JPH10268807A - Multi-resolution lcd panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate lowering in picture quality at the time of enlargement display of low resolution and intermediate resolution, to eliminate a controller for centering and enlargement display, and to decrease the number of components, by displaying images of different resolution all with the same screen size. SOLUTION: For display of low resolution, a select signal for the low resolution is inputted to an LCD panel with a resolution select signal 4 from a device main body to make the screen of a low-resolution panel 1 effective and the display is made with the same screen size with a high-resolution panel 3. In this state, when the display is switched to intermediate-resolution display, a select signal for intermediate resolution signal is inputted to the LCD panel with the resolution select signal 4 to make the screen of an intermediate- resolution panel 2 effective and the display is made with the same screen size with the high-resolution panel 3. Similarly, when the display is switched to high-resolution display, a select signal for high resolution is inputted to the LCD panel with the resolution select signal 4 to make the screen of the high- resolution panel 3 effective.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an apparatus having an LCD panel, and more particularly to an LCD panel of an information processing apparatus such as a word processor and a computer.

[0002]

2. Description of the Related Art Conventionally, in an apparatus having an LCD panel capable of high resolution display, when an attempt is made to display a low resolution, the display is centered and displayed on the LCD panel or enlarged to a size equivalent to the high resolution. Is displayed.

Also, centering and enlarging display require editing low-resolution data with respect to a high-resolution synchronizing signal.
M or the like is required.

FIG. 2 shows an example of a conventional LCD panel. FIG. 2A is a diagram showing centering, and a screen size 12 at low resolution and a screen size 13 at medium resolution.
Is displayed on the screen of screen size 11 at the time of high resolution. FIG. 2B is a diagram showing an enlarged display. When the screen size 12 at the time of low resolution and the screen size 13 at the time of medium resolution are displayed, the enlargement direction of the enlarged display (at the time of low resolution) 14, the enlargement As shown in a display extension direction (medium resolution) 15, the image is enlarged and displayed on a screen of the screen size at the time of high resolution.

A known example of a conventional enlarged display of an LCD panel is disclosed in Japanese Patent Application Laid-Open No. Hei 7-281637.

An enlarged display of the conventional LCD panel will be described with reference to the drawings.

FIG. 3 is a block diagram of a conventional system showing an enlarged display of an LCD panel.

In the conventional enlarged display of an LCD panel, display data read from a video RAM 21 is stored in a buffer 24, converted by a pixel pattern conversion circuit 22 according to a pixel pattern conversion method, and then converted to R as display data.
By reading from the OM 25, an enlarged display is performed on the LCD panel 23. However, the circuit for enlargement editing shown in FIG. 3 is required, and the circuit configuration is complicated.

[0009]

The first problem is that, when a low-resolution display is performed, a small screen is displayed due to centering, and the image quality deteriorates when the display is enlarged to a size equivalent to a high resolution. That's what it means.

The reason is that an LCD capable of high-resolution display is used.
This is because outputting a low-resolution display on a panel reduces the number of physical display dots.

The reason why the image quality deteriorates when the image is enlarged and displayed is that the enlargement ratio of the low resolution is not a positive multiple of the high resolution in most cases, so that uniform enlargement cannot be performed.

The second problem is that problems such as an increase in the number of components and mounting area and an increase in cost occur.

The reason is that a special controller for density conversion and centering, a video RAM, and the like are required.

[0014]

SUMMARY OF THE INVENTION A first object of the present invention is to provide:
When displaying a plurality of different resolutions on the LCD, the display is to be performed at the same screen size at all resolutions.

A second object of the present invention is to eliminate the deterioration of the image quality due to the enlarged display of the low resolution display.

A third object of the present invention is to eliminate a special controller necessary for performing centering and enlarged display, and to reduce the number of parts and the area of parts.

For this reason, 1. The multi-resolution LCD panel of the present invention is a plurality of LCDs having the same screen size with different resolutions and transparency.
It is characterized in that panels are attached.

2. A multi-resolution LCD panel according to the present invention is characterized in that LCD panel surfaces having different display resolutions are switched by a resolution select signal for switching between panel surfaces having different resolutions.

3. The multi-resolution LCD panel according to the present invention has a low-resolution panel, a medium-resolution panel, and a high-resolution panel, each of which is transparent.
A low-resolution panel, a medium-resolution panel, and a high-resolution panel are switched by a resolution select signal for switching panel surfaces having different resolutions.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A resolution select signal output from the apparatus main body selects which resolution of the LCD panel surface is effective.

A synchronizing signal output from the apparatus main body,
As for the display data, an optimal signal is output to the LCD panel surface of the selected resolution. Therefore, at the time of low-resolution and medium-resolution display, a special controller and a video RAM are not used, and a high-resolution image is displayed without deterioration. It is possible to display at the same size as the resolution.

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a view showing an embodiment of an LCD panel according to the present invention, FIG. 1 (a) is a side view thereof, and FIG. 1 (b) is a front view thereof.

The LCD panel of the present embodiment is shown in FIG.
As shown in (a), the translucent low-resolution panel 1, medium-resolution panel 2, and high-resolution panel 3 are bonded to each other. Then, as shown in FIG. 1B, the screen sizes of the low resolution panel 1, the middle resolution panel 2, and the high resolution panel 3 are the same.

As for the panel surface of each resolution, a valid panel surface is selected by the resolution select signal 4 for switching the panel surface of different resolution. Next, the operation will be described.

When an attempt is made to display a low resolution, a low resolution select signal is input to the LCD panel in accordance with the resolution select signal 4 from the apparatus main body. As a result, the screen of the low resolution panel 1 becomes effective for display, and is displayed in the same screen size as the high resolution panel 3.

In this state, when an attempt is made to switch to the medium resolution display, a medium resolution select signal is input to the LCD panel by the resolution select signal 4 from the apparatus body. As a result, the display of the screen of the middle resolution panel 2 is enabled, and the screen is displayed in the same screen size as the high resolution panel 3.

Similarly, when an attempt is made to switch to the high-resolution display, a high-resolution select signal is input to the LCD panel by the resolution select signal 4 from the main body of the apparatus.
As a result, the display of the screen of the high resolution panel 3 becomes effective.

[0029]

The first effect is that screens of different resolutions can be displayed in the same screen size.

The reason is that the LCD panels have the same size and have the most suitable pixels for each resolution.

The second effect is that a special control device for performing centering or enlarging display for low-resolution display is not required.

The reason is that by selecting a valid panel surface with a resolution select signal, a low-resolution synchronization signal and display data output from the apparatus main body can be directly input to the LCD panel without editing.

The third effect is that the number of parts of the device can be reduced, the mounting area can be reduced, and the cost can be reduced.

The reason is that the special control device shown in the second effect is not required.

The fourth effect is that there is no deterioration in image quality in enlarged display.

The reason for this is that, as shown in the reason for the first effect, since the panel surfaces of the respective resolutions have the same size, there is no need to enlarge them.

[Brief description of the drawings]

FIG. 1 is a diagram showing one embodiment of an LCD panel of the present invention.

FIG. 2 is a diagram showing an example of a conventional LCD panel.

FIG. 3 is a configuration diagram of a system using a conventional LCD panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Low-resolution panel 2 Medium-resolution panel 3 High-resolution panel 4 Resolution select signal 11 Screen size at the time of high resolution 12 Screen size at the time of low resolution 13 Screen size at the time of medium resolution 14 Direction of enlargement display (at the time of low resolution) 15 Enlargement Display enlargement direction (at medium resolution) 21 Video RAM 22 Pixel pattern conversion circuit 23 LCD panel 24 Buffer 25 ROM

Claims (3)

[Claims] 1. A multi-resolution LCD panel comprising a plurality of translucent LCD panels having the same screen size and different resolutions. 2. LCs having different display resolutions according to a resolution select signal for switching panel surfaces having different resolutions.
A multi-resolution LCD panel characterized by switching a D panel surface. 3. A low-resolution panel, a medium-resolution panel, and a high-resolution panel, which are respectively transparent, are bonded to each other, and the low-resolution panel, the medium-resolution panel, A multi-resolution LCD panel characterized by switching between panel surfaces of a panel and a high-resolution panel.