JP2006098741A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device in which control data can be updated. <P>SOLUTION: The image display device is provided with an image forming means 441 which forms an image corresponding to image information, a control means 56 which controls the entire device, an image information input terminal 57 to which the image information is to be inputted and a memory 52 which records the control data. The control means 56 is provided with a data discriminating section 561 which discriminates whether update data are included in the inputted image information or not, a data extracting section 562 which extracts the update data, a modulation function detecting section 563 which detects a modulation function as reference data of the image data of the header portion of the image information, a demodulation function generating section 564 which generates a demodulation function that becomes an inverse function of the modulation function, a data demodulating section 564 which applies the demodulation function to the update data to demodulate into the update data that can be read by the control means 56 and a data updating section 565 which updates the control data based on the demodulated update data. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  According to the present invention, an image forming unit that forms an image according to input image information, a control unit that controls an apparatus main body including the image forming unit, and an image information output device are connected, and the image information is input. The present invention relates to an image display device including an image information input terminal.

Conventionally, projectors are used for presentations at conferences, academic conferences, exhibitions, and the like. Such a projector includes a light source, a light modulation element that modulates a light beam emitted from the light source according to image information to form an image, and a projection lens that enlarges and projects an image formed by the light modulation element. It is prepared for.
Such a projector is generally configured to include a CPU (Central Processing Unit) that controls the projector body, a memory, and the like, and the CPU stores control data recorded in the memory on the manufacturer side. Based on (a control program and various data), for example, control of luminance control of the light source at the time of image formation and drive control of the light modulation element is performed.

By the way, the control data is originally not changed so much, but there are cases where the control data needs to be updated due to version upgrades and problems.
Among such control data, for updating the control program, the analog data recorded on the tape by the VTR is converted into digital data via the program introduction device (adapter), and this digital data is output to the projector. A program introduction method for introducing a control program is known (for example, see Patent Document 1).

There is also known a video playback device that reads an update program from a DVD (Digital Versatile Disc) in which a version upgrade program is recorded and updates a control program recorded in a memory in the device (for example, Patent Document 2). reference).
According to the program introduction method described in Patent Document 1 and the video reproduction device described in Patent Document 2, it is possible to introduce a control program from the outside and update the control program stored in the memory. It is.

Japanese Patent Laid-Open No. 10-320183 JP 2000-1112723 A

However, in the program introduction method of Patent Document 1, since the data recorded on the tape or the like is analog data, there is a problem that a program introduction device for generating and outputting program data by digitally converting the analog data is necessary. is there.
Further, in the video playback device described in Patent Document 2, it is assumed that update data is acquired from the DVD and the control program stored in the memory of the video playback device is updated. There is a problem that the control program stored in the memory of the connected image display apparatus cannot be updated.
As described above, when the control program is updated, the program introduction method described in Patent Document 1 requires that a separate device be interposed between the update data output device and Patent Document 2. The video playback device has a problem that the video playback device needs to control a device that performs update processing.

  An object of the present invention is to provide an image that can automatically update the control data without requiring a separate device other than a device that outputs image information and without requiring control of the device. It is to provide a display device.

  In order to achieve the above object, an image display apparatus according to the present invention includes an image forming unit that forms an image according to input image information, a control unit that controls the apparatus main body including the image forming unit, and an image information output unit. An image display device including an image information input terminal to which the device is connected and the image information is input, the image display device including a rewritable memory in which control data for controlling the device body by the control unit is recorded The control means includes a data determination unit that determines whether or not the image information input from the image information input terminal includes update data for updating the control data, and the data determination unit updates the data for update. If the image data includes the update data, the image data of the header portion that does not include the update data is used as reference data. A modulation function detection unit that detects a modulation function applied to the reference data, a demodulation function generation unit that generates a demodulation function that is an inverse function of the detected modulation function, and the generated demodulation function, the update data And a data demodulator for demodulating the data for update readable by the control means, and a data updater for updating the data for control of the memory based on the demodulated data for update. To do.

Here, the control data collectively represents a control program such as firmware executed by the control means and data for controlling driving of various electronic components constituting the apparatus main body.
The image information input terminal may be an input terminal conforming to a digital connection standard such as a DVI (Digital Visual Interface) terminal and an HDMI (High Definition Multimedia Interface) terminal.

According to the present invention, the image display device can extract the update data included in the input image information and update the control data of the image display device based on the update data.
That is, when the data determination unit of the control unit determines that the input image information includes update data for updating the control data of the image display device, the data extraction unit of the control unit updates the data. Data is extracted. The modulation function detector detects the modulation function using the image data as reference data, and the demodulation function generator generates a demodulation function for demodulating the update data into update data that can be read by the control means. Based on the function, the data demodulator demodulates the update data. Based on the demodulated update data, the data update unit updates the memory control data.
Therefore, it is possible to automatically execute the control data update process without requiring any other device than the image information output device connected to the image display device and without requiring the control by the device.

In addition, when the control data is updated by the control means, the update data is output by being included in the image information, so there is a possibility that adjustment is performed by the video reproduction apparatus. Specifically, correction such as image quality adjustment applied to the image information may be applied to the update data. In such a case, even if the output update data is used as it is, it may not be read by the control means. In such a case, the control data update process may not be performed properly, and a malfunction may occur in the operation of the image display apparatus.
On the other hand, in the present invention, the modulation function detection unit detects the modulation function applied to the update data, generates a demodulation function corresponding to the modulation function by the demodulation function generation unit, and The update data is demodulated based on the demodulation function. According to this, since the update data extracted from the image information can be demodulated into update data that can be read by the control means, the control data is updated based on the demodulated update data, In addition, control data update processing can be performed.

  Further, the modulation function detection unit detects the modulation function using the image data in the header portion as reference data, and the demodulation function generation unit generates a demodulation function corresponding to the modulation function. Regardless of what kind of correction is applied, the update data can be reliably demodulated into update data that can be read by the control means.

The present invention includes a reference table storage unit that stores a reference table in which a plurality of modulation functions and a demodulation function for each modulation function are associated, and the demodulation function generation unit generates a demodulation function based on the reference table It is preferable to do.
According to the present invention, based on the reference table stored in the reference table storage unit, the demodulation function generation unit can generate a demodulation function for the modulation function detected by the modulation function detection unit. According to this, since the demodulation function is selected and generated from the demodulation functions stored in advance in the reference table, the time required for generating the demodulation function can be reduced as compared with the case where a demodulation function corresponding to the modulation function is newly generated. Can be shortened. Therefore, the control data update process can be performed in a shorter time.

In the present invention, the control means includes a blank other than an image based on image information input to the image forming unit during execution of the modulation function detection unit, the demodulation function generation unit, the data demodulation unit, and the data update unit. It is preferable that a blank image formation command unit for forming an image is provided.
Here, if update data is included in the image information, the image information may not be used as data for image formation. In such a case, if image formation is performed based on input image information, a distorted image is formed, which may cause discomfort to the user. In the image display device of the present invention, during the control data update process, at least one of the modulation function detection unit, the demodulation function generation unit, the data modulation unit, and the data update unit is being executed.
In such a case, since a blank image is formed by the image forming means by the blank image formation command unit, it is possible to prevent the user from feeling uncomfortable.
The image forming unit may form an image indicating that the control data is being updated. In this case, the user can be surely notified that the control data is being updated.

In the present invention, the image information including the update data includes footer image data in a footer portion not including the update data, and the control unit detects the footer image data by the data determination unit. The data extraction unit extracts update data, the modulation function detection unit detects a modulation function, the demodulation function generation unit generates a demodulation function, and the data demodulation unit demodulates the update data It is preferable that an end recognition unit for recognizing the end of update of the control data when the control data is updated by the data update unit is provided.
According to the present invention, the detection of the footer image data by the data determination unit is used as a trigger to recognize that the processes of the data extraction unit, the modulation function detection unit, the demodulation function generation unit, the data demodulation unit, and the data update unit have been completed. Since the end recognition unit is provided, the end of the control data update process can be accurately recognized. Accordingly, it is possible to cause the image recognition unit to form an image indicating that the update process of the control data has been completed and notify the user that the update process has been completed.

In the present invention, it is preferable that the control means includes a demodulation correctness determination unit that determines whether or not the update data demodulated by the data demodulation unit has a demodulation error.
Detection of a demodulation error by such a demodulation correctness determination unit calculates a checksum value of the demodulated update data, and compares the checksum value with a check value for the checksum value, thereby detecting a demodulation error. This can be a detection method for determining whether or not there is any.
According to the present invention, the demodulation correctness determination unit determines whether there is a demodulation error in the demodulated update data, that is, whether the demodulated update data is data that can be read by the control means. Is done. As a result, the reliability of the update data, and hence the reliability of the control data subjected to the update process, can be improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
(1) Connection Mode of Projector 1 FIG. 1 is a diagram showing a connection mode of the projector 1 according to the present embodiment.
As shown in FIG. 1, the projector 1 is connected to an image information output device 10, forms an image according to image information input from the image information output device 10, and enlarges and projects the image.

Examples of the image information output device 10 include a player 10A and a personal computer 10B that reproduce media such as a DVD (Digital Versatile Disc) and a CD (Compact Disc) and output image information recorded on the media. it can.
Further, the connection format between the projector 1 and the image information output device 10 can be a connection format compliant with a digital connection standard such as DVI (Digital Visual Interface) standard and HDMI (High Definition Multimedia Interface) standard.

The projector 1 includes a synthetic resin casing 2 having a substantially rectangular parallelepiped shape, and an apparatus main body (not shown) housed in the casing 2.
The apparatus main body supplies the driving power to the optical unit 4 that performs image formation and enlargement projection of the formed image, the control board 5 that performs drive control of the apparatus main body including the optical unit 4 according to input image information, and the like. And a power supply unit (not shown).
Among these, the power supply unit converts an alternating current input from an external power source into a direct current, converts the direct current into a predetermined voltage corresponding to an electronic component constituting the apparatus main body, and supplies the converted voltage to the electronic component. Then, an AC rectangular wave current is generated from the DC current and supplied to the light source device 411 of the optical unit 4 to be described later.

(2) Configuration of Optical Unit 4 FIG. 2 is a diagram schematically showing the configuration of the optical unit 4.
The optical unit 4 modulates the light beam emitted from the light source device according to image information to form an image, and forms a projection image on a projection surface such as a screen via the projection lens 3. As shown in FIG. 2, the optical unit 4 integrates the projection lens 3, the integrator illumination optical system 41, the color separation optical system 42, the relay optical system 43, the light modulation device, and the color synthesis optical device. The optical device 44 is broadly functionally divided into an optical component housing 45 in which the optical components 41, 42, 43, and 44 are accommodated.
Among these, although the detailed illustration is omitted, the projection lens 3 is configured as a combined lens in which a plurality of lenses are housed inside the lens barrel 3A.

  The integrator illumination optical system 41 is an optical system for making the luminous flux emitted from the light source uniform in the illumination optical axis orthogonal plane. The integrator illumination optical system 41 includes a light source device 411, a first lens array 412, a second lens array 413, a polarization conversion element 414, and a superimposing lens 415.

The light source device 411 includes a light source lamp 411A as a radiation light source, a reflector 411B, and an explosion-proof glass 411C that covers a light beam emission surface of the reflector 411B. Then, the radial light beam emitted from the light source lamp 411A is reflected by the reflector 411B to become a substantially parallel light beam, and is emitted to the outside.
In the present embodiment, a high-pressure mercury lamp is used as the light source lamp 411A. However, the present invention is not limited to this, and for example, a metal halide lamp or a halogen lamp may be used. Moreover, although the parabolic mirror is employ | adopted as the reflector 411B, you may employ | adopt the structure which has arrange | positioned the collimating concave lens not only to this but to the output surface of the reflector which consists of an ellipsoidal mirror.

The first lens array 412 has a configuration in which small lenses having a substantially rectangular outline when viewed from the illumination optical axis direction are arranged in a matrix. Each small lens splits the light beam emitted from the light source lamp 411A into partial light beams and emits them in the direction of the illumination optical axis.
The second lens array 413 has substantially the same configuration as the first lens array 412, and includes a configuration in which small lenses are arranged in a matrix. The second lens array 413 has a function of forming an image of each small lens of the first lens array 412 on liquid crystal panels 441R, 441G, and 441B described later of the optical device 44 together with the superimposing lens 415.

The polarization conversion element 414 converts the light from the second lens array 413 into approximately one type of polarized light, thereby improving the light use efficiency in the optical device 44.
Specifically, each partial light beam converted into approximately one kind of polarized light by the polarization conversion element 414 is finally substantially superimposed on liquid crystal panels 441R, 441G, 441B, which will be described later, of the optical device 44 by the superimposing lens 415. . In a projector using liquid crystal panels 441R, 441G, and 441B of a type that modulates polarized light, only one type of polarized light can be used, and therefore approximately half of the light flux from the light source lamp 411A that emits randomly polarized light is not used. For this reason, the use efficiency of light in the optical device 44 is enhanced by converting the light beam emitted from the light source lamp 411A into substantially one type of polarized light using the polarization conversion element 414. Such a polarization conversion element 414 is introduced in, for example, Japanese Patent Application Laid-Open No. 8-304739.

The color separation optical system 42 includes two dichroic mirrors 421 and 422 and a reflection mirror 423. A plurality of partial light beams emitted from the integrator illumination optical system 41 are separated into three color lights of red (R), green (G), and blue (B) by two dichroic mirrors 421 and 422.
The relay optical system 43 includes an incident side lens 431, a pair of relay lenses 433, and reflection mirrors 432 and 435. The relay optical system 43 has a function of guiding blue light, which is color light separated by the color separation optical system 42, to a liquid crystal panel 441B described later of the optical device 44.

  At this time, in the dichroic mirror 421 of the color separation optical system 42, among the light beams emitted from the integrator illumination optical system 41, the green light component and the blue light component are transmitted, and the red light component is reflected. The red light reflected by the dichroic mirror 421 is reflected by the reflection mirror 423, passes through the field lens 419, and reaches the red liquid crystal panel 441R. The field lens 419 converts each partial light beam emitted from the second lens array 413 into a light beam parallel to the central axis (principal ray). The same applies to the field lens 419 provided on the light incident side of the other liquid crystal panels 441G and 441B.

Of the blue light and green light transmitted through the dichroic mirror 421, the green light is reflected by the dichroic mirror 422, passes through the field lens 419, and reaches the liquid crystal panel 441G for green light. On the other hand, the blue light passes through the dichroic mirror 422, passes through the relay optical system 43, passes through the field lens 419, and reaches the blue light liquid crystal panel 441B.
Note that the relay optical system 43 is used for blue light because the optical path length of the blue light is longer than the optical path lengths of the other color lights, thereby preventing a decrease in light use efficiency due to light divergence or the like. It is to do. That is, this is to transmit the partial light beam incident on the incident side lens 431 to the field lens 419 as it is. The relay optical system 43 is configured to pass blue light of the three color lights, but is not limited thereto, and may be configured to pass red light, for example.

  The optical device 44 modulates an incident light beam according to image information to form a color image. The optical device 44 includes three incident-side polarizing plates 442 on which the respective color lights separated by the color separation optical system 42 are incident, and a liquid crystal panel 441 as a light modulation device disposed at the subsequent stage of the incident-side polarizing plate 442. (441R, 441G, 441B), an exit-side polarizing plate 444, and a cross dichroic prism 445 as a color synthesizing optical device.

  The liquid crystal panels 441 (441R, 441G, 441B) correspond to the image forming means of the present invention. The liquid crystal panel 441 uses, for example, a polysilicon TFT as a switching element, and liquid crystal is hermetically sealed in a pair of transparent substrates arranged opposite to each other. The liquid crystal panels 441R, 441G, and 441B modulate and emit the light beam incident through the incident side polarizing plate 442 according to image information.

The incident side polarizing plate 442 transmits only polarized light in a certain direction out of each color light separated by the color separation optical system 42 and absorbs other light beams. A polarizing film is attached to a substrate such as sapphire glass. It has been done.
The exit side polarizing plate 444 is also configured in substantially the same manner as the incident side polarizing plate 442, and transmits only polarized light in a predetermined direction among the light beams emitted from the liquid crystal panels 441R, 441G, and 441B, and transmits the other light beams. The polarization axis of the polarized light that is absorbed and transmitted is set to be orthogonal to the polarization axis of the polarized light that is transmitted by the incident-side polarizing plate 442.

  The cross dichroic prism 445 forms a color image by synthesizing optical images emitted from the emission-side polarizing plate 444 and modulated for each color light. In the cross dichroic prism 445, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are provided in a substantially X shape along the interfaces of four right-angle prisms. Three color lights are synthesized by the dielectric multilayer film.

  Although not shown in detail, the optical component housing 45 is composed of a component storage member that is open at the top and is formed in a box shape, and a lid member that covers the opening of the component storage member. Among these, a large number of groove portions are formed in the component storage member, and by inserting the components constituting the optical components 41, 42, 43, and 44 into these grooves, each component becomes a component storage member. Stored.

(3) Configuration of Control Board 5 FIG. 3 is a block diagram showing the configuration of the control board 5.
As shown in FIG. 3, the control board 5 stores a frame memory 51 into which image information is input from the image information output device 10 via the image information input terminal 57, image display setting information, and control data. A flash memory 52, a RAM (Random Access Memory) 53 for storing update data for updating control data, a ROM (Read Only Memory) 54 for storing a reference table to be described later, and a liquid crystal panel 441 A display control system 55 that controls driving and a main control system 56 that controls driving of the apparatus main body are provided.
Among these, the frame memory 51 is connected to the image information input terminal 57 and temporarily holds image information input via the image information input terminal 57.

  The flash memory 52 corresponds to the memory of the present invention and is configured to be electrically rewritable. The flash memory 52 is referred to when image display setting data referred to when the liquid crystal panel 441 is driven and controlled by the display control system 55 described later, and when the apparatus main body drive control is performed using the main control system 56 described later. Control data is stored. For this reason, the flash memory 52 includes an image display setting data storage area 521 for storing image display setting data, and a control data storage area 522 for storing control data.

Here, the image display setting data represents, for example, image quality information such as hue, color density, contrast, sharpness, and brightness of an optical image formed by the liquid crystal panel 441.
Further, the control data collectively represents a control program such as firmware executed by the main control system 56 and data for controlling driving of various electronic components.

The RAM 53 stores update data included in the image information input to the frame memory 51, and functions as a working memory when the control data is updated by the main control system 56 described later. For this reason, the RAM 53 includes an update data storage area 531 for storing update data.
The ROM 54 corresponds to the reference table storage unit of the present invention, and stores a reference table. For this reason, the ROM 54 includes a reference table storage area 541 for storing the reference table.

The display control system 55, together with the main control system 56, constitutes the control means of the present invention.
The display control system 55 includes an image formation control unit 551, a blank image formation unit 552, and an end image formation unit 553.

  The image formation control unit 551 controls driving of the liquid crystal panel 441, reads image information input to the frame memory 51, and generates a horizontal synchronization signal and a vertical synchronization signal from the frame information included in the image information. Based on these synchronization signals, the liquid crystal panel 441 (441R, 441G, 441B) is driven to form an optical image. At this time, the display control system 55 refers to the image display setting data stored in the image display setting data storage area 521 of the flash memory 52 and drives the liquid crystal panel 441 based on the image display setting data. Control.

When a blank image forming signal is input from the main control system 56 described later, the blank image forming unit 552 generates a video signal for forming a blank image by the liquid crystal panel 441 while the blank image forming signal is input. Then, the data is output to the image formation control unit 551.
In addition, when the end image forming signal is input from the main control system 56, the end image forming unit 553 generates a video signal for forming an image indicating that the control data update processing has ended by the liquid crystal panel 441. To the image forming control unit 551.

The main control system 56 includes a CPU (Central Processing Unit) and the like, and constitutes the control means of the present invention together with the display control system 55.
The main control system 56 reads the control data stored in the control data storage area 522 of the flash memory 52 and performs drive control of the apparatus body of the projector 1 based on the control data. Further, when the image information input from the image information output device 10 includes update data for updating the control data, the main control system 56 uses the update data to perform control. The control data stored in the data storage area 522 is updated.
For this reason, the main control system 56 performs a data update process for control data by a data determination unit 561, a data extraction unit 562, a modulation function detection unit 563, a demodulation function generation unit 564, a data demodulation unit 565, a demodulation correctness / incorrectness. A determination unit 566, a data update unit 567, a blank image formation command unit 568, and an end recognition unit 569 are provided.

The data determination unit 561 determines image information input to the frame memory 51.
Specifically, the data determination unit 561 is data indicating whether the image data of the header portion included in the image information is data indicating video data, or update data for updating the control data. It is determined whether. If the image data indicates video data, the data determination unit 561 outputs a signal indicating that the video data has been input to the image formation control unit 551 of the display control system 55, and the image formation control unit. The image formation by 551 is executed.
On the other hand, if the image data indicates update data, the data determination unit 561 outputs an update processing start signal for starting control data update processing to the data extraction unit 562 and the blank image formation command unit 568. .

  In addition, the data determination unit 561 determines whether image data (footer image data) indicating the end of the update data is included in a portion where the update data is not included in the image information including the update data. judge. When the data determination unit 561 detects the footer image data, the data determination unit 561 outputs a processing end signal indicating that the footer image has been detected to the data extraction unit 562 and the end recognition unit 569.

When the update processing start signal is input from the data determination unit 561, the data extraction unit 562 extracts update data from the image information held in the frame memory 51 and stores it in the update data storage area 531 of the RAM 53.
In addition, when the process end signal is input from the data determination unit 561, the data extraction unit 562 ends the extraction of the update data from the frame memory 51, and modulates the process end signal indicating that the update data extraction is completed. The data is output to the function detection unit 563, the blank image formation command unit 568, and the end recognition unit 569.
According to this, since the processing by the modulation function detection unit 563 can be started after the extraction of the update data by the data extraction unit 562 is completed, the processing load of the main control system 56 can be reduced and the extraction is performed. The reliability of the update data can be improved.
Note that the processing end signal output to the modulation function detection unit 563 may be output immediately after the data extraction unit 562 starts extracting the update data. According to this, the processing by the modulation function detection unit 563 can be started quickly.

  When the extraction completion signal is input from the data extraction unit 562, the modulation function detection unit 563 detects the modulation function added to the reference data using the image data in the header portion of the image information as the reference data. In addition, after detecting the modulation function, the modulation function detection unit 563 outputs a process end signal indicating that the modulation function has been detected to the demodulation function generation unit 564, the blank image formation command unit 568, and the end recognition unit 569.

  When the process end signal is input from the modulation function detection unit 563, the demodulation function generation unit 564 refers to the reference table stored in the reference table storage area 541 of the ROM 54. The reference table is a data table formed by maintaining a correspondence relationship between a plurality of modulation functions and demodulation functions corresponding to the modulation functions. Then, the demodulation function generation unit 564 selects a demodulation function corresponding to the modulation function detected by the modulation function detection unit 563 and is an inverse function of the modulation function from the reference table, and demodulates the update data. Generate a demodulation function for

Here, the image information input from the image information output device 10 may be output in a state in which the image information output device 10 performs modulation (data modification). For example, in the image information output device 10, when gamma correction such as image brightness and contrast is performed, not only the image information but also update data included in the image information Such modulation can be applied. For this reason, it is necessary to demodulate the update data extracted from the image information into update data that can be read by the main control system 56. Therefore, the modulation function detection unit 563 detects the modulation function, and the demodulation function generation unit 564 generates the demodulation function.
The demodulation function generation unit 564 that has generated the demodulation function outputs a processing end signal indicating that the demodulation function has been generated to the data demodulation unit 565, the blank image formation command unit 568, and the end recognition unit 569.

When the processing end signal is input from the demodulation function generation unit 564, the data demodulation unit 565 can read the update data stored in the update data storage area 531 of the RAM 53 by the main control system 56 based on the demodulation function. To correct update data. Specifically, the update data stored in the update data storage area 531 is demodulated by applying the demodulation function generated by the demodulation function generation unit 564. The update data demodulated in this way is stored again in the update data storage area 531 by the data demodulator 565.
After this processing, the data demodulation unit 565 outputs a processing end signal indicating that the demodulation of the update data is completed to the demodulation correct / incorrect determination unit 566, the blank image formation command unit 568, and the end recognition unit 569.

When the processing end signal is input from the data demodulating unit 565, the demodulation correct / incorrect determining unit 566 determines whether the demodulated update data stored in the update data storage area 531 of the RAM 53 has a demodulation error. That is, it is determined whether the update data is data that can be read by the main control system 56. Specifically, a check sum value (check sum) excluding the check value of the demodulated update data is calculated, and the check sum value is compared with the check value.
Here, if the inspection total value does not match the verification value, an update processing error signal indicating that the update of the control data has failed is output to the image formation control unit 551 of the display control system 55. The display control system 55 to which the update processing error signal is input forms an image indicating that an error has occurred during the update of the control data.
On the other hand, when the test total value matches the collation value, the demodulation correctness determination unit 566 sends a processing end signal indicating that the correctness determination of the update data has been properly completed to the data update unit 567 and blank image formation. The data is output to the command unit 568 and the end recognition unit 569.

When the processing end signal is input from the demodulation correctness determination unit 566, the data update unit 567 is the update data stored in the update data storage area 531 of the RAM 53, and is used for controlling the control data storage area 522 of the flash memory 52. Update the data.
The control data update processing is performed when the control data in the control data storage area 522 is overwritten with the update data and when the data update unit 567 executes the program included in the update data. Some data may be updated. Whether one of the cases is selected may be determined by the data update unit 567 determining the content of the update data and executing the update process. Further, the image data in the header portion may include information on whether the update process is an overwrite update or a partial update, and the update process may be executed by determining this information.
After such an update process, the data update unit 567 outputs a process end signal indicating that the update process of the control data has been completed to the blank image formation command unit 568 and the end recognition unit 569.

The blank image formation command unit 568 outputs a blank image formation signal to the blank image formation unit 552 of the display control system 55 and causes the blank image formation unit 552 to execute processing. The blank image formation command unit 568 outputs a blank image formation signal to the blank image formation unit 552 with the input of the update process start signal from the data determination unit 561 as a trigger.
The blank image formation signal by the blank image formation command unit 568 includes a data determination unit 561, a data extraction unit 562, a modulation function detection unit 563, a demodulation function generation unit 564, a data demodulation unit 565, a demodulation correct / error determination unit 566, and data. This is output until a processing end signal is input from each of the update units 567. That is, the blank image formation signal is output while the control data update process is being executed in each of the processing units 561 to 567. After the processing end signals are input from the processing units 561 to 567, the blank image formation command unit 568 stops outputting the blank image formation signal, and the end recognition unit 569 performs processing in the blank image formation command unit 568. A process end signal indicating the end is output.
Here, the blank image may include, for example, a character indicating that the control data is being updated, not only a single color image.

  When the end recognition unit 569 recognizes that the processing in each of the processing units 561 to 568 has ended, that is, when a processing end signal is input from each of the processing units 561 to 568, the end image forming unit of the display control system 55 At 553, an end image formation signal is output. By the processing of the end recognition unit 569, the control data update processing is completed.

(4) Control Data Update Processing Hereinafter, control data update processing by the main control system 56 will be described.
FIG. 4 is a diagram showing a processing flow of control data update processing by the main control system 56.
First, the data determination unit 561 of the main control system 56 determines the image data of the header portion of the image information output from the image information output device 10 and input to the frame memory 51 via the image information input terminal 57 (processing) S11). If it is determined in this process S11 that the image data in the header portion of the image information is video data, the data determination unit 561 outputs an image formation signal to the image formation control unit 551 of the display control system 55. (Process S31). The image formation control unit 551 to which the image formation signal is input refers to the frame memory 51 and drives the liquid crystal panel 441 based on the video data included in the image information to form an image (processing S32).

  On the other hand, when the data determination unit 561 determines that the input image information includes update data for updating the control data, the data determination unit 561 sends an update process start signal to the data extraction unit. 562 and the blank image formation command unit 568 (processing S12). The blank image formation command unit 568 that has received this update processing start signal outputs a blank image formation signal to the blank image formation unit 552 of the display control system 55, and a blank image is formed by the processing of the blank image formation unit 552. (Processing S13).

In addition, the data extraction unit 562 to which the update process start signal is input starts extracting update data from the image information held in the frame memory 51 and stores it in the update data storage area of the RAM 53 (process S14).
Here, the data determination unit 561 continues to monitor the content of the input image information, and determines whether the image information includes footer image data (processing S15). At this time, if the data determination unit 561 determines that the footer image data is not included, the process returns to step S14 and the data extraction unit 562 continues the extraction process of the update data.
On the other hand, when the data determination unit 561 determines that the input image information includes footer image data, the data determination unit 561 includes the data extraction unit 562, the blank image formation command unit 568, and the end recognition unit. A processing end signal is output to 569. Then, the data extraction unit 562 that has received the process end signal ends extraction of the update data (process S16). Thereafter, the data extraction unit 562 outputs a processing end signal to the modulation function detection unit 563, the blank image formation command unit 568, and the end recognition unit 569.

  The modulation function detection unit 563 to which the processing end signal is input detects the modulation function added to the image data from the image data of the header portion (processing S17). Thereafter, the modulation function detection unit 563 outputs a processing end signal to the demodulation function generation unit 564, the blank image formation command unit 568, and the end recognition unit 569.

  The demodulation function generation unit 564 to which the processing end signal is input refers to the reference table stored in the reference table storage area 541 of the ROM 54 (processing S18), selects a demodulation function corresponding to the modulation function, and updates data for update. A demodulation function to be demodulated is generated (processing S19). After this processing S19, the demodulation function generation unit 564 outputs a processing end signal to the data demodulation unit 565, the blank image formation command unit 568, and the end recognition unit 569.

  The data demodulator 565 that has received the processing end signal demodulates the update data stored in the update data storage area 531 of the RAM 53 using the demodulation function generated in the process S19 (process S20). Thereby, the update data extracted from the image information is demodulated into data that can update the control data, that is, update data that can be read by the main control system 56. After this processing S20, the data demodulating unit 565 outputs a processing end signal to the demodulation correctness / incorrectness determining unit 566, the blank image formation command unit 568, and the end recognizing unit 569.

The demodulation correctness determination unit 566 to which the processing end signal is input determines whether the update data has been demodulated appropriately. That is, it is determined whether the demodulated update data is data that can be read by the data update unit 567 of the main control system 56 (process S21). Specifically, in this process S21, the demodulation correctness determination unit 566 calculates a test total value excluding the collation value included in the demodulated update data, and compares the test sum with the collation value.
Here, if the test total value does not match the collation value, the demodulation correctness determination unit 566 performs error processing (processing S22). As such error processing, the demodulation correctness determination unit 566 outputs an error signal to the image formation control unit 551 of the display control system 55, a speaker, and an indicator (both not shown). The image formation control unit 551 to which the error signal is input drives the liquid crystal panel 441 to form an image indicating that an error has occurred in the control data update process. In addition, the speaker and the indicator to which the error signal is input execute warning sound generation and blinking processing. After such error processing is executed, the control data update processing ends.
On the other hand, when the inspection total value matches the collation value, the demodulation correctness determination unit 566 outputs a processing end signal to the data update unit 567, the blank image formation command unit 568, and the end recognition unit 569.

The data update unit 567 to which the processing end signal has been input uses the post-demodulation update data stored in the update data storage area 531 of the RAM 53 and uses the control update data stored in the control data storage area 522 of the flash memory 52. Data is updated (processing S23).
Here, whether the data update unit 567 overwrites and updates the control data from the contents of the demodulated update data, or executes the program included in the update data and partially updates the control data And the update process is executed.
After this process S23, the data update unit 567 outputs a process end signal to the blank image formation command unit 568 and the end recognition unit 569.

  The blank image formation command unit 568 to which the processing end signal has been input is that the processing end signals have been input from the processing units 561 to 567, respectively. The output of the blank image forming signal to the image forming unit 552 is stopped, and the blank image forming by the blank image forming unit 552 is stopped (processing S24). At the same time, the blank image formation command unit 568 outputs a process end signal to the end recognition unit 569.

The process recognition signal is input from the processing units 561 to 568 to the end recognition unit 569 to which the process end signal is input. Then, the end recognition unit 569 outputs an end image formation signal to the end image forming unit 553 of the display control system 55, and the end image forming unit 553 displays an end image indicating that the control data update processing has been completed. Form (process S25). Thereby, the update process of the control data is completed.
After such control data update processing, the projector 1 is restarted by inputting a reset switch (not shown), and the projector 1 enters a normal operation state. Even if there is no reset switch input, the projector 1 may be automatically restarted to enter a normal operation state after a predetermined time has elapsed since the end image formation was performed.

The projector 1 according to the present embodiment described above can achieve the following effects.
That is, the update data included in the image information input from the image information output device 10 is extracted and demodulated, and the control data stored in the control data storage area 522 of the flash memory 52 is automatically updated. Can do. Therefore, it is not necessary to separately provide other devices other than the image information output device 10 that outputs image information including update data for updating the control data of the projector 1, and the control data can be easily updated. Can do. Further, the image information output device 10 only reproduces media such as DVD and CD and outputs information recorded on the media to the projector 1 as image information. Therefore, the image information output device 10 has a special function. In addition, the control data update process can be executed without requiring control by the image information output device 10.

Further, the modulation function detection unit 563 detects the modulation function of the image information modulated by the image information output device 10, and the demodulation function generation unit 564 refers to the reference table of the ROM 54 and demodulates the demodulation function according to the modulation function. Is generated. The data demodulator 565 demodulates the update data based on the demodulation function. According to this, even when the update data included in the image information is modulated by the modulation function such as gamma correction in the process of being output from the image information output device 10, the update data is based on the demodulation function. Therefore, the data update unit 567 can reliably and appropriately demodulate the update data that can update the control data.
Furthermore, since the demodulation function generation unit 564 selects and generates the demodulation function from the demodulation function of the reference table recorded in advance in the ROM 54, it is possible to speed up the control data update process.

  The blank image formation command unit 568 forms a blank image in the blank image formation unit 552 of the display control system 55 while each of the processing units 561 to 567 is executing, that is, until a processing end signal is input from each of the processing units 561 to 567. The signal is output, and the blank image forming unit 552 causes the liquid crystal panel 441 to form a blank image. According to this, when the update information is included in the image information, it is possible to prevent an image corresponding to the image information that is not suitable for image formation from being formed, thereby causing discomfort to the user. Can be prevented.

If the data determination unit 561 determines that the image data of the image information includes footer image data indicating the end of the update data, the data determination unit 561 outputs a processing end signal to the data extraction unit 562 and extracts the data. The unit 562 ends the extraction of the update data. According to this, when the data determination unit 561 detects the end of the update data, unnecessary data is extracted as the update data, and the data is stored in the update data storage area 531 of the RAM 53 having a finite capacity. Can be prevented. Therefore, the capacity of the RAM 53 can be reduced, and the manufacturing cost of the projector 1 can be reduced.
Further, the processing end signal is input to the end recognition unit 569 from each of the processing units 562 to 568 including the data determination unit 561 that has detected the footer image data, thereby recognizing that the control data update processing has ended. can do. Accordingly, it is possible to notify the user that the update process of the control data has been completed by forming an end image.

The demodulated update data is determined by the demodulation correctness determination unit 566 to determine whether or not the update data has a demodulation error. Thereby, the reliability of the demodulated update data and the control data updated based on the update data can be improved.
Further, when there is a demodulation error in the demodulated update data, the demodulation correct / incorrect determination unit 566 outputs an error signal to the display control system 55 and the like, and the display control system 55 updates the control data. Since an image indicating that an error has occurred is formed, it is possible to reliably notify the user that an update processing error has occurred.

(5) Modification of Embodiments The best configuration for carrying out the present invention has been disclosed above, but the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
Therefore, the description limiting the shape, material, etc. disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such is included in this invention.

  In the embodiment, the demodulation function generation unit 564 selects a demodulation function for demodulating the update data by referring to the reference table of the ROM 54 and selects a demodulation function corresponding to the modulation function detected by the modulation function detection unit 563. However, other methods may be used. That is, a demodulation function that is an inverse function of the modulation function may be calculated and generated from the detected modulation function. In this case, the need for the reference table storage area 541 of the ROM 54 is eliminated, and the demodulation function can be generated by the demodulation function generation unit regardless of what modulation is applied to the image information.

  In the above embodiment, the modulation function detection unit 563 detects the modulation function after the extraction of the update data by the data extraction unit 562, that is, after the input of the processing end signal from the data extraction unit 562, Along with the extraction of the update data by the data extraction unit 562, the modulation function detection unit 563 may detect the modulation function. In such a case, the update process of the control data can be continued without waiting for completion of the extraction of the update data, so that the time required for the update process can be shortened. In the case where update processing is continued after extraction of update data is completed, the load on the CPU constituting the main control system 56 can be reduced, and the reliability of the update data can be improved.

  In the above-described embodiment, the image display setting data as the image quality information of the optical image formed by the liquid crystal panel 441, the control program executed by the main control system 56, and the drive control by the main control system 56 are used. However, the present invention is not limited to this. That is, the control data may include image display setting data. In such a case, the image information input from the image information output device 10 may include update data for updating the image display setting data, and the main control system 56 is based on the update data. However, the image display setting data stored in the flash memory 52 may be updated.

In the embodiment, the flash memory 52 is used as a rewritable memory in which control data is recorded. However, an EEPROM (Electrically Erasable Programmable Read-Only Memory) may be used, or a magnetic disk device or an optical disk. It may be a device. If a flash memory is used, writing to, referencing, updating, and erasing can be performed quickly, and the projector 1 can be downsized. In addition, when the EEPROM is adopted, the information for each storage area cannot be updated, but when the flash memory is adopted, the information can be partially updated.
Similarly, in the embodiment, the control board 5 is configured to include the frame memory 51, the RAM 53, and the ROM 54 for storing image information, update data, and a reference table. The kind of is not ask | required. That is, the memories 51, 53, and 54 may be configured with a magnetic disk device, an optical disk device, or the like as long as they can store the various data described above, regardless of the type of memory.

In the above-described embodiment, the configuration in which the optical unit 4 has a substantially L shape in plan view has been described. However, the configuration is not limited thereto, and for example, a configuration having a substantially U shape in plan view may be employed.
In the above embodiment, the transmissive liquid crystal panel 441 having a different light beam incident surface and light beam emission surface is used. However, a reflective liquid crystal panel having the same light incident surface and light emission surface may be used. .
Furthermore, in the above-described embodiment, the liquid crystal panel 441 is used as the light modulation device. However, a light modulation device other than liquid crystal, such as a device using a micromirror, may be used. In this case, polarizing plates on the light beam incident side and the light beam emission side can be omitted.

In the above-described embodiment, the projector 1 is exemplified as the image display device. However, the present invention is not limited thereto, and the control data is included and an image is formed according to image information input from the image information output device 10. Any other image display device may be used. Examples of such an image display device include a CRT (Cathode-Ray Tube) display, a liquid crystal display, and a plasma display.
In the embodiment, only the example of the front type projector that performs projection from the direction of observing the screen has been described. However, the present invention provides a rear type projector that performs projection from the side opposite to the direction of observing the screen. Is also applicable.

  The present invention can be suitably used for a projector, and is also suitably used for an image display device that is connected to an image information output device and forms an image according to image information input from the image information output device, such as a display. can do.

The figure which shows the connection aspect of the projector concerning one Embodiment of this invention. The figure which shows the structure of the optical unit in the said embodiment typically. The block diagram which shows the structure of the control board in the said embodiment. The figure which shows the processing flow of the update process of the control data in the said embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector (image display apparatus), 10 ... Image information output apparatus, 52 ... Flash memory (memory), 54 ... ROM (reference table memory | storage part), 55 ... Display control system (control means), 56 ... Main control system ( Control means), 57 ... image information input terminal, 10A ... DVD player, 10B ... personal computer, 441 (441R, 441G, 441B) ... liquid crystal panel (image forming means), 561 ... data determination unit, 562 ... data extraction unit, 563... Modulation function detection unit 564. Demodulation function generation unit 565... Data demodulation unit 566... Demodulation correctness determination unit 567... Data update unit 568.

Claims (5)

An image information input terminal to which the image information is input by connecting an image forming means for forming an image according to the input image information, a control means for controlling the apparatus main body including the image forming means, and an image information output device. An image display device comprising:
A rewritable memory storing control data for controlling the apparatus main body by the control means;
The control means includes
A data determination unit that determines whether or not the image data input from the image information input terminal includes update data for updating the control data;
When the data determination unit determines that the update data is included, the data extraction unit that extracts the update data;
Among the image information including the update data, a modulation function detection unit that detects the modulation function applied to the reference data using the image data of the header portion that does not include the update data as reference data;
A demodulation function generation unit that generates a demodulation function that is an inverse function of the detected modulation function;
A data demodulator that demodulates the generated demodulation function into update data that can be read by the control means over the update data;
An image display device comprising: a data updating unit that updates control data in the memory based on demodulated update data. The image display device according to claim 1,
A reference table storage unit that stores a reference table that associates a plurality of modulation functions with a demodulation function for each modulation function,
The image display device, wherein the demodulation function generation unit generates a demodulation function based on the reference table. The image display device according to claim 1 or 2,
The control means includes
Blank image formation command unit that causes the image forming unit to form a blank image other than an image based on input image information during execution of the modulation function detection unit, the demodulation function generation unit, the data demodulation unit, and the data update unit An image display device comprising: The image display device according to any one of claims 1 to 3,
The image information including the update data includes footer image data in a footer portion that does not include the update data.
The control means detects the footer image data by the data determination unit, extracts update data by the data extraction unit, detects a modulation function by the modulation function detection unit, and detects a demodulation function by the demodulation function generation unit And an end recognition unit for recognizing the end of update of the control data when the data demodulator demodulates the update data and the data update unit updates the control data. An image display device. The image display device according to any one of claims 1 to 4,
The image display apparatus according to claim 1, wherein the control means includes a demodulation correctness determination unit that determines whether or not the update data demodulated by the data demodulation unit has a demodulation error.

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