JPH021014A - Portable computer - Google Patents

Abstract

PURPOSE:To arbitrarily select devices different in display condition to display data by arbitrarily displaying data on plural display devices based on data in respective data storage devices for display. CONSTITUTION:Each of display devices 10, 11, and 12 includes a display device (a), a picture controller (b), and a display data storage device (c). Display device control means 13, 14, and 15 are control means for devices 10, 11, and 12 respectively. A picture control means 16 selects means 13, 14, and 15 in accordance with a picture output request 17 and outputs data to devices 10, 11, and 12. An address rewriting means 22 is called and operated by a device change request 21 or at the time of starting an application program to rewrite the address of the means 16. A device discriminating means 20 checks setting of the requested display device. A device determining means 19 determines a device based on the means 20 and an address converting means 18 rewrites the address of the means 16 in accordance with the means 19.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a portable computer that can be equipped with two or more types of display devices.

[Prior Art] Conventionally, in this type of portable computer, one display data storage device is shared by a plurality of display devices, and by providing a delay circuit, the same data can be stored in each display device. was displayed.

[Problems to be Solved by the Invention] In conventional portable computers, as described above, the display data storage device is shared and displayed on each display device. Because it can only display the same data, it not only cannot take advantage of the advantages of having multiple display devices, such as displaying completely different data on display devices of different orders, but also cannot be applied to display devices of different sizes. There was a problem.

The present invention was made to solve these problems, and it is possible to display different data on each display device, and also to display completely different data on display devices of different sizes. The aim is to obtain a portable computer.

[Means for Solving the Problems] FIG. 1 is a block diagram showing a portable computer according to the present invention. This portable computer includes display devices (10) and (11) each having a display data storage device.
, (12), control means (13), (14), (15) for respectively controlling a plurality of display devices, and a control means having an address corresponding to the display means and corresponding to the display device having the corresponding address. screen control means for selecting (1)
B), and address rewriting means (22) for rewriting the address in the screen control means according to a request.

Furthermore, the screen control means includes a subroutine (31) corresponding to the content displayed on the screen, a subroutine group (38) provided for each display device, and a subroutine group (38) corresponding to the subroutine and its subroutine group (88). [Operation] In the present invention, a control means is selected according to the address of the screen control means (16), and a display device (10) corresponding to the control means is stored. , (11), and (12) perform data display according to data in their respective display data storage devices.

When changing the display device, the corresponding address of the screen control means is rewritten by the address rewriting means (22). At this time, the address of subroutine (31) is
The subroutine group (38) of the corresponding display device is rewritten according to the address in the address table (35). Then, the control means corresponding to that address is selected, and the display devices (10) and (11) corresponding to the control means are selected.
) and (12) perform data display according to the data in the respective display data storage devices.

[Example] Embodiments of the present invention will be described below based on the drawings.

FIGS. 2A and 2B are external views of a portable computer according to an embodiment of the present invention. The one shown in FIG. 2 (CA) includes a large display section (1), a touch panel type display section (3), and a keyboard section (4). On the other hand, Figure 2 (B
) is equipped with a small display section (2), a touch panel type display section (3), and a keyboard section (4).

The large display section (1) and the small display section (2) can each be removed from the main body, and the small display section (2) can be attached in place of the large display section (1), or vice versa. A large display section (1) can be attached in place of the display section 1, and furthermore, the structure is such that it is not necessary to attach either one if it is not necessary.

The touch panel type display unit (3) is a touch panel type display body, and can be used as a display device and a keyboard at the same time. The large display section (1) or the small display section (2) and the touch panel type display section (3) can be attached at the same time.

FIG. 3 is a block diagram showing the screen switching mechanism of the portable computer according to the above embodiment. In the figure, (10
), <11), and (12) are display devices, and each of the display devices (10), (11), and (12) includes a display device 81, a screen control device, and a display data storage device C, respectively. . (+3), (14), and (15) are display device control means (hereinafter referred to as control means) for the display devices (10), (11), and (12), respectively;
) is a screen control means, which selects the control means (13), (14), and (15) according to the screen output request (17) and outputs to each display device. That is, the screen control means (16)
is a means that serves as a so-called switch and is provided to output an output request from the screen output request (17) to the currently selected display device, and each control means (13), ( 14).

(15) is called.

(22) is an address rewriting means that is called and operated from a device change request (21) or when an application program is started, and rewrites the address of the screen control means (16). This address rewriting means (22
) is a mounting determination means (20) that performs a mounting check of the requested display device, a device means (19) that determines a device based on the mounting determination means (20), and a device that is the output of the device means (19). It is provided with address conversion means (18) for rewriting the address of the screen control means (16) in accordance with the above.

Next, the operation of the portable computer configured as described above will be explained based on the flowcharts shown in FIGS. 4 and 5.

Figure 4 shows address rewriting means (2) at program startup.
This shows the operation 2), in which the display device is determined by automatically rewriting the address without depending on the operator's instructions.

When you start the program after attaching one or two of the display devices (10), (11), and (13) to the main body, the program first determines the attached display device. Then, the display device currently attached is known (Sl). If no display device is attached, or if a display device other than the above display devices (10), (11), and (13) is attached (S2), the most common display device, e.g. The process proceeds assuming that the display device (1G) (device 1) is attached (S3). In order to save the trouble of checking whether the display device is installed when changing the display destination from the next time onward, information about the display device that is currently installed is memorized (S4
).

Next, based on the information obtained through the steps up to this point,
If there are multiple display devices, display device (lO) → (11)
→ (12), if there is one, it is determined as the first display device (S5).

After deciding on the display device, set the screen size and
Initialize all variables necessary for screen control such as the number of pages (
S6). Thereafter, all subroutine call addresses in the screen control means (16) are rewritten (S7). The details of rewriting this address will be described later (Figure 6).
.

FIG. 5 is a flowchart showing an example of processing when changing the display device during program execution.

When control is transferred to this process in response to an operator's device change request (21), the target display device is first determined (S8
). Thereafter, it is checked whether the target display device is the same as the currently selected device (S9), and if the same device is specified, the following process is omitted.

If a later display device other than the currently selected display device is specified, check whether the target device is currently attached based on the attachment information stored in step S4 of FIG. is checked (S10). If the target device is not installed, an error message will be displayed (516) because it cannot be changed, the following processing will be omitted, and the current state will be saved.

When the target display device is attached, a flag indicating that it is currently selected is turned on (S11), and the subroutine call address of the screen control means (16) is rewritten (S12). The details of this rewriting will also be described later (FIG. 6).

Thereafter, the contents of the screen control variables selected before the change are saved for the next selection (S13).

Next, it checks whether the selected display device is the first selection (514), and if the desired display device has been used before, the previous screen information is saved by the process of step 313 above. Therefore, it is returned to each variable (S15).

On the other hand, 1. In the case of the first selection after starting the program, the previous variables are not saved, so each variable is initialized (S17
). When the above processing is completed, the process moves to the next processing.

FIG. 6 is a diagram explaining the address rewriting method in steps S7 and S12.

The program includes a main processing part (30) unrelated to the type of display device, a subroutine group (38) that manages output and screen information for the display device (10), and a subroutine group (39) for the display device (11). ), a subroutine group (4o) for the display device (13), and a table (35), (3B) of subroutine addresses of the subroutine groups (38), (39), and (40),
(37), and a processing section (31) that receives subroutine calls from the main processing section (30) and distributes them to dedicated subroutines for each device.

The rewrite routine is called at the above steps S7 and S12 addresses, and based on the device determination in step S5 or the selection flag information set in step S11,
The display device subroutine to be selected is determined. for example,
When a display device (lO) is selected, an address table (35) is selected that includes the addresses of all subroutines in a subroutine group (38) corresponding to the display device (10). Then, the address data in the address table (35) is sequentially read out, and the call addresses of the subroutines in the data processing section (31) are rewritten in order from the top.

As a result, from the main processing part (80) to subroutine 5.
When UBI is called, the called 5UB1 (32
) will automatically call 5UB1 in the subroutine group (38).

Similarly, if the display device (11) is specified,
The second address table (36) is selected, address data is sequentially read out in the same way as above, and the call addresses of subroutines in the data processing section (31) are rewritten in order from the top. As a result, when subroutine 5UBI is called from the main processing part (30), the called SUB1 (32) automatically executes the subroutine group (32).
39) will be called.

By preparing a subroutine group and an address table for each display device as described above, any number of display devices can be individually controlled.

[Effects of the Invention] As explained above, according to the present invention, a plurality of display devices can perform arbitrary display based on the data in the data storage device for each display. In addition to being able to display data, it is also possible to arbitrarily select and display data on devices with different display conditions, such as a large display device and a small display device.

Furthermore, selecting a display device can be done extremely simply by simply rewriting the address of the screen control means.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the configuration of the present invention, Figure 2 (A
)(B) is an external view of a portable computer according to an embodiment of the present invention, FIG. 3 is a block diagram showing the display device switching mechanism of the embodiment, and FIGS. 4 and 5 are diagrams showing the display device switching mechanism. FIG. 6 is an explanatory diagram showing the address rewriting method. (10), (11), (12)...display device (13
), (14), (14)...Display device control device (16
)...Screen control means (22)...Address rewriting means agent Patent attorney Souji Sasaki Diagram;

Claims (2)

[Claims] (1) A plurality of display devices each having a display data storage device, a control means provided corresponding to each display device to control the display device, and an address corresponding to the display means, and displaying the corresponding address. 1. A portable computer comprising: a screen control means for selecting a control means corresponding to the device; and an address rewriting means for rewriting an address in the screen control means according to a request. (2) The screen control means includes a first subroutine corresponding to the screen display content, a subroutine group provided for each display device, and storing a subroutine group corresponding to the subroutine and an address table for calling the subroutine group.
Portable computers as described in Section.