JP3958958B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device, and more particularly to an electronic device that is included in a visual field measurement system that performs visual field measurement processing of an eye to be examined and that performs the main part of the visual field measurement processing based on control from an external control terminal.
[0002]
[Prior art]
Medical devices have been digitized more than ever, and ophthalmic examination devices such as perimeters are no exception. The inspection of the perimeter is a method of illuminating a spot in the visual field dome or displaying an LED, etc., and recording the subject's response by operating the response switch etc. However, in recent years, an automatic perimeter has been known in which a target presentation pattern and order are programmed in advance and the target presentation and response input can be recorded (semi-) automatically.
[0003]
[Problems to be solved by the invention]
Many automatic perimeters as conventional electronic devices are dedicated devices incorporating a control device for inspection, and have a problem that the structure is complicated and the manufacturing cost is high.
[0004]
As one of the measures for providing an automatic perimeter easily and inexpensively, a configuration in which a PC (personal computer) that has been remarkably widespread in recent years is used and used as a control unit of the automatic perimeter and a filing device for inspection data can be considered. The hardware part of the perimeter is relatively simple as an ophthalmic examination apparatus, and means such as an interface with a PC and USB (Universal Serial Bus) are sufficient and can be used easily. Furthermore, since a PC already exists in a medical site that requires this kind of inspection and can be easily used, it is considered that an inspection system can be provided at low cost by configuring an automatic perimeter using the PC.
[0005]
A problem in such an information processing system using a PC is a power supply problem.
[0006]
Normally, in this type of information processing system, the PC, the printer, the monitor, and other peripheral devices have separate power supplies, and it is necessary to turn on / off the power independently by each power switch. Therefore, the user's power management is troublesome, and it is often the case that the system cannot be operated normally due to forgetting to turn on a certain device constituting the system, or the power is forgotten to be turned off. Such a problem is not limited to medical devices such as an automatic perimeter, but is common to electronic devices that operate with an external control terminal.
[0007]
Note that there are standards that should be satisfied with regard to leakage current and insulation in accordance with laws and regulations such as the Electrical Equipment Control Law, and power supplies for medical equipment such as a perimeter are not included in JIS T1001. Standards are established. Therefore, as a matter of course, in an electronic device such as an automatic perimeter, an insulation transformer must be inserted on the input side of the commercial power supply in order to prevent leakage current or satisfy a predetermined insulation standard.
[0008]
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, to easily manage the power supply of the entire visual field measurement system composed of a control terminal and an electronic device, and to appropriately operate the entire visual field measurement system. .
[0009]
[Means for Solving the Problems]
In order to solve the above-described problem, according to the present invention, an electronic apparatus that is included in a visual field measurement system that performs visual field measurement processing of an eye to be examined and that executes the main part of the visual field measurement processing based on control from an external control terminal A control unit for operating the entire visual field measurement system as an automatic perimeter by performing visual target presentation control for visual field measurement based on the control from the control terminal as a main part of the visual field measurement process, and a commercial power supply A service outlet for supplying the input commercial power supply voltage to the control terminal; and a current detection circuit for detecting a current value fed from the service outlet to the control terminal, and detected via the current detection circuit. A configuration is adopted in which the power supply to the power supply unit that operates the control unit is controlled according to the current value to be controlled .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 shows the overall configuration of an automatic perimeter system according to the present invention. The automatic perimeter system shown in FIG. 1 includes a perimeter dome 20 in which the hardware portion of the automatic perimeter is independent, and a PC 10 that executes a visual field measurement program and functions as a filing device.
[0012]
The PC 10 has a general configuration including a mouse 11, a display 15, a keyboard 16, and the like. FIG. 1 illustrates a notebook personal computer, but it may be a desktop. A printer 12 and a monitor 13 are connected to the PC 10 as peripheral devices via a predetermined interface. These peripheral devices are mainly for information output, but other devices may be connected as necessary. The PC 10 has a network interface (not shown) such as a modem or Ethernet (trade name), and can exchange / share measurement data with other devices via the network interface.
[0013]
FIG. 2 shows the configuration of the perimeter dome 20 in detail. A hemispherical (about 300 mmφ) internal dome 23 is provided in the casing 20 a of the perimeter dome 20, and an LED 36 and a CCD camera 39 are disposed on the inner surface of the internal dome 23.
[0014]
A plurality of LEDs 36 (about 100 to 200 in accordance with visual field inspection specifications) are arranged at predetermined positions in order to present a visual target (white color) for visual field measurement, and some of them are directed to fixation direction. Also used as a fixation target (red). FIG. 4 shows a mounted state of the LED 36. As shown in the figure, the LED 36 (about 3 mmφ) is fixed in an opening provided in the dome base 38, and a diffusion sheet 37 covers it.
[0015]
Similarly, as shown in FIG. 5, the CCD camera 39 is also arranged so as to face the subject (eye) from the opening of the dome base 38. In the case of the CCD camera 39, the diffusion sheet 37 is illustrated. It is cut out like this.
[0016]
Referring back to FIG. 2, a background luminance control LED 24 that illuminates the visual field of the internal dome 23 is disposed inside the periphery of the opening 20 b on the front surface of the housing 20 a of the perimeter dome 20. A plurality of LEDs 24 are provided to uniformly control the inner surface of the inner dome 23 to a predetermined background luminance.
[0017]
Further, a forehead support 25 for positioning the face of the subject 2 facing the opening 20b and a chin stand 26 are arranged. The position of the chin stand 26 can be adjusted up and down and left and right by means of knobs 28 (left and right movement) and 29 (up and down movement). The knobs 28 (left and right movement) and 29 (up and down movement) and the chin stand 26 are interlocked with the knobs 28 and 29 by a motor (solenoid) drive mechanism or a pure mechanical mechanism. It should be noted that it can be detected by a limit switch or the like whether the chin table 26 is in a position to measure the left or right of the eye to be examined.
[0018]
In addition, a correction lens frame 27 is provided facing the opening 20b in order to insert the correction lens in front of the eye to be examined. A correction lens for diopter adjustment can be attached to the correction lens frame 27. Whether or not the correction lens frame 27 pops up in front of the eye to be examined can be controlled by an operation mechanism (not shown), and whether or not the correction lens is inserted can be detected by a limit switch or the like.
[0019]
In the visual field measurement, the subject 2 operates the response switch 30 to indicate whether or not the visual target is visible. In this embodiment, the response switch 30 is pulled out from the housing 20a of the perimeter dome 20 via a cable, but of course may be fixed to the front surface of the housing 20a or the like, as shown in FIG. It may be connected to the PC 10 side.
[0020]
The interface method between the PC 10 and the perimeter dome 20 is arbitrary, but in this embodiment, USB is used. In FIG. 2, reference numeral 51 denotes a USB connector for connecting to the PC 10 (or another device). The number of USB connectors 51 is arbitrary (two are provided in FIG. 2).
[0021]
The feature of the automatic perimeter system of this embodiment is that the automatic perimeter, which has been a dedicated device integrated in the past, is separated into a perimeter dome 20 that is a main part of the automatic perimeter and a PC 10 as a control terminal. The operation is controlled, and service outlets 21 and 22 for supplying AC power to the PC 10 (or peripheral devices such as the printer 12 and the monitor 13) are further provided in the perimeter dome 20.
[0022]
That is, in this embodiment, the perimeter dome 20 is part of an automatic perimeter system, and is the core hardware for performing the main information processing of the perimeter measurement. It is characterized in that AC power is supplied to the PC 10 serving as a control terminal provided with service outlets 21 and 22 and controlling software for controlling the perimeter dome 20.
[0023]
Further, as will be described later, power is supplied from the perimeter dome 20 and the service outlets 21 and 22 in accordance with the power supply state to the PC 10 as a control terminal on which software for controlling the perimeter dome 20 is mounted or under the control of the PC 10. Another feature is that the AC output to the receiving device can be controlled.
[0024]
That is, the service outlet 21 in FIGS. 1 and 2 is a main service outlet that supplies the PC 10 with the AC voltage input from the commercial AC power supply via the plug 31. The service outlets 22 are provided as service outlets for supplying power to peripheral devices such as the printer 12 and the monitor 13 (in FIG. 1 and FIG. 2, two service outlets 22 are provided, but the number is arbitrary. ).
[0025]
FIG. 3 shows a configuration example around the power source of the perimeter dome 20. In FIG. 3, the inside of the broken line is an AC power system circuit provided in the perimeter dome 20, and commercial AC input (AC 100 V: voltage is arbitrary) input from the plug 31 is first input to the insulation transformer 32. . The secondary line of the insulating transformer 32 is connected to the control unit 34 of the perimeter dome 20 that controls the lighting of the LEDs for the target and the background, and is connected to the service outlets 21 and 22. , 22 is used to supply power to the PC 10 (the AC adapter 14), the printer 12, and the monitor 13. Power supply to the control unit 34 and the service outlet 22 is performed via a relay 33 described later.
[0026]
The insulating transformer 32 is for cutting off leakage current and noise of medical equipment specified in JIS T1001 and the like, and its transformation ratio is 1: 1 (however, the transformation ratio is arbitrary if necessary). The current capacity of the insulating transformer 32 is sufficient to supply power to the PC 10 and peripheral devices connected to the service outlets 21 and 22. By providing the insulating transformer 32 in this manner, the specifications of the entire power source of the automatic perimeter system can be unified so as to satisfy the leakage current and noise conditions required for the medical device.
[0027]
Further, in the configuration of FIG. 3, the power supply to the peripheral device via the control unit 34 and the service outlets 21 and 22 of the perimeter dome 20 can be controlled by the power supply state to the PC 10 side.
[0028]
That is, a current detection circuit 35 is inserted in a line toward the service outlet 21 that supplies power to the PC 10, and the relay 33 is opened and closed according to the current detection value of the current detection circuit 35.
[0029]
The current detection circuit 35 controls the output terminal A according to the power supply state to the PC 10. That is, if a current that allows the PC 10 to normally operate is flowing toward the service outlet 21, the terminals B1 and B2 of the relay 33 and the terminals C1 and C2 are closed via the output terminal A, and the main power supply of the PC 10 is shut off. When the output to the service outlet 21 is lowered (or suspended), control is performed so that the terminals B1 and B2 of the relay 33 and the terminals C1 and C2 are opened via the output terminal A. Such an operation can be performed by, for example, comparing the detected value with a current detecting means for detecting the current of the line to the service outlet 21.
[0030]
With such a configuration, the entire system can be turned on when the main power of the PC 10 as a control terminal for controlling the automatic perimeter system is turned on, and the entire system can be turned off when the main power of the PC 10 is turned off. it can.
[0031]
Note that the detection timing of the current detection circuit 35 and the operation timing of the relay 33 do not have to be completely synchronized, and control may be performed so as to delay the operation timing of the relay 33 via a delay circuit or the like (for example, (When the main system is turned off in response to the main power cut-off of the PC 10).
[0032]
6 and 7 show different configuration examples of the control unit 34 of the perimeter dome 20, respectively. In FIG. 6 and FIG. 7, the aforementioned target 36 and fixation target presenting LED 36 are connected to the CPU 41 via the LED driving unit 45 and the LED control unit 46.
[0033]
The CPU 41 communicates with the PC 10 via a USB 47 (or 48), which will be described later, and controls the LED 36 via the LED drive unit 45 and the LED control unit 46 based on a command from the PC 10 to display a target and a fixation target. Control. A control program for the CPU 41 is stored in the ROM 44.
[0034]
The ROM 44 stores correction data for correcting the lighting luminance of the LEDs, that is, the background luminance control LED 24 or the visual field measurement LED 36 so as to satisfy the visual field measurement standard. The brightness correction data is created by actually measuring the brightness of each LED before shipment and stored in the ROM 44 (or a rewritable memory element such as an EEPROM so that it can be adjusted later).
[0035]
Further, the CPU 41 transmits an image photographed by a CCD camera 39 or a USB camera 50 described later to the PC 10 via the USB 47 (or 48) at an appropriate frame rate. The PC 10 displays an image received via the USB 47 (or 48) on the display 15, and the examiner can monitor the fixation state of the eye to be inspected with this image (15a in FIGS. 6 and 7).
[0036]
Further, the CPU 41 is connected to a jaw switch 42 for detecting the position (left and right) of the jaw table and a correction lens switch 43 for detecting whether or not the aforementioned correction lens is inserted via an I / O port (not shown). The CPU 41 can detect the state of these switches.
[0037]
The response switch 30 is connected to the CPU 41 in the same manner as the switches 42 and 43 in FIG. 6, but is connected to a predetermined interface (for example, USB) of the PC 10 through the conversion box 49 in FIG.
[0038]
In FIG. 6, reference numeral 39 denotes the above-described CCD camera. The CCD camera 39 is connected to the I / O port of the CPU 41 via the A / D conversion circuit 39a.
[0039]
On the other hand, in FIG. 7, a USB camera 50 is used instead of the CCD camera 39. At present, products that can be connected to a USB bus are provided at low cost for USB cameras, and the system is cheaper than connecting a CCD camera 39 as a camera unit via an A / D conversion circuit 39a as shown in FIG. Can be configured.
[0040]
The interface with the PC 10 is USB (2.0) 47 in FIG. 6, but in FIG. 7, the PC 10 and the USB camera 50 are connected via the USB (2.0) hub 48, and the CPU 41 in the control unit 34. And USB (2.0) 47 are connected via USB (1.1). With the configuration as shown in FIG. 7, even when the compatible USB version is limited by the CPU, the peripheral chipset type, and the like, the USB version can be matched and the devices and circuit blocks can be connected.
[0041]
6 and 7, reference numeral 52 denotes a power supply unit that supplies power to each circuit block. The power supply unit 52 supplies a DC voltage obtained by rectifying, smoothing, and stabilizing the commercial AC input from the terminal C2 of the relay 33 to each circuit block.
[0042]
FIG. 8 shows a flow of information processing executed by the CPU 41 of the control unit 34 of the perimeter dome 20.
[0043]
Step S1 in FIG. 8 is a step of determining whether or not power supply from the relay 33 to the power supply unit 52 has been started. This step S1 is simply a process for starting power supply from the relay 33 to the power supply unit 52 in the configuration of FIG. 3, but based on the USB standard and ACPI (Advanced Configuration and Power Interface) standard described later, the perimeter dome 20 as a peripheral device. In the configuration to suspend / resume the power, the CPU 41 operated by the standby power source or the peripheral chip set detects the start of power supply.
[0044]
In step S2, each part is initialized, the above-described LED brightness correction data stored in the ROM 44 is read, and transmitted to the PC 10 based on a predetermined protocol determined in advance in step S3.
[0045]
After step S4, communication with the PC 10 is started. In step S4, a command is waited for from the PC 10, and when a command is received from the PC 10, a visual field measurement process is performed by executing a process corresponding to the command received in step S5. In parallel with this, an image acquired by the CCD camera 39 or the USB camera 50 is transmitted to the PC 10 at a predetermined frame rate.
[0046]
The operation stop in step S6 is performed by stopping the power supply from the relay 33 to the power supply unit 52 in the configuration of FIG. 3, but the configuration in which the perimeter dome 20 as a peripheral device is suspended / resume based on the USB standard and ACPI standard described later. Is performed by stopping the power supply to the other constituent circuits excluding the members necessary for the resume under the control of the CPU 41 or its chip set.
[0047]
By configuring the perimeter dome 20 as an electronic device operating together with an external control terminal as described above, the power supply of the automatic perimeter system including the PC 10 and the perimeter dome 20 can be easily managed.
[0048]
That is, since power can be supplied to the PC 10 (or other peripheral device) from the perimeter dome 20 side, the power cable of the entire automatic perimeter system can be neatly organized without using an extra table tap or the like.
[0049]
Further, as shown in FIG. 3, the AC power source through the isolation transformer 32 can be supplied to the PC 10 (or other peripheral device), so that it is not necessary to purchase a single isolation transformer separately, and the entire automatic perimeter system is not required. The power supply can be easily and appropriately unified, and there is no risk of affecting other devices.
[0050]
Further, as shown in FIG. 3, the power management of the automatic perimeter system becomes very easy by linking the power supply of the PC 10 and the perimeter dome 20 (or other peripheral devices). Can prevent forgetting to turn off the power. The interlocking means as shown in FIG. 3 can be easily implemented by a current detection circuit and a relay (or a timer if necessary).
[0051]
Further, as shown in FIG. 8, luminance correction data (target presentation luminance correction data) stored in advance in the ROM 44 is transmitted from the perimeter dome 20 in response to the power activation, and the PC 10 performs LED luminance based on the luminance correction data. By transmitting a command for setting, the lighting brightness of the background luminance control LED 24 or the visual field measurement LED 36 can be reliably controlled in accordance with the visual field measurement reference.
[0052]
In particular, in the present invention, the perimeter dome 20 forms a part of an automatic perimeter system and is the main hardware for performing main information processing for visual field measurement. have.
[0053]
Although the service outlet itself has been known for a long time, a structure in which a service outlet is provided on the peripheral device side to supply power to the control terminal is not known. Therefore, the present invention has a great change in concept in that a basic configuration in which a service outlet is provided on the peripheral device side to supply power to the control terminal is adopted.
[0054]
In order to link the power supply of the PC 10 as a control terminal and the perimeter dome 20 (or other peripheral device) operating as a main part of the automatic perimeter system under the control of the PC 10, as shown in FIG. There are various methods without being limited to the configuration.
[0055]
For example, the USB standard and ACPI standard include provisions to suspend / resume peripheral devices, and the perimeter dome 20 (or other peripheral device) is suspended from the PC 10 via USB based on such an interface. / You may make it resume. For example, the perimeter dome 20 (or another peripheral device) is automatically suspended via USB when the automatic visual field measurement program on the PC 10 side ends, and resumed when the automatic visual field measurement program on the PC 10 side is started. You may make it make it. As a result, the power supply of the entire system can be linked and controlled more efficiently.
[0056]
【The invention's effect】
As is apparent from the above description, according to the present invention, an electronic device that is included in a visual field measurement system that performs a visual field measurement process for an eye to be examined, and that executes the main part of the visual field measurement process based on control from an external control terminal. In the apparatus, as a main part of the visual field measurement processing, a control unit that operates the entire visual field measurement system as an automatic perimeter by performing a target presentation control for visual field measurement based on control from the control terminal, and a commercial power source A service outlet that supplies a commercial power supply voltage input from the service terminal to the control terminal, and a current detection circuit that detects a current value supplied from the service outlet to the control terminal, and is detected via the current detection circuit. because it uses a configuration for controlling the power supply to the power supply unit for operating the control unit in response to the current value, the control terminal and the electronic Vessels easily performed power management of the entire visual field measurement system constituted by the entire field measuring system can properly operate, excellent effect can be obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing the overall configuration of an automatic perimeter adopting the present invention.
FIG. 2 is an explanatory view showing a configuration of the perimeter dome of FIG. 1;
3 is an explanatory diagram showing a configuration around the power source of the perimeter dome of FIG. 1. FIG.
4 is an explanatory diagram showing a configuration of a visual field dome of the perimeter dome of FIG. 1. FIG.
5 is an explanatory view showing a configuration of a visual field dome of the perimeter dome of FIG. 1. FIG.
6 is an explanatory diagram showing a configuration of a control system of the automatic perimeter of FIG. 1. FIG.
7 is an explanatory diagram showing a different configuration of the control system of the automatic perimeter of FIG. 1. FIG.
8 is an explanatory diagram showing an information processing procedure executed by the CPU of FIG. 6 or FIG.
[Explanation of symbols]
1 examiner 2 examinee 10 PC
11 Mouse 12 Printer 13 Monitor 15 Display 16 Keyboard 20 Perimeter dome 20b Openings 21, 22 Service outlet 23 Internal dome 24 LED (for background brightness control)
25 Forehead 26 Chin stand 27 Correction lens frame 30 Response switch 31 Plug 32 Insulation transformer 33 Relay 35 Current detection circuit 36 LED (for target presentation)
38 Dome base 39 CCD camera 41 CPU
42 Chindai switch 43 Correction lens switch 44 ROM
45 LED drive unit 46 LED control unit 47 USB (2.0)
51 USB connector 52 Power supply

Claims (5)

In the visual field measurement system that performs the visual field measurement process of the eye to be examined, in an electronic device that executes the main part of the visual field measurement process based on control from an external control terminal,
A control unit for operating the entire visual field measurement system as an automatic perimeter by performing visual target presentation control for visual field measurement based on the control from the control terminal as a main part of the visual field measurement process;
A service outlet for supplying a commercial power supply voltage input from a commercial power supply to the control terminal ;
A current detection circuit for detecting a current value fed from the service outlet to the control terminal;
An electronic apparatus that controls power supply to a power supply unit that operates the control unit in accordance with a current value detected through the current detection circuit .   2. The electronic apparatus according to claim 1, further comprising a service outlet that supplies a commercial power supply voltage input from a commercial power supply to peripheral devices constituting the visual field measurement system.   The electronic apparatus according to claim 1, wherein an insulating transformer is provided between the commercial power source and the service outlet to insulate the commercial power source and the service outlet. Claims, characterized in that to control the commercial power source voltage output of the the control of the control terminal power supply to the power supply unit, to the service outlet to supply power to the service outlet, and the peripheral device supplies power to the control terminal Item 3. The electronic device according to Item 1 or 2.   Storage means for storing target correction luminance correction data for visual field measurement is transmitted to the control terminal in response to the start of power supply to the power supply unit. The electronic device according to claim 4.

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