 100c is increased by one step. The increased volume D / A value is output to the D / A converter 270 in P282, and the current volume is output to the screen by the OSD in P283. If the command input is the first time in P284, the counter is increased by one step after the time-out of the timer t18 in P286 (P287), it is determined in P288 whether a volume increase or volume decrease command is input, and the input is counted by the timer t19. If not even after the upload (P290), the display of the OSD is erased (P291,
P293). If any one of the two instructions is input in P291, the counter is reset again in P292, and the process returns to P289. If there is an input of either of the above two commands in P288, and if it is not a volume increase command in P289, control is transferred to a process of volume reduction (described later). P28
If the command is a volume increase command at 9, the process returns to the process from P281, and the process of increasing the volume D / A value by one step while the input of the volume increase command is continued is performed every time the timer t17 is up (P285). . For example, P286
When the timer t18 is set to 1 second, the timer t17 of P285 is set to 0.3 second, and the timer t19 of P290 is set to 3 seconds, if the input of the volume increase command is within 1 second, the input becomes a step input and exceeds 1 second. In the case of input, continuous processing is performed assuming that there are approximately three inputs per second.
If there is no volume increase or volume decrease command input for more than seconds, the volume adjustment ends.

FIG. 33 is a flow chart showing a process of volume reduction by volume adjustment. When a volume reduction command is input from the command switch S4 or the remote control light receiving unit 200, P
A series of processing starting from 300 is performed during the processing of the volume increase command (P280 to P239), and the volume D / A of P301 is processed.
The same processing is performed (P300 to P313) except that the procedure for increasing the value by one step and the procedure for determining whether or not the volume reduction command is input in P309 are different. Again, for example,
When the timer t21 of P306 is set to 1 second, the timer t20 of P305 is set to 0.3 second, and the timer t22 of P310 is set to 3 seconds, if the input of the volume reduction command is within 1 second, the step input becomes 1 step. If the input exceeds this, continuous processing is performed assuming that there are approximately three inputs per second, and if there is no volume decrease or volume increase command input for three seconds or more, the volume adjustment ends.

FIG. 34 is a flowchart showing a process of silencing by adjusting the volume. When a mute command is input from the command switch S2 or the remote control light receiving unit 200,
If it is 0, it is determined whether or not the sound is already muted.
Output the minimum value of the volume to the A / A converter 270
To display the screen during mute (P321, P322).
If the sound is muted in P320, the original volume D / A value of the D / A converter 270 is output, and the mute display of the OSD is erased.

[0076]

As described above, according to the present invention, remote control of operation and automation of focus can be easily realized, and operability can be improved. Further, according to the present invention, the autofocus operation is less likely to be affected by a signal from a remote controller.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a basic configuration of the present invention.

FIG. 2 is a block diagram showing an embodiment when the present invention is configured using a microcomputer.

FIG. 3 is a block diagram showing an embodiment when the present invention is configured using a microcomputer.

FIG. 4 is a block diagram showing an embodiment when the present invention is configured using a microcomputer.

FIG. 5 is a block diagram showing an embodiment when the present invention is configured using a microcomputer.

FIG. 6 is a block diagram showing an embodiment when the present invention is configured using a microcomputer.

FIG. 7 is a block diagram showing an embodiment when the present invention is configured using a microcomputer.

FIG. 8 is a flowchart illustrating a control operation of the present invention.

FIG. 9 is a flowchart illustrating a control operation according to the present invention.

FIG. 10 is a flowchart illustrating a control operation according to the present invention.

FIG. 11 is a flowchart illustrating a control operation according to the present invention.

FIG. 12 is a flowchart illustrating a control operation according to the present invention.

FIG. 13 is a flowchart illustrating a control operation according to the present invention.

FIG. 14 is a flowchart illustrating a control operation of the present invention.

FIG. 15 is a flowchart illustrating a control operation according to the present invention.

FIG. 16 is a flowchart illustrating a control operation of the present invention.

FIG. 17 is a flowchart illustrating a control operation according to the present invention.

FIG. 18 is a flowchart illustrating a control operation according to the present invention.

FIG. 19 is a flowchart illustrating a control operation according to the present invention.

FIG. 20 is a flowchart illustrating a control operation according to the present invention.

FIG. 21 is a flowchart illustrating a control operation according to the present invention.

FIG. 22 is a flowchart illustrating a control operation according to the present invention.

FIG. 23 is a flowchart illustrating a control operation of the present invention.

FIG. 24 is a flowchart illustrating a control operation of the present invention.

FIG. 25 is a flowchart illustrating a control operation of the present invention.

FIG. 26 is a flowchart illustrating the control operation of the present invention.

FIG. 27 is a flowchart illustrating a control operation of the present invention.

FIG. 28 is a flowchart illustrating a control operation of the present invention.

FIG. 29 is a flowchart illustrating the control operation of the present invention.

FIG. 30 is a flowchart illustrating a control operation of the present invention.

FIG. 31 is a flowchart illustrating a control operation of the present invention.

FIG. 32 is a flowchart illustrating a control operation of the present invention.

FIG. 33 is a flowchart illustrating the control operation of the present invention.

FIG. 34 is a flowchart illustrating the control operation of the present invention.

FIG. 35 is a diagram showing the order of input source examples switched by the mode selection command of the present invention.

FIG. 36 is a diagram showing the order of adjustment item examples at the time of image quality adjustment switched by a picture command according to the present invention.

FIG. 37 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Input means 2 ... Instruction discrimination means 3 ... Power supply control means 4 ... Input switching means 5 ... Video processing means 6 ... Audio processing means 7 ... Lens control means 8. ..Fan motor control means 9 display means 10 non-lighting detection means 20 temperature detection means 30 alarm generation means 50 timer means 100 control section 120 Input device 130 ・ ・ ・ Display device 140 ・ ・ ・ Alarm device 210 ・ ・ ・ No light detector 211 ・ ・ ・ Temperature detector 220 ・ ・ ・ Main power control device 221 ・ ・ ・ ・ Light source power control device 230 ・ ・ ・Input switching device 240: Fan motor control device 245: Fan motor 250: Storage device 260: Lens control device 270: D / A converter

Continuation of the front page (58) Fields investigated (Int.Cl. ⁶ , DB name) H04N 5/00 H04N 5/66-5/74 G03B 21 / 00,21 / 132 G09F 9/00 G09G 3/00-3 / 36

Claims (2)

(57) [Claims] 1. A projector controllable by a remote controller, comprising: a receiving unit for receiving a signal from the remote controller; and a standby state when the receiving unit receives a signal during an autofocus operation of the lens. And means for performing the following. 2. A method for controlling a projector, comprising: a receiving unit that receives a signal from a remote controller; and a unit that performs autofocus of a lens, wherein the projector is controllable by the remote controller. A method for controlling a projector, comprising a step of setting the autofocus operation to a standby state when receiving is performed by a receiving unit.