JPH07181939A - Display device - Google Patents

Abstract

PURPOSE:To improve the efficiency of drawing and document preparation by detecting human operation, and automatically enlarging part of a display screen or displaying the whole image. CONSTITUTION:The display device is equipped with a display panel 1, a memory 4 which stores an image display signal displayed on the display panel 1, a sensor 2 which measures the distance between a user and the display panel 1, and a microcomputer 5 which displays image data stored in the memory 4 on the display panel 1 as an enlarged image or as a reduced image on the basis of the signal from the sensor 2. The sensor 2 measures the distance between the user and display panel 1, and on the basis of this measured value, the image data stored in the memory 4 are displayed on the display panel 1 as the reduced image when the distance between the user and display panel 1 is long or as the enlarged image when the distance is short.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device such as a personal computer or an operation panel.

[0002]

2. Description of the Related Art Conventionally, in order to confirm a partial enlargement of the display screen or the entire image, a command for enlarging or reducing the icon on the screen is applied to the desired image by a mouse operation whenever necessary. Had to occur.

For example, when drawing a drawing by CAD, when a fine portion or a dimension line or R is inserted, the portion of the drawing to be enlarged is designated by an icon on the screen by operating the mouse, and the portion is enlarged, and necessary. After drawing a line, R, etc., it was necessary to reduce the size again and display the entire drawing for confirmation.

[0004]

As described above, when partially enlarging the display screen or checking the whole image, mechanical operation such as a mouse is required, and the operation is troublesome, and the man-machine interface is not available. There were problems such as delays and lack of consideration for people with disabilities.

In view of the above points, the present invention does not require a mechanical operation such as a mouse to detect a partially enlarged display screen or an entire image, and detects a motion casually performed by a human being. , A part of the display screen is automatically enlarged,
Another object is to provide a display device that displays the entire image and improves the efficiency of drawing and writing.

[0006]

In order to achieve the above object, in the present invention, a display panel, a memory for storing an image signal displayed on the display panel,
A sensor for measuring the distance between the user and the display panel, and a control for displaying the image data stored in the memory on the display panel as an enlarged image or a reduced image based on a signal from the sensor. And means.

[0007]

According to the above configuration, the sensor measures the distance between the user and the display panel, and based on the measured value, if the distance between the user and the display panel is long,
The image data stored in the memory is displayed as a reduced image on the display panel, and if the distance between the user and the display panel is short, the image data stored in the memory is displayed as an enlarged image on the display panel.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the drawings.
FIG. 1 is a block circuit diagram showing the configuration of the display device according to the present embodiment. Reference numeral 1 is a liquid crystal display for displaying display contents, and 2 is a sensor (for example, CCD, PSD, ultrasonic sensor, etc.) for measuring the distance between the user and the liquid crystal display 1.

Reference numeral 3 designates the signal of the sensor 2 at H level and L level.
Reference numeral 4 is a comparator for converting into a level signal, and 4 is a memory for storing the image signal of the display screen as data (for example, FR
AM, FLASH, EEPROM, etc.) 5 is a system control microcomputer for controlling the entire system.

Reference numeral 6 denotes a driver circuit for outputting signals to an X driver 7 for outputting a horizontal signal and a Y driver 8 for outputting a vertical signal in order to drive the liquid crystal display 1. Reference numeral 9 is an image input device such as a keyboard and a mouse.

Next, the operation will be described. First, the image input device 9 causes the memory 4 to store image data as needed. Memory 4 is FRAM, FLASH, EEPROM
It is possible to write at any time, and this image data is held for a long time without any backup power supply. That is, in the case of work such as drawing drawing, which is performed over many days, the power is turned on and off many times, so it is very convenient if the memory 4 retains the data even when the power is turned off. is there.

The image data stored in the memory 4 is read out by the microcomputer 5 as needed and output to the driver circuit 6. The image data input to the driver circuit 6 is displayed on the liquid crystal display 1 via the X driver 7 and the Y driver 8.

On the other hand, the sensor 2 measures the distance between the user and the liquid crystal display 1. The sensor 2 is a CCD,
A distance sensor such as a PSD or an ultrasonic sensor outputs a signal corresponding to the distance between the user and the liquid crystal display 1 as an analog voltage. That is, when the distance between the user and the liquid crystal display 1 is long, the output voltage of the sensor 2 is at a low level, and the output voltage of the sensor 2 increases as the user approaches the liquid crystal display 1. An analog voltage signal corresponding to the distance between the user and the liquid crystal display 1 is input to the comparator 3.

In the comparator 3, the output voltage of the sensor 2 is compared with a certain set threshold voltage, and the sensor 2
If the output voltage of 1 has not reached the threshold voltage, the L level voltage is output, and if the output voltage of the sensor 2 reaches the threshold voltage, the H level voltage is output.

The microcomputer 5 switches the display image of the liquid crystal display 1 from the reduced image to the enlarged image based on the output voltage of the comparator 3. That is, when the output voltage of the comparator 3 is L level, the reduced image is displayed on the liquid crystal display 1, and when the output voltage of the comparator 3 is H level, the enlarged image is displayed on the liquid crystal display 1. Therefore, if the distance between the user and the liquid crystal display 1 is long, a reduced image is displayed on the liquid crystal display 1, and if the distance between the user and the liquid crystal display 1 is short,
An enlarged image is displayed on the liquid crystal display 1.

The manner in which the images are switched is shown in FIGS. FIG. 2 shows how a reduced image is displayed on the liquid crystal display 1 when the distance between the user and the liquid crystal display 1 is long. In FIG. 2, a is a user who is looking at the screen of the liquid crystal display 1, and b is a reduced image displayed on the liquid crystal display 1 when the distance between the user a and the liquid crystal display 1 is long.

FIG. 3 shows the user and the liquid crystal display 1.
When the distance between and is short, the enlarged image is displayed on the liquid crystal display 1. In FIG. 3, a is a user who is looking at the screen of the liquid crystal display 1, and c is an enlarged image displayed on the liquid crystal display 1 when the distance between the user a and the liquid crystal display 1 is short. In this way, in this embodiment, the display image is enlarged or reduced in real time according to the need of the user.

[0018]

As described above, according to the present invention, a display panel, a memory for storing an image signal displayed on the display panel, a sensor for measuring a distance between a user and the display panel, Since the image data stored in the memory based on the signal from the sensor is displayed on the display panel as an enlarged image or a reduced image, a mechanical operation such as a mouse is performed. This is convenient because the display screen is partially enlarged or the entire image is automatically displayed according to the operation casually performed by humans without requiring.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a configuration of the present invention.

FIG. 2 is a diagram showing how a reduced image is displayed on the liquid crystal display when the distance between the user and the liquid crystal display is long.

FIG. 3 is a diagram showing a state in which a magnified image is displayed on the liquid crystal display when the distance between the user and the liquid crystal display is short.

[Explanation of symbols]

 1 liquid crystal display 2 sensor 3 comparator 4 memory 5 system control micro computer 6 driver circuit 7 X driver 8 Y driver 9 image input device i user b reduced image ha enlarged image

Claims (1)

[Claims] 1. A display panel, a memory for storing an image signal displayed on the display panel, a sensor for measuring a distance between a user and the display panel, and a memory for storing the memory based on a signal from the sensor. A display device comprising: control means for displaying the stored image data on the display panel as an enlarged image or a reduced image.