JP2012134601A - Image display device and method of controlling image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display device which can always adjust image quality accurately.SOLUTION: An image display device 100 comprises: an input image control part 170 which acquires an image signal; an image quality adjustment part 180 which adjusts the image quality of the image based on the image signal; an image output part 190 which displays the image based on the image signal; a sensor 121 which measures an illumination at the periphery of the own device and outputs a first illumination indicating the illumination; a receiving part 110 which receives information indicating the illumination measured by the sensor equipment with other device and outputs a second illumination indicating the illumination; and an MPU160 which selects the first illumination or the second illumination according to whether or not the first illumination and the second illumination are approximated to each other in a history, and controls the image quality adjustment part 180 based on the selected illumination.

Description

  The present invention relates to an image display device and a control method for the image display device.

  2. Description of the Related Art An image display device (projector) that measures ambient illuminance with an illumination sensor on the top surface of a housing and adjusts the intensity of light emitted from a light source and the image quality based on the measured illuminance is known. . When this image display device is used in a state where it is stored in a shelf or the like, external light incident on the illumination sensor is shielded, so that the illumination sensor cannot measure ambient illuminance.

  An image projection system in which a remote controller includes an illumination sensor is also known (see Patent Document 1). The remote controller transmits the illuminance measured by the illumination sensor included in the remote controller to the image display device. The image display device disclosed in Patent Document 1 is based on the illuminance received from the remote controller, even when external light incident on the image display device is blocked by the image display device being stored in a shelf or the like. The intensity (light emission amount) of light emitted from the light source can be adjusted.

JP 2008-244671 A

  By the way, since the image display device can be carried by the user, it is not always used in a state of being stored in a shelf or the like. If the image display device is not used in a place where outside light is shielded, the illumination sensor provided in the image display device may be able to measure the ambient illuminance more correctly than the illumination sensor provided in the remote controller. In such a case, the image display device is more accurate in terms of the light emission amount of the light source and the image quality of the image based on the illuminance measured by the illumination sensor included in the image display device than on the illuminance measured by the illumination sensor included in the remote controller. Adjust well.

  However, the image display device disclosed in Patent Document 1 adjusts the light emission amount of the light source based only on the illuminance measured by the illumination sensor included in the remote controller. For this reason, the image display device disclosed in Patent Document 1 may not be able to accurately adjust the light emission amount of the light source. Therefore, in such an image display device, when the image quality of the image is adjusted based only on the illuminance measured by the illuminance sensor included in the remote controller, it may not be able to be adjusted appropriately.

  The present invention has been made in view of the above points, and an object thereof is to provide an image display device and a control method for the image display device that can always adjust the light emission amount of the light source and the image quality of the image with high accuracy. To do.

The present invention has been made to solve the above problems, and includes an input image control unit that acquires an image signal, an image quality adjustment unit that adjusts the image quality of an image represented by the image signal, and the image quality adjustment unit. An image output unit for displaying an image based on the adjusted image signal, a first sensor that measures the illuminance around the device and outputs the first illuminance representing the illuminance, and another device are provided. A receiver that receives information representing the illuminance measured by the second sensor as second illuminance, a memory that stores the first illuminance and the second illuminance as a history, the first illuminance in the history, and the history in the history A control unit that selects the first illuminance or the second illuminance according to a result of comparison with the second illuminance, and controls the image quality adjustment unit based on the selected illuminance. Image display device .
The image display device selects the first illuminance measured by the sensor of its own device or the second illuminance measured by the sensor of the remote controller, and controls the image quality adjustment unit based on the selected illuminance. The image quality can always be adjusted accurately. Further, the image display apparatus can always adjust the image quality of an image with high accuracy without making the user aware of the situation even when one of the sensors does not function effectively.

Further, the present invention is characterized in that the control unit selects the second illuminance when a difference between the first illuminance in the history and the second illuminance in the history is smaller than a predetermined value. An image display device.
The image display device gives priority to the second illuminance measured by the sensor of the remote controller when both the sensor of its own device and the sensor of the remote controller can measure the surrounding illuminance, and the light emission amount of the light source based on the second illuminance Thus, the image quality of the image can always be adjusted with high accuracy.

Further, according to the present invention, the control unit is configured such that a difference between the first illuminance in the history and the second illuminance in the history is larger than a predetermined value, and a change in the first illuminance in the history is the history. In the image display device, the second illuminance is selected when the second illuminance is less than the change in the second illuminance.
The image display device controls the light emission amount of the light source based on the illuminance measured by the sensor of the remote controller when the sensor of its own device cannot measure the illuminance of the surroundings, so that the image quality of the image is always adjusted accurately. be able to.

Further, according to the present invention, the control unit is configured such that a difference between the first illuminance in the history and the second illuminance in the history is larger than a predetermined value, and a change in the second illuminance in the history is the history. In the image display apparatus, the first illuminance is selected when the first illuminance is less than the change in the first illuminance.
Since the image display device controls the light emission amount of the light source based on the illuminance measured by the sensor of its own device when the sensor of the remote controller cannot measure the ambient illuminance, this always adjusts the image quality of the image with high accuracy. be able to.

Further, according to the present invention, the control unit is configured such that a difference between the first illuminance in the history and the second illuminance in the history is larger than a predetermined value, and a change in the second illuminance in the history is predetermined. In the image display device, the first illuminance is selected when the value is larger than the value or when the change interval is smaller than a predetermined time interval.
The image display device controls the light emission amount of the light source based on the illuminance measured by the sensor of its own device when the ambient illuminance cannot be measured because the remote controller sensor faces the projection surface of the screen, etc. Thereby, the image quality of an image can always be adjusted accurately.

The present invention further includes a light source unit having a light source for displaying an image based on the image signal adjusted by the image quality adjustment unit, wherein the light source unit selects the first illuminance or the second selected by the control unit. An image display device that adjusts the light emission amount of the light source based on illuminance.
Since the image display device selects the illuminance measured by the sensor of its own device or the illuminance measured by the sensor of the remote controller, the light emission amount of the light source can always be accurately adjusted based on the selected illuminance. . Further, the image display apparatus can always adjust the light emission amount of the light source with high accuracy without making the user aware of the situation even when one of the sensors does not function effectively.

According to another aspect of the present invention, there is provided a control method for an image display apparatus, comprising: an image quality adjustment unit that adjusts an image quality of an input image; and an image output unit that displays an image based on an image signal adjusted by the image quality adjustment unit. The ambient light intensity is measured by the first sensor provided in the image display device, the first illumination intensity representing the illumination intensity is output, and the illumination intensity measured by the second sensor provided in the other apparatus is represented. Information is received as the second illuminance, the first illuminance and the second illuminance are stored as a history, and a difference between the first illuminance in the history and the second illuminance in the history is smaller than a predetermined value. Accordingly, the control method of the image display device is characterized in that the first illuminance or the second illuminance is selected and the image quality adjustment unit is controlled based on the selected illuminance.
Since the image display device selects the illuminance measured by the sensor of its own device or the illuminance measured by the sensor of the remote controller, the image quality can always be accurately adjusted based on the selected illuminance. Further, the image display apparatus can always adjust the image quality with high accuracy without making the user aware of the situation even when one of the sensors does not function effectively.

  According to the present invention, the image display device selects the illuminance measured by the sensor of the device itself or the illuminance measured by the sensor of the remote controller, and controls the light emission amount of the light source and the image quality based on the selected illuminance. Thus, the light emission amount of the light source and the image quality of the image can always be adjusted with high accuracy.

It is a block diagram showing the structure of the image display apparatus in one Embodiment of this invention. It is a figure showing arrangement | positioning of the sensor in one Embodiment of this invention, and arrangement | positioning of the operation button of an operation part. It is an illumination intensity ID corresponding | compatible table showing the correspondence of illumination intensity ID and illumination intensity range in one Embodiment of this invention. It is a figure showing the structure of the image output part in one Embodiment of this invention. It is a block diagram showing the structure of the remote controller in one Embodiment of this invention. It is a figure showing arrangement | positioning of the sensor in one Embodiment of this invention, and arrangement | positioning of the operation button of an operation part from the upper surface side of a remote controller. It is a figure showing the arrangement | positioning of the sensor in one Embodiment of this invention, and the arrangement | positioning of the operation button of an operation part from the top | upper surface side of a remote controller. It is a flowchart showing the operation | movement procedure of a remote controller when the auto color optimizer execution button is pressed in one Embodiment of this invention. It is a flowchart showing the operation | movement procedure of the remote controller which is performing the auto color optimizer function in one Embodiment of this invention. It is a flowchart showing the operation | movement procedure of the remote controller when the color mode button is pressed in one Embodiment of this invention. 6 is a flowchart illustrating an operation procedure of the image display apparatus when a press of an auto color optimizer execution button is notified according to an embodiment of the present invention. 6 is a flowchart illustrating an operation procedure of the image display apparatus when notification of pressing of a color mode button is given in an embodiment of the present invention. It is a flowchart showing the operation | movement procedure of an image display apparatus when illumination intensity ID is notified from the remote controller in one Embodiment of this invention. 6 is a flowchart illustrating an operation procedure of the image display device when an acquisition timer times out according to an embodiment of the present invention. It is a flowchart showing the procedure in which the image display apparatus which is performing the auto color optimizer function in one Embodiment of this invention selects the illumination intensity ID in a log | history. It is a figure showing the illumination intensity ID in the log | history in case an image display apparatus determines that the sensor of an image display apparatus cannot measure the surrounding illumination intensity in one Embodiment of this invention. It is a figure showing the 1st example of illumination intensity ID in a history in case an image display device judges that a sensor of a remote controller cannot measure peripheral illumination intensity in one embodiment of the present invention. It is a figure showing the 2nd example of illuminance ID in history when an image display device judges that a sensor of a remote controller cannot measure peripheral illuminance in one embodiment of the present invention. The figure which represents the example of illumination intensity ID in the log | history in case an image display apparatus determines that the sensor of an image display apparatus and the sensor of a remote controller are measuring the illumination intensity of each periphery in one Embodiment of this invention. is there.

  An embodiment of the present invention will be described in detail with reference to the drawings. An image display system according to an embodiment of the present invention includes an image display device (for example, a liquid crystal display device or a projector) and a remote controller (remote controller). The image display device performs a predetermined image quality adjustment on the input image signal, and projects an image based on the image signal after the image quality adjustment onto the screen by the light emitted from the light source. When projecting an image on the screen, the image display device accurately adjusts the light emission amount of the light source and the image quality of the image based on the illuminance measured by the sensor.

First, the configuration of the image display device will be described.
FIG. 1 is a block diagram showing the configuration of the image display apparatus. The image display apparatus 100 includes a receiving unit 110, an operation unit 120, a sensor 121, a RAM (Random Access Memory) 130, a ROM (Read Only Memory) 140, an NVRAM (Non Volatile RAM) 150, an MPU (Micro Microphone). A processing unit (microprocessor) 160, an input image control unit 170, an image quality adjustment unit 180, and an image output unit 190.

  The receiving unit 110 receives information representing the illuminance measured by the sensor (illuminance ID) from the remote controller using infrared rays, and outputs this information to the MPU 160. Here, the illuminance ID is identification information (ID) for identifying the illuminance range to which the illuminance measured by the sensor belongs. For example, the illuminance ID0 is assigned as the identification information to the illuminance range 0 to 19 [lux]. For example, the illuminance ID1 is assigned as identification information to the illuminance range 20 to 24 [lux].

  In addition, the receiving unit 110 receives button press information corresponding to an operation input to the remote controller from the remote controller using infrared rays, and outputs the received button press information to the MPU 160. For example, the receiving unit 110 receives information (key code) indicating that the auto color optimizer execution button (described later with reference to FIG. 7) is pressed by infrared rays from the remote controller, and receives this information. Output to the MPU 160. Further, the receiving unit 110 receives information (key code) indicating the color mode specified by pressing a color mode button (described later with reference to FIG. 7) from the remote controller by infrared, Information is output to the MPU 160.

  The operation unit 120 is a panel having operation buttons for a user to input an operation, and is provided on the top surface of the image display device 100. The operation unit 120 receives an operation input such as a button press, and outputs button press information corresponding to the operation input to the MPU 160. For example, the operation unit 120 receives an operation input for designating image quality adjustment parameters for adjusting the light emission amount of the light source and the image quality of the image (Visual setup). In addition, the operation unit 120 receives an operation input for designating a color mode (for example, a dynamic mode, a living mode, or a theater mode). In addition, the operation unit 120 receives an operation input for designating an image input system (Source) to which an image signal is input. In addition, the operation unit 120 receives an operation input for adjusting the volume (Volume) of the sound to be output. In addition, the operation unit 120 accepts an operation input for displaying an operation menu screen (Menu).

  The sensor 121 measures the illuminance around the image display device 100 (measurement range), and outputs information representing the measured illuminance to the MPU 160. FIG. 2 shows the arrangement of sensors and the arrangement of operation buttons on the operation unit. The sensor 121 is provided on the top surface of the image display apparatus 100. Accordingly, the sensor 121 can measure the illuminance around the image display device 100 due to external light (outside ambient light) incident on the top surface of the image display device 100. However, when the image display device 100 is used in a state of being stored in a shelf or the like, external light incident on the top surface of the image display device 100 may be blocked.

  Returning to FIG. 1, the description of the configuration of the image display apparatus will be continued. The NVRAM 150 is a non-volatile RAM and stores the value of the image quality adjustment parameter designated by the user through an operation input. The RAM 130 includes a work memory and a frame memory. Various data generated when the program is executed is stored in the work memory. The frame memory temporarily stores image frame data based on the image signal input to the input image control unit 170.

  The ROM 140 stores a program for operating the image display device 100. This program is expanded in the work memory of the RAM 130 when the image display apparatus 100 is activated. The ROM 140 stores the image quality adjustment parameter value in advance for each color tone mode. The image quality adjustment parameters for each color mode include, for example, the light emission amount (brightness) of the light source and the image quality (color mode, brightness, contrast, hue, color density, sharpness, color temperature, etc.).

  The ROM 140 stores a correspondence relationship between the illuminance ID and the illuminance range in advance. In FIG. 3, the correspondence relationship between the illuminance ID and the illuminance range is represented by an illuminance ID correspondence table. Hereinafter, as an example, the illuminance range 0 to 19 [lux] corresponds to the illuminance ID0. The illuminance ID1 corresponds to an illuminance range of 20 to 24 [lux]. The illuminance range 25 to 29 [lux] corresponds to the illuminance ID2. The illuminance ID3 corresponds to an illuminance range of 30 to 64 [lux]. The illuminance ID4 corresponds to an illuminance range of 65 to 80 [lux]. The illuminance ID5 corresponds to the illuminance range 81 to 96 [lux]. The illuminance ID6 corresponds to an illuminance range of 97 to 192 [lux]. The illuminance ID 7 corresponds to the illuminance range 193 to 240 [lux]. The illuminance ID 8 corresponds to the illuminance range 241 to 288 [lux]. The illuminance ID 9 corresponds to the illuminance range 289 to 480 [lux]. Also, the illuminance ID 10 corresponds to the illuminance range 481 to 600 [lux]. The illuminance ID 11 corresponds to the illuminance range 601 to 720 [lux]. The illuminance ID12 corresponds to the illuminance range 721 to the maximum measured value [lux].

  The illuminance ID0 is a definite range of the color tone mode 0. In other words, when the illuminance measured by the sensor is within the determination range of the color tone mode 0, the image display device 100 determines the light emission amount of the light source and the image quality of the image based on the value of the image quality adjustment parameter corresponding to the color tone mode 0. adjust. Similarly, the illuminance ID3 is a fixed range of the color tone mode 1. The illuminance ID 6 is a fixed range of the color tone mode 2. The illuminance ID 9 is a fixed range of the color tone mode 3. The illuminance ID 12 is a fixed range of the color tone mode 4. As described above, when the illuminance measured by the sensor is within the determined range, the color tone mode is switched to the color tone mode corresponding to the determined range.

  On the other hand, the illuminance ranges corresponding to the illuminance IDs 1, 2, 4, 5, 7, 8, 10 and 11 are hysteresis dead zones. When the illuminance measured by the sensor is in the hysteresis dead band, the color mode is not switched.

  Returning to FIG. 1, the description of the configuration of the image display apparatus will be continued. The MPU 160 receives, from the reception unit 110, button press information corresponding to an operation input to the remote controller and an illuminance ID based on the illuminance measured by a sensor included in the remote controller. In addition, the MPU 160 acquires information representing the illuminance measured by the sensor 121 from the sensor 121.

  Further, the MPU 160 executes an auto color optimizer function based on the button press information input from the receiving unit 110. Here, the auto color optimizer function is a function in which the image display device optimally selects a color tone mode according to the illuminance measured by the sensor, that is, the image display device determines the light emission amount of the light source and the image quality of the image. This is an optimal adjustment function. Further, the MPU 160 starts (turns on) or stops (turns off) an acquisition timer for acquiring information representing illuminance from the sensor 121 at a constant cycle (for example, a cycle of 100 [ms]).

  In addition, button pressing information corresponding to an operation input to the operation unit 120 is input from the operation unit 120 to the MPU 160. The MPU 160 acquires image signals from a plurality of image input systems (for example, video (Video), DVD / USB (Digital Versatile Disc / Universal Serial Bus)) included in the input image control unit 170 based on the button press information. Select the image input system.

  The MPU 160 accesses the NVRAM 150, acquires the value of the image quality adjustment parameter designated by the user, and outputs it to the image quality adjustment unit 180. In addition, the MPU 160 acquires the value of the image quality adjustment parameter of the color tone mode corresponding to the color mode represented by the button press information from the reception unit 110 or the operation unit 120 from the ROM 140 and outputs it to the image quality adjustment unit 180.

  Here, the color mode “DVD / USB” corresponds to, for example, the color tone mode 2. The color mode “video” corresponds to, for example, the color tone mode 3.

  The MPU 160 stores the illuminance ID input from the receiving unit 110 in the work memory of the RAM 130 as the illuminance ID history from the remote controller. On the other hand, the MPU 160 obtains the illuminance ID corresponding to the illuminance range to which the illuminance measured by the sensor 121 belongs based on the information indicating the illuminance and the correspondence (see FIG. 3), and the obtained illuminance ID is obtained from the image display device 100. Is stored in the work memory of the RAM 130.

  The MPU 160 determines whether or not the illuminance ID of the image display device 100 in the history is approximate to the illuminance ID from the remote controller in the history. In response to this determination, the MPU 160 selects the illuminance ID of the image display device 100 in the history or the illuminance ID from the remote controller in the history.

  Since the image display device 100 selects the first illuminance measured by the sensor of its own device or the second illuminance measured by the sensor of the remote controller, and controls the light emission amount of the light source and the image quality based on the selected illuminance. Thus, the light emission amount of the light source and the image quality of the image can always be adjusted with high accuracy. Further, the image display apparatus 100 can always adjust the light emission amount of the light source and the image quality of the image with high accuracy without making the user aware of the situation even when one of the sensors does not function effectively.

  More specifically, when the illuminance ID of the image display device 100 in the history and the illuminance ID from the remote controller in the history are not approximate, the MPU 160 selects the illuminance ID in the history as follows.

  When the change in the illuminance ID of the image display device 100 in the history is smaller than the change in the illuminance ID of the remote controller in the history (described later with reference to FIG. 16), the MPU 160 causes the sensor 121 of the image display device 100 to Is not measured correctly, and the illuminance ID from the remote controller in the history is selected. Here, whether or not the change of the illuminance ID in the history is small may be determined based on, for example, a comparison of time intervals (frequency) from the previous change of the illuminance ID to the current change. Further, whether or not the change in the illuminance ID in the history is small may be determined based on, for example, a comparison of the amount of change in the illuminance ID.

  The image display device 100 controls the light emission amount of the light source and the image quality of the image based on the illuminance measured by the sensor of the remote controller when the sensor 121 of the own device cannot measure the illuminance of the surroundings. The quantity and the image quality of the image can always be adjusted accurately.

  When the change in illuminance ID from the remote controller in the history is smaller than the change in illuminance ID of the image display device 100 in the history (described later with reference to FIG. 17), Is not measured correctly, and the illuminance ID of the image display device 100 in the history is selected.

  When the sensor of the remote controller cannot measure the ambient illuminance, the image display apparatus 100 controls the light emission amount of the light source and the image quality of the image based on the illuminance measured by the sensor 121 of the own apparatus. The quantity and the image quality of the image can always be adjusted accurately.

  In addition, the MPU 160 may change the remote controller when the change in the illuminance ID from the remote controller in the history is greater than a predetermined threshold or more frequent than a predetermined time interval (described later with reference to FIG. 18). It is determined that the surrounding illuminance cannot be measured correctly because the sensor is directed to the projection surface of the screen, and the illuminance ID of the image display device 100 in the history is selected.

  The image display apparatus 100, when the sensor of the remote controller cannot measure the illuminance of the surroundings because the sensor is facing the projection surface of the screen or the like, the light emission amount of the light source and the image of the image based on the illuminance measured by the sensor 121 of the own apparatus. Since the image quality is controlled, the light emission amount of the light source and the image quality of the image can always be adjusted with high accuracy.

  On the other hand, when the illuminance ID of the image display device 100 in the history and the illuminance ID from the remote controller in the history are approximate (described later with reference to FIG. 19), the MPU 160 has the sensor 121 of the image display device 100, and The remote controller sensor determines that the illuminance around each of the sensors can be measured correctly, and preferentially selects the illuminance ID from the remote controller in the history.

  When both the sensor 121 of the device itself and the sensor of the remote controller can measure the illuminance of the surroundings, the image display device gives priority to the second illuminance measured by the sensor of the remote controller, and the light source emits light based on the second illuminance. Since the amount and the image quality of the image are controlled, the light emission amount of the light source and the image quality of the image can always be adjusted with high accuracy.

  The MPU 160 acquires the value of the image quality adjustment parameter of the color tone mode corresponding to the selected illuminance ID in the history from the ROM 140 and outputs it to the image quality adjustment unit 180 and the image output unit 190. The MPU 160 controls the amount of light emitted from a light source (described later with reference to FIG. 4) of the image output unit 190 based on an image quality adjustment parameter based on the selected illuminance ID in the history. In addition, the MPU 160 causes the image quality adjustment unit 180 to perform predetermined image quality adjustment based on the value of the image quality adjustment parameter based on the selected illuminance ID in the history.

  The input image control unit 170 has a plurality of image input systems. The input image control unit 170 acquires an image signal from the image input system selected by the MPU 160 and outputs the acquired image signal to the image quality adjustment unit 180.

  The image quality adjustment unit 180 receives the image quality adjustment parameter corresponding to the color tone mode and the value of the image quality adjustment parameter designated by the user from the MPU 160. In addition, an image signal is input from the input image control unit 170 to the image quality adjustment unit 180. The image quality adjustment unit 180 performs predetermined image quality adjustment on the image signal based on the value of each image quality adjustment parameter, and outputs the image signal after the image quality adjustment to the image output unit 190.

  Since the image display device 100 selects the illuminance measured by the sensor 121 of the device itself or the illuminance measured by the sensor of the remote controller, the image quality can always be accurately adjusted based on the selected illuminance. Further, the image display apparatus 100 can always adjust the image quality with high accuracy without making the user aware of the situation even when one of the sensors does not function effectively.

  An image signal after image quality adjustment is input from the image quality adjustment unit 180 to the image output unit 190. The image signal output device 140 projects an image corresponding to the input image signal onto the screen. FIG. 4 is a block diagram illustrating a configuration example of the image output unit. The image output unit 190 includes the illumination unit 10 and the image projection unit 50. The illumination unit 10 includes a light source unit 11, a first fly eye lens 12, and a second fly eye lens 13. The light source unit 11 includes a light source 14 and a reflector 15.

  The light source 14 independently emits red light LR, blue light LB, and green light LG. The reflector 15 reflects the light emitted from the light source 14. The fly-eye lenses 12 and 13 have a plurality of lenses 16 and 17, and make the illuminance distribution of the light emitted from the light source 14 uniform in the image projection unit 50.

 The image projection unit 50 includes a color separation / synthesis unit 20 and a projection optical system 40. The color separation / combination unit 20 includes dichroic mirrors 21 and 22, reflection mirrors 23 to 25, relay lenses 26 to 28, transmissive liquid crystal light valves 30 to 32, and a cross dichroic prism 33.

  The light emitted from the light source 14 enters the color separation / synthesis unit 20. Here, the light emitted from the light source 14 has the illuminance distribution made uniform by the fly-eye lenses 12 and 13 in the transmissive liquid crystal light valves (light modulation elements) 30 to 32 of the color separation / synthesis unit 20.

  The dichroic mirrors 21 and 22 selectively reflect predetermined color light and transmit light of other wavelengths. For example, the dichroic mirrors 21 and 22 may be manufactured by laminating a dielectric multilayer film on the glass surface.

  The dichroic mirror 21 transmits the red light LR out of the light emitted from the light source 14 and reflects the blue light LB and the green light LG. The dichroic mirror 22 transmits the blue light LB reflected by the dichroic mirror 21 and reflects the green light LG.

  In this way, the red light LR emitted from the light source 14 passes through the dichroic mirror 21, is reflected by the reflection mirror 25, and enters the red light transmission type liquid crystal light valve 30. Also. The green light LG emitted from the light source 14 is reflected by the dichroic mirror 22 and enters the transmissive liquid crystal light valve 31 for green light. The blue light LB emitted from the light source 14 passes through the dichroic mirror 22 and passes through a relay system 29 including a relay lens 26, a reflection mirror 23, a relay lens 27, a reflection mirror 24, and a relay lens 28. , Is incident on the transmissive liquid crystal light valve 32 for blue light.

  The transmissive liquid crystal light valves 30 to 32 are light modulation elements. The red light LR modulated by the transmissive liquid crystal light valve 30 enters the cross dichroic prism 33. Further, the green light LG modulated by the transmissive liquid crystal light valve 31 enters the cross dichroic prism 33 from a direction different from that of the red light LR. Further, the blue light LB modulated by the transmissive liquid crystal light valve 32 enters the cross dichroic prism 33 from a different direction from the red light LR and the green light LG.

  The cross dichroic prism 33 has a structure in which right-angle prisms are bonded together. On the inner surface of the structure, a mirror surface that reflects the red light LR and a mirror surface that reflects the blue light LB are formed in a cross shape. Yes. The red light LR, the green light LG, and the blue light LB are combined by these mirror surfaces, and the combined light forms an image.

  The projection optical system 40 has a projection lens 48. The image formed by the cross dichroic prism 33 is enlarged and projected onto the screen 9 by the projection lens 48. In this way, the image projection unit 50 projects an image on the screen 9 using the light emission of the light source 14.

Next, the configuration of the remote controller will be described.
FIG. 5 is a block diagram showing the configuration of the remote controller. The remote controller 200 includes a sensor 210, an operation unit 220, a RAM 230, a ROM 240, an MPU 250, and an information transmission unit 260.

  The sensor 210 measures the illuminance around the remote controller 200 (measurement range), and outputs information representing the measured illuminance to the MPU 250. In FIG. 6, the arrangement of the sensors and the arrangement of the operation buttons of the operation unit are shown from the upper surface side of the remote controller. The sensor 210 is provided on the top surface of the remote controller 200. Thereby, the sensor 121 can measure the illuminance around the remote controller 200 due to external light (ambient external light) incident on the top surface of the remote controller 200.

  Returning to FIG. 5, the description of the configuration of the remote controller will be continued. The operation unit 220 has operation buttons on the top surface of the remote controller 200 for the user to input operations. The operation unit 220 receives an operation input such as a button press, and outputs button press information corresponding to the operation input to the MPU 250.

  In FIG. 7, the arrangement of sensors and the arrangement of operation buttons on the operation unit are shown from the top side of the remote controller. As shown in FIG. 7, the sensor 210 is disposed on the top surface of the remote controller 220 at a position that is not covered by the user's hand.

  The operation unit 220 receives an operation input such as a button press, and outputs button press information corresponding to the operation input to the MPU 250. For example, the operation unit 220 receives an operation input for designating a color mode when the color mode button 222 is pressed. Further, for example, the operation unit 220 receives an operation input for executing the auto color optimizer function when the auto color optimizer execution button 221 is pressed.

  The auto color optimizer execution button 221 is turned on or off according to control by the MPU 250. Specifically, in order to indicate that the auto color optimizer function is being executed (the color mode is “auto”), the auto color optimizer execution button 221 is controlled according to control by the MPU 250. Lights up. On the other hand, in order to indicate that the auto color optimizer function is not being executed (stopped), the auto color optimizer execution button 221 is turned off in accordance with control by the MPU 250.

  Returning to FIG. 5, the description of the configuration of the remote controller will be continued. The RAM 230 includes a work memory. Various data generated when the program is executed is stored in the work memory. The ROM 240 stores a program for operating the remote controller 200. This program is expanded in the work memory of the RAM 230 when the remote controller 200 is activated. In addition, the ROM 140 stores in advance an illuminance ID correspondence table that represents the correspondence between the illuminance ID and the illuminance range. This illuminance ID correspondence table is the same as the illuminance ID correspondence table (see FIG. 3) stored in the ROM 140 (see FIG. 1) of the image display device 100.

  The MPU 250 receives button press information corresponding to an operation input to the remote controller 200 from the operation unit 220. Further, the MPU 250 determines whether or not the auto color optimizer execution button 221 is turned off or turned on. In addition, the MPU 250 outputs button press information to the information transmission unit 260. In addition, the MPU 250 acquires information indicating illuminance from the sensor 210 at a constant cycle (for example, 100 [ms] cycle), and notifies the image display device 100 of the illuminance ID corresponding to the acquired information indicating illuminance. The timer is started (on) or stopped (off).

  In addition, information indicating the illuminance measured by the sensor 210 is input from the sensor 210 to the MPU 250. The MPU 250 obtains the illuminance ID corresponding to the illuminance range to which the illuminance measured by the sensor 210 belongs based on the information representing the illuminance and the correspondence relationship (see FIG. 3), and outputs the obtained illuminance ID to the information transmission unit 260. To do. The MPU 250 may store the obtained illuminance ID in the work memory of the RAM 230 as the illuminance ID of the remote controller 200 in the history.

  The information transmission unit 260 receives button press information (key code) and illuminance ID from the MPU 160. The button press information includes, for example, information indicating that the auto color optimizer execution button 221 is pressed and information indicating the color mode. The information transmission unit 260 converts the button press information and the illuminance ID into infrared rays and transmits the infrared rays to the image display device 100 (see FIG. 1).

Next, operation procedures of the image display device and the remote controller will be described.
FIG. 8 is a flowchart showing an operation procedure of the remote controller when the auto color optimizer execution button is pressed. When the auto color optimizer execution button is pressed, the MPU 250 (see FIG. 5) of the remote controller 200 determines whether or not the auto color optimizer execution button is turned off (step S1).

  When the auto color optimizer execution button is off (step S1-Yes), the MPU 250 notifies the image display device that the auto color optimizer execution button has been pressed (step S2). Then, the MPU 250 lights up the auto color optimizer execution button (step S3). Further, the MPU 250 turns on the notification timer (step S4). As a result, the auto color optimizer function in the remote controller 200 is being executed.

  In addition, the MPU 250 acquires information representing illuminance corresponding to ambient ambient light from the sensor 210 included in the remote controller 200, and obtains an illuminance ID corresponding to the acquired information (step S5). Then, the MPU 250 notifies the image display device 100 of the obtained illuminance ID (step S6).

  On the other hand, if the illumination of the auto color optimizer execution button is turned on in step S1 (step S1-No), the MPU 250 turns off the auto color optimizer execution button (step S7). Then, the MPU 250 turns off the notification timer (step S8). As a result, the auto color optimizer function in the remote controller 200 is stopped.

  FIG. 9 is a flowchart showing the operation procedure of the remote controller that is executing the auto color optimizer function. When the notification timer times out during execution of the auto color optimizer function, the MPU 250 of the remote controller 200 acquires information indicating the illuminance from the sensor 210 provided in the remote controller 200, and sets the illuminance ID corresponding to the acquired information. Obtained (step Sa1). Then, the MPU 250 notifies the image display device 100 of the obtained illuminance ID (step Sa2).

  FIG. 10 is a flowchart showing the operation procedure of the remote controller when the color mode button is pressed. When the color mode button is pressed, the MPU 250 of the remote controller 200 notifies the image display device 100 that the color mode button has been pressed (step Sb1). Then, the MPU 250 determines whether or not the auto color optimizer execution button is lit (step Sb2).

  When the auto color optimizer execution button is lit (step Sb2-Yes), the MPU 250 turns off the auto color optimizer execution button (step Sb3). Then, the MPU 250 turns off the notification timer (step Sb4). On the other hand, if the auto color optimizer execution button is turned off in step Sb2 (step Sb2-No), the MPU 250 ends the process when the color mode button is pressed.

  FIG. 11 is a flowchart showing an operation procedure of the image display apparatus when the pressing of the auto color optimizer execution button is notified. When notified of pressing of the auto color optimizer execution button, the MPU 160 (see FIG. 1) of the image display device 100 determines whether or not the auto color optimizer function in the image display device 100 is stopped. Is determined (step Sc1).

  When the auto color optimizer function in the image display apparatus 100 is stopped (step Sc1-Yes), the MPU 160 turns on the acquisition timer (step Sc2). As a result, the auto color optimizer function in the image display apparatus 100 is being executed. Further, the MPU 160 initializes (clears) the illuminance ID in the history stored in the work memory of the RAM 130 (see FIG. 1) (step Sc3). On the other hand, when the auto color optimizer function in the image display apparatus 100 is being executed in step Sc1 (step Sc1-No), the MPU 160 turns off the acquisition timer (step Sc4). As a result, the auto color optimizer function in the image display apparatus 100 is stopped.

  FIG. 12 is a flowchart showing an operation procedure of the image display apparatus when the color mode button is notified to be pressed. When notified of pressing of the color mode button, the MPU 160 of the image display apparatus 100 determines whether or not the auto color optimizer function in the image display apparatus 100 is being executed (step Sd1). When the auto color optimizer function in the image display apparatus 100 is being executed (step Sd1-Yes), the MPU 160 turns off the acquisition timer (step Sd2). As a result, the auto color optimizer function in the image display apparatus 100 is stopped.

  Further, the MPU 160 causes the image quality adjustment unit 180 (see FIG. 1) to adjust the image quality based on the value of the image quality adjustment parameter of the color tone mode corresponding to the color mode specified by the key code received from the remote controller 200. Further, the MPU 160 causes the image output unit 190 (see FIG. 1) to output the amount of light emitted from the light source based on the value of the image quality adjustment parameter of the color tone mode corresponding to the color mode specified by the key code received from the remote controller 200. The image quality is adjusted (step Sd3). On the other hand, in step Sd1, when the auto color optimizer function in the image display apparatus 100 is not being executed (stopped) (step Sd1-No), the MPU 160 advances the process to step Sd3.

  FIG. 13 is a flowchart showing an operation procedure of the image display apparatus when the illuminance ID is notified from the remote controller. When the illuminance ID is notified from the remote controller 200 during execution of the auto color optimizer function, the MPU 160 of the image display apparatus 100 notifies that the specified time has passed since the previous notification. Is determined (step Se1). When the current notification is a notification that the specified time has passed since the previous notification (step Se1-Yes), the MPU 160 sets the illuminance ID in the history stored in the work memory of the RAM 130 (see FIG. 1). Initialization (clearing) is performed (step Se2).

  Then, the MPU 160 stores the illuminance ID notified from the remote controller 200 in the work memory of the RAM 130 as the illuminance ID from the remote controller 200 in the history (step Se3). Further, the MPU 160 executes the auto color optimizer function based on the illuminance ID in the history stored in the work memory of the RAM 130 (step Se4). Here, among the illuminance IDs in the history stored in the RAM 130, which of the illuminance ID from the remote controller 200 in the history and the illuminance ID of the image display device 100 in the history is selected is shown in FIG. Will be described later.

  On the other hand, when the current notification is not a notification in which the specified time or more has passed since the previous notification in step Se1 (step Se1-No), the MPU 160 advances the process to step Se3.

  FIG. 14 is a flowchart illustrating an operation procedure of the image display apparatus when the acquisition timer times out. When the acquisition timer times out during execution of the auto color optimizer function, the MPU 160 acquires information indicating illuminance from the sensor 121 included in the image display device 100, and obtains an illuminance ID corresponding to the acquired information ( Step Sf1).

  Then, the MPU 160 stores the obtained illuminance ID in the work memory of the RAM 130 as the illuminance ID of the image display device 100 in the history (step Sf2). Further, the MPU 160 executes the auto color optimizer function based on the illuminance ID in the history stored in the work memory of the RAM 130 (step Sf3). Here, among the illuminance IDs in the history stored in the RAM 130, the illuminance ID from the remote controller 200 in the history and the illuminance ID of the image display device 100 in the history are selected as follows.

  FIG. 15 is a flowchart illustrating a procedure in which the image display device that is executing the auto color optimizer function selects an illuminance ID in the history. During execution of the auto color optimizer function, the MPU 160 (see FIG. 1) of the image display apparatus 100 accesses the work memory of the RAM 130 and refers to the illuminance ID from the remote controller 200 in the history (step Sg1). . Then, the MPU 160 determines whether or not the illuminance ID notified from the remote controller 200 is greater than or equal to the specified number in the illuminance ID in the history (step Sg2).

  When the illuminance ID notified from the remote controller 200 is greater than the prescribed number in the illuminance ID in the history (step Sg2-Yes), the MPU 160 accesses the work memory in the RAM 130 and sets the illuminance ID of the image display device 100 in the history. Reference (step Sg3). Further, the MPU 160 determines whether or not the change in the illuminance ID of the image display apparatus 100 in the history and the change in the illuminance ID from the remote controller 200 in the history are approximate (step Sg4).

  When the change in the illuminance ID of the image display device 100 in the history and the change in the illuminance ID from the remote controller 200 in the history are approximate (step Sg4-Yes), the MPU 160 determines the illuminance from the remote controller 200 in the history. The ID is selected and used as information for determining the color tone mode (step Sg5). The MPU 160 determines the color tone mode based on the selected illuminance ID in the history. The MPU 160 outputs the image quality adjustment parameter of the determined tone mode to the image quality adjustment unit 180 and the image output unit 190 (step Sg6).

  On the other hand, when the change in illuminance ID of the image display device 100 in the history and the change in illuminance ID from the remote controller 200 in the history are not approximate in step Sg4 (step Sg4-No), the MPU 160 A change tendency between the illuminance ID of the image display device 100 and the illuminance ID from the remote controller 200 in the history is determined (step Sg7). When the change in the illuminance ID of the image display apparatus 100 in the history is small, the MPU 160 advances the process to step Sg5.

  When the change in the illuminance ID from the remote controller 200 in the history is smaller than the change in the illuminance ID of the image display device 100 in the history, the MPU 160 selects the illuminance ID of the image display device 100 in the history and sets the color tone mode. Use as information for decision. Also, when the change in the illuminance ID from the remote controller 200 in the history is larger than the predetermined threshold or more frequent than the predetermined time interval, the MPU 160 also displays the illuminance ID of the image display device 100 in the history. Is used as information for determining the color tone mode (step Sg8).

  In step Sg2, when the illuminance ID notified from the remote controller 200 does not exist in the history in the illuminance ID more than the specified number (step Sg2-No), the MPU 160 advances the process to step Sg8.

Next, the illuminance ID in the history will be described.
FIG. 16 is a diagram illustrating the illuminance ID in the history when the image display apparatus determines that the sensor of the image display apparatus cannot measure the illuminance around. When comparing the amount of change in the illuminance ID and the frequency of the change, in the example shown in FIG. 16, the change in the illuminance ID in the history of the image display device 100 is smaller than the change in the illuminance ID of the remote controller 200 in the history. In this case, the MPU 160 determines that the sensor 121 (see FIG. 1) of the image display device 100 cannot correctly measure the ambient illuminance.

  FIG. 17 is a diagram illustrating a first example of the illuminance ID in the history when the image display apparatus determines that the ambient illuminance cannot be measured by the sensor of the remote controller. When comparing the amount of change in the illuminance ID and the frequency of the change, in the example shown in FIG. 17, the change in the illuminance ID from the remote controller 200 in the history is less than the change in the illuminance ID of the image display device 100 in the history. In this case, the MPU 160 determines that the sensor 210 (see FIG. 5) of the remote controller 200 has not correctly measured the ambient illuminance.

  FIG. 18 is a diagram illustrating a second example of the illuminance ID in the history when the image display apparatus determines that the sensor of the remote controller cannot measure the illuminance around. In the example shown in FIG. 18, the illuminance ID from the remote controller 200 in the history changes by the value 7 from the illuminance ID2 to the illuminance ID9. When comparing the amount of change in illuminance ID, the change in illuminance ID from the remote controller 200 in the history is greater than a predetermined threshold (for example, threshold 3). In this case, the MPU 160 determines that the ambient illuminance cannot be measured correctly because the sensor 210 of the remote controller 200 faces the projection surface of the screen 9 (see FIG. 4).

  FIG. 19 is a diagram illustrating the illuminance ID in the history when the image display device determines that the sensor of the image display device and the sensor of the remote controller can measure the illuminance around each of them. When comparing the amount of change in the illuminance ID and the frequency of the change, in the example shown in FIG. 19, the illuminance ID of the image display device 100 in the history and the illuminance ID from the remote controller 200 in the history are approximated (linked). Yes. In this case, the MPU 160 determines that the sensor 121 of the image display device 100 and the sensor 210 of the remote controller 200 have correctly measured the illuminance around each of them.

  As described above, the image display apparatus 100 includes the input image control unit 170 that acquires the image signal, the image quality adjustment unit 180 that adjusts the image quality of the image represented by the image signal, and the image signal that is adjusted by the image quality adjustment unit 180. The image output unit 190 for displaying an image based on the above, the sensor 121 that measures the illuminance around the device itself, outputs the first illuminance representing the illuminance, and the sensor 210 provided in another device measured. A receiving unit 110 that receives information (illuminance ID) representing illuminance as second illuminance, a RAM 130 that stores the first illuminance and the second illuminance as history, the first illuminance in the history, and the first illuminance in the history. An MPU 160 that selects the first illuminance or the second illuminance according to the result of comparing the two illuminances and controls the image quality adjustment unit 180 based on the selected illuminance.

  Since the image display device selects the first illuminance measured by the sensor of its own device or the second illuminance measured by the sensor of the remote controller, and controls the light emission amount of the light source and the image quality based on the selected illuminance, Thereby, the light emission amount of the light source and the image quality of the image can always be adjusted with high accuracy. Further, the image display apparatus can always adjust the light emission amount of the light source and the image quality of the image with high accuracy without making the user aware of the situation even when one of the sensors does not function effectively.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.
For example, in the above embodiment, the light emission amount of the light source and the image quality of the image are adjusted according to the measured illuminance. However, the present invention is not limited thereto, and only the light emission amount of the light source may be adjusted, or only the image quality of the image is adjusted. May be.

  Moreover, although the image projection part 50 mentioned above was a type which projects an image on a screen using the transmissive | pervious liquid crystal light valve 30-32, the type which projects using a reflective liquid crystal light valve may be sufficient. The DMD method using a digital mirror device may be used. Further, the present invention is not limited to the 3LCD method for projecting a color image by the three transmission type liquid crystal light valves 30 to 32, and a method for projecting a color image by time-division displaying an image corresponding to RGB using one liquid crystal light valve, The present invention can be applied to both a single plate DMD system having a color wheel and a 3DMD system.

  Further, the communication method executed by the remote controller 200 may not be limited to that using infrared rays.

  For example, the remote controller 200 receives the illuminance ID in the history of the image display device 100 from the image display device 100, and selects the illuminance ID of the image display device 100 in the history or the illuminance ID of the remote controller 200 in the history. The light emission amount of the light source provided in the image display device 100 and the image quality of the image may be controlled by notifying the image display device 100 of the selected illuminance.

  Further, for example, when both the sensor included in the remote controller 200 and the sensor included in the image display device 100 do not function effectively, the image display device 100 may temporarily stop the execution of the auto color optimizer function.

  Note that a program for realizing the image display device described above may be recorded on a computer-readable recording medium, and the program may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, “computer-readable recording medium” means a volatile memory (RAM) inside a computer system that becomes a server or client when a program is transmitted via a network such as the Internet or a communication line such as a telephone line. In addition, those holding programs for a certain period of time are also included. The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line. The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 9 ... Screen, 10 ... Illumination part, 11 ... Light source part, 12 ... 1st fly eye lens, 13 ... 2nd fly eye lens, 14 ... Light source, 15 ... Reflector, 16, 17 ... Lens, 20 ... Color separation / synthesis part 21, 22 ... Dichroic mirror, 23, 24, 25 ... Reflection mirror, 26, 27, 28 ... Relay lens, 29 ... Relay system, 30 ... Red light transmission type liquid crystal light valve (light modulation element), 31 ... Green Light transmission liquid crystal light valve (light modulation element), 32 ... Blue light transmission liquid crystal light valve (light modulation element), 33 ... Cross dichroic prism, 40 ... Projection optical system, 48 ... Projection lens, 50 ... Image projection , 100 ... Image display device (projector), 110 ... Receiving part, 120 ... Operation part, 121 ... Sensor, 130 ... RAM, 140 ... ROM, 150 ... NVR M, 160 ... MPU, 170 ... input image control unit, 180 ... image quality adjustment unit, 190 ... image output unit, 200 ... remote controller, 210 ... sensor, 220 ... operation unit, 221 ... auto color optimizer execution button, 222 ... Color mode button, 230 ... RAM, 240 ... ROM, 250 ... MPU, 260 ... Information transmitter

Claims (7)

An input image control unit for acquiring an image signal;
An image quality adjustment unit for adjusting the image quality of the image represented by the image signal;
An image output unit for displaying an image based on the image signal adjusted by the image quality adjustment unit;
A first sensor that measures the illuminance around the device and outputs a first illuminance representing the illuminance;
A receiving unit that receives, as the second illuminance, information indicating the illuminance measured by a second sensor provided in another device;
A memory for storing the first illuminance and the second illuminance as a history;
Depending on the result of comparing the first illuminance in the history and the second illuminance in the history, the first illuminance or the second illuminance is selected, and the image quality adjusting unit is selected based on the selected illuminance. A control unit to control;
An image display device comprising:   2. The control unit according to claim 1, wherein the control unit selects the second illuminance when a difference between the first illuminance in the history and the second illuminance in the history is smaller than a predetermined value. Image display device.   The control unit is configured such that a difference between the first illuminance in the history and the second illuminance in the history is greater than a predetermined value, and a change in the first illuminance in the history is the second illuminance in the history. The image display apparatus according to claim 1, wherein the second illuminance is selected when the change is smaller than the change.   The control unit is configured such that a difference between the first illuminance in the history and the second illuminance in the history is larger than a predetermined value, and a change in the second illuminance in the history is the first illuminance in the history. The image display apparatus according to claim 1, wherein the first illuminance is selected when the change is smaller than the change.   The control unit is configured such that a difference between the first illuminance in the history and the second illuminance in the history is larger than a predetermined value, and a change in the second illuminance in the history is larger than a predetermined value. 5. The image display device according to claim 1, wherein the first illuminance is selected when the interval is smaller than a predetermined time interval. 6. A light source unit having a light source for displaying an image based on the image signal adjusted by the image quality adjustment unit;
The said light source part adjusts the light emission amount of the said light source based on the said 1st illumination intensity or the said 2nd illumination intensity which the said control part selected, The any one of Claims 1-5 characterized by the above-mentioned. The image display device described. An image display apparatus comprising: an image quality adjustment unit that adjusts an image quality of an input image; and an image output unit that displays an image based on an image signal adjusted by the image quality adjustment unit,
Measure ambient illuminance by a first sensor provided in the image display device, and output a first illuminance representing the illuminance,
Receiving information indicating the illuminance measured by the second sensor provided in another device as the second illuminance;
Storing the first illuminance and the second illuminance as a history;
Based on whether the difference between the first illuminance in the history and the second illuminance in the history is smaller than a predetermined value, the first illuminance or the second illuminance is selected. And controlling the image quality adjustment unit.

Images