JP2008060815A - Portable electronic apparatus, image data output device, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively reduce power consumption. <P>SOLUTION: An image data output 200 for performing a display output operation to a display panel 300 includes a first and second operation systems. When a mode is shifted to a power saving mode in a portable electronic apparatus including the image data output 200. The operation of the whole image data output 200 is stopped, when the portable electronic apparatus becomes a prescribed state in the above situation, only the second operation system is operated, so as to develop image data with low resolution such as icon images in a display memory 230. In this case, a selector 260 selects background color information for designating background color. A synthesizer 270 generates the image data for the portion of one screen by synthesizing the background color information selected by the selector 260 with the icon image data from the second operation system. Consequently, the whole screen is shifted from a non-displaying state into a state where only the icon images and the background color are displayed, so that the power consumption is effectively reduced. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable electronic device, an image data output device, and a program, and more particularly to a portable electronic device, an image data output device, and a program that are suitable for reducing power consumption.

  A mobile communication terminal such as a portable small electronic device such as a mobile phone is generally provided with a display device such as a liquid crystal display device, and various images are displayed on the display device. . Recently, the demand for high-definition moving image display is high, and the performance of display devices in portable electronic devices is increasing. As a result, display with high luminance and high resolution is possible, but power consumption in the display device is increased, which poses a problem in portable electronic devices driven by a battery.

Therefore, a method for reducing power consumption in a display device has also been proposed. For example, in Patent Document 1, power consumption for display operation is reduced by changing the position, area, display content, and the like of a region to be displayed at time intervals.
JP 2000-112435 A

  On the other hand, display devices capable of displaying at a resolution of, for example, VGA (480 × 640) have been mounted due to higher definition accompanying higher performance of display devices. In a high-definition screen display such as VGA, the processing amount of the control unit increases, so that an increase in power consumption and a decrease in display speed may occur.

  Moreover, in order to make use of the display capability of the high-definition panel, it is necessary to perform screen display according to the resolution. However, it is difficult to increase the resolution of all screens, and conventional low resolution (for example, In many cases, a screen corresponding to QVGA (240 × 320) is used.

  Therefore, high resolution data such as VGA and low resolution data such as QVGA may be mixed in the screen image data displayed on the mobile communication terminal. In such a case, it is conceivable that image data having different resolutions (sizes) are processed and then combined and displayed. However, the conventional technique such as Patent Document 1 does not consider such combined display. Can not effectively reduce power consumption.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a portable electronic device, an image output device, and a program that can more effectively reduce power consumption for image display. To do.

In order to achieve the above object, a portable electronic device according to the first aspect of the present invention provides:
A first operation system that performs an output operation for first image data that conforms to a predetermined resolution, and a second operation that performs an output operation for second image data that conforms to a resolution lower than the predetermined resolution. In portable electronic equipment including an image data output device that combines and outputs image data from each operation system,
A control unit that selects an operation system to be operated according to a state of the portable electronic device and controls the image data output device so that the selected operation system operates;
It is characterized by that.

The portable electronic device is
It is desirable to further comprise storage means for storing condition information indicating at least one condition for determining the state of the portable electronic device.
It is desirable that the control means controls the image data output device so that only one of the operation systems operates when the state of the portable electronic device becomes the state indicated by the condition information.

The portable electronic device is
It is desirable to further include a sensor for detecting acceleration generated in the portable electronic device, in this case,
The control means preferably determines whether or not the portable electronic device is in a state indicated by the condition information based on a detection result of the sensor.

The portable electronic device is
It may further comprise a sensor for detecting the ambient brightness of the portable electronic device, in this case,
The control means preferably determines whether or not the portable electronic device is in a state indicated by the condition information based on a detection result of the sensor.

In the portable electronic device,
When the portable electronic device is in a state indicated by the condition information after controlling the image data output device so that only one of the operation systems operates, the other operation system also It is desirable to control to operate.

In the portable electronic device,
Each of the operation systems is composed of a writing means for developing image data in the image memory, a reading means for reading the image data developed in the image memory, and a processing means for processing the read image data. Can do.

In the portable electronic device,
The image data output device includes:
Selecting means for selecting one of the first image data output from the first operation system and background color information for designating a background color, and combining the selected one with the second image data; In this case,
The selection means includes
If the first operating system is not operating, select the background color information,
When the first operating system is operating, it is desirable to select the first image data.

  The portable electronic device is preferably a mobile communication terminal.

In order to achieve the above object, an image data output device according to a second aspect of the present invention provides:
A first operation system that performs an output operation on the first image data that conforms to a predetermined resolution;
A second operation system for performing an output operation on the second image data adapted to a resolution lower than the predetermined resolution;
Synthesizing means for synthesizing image data from each of the operating systems;
Output means for outputting the image data synthesized by the synthesis means,
Operating the first operating system and the second operating system independently according to predetermined conditions;
It is characterized by that.

In order to achieve the above object, a program according to the third aspect of the present invention is:
A first operation system that performs an output operation for first image data that conforms to a predetermined resolution, and a second operation that performs an output operation for second image data that conforms to a resolution lower than the predetermined resolution. A computer that controls a portable electronic device including an image data output device that synthesizes and outputs image data from each operation system,
Selecting an operation system to be operated according to the state of the portable electronic device, and realizing a function of controlling the image data output device so that the selected operation system operates;
It is characterized by that.

  According to the present invention, since an operation system for image data output is selected and operated, it is possible to effectively reduce power consumption.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the present embodiment, a case where the portable electronic device according to the present invention is configured by a mobile communication terminal will be described. The mobile communication terminal 1 according to the present embodiment is a mobile communication terminal device (telephone) such as a mobile phone or a PHS (Personal Handyphone System).

  The configuration of such a mobile communication terminal 1 will be described with reference to FIG. FIG. 1 is a block diagram illustrating a configuration example of a mobile communication terminal 1 according to an embodiment of the present invention. As shown in the figure, the mobile communication terminal 1 according to the present embodiment includes a communication control unit 10, an audio processing unit 20, an operation unit 30, a sensor unit 40, a storage unit 50, a host controller 100, an image data output unit 200, and the like. It is composed of

  The communication control unit 10 performs an operation related to a communication function that is a basic function of the mobile communication terminal 1. For example, communication using a communication method such as a CDMA (Code Division Multiple Access) method is used. A wireless communication is performed with a nearby base station by performing wireless transmission / reception by the antenna 11 that is configured by a device and is compatible with the communication method.

  The voice processing unit 20 includes, for example, a codec circuit that performs voice processing, and performs voice processing related to voice calls. That is, the received voice data is converted into an analog signal and output from the speaker 21, and the transmission voice input from the microphone 22 is converted into digital data for transmission.

  The operation unit 30 includes, for example, a cross cursor key, an alphanumeric key for inputting numbers and characters, a key for specifying a function, and the like, and is operated by a user of the mobile communication terminal 1. . The operation unit 30 generates an input signal corresponding to the operation of these keys and inputs the input signal to the host controller 100.

  The sensor unit 40 includes, for example, a sensor (acceleration sensor) that detects acceleration generated in the mobile communication terminal 1, a sensor (optical sensor) that detects the brightness around the mobile communication terminal 1, and the like. The state of the communication terminal 1 is detected. The sensor unit 40 inputs a signal indicating the detection result of the constituent sensor to the host controller 100.

  The storage unit 50 includes, for example, a ROM (Read Only Memory), a flash memory, and the like, and stores data necessary for processing performed by the host controller 100 and the like, processing results thereof, and the like. The storage unit 50 stores a program executed by the host controller 100. In this embodiment, as shown in FIG. 1, storage areas such as a high resolution image storage area 51, a low resolution image storage area 52, a background color information storage area 53, a setting information storage section 54, and a program storage area 55 are prepared. Is done.

  The high-resolution image storage area 51 is an area for storing image data (first image data) having a size suitable for display at a predetermined resolution (for example, VGA) among image data to be displayed on the display panel 300. . In the present embodiment, it is assumed that image data indicating a photographic image or a graphic image is included as an example of the first image data.

  The low-resolution image storage area 52 is image data (second image) having a size suitable for display at a resolution (for example, QVGA) lower than the resolution suitable for the first image data among the image data displayed on the display panel 300. Of the image data). In the present embodiment, it is assumed that image data indicating an icon image (including a clock display, a battery remaining amount display, a reception intensity display, and the like) is included as an example of the second image data.

  The background color information storage area 53 stores information (for example, RGB information) that specifies the background color of the display screen. In the present embodiment, for example, information for specifying a display color when displaying a single background image is stored in the background color information storage area 53.

  The setting information storage unit 54 stores setting information related to the display operation of the mobile communication terminal 1.

  The program storage area 55 stores an operation program executed by the host controller 100.

  The host controller 100 is composed of, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), and the like, and controls the operation of each unit of the mobile communication terminal 1. In the present embodiment, the host controller 100 executes the operation program stored in the program storage area 55, thereby realizing each process described below. The RAM configured in the host controller 100 is used as a work memory when the CPU executes a program.

  In the present embodiment, the host controller 100 executes a program stored in the program storage area 55, thereby functioning as a configuration for performing control related to the display operation of the mobile communication terminal 1. More specifically, each component functions as shown in FIG. That is, the host controller 100 functions as a power saving mode processing unit 111, a state determination unit 112, an output operation determination unit 113, an output image selection unit 114, an output device control unit 115, and the like.

  The power saving mode processing unit 111 sets a power saving mode provided for reducing power consumption of the mobile communication terminal 1. This power saving mode is a mode in which, for example, the display operation is stopped when a predetermined period of time elapses when the mobile communication terminal 1 is not operated. Therefore, the power saving mode processing unit 111 sets the power saving mode based on the user operation in cooperation with the operation unit 30. In this case, the power saving mode processing unit 111 stores information indicating the setting content (hereinafter referred to as “mode setting information”) in the setting information storage unit 54 of the storage unit 50. When the power saving mode is set to be valid, the power saving mode processing unit 111 controls the image data output unit 200 to stop the display operation and shift to the power saving mode.

  The state determination unit 112 determines the state of the mobile communication terminal 1 in cooperation with the sensor unit 40. When the sensor unit 40 is composed of an acceleration sensor, it is determined whether or not a certain level of acceleration has occurred in the mobile communication terminal 1 based on the detection result input from the sensor unit 40. Further, when the sensor unit 40 is composed of an optical sensor, it is determined based on the detection result input from the sensor unit 40 whether or not the surroundings of the mobile communication terminal 1 have become a certain level of brightness or more.

  Further, the state determination unit 112 determines whether or not the mobile communication terminal 1 is operated by the user based on the input from the power saving mode processing unit 111. In this case, an input signal from the operation unit 30 is input to the state determination unit 112 via the power saving mode processing unit 111 to determine whether or not the operation unit 30 has been operated.

  The output operation determination unit 113 determines the display output operation to be performed at that time based on the setting of the power saving mode by the power saving mode processing unit 111 and the determination result of the state determination unit 112. In this case, the output operation determination unit 113 determines the display output operation to be performed based on the setting information stored in the setting information storage unit 54.

  The output image selection unit 114 selects an image to be displayed based on the determination result of the output operation determination unit 113 and notifies the output device control unit 115 of it.

  Based on the determination result of the output image selection unit 114, the output device control unit 115 selects an operation system for performing the display operation of the image to be displayed, and controls the image data output unit 200 to operate in the selected operation system. To do. Here, when the image data output unit 200 performs a display operation, the image data notified from the output image selection unit 114 is acquired from the storage unit 50 and sent to the image data output unit 200 to display the image data. The image data output unit 200 is controlled so that the

  In the present embodiment, each configuration illustrated in FIG. 2 is logically realized by the host controller 100 executing a program. However, the present invention is not limited to this, and for example, an ASIC (Application Specific Integrated Circuit) is specified. Each configuration shown in FIG. 2 may be realized by hardware such as an integrated circuit for use).

  The image data output unit 200 is configured to display an image by processing an output signal from the host controller 100 and controlling the display panel 300. The image data output unit 200 according to the present embodiment has a configuration as shown in FIG.

  As illustrated, the image data output unit 200 includes a host interface (I / F) 210, a first write unit 221, a second write unit 222, a display memory 230, a first read unit 241, and a second read. A unit 242, a first processing unit 251, a second processing unit 252, a selection unit 260, a combining unit 270, a panel driving unit 280, and the like.

  The host interface 210 is an interface that electrically connects the image data output unit 200 and the host controller 100, and receives display target image data and control signals sent from the host controller 100.

  The first write unit 221 and the second write unit 222 control writing (development) of image data acquired from the host controller 100 to the display memory 230. Here, the first write unit 221 performs a write operation of first image data (high resolution data), and the second write unit 222 performs a write operation of second image data (low resolution data). .

  The display memory 230 is a memory (so-called VRAM (Video RAM)) for expanding image data to be displayed on the display panel 300.

  The first lead unit 241 and the second lead unit 242 control reading (output) of image data developed in the display memory 230. Here, the first read unit 241 performs a read operation of the first image data (high resolution data), and the second read unit 242 performs a read operation of the second image data (low resolution data). .

  The first processing unit 251 processes (enlarges, reduces, corrects, etc.) the first image data (high resolution data) read by the first lead unit 241 so as to match the display performance of the display panel 300. For example, when the display resolution of the display panel 300 is lower than the resolution to which the first image data is compatible (for example, when the display resolution of the display panel 300 is QVGA and the first image data is compatible with VGA). The first image data read by the first lead unit 241 is processed to be reduced in accordance with the panel size of the display panel 300. It is assumed that the operation by the first processing unit 251 includes equal magnification processing (× 1).

  The second processing unit 252 processes (enlarges, reduces, corrects, etc.) the second image data (low-resolution data) read by the second lead unit 242 so as to match the display performance of the display panel 300. For example, when the display resolution of the display panel 300 is higher than the resolution to which the second image data is compatible (for example, when the display resolution of the display panel 300 is VGA and the second image data is compatible with QVGA). Then, the second image data read by the second lead unit 242 is processed to be enlarged according to the panel size of the display panel 300.

  Up to this point, the configuration is for developing and processing the image data, but two operation systems are prepared according to the size of the target image data. That is, an operation system including a first write unit 221, a first read unit 241, and a first processing unit 251 that process first image data (high-resolution data) (hereinafter referred to as “first operation”). And an operation system (hereinafter, referred to as “system”), a second write unit 222, a second lead unit 242, and a second processing unit 252 that process the second image data (low-resolution data). (Referred to as “second operating system”).

  The selection unit 260 selects either the first image data processed by the first processing unit 251 or the specified background color information.

  The synthesizing unit 270 includes image data (first image data or background color information) processed by the operation of the first operation system and image data (second image data) processed by the operation of the second operation system. (Icon image)) is combined to generate display image data for one screen. For example, the image data enlarged by the second processing unit 252 is overwritten on the image data output from the first processing unit 251 for each pixel.

  The panel drive unit 280 performs processing for causing the display panel 300 to display the image data combined by the combining unit 270. The panel driving unit 280 includes, for example, a segment driver for driving the data electrodes of the liquid crystal panel (display panel 300), a common driver for driving the scanning electrodes, and the like. The input image data is driven by the liquid crystal panel. By converting the voltage into a voltage and supplying it to the display panel 300, an image is displayed on the display panel 300.

  The display panel 300 is a display panel that displays and outputs the image data combined by the combining unit 270 by driving the panel driving unit 280. In this embodiment, it is assumed that the liquid crystal display panel has a backlight. In this case, it is assumed that the drive control of the backlight is also performed by the panel drive unit 280.

  In the present embodiment, among the configuration of the image data output unit 200 described above, the first write unit 221, the second write unit 222, the first lead unit 241, the second lead unit 242, and the first processing unit. 251, the second processing unit 252, the selection unit 260, the synthesis unit 270, and the like are configured by hardware such as an arithmetic circuit. However, the present invention is not limited thereto, and for example, the host controller 100 executes a program. Thus, these functions may be realized by software processing.

  Each of the above-described configurations is a configuration necessary for realizing the present invention, and other configurations necessary for a basic function and an additional function as a mobile communication terminal are provided as necessary.

  The operation of the mobile communication terminal 1 having such a configuration will be described below. In this embodiment, it is assumed that the power saving mode is set to be valid. The “power saving mode transition process” executed by the host controller 100 when the power saving mode is enabled will be described with reference to the flowchart shown in FIG. This power saving mode transition process is started every time there is an input from the operation unit 30 to the host controller 100.

  When the processing is started, the power saving mode processing unit 111 starts timekeeping by using a timekeeping function by a timer circuit of the host controller 100, for example (step S101). That is, the elapsed time after operation using the operation unit 30 is started.

  When the mobile communication terminal 1 is operated before the transition time to the arbitrarily set power saving mode has elapsed (Step S102: Yes), the power saving mode processing unit 111 ends the process. In this case, the power saving mode processing unit 111 determines whether or not the mobile communication terminal 1 has been operated based on an input from the operation unit 30.

  On the other hand, when the mobile communication terminal 1 is not operated (step S102: No), the clocking operation is continued until the elapsed time being counted reaches the set transition time (step S103: No).

  When the transition time elapses without any operation after the previous operation (step S103: Yes), the power saving mode processing unit 111 controls the image data output unit 200 to shift to the power saving mode. In this embodiment, when shifting to the power saving mode, the backlight of the display panel 300 is turned off and the image data output operation of the image data output unit 200 is stopped, so that the mobile communication terminal 1 is not used. It is assumed that the power consumption is reduced.

  A display screen of the display panel 300 in this case is illustrated in FIG. FIG. 8A shows an example of a display screen in the normal display state. As illustrated, in the present embodiment, an icon display area and an image display area are provided as the configuration of the display screen. Here, in the icon display area, for example, a relatively small image such as an icon image indicating the radio wave intensity or the remaining battery level or a time display based on a clock function is displayed. On the other hand, for example, wallpaper images and images corresponding to various functions are displayed in the image display area. The state where the icon display area and the image display area are displayed as shown in FIG. 8A is hereinafter referred to as a “full-screen display state”.

  In this embodiment, an image to be displayed in the icon display area is prepared as low resolution data (second image data), and an image to be displayed in the image display area is prepared as high resolution data (first image data). Shall.

  FIG. 8B shows an example of a display screen when the normal display state is shifted to the power saving mode. As described above, when the mode is shifted to the power saving mode, the backlight is turned off and the display operation is stopped, so that nothing is displayed on the display panel 300 as illustrated. A state in which neither the icon display area nor the image display area is displayed as shown in FIG. 8B is hereinafter referred to as “entire display state”.

  When shifting to such a power saving mode, the power saving mode processing unit 111 controls the image data output unit 200 to acquire the first image data currently developed in the display memory 230 and to obtain a setting information storage unit. 54. That is, image data of an image (hereinafter referred to as “previous display image”) displayed in the image display area immediately before shifting to the power saving mode is stored in the storage unit 50 (step S104).

  Next, the power saving mode processing unit 111 sends a control signal for turning off the backlight of the display panel 300 to the image data output unit 200. In this case, a control signal is input to the panel drive unit 280 via the host interface 210 of the image data output unit 200. The panel drive unit 280 turns off the backlight of the display panel 300 according to the input control signal (step S105).

  The power saving mode processing unit 111 further sends a control signal for stopping the operation of the image data output unit 200 to the image data output unit 200. This control signal is input to each unit of the image data output unit 200 via the host interface 210, and the image data output operation in the image data output unit 200 is stopped (step S106).

  When the operation of the image data output unit 200 is stopped together with the transition to the power saving mode in this way, the power saving mode processing unit 111 notifies the state determination unit 112 to that effect. The state determination unit 112 operates the sensor unit 40 in response to the notification from the power saving mode processing unit 111 (step S107). That is, the sensor unit 40 is controlled to operate while the mobile communication terminal 1 is operating in the power saving mode. When the operation of the sensor unit 40 is started by the state determination unit 112, the process is terminated.

  In the present embodiment, the power saving mode is canceled when the mobile communication terminal 1 is in a state that satisfies a predetermined condition. A processing example when canceling the power saving mode will be described below. First, the “power saving mode canceling process (1)” for canceling the power saving mode based on a user operation will be described with reference to the flowchart shown in FIG. This power saving mode release process (1) is started when the operation unit 30 is operated when the entire screen is not displayed in the power saving mode.

  In this case, an input signal from the operation unit 30 is input to the host controller 100 and input to the state determination unit 112 via the power saving mode processing unit 111. Based on the input signal from the operation unit 30, the state determination unit 112 identifies which key of the keys constituting the operation unit 30 has been operated (step S201), and cancels the power saving mode. It is determined whether or not an assigned key (hereinafter referred to as “specific key”) has been operated (step S202).

  Here, in the present embodiment, it is assumed that conditions for canceling the power saving mode are defined in advance. Information indicating such release conditions (hereinafter referred to as “release condition information”) is stored in advance in the setting information storage unit 54 as setting information. An example of the release condition information is shown in FIG.

  As shown in the figure, the display condition according to the state of the mobile communication terminal 1 is set in the release condition information. The state determination unit 112 refers to such release condition information to determine whether or not the mobile communication terminal 1 is in a state that matches the condition for releasing the power saving mode.

  That is, in step S202, it is determined whether or not the key identified in step S201 is a specific key defined in the release condition information.

  If the operated key is not a specific key defined as a cancellation condition (step S202: No), it is not necessary to cancel the power saving mode, and the process is terminated as it is.

  On the other hand, when the operated key is a specific key (step S202: Yes), the state determination unit 112 notifies the output operation determination unit 113 to that effect. The output operation determination unit 113 determines the output operation when the specific key is operated in response to the notification from the state determination unit 112. Here, the output operation determination unit 113 refers to the release condition information in the setting information storage unit 54 to determine the output operation to be performed when the specific key is operated in the entire non-display state in the power saving mode ( Step S203).

  In the present embodiment, when a specific key is operated in a state where the entire screen is not displayed, the icon display area is displayed, and only the background color is displayed in the image display area. Therefore, in step S203, the output operation determination unit 113 determines that “icon display + background color display” is to be performed, and notifies the output image selection unit 114 to that effect.

  The output image selection unit 114 selects image data to be displayed in response to the notification from the output operation determination unit 113 (step S204). Here, since it is determined that “icon display + background color display” is performed in step S203, the output image selection unit 114 selects the image data of the icon image from the low resolution image storage area 52, and the background color information. Background color information (RGB information) for designating a predetermined background color is selected from the storage area 53. Here, when the icon image indicates the radio wave intensity and the remaining battery level, the output image selection unit 114 acquires information indicating the radio wave intensity and the remaining battery level from each unit of the mobile communication terminal 1, and obtains image data corresponding thereto. The low resolution image storage area 52 is selected.

  When the output image selection unit 114 selects the image data to be output in this manner, the output image selection unit 114 notifies the output device control unit 115 of the selection. At this time, the output image selection unit 114 notifies, for example, an address where the selected image data is stored.

  Based on the notification from the output image selection unit 114, the output device control unit 115 acquires the selected image data and background color information (hereinafter referred to as “display data”) from the storage unit 50 (step S205). Here, since “icon display + background color display” is performed, icon image data is acquired from the low-resolution image storage area 52 and background color information is acquired from the background color information storage area 53.

  The output device control unit 115 selects an operation system to be operated by the image data output unit 200 based on the image data acquired in this way (step S206). Here, since the high resolution data (first image data) is not displayed, the operation system to be operated is the second operation system.

  In this case, the output device control unit 115 sends the acquired display data to the image data output unit 200 together with a control signal for operating the second operation system.

  In the image data output unit 200, the operation of the second operation system is performed based on the control signal sent from the output device control unit 115. That is, the icon image data sent together with the control signal is processed by the second operation system, and the background color information is input to the selection unit 260 (steps S207 and S208).

  In step S207, the second writing unit 222 develops the icon image data in the display memory 230, and the second reading unit 242 reads it. Then, the second processing unit 252 performs scaling processing on the read icon image data as necessary, and sends the processed image data to the combining unit 270.

  The selection unit 260 selects the first image data (high resolution data to be displayed in the image display area) and background color information. However, since the high resolution data is not supplied, the first operation system operates. Not. Therefore, the selection unit 260 selects the background color information supplied from the output device control unit 115 and sends it to the synthesis unit 270.

  The combining unit 270 combines the icon image data processed in the second operation system and the background color information selected by the selection unit 260 to generate image data for one screen (step S209). That is, the composition unit 270 generates image data in which an icon image is displayed in the icon display area, and the designated background color is displayed in the image display area. The composition unit 270 sends the generated image data for one screen to the panel drive unit 280.

  The panel driving unit 280 drives the display panel 300 so that a screen based on the image data acquired from the combining unit 270 is displayed on the display panel 300. First, after turning off the backlight which has been turned off due to the entire non-display state (step S210), the display panel 300 is driven based on the image data generated by the combining unit 270 to display the icon image and the background color. Is performed (step S211).

  An example of the display screen at this time is shown in FIG. As shown in the figure, on the display screen of the display panel 300, an icon image is displayed in the icon display area, and the image display area is displayed in the designated background color. Such a display state is hereinafter referred to as a “partial display state”.

  While in such a partial display state, the first operation system does not operate, and an icon image is displayed by the operation of the second operation system. Further, since the first operating system is not operating, only the designated background color is displayed in the image display area. In the background color display by one color, for example, it is only necessary to specify the color to be displayed in all the pixels of the image display area, so that it is not necessary to develop image data in the display memory 230. Therefore, the power consumption of the image data output unit 200 in the partial display state is lower than that in the full screen display state.

  In the present embodiment, when the specific key is further operated in such a partial display state, a transition to the full screen display state is made. Here, since the power saving mode transition process (FIG. 4) described above is executed every time the operation unit 30 is operated, the timing operation is started when the specific key is operated. Therefore, if there is no operation for a certain period of time after the partial display state is entered, the mode shifts to the power saving mode. In this case (step S212: Yes), this process is terminated, and the power saving mode transition process is performed.

  On the other hand, when the specific key is operated before shifting to the power saving mode (step S212: No, step S213: Yes), the present embodiment shifts from the partial display state to the full screen display state. That is, when it is determined that the specific key for shifting from the partial display state to the full screen display state is operated based on the release condition information in the setting information storage unit 54, the output operation determination unit 113 displays “icon display”. It is determined that the operation of “+ image display” should be performed.

  In this case, the output image selection unit 114 accesses the setting information storage unit 54, and the image data of the previous display image stored in the setting information storage unit 54 in step S104 of the power saving mode transition process (FIG. 4) described above. Select (step S214), and notify the output device controller 115.

  In response to the notification from the output image selection unit 114, the output device control unit 115 acquires the image data of the previous display image from the setting information storage unit 54. Here, since the previous display image is an image displayed in the image display area immediately before shifting to the power saving mode, the image data is high resolution data (first image data). Therefore, the output device control unit 115 selects the first operation system as an operation system for performing such high-resolution data display operation, and generates a control signal for operating the first operation system. The output device control unit 115 sends the acquired image data of the previous display image to the image data output unit 200 together with the generated control signal.

  In the image data output unit 200, based on the control signal from the output device control unit 115, the previous display image (first image data) is output by the first operation system (step S215). That is, the first write unit 221 expands the previous display image data in the display memory 230 and reads it from the first read unit 241. Then, the first processing unit 251 performs a scaling process as necessary and supplies it to the selection unit 260.

  In the present embodiment, when both the background color information and the first image data are supplied, the selection unit 260 selects the first image data. Therefore, when the image data of the previous display image (first image data) is supplied by the operation of the first operation system, the selection unit 260 selects the image data of the previous display image (first image data). And then supplied to the synthesis unit 270.

  The synthesizing unit 270 includes the image data (first image data) of the previous display image supplied from the selection unit 260 and the icon image data (second image data) supplied by the operation of the second operation system. Are combined (step S216) and supplied to the panel drive unit 280.

  As a result, as shown in FIG. 8A, the icon image is displayed in the icon display area, and a transition is made to the full screen display state in which the previous display image is displayed in the image display area (step S217). That is, the process shifts from the full screen non-display state to the partial display state according to the operation of the specific key by the user, and shifts from the partial display state to the full screen display state according to the further operation of the specific key. finish.

  According to such a power saving mode release process (1), the power saving mode can be released stepwise by a user operation. Thus, for example, when you want to check the display of clock function, radio wave intensity, remaining battery level, etc. in the full screen non-display state in power saving mode, only the icon image showing these by operating the specific key once. Is displayed. At this time, in the image data output unit 200, since the first operation system is stopped and only the background color is displayed in the image display area, the power consumption for the display operation is reduced.

  Here, if the user desires the full screen display state, the specific key may be further operated. By performing such an operation, when a cancel operation from the power saving mode is performed, the display always shifts to a partial display state with low power consumption, and shifts to the full screen display state only when necessary. The power consumption can be reduced more effectively than the operation of shifting to the full screen display state by the release operation.

  In the present embodiment, automatic cancellation based on detection by the sensor unit 40 is performed in addition to cancellation of the power saving mode by a user operation. The automatic release operation will be described below. First, the “power saving mode release process (2)” executed when the sensor unit 40 is configured by an acceleration sensor will be described with reference to the flowchart shown in FIG. 6. This power saving mode release process (2) is assumed to be triggered by the transition to the power saving mode by the power saving mode transition process (FIG. 4) described above. In the present embodiment, it is assumed that the power saving mode is automatically canceled when the user picks up the mobile communication terminal 1.

  When the process is started, the state determination unit 112 starts monitoring the acceleration detection value sent from the acceleration sensor of the sensor unit 40 (step S301). That is, since the detection operation of the sensor unit 40 is started in step S107 of the power saving mode transition process (FIG. 4) described above, the detection value of the sensor unit 40 is changed to the state determination unit 112 along with the transition to the power saving mode. Is input. The state determination unit 112 starts monitoring the detection value input in this manner, and determines whether there is a change in the detection value.

  As described above, the acceleration sensor of the sensor unit 40 detects the acceleration generated in the mobile communication terminal 1. In this embodiment, the acceleration sensor determines whether or not the mobile communication terminal 1 has been moved by this acceleration. And Therefore, when the mobile communication terminal 1 is stationary, no acceleration is generated in the mobile communication terminal 1 and the detection value remains constant. On the other hand, for example, when the user picks up the mobile communication terminal 1 placed on a desk or the like, acceleration occurs in the mobile communication terminal 1 and the constant detection value changes. .

  When such a change in the detected value occurs, the state determination unit 112 refers to the release condition information stored in the setting information storage unit 54, and the detected acceleration is equal to or higher than the acceleration set as the condition value. It is determined whether or not (step S302). Here, it is assumed that the acceleration set as the condition value is an acceleration generated when the user picks up the stationary mobile communication terminal 1. Therefore, the state determination unit 112 determines whether or not the user has picked up the mobile communication terminal 1 based on the acceleration detection value acquired from the sensor unit 40.

  When the detected acceleration is not equal to or greater than the condition value (step S302: No), it is estimated that the user is not in the state of picking up the mobile communication terminal 1, and therefore it is not necessary to cancel the power saving mode. Therefore, in this case, monitoring of the detected value is continued.

  On the other hand, when acceleration equal to or greater than the condition value is detected (step S302: Yes), the same processing as in steps S203 to S211 of the power saving mode cancellation processing (1) (FIG. 5) described above is performed, so that the entire screen is not displayed. The display state is shifted to the partial display state (step S303). That is, when the user has picked up the mobile communication terminal 1, the icon image is displayed in the icon display area, and the partial display state in which only the background color is displayed in the image display area is obtained.

  In the present embodiment, when the specific key is operated in such a partial display state by automatic transition based on acceleration, the state is shifted to the full screen display state as in the case of the power saving mode release processing (1). And Therefore, if the specific key is operated before shifting to the power saving mode (step S304: No, step S305: Yes), the same as steps S214 to S217 of the power saving mode canceling process (1) (FIG. 5). By performing the process, the partial display state is shifted to the full screen display state (step S306), and the process is terminated.

  According to such a power saving mode release process (2), when the user picks up the mobile communication terminal 1, the state automatically shifts from the full screen non-display state to the partial display state. Such a state of the mobile communication terminal 1 may occur when the user uses the mobile communication terminal 1, but in addition to the case where the user uses each function of the mobile communication terminal 1, It may be picked up simply to check the clock display. Therefore, when it is detected that the user has picked up the mobile communication terminal 1, first, a transition is made to a partial display state in which only the icon image is displayed, and when the user desires a full screen display state, Shift according to the operation of a specific key.

  As a result, a transition is made to a partial display state that consumes less power than the full screen display state, which is more effective than a full screen display state when the user picks up the mobile communication terminal 1. Power consumption can be reduced. In addition, since the user automatically shifts to the partial display state simply by picking up the mobile communication terminal 1, it is not necessary to perform key operations when the user wants to see the icon display, which is highly convenient.

  Next, the “power saving mode canceling process (3)” for automatically canceling the power saving mode when the sensor unit 40 is composed of an optical sensor will be described with reference to the flowchart shown in FIG. This power saving mode release process (3) is assumed to be triggered by the transition to the power saving mode by the power saving mode transition process (FIG. 4) described above. In the present embodiment, by using the detection value of the optical sensor, the power saving mode is set in response to a change in brightness around the mobile communication terminal 1 (for example, when it is taken out from a dark part such as a bag). It is assumed that an automatic release operation is performed. Therefore, in the present embodiment, it is assumed that the power saving mode is set to be automatically canceled when the brightness around the mobile communication terminal 1 changes (dark → light).

  When the processing is started, the state determination unit 112 starts monitoring the detection value that is transmitted from the optical sensor of the sensor unit 40 and that indicates the brightness around the mobile communication terminal 1 (step S401). That is, since the detection operation of the sensor unit 40 is started in step S107 of the power saving mode transition process (FIG. 4) described above, the detection value of the sensor unit 40 is changed to the state determination unit 112 along with the transition to the power saving mode. Is input. The state determination unit 112 starts monitoring the detection value input in this way.

  When monitoring of the detected value is started, the state determination unit 112 first determines whether or not the mobile communication terminal 1 is in a dark part (step S402). That is, since the power saving mode is canceled when it is taken out from a dark part such as a bag, the mobile communication terminal 1 must be in the dark part in order to perform the releasing operation. Therefore, a value indicating the brightness (darkness) of a dark part such as the inside of the bag is used as a condition value, and the state determination unit 112 determines whether or not the brightness around the mobile communication terminal 1 is equal to or less than this condition value. To do. It is assumed that such a condition value indicating a dark part is set in advance and stored in the setting information storage unit 54 as setting information. Therefore, the state determination unit 112 determines whether or not the mobile communication terminal 1 is in the dark part by comparing the detection value of the optical sensor with the condition value of the setting information.

  When the mobile communication terminal 1 is not in the dark part (step S402: No), the automatic determination operation based on the ambient brightness cannot be performed, and thus the state determination unit 112 continues to monitor the detection value.

  On the other hand, when the mobile communication terminal 1 is in a dark part such as the inside of the bag (step S402: Yes), the state determining unit 112 is taken out from the dark part such as the inside of the bag based on the detection value of the optical sensor being monitored. It is determined whether or not (step S403). In this case, for example, the state determination unit 112 determines whether or not the image has been taken out from the dark part by determining whether or not the brightness set as the dark part condition value is a predetermined value.

  If it is not taken out from the dark part (step S403: No), it is not necessary to cancel the power saving mode, so the state determination unit 112 continues to monitor the detection value.

  On the other hand, when it is determined that the mobile communication terminal 1 has been taken out from the dark part (step S403: Yes), the same processing as steps S203 to S211 of the above-described power saving mode release processing (1) (FIG. 5) is performed. By performing this, the full screen non-display state is shifted to the partial display state (step S404). That is, when the mobile communication terminal 1 is in a state of being taken out from the dark part, an icon image is displayed in the icon display area, and a partial display state in which only the background color is displayed in the image display area is obtained.

  In the present embodiment, when the specific key is operated in such a partial display state by automatic transition based on ambient brightness as in the case of the power saving mode release processing (1), the full screen display state is set. Shall be migrated. Therefore, if the specific key is operated before shifting to the power saving mode (step S405: No, step S406: Yes), the same as steps S214 to S217 in the power saving mode canceling process (1) (FIG. 5). By performing the process, the partial display state is shifted to the full screen display state (step S407), and the process is terminated.

  According to such a power saving mode release process (3), when the mobile communication terminal 1 is taken out from a dark part such as the inside of a bag, the state automatically shifts from the full screen non-display state to the partial display state. Such a state of the mobile communication terminal 1 may occur when the user uses the mobile communication terminal 1, but in addition to the case where the user uses each function of the mobile communication terminal 1, It may be picked up simply to check the clock display. Therefore, when it is detected that the mobile communication terminal 1 is taken out from the dark part, first, the state is shifted to the partial display state in which only the icon image is displayed, and when the user desires the full screen display state, Shift according to the operation of a specific key.

  As a result, a transition to a partial display state with lower power consumption than the full screen display state is surely made, so that it is more effective than the full screen display state when the mobile communication terminal 1 is taken out of the dark part. The power consumption can be reduced. Further, since the mobile communication terminal 1 automatically shifts to the partial display state only by being taken out from the dark part, it is not necessary to perform a key operation when it is desired to view the icon display.

  As described above, by applying the present invention as in the above-described embodiment, when image data of different sizes are combined and displayed according to a suitable resolution, the image data is expanded / read out or processed (enlarged). , Reduction, correction, etc.) according to the image size, a plurality of operation systems are prepared, and only one of the operation systems is operated according to the state of the mobile communication terminal 1, so that the power consumption for the display operation can be reduced. It can be effectively reduced.

  Here, for example, when the high resolution data (first image data) conforms to the VGA resolution and the low resolution data (second image data) conforms to the QVGA resolution, the second operation system is operated. In the partial display state, the data amount developed in the display memory 230 is reduced to about 1/20 compared to the full screen display state, so that the drawing speed is improved in addition to the reduction in power consumption.

  In this case, since the display of the image display area is only a single background color display, it is not necessary to develop the image data in the display memory 230 or to process the image data, so that the power consumption is reduced and the drawing speed is improved. Can be achieved.

  In addition, since the full screen non-display state is automatically restored based on the detection values of the acceleration sensor and the optical sensor, there is no need for user operation and the convenience is high. That is, the user can remove the full-screen non-display state automatically by simply picking it up to use the mobile communication terminal 1 or removing it from a dark part such as a bag, so that the user does not perform any operation. The icon display can be confirmed.

  When returning from the full-screen non-display state, the display is always returned to the partial display state and returned to the full-screen display state based on further user operation, so that more effective power consumption can be reduced.

  The said embodiment is an example and the application range of this invention is not restricted to this. That is, various applications are possible, and all embodiments are included in the scope of the present invention.

  For example, in the above embodiment, it is determined whether or not the user has picked up the mobile communication terminal 1 based on the acceleration detected by the acceleration sensor. However, if such a state can be determined. The detection value to be used is not limited to acceleration and is arbitrary.

  Similarly, as long as it can be determined whether or not the image is taken out from the dark part inside the bag, the method is not limited to the method using the detection value of the optical sensor, and any method can be adopted.

  Further, the condition for shifting from the full screen non-display state to the partial display state is not limited to the example shown in the above embodiment, and is arbitrary. For example, when the mobile communication terminal 1 is configured by a foldable casing, the display state may be shifted when the folded casing is expanded. In this case, the display unit can be shifted based on the detection result of the sensor unit 40 by configuring the sensor unit 40 with a sensor that detects the folded state of the housing.

  In the above embodiment, the case where the present invention is applied to a mobile communication terminal has been exemplified. However, the present invention is not limited to the mobile communication terminal, and various portable electronic devices (for example, PDA (Personal Digital Assistants)) The present invention can be applied to digital cameras, personal computers, and the like.

  Further, like the mobile communication terminal 1 shown in the above embodiment, the functions of the host controller 100 and the image data output unit 200 described above can be provided as well as being provided as a device provided with the functions according to the present invention in advance. By applying the program for realizing, it is possible to make an existing device function as the device according to the present invention.

  In this case, the method of applying the program is arbitrary. For example, the program can be stored and distributed on a storage medium such as a DVD (Digital Versatile Disk) or a memory card, and can be distributed via a communication medium such as the Internet. The program may be distributed and applied so as to be executable by a computer (such as a CPU) controlled by the apparatus.

It is a block diagram which shows the structure of the mobile communication terminal concerning embodiment of this invention. It is a functional block diagram which shows the function implement | achieved by the host controller shown in FIG. It is a block diagram which shows the structure of the image data output part shown in FIG. It is a flowchart for demonstrating "power saving mode transfer process" concerning embodiment of this invention. It is a flowchart for demonstrating "power saving mode cancellation | release process (1)" concerning embodiment of this invention. It is a flowchart for demonstrating "power saving mode cancellation | release process (2)" concerning embodiment of this invention. It is a flowchart for demonstrating "power saving mode cancellation | release process (3)" concerning embodiment of this invention. It is a figure for demonstrating the display state concerning embodiment of this invention, (a) shows the screen display example of a full screen display state, (b) shows the screen display example of a full screen non-display state, ( c) shows a screen display example in a partial display state. It is a figure which shows the example of the cancellation | release condition information stored in the setting information storage part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mobile communication terminal, 10 ... Communication control part, 11 ... Antenna, 20 ... Audio | voice processing part, 21 ... Speaker, 22 ... Microphone, 30 ... Operation part, 40 ... Sensor part, 50 ... Memory | storage part, 51 ... High resolution Image storage area 52 ... Low resolution image storage area 53 ... Background color information storage area 54 ... Setting information storage section 55 ... Program storage area 100 ... Host controller 111 ... Power saving mode processing section 112 ... State determination , 113... Output operation determination unit, 114... Output image selection unit, 115... Output device control unit, 200... Image data output unit, 210 ... host interface, 221 ... first write unit, 222. , 230 ... Display memory, 241 ... First lead part, 242 ... Second lead part, 251 ... First processing part, 252 ... Second processing part, 260 ... Selection part, 2 0 ... synthesis unit, 280 ... panel driving unit, 300 ... display panel

Claims (10)

A first operation system that performs an output operation for first image data that conforms to a predetermined resolution, and a second operation that performs an output operation for second image data that conforms to a resolution lower than the predetermined resolution. In portable electronic equipment including an image data output device that combines and outputs image data from each operation system,
A control unit that selects an operation system to be operated according to a state of the portable electronic device and controls the image data output device so that the selected operation system operates;
A portable electronic device characterized by that. Storage means for storing condition information indicating at least one condition for determining the state of the portable electronic device;
The control means controls the image data output device so that only one of the operation systems operates when the state of the portable electronic device becomes a state indicated by the condition information.
The portable electronic device according to claim 1. A sensor for detecting acceleration generated in the portable electronic device;
The control means determines whether the portable electronic device is in a state indicated by the condition information based on a detection result of the sensor.
The portable electronic device according to claim 2. A sensor for detecting brightness around the portable electronic device;
The control means determines whether the portable electronic device is in a state indicated by the condition information based on a detection result of the sensor.
The portable electronic device according to claim 2 or 3, When the portable electronic device is in a state indicated by the condition information after controlling the image data output device so that only one of the operation systems operates, the other operation system also Control to work,
The portable electronic device according to any one of claims 1 to 4, wherein the portable electronic device is any one of the above. Each of the operation systems includes a writing unit that develops image data in an image memory, a reading unit that reads out image data developed in the image memory, and a processing unit that processes the read image data.
The portable electronic device according to any one of claims 1 to 5, wherein the portable electronic device is a portable electronic device. The image data output device includes:
Selecting means for selecting one of the first image data output from the first operation system and background color information for designating a background color, and combining the selected one with the second image data; Prepared,
The selection means includes
If the first operating system is not operating, select the background color information,
If the first operating system is operating, select the first image data,
The portable electronic device according to claim 6. The portable electronic device is a mobile communication terminal.
The portable electronic device according to any one of claims 1 to 7, wherein the portable electronic device is a portable electronic device. A first operation system that performs an output operation on the first image data that conforms to a predetermined resolution;
A second operation system for performing an output operation on the second image data adapted to a resolution lower than the predetermined resolution;
Synthesizing means for synthesizing image data from each of the operating systems;
Output means for outputting the image data synthesized by the synthesis means,
Operating the first operating system and the second operating system independently according to predetermined conditions;
An image data output device characterized by that. A first operation system that performs an output operation for first image data that conforms to a predetermined resolution, and a second operation that performs an output operation for second image data that conforms to a resolution lower than the predetermined resolution. A computer that controls a portable electronic device including an image data output device that synthesizes and outputs image data from each operation system,
Selecting an operation system to be operated according to the state of the portable electronic device, and realizing a function of controlling the image data output device so that the selected operation system operates;
A program characterized by that.

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