TW201907860A - Vision test device and vision test method capable of automatically adjusting size of optotype including a display screen, a database module, a distance measuring module, a calculating module, and a control module - Google Patents

Abstract

A vision inspecting device capable of automatically adjusting the size of an optotype, which is provided in a portable mobile electronic device and includes a display screen; a database module configured to store optotypes for performing vision test; a distance measuring module configured to measure the distance between the display screen and a user; a calculating module, which calculates the size of the optotype supposed to be displayed according to the distance measured by the distance measuring module; and a control module, which displays the optotype based on the size calculated by the calculating module on the display screen. The present invention further provides a vision test method.

Description

Vision detecting device and vision detecting method capable of automatically adjusting visual target size

The invention relates to a vision detecting device, in particular to a vision detecting device and method capable of automatically adjusting the size of an optotype.

As the saying goes, "The eyes are the window of the soul." It is obvious that vision is one of the important indicators of the health of the Chinese people, and it is also an indispensable item in various health checks. Through visual acuity examination, we can understand whether our eyes have eye diseases such as myopia, hyperopia or astigmatism, and then according to the results of the examination, the glasses with corresponding degrees can be prepared. In addition to making the patients more clear, the degree can be avoided.

Visual inspection is usually carried out by means of an eye chart that has a large number of E-shaped or C-shaped optotypes arranged in a large to small arrangement. The size of each optotype and the width of the notch, as well as the detection distance of the subject, have a standard specification. The results detected under this standard specification are the public credit values available for reference.

In order to make the inspection process conform to the standard specification, the traditional visual inspection is carried out in a small room with a light box on the wall, which is painted with a standard size of most E-shaped or C-shaped visual indicators, by an auxiliary tester. Several of the optotypes are randomly assigned, and the subject is outside the standard distance to answer the direction of the notch of the optotype. This method of inspection requires the subject to go to a specific place that meets the standard specifications, and requires another person to assist in the inspection. It takes time and manpower, and cannot be checked anytime and anywhere.

While modern portable mobile electronic devices are popular, some applications (APPs) can display visual indicators on the screen at random, allowing users to perform visual inspections anytime, anywhere. Since the distance between the user's handheld mobile device and the mobile device is only about 40 to 50 cm, the application converts the target size according to the distance and displays the converted size on the screen.俾 The user can hold the mobile electronic device and maintain a flat check about 40 to 50 cm in front of the eye to obtain a correct inspection result. However, the visual scale displayed by such an application on the screen is a fixed size. If the user does not check the viewing distance of 40 to 50 cm, the result will be inaccurate and lack of reference value. On the other hand, it is necessary to maintain the posture in which the mobile electronic device is lifted in front of the eyes when performing the detection, which is not easy for the user, and thus there is still inconvenience in use.

In view of this, how to improve the above problems is the primary problem to be solved by the present invention.

The main object of the present invention is to provide a vision detecting device and a visual acuity detecting method capable of automatically adjusting the size of an optotype, and the visual target can automatically adjust the display size according to the distance between the visual disc and the user, so that the user can self-service at any time and any place. Measure your eyesight with ease of use.

For the purpose of the foregoing, the present invention provides a visual acuity detecting device capable of automatically adjusting an optotype size, comprising: a display screen; a database module for storing an optotype for performing an eyesight inspection; and a ranging module For measuring the distance between the display screen and the user; a computing module, which calculates the size that the visual target should display according to the distance measured by the ranging module; a control module, which The visual standard is displayed on the display screen according to the calculated size of the calculation module.

Further, the computing module can further adjust the resolution or pixels required by the optotype according to the size that the optotype should display after calculation.

In an embodiment, an interactive module is further included for receiving an operation signal from the user and further linking the control module.

In an embodiment, a network module is further included for exchanging or transmitting information with the outside.

In one embodiment, the ranging module includes a lens that can be used for ranging by using contrast focusing or phase focusing.

In one embodiment, the ranging module includes a direction sensor that can perform a ranger using a trigonometric function.

In one embodiment, the ranging module includes a laser or infrared sensor that can be used for distance measurement using low power laser or infrared reflection.

In one embodiment, the ranging module includes an audio transmitter/receiver that can perform a range finder using a sonar.

The invention further provides a vision detecting method capable of automatically adjusting the size of an optotype, which comprises: storing a visual indicator for performing visual inspection using a database module; displaying an optotype for performing visual inspection using a display screen; using a ranging The module measures the distance between the display screen and the user; uses a calculation module to calculate the size that the visual target should display according to the distance measured by the distance measuring module; The calculated size of the computing module is displayed on the display screen.

In an embodiment, the method further includes: using the calculation module to adjust a resolution or a pixel required for the optotype according to a size that the optotype should display after calculation.

In an embodiment, the method further includes: receiving an operation signal from the user by using an interaction module, and further linking the control module.

In an embodiment, the method further includes: exchanging or transmitting information with the external network using a network module.

In one embodiment, the ranging module uses a lens to perform ranging with contrast focusing or phase focusing.

In an embodiment, the ranging module uses a direction sensor to perform ranging with a trigonometric function.

In one embodiment, the ranging module uses a laser or infrared sensor to measure with low power laser or infrared reflection.

In one embodiment, the ranging module uses an audio transmitter/receiver to perform ranging in a sonar manner.

The above objects and advantages of the present invention will be readily understood from the following detailed description of the embodiments of the invention.

Referring to FIG. 1 , a first embodiment of a vision detecting device capable of automatically adjusting an optotype is provided, which includes a display screen 1 , a database module 2 , and a ranging module 3 . a computing module 4 and a control module 5; the invention can be a stand-alone device or an application program in a portable or fixed mobile electronic device, such as a smart phone or a tablet computer , a laptop or a desktop computer. The database module 2 stores an optotype for performing an eye examination, including a common E-shaped visual object or a C-shaped visual target, for the user to indicate the direction of the notch to determine the detection result, and the visual target includes various levels of vision. The dimensions of the evaluation are tested and each has a base value that conforms to the standard specifications.

The distance measuring module 3 is configured to measure the distance between the display screen 1 and the user, and can achieve the purpose of measuring the distance by using different structures to perform different ranging methods. For example, in the first embodiment, the ranging module 3 can be a lens 31. After the lens 31 faces the target, the target can be subjected to contrast focusing or phase focusing, which can be obtained according to the lens imaging principle. The distance of the target. In the second embodiment, the ranging module 3 can be a direction sensor 32, which can sense the height of the mobile electronic device and the angle between the mobile electronic device and the target, and is calculated according to a trigonometric function. The distance between each other.

The third embodiment of the ranging module 3 is a laser or infrared sensor 33, which can emit a low-power laser or infrared light to the target and receive the laser reflected by the target. Or infrared rays to calculate the distance between each other. Further, the fourth embodiment of the ranging module 3 is an audio transmitter/receiver 34 that applies an active sonar principle to emit a sound wave to the target and performs ranging by receiving the reflected sound wave.

After the distance measuring module 3 measures the distance between the display screen 1 and the user according to the foregoing various manners, the computing module 4 can obtain a conversion ratio according to the distance according to the standard specification; In the embodiment, the conversion formula is as follows: Where VA represents the evaluation of each level of vision detection, x is the visual target size (unit: mm), and l is the distance (unit: m) between the display screen 1 and the user measured by the distance measuring module, and the control The module 5 extracts the optotype in the database module 2, and calculates the size of the optotype to be displayed on the display screen 1 according to the conversion ratio, and then displays the optotype on the display screen with the adjusted size. 1 on.

Further, the computing module can further adjust the resolution or pixel required by the target according to the size of the target to be displayed after the calculation, because the upper limit of the resolution supported by the screen 1 should be displayed. For example, the size of the original image file of the target is 300 pixels x 300 pixels, the resolution is 300 dpi, and the size of the target to be displayed after the conversion ratio is 1 square centimeter, the calculation module can choose to maintain The same pixel is converted to a high resolution of 762 dpi; it is also possible to maintain the same resolution and convert the target to a size of 118 pixels x 118 pixels. According to this, the same display effect can still be obtained on different displays.

With the above configuration, as shown in the second and third figures, the user 8 does not need to hold the mobile electronic device 9 to maintain the posture in front of the eyes, but can be held in any posture, and The distance between the mobile electronic device 9 and the user 8 changes, and the distance measuring module instantly measures the distance so that the computing module calculates an instantaneous conversion ratio, and the control module immediately converts the ratio according to the conversion ratio. Adjust the size of the optotype displayed on the display screen 1. As shown in FIG. 2, when the mobile electronic device 9 is closer to the user 8, the visual target displayed on the display screen 1 is smaller, and when the mobile electronic device 9 is used as shown in FIG. When the 8 is farther away, the visual target is adjusted to become larger, so that the detection result conforms to the standard specification and has a credible reference value.

The invention has the advantages that the user can perform the visual acuity detection anytime and anywhere, and can be completed by using the mobile electronic device, and no need to make an appointment to go to a specific place; on the other hand, the visual target displayed on the display screen is from the The database module is randomly selected and does not have a sequence, which prevents the user from knowing the answer through memory and ensures the accuracy of the test result.

FIG. 4 is a second embodiment of the visual acuity detecting device of the present invention. The present embodiment further includes an interactive module 6 for receiving an operation signal from a user based on the first embodiment. The control module 5 is further linked. In the embodiment, as shown in FIG. 5, the display screen 1 is a touch screen, and the interactive module 6 can display a plurality of operation buttons 61 on the display screen 1, respectively indicating the direction of the target mark gap. When the user selects the answer he wants, the corresponding button 61 is pressed, and after receiving the operation message of the user, the interaction module 6 can return the control module 5 and call an interactive screen, such as answering or answering an error. Screen, and notifying the control module 5 to display the next visual target to continue the visual acuity detection, wherein the next visual target can be determined according to whether the user's answer is correct or not, for example, in the case where the user answers correctly, The next optotype will display the higher-level optotype of the evaluation level, and in the case where the user answers the error, the next optotype will display the lower-level optotype.

FIG. 6 is a third embodiment of the visual acuity detecting device of the present invention. Based on the foregoing second embodiment, the present embodiment further adds a network module 7 for exchanging or transmitting information with the outside. For example, uploading and publishing test results to an external server, or downloading a visual image from an external database.

Furthermore, the present invention further provides a vision detection method capable of automatically adjusting the size of an optotype, as shown in FIG. 7, which includes: storing a visual indicator for performing an eye examination using a database module; and implementing the display using a display screen The visual inspection of the visual inspection; using a distance measuring module to measure the distance between the display screen and the user; using a computing module to calculate the size that the visual standard should display according to the distance measured by the distance measuring module; Using the computing module to adjust the resolution or pixel required by the visual label according to the size that the visual label should display; using a control module to display the visual standard according to the calculated size of the computing module on the display screen Up; using an interactive module to receive an operation signal from the user, and then linking the control module; using a network module to exchange or transmit information with the outside.

In the above-mentioned vision detecting method, the ranging module can achieve different measuring distances by different structures to achieve the purpose of measuring distance. For example, using a lens, the distance between the target and the target is obtained according to the principle of lens imaging by contrast focusing or phase focusing; or using a direction sensor to sense the height of the mobile electronic device and the mobile electronic device and The angle between the targets, measured by the trigonometric function, or by using a laser or infrared sensor, by transmitting a low-power laser or infrared light to the target, and receiving the reflected back from the target. Laser or infrared rays are used to calculate the distance between each other; or an audio transmitter/receiver is used to transmit a sound wave to the target and receive the reflected sound wave for ranging.

After the distance measuring module measures the distance, the calculation module performs a comparison conversion procedure between the distance and the standard specification, thereby obtaining a conversion ratio of the adjusted visual target size, and the control module is used in the database module. When the target is extracted, the size of the target displayed on the display screen is adjusted according to the conversion ratio. According to this, regardless of the distance between the user and the user caused by the gesture of the mobile electronic device, the distance measuring module can instantly detect the distance and make the size of the target displayed on the display screen instantaneous. The formation of changes, in accordance with the standard specification of vision testing, makes the test results more accurate and has a credible reference value.

However, the above description of the embodiments is merely illustrative of the invention and is not intended to limit the invention, and the replacement of equivalent elements is still within the scope of the invention.

In summary, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objectives and is in accordance with the provisions of the Patent Law.

1‧‧‧display screen

2‧‧‧Database module

3‧‧‧Ranging module

31‧‧‧ lens

32‧‧‧ Directional Sensors

33‧‧‧Laser or infrared sensor

34‧‧‧Audio Transmitter/Receiver

4‧‧‧ Calculation Module

5‧‧‧Control Module

6‧‧‧Interactive module

61‧‧‧ button

7‧‧‧Network Module

8‧‧‧Users

9‧‧‧Mobile electronic devices

1 is a block diagram showing the first embodiment of the visual acuity detecting device of the present invention; FIGS. 2 and 3 are schematic diagrams showing the state of use of the first embodiment of the visual acuity detecting device of the present invention; and FIG. 4 is a view showing the visual acuity detecting device of the present invention; 2 is a schematic block diagram of a second embodiment of the vision detecting device of the present invention; FIG. 6 is a schematic block diagram of a third embodiment of the visual acuity detecting device of the present invention; It is a block diagram of the vision detecting method of the present invention.

Claims (16)

A vision detecting device capable of automatically adjusting the size of an optotype, comprising: a display screen; a database module for storing an optotype for performing visual inspection; and a ranging module for measuring the display screen and a distance between the users; a computing module that calculates the size that the visual standard should display according to the distance measured by the ranging module; a control module that calculates the visual standard according to the computing module The size is displayed on the display screen. The vision detecting device capable of automatically adjusting the size of the optotype according to claim 1, wherein the computing module can further adjust the resolution or pixels required by the optotype according to the size that the optotype should display after calculation. The visual acuity detecting device capable of automatically adjusting the size of the optotype according to claim 1, further comprising an interactive module for receiving an operation signal from the user and further linking the control module. The visual acuity detecting device capable of automatically adjusting the size of the optotype according to claim 1, further comprising a network module for exchanging or transmitting information with the outside. The vision detecting device capable of automatically adjusting the size of the optotype according to claim 1, wherein the ranging module comprises a lens, and the lens can be used for ranging by using contrast focusing or phase focusing. The vision detecting device capable of automatically adjusting the size of the optotype according to claim 1, wherein the ranging module comprises a direction sensor, and the direction sensor can perform the distance measuring by using a trigonometric function. The vision detecting device capable of automatically adjusting the size of the optotype according to claim 1, wherein the ranging module comprises a laser or infrared sensor, and the laser or infrared sensor can use low power laser or infrared reflection Perform range finder. The vision detecting device capable of automatically adjusting the size of the optotype according to claim 1, wherein the ranging module comprises an audio transmitter/receiver capable of performing ranging by using a sonar method. A vision detecting method capable of automatically adjusting an optotype size, comprising: using a database module to store an optotype for performing an eyesight inspection; using a display screen to display an optotype for performing an eyesight inspection; using a ranging module to measure The distance between the display screen and the user is calculated by using a calculation module according to the distance measured by the distance measuring module; and the control module is used according to the calculation module by using a control module The calculated size is displayed on the display screen. The method for detecting visual acuity that automatically adjusts the size of the optotype according to claim 9, further comprising: adjusting the resolution or pixels required by the computing module according to the size that the visual standard should display after the calculation. The method for detecting visual acuity that automatically adjusts the size of the optotype according to claim 9, further comprising: receiving an operation signal from the user by using an interactive module, and further linking the control module. The method for detecting visual acuity that automatically adjusts the size of the optotype according to claim 9, further comprising: exchanging or transmitting information with the outside using a network module. The vision detecting method capable of automatically adjusting the size of the optotype according to claim 9, wherein the ranging module uses a lens to perform ranging with contrast focusing or phase focusing. The vision detecting method capable of automatically adjusting the size of the optotype according to claim 9, wherein the ranging module uses a directional sensor to perform ranging by a trigonometric function. The visual acuity detection method capable of automatically adjusting an optotype size according to claim 9, wherein the ranging module uses a laser or infrared sensor to perform ranging with low power laser or infrared reflection. The visual acuity detecting method capable of automatically adjusting the optotype size as described in claim 9, wherein the ranging module performs ranging in a sonar manner using an audio transmitter/receiver.