Information processing device, television receiver, method for processing information, and program

Abstract

To provide a technology that allows a user to test visual acuity at optional separation distance.SOLUTION: An information processing device (1) includes: a measurement part (110) for measuring a separation distance between a display (13) and an object user; a calculation part (120) for calculating a displaying size of an index for testing visual acuity in accordance with the measured separation distance; and a display control part (130) for displaying the index with the calculated displaying size on the display (13).SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an information processing device, a television receiver, an information processing method, and a program used in a visual acuity test. [Background technology]

[0002] Techniques are known for testing a user's vision.

[0003] Patent Document 1 discloses a system for testing a user's visual acuity using a computerized consumer device. The system uses an image of the user captured by a camera to determine the distance between the user and the consumer device. The system also instructs the user to adjust the distance between the user and the consumer device until the distance reaches a predetermined distance range. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2021-507792 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the system described in Patent Document 1 does not take into consideration a situation in which the distance between the user and the consumer device cannot be adjusted to a predetermined distance range. Examples of such a situation include a wall-mounted consumer device that cannot be moved, a heavy consumer device that cannot be moved, a user that cannot move the device, and a room in which the test is performed that is small. In such cases, the distance between the user and the consumer device cannot be adjusted to a predetermined distance range. Therefore, there is a demand for a technology that allows a user to take a visual acuity test at any distance.

[0006] One aspect of the present invention aims to provide a technology that allows a user to take a vision test at any distance. [Means for solving the problem]

[0007] In order to solve the above problems, an information processing device according to one embodiment of the present invention includes a measurement unit that measures the distance between a display unit and a target user, a calculation unit that calculates a display size of an index for a visual acuity test based on the measured distance, and a display control unit that displays the index on the display unit at the calculated display size.

[0008] In order to solve the above problem, an information processing method according to one embodiment of the present invention includes the steps of measuring a distance between a display unit and a target user, calculating a display size of an index for visual acuity testing based on the measured distance, and displaying the index on the display unit at the calculated display size.

[0009] In order to solve the above problems, a program according to one embodiment of the present invention causes a computer to function as a measurement unit that measures the distance between a display unit and a target user, a calculation unit that calculates the display size of an index for a visual acuity test based on the measured distance, and a display control unit that displays the index on the display unit at the calculated display size. Effect of the Invention

[0010] According to one aspect of the present invention, a user can have their vision tested at any distance. [Brief description of the drawings]

[0011] [Figure 1] 1 is a block diagram showing a configuration of an information processing device according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a diagram showing an example of a visual acuity test using the information processing device according to the first embodiment of the present invention. [Diagram 3] 4 is a flowchart showing the flow of an information processing method according to the first embodiment of the present invention. [Figure 4] FIG. 11 is a diagram showing an index displayed when the separation distance is 5 m in the first embodiment of the present invention. [Diagram 5] FIG. 4 is a diagram showing an index displayed when the separation distance is 3 m in the first embodiment of the present invention. [Figure 6] FIG. 1 is a diagram showing an example of the appearance of a television receiver according to a first embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] [Embodiment 1] Hereinafter, one embodiment of the present invention will be described in detail.

[0013] (Information processing device 1) The information processing device 1 according to the present embodiment is a device that tests the visual acuity of a target user by displaying an index for a visual acuity test. The information processing device 1 also changes the display size of the index according to the distance between the target user and the information processing device 1. Examples of the information processing device 1 include, but are not limited to, a television receiver, a tablet, and a smartphone.

[0014] The configuration of the information processing device 1 will be described with reference to Fig. 1. Fig. 1 is a block diagram showing the configuration of the information processing device 1 according to this embodiment.

[0015] As shown in FIG. 1, the information processing device 1 includes a control unit 10, a storage unit 11, an input receiving unit 12, a display unit 13, and a camera 14.

[0016] The storage unit 11 stores information referenced by the control unit 10. Examples of the information stored in the storage unit 11 include, but are not limited to, information indicating the number of pixels of the display unit 13 and the size of the display unit 13, which will be described later. Examples of the storage unit 11 include, but are not limited to, a flash memory, a hard disk drive (HDD), a solid state drive (SSD), or a combination of these.

[0017] The input receiving unit 12 acquires information indicating an input from a user. The input receiving unit 12 supplies the acquired information to the control unit 10. Examples of information acquired by the input receiving unit 12 include, but are not limited to, information on a displayed indicator. Examples of the input receiving unit 12 include, but are not limited to, a button, a light receiving unit of a remote controller, a touch pad, and a microphone.

[0018] The display unit 13 displays an image based on an instruction from the control unit 10. Examples of the display unit 13 include, but are not limited to, a liquid crystal display and an organic EL (Electro Luminescence) display.

[0019] The camera 14 captures an image. The camera 14 supplies the captured image to the control unit 10. One example of the camera 14 is a stereo camera.

[0020] Furthermore, the information processing device 1 may include a LIDAR (Light Detection and Ranging) device that measures the distance to the target user, instead of or in addition to the camera 14. In this case, the LIDAR supplies information indicating the distance to the target user to the control unit 10.

[0021] (Control unit 10) The control unit 10 controls each component included in the information processing device 1. The control unit 10 also includes a measurement unit 110, a calculation unit 120, a display control unit 130, and an acquisition unit 140, as shown in FIG.

[0022] The measurement unit 110 measures the distance between the display unit 13 and the target user.

[0023] As an example, the measurement unit 110 measures the distance between the display unit 13 and the target user by using the image supplied from the camera 14. A known method is used as a method for the measurement unit 110 to measure the distance by using the image supplied from the camera 14. As another example, in a case where the information processing device 1 includes a LIDAR, the measurement unit 110 measures the distance between the display unit 13 and the target user by using information supplied from the LIDAR.

[0024] Here, when the measurement unit 110 uses an image supplied from the camera 14, the distance measured by the measurement unit 110 is the separation distance between the camera 14 and the target user. The measurement unit 110 may set the measured distance as the separation distance between the display unit 13 and the target user. Alternatively, the measurement unit 110 may calculate the separation distance between the display unit 13 and the target user from the distance measured with reference to the image supplied from the camera 14, based on the positional relationship between the camera 14 and the display unit 13. The same applies when the information processing device 1 includes a LIDAR instead of the camera 14.

[0025] The calculation unit 120 calculates the display size of the index for the visual acuity test according to the separation distance measured by the measurement unit 110. For example, when the index is a Landolt ring, the calculation unit 120 calculates the length of the gap of the Landolt ring as the display size.

[0026] As one example, the calculation unit 120 calculates the display size of the index according to the number of pixels and the size of the display unit 13. As another example, the calculation unit 120 calculates the display size of the index according to information acquired by the acquisition unit 140, which will be described later. An example of the process executed by the calculation unit 120 will be described later.

[0027] The display control unit 130 controls the display unit 13. As one example, the display control unit 130 causes the display unit 13 to display an indicator at the display size calculated by the calculation unit 120. As another example, the display control unit 130 causes the display unit 13 to display an image for calculating the size of the display unit 13. An example of this process will be described later.

[0028] The acquiring unit 140 acquires the information supplied to the control unit 10. The acquiring unit 140 stores the acquired information in the storage unit 11.

[0029] As one example, the acquisition unit 140 acquires information indicating the size of the display unit 13 from the user via the input acceptance unit 12. As another example, the acquisition unit 140 acquires a captured image from the camera 14. As yet another example, the acquisition unit 140 acquires information indicating the size of an image displayed on the display unit 13 and used to calculate the size of the display unit 13 from the user via the input acceptance unit 12, as information indicating the size of the display unit 13. An example of this process will be described later.

[0030] (Visual acuity test using information processing device 1) An example of how a visual acuity test is performed using the information processing device 1 will be described with reference to Fig. 2. Fig. 2 is a diagram showing an example of how a visual acuity test is performed using the information processing device 1 according to this embodiment.

[0031] As shown in FIG. 2, the information processing device 1 displays an index m (Landolt ring) with a display size according to the separation distance on the display unit 13. The index m is displayed at a display size calculated according to the separation distance between the display unit 13 and the target user U. The separation distance is measured by the measurement unit 110 based on an image including the target user U as a subject captured by the camera 14. In FIG. 2, the Landolt ring is displayed on the display unit 13 as the index m for the visual acuity test, but the index m for the visual acuity test may be other than the Landolt ring. Examples of the index m other than the Landolt ring include, but are not limited to, hiragana, katakana, the alphabet, an E chart, and a Snellen index.

[0032] When the index m is displayed, the information processing device 1 receives an input from the target user U indicating the direction of the gap (gap) of the index m displayed on the display unit 13 that the target user U has determined. As an example, when the target user U inputs the determined direction of the gap of the index m to the remote controller, the input receiving unit 12, which is a light receiving unit of the remote controller, acquires information indicating the direction of the gap of the index m that the target user U has determined. As another example, when the target user U vocalizes the direction of the gap of the index m that the target user U has determined, the input receiving unit 12, which is a microphone, acquires information indicating the direction of the gap of the index m that the target user U has determined.

[0033] The information processing device 1 determines the visual acuity of the target user U based on the orientation of the index m displayed on the display unit 13 and the orientation determined by the target user U. For example, when the orientation of the index m displayed on the display unit 13 matches the orientation determined by the target user U, the reciprocal of the visual angle between the target user U and the gap between the index m becomes the visual acuity of the target user U. On the other hand, when the orientation of the index m displayed on the display unit 13 does not match the orientation determined by the target user U, the information processing device 1 displays the index m with an increased display size (and the length of the gap), and again acquires information indicating the orientation of the gap between the index m determined by the target user U.

[0034] (Information processing method) The process flow of the information processing method executed by the information processing device 1 will be described with reference to Fig. 3. Fig. 3 is a flowchart showing the process flow of the information processing method according to this embodiment.

[0035] (Step S11) In step S11, the measurement unit 110 measures the distance between the display unit 13 and the target user.

[0036] (Step S12) In step S12 , the calculation unit 120 calculates the display size of the target for the visual acuity test in accordance with the separation distance measured by the measurement unit 110 .

[0037] (Step S13) In step S13 , the display control unit 130 causes the display unit 13 to display the index at the display size calculated by the calculation unit 120 .

[0038] (Example 1 of Processing Executed by Calculation Unit 120) An example of the process executed by the calculation unit 120 will be described. In this example, a process of calculating the length of the gap of the Landolt ring displayed on the display unit 13 by the calculation unit 120 will be described. Hereinafter, in the example of the process executed by the calculation unit 120, a case where the index is the Landolt ring will be described.

[0039] As described above, the visual acuity of the target user is the reciprocal of the visual angle between the target user and the gap in the Landolt ring. For example, if the target user can distinguish the gap x (mm) in the Landolt ring when the visual angle is y, the visual acuity of the target user is (1 / y). Here, the unit of visual angle y is minutes (1 / 60 of a degree). Therefore, when checking whether the visual acuity is (1 / y) or more, the calculation unit 120 calculates the gap x (mm) using the following formula (1). x=Separation distance (mm)×2×tan(y / 2) ···(1) As an example, when the distance between the display unit 13 and the target user is 5 m, the gap of the Landolt ring at which the visual angle is 1 (visual acuity 1.0) is 1.5 mm. As another example, when the distance between the display unit 13 and the target user is 3 m, the gap of the Landolt ring at which the visual angle is 1 (visual acuity 1.0) is 0.9 mm.

[0040] (Example 2 of Processing Executed by Calculation Unit 120) Another example of the process executed by the calculation unit 120 will be described. In this example, a case where an image of a Landolt ring (or data indicating an image) to be displayed on the display unit 13 for each gap length is stored in the storage unit 11 in advance will be described with reference to Figs. 4 and 5. Fig. 4 is a diagram showing an index displayed when the separation distance is 5 m in this embodiment. Fig. 5 is a diagram showing an index displayed when the separation distance is 3 m in this embodiment. Here, the image of the Landolt ring stored in the storage unit 11 in advance is an image based on the number of pixels and the size of the display unit 13.

[0041] In this example, the calculation unit 120 first calculates the length of the gap of the Landolt ring according to the visual acuity to be tested, using information indicating the separation distance measured by the measurement unit 110. Then, the calculation unit 120 acquires an image of the calculated length of the gap of the Landolt ring from the storage unit 11. The calculation unit 120 supplies the acquired image to the display control unit 130.

[0042] As an example, when the separation distance measured by the measurement unit 110 is 5 m and the visual acuity of the target user is to be tested as being 1.0 or higher, the calculation unit 120 first calculates a gap of 1.5 mm between the Landolt rings. Then, the calculation unit 120 acquires an image of the Landolt ring with a gap of 1.5 mm from the storage unit 11 and supplies it to the display control unit 130. In this case, as shown in FIG. 4, the display unit 13 displays a Landolt ring m1 with a gap of 1.5 mm.

[0043] As another example, when the separation distance measured by the measurement unit 110 is 3 m and the visual acuity of the target user is to be tested as being 1.0 or higher, the calculation unit 120 first calculates a gap of 0.9 mm in the Landolt ring. Then, the calculation unit 120 acquires an image of the Landolt ring with a gap of 0.9 mm from the storage unit 11 and supplies it to the display control unit 130. In this case, as shown in FIG. 5, the display unit 13 displays a Landolt ring m2 with a gap of 0.9 mm.

[0044] With this configuration, the information processing device 1 can cause the display unit 13 to display an indicator with an appropriate display size according to the separation distance.

[0045] (Example 3 of Processing Executed by Calculation Unit 120) A description will be given of yet another example of the process executed by calculation unit 120. In this example, a configuration will be described in which calculation unit 120 calculates the display size of the index according to the number of pixels of display unit 13 and the size of display unit 13. In this configuration, information indicating the number of pixels of display unit 13 and the size of display unit 13 is stored in advance in storage unit 11.

[0046] In this example, the storage unit 11 stores information indicating the number of vertical pixels and the number of horizontal pixels of the display unit 13, and the vertical length and horizontal length of the display unit 13. In the following, as an example, a case where the number of horizontal pixels of the display unit 13 is 3840, the number of vertical pixels is 2160, the horizontal length is 88.6 cm, and the vertical length is 49.8 cm (the diagonal length of the display unit 13 is 40 inches) will be described. That is, in this example, the horizontal length and vertical length of one pixel in the display unit 13 are both 0.23 mm.

[0047] As an example, when the separation distance measured by the measurement unit 110 is 5 m and the target user's visual acuity is checked to see if it is 1.0 or higher, the calculation unit 120 first determines that the indicator to be displayed on the display unit 13 is a Landolt ring with a gap of 1.5 mm.

[0048] Next, the calculation unit 120 determines the number of pixels of the gap depending on the number of pixels of the display unit 13 and the size of the display unit 13. As shown in Fig. 4, when the determined Landolt ring has a vertical gap of 1.5 mm, the calculation unit 120 determines the index to be displayed on the display unit 13 to be the Landolt ring m1 with a gap of 1.5 / 0.23 ≈ 7 pixels.

[0049] As another example, when the separation distance measured by the measurement unit 110 is 3 m and the target user's visual acuity is checked to see if it is 1.0 or higher, the calculation unit 120 first determines that the indicator to be displayed on the display unit 13 is a Landolt ring with a gap of 0.9 mm.

[0050] Next, the calculation unit 120 determines the number of pixels of the gap depending on the number of pixels of the display unit 13 and the size of the display unit 13. As shown in Fig. 5, when the determined Landolt ring has a vertical gap of 0.9 mm, the calculation unit 120 determines the index to be displayed on the display unit 13 to be the Landolt ring m3 with a gap of 0.9 / 0.23 ≈ 4 pixels.

[0051] With this configuration, the information processing device 1 can cause the display unit 13 to display an appropriate indicator according to the number of pixels of the display unit 13 and the size of the display unit 13 .

[0052] (Example 4 of Processing Executed by Calculation Unit 120) Another example of the process executed by the calculation unit 120 will be described. In this example, a configuration will be described in which the acquisition unit 140 acquires information indicating the size of the display unit 13 from the user. In this configuration, the calculation unit 120 calculates the display size of the index according to the information acquired by the acquisition unit 140. Also, in this configuration, the number of pixels (the number of horizontal pixels and the number of vertical pixels) of the display unit 13 is stored in the storage unit 11.

[0053] First, the acquisition unit 140 acquires information indicating the size of the display unit 13 from the user. The method by which the acquisition unit 140 acquires the information is not limited, and one example is a method in which the acquisition unit 140 acquires the information by displaying an image on the display unit 13 that prompts the user to input the size of the display unit 13. Another example is a method in which the acquisition unit 140 acquires the information by outputting a sound that prompts the user to input the size of the display unit 13.

[0054] When the acquisition unit 140 acquires information indicating the size of the display unit 13, the calculation unit 120 calculates the size of one pixel using the acquired information and the number of horizontal pixels and the number of vertical pixels of the display unit 13 stored in the storage unit 11. The method of calculating the length of the gap in the Landolt ring and the method of calculating the number of pixels in the gap are as described above.

[0055] For example, a case will be described in which the acquisition unit 140 acquires information indicating that the size of the display unit 13 is 88.6 cm in width and 49.8 cm in height, and the number of horizontal pixels of the display unit 13 stored in the storage unit 11 is 3840 and 2160 in height. In this case, the size of one pixel is 0.23 mm in both width and height. Therefore, when the calculation unit 120 determines the display size of the Landolt ring to be a Landolt ring with a vertical gap of 1.5 mm, the calculation unit 120 determines the indicator to be displayed on the display unit 13 to be a Landolt ring with a gap of 1.5 / 0.23 ≒ 7 pixels.

[0056] In this configuration, the acquisition unit 140 may acquire information indicating the length of a diagonal line of the display unit 13 from the user. In this case, the length of the diagonal line of the display unit 13, the horizontal length of the display unit 13, and the vertical length of the display unit 13 are stored in advance in the storage unit 11 in association with each other, whereby the calculation unit 120 can calculate the display size of the Landolt ring to be displayed.

[0057] With this configuration, even if the screen size of the display unit 13 is not stored in the storage unit 11 in advance, the information processing device 1 can cause the display unit 13 to display an indicator of an appropriate display size.

[0058] (Example 5 of Processing Executed by Calculation Unit 120) Yet another example of the process executed by the calculation unit 120 will be described. In this example, a configuration will be described in which the display control unit 130 causes the display unit 13 to display an image for calculating the size of the display unit 13, and the acquisition unit 140 acquires information indicating the size of the image. In this configuration, the calculation unit 120 calculates the display size of the index according to the number of pixels of the display unit 13 and the size of the display unit 13 calculated from the information acquired by the acquisition unit 140. In this configuration as well, the number of pixels of the display unit 13 is stored in the storage unit 11.

[0059] First, the display control unit 130 causes the display unit 13 to display an image for calculating the size of the display unit 13. The image for calculating the size of the display unit 13 is not particularly limited, but an example thereof is a rectangle having a predetermined number of pixels (for example, 100 pixels x 100 pixels).

[0060] Next, the acquisition unit 140 acquires information indicating the size of the image displayed on the display unit 13 from the user. The method by which the acquisition unit 140 acquires the information is not limited, and one example is a method in which the acquisition unit 140 acquires the information by displaying text on the display unit 13 that prompts the user to input the size of the image displayed on the display unit 13. Another example is a method in which the acquisition unit 140 acquires the information by outputting a sound that prompts the user to input the size of the image displayed on the display unit 13.

[0061] When the acquisition unit 140 acquires information indicating the size of the image displayed on the display unit 13, the calculation unit 120 first calculates the size of the display unit 13 based on the information. For example, assume that the display control unit 130 causes the display unit 13 to display a rectangle of 100 pixels x 100 pixels as an image for calculating the size of the display unit 13. In this case, when the acquisition unit 140 acquires information indicating that the length of one side of the rectangle is 23 mm, the calculation unit 120 calculates the size of one pixel of the display unit 13 as 23 mm / 100 = 0.23 mm. The method of calculating the length of the gap in the Landolt ring and the method of calculating the number of pixels in the gap are as described above.

[0062] With this configuration, the information processing device 1 can display an appropriate indicator on the display unit 13 even if the screen size of the display unit 13 is not stored in advance in the memory unit 11 and the user does not know the screen size of the display unit 13.

[0063] (Television Receiver) As described above, the information processing device 1 may be a television receiver. That is, a television receiver may include the information processing device 1. An example of the appearance of the television receiver 100 is shown in FIG. 6. FIG. 6 is a diagram showing an example of the appearance of the television receiver 100.

[0064] 6, the television receiver 100 includes a display unit 113. By displaying an index on the display unit 113, the user's eyesight can be tested.

[0065] (Effects of information processing device 1) In this way, the information processing device 1 according to the present embodiment displays, on the display unit 13, an index for a visual acuity test with a display size according to the distance between the display unit 13 and the target user. Therefore, the information processing device 1 according to the present embodiment can allow the user to take a visual acuity test regardless of the distance between the display unit 13 and the target user. That is, the information processing device 1 according to the present embodiment has the effect of allowing the user to take a visual acuity test at any distance.

[0066] [Software implementation example] The functions of the information processing device 1 (hereinafter referred to as the "device") can be realized by a program for causing a computer to function as the device, and a program for causing a computer to function as each control block of the device (particularly each part included in the control unit 10).

[0067] In this case, the device includes a computer having at least one control device (e.g., a processor) and at least one storage device (e.g., a memory) as hardware for executing the program. The control device and storage device execute the program to realize each function described in each of the above embodiments.

[0068] The program may be non-transitory and may be recorded in one or more computer-readable recording media. The recording media may or may not be included in the device. In the latter case, the program may be provided to the device via any wired or wireless transmission medium.

[0069] In addition, some or all of the functions of each of the control blocks can be realized by a logic circuit. For example, an integrated circuit in which a logic circuit that functions as each of the control blocks is formed is also included in the scope of the present invention. In addition, the functions of each of the control blocks can be realized by, for example, a quantum computer.

[0070] Furthermore, each process described in each of the above embodiments may be executed by AI (Artificial Intelligence). In this case, the AI ​​may be executed by the control device or another device (for example, an edge computer or a cloud server).

[0071] 〔summary〕 The information processing device (1) according to aspect 1 of the present invention includes a measurement unit (110) that measures the distance between a display unit (13) and a target user, a calculation unit (120) that calculates the display size of an index for a visual acuity test based on the measured distance, and a display control unit (130) that displays the index on the display unit at the calculated display size.

[0072] According to the above configuration, it is possible to allow the user to take the visual acuity test at any distance.

[0073] In the information processing device (1) according to aspect 2 of the present invention, in the above aspect 1, the calculation unit (120) may calculate the display size of the index based on the number of pixels of the display unit (13) and the size of the display unit.

[0074] According to the above configuration, it is possible to cause the display unit to display an appropriate indicator in accordance with the number of pixels and the size of the display unit.

[0075] The information processing device (1) according to aspect 3 of the present invention, in aspect 2 above, may further include an acquisition unit (140) that acquires information indicating the size of the display unit (13) from a user, and the calculation unit (120) may calculate the display size of the indicator according to the information acquired by the acquisition unit.

[0076] According to the above configuration, even if the screen size of the display unit is not stored in advance in the storage unit, it is possible to cause the display unit to display an indicator of an appropriate display size.

[0077] In the information processing device (1) of aspect 4 of the present invention, in the above aspect 3, the display control unit (130) further causes the display unit to display an image for calculating the size of the display unit (13), the acquisition unit (140) acquires information indicating the size of the image displayed on the display unit as information indicating the size of the display unit, and the calculation unit (120) may calculate the display size of the indicator based on the number of pixels of the display unit and the size of the display unit calculated from the information indicating the size of the display unit.

[0078] According to the above configuration, even if the screen size of the display unit is not stored in the memory unit in advance and the user does not know the screen size of the display unit, an appropriate indicator can be displayed on the display unit.

[0079] A television receiver (100) according to a fifth aspect of the present invention includes the information processing device (1) according to any one of the first to fourth aspects.

[0080] According to the above configuration, a television receiver that achieves the same effects as the first aspect can be realized.

[0081] The information processing method according to aspect 6 of the present invention includes a step (S11) of measuring the distance between a display unit (13) and a target user, a step (S12) of calculating the display size of an index for visual acuity testing based on the measured distance, and a step (S13) of displaying the index on the display unit at the calculated display size.

[0082] According to the above configuration, the information processing method achieves the same effects as the information processing device according to the first aspect.

[0083] The information processing device (1) according to each aspect of the present invention may be realized by a computer. In this case, the information processing device program that causes the computer to operate as each part (software element) of the concession processing device to realize the information processing device on the computer, and the computer-readable recording medium on which the program is recorded, also fall within the scope of the present invention.

[0084] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Furthermore, new technical features can be formed by combining the technical means disclosed in the respective embodiments. [Explanation of symbols]

[0085] 1. Information processing device 10 Control section 11 Storage section 12 Input reception section 13, 113 Display section 14 Camera 100 Television receiver 110 Measuring section 120 Calculation section 130 Display control unit 140 Acquisition Department

Claims

1. A measuring unit that measures a distance between the display unit and a target user; A calculation unit that calculates a display size of a visual acuity test index in accordance with the measured separation distance; a display control unit that causes the indicator to be displayed on the display unit at the calculated display size; An information processing device comprising:

2. the calculation unit calculates a display size of the index according to a number of pixels of the display unit and a size of the display unit. The information processing device according to claim 1 .

3. An acquisition unit that acquires information indicating a size of the display unit from a user, The calculation unit calculates a display size of the index in accordance with the information acquired by the acquisition unit. The information processing device according to claim 2 .

4. The display control unit further causes an image for calculating the size of the display unit to be displayed on the display unit; the acquisition unit acquires information indicating a size of the image displayed on the display unit as information indicating a size of the display unit; the calculation unit calculates a display size of the indicator according to a number of pixels of the display unit and a size of the display unit calculated from information indicating the size of the display unit. The information processing device according to claim 3 .

5. A television receiver comprising the information processing device according to any one of claims 1 to 3.

6. Measuring a distance between a display unit and a target user; A step of calculating a display size of a visual acuity test index according to the measured separation distance; displaying the indicator on the display unit at the calculated display size; An information processing method comprising:

7. Computer, A measuring unit that measures a distance between the display unit and a target user; a calculation unit that calculates a display size of a visual acuity test index in accordance with the measured separation distance; a display control unit that causes the indicator to be displayed on the display unit at the calculated display size; A program that functions as a

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