JP2012128309A - Projector and control method for projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out authentication by use of a personal identification number in a case where an operation from an input operation unit is detected after starting takes place by direct power on.SOLUTION: A projector 1 according to the present invention, which can set the direct power on for automatically turning on a lamp light-up power source by detecting the on-state of an AC power source, comprises: a control unit 10 for controlling each unit; an input operation unit 22 for performing a setting operation; a storage unit 12 for storing a setting condition and state; and a video projection unit 20 for projecting a video. When the direct power on is set, the control unit 10 refers to an authenticating flag stored in the storage unit 12 before an input video is projected. If the authenticating flag is on or when an operation from the input operation unit 22 is performed during the projection of the video, the control unit 10 refers to a key detection authentication flag stored in the storage unit 12. If the key detection authentication flag is on, an authentication screen is projected from the video projection unit 20.

Description

  The present invention relates to a projector that projects an image based on an input video signal and a control method for the projector.

  In recent years, devices such as projectors and monitors have been designed to authenticate by entering a personal identification number at the time of use in order to prevent theft and unauthorized use.

  For example, a projector described in Patent Document 1 has been proposed as a projector that detects authentication and requests authentication.

JP 2006-308826 A

  However, there is a problem that it is very troublesome as an operation to authenticate each time a regular user uses a projector or the like.

  Some projectors are suspended from a ceiling and have a direct power-on function in which power is turned on at the same time as power is supplied through AC connection. However, in such a projector, there is a problem that the convenience of the direct power-on function is lost if authentication is performed each time the projector is activated.

  In addition, the projector described in Patent Document 1 requires a mechanism for detecting a change in use state, which causes a problem that the product cost increases.

  The present invention has been made in view of the above circumstances, and can be authenticated by a personal identification number when activated by direct power-on or when an operation from the input operation unit is detected during projection of an input image. It is an object to provide a simple projector and a control method thereof.

  As an embodiment, the above-described problem is solved by a solution as disclosed below.

  The disclosed projector is a projector that projects an image based on an input video signal, and can be set to direct power-on to automatically turn on the lamp lighting power by detecting that the AC power is turned on. The control unit that controls each part in the projector, the input operation unit that performs the setting operation of the projector, the storage unit that stores the setting conditions and state of the projector, and the image projection unit that projects and displays an image The control unit refers to the authentication flag stored in the storage unit before projecting an image based on an input video signal when the direct power on is set. The key stored in the storage unit when the authentication flag is on or when an operation from the input operation unit is performed during projection of the image. Referring to output authentication flag, the key detection authentication flag If on, characterized in that to project the authentication screen operating for PIN of the projector from the image projection unit. According to this, when it is activated by direct power-on, or when an operation from the input operation unit is detected during projection of an input image, authentication by a personal identification number can be performed. Therefore, an effect of preventing theft and unauthorized use can be achieved.

  Further, the control unit compares the operation code number set in advance and stored in the storage unit with the code number input by the input operation unit, and the two numbers match. In addition, the authentication flag and the key detection authentication flag are both turned off and stored in the storage unit, and the projection of the authentication screen for the operation code by the video projection unit is stopped. According to this, when the authentication by the personal identification number is established, the output of the authentication screen can be stopped and the video screen from the externally connected device that is in the normal use state can be output. In addition, once authentication is performed during input image projection after direct power-on, it is not necessary to authenticate each time an input operation is performed until the power is turned off, eliminating complicated authentication procedures. Become.

  Further, the control unit compares the password for operation set in advance and stored in the storage unit with the password entered by the input operation unit, and the two numbers do not match. The authentication flag is turned on and stored in the storage unit, and the operation of the projector is terminated. According to this, when the authentication by the personal identification number is not established, the operation of the projector can be terminated and the projector cannot be used. Further, since the authentication flag is stored as ON, it can be disabled after that unless authentication is established.

  In addition, when the direct power on is set, the control unit refers to the authentication flag stored in the storage unit before projecting an image based on an input video signal, and performs the authentication. When the middle flag is off, the key detection authentication flag is turned on and stored in the storage unit, and an image based on the input video signal is projected from the video projection unit. According to this, when the operation flag is turned off, the key detection authentication flag is turned on, so that when the operation from the input operation unit is detected during the projection of the input video, the authentication by the password is performed. Can do. Also, authentication is performed when an operation from the input operation unit is detected while projecting the input video while ensuring the convenience of the direct power-on function by eliminating the need for authentication at each activation by direct power-on. It becomes possible.

  The disclosed projector control method can be set to direct power on to detect that the AC power is turned on and automatically turn on the lamp lighting power, and to control each part in the projector; An image based on an input video signal, comprising: an input operation unit that performs a setting operation of the projector; a storage unit that stores setting conditions and states of the projector; and a video projection unit that projects and displays an image. And (a) an authenticating flag stored in the storage unit before projecting an image based on an input video signal when the direct power on is set. And (b) a key detection authentication frame stored in the storage unit when an operation is performed from the input operation unit during projection of the image. And (c) projecting, from the image projection unit, an authentication screen for the operation code of the projector when the authentication flag is on or the key detection authentication flag is on. And. According to this, when it is activated by direct power-on, or when an operation from the input operation unit is detected during projection of an input image, authentication by a personal identification number can be performed. Therefore, an effect of preventing theft and unauthorized use can be achieved.

  In addition, after the step (c), (d) comparing the operation code set in advance and stored in the storage unit with the code entered by the input operation unit; And when the two numbers match, the authentication flag and the key detection authentication flag are both turned off and stored in the storage unit, and the projection of the authentication code for the operation password by the video projection unit is stopped. It is characterized by that. According to this, when the authentication by the personal identification number is established, the output of the authentication screen can be stopped and the video screen from the externally connected device that is in the normal use state can be output. In addition, once authentication is performed during input image projection after direct power-on, it is not necessary to authenticate each time an input operation is performed until the power is turned off, eliminating complicated authentication procedures. Become.

  In addition, after the step (c), (e) comparing the operation code set in advance and stored in the storage unit with the code input by the input operation unit; When the two numbers do not match, the authenticating flag is turned on and stored in the storage unit, and the operation of the projector is terminated. According to this, when the authentication by the personal identification number is not established, the operation of the projector can be terminated and the projector cannot be used. Further, since the authentication flag is stored as ON, it can be disabled after that unless authentication is established.

  In addition, after the step (a), (f) when the authentication flag is off, the key detection authentication flag is turned on and stored in the storage unit, and an image based on the input video signal is projected into the image A step of projecting from the unit. According to this, when the operation flag is turned off, the key detection authentication flag is turned on, so that when the operation from the input operation unit is detected during the projection of the input video, the authentication by the password is performed. Can do. Also, authentication is performed when an operation from the input operation unit is detected while projecting the input video while ensuring the convenience of the direct power-on function by eliminating the need for authentication at each activation by direct power-on. It becomes possible.

It is the schematic which shows the example of a structure of the projector which concerns on embodiment of this invention. It is a block diagram for demonstrating the example of a structure of the projector which concerns on embodiment of this invention. 5 is a flowchart for explaining an example of a projector control method according to an embodiment of the invention. It is the schematic which shows the example of the authentication screen projected by the projector which concerns on embodiment of this invention. It is the schematic which shows the example of the warning screen projected by the projector which concerns on embodiment of this invention.

  Hereinafter, a projector 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiments, and the repetitive description thereof may be omitted.

  The projector 1 according to the present embodiment projects a video (hereinafter referred to as “input video”) based on a video signal input from an external device and displays the input video on a projection surface such as a screen or a wall surface. It is. The projector 1 according to the present embodiment is configured to be capable of direct power-on setting that automatically turns on the lamp lighting power source upon detecting that the AC power source is turned on.

FIG. 1 is a perspective view showing a projector according to the present embodiment.
As shown in FIG. 1, the projector 1 has a configuration in which the apparatus main body is housed in a housing 2. A projection lens 13 that projects an image on the projection surface is exposed on the front surface 2 a of the housing 2, and an input operation unit 22 for giving various instructions to the projector 1 on the upper surface 2 b of the housing 2. A main body key 22B is provided. In addition, the projector 1 includes a remote controller 22A as an input operation unit 22 capable of remote operation, and a remote control light receiving unit for receiving an infrared operation signal transmitted from the remote control 22A is provided on the front surface 2a of the housing 2. 24 is provided. The back surface (not shown) of the housing 2 is provided with a plurality of input terminals, and a video signal can be input from an external connection device (video supply device) such as a personal computer or various video playback devices. It has become.

Next, an example of the configuration of the projector 1 will be described with reference to the block diagram of FIG.
As shown in FIG. 2, the projector 1 includes a control unit 10, a storage unit 12, an input selection unit 14, a video processing unit 16, a video output unit 18, a video projection unit 20, and an input operation unit 22 (here, a remote controller 22A). , Main body key 22B), remote control light receiving unit 24, key input processing unit 26, power supply unit 30 and the like.

  As shown in FIG. 2, each component provided in the projector 1 is supplied with necessary power from a power supply unit 30 connected to an AC power supply (not shown) via the control unit 10, and the control unit 10 is controlled. Each of the configurations will be described focusing on the configuration characteristic of the present embodiment. In addition, about a well-known structure, only the name of a structure may be described in drawing etc., and detailed description may be abbreviate | omitted.

  The control unit 10 includes a CPU (Central Processing Unit), a RAM (Random Access Memory) used for temporary storage of various data, and the like, and operates according to a control program stored in the storage unit 12 to operate the projector 1. Centrally control the operation.

  The storage unit 12 includes a nonvolatile memory such as a mask ROM (Read Only Memory), a flash memory, and a FeRAM (Ferroelectric RAM). The storage unit 12 stores setting conditions and states of the projector 1, more specifically, a control program for controlling the operation of the projector 1, various setting data for defining the operation conditions of the projector 1, and the like. .

  In particular, the storage unit 12 according to the present embodiment stores a projector operating password that is referred to when performing authentication. The personal identification number is composed of, for example, a 4-digit number, and can be set to an arbitrary value by the user. In addition, the storage unit 12 stores the status of the in-authentication flag and the key detection authentication flag (on or off). Further, the storage unit 12 stores the operation mode of the projector 1, that is, whether or not direct power on is set.

  In the projector 1 according to the present embodiment, the control unit 10 uses the projector operation password set in advance and stored in the storage unit 12, and the user operates the input operation unit 22 (the remote controller 22A or the main body key 22B). Authentication is performed by comparing the entered password. In the case of inputting from the remote controller 22A when inputting the password or other operation input, the input signal is transmitted to the key input processing section 26 via the remote control light receiving section 24 and processed. . On the other hand, when input is performed from the main body key 22B, the input signal is directly transmitted to the key input processing unit 26 for processing.

  The video output unit 18 outputs the video signal of the external connection device 4 input from the input selection unit 14. In the present embodiment, as shown in FIG. 2, the video signal is input to the video processing unit 16, processed, and then output to the video output unit 18. Note that image projection onto an external screen (not shown) or the like is performed by the image projection unit 20. The image projection unit 20 includes a light source (not shown), a projection lens 13 (see FIG. 1), and the like.

  Here, the video signal input from the external connection device (for example, personal computer, video, etc.) 4 is input to the video processing unit 16 via the input selection unit 14 and processed, but a known configuration can be used. Therefore, detailed description is omitted.

  The power supply unit 30 is supplied with commercial power such as AC 100 [V] from the outside. The power supply unit 30 converts the commercial power supply (AC power supply) into a DC power supply having a predetermined voltage and supplies power to each unit of the projector 1. Further, the power supply unit 30 stops supplying power (operating power) necessary for projecting an image to each unit (power-on state) and operating power supply based on an instruction from the control unit 10. It is possible to switch between a standby state and a standby state for an operation for turning on the power.

  Next, an operation flow centering on the control method of the projector 1 will be described with reference to the flowchart of FIG.

First, the operation flow when the direct power-on is set as the operation mode will be described. The direct power-on is set in advance by operating the input operation unit 22, and the setting state is stored in the storage unit 12.
First, as shown in FIG. 3, in step S <b> 11, an external commercial power supply is turned on, and AC power is supplied to the power supply unit 30.

  Next, when detecting that power is supplied from the AC power source to the power source unit 30, the control unit 10 executes a step of reading the operation mode of the projector 1 stored in the storage unit 12 (step S12).

  Next, the control unit 10 executes a step of determining whether or not the operation mode of the projector 1 stored in the storage unit 12 is set to direct power on (step S13).

  As a result of the determination in step S13, when the operation mode of the projector 1 stored in the storage unit 12 is set to direct power on, the control unit 10 automatically turns on the lamp lighting power source. Is executed (step S14).

  On the other hand, when the operation mode of the projector 1 stored in the storage unit 12 is not set to direct power on, the control unit 10 executes a step of terminating the operation of the projector 1 and shifting to the standby state. (Step S15).

Subsequent to step S14, the control unit 10 refers to the “authenticating flag” stored in the storage unit 12 and executes a step of determining whether the authenticating flag is on or off ( Step S16).
As an example, the authenticating flag is set to “off” as an initial value after the operation mode of the projector 1 is set to direct power on.

As a result of the determination in step S16, if the authentication flag is off, the control unit 10 executes the step of turning on the “key detection authentication flag” and storing it in the storage unit 12 (step S17). This eliminates the need for authentication at each start-up by direct power-on, ensuring the convenience of the direct power-on function and authenticating when an operation from the input operation unit is detected during projection of the input video. Can be done.
As an example, the key detection authentication flag is set to “off” as an initial value after the operation mode of the projector 1 is set to direct power on.

  Following step S17, the control unit 10 executes a step of projecting an image based on the input image from the external device 4 from the image projection unit 20 (step S18).

On the other hand, as a result of the determination in step S16, if the authentication flag is on, the control unit 10 inputs the password for operating the projector 1 in the normal use state from the video output unit 18 ( A command signal is output to the video output unit 18 so that the video signal of the input screen) is output. As a result, a step of projecting the authentication screen (input screen) of the operational password is projected from the video projection unit 20 to an external screen (not shown) or the like (step S21). A display example of the authentication screen (input screen) is shown in FIG.
In this way, authentication using a personal identification number can be performed, so that the effect of preventing theft and unauthorized use is achieved. As a modification, instead of authentication with a personal identification number, authentication by operating a specific key may be considered.

  Subsequent to step S21, the control unit 10 executes a step of comparing the operation password set in advance and stored in the storage unit 12 with the password entered by the input operation unit 22 (step S22). .

  As a result of executing the step S22 and comparing the personal identification numbers, if the two numbers match, the control unit 10 outputs a command signal for outputting the video signal of the authentication code for the operational personal identification number from the video output unit 18. To stop projecting the authentication code authentication screen (input screen). Here, the two numbers are an operation code set in advance and stored in the storage unit 12, and a code entered by the input operation unit 22. Accordingly, the projector 1 executes a step of shifting to a state where normal use is possible, that is, a state where projection based on a video signal input from an externally connected device (for example, a personal computer or a video) 4 is performed ( Step S25).

  At the same time, the control unit 10 executes a step of turning off the authentication flag and storing it in the storage unit 12 (step S23), and executes a step of storing the key detection authentication flag in the storage unit 12 as off (step S23). Step S24). As a result, once authentication is performed during input video projection after direct power-on, it is not necessary to perform authentication every time an input operation is performed until the power is turned off.

  On the other hand, if the two numbers do not match as a result of executing Step S22 and comparing the passwords, the control unit 10 executes the step of turning on the authentication flag and storing it in the storage unit 12 (Step S22). S26).

  At the same time, the control unit 10 outputs a command signal to the video output unit 18 so that the video output unit 18 outputs a video signal of a screen that warns of failure of authentication. Thereby, a step of projecting the warning screen from the video projection unit 20 to an external screen (not shown) or the like is executed (step S27). A display example of the warning screen is shown in FIG.

  Following step S27, the control unit 10 terminates the operation of the projector 1 and executes a step of shifting to the standby state (step S28). As a result, the projector 1 becomes unusable (a state in which normal projection is not performed). That is, the anti-theft effect and the illegal use prevention effect are exhibited by this action. Even if the power is turned on after that, since the authentication flag is stored as ON in step S26, the use of the projector 1 can be disabled unless authentication is established.

Next, an operation flow when the power is turned on in the projector 1 that has shifted to the standby state in step S28 will be described.
As shown in FIG. 3, as step S <b> 31, by turning on the power switch of the input operation unit 22, AC power is supplied to the power supply unit 30, and the projector 1 shifts to a power-on state.

  Next, the control part 10 performs the step which turns on a lamp lighting power supply (step S32).

  Next, when the control unit 10 detects that power is supplied from the AC power source to the power source unit 30, the control unit 10 reads the operation mode of the projector 1 stored in the storage unit 12, and the operation mode is set to direct power-on. A step of determining whether it is set is executed (step S33).

  If the result of determination in step S33 is that the operation mode of the projector 1 stored in the storage unit 12 is set to direct power on, the control unit 10 executes step S16 described above (step S16). . The following steps are as described above and will not be described.

  On the other hand, if the operation mode of the projector 1 stored in the storage unit 12 is not set to direct power-on as a result of the determination in step S33, the control unit 10 displays the input video from the external device 4 as an input video. A step of projecting an image based on the image projection unit 20 is executed (step S34).

Next, an operation flow when the input operation unit is operated in the projector 1 that has shifted to the input image projection state in step S18 or step S34 will be described.
As shown in FIG. 3, as step S <b> 41, the control unit 10 detects the operation when all or a predetermined part of the keys of the input operation unit 22 are operated during the projection of the input video.

  Next, the control unit 10 refers to the “key detection authentication flag” stored in the storage unit 12 and executes a step of determining whether the authentication flag is on or off (step) S42).

  If the result of determination in step S42 is that the key detection authentication flag is on, the control unit 10 executes step S21 described above (step S21). The following steps are as described above and will not be described.

  On the other hand, if the result of determination in step S42 is that the key detection authentication flag is off, the control unit 10 executes a step for processing the key operated on the input operation unit 22 (step S43).

  Following step S43, the control unit 10 executes a step of projecting an image based on the input image from the external device 4 from the image projection unit 20 (step S44).

  As described above, according to the disclosed projector and projector control method, significant effects can be obtained as compared with the related art. A typical example of the effect is described below.

  When activated by direct power-on or when an operation from the input operation unit is detected while projecting an input video, authentication with a personal identification number can be performed, which can prevent theft and unauthorized use. it can. On the other hand, since it is not necessary to perform authentication every time the projector is used, complicated authentication procedures can be eliminated.

  In particular, authentication is performed when an operation from the input operation unit is detected while projecting the input video while ensuring the convenience of the direct power-on function by eliminating the need for authentication at every activation by direct power-on. It becomes possible.

  Further, a mechanism for detecting a change in use state, such as the projector described in Patent Document 1, is unnecessary, and an increase in product cost can be suppressed.

  Although the present invention has been specifically described above based on the embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Projector, 2 housing | casing, 4 External connection apparatus, 10 Control part, 12 Memory | storage part, 13 Projection lens, 14 Input selection part, 16 Video processing part, 18 Video output part, 20 Video projection part, 22 Input operation part, 24 Remote control light receiving unit, 26 Key input processing unit, 30 Power supply unit

Claims (8)

A projector that projects an image based on an input video signal,
A direct power-on setting that detects that the AC power source is turned on and automatically turns on the lamp lighting power source, and a control unit that controls each part in the projector;
An input operation unit for performing a setting operation of the projector;
A storage unit for storing setting conditions and states of the projector;
An image projection unit for projecting and displaying an image,
The control unit refers to the in-authentication flag stored in the storage unit before projecting an image based on an input video signal when the direct power on is set. Is turned on, or when the operation from the input operation unit is performed during projection of the image, the key detection authentication flag is turned on by referring to the key detection authentication flag stored in the storage unit. In the case of the projector, the projector for projecting an authentication screen for the password for operating the projector from the video projection unit. The control unit compares the security code set in advance and stored in the storage unit with the security code input by the input operation unit, and when two numbers match, 2. The projector according to claim 1, wherein both the authentication flag and the key detection authentication flag are turned off and stored in the storage unit, and the projection of the authentication screen for the operation code by the video projection unit is stopped. . The control unit compares the operation code number set in advance and stored in the storage unit with the code number input by the input operation unit, and the two numbers do not match The projector according to claim 1, wherein the authentication flag is turned on and stored in the storage unit, and the operation of the projector is terminated. The control unit refers to the in-authentication flag stored in the storage unit before projecting an image based on an input video signal when the direct power on is set. 2. The projector according to claim 1, wherein when the key is off, the key detection authentication flag is turned on and stored in the storage unit, and an image based on the input video signal is projected from the video projection unit. A direct power-on setting that automatically detects when the AC power supply is turned on and automatically turns on the lamp lighting power supply is possible, and a control unit that controls each part in the projector and an input that performs the setting operation of the projector A control method for a projector that projects an image based on an input video signal, comprising: an operation unit; a storage unit that stores setting conditions and states of the projector; and a video projection unit that projects and displays an image. There,
(A) a step of referring to an authenticating flag stored in the storage unit before projecting an image based on an input video signal when the direct power on is set;
(B) referring to a key detection authentication flag stored in the storage unit when an operation from the input operation unit is performed during projection of the video;
(C) when the authentication flag is on, or when the key detection authentication flag is on, projecting an authentication screen of the password for operating the projector from the video projection unit;
A projector control method comprising: After step (c),
(D) The operation password set in advance and stored in the storage unit is compared with the password entered by the input operation unit, and when the two numbers match, the authentication 6. The method according to claim 5, further comprising a step of storing both the middle flag and the key detection authentication flag in the storage unit as OFF, and stopping the projection of the authentication screen of the operation code by the video projection unit. Projector control method. After step (c),
(E) Comparing the password for operation set in advance and stored in the storage unit with the code number input by the input operation unit, when two numbers do not match, The projector control method according to claim 5, further comprising a step of turning on the authentication flag, storing the flag in the storage unit, and terminating the operation of the projector. After step (a)
(F) When the authentication flag is off, the key detection authentication flag is turned on and stored in the storage unit, and a video based on the input video signal is projected from the video projection unit. The projector control method according to claim 5.

Images