JP2007241492A - Electronic apparatus, display control method and display control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus, a display control method and a display control program, capable of performing display update without making a user feel stress by use of a small-capacity memory when a plurality of instructions are continuously input by the user. <P>SOLUTION: The electronic apparatus has: an operation means for inputting the instructions by the user; a display; and a display control means making the display display an image according to the instructions, and making the display display the image according to a part of the selected instructions including at least the finally input instructions of a continuously input instruction group when the plurality of instructions are continuously input. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electronic device, a display control method, and a display control program.

  In an electronic device having a display such as a liquid crystal panel and a function for displaying various information such as characters and images, it is based on bitmap-format image data held in a memory area generally called a frame memory. Characters and images are displayed on the display. For example, when encoded image data is a display target, the image is displayed by being decoded into bitmap-format image data and transferred to the frame memory. In this case, in order to buffer the difference between the decoding processing speed and the transfer speed to the frame memory, or to hold the image data in the generation process, a memory area different from the frame memory (hereinafter referred to as a buffer memory). Is generally used. By the way, when the display update request is continuously generated, the generation of the image data and the transfer to the frame memory are repeated in a short time for the number of requests that have occurred. In spite of switching to the next image in an instant, it is inefficient to generate image data and transfer it to the frame memory in order to display the image on the display. Further, if a delay occurs until an image to be finally displayed is displayed, the user feels that the response of the display display update to his / her own operation is slow. If only one screen area is secured in the buffer memory, it is necessary to generate the next image data after completing the transfer of the image data from the buffer memory to the frame memory. I cannot expect a reduction in delay. When the buffer memory for multiple screens is provided, the image data of the next screen can be drawn in another buffer memory during image data transfer to the frame memory, so it is compared with a configuration in which only one screen is secured for the buffer memory. Then, although the above delay is shortened, there is a problem that the required memory size increases.

JP-A-5-53749

  The present invention relates to an electronic device, a display control method, and a display capable of realizing display updating using a small-capacity memory without causing the user to feel stress when a plurality of user instructions are continuously input. An object is to provide a control program.

(1) An electronic device for achieving the above object is an operation means for inputting an instruction by a user, a display, and a means for displaying an image on the display in response to the instruction, wherein the instruction is continuously Display control means for displaying, on the display, an image corresponding to a part of the selected instructions including at least the last input instruction among a group of instructions input continuously;
According to this electronic apparatus, when a plurality of instructions by the user are continuously input, an image corresponding to a part of the selected instructions including at least the last instruction input from the input instruction group is displayed on the display. Therefore, the image corresponding to the last input instruction can be displayed on the display earlier than the configuration in which images are sequentially displayed on the display in accordance with all of the input instruction groups. Therefore, it is possible to reduce the stress that the user feels due to the delay in updating the display on the display as a response to the user's own operation.

(2) In the electronic device for achieving the above object, when three or more instructions are continuously input, the display control means is the instruction input first in the instruction group continuously input. After the image is displayed on the display according to the input, the nth input is performed without displaying the image on the display according to the instructions input from the second to the (n−1) th (n ≧ 3). An image may be displayed on the display according to an instruction.
According to this electronic device, when three or more instructions are continuously input, an image is displayed on the display in accordance with the instruction input first among the instruction groups continuously input. Since the image is displayed on the display according to the last input instruction without displaying the image on the display according to the input instruction, the user can start the operation continuously from the time when the user starts the operation. Reducing stress felt by the user by not updating the display from the image that was displayed before the continuous operation was started before the image corresponding to the last operation was displayed on the display Can do.

(3) An electronic device for achieving the above object includes a frame memory for holding image data of an image displayed on the display, and a buffer memory for holding image data stored in accordance with the selected instruction. And may be further provided. The display control means does not store the image data corresponding to the instruction group in the buffer memory in accordance with the instruction group input during the transfer of the image data from the buffer memory to the frame memory. After completion of the transfer of the image data from the buffer memory to the frame memory, the image data corresponding to a part of instructions including the instruction inputted last in the instruction group is stored in the buffer memory, and the stored data The image may be displayed on the display by transferring the image data to the frame memory.
According to this electronic device, when a plurality of instructions are continuously input, the period during which image data corresponding to the first input instruction is being transferred from the buffer memory to the frame memory depends on the newly input instruction. The image data is not stored in the buffer memory, and after the transfer of the image data corresponding to the first input instruction to the frame memory is completed, a part including at least the last instruction among the instruction groups input during the transfer The image data corresponding to the instruction is stored in the buffer memory and transferred to the frame memory, whereby an image is displayed on the display. Therefore, it was displayed before the continuous operation was started from the time when the user started the continuous operation until the image corresponding to the last operation performed by the user was displayed on the display. The stress felt by the user can be reduced by not updating the display in response to the user's operation from the image. Further, during transfer of image data to the frame memory, even if an instruction is input, image data corresponding to the instruction is not transferred to the frame memory, so there is no need to provide a buffer memory for a plurality of screens. Note that the next image data transfer is not performed until the transfer of the image data to the frame memory is complete. In the configuration having only one frame memory, the image displayed on the display is a frame. Since it is displayed based on the image data stored in the memory, if the transfer of the image data to the frame memory stops halfway, it will be displayed even for a short period based on the image data transferred halfway This is because it is not preferable in terms of product specifications.

(4) An electronic device for achieving the above object issues a display update request for causing the display control means to display an image corresponding to an instruction input by the operation means to the display control means, and at least finally Display update request means for storing a group of issued display update requests including the displayed display update request may be further provided. When the display control unit receives the display update request during the transfer of the image data from the buffer memory to the frame memory, the display control unit issues a display update request reissue request to the display update request unit after the transfer is completed. May be. Upon receiving the reissue request, the display update request means selects a part of the stored display update request group that has been stored, and sequentially reissues the selected display update requests to the display control means. May be.
According to this electronic device, a group of issued display update requests including at least the last issued display update request is stored, and finally issued in response to a reissue request after completion of transfer of image data being transferred to the frame memory. Some display update requests including the selected display update request are selected, and the selected display update requests are sequentially reissued. Image data is stored in the buffer memory in response to the display update requests that are sequentially reissued and transferred to the frame memory, whereby an image is displayed on the display. Therefore, from the time when the user starts the operation continuously until the image corresponding to the last operation performed by the user is displayed on the display, the user's operation is started from the image displayed before the continuous operation. The stress felt by the user can be reduced by the display not being updated in response to.

(5) In the electronic device for achieving the above object, when the display update request unit receives the reissue request, the display update request issued last among the stored display update requests stored therein May be selected and reissued to the display control means.
According to this electronic device, at least the last display update request group including the display update request issued last is stored, and finally, in response to the reissue request after the transfer of the image data being transferred to the frame memory, Select the issued display update request and reissue it. In response to the reissued display update request, the image data is stored in the buffer memory and transferred to the frame memory, whereby an image is displayed on the display. Therefore, an image corresponding to the last input instruction can be quickly displayed on the display as compared with a configuration in which images are sequentially displayed on the display according to all the input instruction groups. Therefore, it is possible to reduce the stress that the user feels due to the delay in updating the display on the display as a response to the user's own operation.

(6) In the display control method for achieving the above object, an instruction from a user is input, an image is displayed on a display in accordance with the instruction, and a plurality of the instructions are continuously input. Including displaying on the display an image corresponding to a part of the selected instruction including at least the instruction inputted last in the instruction group.
According to this display control method, when a plurality of instructions by the user are continuously input, an image corresponding to a part of the selected instructions including at least the last instruction input from the input instruction group is displayed on the display. Since the images are displayed, the image corresponding to the last input instruction can be displayed on the display faster than the case where images are sequentially displayed on the display in accordance with all of the input instruction groups. Therefore, it is possible to reduce the stress that the user feels due to the delay in updating the display on the display as a response to the user's own operation.

(7) A display control program for achieving the above object is an operation means for inputting an instruction by a user and a means for displaying an image on a display in response to the instruction, and a plurality of the instructions are continuously input. Then, the computer is caused to function as display control means for causing the display to display an image corresponding to a part of the selected instruction including at least the instruction input last in the instruction group continuously input.
According to the display control program of the present invention, when a plurality of instructions by the user are continuously input, an image corresponding to the selected instruction including at least the instruction input last from the input instruction group is displayed. Since it is configured to be displayed on the display, an image corresponding to the last input instruction can be quickly displayed on the display as compared to a configuration in which images are sequentially displayed on the display according to all of the input instruction groups. it can. Therefore, it is possible to reduce the stress that the user feels due to the delay in updating the display on the display as a response to the user's own operation.

  Each function of the plurality of means provided in the present invention is realized by hardware resources whose functions are specified by the configuration itself, hardware resources whose functions are specified by a program, or a combination thereof. Further, the functions of the plurality of means are not limited to those realized by hardware resources that are physically independent of each other. The order of each operation of the claimed method is not limited as long as there is no technical impediment, and may be executed in any order, or may be executed simultaneously. .

Hereinafter, an embodiment of the present invention will be described based on an example.
FIG. 2 is a block diagram showing a hardware configuration of the electronic apparatus according to the present invention.
The external memory controller 95 is connected to a removable memory 96 inserted from a card slot (not shown). Data stored in the removable memory 96 is read by the external memory controller 95 and transferred to the RAM 74. Photo image data to be displayed or printed is stored in a removable memory 96 in a state encoded in JPEG format, TIFF format, or the like.
The communication unit 93 is a communication interface for the control unit 72 to communicate with an external system such as a PC. The communication unit 93 communicates with an external system through a LAN, the Internet, a USB, or the like, and acquires data stored in a hard disk, a compact disk, or the like. Image data to be displayed or printed may be stored in an external hard disk, compact disk, or the like.

  The digital image processing unit 80 performs image processing such as gamma correction, shading correction, color balance correction, JPEG format image data decoding, resolution conversion, unsharp processing, gradation correction, halftoning, and color separation processing with the CPU 78. It is a DSP that executes in cooperation. The digital image processing unit 80 converts the format of the image data output from the scan unit 50 and the image data read by the external memory controller 95 into a format suitable for printing.

  The control unit 72 as a display control unit, a display update request unit, and an operation unit includes a ROM 76, a CPU 78, and a RAM 74. The CPU 78 executes a control program stored in the ROM 76 and controls each part of the electronic device 1. The ROM 76 is a non-volatile memory that stores a control program and a display control program. The RAM 74 is a volatile memory that temporarily stores control programs, image data to be displayed and printed, and data to be processed by the CPU 78. The processing target data stored in the RAM 74 includes an issued display update request management table, a display update non-execution flag, and the like which will be described later. The buffer memory 73 is used for temporarily storing image data to be displayed on the FPD 88. The control program and the display control program may be stored in the ROM 76 via a network from a remote server, or may be stored in the ROM 76 via a computer-readable recording medium such as the removable memory 96.

The operation panel 68 includes an FPD (Flat Panel Display) 88 for displaying a menu and a status corresponding to the mode, a display driver (DSPD) 86 for driving the FPD 88, a mode change, a menu operation, and a print start request. Is composed of a push button group 82 and the like. The push button group 82 corresponds to the operation means described in the claims. The screen of the FPD 88 is transferred to the frame memory 85 and displayed by the DSPD 86 driving the FPD 88 based on the stored image data. The DSPD 86 functions as display control means described in the claims. The FPD 88 corresponds to the display described in the claims. The frame memory 85 may be secured as a partial area of the RAM 74.
The hardware configuration of the electronic device 1 has been described above. Next, the logical configuration of the electronic device 1 will be described.

FIG. 3 is a block diagram showing a logical configuration of the electronic device 1.
The application module 100 is a program component that causes the control unit 72 to function as a display update request unit. The application module 100 issues a display update request in response to various instructions input by the push button group 82, an error occurrence, and a status change of the electronic device 1 associated therewith. The issued display update request including at least the last issued display update request is stored in the RAM 74 as an issued display update request management table and is referred to by the application module 100.

  The display control module 102 is a program component that causes the control unit 72 to function as display control means. The display control module 102 stores image data for displaying an image corresponding to the selected display update request on the FPD 88 in the buffer memory 73. When the storage of the image data corresponding to the display update request is completed, a transfer request is issued to the DSPD 86 and the image data held in the buffer memory 73 is transferred to the frame memory 85.

FIG. 4 is a sequence diagram for explaining a comparative example of the present embodiment. In this comparative example, the processing sequence when the display update requests R200, R204, and R206 are continuously issued in a state where the transfer of the image data corresponding to the display update request issued before the display update request R200 is completed. Show. This comparative example includes buffer memory areas for a plurality of screens.
In step S <b> 200, when the display update request R <b> 200 for image A issued from the application module 100 is received, the display control module 102 executes processing for storing the image data of image A in the buffer memory 73. Specifically, for example, JPEG format image data (image A) read from the removable memory 96 to the RAM 74 is decoded, and the decoded image data (image A) is stored in the first buffer memory. When the storage in the first buffer memory is completed, a transfer request R202 from the first buffer memory to the frame memory 85 for the DSPD 86 is issued. Specifically, for example, the image data (image A) stored in the first buffer memory is transferred to the DSPD 86. When the transfer to the frame memory 85 is completed, the image A is displayed on the FPD 88.

In step S202, when the display update request R204 to the image B issued from the application module 100 is received, the image data of the image A is held in the display control module 102 because the image data of the image A is being transferred. A process of storing the image data of the image B in a different area (second buffer memory) from the existing area is executed.
In step S204, when the display update request R206 for the image C issued from the application module 100 is received, the image data for the image A is being transferred in the display control module 102. Therefore, the image data for the images A and B is transferred. Is stored in an area (third buffer memory) different from the area in which the image C is held.
When a transfer completion notification R208 is notified from the DSPD 86, the display control module 102 executes a process of sequentially transferring untransferred image data stored in the second buffer memory and the third buffer memory to the frame memory 85. (R210, R212, R214, R216).

  In the sequence described above, when a display update request is issued continuously, images corresponding to the issued requests are displayed on the FPD 88, and the number of times image data is generated and transferred to the frame memory 85 is determined by the issued request. Increase by a few minutes. In order to display the image on the FPD 88 in spite of switching to the next image in an instant, it is inefficient and finally displayed to generate the image data and transfer it to the frame memory 85. There is a delay before the power image is displayed. The configuration in which the buffer memory 73 has only one screen area is a memory-saving configuration because it is necessary to generate the next image data after the transfer of the image data from the buffer memory 73 to the frame memory 85 is completed. The above delay reduction cannot be expected. The comparative example described with reference to FIG. 4 is configured to include a buffer memory 73 for a plurality of screens, and the next image data can be drawn in another buffer memory 73 during the image data transfer to the frame memory 85. Therefore, compared with a configuration in which the buffer memory 73 is ensured for only one screen, the delay is reduced, but the required memory size is increased.

FIG. 1 is a sequence diagram for explaining a display control sequence according to the present embodiment. The processing sequence when the display update requests R100, R104, and R106 are continuously issued in a state where the transfer of image data corresponding to the display update request issued before the display update request R100 is completed is shown.
In step S <b> 100, when the display update request R <b> 100 for the image A issued from the application module 100 is received, the display control module 102 executes processing for storing the image data of the image A in the buffer memory 73. Specifically, for example, JPEG format image data (image A) read from the removable memory 96 to the RAM 74 is decoded, and the decoded image data (image A) is stored in the buffer memory 73. When the storage in the buffer memory 73 is completed, a transfer request R102 to the frame memory 85 for the DSPD 86 is issued to cause the DSPD 86 to transfer the image data (image A) stored in the buffer memory 73. When the transfer to the frame memory 85 is completed, the image A is displayed on the FPD 88. Note that the image data before being stored in the buffer memory 73 may not be encoded. Further, character image data, icon image data, or the like may be combined with the image data stored in the buffer memory 73.

In step S101, a display update request R100 for image A is stored. Specifically, for example, a display update request R100 for image A is stored in an issued display update request management table for holding a predetermined number of issued display update requests. Note that only one display update request may be held in the issued display update request management table.
In step S102, when the display update request R104 to the image B issued from the application module 100 is received, the image data of the image A is being transferred in the display control module 102, so the image data of the image B is stored in the buffer memory. Without being stored in 73, it is stored that a display update request has been issued during transfer. Specifically, for example, a display update non-execution flag is set.
In step S103, a display update request R104 for image B is stored. Specifically, the display update request R104 for the image B is stored in the issued display update request management table.

When the display update request R106 to the image C issued from the application module 100 is received, the image data of the image A is being transferred in the display control module 102, and therefore the image data of the image C is not stored in the buffer memory 73. . The display update non-execution flag is set at this time.
In step S104, a display update request R106 for the image C is stored. Specifically, the display update request R106 for the image C is stored in the issued display update request management table.

When the completion of the transfer of the image data of the image A is notified from the DSPD 86, a display update request reissue request R110 is issued from the display control module 102 to the application module 100.
In step S106, the display update non-execution flag is reset.
In step S107, the display update request R112 for the image C is selected from the display update request group stored in the issued display update request management table and reissued.

In step S <b> 108, processing for storing the image data of the image C in the buffer memory 73 is executed in response to the display update request for the image C issued from the application module 100.
When the storage of the image data of the image C in the buffer memory 73 is completed, a transfer request R114 of the image data of the image C is issued to the DSPD 86, and when the transfer is completed, the image C is displayed on the FPD 88. When the transfer is completed, the display control module 102 is notified of the completion of transfer of the image data of the image C.

  As described above, according to the present embodiment, when a plurality of instructions by the user are continuously input, a period in which image data corresponding to the instruction input first is being transferred from the buffer memory 73 to the frame memory 85. The image data corresponding to the newly input instruction is not stored in the buffer memory 73, and the instruction group input during transfer after the image data corresponding to the first input instruction is transferred to the frame memory 85. Among them, image data corresponding to at least a part of instructions including the last instruction is stored in the buffer memory 73 and transferred to the frame memory 85, whereby an image is displayed on the FPD 88. Therefore, an image corresponding to the last input instruction can be displayed earlier compared to a configuration in which images are sequentially displayed on the FPD 88 according to all the input instruction groups. Therefore, the stress felt by the user due to the delay in updating the display of the FPD 88 as a response to the user's operation can be reduced. In addition, the display update of the FPD 88 is performed as a response to the user operation from the time when the user starts the operation continuously until the image corresponding to the last operation performed by the user is displayed on the FPD 88. It is possible to reduce the stress felt by the user due to the absence. Further, during the transfer of the image data to the frame memory 85, even if an instruction is input, the image data corresponding to the instruction is not transferred to the frame memory 85. Therefore, it is not necessary to provide the buffer memory 73 for a plurality of screens.

  FIG. 5 is a schematic diagram for explaining the effect of the present invention. This is an example in which a plurality of encoded image data is displayed on the screen of the FPD 88 by operating the “right” button of the push button group 82, and the image N1 is displayed continuously on the FPD 88. The screen transition of the FPD 88 when the “right” button is operated five times is shown. FIG. 5A shows transition of the screen of the FPD 88 when the sequence of FIG. 4 described as a comparative example of the present embodiment is executed. FIGS. 5B, 5C, and 5D show the transition of the screen of the FPD 88 when the sequence of the present embodiment is executed. As shown in FIG. 5A, images are sequentially displayed according to the number of times the “right” button is operated. However, since the images are displayed even when switching to the next image in an instant, it is inefficient. In addition, the user feels stress because there is a delay between the user's button operation and the screen update timing. In FIG. 5B, after the image N2 is displayed in response to the first “right” button operation, the image N6 is displayed in response to the last “right” button operation. In FIG. 5C, after the image N2 is displayed according to the number of operations of the first “right” button, the image N4 is displayed according to the operation of the third “right” button, and the last “right” button. The image N6 is displayed according to the operation. As shown in FIG. 5D, the image N6 may be displayed only in response to the last “right” button operation among the continuous operations. However, as shown in FIGS. By reducing the delay in timing between the button operation and the update of the screen of the FPD 88 as a response, it is possible to prevent the user from being stressed.

  The present invention is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof. For example, the present invention can be applied to all electronic devices having a display such as a stand-alone printer, a digital camera, a photo viewer, and a personal computer.

The sequence diagram which concerns on one Example of this invention. The block diagram which concerns on one Example of this invention. The block diagram which concerns on one Example of this invention. The sequence diagram which concerns on one Example of this invention. The schematic diagram which concerns on one Example of this invention.

Explanation of symbols

1: Electronic device, 68: Operation panel, 72: Control unit, 73: Buffer memory, 74: RAM, 76: ROM, 78: CPU, 80: Digital image processing unit, 82: Push button group (operation means), 85 : Frame memory, 86: DSPD (display control means), 88: FPD (display), 93: Communication unit, 95: External memory controller, 96: Removable memory, 100: Application module (display update request means), 102: Display Control module (display control means)

Claims (7)

An operation means for inputting a user instruction;
Display,
A means for displaying an image on the display in response to the instruction, and when a plurality of the instructions are continuously input, a selection is made that includes at least the instruction input last in the instruction group input continuously. Display control means for displaying an image corresponding to a part of the instruction on the display;
Electronic equipment comprising. When three or more instructions are continuously input, the display control means displays an image on the display in accordance with the instruction input first among the instruction groups input continuously, and then 2 Display an image on the display in response to the nth input instruction without displaying an image on the display in response to the instruction input from the nth to the (n−1) th (n ≧ 3).
The electronic device according to claim 1. A frame memory for holding image data of an image displayed on the display;
A buffer memory for holding image data stored in response to the selected instruction,
The display control means does not store the image data corresponding to the instruction group in the buffer memory in accordance with the instruction group input during the transfer of the image data from the buffer memory to the frame memory. After completion of the transfer of the image data from the buffer memory to the frame memory, the image data corresponding to a part of instructions including the instruction inputted last in the instruction group is stored in the buffer memory, and the stored data Displaying an image on the display by transferring image data to the frame memory;
The electronic device according to claim 1. A display update request group that has issued a display update request for causing the display control means to display an image in accordance with an instruction input by the operation unit, and includes at least the last display update request issued Display update request means for storing
When the display control unit receives the display update request during the transfer of the image data from the buffer memory to the frame memory, the display control unit issues a display update request reissue request to the display update request unit after the transfer is completed. ,
Upon receiving the reissue request, the display update request means selects a part of the stored display update request group that has been stored, and sequentially reissues the selected display update requests to the display control means. To
The electronic device according to claim 3. When the display update request unit receives the reissue request, the display update request unit selects the display update request issued last among the stored display update requests, and reissues the display control unit.
The electronic device according to claim 4. Enter user instructions,
In response to the instruction, an image is displayed on the display, and when a plurality of the instructions are continuously input, the selected instruction including at least the instruction input last is included in the instruction group continuously input. A corresponding image is displayed on the display.
A display control method. An operation means for inputting a user instruction;
A means for displaying an image on a display in response to the instruction, and when a plurality of the instructions are continuously input, a selected one including at least the instruction input last is selected from the group of instructions input continuously. Display control means for causing the display to display an image corresponding to the instruction of the unit;
Display control program that allows the computer to function.

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