JPH06339463A - Visual acuity examinating device - Google Patents

Abstract

PURPOSE:To recognize target information using an at-hand display device so as to enhance reliability by providing the target display device near a wireless remote controller, in an optometer in which targets are switched from one to another using the remote controller. CONSTITUTION:A remote controller is provided with a target changeover switch 2 comprising a number of keys to select targets, and is also provided with a display 3 to display the kind of the target being displayed in a target display portion. When either of the keys of the target changeover switch 2 is pressed, a key signal corresponding to the number of the key is converted by a microcomputer circuit 10 into an infrared pulse signal, which is then transmitted to the target display portion from a transmitting circuit 11. The infrared pulse signal from the target display portion is received by a receiving circuit 12 and converted into a digital target signal, and target information is decoded by the microcomputer circuit 10 according to the target signal and the decoding result is displayed in the display 3 via a display driver 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a visual acuity test apparatus for switching visual targets by a remote controller.

[0002]

2. Description of the Related Art The optotype configuration of a visual acuity test apparatus is determined from various characters and symbols in consideration of a country, an area, a user's request, etc. It has a simple structure. The manufacturer of the device must manufacture a visual acuity test device with a number of optotype configurations. By the way, in recent years, a computer control device has become the mainstream in the visual acuity test device, and in many of these devices, a remote controller is used to switch the visual target. The conventional remote controller transmits the key number of the remote controller to the optotype presenting device, and the optotype presenting device side presents the optotype corresponding to the key number. Met. With such a remote controller, even if the optotype configuration is different, it can be used as a controller simply by reattaching the panel seal. However, since the remote controller itself does not have the function of specifying the target,
Remote control of which index is currently being presented
It cannot be displayed on the LA side.

[0003]

In the case of the former general apparatus, the remote controller cannot be provided with a display function, and the inspector alternates between the remote controller and the optotype presenting surface. There is a drawback that you must proceed with the inspection while watching.

In view of the above-mentioned problems of the prior art, an object of the present invention is to provide a device for an examiner to confirm the presented optotype simply by looking at the remote controller, and to the remote control even if the optotype configuration changes. -To provide a visual acuity test device that does not require major changes to the controller.

[0005]

In order to solve the above problems, the visual acuity test apparatus of the present invention is characterized by having the following configuration. (1) An optotype presenting unit that divides a large number of optotypes into one or a plurality of optotypes and presents the optotype on a predetermined presentation plane; In a visual acuity test apparatus including a wireless remote controller for selecting an optotype, a wireless transmitting means provided in an optotype presenting section and a remote controller for receiving a signal of the transmitting means are provided in the remote controller. The receiving means, and storage means arranged in the optotype presenting section for storing optotype information to be notified to the inspector corresponding to the optotypes presented on the presentation surface,
Receiving by the same display code table stored in the optotype presenting section and the remote controller for converting the optotype information into a signal, and receiving means provided in the remote controller. It is characterized in that it has a decoding means for decoding the target information according to the display code table and a display means for displaying the target information decoded by the decoding means.

(2) The remote controller of (1) is provided with a transmitting means for transmitting an infrared signal and a receiving means for receiving the infrared signal, and the optotype presenting section receives the infrared signal. And transmitting means for transmitting an infrared signal.

(3) The display means of (1) has a liquid crystal display.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. The apparatus of the embodiment comprises a remote controller section and an optotype presenting section. Figure 1 shows remote controller 1
FIG. 2 is an external view of FIG. The switches in the figure are keyed for convenience.
Although the numbers are attached, actually, a panel seal indicating the type of the optotype is attached. Reference numeral 3 denotes a display, which displays the type of the presented optotype. Reference numeral 4 is a window for transmitting and receiving with the optotype presenting unit.

FIG. 2 is a block diagram of the electric system of the remote controller 1. The key is pressed when the target switch 2 is pressed.
The key signal corresponding to the number is detected and input to the microcomputer circuit 10. The microcomputer circuit 10 converts the key signal into an infrared pulse signal by the transmission circuit 11 and transmits the infrared pulse signal to the optotype presenting section. Reference numeral 12 is a receiving circuit, which receives the infrared pulse signal from the optotype presenting section and converts it into a digital optotype signal, and the converted optotype signal is inputted to the microcomputer circuit 10. The micro computer circuit 10 has a display code table (see FIG. 3) common to the optotype presenting section, and the optotype information sent from the optotype presenting section in accordance with the display code table is used. Decipher,
It is displayed on the display device 3 via the display driver 13. The display unit 3 is a liquid crystal display device for character display in which one pattern is composed of 5 × 7 segments, and it is desirable to secure 20 or more display characters.

FIG. 4 is a block diagram of the electrical system of the optotype presenting section. The optotype presenting unit of the present embodiment is a back illuminated type that illuminates the film on which the optotype is printed from behind,
It may be replaced with a projection type device or the like. Reference numeral 20 is a receiving circuit for the signal transmitted from the remote controller. The key signal received and processed by the receiving circuit 20 is input to the microcomputer circuit 21. The micro computer circuit 21 stores a table in which key signals, types of optotypes, and positions on the film position are associated with each other, and the micro computer circuit 21 stores a motor drive circuit 22. The optotype switching motor 23 is driven via this to move the film so that the optotype corresponding to the key signal is located on a predetermined presentation surface. Further, 24 is a film switching motor for operating the film for the mask, and 25 is a motor drive circuit.

The micro computer circuit 21 moves the film to present the target on a predetermined presentation surface, and at the same time, displays the target information on the display 3 so that the target information is displayed on the remote controller. To send. Indicator 3 for presenting target
Has been decided, and FIG. 5 shows an example thereof. The left side of FIG. 5 shows a presentation target, (a) is 1.2,
Kana optotypes of 1.5 and 2.0, (b) one horizontal line of optotypes, (c) one character optotype, and (d) astigmatism char of point group.
And the corresponding display contents are shown on the right side of each. The micro-computer circuit 21 has a display code table which is the same as the display code table (FIG. 3) of the remote controller, and the selected display contents are signaled according to the display code table. To do.

The code of the display code table is represented by a hexadecimal number and is selected by a code consisting of high order and low order. For example, the pattern "S" has a code number of 52H,
The pattern "A" has a code number of 60H (see FIG. 3). When the number of characters displayed on the display 3 is 20, 20 codes must be transmitted.

The display information converted into the code signal is converted into an infrared pulse signal by the transmission circuit 26 and transmitted to the remote controller. Since the pulse signal from the optotype presenting section is transmitted almost instantly after the transmission from the remote controller, if the position and range where the optical signal from the remote controller is transmittable, The controller can be received without any problem. 27 is a lamp for illuminating the film, and 28 is a lamp driver.

The above embodiment can be modified in various ways.
For example, a table proposed by the present applicant in Japanese Patent Application No. 3-185449 (invention title “target presenting device”) regarding a table in which the types of targets and the positions of the targets are associated with each other. By adding the table rewriting function, it is possible to easily change the optotype presenting unit with respect to the change of the optotype configuration, and it is possible to provide a more advantageous device.

[0015]

According to the visual acuity test apparatus of the present invention, the remote
Since the display device for the presented optotype is provided on the side of the controller, it is possible to confirm the optotype information with the display device at hand, and simply change the seal to be attached even when the configuration of the optotype is changed. A common remote controller can be used.

[0016]

[Brief description of drawings]

Fig. 1 External view of remote controller

FIG. 2 is a block diagram of an electric system of a remote controller.

[Fig. 3] Display code table

FIG. 4 is a block diagram of an electric system of an optotype presenting unit.

FIG. 5 is a relationship diagram between a presentation target and a display.

[Explanation of symbols]

 1 Remote Controller 2 Target Switch 3 Display 4 Window 10, 21 Microcomputer Circuit 11, 26 Transmission Circuit 12, 20 Reception Circuit

Claims (3)

[Claims] 1. An optotype presenting section for dividing a large number of optotypes into one or a plurality of optotype groups and presenting the set on a predetermined presenting plane, and an optotype presenting section placed on a position apart from the optotype presenting section. In a visual acuity test apparatus including a wireless remote controller for selecting a target to be presented, a wireless transmitter provided in a target presenting section and a remote controller for receiving a signal from the transmitter. And a storage unit arranged in the optotype presenting unit for storing optotype information to be notified to the inspector corresponding to the optotype presented on the presentation surface, The same display code table stored in the optotype presenting section and the remote controller for converting the target information into a signal, and received by receiving means provided in the remote controller. Decode the target information according to the display code table A visual acuity test apparatus comprising: a decoding means and a display means for displaying the optotype information decoded by the decoding means. 2. The remote controller of claim 1 is provided with a transmitting means for transmitting an infrared signal and a receiving means for receiving the infrared signal, and the optotype presenting section is provided with a receiving means for receiving the infrared signal. A visual acuity test apparatus comprising: a transmission means for transmitting an infrared signal. 3. The visual acuity test apparatus according to claim 1, wherein the display means has a liquid crystal display.