KR20130001644A - Apparatus and method for optimizing the image size of a display device - Google Patents

Abstract

PURPOSE: A display device for optimizing an image size and a method thereof are provided to supply a size of an image, a character or a number suitable for a user on a screen, thereby increasing user convenience. CONSTITUTION: A camera module(414) photographs a change of eyeballs. A sight measurement module(420) measures sight of a user by using an image provided from the camera module and an objective sight measurement method. A control unit(406) adjusts a size of the image displayed on a display unit based on a sight measurement value. A memory(422) stores a program for performing the objective sight measurement method. [Reference numerals] (402) RF module; (404) Base band processing unit; (406) Control unit; (408) Codec; (414) Camera module; (416) Key input unit; (418) Display unit; (420) Sight measurement module; (422) Memory

Description

Display apparatus and method for optimizing image size {APPARATUS AND METHOD FOR OPTIMIZING THE IMAGE SIZE OF A DISPLAY DEVICE}

The present invention relates to an apparatus and a method for optimizing an image size of a display device, and more particularly, to an apparatus and a method for optimizing an image size of a display device using objective vision information of a user.

Recent mobile terminals provide various additional functions such as a camera, an MP3 player, an Internet function, and a short message transmission function in addition to a voice call function. In addition, the shape and user interface of the mobile terminal are also designed in consideration of many design elements.

For example, in the past, the menu of the mobile terminal was a text method, but recently, it is generally configured to provide an icon and a simple movement function so that it is not gorgeous but does not give a boring feeling like the text method. In addition, by allowing the background image to be output in the idle mode of the mobile terminal, a more colorful feeling can be provided.

However, the graphic interface as described above is intended to attract the user's attention by emphasizing the visual splendor, and practical technology is not considered for users with poor eyesight, such as the elderly or the disabled, but rather for users with low vision. It would be further desirable to include a technique that allows for varying the size of the text.

Therefore, although the conventional function has a function of allowing the user to directly set the font size by setting the menu, the font size that can be set is limited to a large or small font designated by default, so that the proper font size is determined according to the user's eyesight. This is difficult and cumbersome to adjust.

The present invention provides a display device for optimizing the size of an image by using an objective vision measurement method.

In addition, the present invention provides a display method for optimizing an image size using an objective vision measurement method.

The present invention provides a camera module for capturing eye changes of a user; An eyesight measurement module for measuring eyesight of the user by using an image provided by the camera module and an objective vision measurement method; And a control unit for adjusting the size of an image displayed on the display unit based on the vision measurement value provided from the vision measurement module.

In addition, the present invention comprises the step of executing the vision measurement application through the key input by the user; Selecting an objective vision measuring method from the user; Measuring eyesight by observing eye changes of the user according to the selected eyesight measuring method; And adjusting the size of the image displayed on the display unit by using the measured visual acuity value.

According to an exemplary embodiment of the present invention, display devices such as a mobile communication terminal, a portable terminal, and a navigation device may improve user convenience by providing a size of an image, a letter, or a number that is suitable for a user's eyesight on a screen.

Meanwhile, various other effects will be directly or implicitly disclosed in the detailed description according to the embodiment of the present invention to be described later.

1 is a view showing a device and a scene for performing the vision measurement using the trigger method of the objective vision measurement method;
2 is a view showing an apparatus and a scene for performing an eye measurement using the suppression method of the objective eye measurement method;
3 is a view showing the shape of the inhibitory stimulus in the objective vision measurement method using the inhibition method;
4 is an internal configuration diagram of a mobile communication terminal according to an embodiment of the present invention;
5 is a diagram illustrating a procedure for optimizing an image size of a display apparatus using a vision measuring method according to an exemplary embodiment of the present invention.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

In general, there are subjective and objective methods of visual acuity measurement, and most of the visual acuity methods currently used in clinical practice are subjective methods, which are well-coordinated normals because the test subject needs to read and express. This is possible for a range of subjects.

On the other hand, it is impossible to measure eyesight in such a subjective way for infants and children who do not cooperate well, for those who lie for their own benefit, and patients with mental illness. Therefore, an objective visual acuity measuring method is required for such subjects. In particular, the objective visual acuity measurement method has a provocation method and a suppression method, and these methods are measured by using eyeball stimulation (or rhythm) during the test.

An embodiment of the present invention provides an apparatus and method for optimizing an image size of a display apparatus using the objective vision measuring methods. For convenience of description, in the following embodiment, it is assumed that a mobile communication terminal as an example of the display device.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

FIG. 1 illustrates a mobile communication terminal for performing an eye test using an induction method among objective eye measurement methods. That is, FIG. 1A illustrates an image for visual acuity measurement using a triggering method, and FIG. 1B illustrates a visual acuity measurement scene using a triggering method.

Referring to FIG. 1, the mobile communication terminal 100 displays a display 110 for outputting an image for vision measurement, a camera module 120 for capturing an eyeball of a user, and a key for executing an application for vision measurement. The input unit 130 is included.

Through a simple operation of the key input unit 130, the user may execute an application for measuring eyesight stored in advance in the mobile communication terminal 100. Here, the visual acuity measurement application includes, but is not limited to, a visual acuity measurement program using a provocation method and a visual acuity measurement program using a suppression method.

In the vision measuring application, when a vision measuring method using the triggering method is selected by the user, the display 110 outputs an image for vision measurement using the triggering method. In this case, the display 110 outputs the images stored in advance in the vision measurement program by the triggering method.

In addition, when the vision measuring application is executed, the camera module 120 starts capturing an image in order to observe the eye change of the user.

The visual acuity measurement program using the provoking method finds the minimum stimulus that causes the user's trial while slowly changing the induced stimulus, and executes a procedure for measuring the visual acuity of the user.

For example, as shown in (a) of FIG. 1, the vision measuring program by the induction method outputs vertical stripes formed of black / white through the display unit 110, and the vertical stripes output on the screen are displayed. Moving from one direction to the other direction causes the user's trial during vibration. Subsequently, as shown in FIG. 1B, the camera module 120 may measure the visual acuity of the user by detecting the minimum induced stimulus that is reacted by the user.

In addition, the vision measurement program can freely adjust the moving direction, the moving speed and the size of the vertical stripes made of black / white. In this case, the stimulus time may be determined according to the width of the black vertical stripes and the white vertical stripes, and the visual acuity of the user may be measured by applying this stepwise with the change of the moving speed.

The vision measurement program may be stored in advance in a memory or the like, and the vision measurement program may be executed by a user's execution command. On the other hand, in the present embodiment, the induced stimulus for the objective vision measurement illustrates the vertical stripes of the black / white, but is not limited thereto.

2 illustrates a mobile communication terminal for performing an eye test using a suppression method among objective eye measurement methods. That is, FIG. 2A shows an image for visual inspection using the suppression method, and FIG. 2B shows a visual inspection scene using the suppression method.

Referring to FIG. 2, the mobile communication terminal 100 displays a display 110 for outputting an image for vision measurement, a camera module 120 for capturing an eyeball of a user, and a key for executing an application for vision measurement. The input unit 130 is included.

Through a simple operation of the key input unit 130, the user may execute an application for measuring eyesight stored in advance in the mobile communication terminal 100. Here, the application for visual acuity measurement includes, but is not limited to, a visual acuity measuring method using an induction method and a visual acuity measuring method using a suppression method.

In the visual acuity measuring application, when a visual acuity measuring method using the suppression method is selected by a user, the display 110 outputs an image for visual acuity measurement using the suppression method. In this case, the display 110 outputs the images stored in advance in the vision measurement program by the suppression method.

In addition, when the vision measuring application is executed, the camera module 120 starts capturing an image in order to observe the eye change of the user.

The visual acuity measurement program using the suppression method detects a time point in which eye movement stops by applying a stepwise suppression stimulus in a state where a constant induced stimulus is applied, and executes a method of measuring the visual acuity of the user.

For example, as shown in (a) of FIG. 2, the vision measuring program using the suppression method outputs stripes that cause a certain stimulus through the display 110. Then, the fixed stimulus (that is, the suppression stimulus 140) is applied to the center portion of the output screen, and then the size thereof is gradually changed.

Then, the user stops eye movement at the moment of seeing and recognizing the suppression stimulus 140. At this time, as shown in (b) of Figure 2, the camera module 120 is able to measure the visual acuity of the user by detecting the magnitude of the inhibitory stimulus responded by the user.

In addition, the vision measurement program is to be able to freely adjust the size of the suppression stimulus 140. For example, as shown in FIG. 3, the suppression stimulus 140 has a square-shaped pixel as a unit, and adds pixels one by one to each of the first stimulus 310, the second stimulus 320, and the third stimulus ( 330, and the stimuli 340a, 340b, and 340c above the fourth stimulus may have a square shape.

In addition, the vision measurement program may be stored in a memory (not shown) or the like, and the vision measurement program may be executed by a user's execution command. On the other hand, in the present embodiment, the inhibitory stimulus for the objective vision measurement illustrates a square arranged in a matrix form, but is not limited thereto.

4 is a diagram illustrating an internal configuration of a mobile communication terminal according to an embodiment of the present invention.

Referring to FIG. 4, the mobile communication terminal 400 includes an RF module 402, a baseband processor 404, a microprocessor unit 406, a codec 408, a microphone 410, and a speaker. 412, a camera module 414, a key input unit 416, a display unit 418, a vision measurement module 420, and a memory 422. Meanwhile, in the following description, parts not related to the contents of the present invention in the operation of the mobile communication terminal 400 will be omitted.

The controller 406 controls the overall operation of the mobile communication terminal 400. For example, the controller 406 performs voice call and data communication processing and control, and processes an operation for optimizing the size of an image using an objective vision measuring method according to an embodiment of the present invention in addition to a normal function. . In the following description, description of the operation of the conventional control unit 406 will be omitted.

The memory 422 stores a program for processing and control of the controller 406, various reference data, and temporary data generated during execution of various programs. In addition, the memory 422 may store an objective vision measurement program according to an embodiment of the present invention.

The key input unit 416 provides the control unit 406 with key input data corresponding to an input key pressed by the user. The key input unit 416 includes numeric keys 0 to 9, a menu, a confirmation, a text transmission, a call (TALK), a clear (CLR), an end (END), *, #, navigation keys and an emergency key. And a plurality of function keys. A user may execute an application for measuring eyesight in the mobile communication terminal 400 through a simple input of the key input unit 416.

The display unit 418 displays status information, a text message, a game, a video, a still image, and the like, which occur during the operation of the mobile communication terminal 400. In addition, the display unit 418 may adjust the size of an image, a letter or a number displayed on the screen according to the command of the controller 406.

The codec 408, the speaker 412 and the microphone 410 connected to the codec 408 are voice input / output blocks used for voice call and voice recording. The codec 408 converts PCM (Pulse Code Modulation) data provided from the controller 406 into an analog voice signal and transmits the same through the speaker 412. In addition, the codec 408 converts an analog voice signal received through the microphone 410 into PCM data and provides the control to the control unit 406.

The RF module 402 reduces the frequency of the RF signal received through the antenna and provides it to the baseband processor 404. In addition, the RF module 402 increases the frequency of the baseband signal input from the baseband processor 404 and transmits the frequency through the antenna.

The baseband processor 404 processes a baseband signal transmitted and received between the RF module 402 and the controller 406. For example, when transmitting a signal, the baseband processor 404 performs signal processing such as channel coding and modulation on the transmission signal generated by the controller 406. Meanwhile, when receiving a signal, the baseband processor 404 performs signal processing such as channel decoding and demodulation.

The camera module 414 takes a picture and a video and provides the captured image data to the controller 406 and the memory 422. In the present embodiment, when the vision measuring application is executed, the camera module 414 starts capturing an image to observe the eye change of the user. In this case, the camera module 414 may accurately photograph the eyeball of the user using a well-known shape recognition algorithm.

The visual acuity measuring module 420 executes a visual acuity measuring program stored in the memory 422 to measure an objective visual acuity of a user.

That is, when the user executes the vision measuring application through a simple operation of the key input unit 416, the vision measuring module 420 executes the vision measuring program stored in the memory 422.

Meanwhile, the vision measuring program is stored in the memory 422, but may be stored in the vision measuring module 420 instead of the memory 422. In addition, the vision measurement program includes, but is not limited to, a vision measurement program by an induction method and a vision measurement program by a suppression method.

When the vision measurement program is executed, the vision measurement module 420 provides a user with a selection window for selecting an objective vision measurement method through the controller 406 and the display 418. Then, the user can select any one of the method of measuring the vision by the method of induction or suppression through a simple operation of the key input unit 416.

The visual acuity measuring module 420 executes a visual acuity measuring program for performing a visual acuity measuring method selected by a user. For example, the vision measuring program by the triggering method may be executed by the method of FIG. 2 described above, and the vision measuring program by the suppression method may be executed by the method of FIG. 3 described above. In this way, the vision measuring module 420 may measure the user's vision by an objective method.

The vision measuring module 420 provides the measured vision information to the memory 422 and stores the measured vision information. In addition, the visual acuity measurement module 420 provides the measured visual acuity information to the controller 406.

The controller 406 may provide the user with vision information measured by the vision measuring module 420 through the display 418. In addition, the controller 405 may optimize the size of an image, a letter, or a number displayed on the screen of the display unit 418 based on the measured visual acuity information. In this case, the memory 422 may previously store an optimal image size according to the user's vision in the form of a lookup table.

Meanwhile, in the present embodiment, a method of changing the size of an image or a text after measuring a user's eyesight is described. However, when the user already knows his or her eyesight, a separate menu window for directly inputting the eyesight of the user may be further provided to automatically change the font size without separately measuring the eyesight.

5 is a flowchart illustrating a procedure for optimizing an image size of a display apparatus using a vision measuring method according to an exemplary embodiment of the present invention.

Referring to FIG. 5, in operation 510, a user executes an application for measuring eyesight through a key input unit of a display device. In this case, the display device provides a selection window for the user to select any one of the objective vision measurement method.

In operation 520, the user selects any one of a method of measuring visual acuity by an induction method and a method of measuring visual acuity by a suppression method. In operation 530, when the selection of the vision measuring method is completed, the display apparatus measures a user's vision by executing a program according to the selected measurement method.

For example, the vision measuring program by the triggering method may be executed by the method of FIG. 2 described above, and the vision measuring program by the suppression method may be executed by the method of FIG. 3 described above. In this way, the display device can measure the user's vision by an objective method.

In operation 540, the display apparatus determines an optimal image size according to the user's vision. The display device changes the size of an image, letter or number displayed on the screen based on the determined optimal image size.

As described above, the present invention can measure the user's vision by using an objective vision measurement method, and improve the convenience of the user by changing the size of the image, letters or numbers on the screen according to the user's vision. have.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

That is, the detailed description of the above-described invention shows an implementation example applied to a mobile communication terminal. However, the present invention can be applied to other devices including display devices such as navigation, e-books, portable terminals, etc. without departing from the scope of the present invention, and the technical field of the present invention. In the judgment of those skilled in the art will be possible.

400: mobile communication terminal 406: control unit
414: camera module 418: display unit
420: vision measurement module 422: memory

Claims (6)

A camera module for photographing eye changes of a user;
An eyesight measurement module for measuring eyesight of the user by using an image provided by the camera module and an objective vision measurement method; And
And a control unit for adjusting the size of an image displayed on the display unit based on the vision measurement value provided from the vision measurement module. The method of claim 1,
And a memory for storing a program for performing the objective measuring method. The method of claim 2,
The memory may be configured to store an optimal image size according to vision in the form of a lookup table. The method of claim 1,
The objective visual acuity measuring method includes a visual acuity measuring method using an induction method and a visual acuity measuring method using a suppression method. Executing a vision measuring application through a key input by a user;
Selecting an objective vision measuring method from the user;
Measuring eyesight by observing eye changes of the user according to the selected eyesight measuring method; And
And adjusting the size of the image displayed on the display unit by using the measured visual acuity value. The method of claim 5,
The objective measuring method includes a visual acuity measuring method using an induction method and a visual acuity measuring method using a suppression method.

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