JP2004191642A - Image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display device for enhancing operability in the case of performing scroll, magnification/reduction of a display picture. <P>SOLUTION: An acceleration sensor 25 detects moving direction and moving quantity of a cellular phone 2. When the cellular phone 2 is moved in the up, down, left, right and oblique directions, a CPU 20 performs control so as to scroll the display picture of an LCD (liquid crystal display) 15 in up, down, left, right and oblique directions according to the moving quantity, when the cellular phone 2 is moved to the front, to magnify the display picture and when the cellular phone 2 is moved to the rear, to reduce the display screen. When the cellular phone 2 stands still, the acceleration sensor 25 sets a stationary position as a reference point for detecting the moving direction and the moving quantity. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image display device mounted on a mobile phone or a portable information terminal.
[0002]
[Prior art]
In recent years, cellular phones with an Internet connection function, a GPS (Global Positioning System) function capable of confirming the current position, a camera function, and the like are rapidly spreading. Along with this, the performance of the liquid crystal display device mounted on the mobile phone is improved, and a clearer image can be displayed.
[0003]
A mobile phone with a GPS or Internet connection function can use a map information service that downloads map information around the current position from an Internet server and displays the downloaded map on a liquid crystal display device. A portable information terminal having a GPS function has been proposed in which an image captured by an attached camera is combined with an image stored in advance based on GPS position data and terminal body direction data. (See Patent Document 1).
[0004]
[Patent Document 1]
Japanese translation of PCT publication No. 2001-503134
[Problems to be solved by the invention]
In conventional mobile phones, when using the map information service, the display screen of the liquid crystal display device is scrolled and enlarged / reduced by operating the cursor keys and trackballs provided on the mobile phone body. There are problems in operability, such as different operation methods depending on the type of mobile phone. Further, since only a part of the image is displayed on the liquid crystal display device, it is difficult to grasp the whole image sensuously and the user feels inconvenient.
[0006]
An object of the present invention is to provide an image display apparatus that improves operability when scrolling, enlarging, or reducing a display screen, and displays an image as if the user were looking at the real object.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, an image display device of the present invention includes a display device main body for displaying an image, a detection means for detecting a movement direction and a movement amount based on an image display surface of the display device main body, and a detection And a control means for scrolling or enlarging / reducing the display image of the display device body in accordance with a detection signal of the means.
[0008]
The display device main body is configured to be portable, and the display image is scrolled or enlarged / reduced by a movement operation of the display device main body by a holder.
[0009]
The detection means senses the movement of the display device main body in a direction substantially parallel to the image display surface, detects the movement direction and the movement amount, and the control means responds to a detection signal of the detection means. Scroll the display screen. Alternatively, the detection means senses the movement of the display device main body in a direction substantially orthogonal to the image display surface, detects the movement direction and the movement amount, and the control means detects the detection signal of the detection means. The display screen is enlarged or reduced accordingly.
[0010]
The detection means includes an acceleration sensor, and when the display device main body is stationary, the acceleration sensor sets the stationary position as a reference point for detecting the movement direction and the movement amount.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
In FIG. 1, the mobile phone 2 has a configuration in which an upper body 10 and a lower body 11 are rotatably engaged via a hinge portion 12. An antenna 13 is housed on the back surface of the upper body 10, and a reception speaker 14 and a liquid crystal display (LCD) 15 are provided on the front surface. The lower body 11 is provided with an operation unit 19 including a transmission microphone 16, a selection key 17 (portion surrounded by a one-dot chain line) and a dial key 18 (portion surrounded by a two-dot chain line).
[0012]
The hinge portion 12 is provided with a click mechanism (not shown) so that the upper body 10 and the lower body 11 are locked at a predetermined angle shown in the figure when the mobile phone 2 is used. When the mobile phone 2 is not used, the upper body 10 and the lower body 11 are folded and carried.
[0013]
The receiving speaker 14 outputs the voice or ringing melody of the communication partner. The transmission microphone 16 collects the voice of the speaker. The selection key 17 is operated when selecting / setting various setting menus such as registration of telephone numbers and mail addresses, and when using an Internet connection service or mail service. The dial key 18 is operated when inputting a telephone number or mail text.
[0014]
The antenna 13 is pulled out from the upper body 10 when using a call, mail, or the Internet, receives a radio signal from another mobile phone or an Internet server, and sends a radio signal transmitted from the mobile phone 2 to the outside. Send. As shown in FIG. 2, the radio signal transmitted / received by the antenna 13 is transmitted to the CPU 20 or the outside via the communication I / F 21.
[0015]
The CPU 20 comprehensively controls the operation of each unit of the mobile phone 2. The CPU 20 performs various signal processing on the radio wave signal transmitted via the communication I / F 21 and outputs the signal to the reception speaker 13 or the LCD 15 as sound or an image, and from the sound signal from the transmission microphone 16 or the operation unit 19. An input communication request signal or the like is converted into a radio wave signal and transmitted to the outside via the communication I / F 21 and the antenna 13.
[0016]
On the LCD 15, a menu screen including various setting menus, a telephone number or mail address of the called party, an image downloaded from an Internet server, and the like are displayed via the LCD driver 22.
[0017]
The position detection unit 23 detects the position of the mobile phone 2 using GPS using radio waves from an artificial satellite. The detection result by the position detection unit 23 is transmitted to the CPU 20.
The cellular phone 2 may use a map information service for downloading map information around the current position from the Internet server and displaying the downloaded map 30 (see FIG. 4) on the LCD 15 using the GPS and the Internet connection function. it can. The map information downloaded from the Internet server, the telephone number, the mail address, and various setting information input from the operation unit 19 are stored in the memory 24.
[0018]
The acceleration sensor 25 detects the moving direction and moving amount of the mobile phone 2. A detection result by the acceleration sensor 25 is transmitted to the CPU 20. The CPU 20 scrolls and enlarges / reduces the display screen of the LCD 15 via the LCD driver 22 according to the detection result. That is, when the mobile phone 2 is moved diagonally up, down, left, and right, the display screen of the LCD 15 is scrolled up, down, left, and right according to the amount of movement, and when moved forward, the display screen is enlarged, and when moved backward, it is reduced. To control.
[0019]
The acceleration sensor 25 sets the stationary position as a reference point for detecting the moving direction and the moving amount when the mobile phone 2 is stationary. Thereby, the display screen is scrolled and enlarged / reduced according to the moving direction and moving amount of the mobile phone 2. As the acceleration sensor 25, for example, a three-axis acceleration sensor manufactured by Crossbow Technology is used.
[0020]
Next, a processing procedure when the map information service is used with the mobile phone 2 will be described with reference to the flowchart of FIG. 3 and FIG. First, after the current position of the mobile phone 2 is detected by the position detection unit 23, the operation unit 19 is operated to access the Internet server, and map information around the current position is downloaded from the Internet server to the memory 24.
[0021]
The downloaded map information is read from the memory 24 to the CPU 20, subjected to image processing by the CPU 20, and then displayed on the LCD 15 via the LCD driver 22. Then, the stationary position of the mobile phone 2 is set as the reference point of the acceleration sensor 25.
[0022]
In order to obtain necessary information, the user moves the mobile phone 2 vertically, horizontally, diagonally and in the depth direction. The acceleration sensor 25 detects the moving direction and moving amount of the mobile phone 2. The CPU 20 scrolls and enlarges / reduces the display screen of the LCD 15 according to the detection result of the acceleration sensor 25. When a detection error occurs in the acceleration sensor 25 or when the mobile phone 2 is stopped, the position is set as a reference point again. When the use of the map information service is terminated, the operation unit 19 is operated to disconnect from the Internet server.
[0023]
With the configuration as described above, as shown virtually in FIG. 4, the user simply moves the mobile phone 2 and scrolls and enlarges the display screen as if there is actually a map. -Reduction can be performed. Even if the display screen is a small LCD, it is possible to easily handle a large-sized image.
[0024]
In the above embodiment, the display screen is enlarged when the mobile phone 2 is moved to the front, and the display screen is reduced when the mobile phone 2 is moved to the back. However, the display screen is reduced when the mobile phone 2 is moved to the front and enlarged when the display is moved to the back. You may do it. Similarly, the operation direction of the mobile phone 2 and the scroll of the display screen may be reversed, and the correspondence between the operation direction and the scrolling / enlarging / reducing can be selected according to the user's preference. Good.
[0025]
In the above embodiment, the map information service is given as an example. However, when browsing photos and text information, or when downloading and browsing an omnidirectional image introducing a store such as a boutique or restaurant from an Internet server, The present invention may be applied. Further, the present invention is not limited to the mobile phone according to the above-described embodiment, and can be applied to an image display device mounted on another portable information terminal.
[0026]
【The invention's effect】
As described above, according to the image display device of the present invention, the display device main body for displaying an image, the detection means for detecting the movement direction and the movement amount with reference to the image display surface of the display device main body, and the detection means Control means for scrolling or enlarging / reducing the display image of the display device according to the detection signal of the display device, which eliminates the need for operations using cursor keys, etc. Can do. As a result, the operability is improved, and an image can be displayed as if the user is looking at the real object.
[0027]
In addition, the acceleration sensor sets the stationary position as a reference point for detecting the moving direction and moving amount when the main body of the device is stationary, so that the display screen can be scrolled and enlarged / reduced according to the moving direction and moving amount. It can be carried out.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a mobile phone embodying the present invention.
FIG. 2 is a block diagram showing an electrical configuration of the mobile phone.
FIG. 3 is a flowchart showing a processing procedure when a map information service is used on a mobile phone.
FIG. 4 is a diagram showing a state in which a map is displayed on the LCD.
[Explanation of symbols]
2 Mobile phone 13 Antenna 15 Liquid crystal display (LCD)
19 Operation unit 20 CPU
21 Communication I / F
22 LCD driver 23 Position detector 24 Memory 25 Acceleration sensor 30 Map

Claims (5)

A display device main body for displaying an image, and a detecting means for detecting a movement direction and a movement amount based on an image display surface of the display device main body,
An image display device comprising: control means for scrolling or enlarging / reducing a display image of the display device body in accordance with a detection signal of the detection means. The image display device according to claim 1, wherein the display device body is configured to be portable, and the display image is scrolled or enlarged / reduced by a movement operation of the display device body by a holder. The detection means senses the movement of the display device main body in a direction substantially parallel to the image display surface, detects the movement direction and the movement amount,
The image display apparatus according to claim 1, wherein the control unit scrolls a display screen according to a detection signal of the detection unit. The detection means senses the movement of the display device body in a direction substantially orthogonal to the image display surface, detects the movement direction and the movement amount,
The image display apparatus according to claim 1, wherein the control unit enlarges or reduces a display screen in accordance with a detection signal of the detection unit. The detection unit includes an acceleration sensor, and the acceleration sensor sets a stationary position as a reference point for detecting the movement direction and the movement amount when the display device main body is stationary. 4. The image display device according to any one of 4.

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