Display device, display system, and display control method

Abstract

To appropriately manage display characteristics without impairing the usability of display devices.SOLUTION: A display device includes: a display unit that displays video; a light-receiving unit that measures luminance of a display unit of another display device; a communication unit that transmits information on display characteristics based on a luminance value measured by the light-receiving unit of the display device and receives information on display characteristics based on a luminance value of the display unit of the display device measured by a light-receiving unit of the other display device; and a control unit that corrects the display characteristics of the display unit of the display device based on the information on the display characteristics of the display unit of the display device measured by the light-receiving unit of the other display device received by the communication unit.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a display device, a display system, and a display control method. [Background technology]

[0002] 2. Description of the Related Art In display devices used for medical purposes and the like, a technique is known in which the amount of light on a display screen is measured by a luminance sensor and the amount of light on the display screen is controlled (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2004 / 088401 Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, the use of tablet display devices (hereafter referred to as tablet terminals) has been increasing in medical institutions, etc. Tablet terminals are lightweight and highly portable, so they are used for purposes such as explaining medical conditions to patients, consulting between doctors, and being placed in sterilized cases and brought into operating rooms.

[0005] When a medical image is displayed on a tablet device for diagnosis, it is necessary to appropriately manage the display characteristics of the display screen of the tablet device. However, providing a brightness sensor similar to that of a stationary display device on a small tablet device may cause protrusions on the tablet device screen, which is preferably flat, or may increase the thickness of the tablet device, which may impair usability.

[0006] An object of the present invention is to provide a display device, a display system, and a display control method that are easy to use and capable of appropriately managing the display characteristics of the display device. [Means for solving the problem]

[0007] A display device according to one embodiment of the present invention comprises a display unit that displays an image, a light receiving unit that measures the luminance of the display unit of another display device, a communication unit that transmits information about display characteristics based on the luminance value measured by the light receiving unit of the display device itself and receives information about display characteristics based on the luminance value of the display unit of the display device itself measured by the light receiving unit of the other display device, and a control unit that corrects the display characteristics of the display unit of the display device itself based on the information about the display characteristics of the display unit of the display device itself measured by the light receiving unit of the other display device and received by the communication unit.

[0008] A display system of one embodiment of the present invention includes at least two display devices according to one embodiment of the present invention, wherein the light receiving unit of the self-display device measures the luminance value of the display unit of any of the other display devices, the communication unit of the self-display device receives the measurement result of the luminance value of the display unit of the self-display device measured by the light receiving unit of any of the other display devices, and the control unit of the self-display device corrects the display characteristics of the display unit of the self-display device based on the measurement result of the luminance value of the display unit of the self-display device measured by the light receiving unit of the other display device.

[0009] A display control method of one embodiment of the present invention includes the steps of displaying an image on a display unit, measuring the luminance value of the display unit of another display device with a light receiving unit, transmitting information about display characteristics based on the luminance value measured by the light receiving unit of the display device itself and receiving information about display characteristics based on the luminance value of the display unit of the display device itself measured by the light receiving unit of the other display device, and correcting the display characteristics of the display unit of the display device itself based on the display characteristics of the display unit of the display device itself measured by the light receiving unit of the other display device. Effect of the Invention

[0010] According to the present invention, the display characteristics of a display device can be appropriately controlled with good usability. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a block diagram showing an example of the configuration of a display system according to the first embodiment. [Diagram 2] FIG. 2 is a diagram illustrating an example of the display device according to the first embodiment. [Diagram 3] FIG. 3 is a diagram for explaining the method of correcting display characteristics according to the first embodiment. [Figure 4] FIG. 4 is a sequence diagram showing an example of a processing flow of the display system according to the first embodiment. [Diagram 5] FIG. 5 is a diagram showing an example of a test pattern image according to the first embodiment. [Figure 6] FIG. 6 is a flowchart showing an example of the flow of the measurement process of the display device according to the first embodiment. [Figure 7] FIG. 7 is a flowchart showing an example of the flow of the display characteristic correction process of the display device according to the first embodiment. [Figure 8] FIG. 8 is a sequence diagram showing an example of the flow of display characteristic processing of the display system according to the first embodiment. [Figure 9] FIG. 9 is a flowchart showing an example of a detailed flow of the display characteristic processing of the display device according to the first embodiment. [Figure 10] FIG. 10 is a flowchart showing an example of the flow of the camera calibration process according to the first embodiment. [Figure 11] FIG. 11 is a block diagram showing an example of the configuration of a display system according to the second embodiment. [Figure 12] FIG. 12 is a sequence diagram showing an example of a processing flow of the wireless communication system according to the second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to this embodiment, and when there are multiple embodiments, the present invention also includes a configuration in which each embodiment is combined. In the following embodiments, the same parts are given the same reference numerals, and duplicated explanations will be omitted.

[0013] [First embodiment] The configuration of a display system according to a first embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a block diagram showing an example of the configuration of a display device according to a first embodiment. Fig. 2 is a diagram showing an example of a display device according to the first embodiment.

[0014] As shown in Fig. 1, the display device 10 includes a display unit 20, a camera 22, an operation unit 24, a storage unit 26, a communication unit 28, and a control unit 30. As shown in Fig. 2, the display device 10 is a so-called tablet terminal. The display device 10 may be a smartphone. In the display device 10, the display unit 20 and the camera are provided on the same plane.

[0015] The display unit 20 displays various types of information. The display unit 20 displays, for example, medical images. The display unit 20 displays, for example, a test pattern image used to correct the display characteristics of the display unit 20. The display unit 20 is, for example, a display including a liquid crystal display (LCD) or an organic EL (Electro-Luminescence) display.

[0016] The camera 22 captures an image. The camera 22 detects the intensity of light (such as a brightness value). In this embodiment, the camera 22 is, for example, an in-camera provided on the same plane as the display unit 20. The camera 22 measures, for example, the brightness value of a display unit of a display device other than the display device 10. The camera 22 is a light receiving unit that measures the brightness of the display unit of the display device, and may be, for example, a brightness sensor.

[0017] The operation unit 24 accepts various operations for the display device 10. For example, the operation unit 24 accepts an operation for starting correction of the display characteristics of the display unit 20. The operation unit 24 is realized by, for example, a button, a touch panel, or the like.

[0018] The storage unit 26 is a memory that stores various types of information. The storage unit 26 stores information such as the contents of calculations performed by the control unit 30 and programs. The storage unit 26 stores image information related to a test pattern image used when correcting the display characteristics of the display unit 20. The storage unit 26 stores characteristic information related to the characteristic values ​​of the display characteristics including the luminance value to be set in the display unit 20. The storage unit 26 includes at least one of a RAM (Random Access Memory), a main storage device such as a ROM (Read Only Memory), and an external storage device such as a HDD (Hard Disk Drive).

[0019] The communication unit 28 transmits and receives various information between the display device 10 and an external device. For example, the communication unit 28 receives information relating to the luminance value of the display unit 20 from another display device. For example, the communication unit 28 transmits information relating to the luminance value of the display unit of the other display device measured by the camera 22 to the other display device. The communication unit 28 can be realized by a wireless communication module such as Wi-Fi (registered trademark) and Bluetooth (registered trademark).

[0020] The control unit 30 controls the operation of each unit of the display device 10. The control unit 30 is realized, for example, by a central processing unit (CPU) or a micro processing unit (MPU) executing a program stored in the storage unit 26 or the like using a RAM or the like as a working area. The control unit 30 may be realized, for example, by an integrated circuit such as an application specific integrated circuit (ASIC) or a field programmable gate array (FPGA). The control unit 30 may be realized by a combination of hardware and software.

[0021] The control unit 30 includes a camera control unit 40, a display characteristic determination unit 42, a display characteristic correction unit 44, a display control unit 46, and a communication control unit 48.

[0022] The camera control unit 40, for example, controls the camera 22 to capture an image. The camera control unit 40, for example, controls the camera 22 to measure the luminance value of light. The camera control unit 40 acquires captured video data from the camera 22 and detection results for the luminance value of light, etc.

[0023] The display characteristic determination unit 42 determines the display characteristics of the display unit 20. The display characteristic determination unit 42 determines whether or not the display characteristics of the display unit 20 are necessary based on, for example, a luminance difference detection result of the display unit 20 acquired from another display device.

[0024] The display characteristic correction unit 44 corrects the display characteristics of the display unit 20. For example, when the display characteristic determination unit 42 determines that correction of the display characteristics of the display unit 20 is necessary, the display characteristic correction unit 44 corrects the display characteristics of the display unit 20 based on the detection result of the luminance value of the display unit 20 acquired from another display device.

[0025] The display control unit 46 controls the display unit 20 to display various images on the display unit 20. The display control unit 46, for example, controls the display unit 20 to display medical images on the display unit 20. The display control unit 46, for example, controls the display unit 20 to display a test pattern image for correcting the display characteristics of the display unit 20.

[0026] The communication control unit 48 controls the communication unit 28 to control communication between the display device 10 and an external device. The communication control unit 48 controls, for example, the communication unit 28 to control communication between the display device 10 and another display device.

[0027] [How to correct display characteristics] The method of correcting display characteristics according to the first embodiment will be described with reference to Fig. 3. Fig. 3 is a diagram for explaining the method of correcting display characteristics according to the first embodiment.

[0028] As shown in Fig. 3, the display system 1 includes a display device 10a and a display device 10b. The configurations of the display device 10a and the display device 10b are the same as the display device 10 shown in Figs. 1 and 2, so a description thereof will be omitted.

[0029] As shown in FIG. 3, in the first embodiment, when correcting the display characteristics, the display device 10a and the display device 10b are overlapped vertically. Specifically, the display device 10a and the display device 10b are overlapped vertically so that the camera 22a of the display device 10a contacts the display unit 20b of the display device 10b near the center, and the camera 22b of the display device 10b contacts the display unit 20a of the display device 10a near the center. That is, the display device 10a and the display device 10b are overlapped vertically so that the camera 22a of the display device 10a measures the luminance value of the display unit 20b of the display device 10b, and the camera 22b of the display device 10b measures the luminance value of the display unit 20a of the display device 10a. As a result, the display device 10a corrects the display characteristics of the display unit 20a based on the measurement result of the camera 22b of the display device 10b. Also, the display device 10b corrects the display characteristics of the display unit 20b based on the measurement result of the camera 22a of the display device 10a. In FIG. 3, the number of display devices is described as "2", but the number of display devices may be "3" or more.

[0030] [Display system processing] The processing of the display system according to the first embodiment will be described with reference to Fig. 4. Fig. 4 is a sequence diagram showing an example of the flow of processing of the display system according to the first embodiment.

[0031] The display device 10b displays, for example, a test pattern image stored in the storage unit 26 on the display unit 20b for correcting the display characteristics of the display unit 20a (step S10). FIG. 5 is a diagram showing an example of a test pattern image according to the first embodiment. In this embodiment, a test pattern image according to the guideline (JESRA X-0093) for quality control of medical image display monitors of the Japan Imaging Medical Systems Industry Association (JIRA) is displayed as the test pattern image. The test pattern image IM1 shown in FIG. 5 shows one of test pattern images JIRA BN1 to JIRA BN18. JIRA BN1 to JIRA BN18 are images in which the color of the region R1 shown in FIG. 5 is specified in 18 stages from black to white. The display control unit 36 ​​causes the display unit 20 to display JIRA BN1 to JIRA BN18 in stages according to the transition of time. Then, the process proceeds to step S12. However, the above-mentioned test pattern is merely an example, and any pattern may be used as long as it provides a display gradation for measuring the display characteristics. Also, instead of displaying a pattern only in the center of the screen, it is also acceptable to display a gradation pattern over the entire screen.

[0032] The display device 10a controls the camera 22a to measure the luminance value of the display unit 20b of the display device 10b in a state where the test pattern image is displayed (step S12). The display device 10a transmits the measurement result of the luminance value of the display unit 20b of the display device 10b to the display device 10b via the communication unit 28 (step S14). The processes from step S10 to step S14 are repeatedly executed until the processes for all gradations of the test pattern image are completed.

[0033] The display device 10a displays, for example, a test pattern image stored in the storage unit 26 on the display unit 20a to correct the display characteristics of the display unit 20b (step S16). The display device 10b controls the camera 22b to measure the luminance value of the display unit 20a of the display device 10a in a state in which the test pattern image is displayed (step S18). The display device 10b transmits the measurement result of the luminance value of the display unit 20a of the display device 10a to the display device 10a via the communication unit 28 (step S20). The processing from step S16 to step S20 is repeatedly executed until the processing for all gradations of the test pattern image is completed. The processing from step S16 to step S20 may be executed in parallel with the processing from step S10 to step S14.

[0034] The display device 10a corrects the display characteristics of the display unit 20a of the display device 10a based on the measurement result of the luminance value of the display unit 20a of the display device 10a received from the display device 10b (step S22). The display device 10a transmits information about the corrected display characteristics of the display unit 20a of the display device 10a to the display device 10b (step S24).

[0035] The display device 10b corrects the display characteristics of the display unit 20b of the display device 10b based on the measurement result of the luminance value of the display unit 20b of the display device 10b received from the display device 10a (step S26). The display device 10b transmits information on the corrected display characteristics of the display unit 20b of the display device 10b to the display device 10a (step S28). The processes of steps S26 and S28 may be executed in parallel with the processes of steps S22 and S24.

[0036] The display device 10a and the display device 10b each compare the display characteristics of the display unit 20a with the display characteristics of the display unit 20b (step S30). Specifically, the display device 10a compares the display characteristics corrected in step S22 with the display characteristics received from the display device 10b in step S28 to determine whether the display characteristics match. The display device 10b determines whether the display characteristics received in step S24 match with the display characteristics corrected in step S26. If it is determined that the display characteristics of both the display device 10a and the display device 10b match, the process of FIG. 4 ends. If it is determined that the display characteristics of at least one of the display device 10a and the display device 10b do not match, the process returns to step S10 and is repeated.

[0037] [Display device processing] The measurement process of the display device according to the first embodiment will be described with reference to Fig. 6. Fig. 6 is a flowchart showing an example of the flow of the measurement process of the display device according to the first embodiment.

[0038] The control unit 30 measures the luminance value of the display unit of the other display device (step S40). Specifically, the camera control unit 40 controls the camera 22 to measure the luminance value of the display unit of the other display device on which the test pattern image is displayed. Then, the process proceeds to step S42.

[0039] The control unit 30 transmits the measurement result of the luminance value (step S42). Specifically, the communication control unit 48 transmits, for example, the measurement result measured in step S40 to another display device. Then, the process proceeds to step S44.

[0040] The control unit 30 judges whether or not the measurement of all gradations has been completed (step S44). Specifically, the camera control unit 40 judges whether or not the luminance value has been measured for all gradations of the test pattern image IM1 displayed on the display unit of the other display device. If it is judged that the measurement of all gradations has been completed (step S44; Yes), the process of FIG. 6 is terminated. If it is judged that the measurement of all gradations has not been completed (step S44; No), the process proceeds to step S40 and the above-mentioned process is repeated.

[0041] The display characteristic correction process of the display device according to the first embodiment will be described with reference to Fig. 7. Fig. 7 is a flowchart showing an example of the flow of the display characteristic correction process of the display device according to the first embodiment.

[0042] The control unit 30 starts correcting the display characteristics of the display unit 20 (step S50). Specifically, the control unit 30 starts correcting the display characteristics of the display unit 20 when, for example, an operation to start correcting the characteristics of the display device is received from a user or the like via the operation unit 24. Then, the process proceeds to step S52.

[0043] The control unit 30 displays the test pattern image (step S52). Specifically, the display control unit 46 displays, on the display unit 20, a test pattern image for correcting the display characteristics of the display unit 20, which is stored in the storage unit 26, for example. Then, the process proceeds to step S54.

[0044] The control unit 30 acquires the measurement result of the luminance value of the display unit 20 (step S54). Specifically, the communication control unit 48 acquires, from the other display device, the measurement result of the luminance value of the display unit 20, which is measured by the other display device using a camera, for example. Then, the process proceeds to step S56.

[0045] The control unit 30 determines whether or not the measurement results of all gradations have been acquired (step S56). Specifically, the communication control unit 48 determines whether or not the measurement of the luminance value has been completed for all gradations of the test pattern image IM1. If it is determined that the measurement results of all gradations have not been acquired (step S56; No), the process proceeds to step S58. If it is determined that the measurement results of all gradations have been acquired (step S56; Yes), the process proceeds to step S60.

[0046] If the result of the determination in step S56 is No, the control unit 30 acquires the measurement results of the luminance values ​​of the display unit 20a on which the test pattern image of the different gradation is displayed (step S58). Specifically, the communication control unit 48 acquires, for example, the measurement results of the luminance values ​​of the display unit 20 on which the test pattern image of the different gradation is displayed, which is measured by the other display device using a camera, from the other display device. Then, the process proceeds to step S56. That is, the processes from step S56 to step S58 are repeated until the measurement results of the luminance values ​​of all gradations of the test pattern image IM1 are acquired.

[0047] If it is determined that the result of step S56 is Yes, the control unit 30 determines whether or not the display characteristics (tone characteristics) of the display unit 20 need to be corrected (step S60). Specifically, the display characteristics determination unit 42 determines whether or not the display characteristics of the display unit 20 need to be corrected based on, for example, the measurement result of the luminance value of the display unit 20 acquired from another display device and the characteristic information related to the display characteristics of the luminance value to be displayed by the display unit 20 stored in the storage unit 26. More specifically, the display characteristics determination unit 42 determines that the display characteristics of the display unit 20 need to be corrected when the tone characteristics obtained from all the tone values ​​of the luminance value of the display unit 20 acquired from another display device deviate from the tone characteristics of the luminance value to be displayed by the display unit 20 by a predetermined amount or more. If it is determined that the display characteristics need not be corrected (step S60; No), the process proceeds to step S64. If it is determined that the display characteristics need to be corrected (step S60; Yes), the process proceeds to step S62.

[0048] If it is determined as Yes in step S60, the control unit 30 corrects the display characteristics (tone characteristics) of the display unit 20 (step S62). Specifically, the display characteristics correction unit 44 corrects the display characteristics of the display unit 20 based on, for example, the measurement result of the luminance value of the display unit 20 acquired from another display device and the characteristic information related to the display characteristics of the luminance value to be displayed by the display unit 20 stored in the storage unit 26. More specifically, the display characteristics correction unit 44 corrects the tone characteristics of the display unit 20 based on the tone characteristics obtained from all the tone of the luminance value of the display unit 20 acquired from the other display device so that the tone characteristics of the luminance value of the display unit 20 coincide with the tone characteristics of the luminance value to be displayed by the display unit 20. Then, the process proceeds to step S64. In the above, the correction of the tone characteristics of the luminance value has been described, but the correction is not limited thereto, and may be correction of the display characteristics of the color of the display unit 20 that can be measured by the screen light, or correction of the maximum luminance of the display unit 20, for example, the brightness of the backlight.

[0049] If the result of step S60 is No, or after step S62, the control unit 30 acquires display characteristics from the other display device (step S64). Specifically, the communication control unit 48 acquires the corrected display characteristics from the other display device. Then, the process proceeds to step S66.

[0050] The control unit 30 determines whether the display characteristics match (step S66). Specifically, the display characteristics determination unit 42 determines whether the display characteristics of the display device 10 match the display characteristics of the other display device. If it is determined that the display characteristics match (step S66; Yes), the process of FIG. 7 ends. If it is determined that the display characteristics do not match (step S66; No), the process proceeds to step S50 and the above-mentioned process is repeated.

[0051] The display characteristic processing of the display system according to the first embodiment will be described in detail with reference to Fig. 8. Fig. 8 is a sequence diagram showing an example of the flow of the display characteristic processing of the display system according to the first embodiment.

[0052] The display device 10b sets the adjustment target maximum luminance value and the adjustment target gamma characteristic to be set in the display device 10b (step S70). The adjustment target maximum luminance value means the maximum luminance value of the display unit 20b that is the setting target, and the adjustment target gamma characteristic means the gamma characteristic that is the setting target. Then, the process proceeds to step S72.

[0053] The display device 10b causes the display unit 20b to display the test pattern image at maximum brightness (step S72), and then proceeds to step S74.

[0054] The display device 10a controls the camera 22a to measure the luminance value of the display unit 20b of the display device 10b that is emitting light at the maximum luminance value (step S74). Then, the process proceeds to step S76. The display device 10a transmits the measurement result of the luminance value of the display unit 20b of the display device 10b measured in step S74 to the display device 10b (step S76). Then, the process proceeds to step S78.

[0055] If the measurement result satisfies a predetermined condition, the display device 10b sets the luminance value measured in step S74 as the adjustment target maximum luminance (step S78). If the measurement condition does not satisfy the predetermined condition, the display device 10b resets the adjustment target maximum luminance value set in step S70. Then, the process proceeds to step S80.

[0056] The display device 10a controls the camera 22a to measure the luminance value of the display unit 20 of the display device 10b that is emitting light at the maximum adjustment target luminance (step S80). Then, the process proceeds to step S82. The display device 10a transmits the measurement result of the luminance value of the display unit 20 of the display device 10b measured in step S80 to the display device 10b (step S82).

[0057] The display device 10b corrects the gamma characteristics of the display unit 20b of the display device 10b based on the measurement result of the luminance value transmitted in step S82 so as to match the gamma characteristics with the adjustment target gamma characteristics (step S84).

[0058] Details of the display characteristic processing of the display device according to the first embodiment will be described with reference to Fig. 9. Fig. 9 is a flowchart showing an example of the detailed flow of the display characteristic processing of the display device according to the first embodiment.

[0059] The control unit 30 sets the adjustment target maximum luminance and the adjustment target gamma characteristic of the display unit 20 (step S90). Specifically, the control unit 30 sets the adjustment target maximum luminance and the adjustment target gamma characteristic in accordance with, for example, an input from the user received by the operation unit 24. Then, the process proceeds to step S92.

[0060] The control unit 30 causes the display unit 20 to display an image at maximum brightness (step S92). Specifically, the display control unit 46 displays the test pattern image at maximum brightness on the display unit 20. Then, the process proceeds to step S94.

[0061] The control unit 30 acquires the measurement result of the luminance value of the display unit 20 displaying the image at maximum luminance (step S94). Specifically, the communication control unit 48 acquires from the other display device the luminance value of the display unit 20 displaying the test pattern image at maximum luminance, measured by the camera of the other display device. Then, the process proceeds to step S96.

[0062] The control unit 30 determines whether the luminance value acquired in step S94 satisfies a predetermined condition (step S96). Specifically, the display characteristic determination unit 42 determines whether the predetermined condition, "luminance value acquired in step S94>maximum adjustment target value+adjustment margin", is satisfied. The adjustment margin may be set arbitrarily taking into account an error in the measurement result of the luminance value, etc. If it is determined that the predetermined condition is satisfied (step S96; Yes), the process proceeds to step S98. If it is determined that the predetermined condition is not satisfied (step S96; No), the process proceeds to step S110.

[0063] If the result of the determination in step S96 is Yes, the control unit 30 sets the maximum luminance of the display unit 20 to the adjustment target maximum luminance (step S98). Specifically, the display characteristic correction unit 44 corrects the maximum luminance of the display unit 20 to the adjustment target maximum luminance that is determined to satisfy the predetermined condition. Then, the process proceeds to step S100.

[0064] The control unit 30 acquires the measurement result of the luminance value of the display unit 20 that displays an image at the adjustment target maximum luminance (step S100). Specifically, the communication control unit 48 acquires from the other display device the luminance value of the display unit 20 that displays the test pattern image at the adjustment target maximum luminance set in step S98, measured by the camera of the other display device. Then, the process proceeds to step S102.

[0065] The control unit 30 corrects the gamma characteristics to the adjustment target gamma characteristics (step S102). Specifically, the display characteristic correction unit 44 corrects the gamma characteristics of the display unit 20 to the adjustment target gamma characteristics set in step S90. Then, the process proceeds to step S104.

[0066] The control unit 30 acquires the display characteristics of the other display device after correction (step S104). Specifically, the communication control unit 48 acquires the display characteristics of the other display device that have been corrected to the adjustment target maximum luminance and the adjustment target gamma characteristic. Then, the process proceeds to step S106.

[0067] The control unit 30 determines whether the display characteristics match (step S106). Specifically, the display characteristics determination unit 42 determines whether the display characteristics of the display unit 20 match those of the other display device. If it is determined that the display characteristics match (step S106; Yes), the process of FIG. 9 ends. If it is determined that the display characteristics do not match (step S106; No), the process proceeds to step S108.

[0068] If the result of step S106 is No, the control unit 30 judges whether or not a timeout will occur (step S108). Specifically, the control unit 30 judges that a timeout will occur if a predetermined time has elapsed since the start of correction, or if the correction process has been performed a predetermined number of times or more. If it is judged that a timeout will not occur (step S108; No), the control unit 30 proceeds to step S90 and repeats the above-mentioned process. If it is judged that a timeout will occur (step S108; Yes), the process of FIG. 9 is terminated.

[0069] If the result of step S96 is No, the control unit 30 resets the adjustment target maximum luminance (step S110). Specifically, the control unit 30 resets the adjustment target maximum luminance, for example, in accordance with an input from the user received through the operation unit 24. Then, the process proceeds to step S96.

[0070] [Proofreading] Next, in a first embodiment that describes a method for configuring the camera 22 of the display device 10, the luminance of the display device is measured using a camera. For example, when display characteristics are measured using two display devices, if the camera characteristics of one display device differ from the camera characteristics of the other display device, it is preferable to calibrate the camera characteristics of the two cameras. In the first embodiment, the camera characteristics of the camera 22 are calibrated by comparing the measurement results of a highly reliable external sensor (luminance sensor) with the measurement results of the camera 22.

[0071] The camera calibration process according to the first embodiment will be described with reference to Fig. 10. Fig. 10 is a flowchart showing an example of the flow of the camera calibration process according to the first embodiment.

[0072] First, the display characteristics of the display unit of the other display device are measured by an external sensor (step S120). Specifically, the display characteristics of the display unit of the other display device on which the test pattern image is displayed are measured by using the external sensor. Then, the process proceeds to step S122.

[0073] Next, the display characteristics of the display unit of the other display device are measured by the camera 22 of the display device 10 (step S122). Specifically, the display characteristics of the display unit of the other display device on which the test pattern image is displayed are measured by using the camera 22 of the display device 10. Then, the process proceeds to step S124.

[0074] Next, the measurement results of the luminance values ​​are obtained (step S124). Specifically, the measurement results of the external sensor in step S120 and the measurement results of the camera 22 in step S122 are obtained. Then, the process proceeds to step S126.

[0075] Next, it is determined whether or not there is a difference between the measurement results of the external sensor and the camera 22 (step S126). Specifically, it is determined whether or not there is a difference of a predetermined value or more between the measurement results of the external sensor and the camera 22. If it is determined that there is a difference (step S126; Yes), the process proceeds to step S128. If it is determined that there is no difference (step S126; No), the process of FIG. 10 is terminated.

[0076] If the result of the determination in step S126 is Yes, the characteristics of the camera 22 are corrected based on the measurement result of the external sensor (step S128). Specifically, the camera characteristics of the camera 22 are corrected so that the measurement result of the camera 22 matches the measurement result of the external sensor. Then, the process of FIG. 10 ends.

[0077] In the other display device, by carrying out the same process as in FIG. 10, it is possible to calibrate the display characteristics of the camera 22a of one display device 10a and the camera 22b of the other display device 10b so that they match each other.

[0078] As described above, in the first embodiment, the display device 10a and the display device 10b measure the display characteristics of each other's display unit. In the first embodiment, the display device 10a and the display device 10b correct the display characteristics based on each other's display characteristics so that the display characteristics match each other. This makes it possible to easily match the display characteristics of the display device 10a and the display device 10b.

[0079] In the first embodiment, matching the display characteristics of the display device 10a and the display device 10b is useful, for example, when displaying mammography images of the left and right breasts side by side. Also, in the first embodiment, displaying past and present medical images of the same location side by side on the display device 10a and the display device 10b is useful because it allows past and present situations to be compared.

[0080] [Second embodiment] Next, a second embodiment will be described. In the second embodiment, a plurality of display devices modulate the luminance value of a test pattern image and display it, and the modulated test pattern image is read to transmit and receive various information.

[0081] The configuration of a display system according to the second embodiment will be described with reference to Fig. 11. Fig. 11 is a block diagram showing an example of the configuration of a display system according to the second embodiment.

[0082] As shown in FIG. 11, a display system 1A differs from the display system 1 shown in FIG.

[0083] The image modulation unit 50 modulates the luminance value of the test pattern image displayed on the display unit 20. The image modulation unit 50 modulates the luminance value of the test pattern image in accordance with information to be transmitted to the other display device 10A. The image modulation unit 50 modulates the luminance value of the test pattern image in accordance with a luminance value measured using the camera 22, for example.

[0084] The image determination unit 52 determines information transmitted by the other display device 10A according to the luminance values, based on the pattern of the luminance values ​​of the modulated test pattern image measured by the camera 22. The image determination unit 52 determines the luminance value of its own display unit 20, for example, based on the pattern of the luminance values ​​of the test pattern image modulated according to the luminance values ​​of its own display unit 20, detected by the other camera 22 by the other display device 10A.

[0085] [Processing of wireless communication system] Processing in the wireless communication system according to the second embodiment will be described with reference to Fig. 12. Fig. 12 is a sequence diagram showing an example of a flow of processing in the wireless communication system according to the second embodiment.

[0086] Fig. 12 shows an example of a process in which the display device 10Aa and the display device 10Ab measure each other's luminance value and modulate a test pattern image according to the luminance value to transmit and receive information related to the luminance value. The configurations of the display device 10Aa and the display device 10Ab are the same as the display device 10A shown in Fig. 11, so a description thereof will be omitted.

[0087] The display device 10Ab displays, for example, a test pattern image for correcting the display characteristics of the display unit 20 of the display device 10Ab stored in the storage unit 26 on the display unit 20Ab of the display device 10Ab (step S140). The display device 10Aa controls the camera 22 to measure the luminance value of the display unit 20 of the display device 10Ab in a state in which the test pattern image is displayed (step S142). The display device 10Aa displays, on the display unit 20, a test pattern image for correcting the display characteristics of the display unit 20 of the display device 10Aa stored in the storage unit 26 (step S144). The display device 10Aa modulates the luminance value of the test pattern image displayed in step S144 according to the luminance value measured in step S142 (step S146). Here, an example of a method in which the image modulation unit 50 of the display device 10Aa modulates the test pattern image will be described. The image modulation unit 50 may modulate the test pattern image using, for example, a non-return-to-zero (NRZ) modulation method. In this case, the image modulation section 50 may modulate the test pattern image by, for example, using a non-return-to-zero modulation method, by associating bits 1 and 0 with black and white in the test pattern image, respectively.

[0088] The display device 10Ab controls the camera 22 to measure the luminance value of the modulated test pattern image displayed on the display unit 20 of the display device 10Aa (step S148). The display device 10Ab determines the luminance value of the display unit 20 of the display device 10Aa based on the pattern of the luminance values ​​measured in step S128 (step S150). In this way, in the third embodiment, by modulating the test pattern image, information can be transmitted and received between the display device 10Aa and the display device 10Ab.

[0089] As described above, in the second embodiment, information communication is performed between the display device 10Aa and the display device 10Ab by modulating a test pattern image used to correct display characteristics. As a result, in the second embodiment, information communication can be performed between a plurality of display devices without wired communication using a USB terminal or wireless communication using Bluetooth or the like.

[0090] Although the embodiments of the present invention have been described above, the present invention is not limited to the contents of these embodiments. The above-described components include those that can be easily imagined by a person skilled in the art, those that are substantially the same, and those that are within the so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, various omissions, substitutions, or modifications of the components can be made without departing from the spirit of the above-described embodiments. [Explanation of symbols]

[0091] 10,10A display device 20 Display section 22 Camera 24 Control section 26 Memory section 28 Communications Department 30,30A Control section 40 Camera control unit 42 Display characteristics judgment section 44 Display characteristic correction section 46 Display control section 48 Communication control section 50 Image Modulation Section 52 Image Judgment Section

Claims

1. A display unit for displaying an image; a light receiving unit for measuring a luminance value of a display unit of the other display device; A communication unit that transmits information on display characteristics based on the luminance value measured by the light receiving unit of the display device to the other display device and receives information on display characteristics based on the luminance value of the display unit of the display device measured by the light receiving unit of the other display device from the other display device; A control unit that corrects the display characteristics of the display unit of the display device based on information on the display characteristics of the display unit of the display device measured by the light receiving unit of the other display device received by the communication unit, The communication unit further receives information on corrected display characteristics of the display unit of the other display device from the other display device, When the received information on the corrected display characteristics of the display unit of the other display device does not match the information on the corrected display characteristics of the display unit of the display device itself, the control unit repeats the process of correcting the display characteristics of the display unit of the display device itself. Display device.

2. An image modulation unit that transmits information including a luminance value of the display unit of the other display device measured by the light receiving unit of the self display device to the other display device by modulating a predetermined image to be displayed on the display unit of the self display device; and an image determination unit that receives information including a luminance value of the display unit of the display device from the other display device by measuring a luminance value of a modulated predetermined image displayed on the display unit of the other display device with the light receiving unit, The control unit of the display device corrects the display characteristics of the display unit of the display device based on the information received by the image determination unit. The display device according to claim 1 .

3. The display device according to claim 1 or 2, The light receiving unit of the display device measures a luminance value of the display unit of the other display device, The communication unit of the display device receives a measurement result of a luminance value of the display unit of the display device from any one of the other display devices, the measurement result being measured by a light receiving unit of any one of the other display devices; The control unit of the display device corrects the display characteristics of the display unit of the display device based on a measurement result of the luminance value of the display unit of the display device measured by the light receiving unit of the other display device. Display system.

4. displaying the image on a display unit; measuring a luminance value of a display unit of the other display device by a light receiving unit; A step of transmitting information on display characteristics based on the luminance value measured by the light receiving unit of the display device itself to the other display device by a communication unit, and receiving information on display characteristics based on the luminance value of the display unit of the display device itself measured by the light receiving unit of the other display device from the other display device; A step of correcting the display characteristics of the display unit of the display device itself based on the display characteristics of the display unit of the display device itself measured by the light receiving unit of the other display device and received by a control unit; Including, The communication unit further receives information on corrected display characteristics of the display unit of the other display device from the other display device, When the received information on the corrected display characteristics of the display unit of the other display device does not match the information on the corrected display characteristics of the display unit of the display device itself, the control unit repeats the process of correcting the display characteristics of the display unit of the display device itself. Display control method.

Images