JP2016131003A - Electronic apparatus and method for updating software - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily update software when different versions of drive control software are present between a unit and an electronic apparatus that can mount the unit.SOLUTION: A liquid crystal projector main unit 100 can mount a projection lens unit 107. The projection lens unit includes a storage part 122 storing information of software to be used for controlling drive means 124, while the liquid crystal projector main unit includes a storage part 103 storing information of software and an MPU 102 for controlling driving of the drive means in accordance with the information of software stored in the storage part 103. When the version of software stored in the storage part 122 is newer than the version of software stored in the storage part 103, the MPU updates the information of software stored in the storage part 103 by using the information of software stored in the storage part 122.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electronic apparatus such as a liquid crystal projector and a software update method.

  When a liquid crystal projector is used at a conference, academic meeting, exhibition, or the like, an interchangeable lens (lens unit) selected according to the usage environment such as a projection distance or a screen size may be attached to the projector body. In this case, it is necessary to adjust the projector body with respect to the interchangeable lens at the installation site. In addition, in a suspended state, the zoom and focus are controlled with a remote control. The projector main body needs to control the zoom lens and the focus lens, which are interchangeable lenses whose combinations are not known in advance, with high accuracy, for example, to move in units of several micrometers on the image plane.

  Japanese Patent Application Laid-Open No. 2005-228867 describes that the driving force of the AF motor is applied to the focusing optical system based on the actual driving amount of the AF motor and the corresponding driving amount when the focusing optical system is driven between two driving stops. An electric focusing device that calculates the backlash amount of the transmission means for transmitting is proposed. However, even if Patent Document 1 is used, it is not easy to adjust interchangeable lenses having different specifications on the projector body. For example, if the depth of field is optimized with a certain interchangeable lens, the operability of focus adjustment is reduced when the interchangeable lens is replaced with another interchangeable lens having a different gear ratio.

  Therefore, Patent Document 2 proposes a system for updating the firmware of an electronic device with the firmware of the optional device when the version of the firmware of the electronic device is older than that of the optional device when the optional device is connected to the electronic device. . According to Patent Document 2, when the electronic device is updated, the firmware and version information stored in the firmware storage unit of the option device are deleted, and the firmware storage unit is set in the work area of the option device. Also, if the version information of the option device is older than the version information of the electronic device, the firmware and version information stored in the firmware storage unit of the option device are deleted, and the firmware storage unit is set in the work area of the option device. .

Japanese Patent No. 2794595 JP 2013-101451 A

  However, in Patent Document 2, the firmware and version information stored in the option device firmware storage unit are deleted regardless of whether the version information of the option device is newer or older than the version information of the electronic device. Thereby, it is possible to secure a memory capacity of the electronic device and prevent a decrease in processing speed. However, in Patent Document 2, the optional device is subsequently detached from the electronic device and attached to another electronic device. I don't assume that. In this case, the optional device cannot update the firmware of the other electronic device having a firmware version older than the erased firmware.

  An object of the present invention is to provide an electronic device and a software update method that can be easily updated when the version of the drive control software between the unit and the electronic device to which the unit can be attached is different. To do.

  The electronic device of the present invention is an electronic device in which a unit can be mounted, and the unit stores first information relating to driving means and software used for driving control of the driving means. And the electronic device drives the drive means according to the second storage means for storing second information relating to the software and the second information stored in the second storage means. Control means for controlling the software, wherein the control means is a newer version of the software stored in the second storage means than the version of the software stored in the first storage means. In this case, the first information stored in the first storage unit is updated with the second information stored in the second storage unit.

  According to the present invention, it is possible to provide an electronic device and a software update method that can be easily updated when the version of the drive control software between the unit and the electronic device to which the unit can be attached is different. it can.

It is a block diagram of the liquid crystal projector of this embodiment. FIG. 2 is a block diagram of a storage unit on the main body side and the lens unit side shown in FIG. It is a flowchart which shows operation | movement of the program shown in FIG.

  FIG. 1A is a block diagram of the liquid crystal projector (projection display device) of the present embodiment. A liquid crystal projector is an image display device that projects and displays an image on a projection surface, and is an example of an electronic device. The present invention can be applied to other electronic devices such as a camera, a copying machine, a printer, a facsimile, a PDA, a personal computer (PC), and a mobile phone.

  The video output device 110 is a video output device such as a PC or a DVD player outside the liquid crystal projector.

  The liquid crystal projector includes a projection display device body (electronic device) 100 and a projection lens unit 107 that can be attached to the projection display device body 100. Hereinafter, the projection display apparatus main body 100 is simply referred to as “main body 100”. FIG. 1A shows a state in which the projection lens unit 107 is attached to the main body 100.

  For example, when the electronic device is a camera, the unit is an interchangeable lens, and when the electronic device is a copying machine, the unit is a duplex printing unit. When the electronic device is a laptop PC, the unit is a camera unit, a GPS unit, a printer unit, or the like.

  The main body 100 includes a video input signal processing unit 101, an MPU 102, a storage unit (first storage unit) 103, an illumination optical system 104, a signal processing unit / liquid crystal driving unit 105, a control bus 109, liquid crystal panels 115, 116, 117, A temperature detection unit 120 is included.

  The video input signal processing unit 101 is a video input interface (I / F) that inputs a digital video signal, an analog video signal, or the like from the video output device 110 and performs image processing such as resolution conversion.

  The MPU 102 is a control unit that controls each unit of the liquid crystal projector, and includes a microcomputer.

  FIG. 2 is a block diagram of the storage unit 103 and the projection lens unit 107. The storage unit 103 includes rewritable storage means such as an EEPROM. The storage unit 103 stores information on various programs (software) 130 used when controlling the driving of each unit, information on control parameters 131 used for the program, and other information (version information, etc.).

  The MPU 102 performs enlargement / reduction in order to convert the resolution of the image according to the program 130 stored in the storage unit 103, and controls driving of the zoom lens and the focus lens of the projection lens unit 107. The MPU 102 can rewrite not only the information stored in the storage unit 103 but also the information. Further, the MPU 102 can not only read but also rewrite information stored in the storage unit 122 described later.

  The image signal decoded into the RGB signal by the input signal processing unit 101 is subjected to gradation correction by the signal processing unit / liquid crystal driving unit 105. Further, after modulation by the signal processing unit / liquid crystal driving unit 105, it is output as an image signal to the liquid crystal panels 115, 116 and 117. The liquid crystal panels 115, 116, and 117 are all light modulation elements that modulate light from the light source according to the video signal, but the target color light is different. The liquid crystal panel 115 is for red and the liquid crystal panel 116 is for green. The liquid crystal panel 117 is for blue.

  The illumination optical system 104 includes a light source unit and illuminates the liquid crystal panel. The light source unit includes a light source (not shown) and a light source driving circuit, and the light source is, for example, a high-pressure mercury lamp or an LED, but is not particularly limited. The light source driving circuit drives the light source and is controlled by the MPU 102. The illumination optical system 104 illuminates the liquid crystal panel with light from a light source, and includes optical elements such as a fly-eye lens, a condenser lens, and a dichroic mirror.

  The dichroic mirror reflects light in a specific area and transmits light in other areas. First, the dichroic mirror 111 transmits the red band light R and reflects light of other wavelengths. The mirror 114 reflects (deflects) the red band light R that has passed through the dichroic mirror 111 and causes it to enter the red liquid crystal panel 115. Of the green band light G and blue band light B reflected and deflected by the dichroic mirror 111, the green band light G is reflected and deflected by the dichroic mirror 112 and enters the green liquid crystal panel 116. The blue band light B transmitted through the dichroic mirror 112 is deflected by the mirrors 113 and 118 and enters the blue liquid crystal panel 117.

  The control bus 109 is a signal line for passing various signals and commands, such as an I2C bus.

  The color lights modulated separately by the liquid crystal panels 115, 116, and 117 are synthesized by the color synthesis dichroic prism 106 and projected onto the screen (projected surface) 108 via the projection optical system provided in the projection lens unit 107. Is done.

  The projection lens unit 107 is connected to the main body 100 by a contact or a connector indicated by a mount (connection portion) 119. Thereby, the projection lens unit 107 is mechanically and electrically connected to the main body 100.

  The projection lens unit 107 includes a projection optical system (not shown), a drive unit 124 that drives the projection optical system, a drive amount detection unit (not shown), and a storage unit (second storage unit) 122.

  The projection optical system includes a plurality of lens groups such as a movable lens (for example, a zoom lens and a focus lens), a fixed lens, a driving unit, a driving amount detecting unit, and the like. The zoom lens moves in the optical axis direction of the projection optical system to change the focal length, and the focus lens moves in the optical axis direction of the projection optical system to perform focus adjustment. The driving unit 124 drives the movable lens and is configured by a motor, a gear, and the like. The drive amount detection means detects the drive amount by the drive means and is composed of an encoder or the like.

  The storage unit 122 is a rewritable storage unit such as an EEPROM. The storage unit 122 includes identification information (lens ID) of the projection lens unit 107, software information used for drive control of the drive unit 124 (for example, control parameters for determining the power of the motor that drives the drive unit 124, and software information). Version information). The MPU 102 can drive and control the driving unit 124 according to software information stored in the storage unit 103.

  The temperature detection unit 120 detects the temperature inside the housing of the main body 100. The type of temperature detection means 120 is not particularly limited, such as a resistance temperature detector, a thermocouple, a radiation type, a thermistor type, or the like. The MPU 102 may change the control method of the driving unit 124 based on the temperature detected by the temperature detecting unit 120.

  Since the installation environment of the screen 108 and the liquid crystal projector is different depending on the installation location, it is general to use the main body 100 in combination with the projection lens unit 107. For example, three types of lens units such as a wide-angle lens, a standard lens, and a telephoto lens may be properly used.

  As described above, in this embodiment, a plurality of types of units can be mounted on an electronic device, and each unit may be mounted on another electronic device. The storage unit 122 only needs to store software information for at least one type of unit among the plurality of types of units.

  When the projection lens unit 107 newly released at an exhibition is attached to the main body 100, the main body 100 is manufactured before the projection lens unit. Therefore, information on the software for controlling the driving of the driving unit 124 (only control parameters may be stored) is stored in the storage unit 122. The program 130 of the storage unit 103 reads software information (first information related to software) stored in the storage unit 122 at the time of activation, and the MPU 102 uses this information for driving control of the projection lens unit 107. Accordingly, the MPU 102 can perform drive control of the projection lens unit 107 with high accuracy.

  When the projection lens unit 107 manufactured later than that is attached to the main body 100, the MPU 102 reads the lens ID of the projection lens unit 107 from the storage unit 122 according to the program 130. Then, the MPU 102 detects that the control parameter 131 includes the control parameter corresponding to the lens ID of the projection lens unit 107. However, if the software version corresponding to the lens ID read at the time of mounting is older than the software version stored in the storage unit 122, the motor may not be controlled with an optimum torque. For this reason, it is necessary to update the software information (second information regarding the software) stored in the storage unit 103.

  Hereinafter, the focus lens will be described as an example of a movable lens of the projection optical system. When the focus lens of the projection optical system is finely driven for focus adjustment, the driving speed of the DC motor is changed by changing the duty ratio by PWM (pulse width modulation) driving. If the duty ratio is not set properly, the motor will not rotate smoothly or will rotate too much, making it difficult to make fine adjustments to the focus.

  Further, when the motor for driving the focus lens is operated at a fixed duty ratio, the viscosity of the grease fluctuates in temperature, so that it becomes difficult to move at a low temperature, or it becomes slippery at a high temperature. Therefore, the MPU 102 acquires the output of the temperature detection unit 120 as information related to the sensitivity of the motor, acquires a coefficient to be converted into a duty ratio from the storage unit 103, and changes the duty ratio according to the temperature. The MPU 102 may perform control to decrease the duty ratio when the temperature is high and increase the duty ratio when the temperature is low. For example, in the case of a lens that is driven with a duty ratio of 60% at normal temperature, the duty ratio is 55% when the temperature of the projection lens unit 107 is 50 degrees Celsius or higher, and the duty ratio is 65% when the temperature is 20 degrees Celsius or lower. To. Thereby, it is possible to drive and control the focus lens with high accuracy within the depth of field.

  Further, in order to correct the motor inertia and the gear backlash amount in the driving means, the MPU 102 acquires the output of the driving amount detection means and detects the current position of the focus lens. Table 1 shows an example of information stored in the storage unit 122.

  The storage unit 122 is configured as a rewritable ROM, and the information shown in Table 1 is stored as one of the parameters. The ROM data stores, for example, L3 which is a lens ID, 3 which is a parameter version, and 65% which is a duty ratio when the focus lens is driven. Further, a backlash amount adjustment parameter for a gear (not shown) is also stored. As a movable lens, the parameters of the zoom lens are similarly stored.

  Table 2 shows the control parameters 131 of the plurality of lens units stored in the storage unit 103. For example, since the version for the telephoto lens unit L3 is 2, the MPU 102 determines that the parameters shown in Table 1 are new, and uses the version 3 parameters shown in Table 1. Since the L3 parameter shown in Table 2 is old, the latest state can be maintained by rewriting with the L3 parameter shown in Table 1. Actually, since a nonvolatile storage medium such as EEPROM or flash ROM is used for the storage unit 103, procedures such as change of rewrite mode, electrical erasure, and write control are executed.

  Table 3 shows an example of parameters stored in the storage unit 122 of the projection lens unit L2. The shipment time of the projection lens unit L2 is earlier than the shipment time of the storage unit 103, and the version 4 shown in Table 3 is older than the version 5 of the parameter L2 shown in Table 2. In this case, using the parameters shown in Table 2 stored in the storage unit 103 can perform more suitable drive control, so the parameters stored in the storage unit 122 are rewritten.

  FIG. 3 is a flowchart showing the program 130 executed by the MPU 102, where “S” represents a step (process), Y represents Yes, and N represents No. The flowchart shown in FIG. 3 can be embodied as a program for causing a computer to execute each step as a method for updating software used for driving control of the projection lens unit 107. Such a program may be stored on a non-transitory computer readable medium.

  The flowchart shown in FIG. 3 can be executed when the main body 100 is turned on, when the projection lens unit 107 is attached to the main body, or at a timing designated by another user.

  As shown in FIG. 1B, the main body 100 has a communication unit 125, the projection lens unit 107 has a communication unit 126, and the MPU 102 and the storage unit 122 of the projection lens unit 107 are connected via the communication units 125 and 126. May be configured to be communicable. In FIG. 1B, the communication units 125 and 126 perform wireless communication, but may perform wired communication using a cable. In this case, the MPU 102 may update the software information via the communication units 125 and 126 when the projection lens unit 107 is not attached to the main body 100. This makes it possible to match the version of the drive control software between the unit and the electronic device to the latest state available at that time, regardless of whether the unit is actually attached to the electronic device.

  The MPU 102 reads the software version information of the projection lens unit 107 from the storage unit 103 (S302), and then reads the software version information of the projection lens unit 107 from the storage unit 122 (S304). The order of S302 and S304 may be reversed.

  Next, the MPU 102 determines whether or not the software version stored in the storage unit 103 is newer than the software version stored in the storage unit 122 (S306). When the MPU 102 determines that the version of software stored in the storage unit 103 is new (Y in S306), the MPU 102 updates the software information stored in the storage unit 122 with the software information stored in the storage unit 103 ( S308), the process proceeds to S310.

  In Patent Document 2, when the firmware version of the main body is new, the firmware and version information in the firmware storage section of the optional device is deleted and the firmware storage section is set as the work area of the main body. However, in this case, when the optional device is subsequently attached to another main unit whose version is older than the erased firmware, it is no longer possible to update the firmware of the other main unit. Therefore, the present embodiment solves this problem by updating the software stored in the storage unit 122 with the software stored in the storage unit 103.

  When the MPU 102 determines that the software version in the storage unit 103 is not new (N in S306), the MPU 102 determines whether the software version in the storage unit 122 is newer than the software version in the storage unit 103 (S312). ). When the MPU 102 determines that the version of the software stored in the storage unit 122 is new (Y in S312), the MPU 102 updates the software information stored in the storage unit 103 with the software information stored in the storage unit 122. Then (S314), the process proceeds to S310. At that time, the MPU 102 maintains the software information stored in the storage unit 122 without deleting it.

  In Patent Literature 2, when the firmware version of the option device is new, the firmware stored in the main body is updated with the firmware stored in the option device. In addition, the firmware and version information in the firmware storage unit of the optional device is deleted, and the firmware storage unit is set as the work area of the main body. However, in this case, when the optional device is subsequently attached to another main unit whose version is older than the erased firmware, it is no longer possible to update the firmware of the other main unit. Therefore, the present embodiment solves this problem by maintaining the software stored in the storage unit 122 after the update without erasing.

  Of the plurality of types of units, when the projection lens unit 107 whose storage unit 103 does not store software information is attached to the liquid crystal projector main body 100, the control unit 102 stores information stored in the storage unit 103. Is added to the storage unit 103. Y in S312 includes this operation.

  If the software version stored in the storage unit 103 is the same as the software version stored in the storage unit 122 (N in S314), the MPU 102 proceeds to S310. In S310, the MPU 102 determines software used for driving control of the projection lens unit 107 (S310), and ends the process. Accordingly, the MPU 102 can perform drive control of the projection lens unit 107 with high accuracy.

  Although the present embodiment has been described above, the present invention is not limited to the present embodiment, and various modifications and changes can be made without departing from the scope of the present invention.

  The present invention can be applied to the use of a system including an electronic device and a unit.

DESCRIPTION OF SYMBOLS 100 ... Projection type display apparatus main body (electronic device), 102 ... MPU (control means), 103 ... Memory | storage part (2nd memory | storage means), 107 ... Projection lens unit, 122 ... Memory | storage part (1st memory | storage means), 124: Driving means

Claims (10)

An electronic device to which a unit can be attached,
The unit includes drive means and first storage means for storing first information related to software used for drive control of the drive means,
The electronic device has a second storage unit that stores second information related to the software, a control unit that drives and controls the driving unit according to the second information stored in the second storage unit, Have
When the version of the software stored in the second storage unit is newer than the version of the software stored in the first storage unit, the control unit is stored in the first storage unit. The electronic information is updated with the second information stored in the second storage means.   The control means is stored in the second storage means when the software version stored in the first storage means is newer than the software version stored in the second storage means. The second information is updated with the first information stored in the first storage means, and the first information stored in the first storage means is not erased after the update. The electronic device according to claim 1, wherein the electronic device is maintained in the above state.   3. The control unit updates the first information or the second information when the electronic device is turned on or when the unit is attached to the electronic device. The electronic device as described in. Further comprising communication means capable of communicating with the unit;
The control unit updates the first information or the second information via the communication unit when the unit is not attached to the electronic device. The electronic device as described in. A plurality of types of units can be mounted on the electronic device, and the second storage means stores the second information for at least one type of the plurality of types of units,
The control means stores in the first storage means when a unit of the plurality of types of units in which the second storage means does not store the second information is attached to the electronic device. 5. The electronic apparatus according to claim 1, wherein the first information is added to the second storage unit. 6. It further has temperature detection means for detecting temperature,
The electronic device according to claim 1, wherein the control unit changes a control method of the drive unit based on the temperature detected by the temperature detection unit. A system having a unit and an electronic device to which the unit can be attached,
The unit includes drive means and first storage means for storing first information related to software used for drive control of the drive means,
The electronic device has second storage means for storing second information related to the software, and control means for driving and controlling the drive means in accordance with the second information stored in the second storage means. Have
When the version of the software stored in the second storage unit is newer than the version of the software stored in the first storage unit, the control unit is stored in the first storage unit. The first information is updated with the second information stored in the second storage means. Drive control of the drive means of the unit having drive means and first storage means for storing first information relating to software used for drive control of the drive means from an electronic device to which the unit is mounted A method of updating the software when
The electronic apparatus further includes second storage means for storing second information regarding the software,
The update method is:
If the version of the software stored in the second storage means is newer than the version of the software stored in the first storage means, the first version stored in the first storage means And updating the information with the second information stored in the second storage means.   A program for causing a computer to execute the updating method according to claim 8. A projection type display device main body to which a lens unit can be attached,
The lens unit includes a driving unit that drives the lens, and a first storage unit that stores first information regarding software used for driving control of the driving unit,
The projection type display device main body controls second drive means for storing second information related to the software, and drive control of the drive means according to the second information stored in the second storage means. Means,
When the version of the software stored in the second storage unit is newer than the version of the software stored in the first storage unit, the control unit is stored in the first storage unit. The projection-type display device main body, wherein the first information is updated with the second information stored in the second storage means.