JPH01169622A - Display device - Google Patents

Abstract

PURPOSE:To make a mouse cursor visible even when a display device slow in reaction is used and to improve the method to use by providing means to plural hourly different pieces of coordinate information outputted by the same coordinate input device, and constituting the mouse cursor to be moved at high speed in an arbitrary direction. CONSTITUTION:Means 12 and 13 to store plural hourly different pieces of coordinate information outputted by the same coordinate input device are provided, a cursor font 11 is written to a certain coordinate position of a displaying memory 7, the mouse cursor is actually moved, then, the mouse is not erased until at least LCD (liquid crystal display device) is reacted, and plural cursors on the moving locus are written into a displaying memory 7. Thus, by writing the cursor font 11 to the same position of the displaying memory 7 for a constant time, the displaying signal is given to a display device 8 due to an LCD for several periods of reading, namely, the voltage is continued to be impressed and the cursor is displayed to the LCD. Thus, the displaying can be executed so that the mouse cursor can be watched to the display device with a late reaction like the LCD.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device for an information processing device such as a personal computer, and particularly to a display device using a liquid crystal display element suitable for a portable information processing device.

[Conventional technology]

Along with the demand for downsizing of information processing devices such as personal computers, portable machines using liquid crystal display devices (hereinafter referred to as LCDs) have been announced.

On the software side, on the other hand, inputting commands from a keyboard is difficult, so there is an increasing number of application software that uses a coordinate input device called a mouse to move the mouse cursor and select from a menu to proceed with the task.

An information processing machine that can use such a mouse is a personal computer B16E manufactured by Hitachi, Ltd., although the display device is a conventional CRT.
X I[, and the application software is B manufactured by the same company.
-There is DRAW.

The mouse cursor described above has the conditions that it can move at a faster speed and in any direction than a normal (keyboard input) cursor. When trying to use it, the LCD has a slow response time, so the mouse cursor is not displayed while it is being moved, making it difficult to see where it has been moved. Hereinafter, the drawbacks of the conventional example will be explained using figures.

FIG. 4 is a schematic block diagram showing an example of the configuration of a part related to mouse cursor display of a personal computer, in which 1 is a microprocessor (hereinafter referred to as CPU);
2 is the system bus, 3 is the mouse, 4 is the coordinate counter,
Movement information 9 indicating the amount of movement of the mouse 3 outputted from the mouse 3 is input, and relative coordinates are shown. 5 is a cursor font memory that stores the pattern of the mouse cursor (usually an "arrow"), 6 is a register that stores the coordinates of the mouse cursor, 7 is a display memory that stores display data, and 8 is a memory for LCD, etc. display device, l.

is coordinate information, specifically indicating relative coordinate values.

Note that 11 is a cursor font.

Further, FIG. 5 is a flowchart showing an example of processing when using the configuration shown in FIG. 4.

4 and 5, first, the CPUI periodically reads the coordinate information 10 from the coordinate counter 4 and writes it into the coordinate storage register 6 via the system bus 2. When the mouse 3 moves, the movement information 9 immediately updates the coordinate counter, but this operation is performed independently of the operation of the CPU 1 described above.

Thereafter, the CPUI reads the cursor font 11 from the cursor font memory 5 and writes it into the display memory 7 according to this coordinate information 1o.

In this way, the mouse cursor written to the display memory 7 is displayed.If we consider this in terms of moving the mouse cursor, first, as shown in FIG. Erase the cursor at the position. Next, the new coordinate information 1o is read in the sequence described above, and the cursor font is written at the new coordinates in the display memory 7.

The cursor font 11 written in the display memory 7 is periodically read out and displayed on the display device 8. Since this display operation is well known, details will be omitted.

[Problems that the invention attempts to solve]

In the above-mentioned conventional technology, no consideration was given to displaying a mouse cursor that moves quickly and in any direction on a slow-response display device such as an LCD, resulting in the problem that the mouse cursor becomes invisible. there were.

The present invention relates to a display device that visibly displays a mouse cursor on a slow-response display device such as an LCD.

[Means for solving problems]

The above object is to provide means for storing a plurality of different coordinate information at the same time output by the same coordinate input device, and when a cursor font is written to the coordinate position of the display memory, even if the mouse cursor actually moves, at least the LCD This is achieved by writing a plurality of cursors on the movement trajectory into the display memory without erasing them until the cursor reacts.

[Effect]

By leaving the cursor font written to the same location in display memory for a certain period of time,
A display signal is applied to the LCD display device, that is, a voltage continues to be applied. As a result, a cursor is displayed on the LCD.

4. [Example] An example of the present invention will be described below with reference to the drawings. still,
To simplify the explanation, it is assumed that two cursors on the movement locus are written in the display memory and displayed.

FIG. 1 is a block diagram of an embodiment of the present invention.
5, 7 to 9, and 11 are the same as those shown with the same reference numerals in FIG. 12 is a storage register for the previous mouse cursor coordinate position (hereinafter referred to as coordinate 1), 14 is the coordinate l information, and 13 is the latest mouse cursor coordinate position (hereinafter referred to as coordinate 1).
(referred to as coordinate 2), and 15 is the coordinate 2 information.

FIG. 2 shows an example of a processing flow when the configuration shown in FIG. 1 is used. Since the basic operation shown in FIG. 1 is the same as that of the conventional example (FIG. 4), it will be explained using FIG. 4 as well.

First, the CPU erases the cursor of the coordinate 1 information 14 in the coordinate 1 storage register 12. Next, coordinate 2 storage register 1
Read the coordinate 2 information 15 of 3, and read the new coordinate 1 information 14
is written in the coordinate 1 storage register 12, and the mouse cursor is displayed at that position in the same manner as in the conventional example. After that, the coordinate 2 information 15 is read from the coordinate counter 4, and written to the coordinate 2 storage register as in the conventional example, and the coordinate 2 information 15 is
A cursor is also displayed at the position of the information 15, as in the conventional example.

FIG. 3 shows the above-mentioned operation using a cursor displayed on the display device 8. FIG. 3(a) shows the coordinates 1. A state in which two cursors at coordinate 2 are displayed is shown. Fifth
In Figure (b), the cursor at coordinate 1 is deleted and the value at coordinate 2 is moved to coordinate 1. In Figure 5 (c), the new coordinates are coordinates 2 information 1
5 from the coordinate counter 4 and display the cursor at the position of coordinate 2.

As can be seen from the above description, the cursor at coordinate 1 in FIG. 5(c) is displayed for twice as long as in the conventional example. As a result, reading for display on the display device 8 also
For example, what could previously only be done in one cycle can now be read out in several cycles.

That is, by applying voltage to the LCD of the display device 8 for a long time, this cursor becomes visible.

When an LCD is used as the display device 8 (!), this cursor font 11 is given in the form of voltage changes applied to each pixel of the LCD.

If the moving speed of the cursor is slow, the cursor font 11 written in the display memory 7 does not change its position during many cycles of reading and displaying, and voltage continues to be applied to the same coordinate position on the LCD. However, if the movement is fast, the voltage may be applied to the LCD for only one cycle at the given coordinates. At this time, since the LCD has a slow response, conventionally the cursor would move without reaching the lighting state, resulting in the cursor becoming invisible.

In the above description, for example, if the cursor position does not change, the operation of erasing the cursor, writing, and writing again from above is repeated. However, since the response of the LCD is slow, the operation of erasing and writing does not cause flickering, and the operation of overwriting from above only writes the same data at the same coordinates in the display memory 7, and has no effect.

7. Also, in the explanation of this embodiment, only the cursor display was considered, but in reality, in order to display the cursor on graphic data, the original graphic must be restored when the cursor is erased.

This can be solved by providing a separate save area for graphic information and saving and restoring the graphic information when displaying and erasing the cursor.

Furthermore, in the above explanation, two cursors are displayed simultaneously on the trajectory, but three or more coordinate memory registers are provided,
Three or more cursors may be displayed at the same time.

〔Effect of the invention〕

As explained above, according to the present invention, a plurality of cursors are displayed along the trajectory of the mouse cursor, that is, each cursor is displayed for a long period of time, so the voltage application to the LCD is also delayed for a long period of time, which slows down the reaction. The mouse cursor becomes visible even when using a slow display device, the usability is improved, and it is possible to provide a display device with excellent functions by eliminating the drawbacks of the prior art described above.

[Brief explanation of the drawing]

・ 8 ・ FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a flowchart showing the flow of processing in the configuration of FIG. 1, and FIG. FIG. 4 is a block diagram showing an example of a conventional display device, and FIG. 5 is a flowchart showing the process flow of the conventional display device. 1...CPU 3...Mouse 4...
Coordinate counter 7...Display memory 8...Display device 12...Coordinate storage register 13...
Coordinate 2 storage register 14...Coordinate 1 information 15...Coordinate 2 information agent Patent attorney Masaru Ogawa Male abuse 2 Figure (α) The power of Shikatan 1 - So: Shikou Gokamo 2's planting l ゛Kinte, 1 hissura (e-) The power of Tsume Haku 1 - So 1 and the way of wearing it is the power of Kamoto vote 99 Hj Beki ne ne 7ki Amen, Jissistahesu Y A Futo 2 -Nlshi Yuko,

Claims (1)

[Claims] 1. A display device comprising a microprocessor, a coordinate input device, and a display means is provided with means for storing a plurality of temporally different coordinate information output from the same coordinate input device,
A display device characterized in that a mouse cursor can be moved at high speed in any direction.