JP5181708B2 - Image rewriting control device, information display device, and program - Google Patents

Description

  The present invention relates to a technique for improving the operability of an information display device.

  An information display device using a memory display element such as an electrophoretic display element is known. Since the memory-type display element does not require refresh driving for holding the display, it has a display quality close to that of paper and is easy on the eyes. Taking advantage of these features, devices called electronic books or electronic papers have been developed that can be used to read relatively long documents.

  The image displayed on the electronic paper is rewritten according to a user instruction. For example, Patent Document 1 discloses a method of rewriting display contents in an electrophoretic display device. However, according to the method described in Patent Document 1, an afterimage may be generated on the display unit. As a technique for reducing afterimages, a technique described in Patent Document 2 is known. Patent Document 2 discloses performing rewriting by a plurality of driving steps, such as providing a period during which the display unit is white and a period during which the display unit is black.

JP 2002-149115 A JP 2007-206471 A

  When rewriting is performed by a plurality of driving steps, the time required for rewriting becomes long. For example, consider a case where a user gives an instruction to turn a page in electronic paper. During the rewriting process from the first image to the second image, when the user instructs further rewriting to the third image, rewriting from the second image to the third image is performed for the second image. It starts after the rewriting process is completed. This means that the response to the user's instruction is slow.

  On the other hand, the present invention provides a technique for improving the response of rewrite processing to an interrupt such as an instruction from a user.

The present invention performs rewrite processing for rewriting an image displayed on the display means from a first image to a second image by sequentially executing a plurality of driving steps including a step of refreshing the display of the display means. When an interrupt for instructing rewriting to the third image occurs during execution of the rewriting means and the rewriting process, a driving step after the driving step being executed among the plurality of driving steps and at the timing of the interrupt Control means for controlling the rewriting means to perform the rewriting process for the second image until a designated driving step determined accordingly, and to perform the rewriting process for the third image from a driving step subsequent to the designated driving step. An image rewriting control device is provided.
According to this image rewriting control device, when an interruption occurs, the rewriting process to the third image is started from the step following the specific step.

In a preferred aspect, the control means operates in one of a plurality of operation modes including a first operation mode and a second operation mode, each having a different designated drive step, and the operation mode is the first operation mode. In the case of the operation mode, the designated drive step may be a drive step after the step of performing a process of displaying the second image on the display means.
According to this image rewriting device, the image rewriting process corresponding to the interrupt is performed according to the operation mode.

In another preferable aspect, the operation mode may be switched according to a timing at which the interrupt is generated.
According to this image rewriting device, the operation mode is switched according to the timing at which an interrupt occurs.

In still another preferred aspect, the operation mode may be switched according to the second image or the third image.
According to this image rewriting device, the operation mode is switched according to the second image or the third image.

In still another preferred aspect, the image rewriting control device includes: an output unit that outputs a signal indicating that each driving step is completed each time the plurality of driving steps are completed; and Input means for inputting a signal indicating that the rewriting process should be interrupted.
According to this image rewriting device, a signal indicating that each driving step is completed is output.

In still another preferred embodiment, the display means may include an electrophoretic display element.
According to this image rewriting device, when an interruption occurs, rewriting processing to the third image in the electrophoretic display device is started from the step subsequent to the specific step.

The present invention also provides an information display device comprising any one of the above image rewrite control devices and the display means.
According to this information display device, when an interrupt occurs, the rewriting process to the third image is started from the step subsequent to the specific step.

Furthermore, the present invention provides a computer apparatus having a rewriting unit for rewriting an image displayed on the display unit, wherein the rewriting unit sequentially executes a plurality of driving steps, whereby the image displayed on the display unit is first displayed. A rewrite drive step for performing a rewrite process for rewriting the image from the second image to the second image, and when an interrupt for instructing rewrite to the third image occurs during the rewrite process, the current drive is being executed among the plurality of drive steps. The rewriting process is performed on the second image until a designated driving step determined after the driving step, which is determined according to the timing of the interruption, and the third image is performed from the driving step next to the designated driving step. And a control step for controlling the rewriting means to perform the rewriting process. To provide that program.
According to this program, when an interrupt occurs, the rewriting process to the third image is started from the step following the specific step.

1. Configuration FIG. 1 is a diagram showing a functional configuration of an information display apparatus 1 according to an embodiment of the present invention. The operation means 20 outputs a signal corresponding to a user operation. The interrupt processing unit 30 outputs an interrupt signal for instructing generation of an image to be displayed to the image generation unit 40 in accordance with the signal output from the operation unit 20. In response to the interrupt signal, the image generation unit 40 generates image data indicating an image to be displayed, and stores the generated image data in the storage unit 50. Further, the image generation unit 40 outputs a command for causing the image rewrite control device 10 to display an image on the display unit 60. Upon receiving this command, the image rewrite control device 10 reads the image data from the storage unit 50 and causes the display unit 60 to display an image according to the image data.

  The image rewriting control device 10 is a device that controls rewriting of an image on the display unit 60, that is, a device that drives the display unit 60. The image rewrite control device 10 has the following configuration in detail. The rewriting unit 11 performs a rewriting process of rewriting the image displayed on the display unit 60 from the first image to the second image by sequentially executing a plurality of driving steps. Here, the plurality of driving steps include a step of refreshing the display of the display means 60. When an interruption for instructing rewriting to the third image occurs during execution of the rewriting process, the control unit 12 performs the rewriting process for the second image up to the designated driving step, and the second driving step after the designated driving step is performed. The rewriting means 11 is controlled to perform the rewriting process for the third image. Here, the “designated driving step” is a driving step after the driving step being executed among the plurality of driving steps, and is a driving step determined according to the timing of interruption. The output means 13 outputs a signal indicating that each driving step is completed each time a plurality of driving steps are completed. A signal indicating that the rewriting process should be interrupted at the designated drive step is input to the input means 14.

  The operation mode determination unit 70 determines the operation mode of the image rewrite control device 10. The image rewriting control device 10 (more specifically, the rewriting means 11) operates in one operation mode among a plurality of operation modes. The plurality of operation modes have different designated drive steps, a first operation mode in which a second image is displayed regardless of an interrupt, and a second operation mode in which a second image is not displayed in response to the interrupt. Including. When the operation mode is the first operation mode, the designated drive step is a drive step after the step of performing a process of displaying the second image on the display unit 60. The operation mode determination unit 70 switches the operation mode according to the user instruction, the timing when the interruption occurs, the second image or the third image.

  FIG. 2 is a diagram illustrating a hardware configuration of the information display device 1. In this example, the information display device 1 is electronic paper. A CPU (Central Processing Unit) 101 is a control device that controls components of the information display device 1. A ROM (Read Only Memory) 102 is a non-volatile storage device that stores programs and data necessary for starting the information display device 1. A RAM (Random Access Memory) 103 is a storage device that functions as a work area when the CPU 101 executes a program. A video random access memory (VRAM) 104 is a storage device that stores data indicating an image to be displayed on the display body 107 (hereinafter referred to as “main image”). The VRAM 104 has a main image storage area, and the main image is stored in the storage area. An I / O (Input / Output) 105 is an interface for managing input / output of data and signals. A UI (User Interface) button group 106 is a device that outputs a signal according to a user's operation, for example, a button (rewrite button, page feed button, determination button, etc.), keypad, wheel, lever, touch panel, pen. This is an input device including an operator such as a device. The auxiliary storage device 115 is a storage device that stores data that can be displayed on the display unit 107. The UI button group 106 is connected to the I / O 105, and a signal output from the UI button group 106 is input to the CPU 101 via the I / O 105.

  The display body 107 is an electrophoretic display (hereinafter referred to as “EPD”) having an electrophoretic display element. The display control unit 108 is a device that outputs a signal for performing drawing control of the display body 107. Hereinafter, the display body 107 and the display control unit 108 are collectively referred to as “main display” as necessary. The power on / off circuit 111 is a circuit for supplying and stopping power supply to elements such as the display control unit 108 and the CPU 101. Hereinafter, supplying power to a certain component is referred to as “turning on the power”, and stopping supplying power is referred to as “turning off the power”. The power control unit 112 is a device that performs power management of the information display device 1. Specifically, the power control unit 112 controls the power on / off circuit 111 to turn on or off the power of the display control unit 108 and the CPU 101. Further, the power control unit 112 monitors the remaining amount of the battery 113. The battery 113 supplies power to the components of the information display device 1 such as the display control unit 108, the CPU 101, and the RAM 103. The bus 114 is a transmission path used for signal transmission between components.

  The fingerprint sensor 117 is a device that electrostatically reads a user's fingerprint and outputs a signal indicating an image of the read fingerprint. The fingerprint sensor 117 is connected to the I / O 105, and a signal output from the fingerprint sensor 117 is input to the CPU 101 via the I / O 105.

  The ROM 102 stores a control program for performing processing described below. The function shown in FIG. 1 is implemented in the information display device 1 by the CPU 101 executing this control program. Here, the display control unit 108 is an example of the image rewrite control device 10, the UI button group 106 and the fingerprint sensor 117 are examples of the operation unit 20, the CPU 101 is the interrupt processing unit 30, the image generation unit 40, and the operation mode determination. The VRAM 104 is an example of the storage unit 50, and the display body 107 is an example of the display unit 60.

  FIG. 3 is a diagram illustrating an appearance of the information display device 1. The information display device 1 includes a display surface of the display body 107 and a UI button group 106 on the front surface of the housing.

2. Operation FIG. 4 is a flowchart showing the operation of the information display apparatus 1. The flow in FIG. 4 is started, for example, when the first page of the document is displayed in response to a user instruction. Here, an example will be described in which the operation mode of the image rewrite control device 10 is determined by a user instruction, and the determined operation mode is the second operation mode. In this case, the designated drive step is the drive step that was being executed when the interrupt was detected.

  In step S100, the CPU 101 determines whether an image rewriting instruction has been issued. The CPU 101 determines that a rewrite instruction has been issued based on a signal output from the UI button group 106. When it is determined that a rewrite instruction has not been issued (S100: NO), the CPU 101 waits until a rewrite instruction is issued. If it is determined that a rewrite instruction has been issued (S100: YES), the CPU 101 proceeds to step S110.

  In step S110, the CPU 101 controls the display control unit 108 to change the image displayed on the display body 107 from the first image (currently displayed image) to the second image (image to be displayed next). ) To start rewriting processing.

  FIG. 5 is a diagram illustrating a plurality of driving steps in the rewriting process. In this example, the rewriting process includes three driving steps of Step 1-3. Now, a case where the first image is an alphabetical “H” image and the second image is an “I” image will be described as an example. Step 1 is a reverse image writing step. An “inverted image” refers to an image in which the white portion of the first image is black. When the reverse image is written, the screen of the display body 107 is all black. Step 2 is a full screen white writing step. In step 2, the screen of the display body 107 is all white. Steps 1 and 2 are processes performed to refresh the display on the display unit 107. Step 3 is a new image writing step. In step 3, a second image, which is a new display image, is written. The CPU 101 generates image data necessary for step 1-3, and controls the display control unit 108 to drive the display body 107 according to the generated image data.

  In this example, the display control unit 108 outputs a signal indicating that each step has been completed to the CPU 101 every time each of steps 1-3 is completed. Thereby, the CPU 101 can know which step among the plurality of driving steps is currently being executed by the display control unit 108.

  A description will be given with reference to FIG. 4 again. In step S120, the CPU 101 determines whether an interrupt has been detected. Here, “interrupt” refers to a command for instructing rewriting to a third image different from these images when rewriting processing from the first image to the second image is performed. If no interrupt is detected (S120: NO), the CPU 101 proceeds to step S130. If an interrupt is detected (S120: YES), the CPU 101 proceeds to step S140.

  In step S130, the CPU 101 determines whether the rewriting process has been completed. When it is determined that the rewriting process is completed (S130: YES), the CPU 101 ends the flow of FIG. When it is determined that the rewriting process is not completed (S130: NO), the CPU 101 shifts the process to step S120 again.

  In step S <b> 140, the CPU 101 specifies a drive step that maintains the process for the second image, that is, a “designated drive step”. In this example, the designated drive step is a drive step that was executed when an interrupt occurred (more specifically, when an interrupt was detected). For example, if the display control unit 108 is executing step 2 when an interrupt is detected, step 2 is the designated drive step.

  In step S150, the CPU 101 controls the suspension and restart of the display control unit 108. Specifically, the CPU 101 continues the rewriting process for the second image until the designated driving step, and starts the rewriting process for the third image from the step subsequent to the designated driving step. Control. Here, the “next step” means a step to be executed next to the designated drive step. For example, when step 2 is the designated drive step, the next step is step 3. Alternatively, if step 3 is the designated drive step, step 1 for the second image is the next step.

  FIG. 6 is a diagram schematically showing the processing in step S150. Here, a case where the third image is an alphabet “K” image will be described as an example. If an interrupt is detected when step 1 of the rewriting process for the second image is being executed, the rewriting process is interrupted when step 1 is completed. When the second image rewriting process is interrupted, the third image rewriting process is started from the step next to the interrupted driving step, that is, step 2. In another example, if an interrupt is detected while step 2 of the rewriting process for the second image is being executed, the rewriting process is interrupted when step 2 ends. When the rewriting process of the second image is interrupted, the rewriting process of the third image is started from step 3.

  FIG. 7 is a diagram illustrating a specific operation sequence of the information display apparatus 1. Now, a case where the first image is displayed on the display body 107 will be described as an example. When the user presses the page turning button of the UI button group 106, the UI button group 106 outputs a signal assigned to the page turning button. The CPU 101 detects this signal as an interrupt instructing rewriting to the second image (step S201). When detecting the interrupt, the CPU 101 determines whether the driving of the display control unit 108 needs to be interrupted (step S202). If the display control unit 108 is executing the rewriting process, it is determined that the interruption is necessary. If the rewriting process is not being performed, it is determined that the interruption is not necessary. In this example, the rewriting process is not performed, so it is determined that the interruption is unnecessary.

  If it is determined that the interruption is unnecessary, the CPU 101 generates data indicating the second image that is the next image to be displayed (hereinafter referred to as “second image data”) (step S203). When the second image is generated, the CPU 101 writes the second image data in the VRAM 104 as an image to be displayed next (step S204). The VRAM 104 has a storage area for storing data of the currently displayed image (here, the first image) and the image to be displayed next (second image). When the second image data is written, the CPU 101 outputs a command for instructing the start of the rewriting process, that is, the driving start to the display control unit 108 (step S205).

  When instructed to start the rewriting process, the display control unit 108 reads the first image data that is the currently displayed image from the VRAM 104, and executes Step 1 (Step S206). In this example, the display control unit 108 reads the first image data and writes the inverted image on the display body 107.

  While the display control unit 108 is performing the rewriting process, the CPU 101 monitors the interruption. When the user presses the page turning button, the CPU 101 detects a signal output from the UI button group 106 as an interrupt instructing rewriting to the third image (step S207). When detecting the interrupt, the CPU 101 determines whether it is necessary to interrupt the driving of the display control unit 108 (step S208). Since the display control unit 108 is currently executing the rewriting process, the CPU 101 determines that the driving needs to be interrupted. Furthermore, the CPU 101 specifies the designated drive step. In this example, step 1 is the designated drive step.

  When the execution of step 1 is completed, the display control unit 108 outputs a signal indicating that the execution of step 1 is completed (step S209). When notified of the completion of step 1, that is, the designated drive step, the CPU 101 outputs a command to instruct the interruption of the writing process, that is, the drive to the display control unit 108 (step S210). The display control unit 108 interrupts the writing process according to this command.

  When the writing process is interrupted, the CPU 101 generates data (hereinafter referred to as “third image data”) indicating a third image which is an image to be displayed next (step S211). When the third image data is generated, the CPU 101 writes the third image data in the VRAM 104 as an image to be displayed next (step S212). When the third image data is written, the CPU 101 outputs a command for instructing resumption of rewriting, that is, resumption of driving to the display control unit 108 (step S213).

  When the drive resumption is instructed, the display control unit 108 resumes the operation, and starts the writing process from Step 2 that is the next step after the operation is interrupted (Step S214). When the execution of step 2 is completed, the display control unit 108 notifies the completion of step 2 (step S215). The display control unit 108 executes step 3 following step 2 (step S216). That is, the display control unit 108 reads out the third image data that is the next image to be displayed from the VRAM 104 and writes the third image data in the display unit 107. When the execution of step 3 is completed, the display control unit 108 notifies the completion of step 3 (step S217). When the completion of step 3 is notified, the rewriting process is completed. Thereafter, the CPU 101 performs necessary processing such as writing the third image data into the VRAM 104 as the currently displayed image.

  As described above, according to the present embodiment, when an interrupt occurs during the rewriting process from the first image to the second image, the rewriting process to the second image is performed in the middle. It is interrupted and the process starts from the point where the rewriting process to the third image is interrupted. In this case, since the rewriting process is not performed from the beginning, the rewriting is performed at a higher speed as compared with the one not having the configuration of the present embodiment. In the above description, the process in the case where an interrupt occurs only once while the image rewriting process is performed has been described, but the process in the case where an interrupt occurs a plurality of times is the same as described above.

3. Other Embodiments The present invention is not limited to the above-described embodiments, and various modifications can be made. Hereinafter, some modifications will be described. In the description of the modification, common reference symbols are used for elements that are common to the embodiment. Two or more of the modifications described below may be used in combination.

3-1. Modification 1
In the above-described embodiment, the example in which the operation mode of the image rewriting control device 10 is determined by a user instruction has been described, but the factor for switching the operation mode is not limited to the user instruction. For example, the operation mode may be switched according to the timing at which an interrupt occurs, more specifically, the frequency or the time interval between two consecutive interrupts. In this case, the CPU 101 measures the number of interruptions per unit time. The CPU 101 switches the operation mode to the second operation mode when the number of interruptions per unit time exceeds the threshold value, and switches to the first operation mode when the number is less than the threshold value. According to this example, the rewriting process is accelerated when the page turning button is continuously pressed at a short interval, and the rewriting process is not accelerated when the page turning button is pressed at a relatively long interval. . The image rewrite control device 10 may have three or more operation modes. In short, it is only necessary that the operation mode of the image rewrite control device 10 includes at least the first operation mode and the second operation mode.

3-2. Modification 2
The operation mode may be switched depending on an image to be displayed or an image to be displayed next. In this case, the RAM 103 stores information for specifying the operation mode in a manner that can correspond to the image data. “Information specifying the operation mode” refers to a flag indicating the operation mode and a condition for selecting the operation mode. “Aspects that can be handled with image data” corresponds to the case where the image data itself includes information for specifying the operation mode, or the image data itself does not include information for specifying the operation mode. The case where it is attached. Information specifying the operation mode is stored in a storage unit such as the auxiliary storage device 115. The CPU 101 specifies an operation mode based on information for specifying an operation mode associated with image data to be displayed next. For example, by associating the first operation mode with an important page in a sentence, the page can be displayed without regard to the timing of pressing the page turning button.

3-3. Modification 3
In the above-described embodiment, the example in which the display unit 60 is an EPD that is a memory-type display has been described. However, any display can be used as long as it is driven by a plurality of driving steps including a step of refreshing the display. An apparatus may be used as the display means 60. Note that the memory-made display body refers to a display body that can maintain display for a predetermined time without supplying power.

3-4. Modification 4
In the above-described embodiment, the example in which the rewriting process is configured by the three driving steps of Step 1-3 has been described, but the rewriting process is not limited to this. Any process may be used as the rewriting process as long as it includes a step of refreshing the display and a step of displaying an image to be displayed next. In the step of refreshing the display, for example, the step of writing the data for making the entire screen black is repeated a predetermined number of times, the step of writing the data for making the entire screen white is repeated a predetermined number of times, and finally the next display is performed. A step of displaying a power image may be performed. Alternatively, in the step of refreshing the display, the step of writing data for making the entire screen black and the step of writing the data for making the entire screen white are alternately repeated a predetermined number of times, and finally the image to be displayed next is displayed. You may perform a step. Further alternatively, the step of refreshing the display may include only one of a step of writing data for making the entire screen black and a step of writing data for making the entire screen white. Instead of writing the data for making the entire screen black or writing the data for making the entire screen white, a step of writing an inverted image of the currently displayed image may be used. Further, instead of making the whole screen black or white, a step of making a part of the screen black or white may be used.

3-5. Modification 5
In the above-described embodiment, the example in which the drive step executed when the interrupt is detected is the “designated drive step” in the second operation mode, but the method for determining the designated drive step is limited to this. Is not to be done. Any driving step may be determined as the designated driving step as long as it is determined based on the driving step executed when the interrupt is detected and a predetermined rule. For example, as described in the modification example 4, the step of refreshing the display repeats the step of writing the data for making the entire screen white after repeating the step of writing the data for making the entire screen black five times and then the step of writing the data for making the whole screen white. In this case, the designated driving step may be a step of writing data for making the whole screen black for the fifth time or a step for writing data for making the whole screen white for the fifth time. In this case, if an interrupt is detected in the middle of executing the step of writing the data for making the entire screen black for the third time, the rewriting process is interrupted until the step of writing the data for making the entire screen black for the fifth time. It is executed without.

3-6. Modification 6
The specific operation sequence of the information display device 1 is not limited to that shown in FIG. For example, in the example of FIG. 7, the display control unit 108 reads the first image data from the VRAM 104 and writes an inverted image on the display body 107 based on the first image data. However, the VRAM 104 stores the inverted image data of the first image together with the first image data, and the display control unit 108 reads the inverted image data and writes the inverted image on the display unit 107. Also good. The display control unit 108 may be configured to continue the rewriting process until a command indicating interruption of the rewriting process is output from the CPU 101, or may continue the rewriting process to the CPU 101 after each driving step is completed. It may be configured to ask for permission.

3-7. Modification 7
The functional configurations of the information display device 1 and the image rewrite control device 10 are not limited to those shown in FIG. The image rewrite control device 10 may have the functions described as those that the image rewrite control device 10 does not have, such as the interrupt processing unit 30 and the image generation unit 40. Further, the image rewrite control device 10 may not have a part of the functions described as the functions of the image rewrite control device 10. For example, when the image rewrite control device 10 includes the image generation unit 40, the image rewrite control device 10 may not include the output unit 13. Alternatively, when the image rewrite control device 10 includes the interrupt processing unit 30, the image rewrite control device 10 may not include the input unit 14. The determination of the designated drive step may be performed by the image rewrite control device 10 itself, or may be performed by an element other than the image rewrite control device 10. When an element other than the image rewrite control device 10 determines the designated drive step, a signal indicating the designated drive step is input to the image rewrite control device 10 (depending on the content or timing). Further, the information display device 1 may not have the operation mode determination unit 70. That is, the operation mode of the image rewrite control device 10 may be single (only the second operation mode).

  Further, the correspondence between the functional configuration and the hardware configuration is not limited to that described in the above embodiment. For example, in the above-described embodiment, the CPU 101 has the functions as the interrupt processing unit 30, the image generation unit 40, and the operation mode determination unit 70. However, some or all of these functions are performed by hardware elements other than the CPU 101. It may be realized. For example, an interrupt monitoring circuit having a function as the interrupt processing unit 30 may be separately provided.

3-8. Other Modifications The hardware configuration of the information display device 1 is not limited to that shown in FIG. An apparatus having any hardware configuration may be used as long as the necessary functional configuration can be realized. In the above-described embodiment, the example in which the information display device 1 is electronic paper has been described. However, the information display device 1 may be a device other than electronic paper.

  In the above-described embodiment, the program executed by the CPU 101 includes a magnetic recording medium (magnetic tape, magnetic disk (HDD (Hard Disk Drive), FD (Flexible Disk), etc.)), and optical recording medium (optical disk (CD (Compact Disk)). , DVD (Digital Versatile Disk), etc.), magneto-optical recording medium, semiconductor memory (flash ROM, etc.) and the like. The program may be downloaded via a network such as the Internet.

It is a figure which shows the function structure of the information display apparatus 1 which concerns on one Embodiment. It is a figure which shows the hardware constitutions of the information display apparatus. 1 is a diagram illustrating an appearance of an information display device 1. FIG. 3 is a flowchart showing an operation of the information display device 1. It is a figure which illustrates the several drive step in a rewriting process. It is a figure which shows the process in step S150 typically. 4 is a diagram illustrating a specific operation sequence of the information display device 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Information display apparatus, 10 ... Image rewriting control apparatus, 11 ... Rewriting means, 12 ... Control means, 13 ... Output means, 14 ... Input means, 20 ... Operation means, 30 ... Interrupt processing means, 40 ... Image generation means, DESCRIPTION OF SYMBOLS 50 ... Memory | storage means, 60 ... Display means, 70 ... Operation mode determination means, 101 ... CPU, 102 ... ROM, 103 ... RAM, 104 ... VRAM, 105 ... I / O, 106 ... UI button group, 107 ... Display body, DESCRIPTION OF SYMBOLS 108 ... Display control part 111 ... Power supply ON / OFF circuit, 112 ... Power supply control part, 113 ... Battery, 114 ... Bus, 115 ... Auxiliary storage device, 117 ... Fingerprint sensor

Claims (8)

By executing are executed sequentially when rewriting an image displayed on the display means from the first image to the second image, a plurality of driving steps including the step of refreshing the display of the display means in order, There rows rewriting process of rewriting an image displayed on the display unit from the first image to the second image comprises a first step wherein the step of refreshing writing the fourth image on the display unit, the plurality of Rewriting means including a second step of writing the second image on the display means after the refreshing step ;
When an interrupt for instructing rewriting to the third image occurs during the rewriting process, the driving step is a driving step after the driving step being executed among the plurality of driving steps, and is determined according to the timing of the interrupt. The rewriting process is performed on the second image until the designated driving step, and the rewriting process is performed on the third image from a step other than the first step that is a driving step subsequent to the designated driving step. An image rewriting control device comprising: control means for controlling the means. The control means operates in one of a plurality of operation modes including a first operation mode and a second operation mode, each having a different designated drive step,
When the operation mode is the first operation mode, the designated drive step is a drive step after a step of performing a process of displaying the second image on the display means. The image rewriting control apparatus described in 1. The image rewrite control device according to claim 2, wherein the operation mode is switched according to a timing at which the interrupt is generated. The image rewrite control device according to claim 2, wherein the operation mode is switched according to the second image or the third image. An output means for outputting a signal indicating that each driving step is completed each time each of the plurality of driving steps is completed;
5. The image rewrite control device according to claim 1, further comprising: an input unit that receives a signal indicating that the rewrite process should be interrupted in the designated drive step. The image rewriting control apparatus according to claim 1, wherein the display unit includes an electrophoretic display element. An image rewriting control device according to any one of claims 1 to 6,
An information display device comprising the display means. In a computer apparatus having a rewriting means for rewriting an image displayed on the display means,
Order the rewrite means, it is executed sequentially when rewriting an image displayed on the display means from the first image to the second image, a plurality of driving steps including the step of refreshing the display of the display means the first step by performing, have rows rewriting process of rewriting an image displayed on the display unit from the first image to the second image, wherein the step of refreshing writing the fourth image on the display means And the plurality of steps includes a second step of writing the second image on the display means after the refreshing step;
When an interrupt for instructing rewriting to the third image occurs during the rewriting process, the driving step is a driving step after the driving step being executed among the plurality of driving steps, and is determined according to the timing of the interrupt. The rewriting process is performed on the second image until the designated driving step, and the rewriting process is performed on the third image from a step other than the first step that is a driving step subsequent to the designated driving step. And a control step for controlling the means.

Images