JP5814534B2 - Image display apparatus and control method thereof - Google Patents

Description

  The present invention relates to a liquid crystal display device and a control method thereof.

In recent years, liquid crystal display devices corresponding to color management used in printing and design work have become larger. These large-screen liquid crystal display devices connect two personal computers (PCs), divide the screen into two and display two images sent from both PCs, or are sent from either PC You can switch whether to display the image on the entire screen. In addition, liquid crystal display devices use RGB light emitting diodes (RGB LEDs) as the backlight light source instead of the conventional cold cathode ray tube (Cold Cathode Fluorescent Lamp: CCFL). ) Exist. RGB LED as backlight
By using the color reproducibility can be improved as compared with the conventional CCFL.

In the case of a liquid crystal display device that uses RGB LED as the backlight, when the user calibrates by specifying the target brightness, color temperature, etc., the backlight RGB LED (RGB LED backlight) based on the specified target value The flash setting is changed. When two PCs are connected to the liquid crystal display device, desired color reproducibility can be obtained for an image output from each PC by performing calibration using each PC.

Conventionally, there is a technique of dividing a screen into a plurality of light source blocks and controlling the light emission setting of the RGB LED backlight for each light source block in accordance with an input image signal to improve color reproducibility (for example, Patent Document 1). reference).
Also, based on the image quality information and the input / output characteristics of the image display unit, the image signal output device that prioritizes image quality is determined and image quality adjustment is performed, and the image output by the other image signal output device is prioritized for image quality There is a technique for adjusting the image quality to be the same quality as the above (see, for example, Patent Document 2).

JP 2007-322944 A JP 2004-295133 A

However, in the conventional technique, when different backlight emission settings are set for each PC (image signal output device), images from each PC are displayed side by side in the horizontal direction of the screen (two-screen display). As a result, the color reproducibility decreases near the boundary of the image.
Therefore, there is a possibility that the user edits the image without noticing that the color reproducibility is deteriorated and adjusts the wrong color.

  In view of the above, an object of the present invention is to provide a technique capable of suppressing a user from performing wrong color adjustment when images from a plurality of image signal output devices are displayed side by side on one screen. .

In a first aspect of the present invention, when a plurality of image signals output from a plurality of image signal output devices are input and a plurality of images based on the plurality of image signals are displayed side by side on one screen, An image display device that emits a backlight with a light emission setting set for an image signal output device that outputs an image signal of the image for each image, and detects an image signal output device operated by a user When a detection means and an image signal output device operated by the user are detected by the detection means, a display area of a detection image which is an image based on the image signal output from the detected image signal output device backlight, and the backlight of the boundary portion between the plurality of display areas of the display area and the detection image of the adjacent images is an image that is displayed adjacent to the detected image of the image, said analyzing of Is a control means for emitting at set emission set to the image signal output apparatus, have a, said control means includes a flash setting set for the detected image signal output device, the adjacent The image display device is characterized in that the size of the boundary portion is determined in accordance with a light emission setting set for an image signal output device that outputs an image .
In the second aspect of the present invention, when a plurality of images generated by a plurality of applications are displayed side by side on a single screen, the light emission setting set for the application that generates the images is performed for each image. An image display device that emits a backlight, the detection unit detecting an application operated by a user, and the detected application when the detection unit detects an application operated by the user A backlight of a display area of a detection image that is an image generated by the image processing apparatus , a display area of an adjacent image that is an image displayed adjacent to the detection image among the plurality of images , and a display area of the detection image Control means for causing the backlight at the boundary of the light to be emitted with the light emission setting set for the detected application , Have a, said control means, the detected application
The size of the boundary portion is determined according to a light emission setting set for the application and a light emission setting set for the application that generates the adjacent image. .

According to a third aspect of the present invention, when a plurality of image signals output from a plurality of image signal output devices are input and a plurality of images based on the plurality of image signals are displayed side by side on one screen, A method for controlling an image display device that emits a backlight with a light emission setting set for an image signal output device that outputs an image signal of the image for each image, the image signal output device being operated by a user A detection step of detecting a detected image, and when an image signal output device operated by the user is detected, a display area of a detected image that is an image based on the image signal output from the detected image signal output device backlight, and the backlight of the boundary portion between the plurality of display areas of the display area and the detection image of the adjacent images is an image that is displayed adjacent to the detected image of the image, said analyzing It possesses a control step of emitting an emission setting set for image signals output device, and in the control step, a flash setting set for the detected image signal output device, the adjacent According to another aspect of the invention, there is provided a control method for an image display device , wherein the size of the boundary portion is determined according to a light emission setting set for an image signal output device that outputs an image .
According to a fourth aspect of the present invention, when a plurality of images generated by a plurality of applications are displayed side by side on a single screen, the light emission setting set for the application that generates the images is performed for each image. A method of controlling an image display device that emits a backlight, wherein a detection step of detecting an application operated by a user, and when an application operated by the user is detected, depending on the detected application A backlight of a display area of a detection image that is a generated image, and a display area of an adjacent image that is an image displayed adjacent to the detection image among the plurality of images and a display area of the detection image A control step for causing the backlight at the boundary to emit light with the light emission setting set for the detected application. Possess a flop, and in the control step, a flash setting set for the detected application, the adjacent images in response to the light emission setting set for the generated application, the boundary The size of the image display device is determined.

  ADVANTAGE OF THE INVENTION According to this invention, when the image from several image signal output devices is displayed side by side on one screen, it can suppress that a user performs wrong color adjustment.

1 is an example of a connection mode of an image display system according to a first embodiment. 1 is an example of a hardware block diagram of a liquid crystal display device and a PC according to Embodiment 1. FIG. An example of arrangement | positioning of LED in a backlight. 1 is an example of a functional block diagram of a liquid crystal display device and a PC according to Embodiment 1. FIG. An example of the determination process of an operation destination determination part. 6 illustrates an example of processing of a display control unit according to the first embodiment. An example of the light emission setting of a backlight. 10 is an example of a connection mode of the image display system according to the second embodiment. FIG. 6 is an example of a hardware block diagram of a liquid crystal display device and a PC according to Embodiment 2. FIG. 6 is an example of a functional block diagram of a liquid crystal display device according to a second embodiment. 10 illustrates an example of processing of a display control unit according to the second embodiment. 10 is an example of a connection mode of an image display system according to a third embodiment. FIG. 10 is an example of a hardware block diagram of a liquid crystal display device and a PC according to Embodiment 3. FIG. 10 is an example of a functional block diagram of a liquid crystal display device and a PC according to Embodiment 3. 10 illustrates an example of processing of a display control unit according to the third embodiment. FIG. 10 is an example of an image displayed on a liquid crystal display device according to Embodiment 3. FIG. An example of the light emission setting of a backlight.

<Example 1>
FIG. 1 is a diagram illustrating an example of a connection mode of the image display system according to the first embodiment of the present invention.
PCs 101 and 102 (image signal output devices) are connected to the liquid crystal display device 100 via cables 107 and 108, respectively. The liquid crystal display device 100 inputs a plurality of image signals output from a plurality of image signal output devices. When a plurality of images based on a plurality of image signals are displayed side by side on one screen, the backlight is set for each image with the light emission setting set for the image signal output device that outputs the image signal of the image. To emit light.

A keyboard 103 and a mouse 104 are connected to the PC 101. The user can operate the PC 101 using the keyboard 103 and the mouse 104. Similarly, a keyboard 105 and a mouse 106 are connected to the PC 102. The cables 107 and 108 are cables compliant with the DVI (trademark) or DisplayPort (trademark) standard, and are capable of communicating image signals, data based on DDC / CI (Display Data Channel Command Interface), and the like. The PCs 101 and 102 transmit image signals and user operation information to the liquid crystal display device 100 via cables 107 and 108, respectively. The user operation information is information indicating that the user (PC) is being operated by the user.

FIG. 2A is a hardware block diagram of the liquid crystal display device 100.
The CPU 201 reads a program for performing various controls from the nonvolatile memory 203 and controls each component block connected to the internal bus 211.
For example, when the user performs a two-screen display operation using the operation button 210, the CPU 201 instructs the image processing circuit 206 to perform a two-screen display. Specifically, the CPU 201 instructs the image processing circuit 206 to display two images based on the two image signals received by the image input circuits 204 and 205 by dividing the screen of the liquid crystal display device 100 into two. .
Further, the CPU 201 sets the light emission setting of the circuit for each image input circuit based on the user operation information received by the image input circuits 204 and 205 and the image quality adjustment parameter for each image input circuit (for each connected PC). The screen area (light emitting area) to which is applied is determined. Then, the information on the determined light emission area is output to the backlight control circuit 208 together with the information on the light emission setting (luminance, color temperature, etc. included in the image quality adjustment parameter) of the area.
In addition, when the user performs an image quality adjustment operation using the operation button 210, the CPU 201 sets an image quality adjustment parameter (light emission setting) for each image input circuit in accordance with the operation and records the image quality adjustment parameter in the nonvolatile memory 203.

The memory 202 temporarily stores data used for the processing of the CPU 201.
The nonvolatile memory 203 stores programs executed by the CPU 201 and image quality adjustment parameters for each image input circuit. Further, correction value data for each of the image input circuits 204 and 205 is stored for each combination of light emission settings of the image input circuits 204 and 205 set in advance at the time of manufacture. The correction value data is data used for processing for determining each light emitting area.
The image input circuit 204 outputs an image signal (image signal output from the PC 101 in this embodiment) input via the cable 107 to the image processing circuit 206. Also, user operation information input via the cable 107 (user operation information output from the PC 101) is output to the CPU 201.
The image input circuit 205 outputs an image signal (image signal output from the PC 102 in this embodiment) input via the cable 108 to the image processing circuit 206. Also, user operation information input via the cable 108 (user operation information output from the PC 102) is output to the CPU 201.
The image processing circuit 206 processes the image signal received from the image input circuits 204 and 205 based on the image quality adjustment parameter recorded in the nonvolatile memory 203 and outputs the processed image signal to the liquid crystal display device 207.

The liquid crystal display device 207 displays an image based on the image signal received from the image processing circuit 206.
The backlight control circuit 208 controls the light emission of the backlight 209 based on the light emission setting and light emission area information sent from the CPU 201. Specifically, the backlight 209 is provided with a plurality of LEDs, and the backlight control circuit 208 controls the light emission of the individual LEDs.

The operation button 210 receives an image quality adjustment operation from the user and notifies the CPU 201 of the operation content. The image quality adjustment operation is an operation for performing image quality adjustment such as adjustment of luminance and color temperature for each of the image signals input to the image input circuits 204 and 205.
The operation button 210 receives a two-screen display operation from the user and notifies the CPU 201 that the operation has been performed.
The internal bus 211 is a bus that connects the constituent blocks of the liquid crystal display device 100 and enables data communication between the constituent blocks.

FIG. 3 is a diagram illustrating the arrangement of LEDs in the backlight 209 of the liquid crystal display device 100.
In this embodiment, three independent (three primary colors) LEDs for each color of red (R), green (G), and blue (B) are set as one set (LED 301), and a total of 384 sets of 16 rows and 24 columns. An LED 301 is arranged.

FIG. 2B is a hardware block diagram of the PC 101. Since the hardware block diagram of the PC 102 is the same as that of the PC 101, the description is omitted.
The CPU 401 controls each component block connected to the internal bus 407, executes the OS and application recorded in the storage device 403, and outputs an image signal to the image output circuit 406.
Further, the CPU 401 receives a signal representing a user operation from the keyboard I / F circuit 404 or the mouse I / F circuit 405, and controls a running application according to the user operation. At the same time, the fact that the user operation has been performed is output to the image output circuit 406 as user operation information.

The memory 402 temporarily stores data used for the processing of the CPU 401.
The storage device 403 stores an OS and applications executed by the CPU 401.
The keyboard I / F circuit 404 receives a user operation via the keyboard 103 and outputs a signal representing the user operation to the CPU 401.
The mouse I / F circuit 405 receives a user operation via the mouse 104 and outputs a signal representing the user operation to the CPU 401.
The image output circuit 406 outputs an image signal output from the CPU 401 and user operation information to the liquid crystal display device 100.
The internal bus 407 is a bus that connects the constituent blocks of the PC 101 and enables data communication between the constituent blocks.

FIG. 4A is a functional block diagram of the liquid crystal display device 100.
When the user performs a two-screen display operation using the operation button 210, the UI unit 501 outputs a two-screen display request to the display control unit 504.
Further, when the user performs an image quality adjustment operation using the operation button 210, the UI unit 501 generates an image quality adjustment parameter setting screen for adjusting the image quality adjustment parameter and outputs the image quality adjustment parameter setting screen to the display control unit 504. Then, the UI unit 501 outputs the image quality adjustment parameter input (adjusted) using the operation button 210 to the display setting management unit 502.

加えて、表示設定管理部５０２は、不揮発性メモリ２０３から補正値データを読み出し、表示制御部５０４に出力する。 The display setting management unit 502 records the image quality adjustment parameter for each image input circuit received from the UI unit 501 in the nonvolatile memory 203 in association with the image input circuit. Further, the image quality adjustment parameter for each image input circuit stored in the nonvolatile memory 203 is read and output to the display control unit 504.
Table 1 shows examples of image quality adjustment parameters (luminance and color temperature; light emission setting) of the image input circuits 204 and 205 (PCs 101 and 102) stored in the nonvolatile memory 203. In this embodiment, as shown in Table 1, the luminance is set to 150 cd / m ² , the color temperature is 7200 K for the image input circuit 204, the luminance is 250 cd / m ² , and the color temperature is set to 9400 K for the image input circuit 205. ing.

In addition, the display setting management unit 502 reads the correction value data from the nonvolatile memory 203 and outputs the correction value data to the display control unit 504.

  The operation destination determination unit 503 detects the image signal output device (PC) operated by the user (detection means). Specifically, based on the user operation information received from the image input circuits 204 and 205, it is determined which of the PCs 101 and 102 the user is operating, and the determination result (operation destination information) is sent to the display control unit 504. Output. The determination process of the operation destination determination unit 503 will be described in detail later.

The display control unit 504 reads the image quality adjustment parameters set for the image input circuits 204 and 205 (PCs 101 and 102) from the display setting management unit 502, and requests the image processing circuit 206 to perform image processing based on the parameters. . At that time, for each image to be displayed, the display control unit 504 requests the backlight control unit 505 to emit the backlight with the light emission setting set for the PC that outputs the image signal of the image (light emission setting). request).
When the display control unit 504 receives a two-screen display request from the UI unit 501, the display control unit 504 requests the image processing circuit 206 to display the image signals from the image input circuits 204 and 205 on two screens. During the two-screen display, the display control unit 504 periodically acquires operation destination information from the operation destination determination unit 503. Then, correction value data corresponding to the combination of the light emission settings of the image input circuits 204 and 205 is acquired from the display setting management unit 502. Thereafter, a light emission area determination request for determining a light emission area based on the acquired operation destination information and correction value data is output to the backlight control unit 505.
Further, the display control unit 504 outputs the image quality adjustment parameter setting screen received from the UI unit 501 to the image processing circuit 206 and requests to be displayed on the liquid crystal device 207.

The backlight control unit 505 controls the backlight control circuit 208 based on the light emission setting request from the display control unit 504. Further, the backlight control unit 505 determines a light emitting region based on the light emitting region determination request acquired from the display control unit 504 (light emitting region determination process).
In this embodiment, when a PC operated by the user is detected, the display area of the image based on the image signal output from the detected PC and the back of the boundary between the image and the adjacent image adjacent thereto are displayed. The light emitting area is determined so that the light is emitted with the same light emission setting. Specifically, the light emission area is determined so that such a backlight emits light with the light emission setting set for the detected PC. That is, in the present embodiment, the backlight control unit 505 and the backlight control circuit 208 implement the control means of the present invention.
Further, in the present embodiment, a light emission area having a boundary size corresponding to the light emission setting set for the detected PC and the light emission setting set for the PC that outputs the adjacent image is determined. The
The light emitting area determination process will be described in detail later.
Note that the processing of the UI unit 501 to the backlight control unit 505 described above is executed by the CPU 201.

FIG. 4B is a functional block diagram of the PC 101. Since the functional block diagram of the PC 102 is the same as that of the PC 101, description thereof is omitted.
The image output control unit 601 outputs drawing information (image signal) generated when the OS or application is executed to the image output circuit 406.
The keyboard driver unit 602 receives a signal representing a user operation performed by the user using the keyboard 103 from the keyboard I / F circuit 404 and operates the OS and applications. Also, keyboard operation information (information indicating whether the user is operating the keyboard) is output to the operation detection unit 604.
The mouse driver unit 603 receives a signal representing a user operation performed by the user using the mouse 104 from the mouse I / F circuit 405, and operates the OS and applications. Also, mouse operation information (information indicating whether or not the user is operating the mouse) is output to the operation detection unit 604.
The operation detection unit 604 acquires keyboard operation information from the keyboard driver unit 602 and mouse operation information from the mouse driver unit 603. If the user is operating the keyboard or mouse, it is determined that the user (PC) is operating, and the user operation information is notified to the image output circuit 406.
Note that the processing of the image output control unit 601 to the operation detection unit 604 described above is executed by the CPU 401.

FIG. 5 is a flowchart of the determination process of the operation destination determination unit 503 based on the user operation information.
When receiving the user operation information from the image input circuit 204 (YES in S0701), the operation destination determination unit 503 determines that “PC 101 is being operated” (S0702). In addition, when the operation destination determination unit 503 does not receive the user operation information from the image input circuit 204 (NO in S0701) and receives the user operation information from the video input circuit 205 (YES in S0703), the “PC102. It is determined that the operation is in progress (S0704). If the user operation information is not received from both of the image input circuits 204 and 205 (NO in S0703), the operation destination determination unit 503 determines that “no operation” (no user operation is performed). (S0705).

  With the processing of this flowchart, for example, when the user operates the keyboard 103 or the mouse 104 connected to the PC 101, the determination result is “in use of the PC on the image input circuit 204 side”. On the other hand, when the user operates the keyboard 105 or the mouse 106 connected to the PC 102, the determination result is “in use of the PC on the image input circuit 205 side”.

  FIG. 6 is a flowchart showing a processing flow until the display control unit 504 outputs a light emission area determination request. The display control unit 504 performs the processing of this flowchart at regular intervals while displaying two screens. Note that the display control unit 504 initializes the operation destination information to “not operated” when the two-screen display is started.

First, the display control unit 504 acquires image quality adjustment parameters of the image input circuits 204 and 205 from the display setting management unit 502 (S0801).
Next, the two acquired image quality adjustment parameters are compared (S0802), and it is determined whether the light emission settings (luminance and color temperature) are different between the image input circuit 204 and the image input circuit 205 (S0803).

When the luminance or color temperature is different between the image input circuit 204 and the image input circuit 205 (YES in S0803), the correspondence between the combination of the light emission setting (luminance and color temperature) of the display setting management unit 502 and the correction value data Correction value data is acquired from the table (S0804). Specifically, correction value data corresponding to a combination of light emission settings of the image input circuits 204 and 205 is acquired.
Next, operation destination information is acquired from the operation destination determination unit 503 (S0805), and it is determined whether or not the acquired operation destination information is information other than “no operation”. When the acquired operation destination information is information other than “no operation” (YES in S0806), a light emission area determination request is output (S0807).

  On the other hand, if the luminance and color temperature match between the image input circuit 204 and the image input circuit 205 (NO in S0803), this flow is terminated without performing the subsequent processing. Also, when the acquired operation destination information is “not operated” (NO in S0806), this flow is terminated without performing the subsequent processing.

Table 2 is a correspondence table showing correspondence between combinations of light emission settings and correction value data. The correction value data is data representing how much the light emitting area is made larger than the image display area based on the image signal input to the corresponding image input circuit. Specifically, the correction value data is necessary for suppressing deterioration in color reproducibility of an image input to the image input circuit for each image input circuit (described as “input” in Table 2). This data represents the size of the boundary.

For example, the image input circuit 204 side luminance of 150 cd / ^{m 2,} the color temperature is 7200K, the brightness of the image input circuit 205 side 250 cd / ^{m 2,} color temperature and was set to 9400K. In this case, in the example of Table 2, the correction value data for the image input circuit 204 is “2”, and the correction value data for the image input circuit 205 is “1”.
Therefore, the backlight control unit 505 performs the light emission area determination process as follows.

In order to suppress a decrease in the color reproducibility of the image based on the image signal input to the image input circuit 204, correction value data for the image input circuit 204 among the acquired correction value data is used. Then, a light emitting region in which the LED 301 in the image display region A based on the image signal input to the image input circuit 204 and the region including the two LEDs 301 outside the display region emit light according to the light emission setting of the image input circuit 204. It is said. In this embodiment, two images input to the image input circuits 204 and 205 are displayed side by side in the horizontal direction of the screen. Therefore, the area including the LEDs 301 in the display area A and the LEDs 301 in the image display area B based on the image signal input to the image input circuit 205 for two columns from the display area A is emitted from the image input circuit 204. It is set as a light emitting area to emit light by setting.
In order to suppress a decrease in color reproducibility of the image input to the image input circuit 205, correction value data for the image input circuit 205 among the acquired correction value data is used. A region including the LEDs 301 in the display region B and the LEDs 301 in the display region A for one column from the display region B is a light emitting region that emits light according to the light emission setting of the image input circuit 205.

The data in Table 2 is prepared in advance. For example, measurement is performed at the time of manufacture, and the generated data is recorded in the nonvolatile memory 203.
When the light emission area determination request is not output, the display areas A and B are light emission areas that emit light according to the light emission settings of the image input circuits 204 and 205, respectively.

Figure 7 (A) ~7 (C) comprises an image input circuit 204 luminance side 150 cd / ^{m 2,} the color temperature is 7200K, the brightness of the image input circuit 205 side 250 cd / ^{m 2,} the color temperature is set to 9400K This shows the light emission setting of the LED 301 in the case of the above. In the figure, the LED 301 shown in black is an LED that emits light according to the light emission setting of the PC 101, and the LED 301 shown in white is an LED that emits light according to the light emission setting of the PC 102. 7A to 7C are examples in the case where 24 rows of LEDs 301 are arranged.

FIG. 7A shows a case where no operation is performed. When not operated, the LEDs 301 for 12 columns from the left of the screen corresponding to the image display area based on the image signal output from the PC 101 emit light with the light emission setting of the PC 101. Further, the LEDs 301 for 12 columns from the right side of the screen corresponding to the image display area based on the image signal output from the PC 102 emit light with the light emission setting of the PC 102.
FIG. 7B shows a case where the user is operating the PC 101. In this case, a total of 14 columns of LEDs 301 corresponding to the display region of the image based on the image signal output from the PC 101 and two columns on the right side of the display region (14 columns from the left of the screen) of the LEDs 301 are displayed on the PC 101. The flash fires with the flash setting. Further, the LEDs 301 for 10 columns from the right side of the screen emit light according to the light emission setting of the PC 102.
FIG. 7C shows a case where the user is operating the PC 102. In this case, a total of 13 columns of LED 301 corresponding to the image display area based on the image signal output from the PC 102 and one column on the left side of the display area (13 columns from the right of the screen) of the LEDs 301 are displayed on the PC 102. The flash fires with the flash setting. In addition, 11 columns of LEDs 301 from the left of the screen emit light according to the light emission setting of the PC 101.

As described above, according to the present embodiment, not only the image display area based on the image signal output from the PC operated by the user, but also the backlight at the boundary between the image and the adjacent image, Light is emitted with the light emission setting set for the PC operated by the user. Thereby, when images from a plurality of PCs are displayed side by side on one screen, it is possible to suppress the color reproducibility of the images from the PC operated by the user from being reduced by the adjacent images. , It is possible to suppress the user from performing wrong color adjustment.
In this embodiment, the size of the boundary is determined according to the light emission setting set for the PC operated by the user and the light emission setting set for the PC that outputs the adjacent image. The Therefore, it is possible to prevent the backlight emission setting of the display area of the adjacent image from being changed unnecessarily.

In the present embodiment, the case where the image signal output device is a PC has been described. However, the image signal output device may be any device that outputs an image signal. For example, it may be a hard disk recorder, a Blu-ray player, a TV tuner, or the like.
In this embodiment, the case where the luminance and the color temperature are used as the light emission setting has been described. However, the present invention is not limited to this. For example, a configuration using only one of luminance and color temperature may be used. The light emission setting may be anything as long as it indicates the backlight driving conditions.
In the present embodiment, an example in which two image signal output devices are connected to a liquid crystal display device is shown, but three or more image signal output devices may be connected by increasing the number of image input circuits. In the present embodiment, an example in which a plurality of images are displayed side by side in the horizontal direction of the screen has been shown, but the way of arranging the images is not limited to this. For example, a plurality of images may be displayed side by side in the vertical direction on the screen, may be displayed in a matrix, or one image may be superimposed on the other as in picture-in-picture. Good.

In the present embodiment, the operation for the PC 101 is preferentially detected. However, the operation for the PC 102 may be preferentially detected, and the user may prioritize the operation for which PC. It may be configured to set whether to detect.
In this embodiment, the user operates the liquid crystal display device to set the light emission settings (brightness and color temperature). However, the method for setting the light emission settings is not limited to this. The configuration may be such that the user operates the PC to set the light emission setting, or the luminance or color temperature is set automatically or manually when the user performs calibration or the like using the PC. Good.
In this embodiment, the image signal output from the PC and the user operation information are input to the liquid crystal display device using a common cable. However, the connection mode is not limited to this. The user operation information may be transmitted using a cable (for example, a USB (Universal Serial Bus) cable) different from the cable used for transmitting the image signal.

<Example 2>
Hereinafter, as a second embodiment of the present invention, an example in which a keyboard and a mouse are connected to a liquid crystal display device instead of a PC will be described. In addition, description is abbreviate | omitted about the part which overlaps with Example 1. FIG.
FIG. 8 is a diagram illustrating an example of a connection mode of the image display system according to the present embodiment.
PCs 111 and 112 are connected to the liquid crystal display device 110 via cables 107 and 108, respectively. The liquid crystal display device 110 and the PC 111 and the liquid crystal display devices 110 and 112 are connected by USB cables 1101 and 1102, respectively. Operation signals (operation signals) performed by the user using the keyboard 103 and the mouse 104 connected to the liquid crystal display device 110 are transmitted to the PCs 111 and 112 via the USB cables 1101 and 1102.

FIG. 9A is a hardware block diagram of the liquid crystal display device 110.
In addition to the function of the CPU 201 in FIG. 2A, the CPU 211 has a function of controlling the keyboard / mouse switching circuit 1204 based on an operation destination switching operation performed by the user using the operation buttons 1203. Specifically, the CPU 211 determines that the operation signal received by the keyboard I / F circuit 1201 and the mouse I / F circuit 1202 is the USB I / F circuit 1205 or 1.
The keyboard / mouse switching circuit 1204 is instructed to output it to any one of 206.
The keyboard I / F circuit 1201 receives an operation signal from the keyboard 103 and outputs the operation signal to the keyboard / mouse switching circuit 1204.
The mouse I / F circuit 1202 receives an operation signal from the mouse 104 and outputs it to the keyboard / mouse switching circuit 1204.

In addition to the function of the operation button 210 in FIG. 2A, the operation button 1203 has a function of receiving an operation destination switching operation from the user and notifying the CPU 211 of the operation content.
The keyboard / mouse switching circuit 1204 transmits an operation signal received from the keyboard I / F circuit 1201 or the mouse I / F circuit 1202 to the USB based on an instruction from the CPU 211.
The data is output to either the I / F circuit 1205 or 1206. In addition, operation destination information indicating which of the USB I / F circuits 1205 or 1206 is to output the operation signal (which of the PCs 101 and 102 is operated) is stored.
The USB I / F circuit 1205 outputs the operation signal received from the keyboard / mouse switching circuit 1204 to the PC 111.
The USB I / F circuit 1206 outputs the operation signal received from the keyboard / mouse switching circuit 1204 to the PC 112.

FIG. 9B is a hardware block diagram of the PC 111. Since the hardware block diagram of the PC 112 is the same as that of the PC 111, the description is omitted.
The CPU 411 controls each component block connected to the internal bus 407 and executes an OS and application recorded in the storage device 403, and outputs an image signal to the image output circuit 406. In addition, based on the operation signal received from the USB I / F circuit 1301, the active application is controlled.
The USB I / F circuit 1301 receives an operation signal from the liquid crystal display device 110 and receives the CPU 4
11 is output.

FIG. 10 is a functional block diagram of the liquid crystal display device 110.
In addition to the function of the UI unit 501 in FIG. 4A, the UI unit 511 controls the keyboard / mouse switching circuit 1204 based on an operation destination switching operation performed by the user using the operation buttons 1203. It has a function of transmitting a switching instruction.

The display control unit 514 reads the image quality adjustment parameters of the image input circuits 204 and 205 from the display setting management unit 502 and requests the image processing circuit 206 to perform image processing based on the parameters. At that time, the display control unit 514 outputs a light emission setting request to the backlight control unit 505.
Further, when receiving a two-screen display request from the UI unit 511, the display control unit 514 requests the image processing circuit 206 to display the image signals from the image input circuits 204 and 205 on two screens. During the two-screen display, the display control unit 514 periodically acquires operation destination information from the keyboard / mouse switching circuit 1204. Then, correction value data corresponding to the combination of the light emission settings of the image input circuits 204 and 205 is acquired from the display setting management unit 502. Thereafter, a light emission area determination request for determining a light emission area based on the acquired operation destination information and correction value data is output to the backlight control unit 505.
The above-described processing is executed by the CPU 211.

FIG. 11 is a flowchart showing a processing flow until the display control unit 514 outputs a light emission area determination request. The display control unit 514 performs the processing of this flowchart at regular intervals while displaying two screens.
The processing of S1501 to S1504 is the same as the processing of S0801 to S0804 in FIG.
After S1504, the display control unit 514 acquires operation destination information from the keyboard / mouse switching circuit 1204 (S1505), and outputs a light emission area determination request in the same manner as in the first embodiment (S0806 and S0807 in FIG. 6). (S1506).
On the other hand, if the luminance and color temperature match between the image input circuit 204 and the image input circuit 205 (NO in S1503), this flow ends without performing subsequent processing. Even when the acquired operation destination information is “not operated”, the process ends without outputting the light emitting area determination request.

  As described above, according to the present embodiment, the keyboard and the mouse are connected to the liquid crystal display device. Then, when the user operates the liquid crystal display device, which PC is operated by the keyboard and the mouse is selected. Thereby, the same effects as those of the first embodiment can be obtained without acquiring user operation information from the PC.

<Example 3>
Hereinafter, an image display system according to Embodiment 3 of the present invention will be described. The present embodiment is an example in the case where the light emission setting is set for each application. In this embodiment, the display area of the image of the active application and the backlight at the boundary between the image and the adjacent image adjacent thereto are emitted with the light emission setting set for the active application. In addition, description is abbreviate | omitted about the part which overlaps with Example 1,2.

FIG. 12 is a diagram illustrating an example of a connection mode of the image display system according to the third embodiment of the present invention.
A PC 121 is connected to the liquid crystal display device 120 via a cable 107.
The PC 121 transmits an image signal, application window information, and image quality adjustment parameters for each application (including the background) to the liquid crystal display device 120 via the cable 107. The application window information is information indicating a display area of an image (window) of an application running on the PC 121 and an active application.

FIG. 13A is a hardware block diagram of the liquid crystal display device 120.
The CPU 221 reads a program for performing various controls from the nonvolatile memory 223 and controls each component block connected to the internal bus 211.
Further, the CPU 221 stores the image quality adjustment parameter for each application received from the PC 121 in the nonvolatile memory 223.
Further, the CPU 221 determines a light emitting area for each application based on the application window information received from the image input circuit 224 and the image quality adjustment parameter for each application recorded in the nonvolatile memory 223. Then, the determined light emission area information is output to the backlight control unit 208 together with the light emission setting information.

The nonvolatile memory 223 stores programs executed by the CPU 221 and image quality adjustment parameters for each application. Further, correction value data for each combination of light emission settings preset at the time of manufacture is stored.
The image input circuit 224 outputs the image signal received from the PC 121 to the image processing circuit 206. Also, the application window information received from the PC 121 and the image quality adjustment parameter for each application are output to the CPU 221.

FIG. 13B is a hardware block diagram of the PC 121.
The CPU 421 controls each component block connected to the internal bus 407, executes the OS and application recorded in the storage device 403, and outputs an image signal to the image output circuit 426.
Further, the CPU 421 receives a signal representing a user operation from the keyboard I / F circuit 404 or the mouse I / F circuit 405, and controls a running application in accordance with the user operation. At the same time, the application window information is output to the image output circuit 426 based on the user operation. Further, the image quality adjustment parameter for each application set by the user is output to the image output circuit 426.
The image output circuit 426 outputs the image signal output from the CPU 421, application window information, and image quality adjustment parameters for each application to the liquid crystal display device 120.

FIG. 14A is a functional block diagram of the liquid crystal display device 121.
The display setting management unit 522 reads the image quality adjustment parameter for each application stored in the nonvolatile memory 223 and outputs it to the display control unit 524. Further, the display setting management unit 522 reads the correction value data from the nonvolatile memory 223 and outputs the correction value data to the display control unit 524. Which correction value data is read will be described later.

The display control unit 524 requests the image processing circuit 206 to perform image processing based on the application window information received from the image input circuit 224 and the image quality adjustment parameter for each application acquired from the display setting management unit 522.
Further, the display control unit 524 requests the backlight control unit 505 to emit the backlight with the light emission setting set for the application for each application based on the application window information and the image quality adjustment parameter for each application. To do. In addition, a light emission area determination request for determining the light emission area based on the application window information, the image quality adjustment parameter for each application, and the correction value data acquired from the display setting management unit 522 is output to the backlight control unit 505. .
The above-described processing is executed by the CPU 221.

FIG. 14B is a functional block diagram of the PC 121.
The operation detection unit 624 displays keyboard operation information (information indicating what kind of keyboard operation has been performed) from the keyboard driver unit 602, and represents mouse operation information (what kind of mouse operation has been performed) from the mouse driver unit 603. Information). Then, application window information is generated based on the keyboard operation information and the mouse operation information, and is output to the image output circuit 426.
The image quality adjustment parameter setting unit 2001 outputs the image quality adjustment parameter for each application set by the user to the image output circuit 426.

FIG. 15 is a flowchart showing a process flow until the display control unit 524 outputs a light emission area determination request. The display control unit 524 performs the processing of this flowchart every time the application window information is updated.
First, the display control unit 524 acquires application window information from the image input circuit 224 (S2101), and acquires image quality adjustment parameters for each application from the display setting management unit 522 (S2102).

  Next, the display area information for each application is acquired from the application window information, and the LED 301 corresponding to each display area is calculated (S2103). For example, when the display resolution of the screen is 3072 pixels × 2048 pixels and the arrangement of the LEDs 301 is as shown in FIG. 3, each LED 301 corresponds to a display area of 128 pixels × 128 pixels. Therefore, when the display area is rectangular, the corresponding LED 301 (specifically, the row range and column range of the corresponding LED 301) can be calculated by dividing the coordinate of the diagonal position of the area by 128. it can.

Then, based on the application window information and the image quality adjustment parameter for each application, the light emission setting set for the active application is acquired (S2104). Further, the light emission setting set for the application or background displayed adjacent to the image of the active application is acquired (S2105).
Next, correction value data corresponding to a combination of the light emission setting of the active application and the application or background light emission setting displayed adjacent to the image of the active application is acquired (S2106).
Then, a light emission area determination request is output (S2107).

Table 3 shows an example of image quality adjustment parameters for each application.
Table 3 shows that, for example, the window of the application “application 1” is displayed with a luminance of 150 cd / m ² and a color temperature of 9400K. Note that “default” represents an image quality adjustment parameter for displaying an application for which image quality adjustment is not performed or a background.

Table 4 shows correspondence between combinations of light emission settings and correction value data. The correction value data is data representing how much the light emitting area to be emitted with the light emission setting of the active application is larger than the image of the application. Specifically, the correction value data is data representing the size of the boundary necessary for suppressing the decrease in color reproducibility in the image of the active application.

For example, assume that the luminance of an active application (active application in the table) is set to 150 cd / m ² and the color temperature is set to 9400K. Further, it is assumed that the brightness of an application or background (adjacent application in the table) displayed adjacent to the image of the active application is set to 250 cd / m ² and the color temperature is set to 7200K. In that case, the correction value data is “1”. An area including the LED 301 in the image display area of the active application and one LED 301 outside the display area is a light emission area that emits light according to the light emission setting of the active application.
In addition, the luminance of the active application is set to 150 cd / m ² , the color temperature is set to 9400K, the luminance of the application displayed adjacent to the image of the active application or the background is set to 150 cd / m ² , and the color temperature is set to 6500K. To do. In this case, the correction value data is “2”, and an area including the LED 301 in the image display area of the active application and the two LEDs 301 outside the display area emits light with the light emission setting of the active application. The light emitting area.
The data in Table 4 is prepared in advance. For example, the measurement is performed at the time of manufacture, and the generated data is recorded in the nonvolatile memory 223.

FIG. 16 is a diagram illustrating an example of an image displayed on the liquid crystal display device 120.
In the example of FIG. 16, the image (window) of the application “application 1” is displayed in a rectangular area 2202 defined by coordinates P1S and P1E on the display area 2201 of the liquid crystal display device 120. In addition, an image of the application “application 2” is displayed in a rectangular area 2203 defined by coordinates P2S and P2E. Since “application 1” is active, the image of “application 1” is displayed in front of the window of “application 2”.
A background is displayed in the remaining area.

  FIG. 17 is a diagram showing the light emission setting of the backlight (LED) when the image shown in FIG. 16 is displayed. An area 2301 indicated by a broken line including backlights B1a and B1b is an area (on the screen) to which the light emission setting of “application 1” is applied, and an area 2302 indicated by a broken line including backlights B2a and B2b is “application 2”. Represents the area to which the light emission setting is applied. Specifically, with respect to the display area of the image of “application 1”, the portion where “application 2” is adjacent is expanded by one backlight outside, and the portion where the background is adjacent is expanded by two backlights outside. The area is lighted with the light emission setting of “application 1”. However, since there is only one display area on the left side of the image of “application 1”, it is expanded by one backlight.

As described above, according to the present embodiment, the display area of the image of the active application and the backlight at the boundary with the adjacent image are emitted with the light emission setting set for the active application. As a result, even if the light emission setting differs for each application, it is possible to suppress the color reproducibility of the image of the active application (the user is operating) from being reduced by the adjacent image, and the user can The color adjustment can be suppressed.
In this embodiment, an example in which two images (windows) are displayed has been described, but the number of windows to be displayed may be three or more.
In the present embodiment, the case where one PC is connected to the liquid crystal display device has been described, but two or more PCs may be connected.

208 Backlight control circuit 503 Operation destination determination unit 505 Backlight control unit

Claims (10)

When a plurality of image signals output from a plurality of image signal output devices are input and a plurality of images based on the plurality of image signals are displayed side by side on one screen, the image signal of the image is displayed for each image. An image display device that emits a backlight with a light emission setting set for an image signal output device that outputs
Detecting means for detecting an image signal output device operated by a user;
When an image signal output device operated by the user is detected by the detection means, a backlight of a display area of a detected image that is an image based on the image signal output from the detected image signal output device ; And a backlight of a boundary portion between a display area of an adjacent image that is an image displayed adjacent to the detection image among the plurality of images and a display area of the detection image, and the detected image signal output device have a, a control means for emitting an emission setting set for,
The control unit is configured to control the boundary portion according to a light emission setting set for the detected image signal output device and a light emission setting set for the image signal output device that outputs the adjacent image. An image display device characterized by determining a size . The image display apparatus according to claim 1, wherein the light emission setting includes luminance or color temperature. The light emission settings include brightness and color temperature,
In the case where the same color temperature is set for the detected image signal output device and the image signal output device that outputs the adjacent image, the control means applies to the detected image signal output device. When the set brightness is higher than the brightness set for the image signal output device that outputs the adjacent image, the brightness set for the detected image signal output device outputs the adjacent image. the image display apparatus according to regions larger than when lower than the luminance set for the image signal output apparatus according to claim 1 or 2, characterized in that to set as the boundary. The light emission settings include brightness and color temperature,
In the case where the same luminance is set for the detected image signal output device and the image signal output device that outputs the adjacent image, the control means sets the detected image signal output device. When the absolute value of the difference between the set color temperature and the color temperature set for the image signal output device that outputs the adjacent image is large, a region larger than the case where the absolute value of the difference is small is defined as the boundary. the image display apparatus of any one of claim 1 to 3, characterized in that setting as part. An image display device that, when displaying a plurality of images generated by a plurality of applications side by side on a single screen, emits a backlight with a light emission setting set for the application that generates the image for each image. There,
Detection means for detecting an application operated by the user;
When an application operated by the user is detected by the detection means, a backlight of a display area of a detection image that is an image generated by the detected application , and the detection among the plurality of images Control means for causing the backlight at the boundary between the display area of the adjacent image, which is an image displayed adjacent to the image, and the display area of the detected image, to emit light with the light emission setting set for the detected application When,
I have a,
The control means determines the size of the boundary according to the light emission setting set for the detected application and the light emission setting set for the application for generating the adjacent image. An image display device characterized by the above. When a plurality of image signals output from a plurality of image signal output devices are input and a plurality of images based on the plurality of image signals are displayed side by side on one screen, the image signal of the image is displayed for each image. A method of controlling an image display device that emits a backlight with a light emission setting set for an image signal output device that outputs
A detection step of detecting an image signal output device operated by a user;
When an image signal output device operated by the user is detected, a backlight of a display area of a detected image that is an image based on the image signal output from the detected image signal output device , and the plurality The backlight of the boundary part between the display area of the adjacent image and the display area of the detected image that are displayed adjacent to the detected image is set for the detected image signal output device. A control step for emitting light with the set emission setting,
I have a,
In the control step, according to the light emission setting set for the detected image signal output device and the light emission setting set for the image signal output device that outputs the adjacent image, the boundary portion A method for controlling an image display device, wherein the size is determined . The method according to claim 6 , wherein the light emission setting includes luminance or color temperature. The light emission settings include brightness and color temperature,
In the case where the same color temperature is set for the detected image signal output device and the image signal output device that outputs the adjacent image, in the control step, for the detected image signal output device When the set brightness is higher than the brightness set for the image signal output device that outputs the adjacent image, the brightness set for the detected image signal output device outputs the adjacent image. The method for controlling an image display device according to claim 6 or 7 , wherein a larger area is set as the boundary portion than when the luminance is lower than that set for the image signal output device. The light emission settings include brightness and color temperature,
In the case where the same luminance is set for the detected image signal output device and the image signal output device that outputs the adjacent image, the control step sets the detected image signal output device. When the absolute value of the difference between the set color temperature and the color temperature set for the image signal output device that outputs the adjacent image is large, a region larger than the case where the absolute value of the difference is small is defined as the boundary. method for controlling an image display apparatus according to any one of claims 6-8, characterized in that setting as part. When displaying a plurality of images generated by a plurality of applications side by side on a single screen, an image display device that emits a backlight with a light emission setting set for the application that generates the image for each image. A control method,
A detection step for detecting an application operated by the user;
When an application operated by the user is detected, a backlight of a display area of a detected image that is an image generated by the detected application , and adjacent to the detected image among the plurality of images A control step of causing the backlight at the boundary between the display area of the adjacent image that is an image to be displayed and the display area of the detected image to emit light with the light emission setting set for the detected application;
I have a,
In the control step, the size of the boundary is determined according to the light emission setting set for the detected application and the light emission setting set for the application that generates the adjacent image < An image display apparatus control method characterized by the above.

Images