JP2020101834A - Display device, method of controlling display of display device, and control program - Google Patents

Abstract

To provide a display device, a method for controlling the display device, a control program, and an electronic apparatus that can suppress electricity consumption to improve driving time for an electronic apparatus while satisfactorily providing various types of information to users.SOLUTION: In an electronic apparatus 10, two operating circuit parts 100 and 200 with different processing capacities are connected to a driver circuit 420 via individual interfaces I/F(A) and I/F(B). The driver circuit 420 is configured to sequentially overwrite image data separately written from the operating circuit parts 100 and 200. Further, a predetermined image is displayed in a display panel 410 on the basis of image data generated by the operating circuit part 100. Moreover, a specific image involving continuous update or change is displayed in a specific region 416 of the display region of the display panel 410 on the basis of image data generated by the operating circuit part 200, and the operating circuit part 100 is set to be in an electric power saving mode during the display of the specific image.SELECTED DRAWING: Figure 2

Description

The present invention relates to a display device that displays various kinds of information, and more particularly, to a display device provided in an electronic device worn or carried by a user, a display control method thereof, and a control program.

2. Description of the Related Art In recent years, various products have been developed and put on the market for wearing on a human body and recording and analyzing various data during exercise such as running, cycling, swimming, and trekking, and in daily life. In addition, mobile electronic devices such as mobile phones, smartphones (high-performance mobile phones), and tablet terminals have also become widespread. Most of such devices have a display device for providing various information to the user.

For example, Patent Document 1 and Patent Document 2 have a function of displaying various data, which are attached to the user's body and collected or analyzed during exercise, on a display device and provide the user with the data. So-called sports watches are disclosed.

JP, 2013-143996, A JP, 2013-140158, A

In the wearable and portable electronic devices of recent years including the above-mentioned sports watch and smartphone, sensors such as an acceleration sensor, a gyro sensor (angular velocity sensor), and a positioning sensor such as a GPS (Global Positioning System) are used. And various data communication functions. These sensors and communication functions are set to always operate when the electronic device is carried or used, and various information acquired by them is displayed to the user in various ways via the display device. Supplied in any form. As a result, the user can easily understand his/her exercise state, movement route, and the like.

However, in such an electronic device, when frequently displaying the latest information or the like on the display device or displaying a smooth moving image or animation, in an arithmetic processing circuit (processor) that drives and controls the display device. The processing load increases.

Therefore, in view of the above-mentioned problems, it is an object of the present invention to provide a display device, a display control method thereof, and a control program, which can provide various kinds of information to a user.

One aspect of the present invention is
Display part,
A first arithmetic processing unit that transmits data related to display contents displayed on the display unit by the display unit and a first interface;
A second arithmetic processing unit that transmits data related to display contents displayed on the display unit by the display unit and a second interface;
The first arithmetic processing unit, after the switching, when the display content displayed on the display unit is switched in an operating state in which the data related to the display content displayed on the display unit by the first interface is transmitted. It is determined whether or not to transmit the predetermined first notification signal to the second arithmetic processing unit based on the content of the image, and it is determined that the first notification signal is transmitted to the second arithmetic processing unit. In this case, the first notification signal is transmitted to the second arithmetic processing unit,
When the first arithmetic processing unit transmits the first notification signal, the second arithmetic processing unit receives the first notification signal, and a display displayed on the display unit by the second interface. It is a display device characterized by making a transition to an operation state in which data related to content is transmitted.

According to the present invention, various kinds of information can be satisfactorily provided to the user.

It is a schematic perspective view which shows the specific example of the electronic device provided with the display device which concerns on this invention. It is a schematic block diagram which shows 1st Embodiment of the electronic device provided with the display apparatus which concerns on this invention. FIG. 6 is a timing chart showing an example of a control method of the display device according to the first embodiment, and a diagram showing an example of screen display of the display panel at each timing. It is a figure which shows the other example of the screen display of the display panel in the display apparatus which concerns on 1st Embodiment. It is a schematic block diagram which shows the comparative example for demonstrating the effect of 1st Embodiment. It is a figure which shows the timing chart which shows the control method in a comparative example, and the example of a screen display. It is a schematic block diagram which shows 2nd Embodiment of the electronic device provided with the display apparatus which concerns on this invention. It is a figure which shows the example of a screen display in the display apparatus which concerns on 2nd Embodiment.

Hereinafter, a display device, a display control method thereof, and a control program according to the present invention will be described in detail with reference to an embodiment of an electronic device including the display device.
<First Embodiment>
(Display device, electronic equipment)
FIG. 1 is a schematic perspective view showing a specific example of an electronic device including a display device according to the present invention. In addition, FIG. 2 is a schematic block diagram showing a first embodiment of an electronic apparatus including the display device according to the present invention.

An electronic device 10 including a display device according to the present invention has a configuration including a display panel 40 for displaying at least various kinds of information, as shown in FIGS. 1A to 1C, for example. .. Here, as shown in FIG. 1A, the electronic device 10 has a wristwatch-type or wristband-type appearance and is a sports watch or a smartwatch worn on the body of a user (user). Good. The electronic device 10 may be, for example, a smartphone or a mobile phone as shown in FIG. 1B, or various mobile devices used outdoors such as a GPS logger as shown in FIG. 1C. May be In FIGS. 1A to 1C, 20 is an input operation unit such as a button switch, and 30 is an output unit such as a speaker or a buzzer.

The electronic device 10 according to the present embodiment is specifically, for example, as shown in FIG. 2, two sets of an arithmetic circuit unit (first arithmetic processing circuit) 100 and an arithmetic circuit unit (second arithmetic processing circuit). And 200. At least the input operation unit (detection unit) 120, the memory unit 140, the light source unit 300, and the display unit 400 are connected to the arithmetic circuit unit 100. Further, at least the sensor unit (detection unit) 210, the input operation unit (detection unit) 220, the output unit 230, the memory unit 240, and the display unit 400 are connected to the arithmetic circuit unit 200.

The arithmetic circuit unit 100 is an arithmetic device such as a CPU (central processing unit) or MPU (microprocessor), and executes a predetermined control program or algorithm program to respond to an operation signal in the input operation unit 120. The control and display of various information on the display unit 400 described later are controlled. Further, the arithmetic circuit unit 100 is connected to the display unit 400 via a serial interface such as MIPI (Mobile Industry Processor Interface) or an interface corresponding to a standard having a relatively high data transfer rate such as various parallel interfaces. By transmitting and receiving a predetermined signal including the image data generated in the arithmetic circuit unit 100 to the display unit 400, the predetermined image is displayed on the display unit 400. In addition, the arithmetic circuit unit 100 includes the cooperation communication unit 150, and transmits and receives a predetermined cooperation signal to and from the arithmetic circuit unit 200 described later to cooperate with and synchronize with the arithmetic circuit unit 200 and at least the display unit 400. Control the display state of. The cooperative communication unit 150 has a connection port of a synchronous serial communication standard such as UART (Universal Asynchronous Receiver Transmitter) and I ^<SUP>2</SUP> C (Inter-Integrated Circuit), and the cooperative communication unit 250 described later. By connecting to, a predetermined cooperation signal for controlling at least the display state of the display unit 400 is transmitted and received.

Here, the arithmetic circuit unit 100 applied to the present embodiment has at least a processing capacity capable of controlling high-performance display on the display unit 400. Here, in the present embodiment, the high-performance display means, for example, a high-definition color image, a smooth moving image or animation display, an image with a large amount of image data such as a visual effect such as a transition effect, or a screen. It refers to the display of an image with a large number of display updates (update frequency) and changes (movements). That is, as the arithmetic circuit unit 100, an arithmetic circuit having a relatively high processing capability is applied. Such an arithmetic circuit generally consumes a large amount of power because it executes various processing operations at a high operating frequency. In other words, this means that as the arithmetic circuit unit 100, it is necessary to apply an arithmetic circuit (high-power, high-performance processor) having relatively high processing capability and high power consumption. In the present embodiment, as the arithmetic circuit unit 100, in order to realize image writing at a relatively high frame rate of, for example, 30 fps or 60 fps, one having a relatively high operating frequency of, for example, several hundred MHz to 1 GHz is used. Apply. Here, the control program and the algorithm program executed in the arithmetic circuit unit 100 may be stored in the memory unit 140, or may be pre-installed in the arithmetic circuit unit 100. Good.

The input operation unit 120 is an input unit such as a touch panel arranged on the visual field side of a display panel (corresponding to the display panel 40 shown in FIGS. 1A to 1C) provided in the display unit 400 described later. , And outputs various operation signals resulting from the user's input operation to the arithmetic circuit unit 100. As a result, in the arithmetic circuit unit 100, items and information displayed on the display unit 400 are selected and set.

The memory unit 140 stores data used when executing a predetermined control program or algorithm program in the arithmetic circuit unit 100, data generated at that time, data to be displayed on the display unit 400, and the like. Further, the memory unit 140 may store a control program and an algorithm program executed in the arithmetic circuit unit 100. The memory unit 140 may have a part or all of the form as a removable storage medium such as a memory card, and may be configured to be attachable to and detachable from the electronic device 10.

The arithmetic circuit unit 200 is an arithmetic unit such as a CPU or MPU, similar to the arithmetic circuit unit 100 described above, and executes a predetermined control program or algorithm program to perform sensing operation or input operation in the sensor unit 210. The processing operation according to the operation signal in the unit 220, the provision of various information in the output unit 230, the display of various information in the display unit 400 described later, and the like are controlled. The arithmetic circuit unit 200 is connected to the display unit 400 via an interface corresponding to a standard having a relatively low data transmission rate such as SPI (Serial Peripheral Interface), and includes image data generated by the arithmetic circuit unit 200. A predetermined image is displayed on the display unit 400 by transmitting and receiving a predetermined signal to and from the display unit 400. Further, the arithmetic circuit unit 200 includes a cooperative communication unit 250 having a configuration equivalent to that of the cooperative communication unit 150 provided in the arithmetic circuit unit 100 described above, and transmits a predetermined cooperation signal with the arithmetic circuit unit 100 described above. By transmitting and receiving, at least the display state of the display unit 400 is controlled in cooperation with and in synchronization with the arithmetic circuit unit 100.

Here, the arithmetic circuit unit 200 applied to the present embodiment may have a processing capability that is capable of controlling the sensor unit 210 and the like that periodically perform a sensing operation. That is, as the arithmetic circuit unit 200, an arithmetic circuit having a relatively low processing capacity can be applied. Since such an arithmetic circuit generally needs to execute the processing operation at a low operating frequency, it is possible to suppress power consumption to a low level. In other words, as the arithmetic circuit unit 200, an arithmetic circuit (low power consumption) that is already provided in the electronic device 10 for use as a watch or the like that constantly operates and that has relatively low processing capability and low power consumption is used. , Low-performance processor) can be applied. In the present embodiment, as the arithmetic circuit unit 200, in order to realize a good sensing operation in the sensor unit 210, for example, one having a relatively low operating frequency of, for example, several MHz to several tens of MHz is applied. That is, as the arithmetic circuit unit 200, one having an operating frequency lower than that of the arithmetic circuit unit 100 is applied, which allows the arithmetic circuit unit 200 and the arithmetic circuit unit 100 to operate under the same condition. Low power consumption. Here, the control program and the algorithm program executed in the arithmetic circuit unit 200 may be stored in the memory unit 240 or may be pre-installed in the arithmetic circuit unit 200. Good.

The sensor unit 210 is, for example, a sensor unit such as an acceleration sensor, a gyro sensor, a geomagnetic sensor, an atmospheric pressure sensor, a temperature/humidity sensor, a pulse sensor, a heartbeat sensor, or a positioning unit including a GPS receiving unit, and is used during movement of a user Various types of physical, biological, and geographical data in daily life (hereinafter collectively referred to as “sensor data”) are acquired and output to the arithmetic circuit unit 200. Here, the sensors such as the acceleration sensor, the gyro sensor, and the geomagnetic sensor perform the sensing operation at a cycle of 100 times or more per second (sampling frequency of 100 Hz or more) during the exercise of the user to calculate the sensor data by the arithmetic circuit unit 200. Output to. Further, the positioning means by GPS outputs the positioning data to the arithmetic circuit section 200 by performing the sensing operation at a cycle of once in a few seconds, for example.

The input operation unit 220 is, for example, an input unit (corresponding to the input operation unit 20 shown in FIGS. 1A to 1C) such as a button switch, a slide switch, and a microphone provided in the housing of the electronic device 10. Yes, and outputs various operation signals resulting from the user's input operation to the arithmetic circuit unit 200. Thereby, in the arithmetic circuit unit 200, setting and control of the sensing operation in the sensor unit 210 described above, selection and setting of items and information displayed on the display unit 400, and the like are performed.

The output unit 230 is an acoustic means such as a buzzer or a speaker, or a vibrating means such as a vibration motor or a vibrator, and has a predetermined timbre or sound pattern, sound information such as a voice message, or a predetermined vibration pattern or its strength. By generating the vibration information of, various information is provided or notified to the user through hearing and touch. Here, the output unit 230 may generate predetermined sound information and vibration information in association with various information displayed on the display unit 400 described later.

The memory unit 240 stores the sensor data and the like acquired by the sensor unit 210 in a predetermined storage area. The memory unit 240 also stores data used when executing a predetermined control program or algorithm program in the arithmetic circuit unit 200, data generated at that time, and the like. Further, the memory unit 240 may store a control program and an algorithm program executed in the arithmetic circuit unit 200. The memory unit 240 may be configured integrally with the memory unit 140 connected to the arithmetic circuit unit 100 described above.

Although not shown, the light source unit 300 includes a backlight and a backlight drive circuit, and the backlight is turned on according to a display state on the display unit 400 and a user's input operation on the input operation units 120 and 220 described later. Control the light emission state. The backlight is arranged on the back side of the transmissive display panel (the side opposite to the user's view side), and includes, for example, a plurality of LEDs (light emitting elements) and various optical members such as a light guide plate and a light diffusion film. The surface light source used is applied. The backlight drive circuit controls the lighting (ON), extinguishing (OFF) state and light emission brightness of the backlight based on the control signal output from the arithmetic circuit unit 100. The backlight drive circuit controls the light emission state of the backlight based on the control signal from the arithmetic circuit unit 100 that operates in cooperation with the arithmetic circuit unit 100, in addition to the control signal from the arithmetic circuit unit 100. It may be one.

As shown in FIG. 2, the display unit 400 includes a transmissive display panel (first display panel) 410 and a driver circuit (indicated as “driver IC” in the figure) 420 having a frame memory built therein. ing. The display panel 410 may be, for example, a transmissive TFT (Thin Film Transistor) color liquid crystal panel, and displays various types of information generated by the arithmetic circuit unit 100 and the arithmetic circuit unit 200 in a predetermined form. Here, in the present embodiment, the display panel 410 is controlled by the driver circuit 420 so that high-performance display is realized. Further, the driver circuit 420 has a plurality of interfaces for receiving a predetermined signal including image data from each of the arithmetic circuit unit 100 and the arithmetic circuit unit 200 via individual signal lines. Specifically, the driver circuit 420 is connected to the arithmetic circuit unit 100 via, for example, a serial interface such as MIPI or a parallel interface (indicated as “I/F(A)” in the drawing), and for example, SPI or the like. Is connected to the arithmetic circuit section 200 via a serial interface (denoted as “I/F(B)” in the figure). In particular, in the present embodiment, the driver circuit 420 sequentially overwrites and saves the image data and the like transmitted via the above-described individual interfaces in the built-in frame memory. That is, when the image data from one of the arithmetic circuit unit 100 and the arithmetic circuit unit 200 is written in the frame memory and the image data is written from the other, the latter image data is overwritten so that it becomes valid. Saved. Here, by designating an address when writing the image data, only the image data of the corresponding address among the image data already written in the frame memory is overwritten. The timing at which image data is transmitted from each of the arithmetic circuit unit 100 and the arithmetic circuit unit 200 to the driver circuit 420 is such that a cooperation signal is transmitted and received between the arithmetic circuit unit 100 and the arithmetic circuit unit 200 to cooperate with each other. It is controlled by synchronizing.

Accordingly, in the present embodiment, based on the characteristics of the transmissive color display panel, a predetermined color image or moving image based on the image data generated by the arithmetic circuit unit 100 is displayed on the display panel 410, By turning on the backlight provided on the back side, a high-intensity color image or the like is projected and visually recognized by the user. Then, when the data capacity of the image displayed on the display panel 410 is small (small), or when the number of screen display updates (update frequency) or change (movement) is small, the arithmetic circuit unit 100 is changed according to the display state. And the arithmetic circuit unit 200 cooperates and synchronizes, and a specific image (specific image) based on the image data generated by the arithmetic circuit unit 200 is displayed in a specific display area (specific area) in which an address is designated. The method of displaying the image on the display unit 400 will be described later in detail.

Then, the respective configurations described above realize their respective functions by the drive power supplied from the power supply unit 500, as shown in FIG. Here, as the power supply unit 500, in the portable electronic device 10, for example, a commercially available primary battery such as a coin battery or a button battery, or a secondary battery such as a lithium ion battery or a nickel hydrogen battery is applied. In addition to the above-described primary battery and secondary battery, the power source unit 500 may be a power source using energy harvesting technology that generates power from energy such as vibration, light, heat, or electromagnetic waves, or may be used in combination. It may be applied.

Note that, in the present embodiment, as shown in FIG. 2, the arithmetic circuit unit 100 and the arithmetic circuit unit 200 are shown as separate configurations, but the present invention is not limited to this configuration. The arithmetic circuit unit 100 and the arithmetic circuit unit 200 may be integrated on a single semiconductor in the form of, for example, a system-on-a-chip (SOC). Good. Also in this case, interfaces I/F (A) and I/F (B) for connecting the arithmetic circuit units 100 and 200 and the display unit 400 to each other and transmitting and receiving a predetermined signal are individually provided.

Although not shown in the above-described embodiment (FIG. 2), the arithmetic circuit unit 100 and the arithmetic circuit unit 200 are provided outside the electronic device 10 (hereinafter, referred to as “external device”). And a communication interface unit (hereinafter, abbreviated as “communication I/F unit”) for transmitting and receiving various data and signals by a predetermined wired or wireless communication method. .. Here, a communication I/F unit is provided in the (high-power, high-performance) arithmetic circuit unit 100, and data or the like is exchanged with an external device (for example, a high-performance information processing device such as a smartphone or a personal computer) by wireless communication. When transmitting/receiving, a wireless communication method capable of transmitting/receiving a relatively large amount of data at high speed, such as Bluetooth (Bluetooth (registered trademark)) communication or Wi-Fi (wireless fidelity (registered trademark)) communication. Is applied. On the other hand, a communication I/F unit is provided in the (low-power, low-performance) arithmetic circuit unit 200, and data and the like are transmitted/received to/from an external device (for example, a sensor device attached to another part of the body) by wireless communication. In this case, a low power consumption wireless communication method such as Bluetooth (registered trademark) low energy (LE) communication is applied.

(Display device control method)
Next, a control method of the display device applied to the electronic device according to the present embodiment will be described. Here, when the user wears or carries the portable electronic device 10 as shown in FIG. 1 on his/her body and performs exercises such as running and walking and daily life, various information is displayed on the display panel 40. The control method when displaying and providing will be described. Here, the series of processing operations described below are realized by executing a predetermined algorithm program in the arithmetic circuit unit 100 and the arithmetic circuit unit 200.

FIG. 3 is a timing chart showing an example of a control method of the display device according to the present embodiment, and a diagram showing an example of screen display of the display panel at each timing. Here, description will be given with reference to the configuration of the electronic device described above (see FIG. 2) as appropriate. Further, FIG. 4 is a diagram showing another example of the screen display of the display panel in the display device according to the present embodiment.

In the display device control method according to the present embodiment, first, in the electronic device 10 worn (or carried) on the user's body, when the operating power is turned on, drive power is supplied from the power supply unit 500, and for example, As shown in (a) of the timing chart in the lower part of FIG. 3, the normal operation for performing the high function display is executed. In this normal operation, the image data for one screen of the display panel 410 generated by the arithmetic circuit unit 100 is sequentially transmitted through the interface I/F (A) and stored in the frame memory of the driver circuit 420. .. The image data stored in the frame memory is output to the display panel 410 by the driver circuit 420 at a predetermined frame rate, and a predetermined highly functional image is displayed in the entire display area of the display panel 410. Here, in the high function display, a high function image 412 is displayed, for example, as shown in (a) of the screen display in the upper part of FIG. Further, at this time, the arithmetic circuit unit 100 controls the backlight of the light source unit 300 provided on the back side of the display panel 410 to be in a lighting state. As a result, when the light of the backlight is emitted from the back surface side of the display panel 410, the high-performance image 412 displayed on the display panel 410 is projected and visually recognized on the user's visual field side.

Next, in the above-described high function display, as shown in (b) of the timing chart in the lower part of FIG. 3 and (b) of the screen display in the upper part of FIG. 3, for example, the application executed in the electronic device 10 or the input by the user When image switching occurs due to an operation (abbreviated as “user operation” in FIG. 3 ), the arithmetic circuit unit 100 displays a predetermined image according to the application or the input operation. Here, the input operation by the user is, for example, when the user intentionally operates the touch panel of the input operation unit 120, the button switch of the input operation unit 220, or the like, or in a stationary state (for example, a state of resting on a table). 2) corresponds to an operation of lifting the electronic device 10 or applying a specific vibration, shock, inclination or the like. The operation on the touch panel of the input operation unit 120 is directly detected by the arithmetic circuit unit 100. Further, the operation of the button switch or the like of the input operation unit 220 is detected by the arithmetic circuit unit 200, and the detection result is transmitted to the arithmetic circuit unit 100 by the cooperation signal. In addition, when the electronic device 10 is lifted or given a specific vibration, shock, inclination, or the like, the output from various sensors (for example, an acceleration sensor) of the sensor unit 210 is monitored by the arithmetic circuit unit 200, The monitoring result is transmitted to the arithmetic circuit unit 100 by the cooperation signal.

At this image switching timing, the arithmetic circuit unit 100 generates image data for one screen according to an application or an input operation and writes the image data in the frame memory of the driver circuit 420 via the interface I/F (A). .. As a result, as shown in (c) of the timing chart in the lower part of FIG. 3, a normal operation for displaying the entire image, in which a predetermined image corresponding to an application or an input operation is displayed in the entire display area of the display panel 410, is executed. To be done. Here, since the (high-power, high-performance) arithmetic circuit unit 100 performs control to generate image data and display a predetermined image on the display panel 410, the image displayed on the display panel 410 is the same as that described above. The high-performance image 412 can be instantly switched to a predetermined image according to an application or an input operation.

The image after being switched by the arithmetic circuit unit 100 is, for example, an image with a relatively small amount of image data, or an image with a small number of changes in the screen display and a change (hereinafter collectively referred to as a “simple image” for convenience). In this case, the arithmetic circuit unit 100 transmits a cooperation signal notifying the shift of the operating state to the arithmetic circuit unit 200 via the cooperation communication unit 150. As a result, the arithmetic circuit unit 100 shifts to a state in which most of the functions including the operation of generating image data and writing the image data in the driver circuit 420 are suspended. Here, in (c) of the screen display in the upper part of FIG. 3, as an example of the simple image 414, an image of “12:05:01” hour, minute, second used for so-called digital clock display is shown. Further, the transition to the power saving state of the arithmetic circuit unit 100 is realized by the arithmetic circuit unit 100 or the arithmetic circuit unit 200, for example, by cutting off or suppressing the supply of the driving power to the arithmetic circuit unit 100 in the power source unit 500. It Here, the power saving state refers to a state in which power is controlled to be supplied only to the minimum necessary constituent elements, and for example, ACPI (Advanced Configuration) which is a published standard for power control and constituent elements. of the sleeping modes S0 to S5 defined by "and Power Interface", which are states called standby and sleep of S1 and S3. The power saving state may be called a standby mode, a sleep mode, a sleep state, or the like. On the other hand, when the image after being switched by the arithmetic circuit unit 100 is a high-performance image, or when a relatively wide area in the display area of the display panel 410 is an image that is frequently updated or changed, The arithmetic circuit unit 100 does not transmit the cooperation signal to the arithmetic circuit unit 200, maintains the normal operation of performing the high function display, and does not shift to the power saving state.

Then, the arithmetic circuit unit 200 that has received the cooperation signal from the arithmetic circuit unit 100, the specific region in which the specific image that continuously updates or changes among the images displayed in the entire display region of the display panel 410 is displayed. Image data is generated and sequentially written into the frame memory of the driver circuit 420 via the interface I/F (B) by designating an address. Here, the specific area is set to a display area that is sufficiently narrow compared to the entire display area of the display panel 410, for example. As a result, as shown in (d) of the timing chart in the lower part of FIG. 3, the image data of the address specified in the frame memory is overwritten, and the image is rewritten only in a specific area of the display area of the display panel 410. The normal operation for displaying the area is continuously executed. In addition, since the image data written in the frame memory of the driver circuit 420 from the entire display in the arithmetic circuit unit 100 described above is retained as it is, except for the image data of the above-described specific area that has been overwritten, the image data of the display panel 410 is displayed. The state in which the previous image (when the entire image is displayed) is displayed is maintained in the entire area of the display area excluding the specific area. This area display is continued until the image displayed on the display panel 410 causes a relatively wide area update or change in the display area of the display panel 410. Specifically, in the area display, for example, as shown in (d) of the screen display in the upper part of FIG. 3, among the simple images 414 of hour, minute and second shown in (c) of the screen display in the upper part of FIG. In the hour/minute display area, since the image data written in the frame memory of the driver circuit 420 is held as it is, the image does not change. On the other hand, for the second display area (specific area) 416 of which the display changes every second in the simple image 414 of hour, minute, second, the arithmetic circuit unit 200 generates image data and the frame memory of the driver circuit 420. , The second display on the display panel 410 is rewritten every second in the order of “01”→“02”→...→“59”.

When the image displayed on the display panel 410 is updated or changed in a region wider than the specific region 416, for example, in (d) of the upper screen display of FIG. When the display changes, the arithmetic circuit unit 200 transmits a cooperation signal notifying the transition of the operating state to the arithmetic circuit unit 100 via the cooperation communication unit 250. As a result, the arithmetic circuit unit 200 temporarily suspends or interrupts the operation of generating the image data of the specific area 416 and writing the image data in the driver circuit 420. On the other hand, the arithmetic circuit unit 100 that has received the cooperation signal from the arithmetic circuit unit 200 returns from the power saving state and displays the entire display area having the hour, minute, second display, as shown in (e) of the timing chart in the lower part of FIG. The entire display is performed by generating the image data of and writing it in the driver circuit 420. Here, the return from the power saving state of the arithmetic circuit unit 100 to the normal operation is realized by the arithmetic circuit unit 100 or the arithmetic circuit unit 200, for example, by supplying or restoring drive power from the power source unit 500 to the arithmetic circuit unit 100. To be done. That is, when the second display of the simple image 414 having the hour, minute, second display reaches "59", the arithmetic circuit section 200 does not generate or write the image data of the next second display "00". On the other hand, as shown in (e) of the screen display in the upper part of FIG. 3, the arithmetic circuit unit 100 generates the image data including the hour and minute display in addition to the second display and writes the image data in the frame memory of the driver circuit 420. The image of “12:06:00” is displayed in the entire display area of the display panel 410. The hour, minute, second display on the display panel 410 is sequentially rewritten every minute such as “12:06:00”→“12:07:00”→... After that, the arithmetic circuit unit 100 transmits a cooperation signal to the arithmetic circuit unit 200 and shifts to the power saving state again. That is, the arithmetic circuit unit 100 is theoretically set to the power saving state for 59 seconds. When the arithmetic circuit unit 200 receives the cooperation signal from the arithmetic circuit unit 100, as shown in (f) of the timing chart of the lower stage of FIG. 3, as in the case of (d) of the timing chart of the lower stage of FIG. 3 described above, Of the display area of the display panel 410, the area display in which the image is rewritten only in the specific area 416 in which the second display is performed is performed.

Next, in the area display described above, as shown in (g) of the timing chart of the lower part of FIG. 3 and (g) of the screen display of the upper part of FIG. 3, for example, the application executed in the electronic device 10 or the input operation by the user When the image switching occurs due to, the arithmetic circuit unit 200 transmits a cooperation signal notifying the transition of the operating state to the arithmetic circuit unit 100 via the cooperation communication unit 250. As a result, the arithmetic circuit unit 200 stops or interrupts the operation of generating the image data of the specific area 416 and writing the image data in the driver circuit 420. On the other hand, the arithmetic circuit unit 100, which has received the cooperation signal from the arithmetic circuit unit 200, recovers from the power saving state as shown in (h) of the timing chart in the lower part of FIG. Is generated and written in the frame memory of the driver circuit 420. As a result, the entire display for displaying a predetermined image according to an application or an input operation is executed in the entire display area of the display panel 410. Even in this case, since the arithmetic circuit unit 100 (of high power and high performance) generates image data and controls the display of the image on the display panel 410, the image displayed on the display panel 410 may be displayed by an application or an application. It is possible to instantly switch to a predetermined image according to the input operation.

Here, as shown in (h) of the screen display in the upper part of FIG. 3, the image after being switched by the arithmetic circuit unit 100 is the high-performance image 412, or the display area of the display panel 410 is compared. When the relatively wide area is an image that is frequently updated or changed, the arithmetic circuit unit 100 continuously executes the normal operation for performing the high function display. On the other hand, when the image switched by the arithmetic circuit unit 100 is a simple image, the arithmetic circuit unit 100 transmits a cooperation signal to the arithmetic circuit unit 200 and the above-mentioned lower part of FIG. Similar to (d) and (f) of the timing chart, the arithmetic circuit unit 200 displays an area in which the image is rewritten only in the specific area 416 of the display area of the display panel 410.

In the present embodiment, the series of processing operations described above are repeatedly executed. Here, during execution of the series of processing operations described above, the arithmetic circuit units 100 and 200 constantly monitor an input operation for interrupting or ending the processing operation and a change in the operating state, and detect the input operation and the state change. In this case, the processing operation is forced to end. Specifically, the arithmetic circuit units 100 and 200 detect a user's operation power shutoff (OFF) operation, a low battery level in the power source unit 500, an abnormality of a function or application being executed, and the like. The processing operation of is forcibly interrupted and terminated.

Further, in the series of processing operations described above, the arithmetic circuit unit 200 generates at least image data when the arithmetic circuit unit 100 is performing high-performance display or when the power saving state returns to the normal operation. Then, the operation of writing to the driver circuit 420 is stopped or interrupted, and the normal operation of performing the sensing operation or the like in the sensor unit 210 with low power consumption is executed.

In the present embodiment, as an example of screen display, a simple image 414 including hour, minute, second display such as a so-called digital clock display is displayed on the display panel 410, and a specific area 416 for displaying the second is calculated. Although the case where the image data is generated by the circuit unit 200 and the second display of the display panel 410 is sequentially rewritten (FIG. 3) has been described, the present invention is not limited to this. Another example of the screen display according to the present invention is, for example, as shown in FIG. 4A, a simple image 414 including hour/minute/second hands (Hh, Hm, Hs) like an analog clock display on a display panel 410. Is displayed and the image data is generated by the arithmetic circuit unit 200 for the specific area 416 where the second hand Hs is displayed, and the second display on the display panel 410 is rewritten every one second. Regarding the display of the hour hand Hh and the minute hand Hm, the arithmetic circuit unit 100 may generate image data and rewrite the entire display area of the display panel 410 every minute. In this case, the specific area 416 is an area that moves or changes with respect to the display area of the display panel 410. That is, the specific area 416 does not have to be a fixed area in the display area of the display panel 410 as shown in the above-described embodiment, but may be an area whose position changes.

An example of a screen display including hour/minute/second display such as the digital clock display shown in the above-described embodiment (FIG. 3) or a screen display including an hour/minute/second hand such as analog clock display shown in FIG. 4(a) In the above, the case where only the second display or the display of the second hand is used as the specific area to rewrite the display by the arithmetic circuit unit 200 having low processing capability has been described, but the present invention is not limited to this. That is, by slightly shifting the display rewriting timing by the arithmetic circuit unit 200 having a low processing capacity, the arithmetic circuit unit 200 having a low processing capacity for the hour and minute display is provided between the rewriting operations of the second display every one second. The display may be rewritten by. According to this, the arithmetic circuit unit 100 having high processing capability can be set to the power saving state for a longer period of time (for example, the period in which the clock display is continued on the display panel 410).

Still another example of the screen display according to the present invention is, as shown in, for example, FIGS. 4B and 4C, first, image data generated by the arithmetic circuit unit 100 in the entire display area of the display panel 410. A high-performance image 412 such as a color image based on is displayed. Then, in a state where the number of updates or changes in the screen display of the high-performance image 412 is small, the area is sufficiently smaller than the display area of the display panel 410, the data capacity is small, and the updates or changes are continuously performed. With respect to the specific areas 416 and 418 in which specific images such as characters, figures, marks, etc. accompanied by (that is, having a high update frequency) are displayed, the arithmetic circuit unit 200 generates image data and sequentially rewrites the images. Good. Also in this case, based on the image data written in the frame memory of the driver circuit 420 by the arithmetic circuit unit 100, for example, a map image or a notification image is displayed in the entire display area of the display panel 410 except the specific areas 416 and 418. The state in which various high-performance images 412 are displayed is retained. In addition, based on the image data sequentially written by the arithmetic circuit unit 200, in the specific areas 416 and 418 of the display panel 410 on which the high-performance image 412 is displayed, for example, characters indicating a moving distance, a pace, and the like, weather information, etc. Various specific images, such as marks indicating information and operating states, which are continuously updated or changed, are rewritten.

Further, in the present embodiment, the specific area in which the image is sequentially rewritten by the arithmetic circuit unit 200 is sufficiently narrow as compared with the entire display area of the display panel 410, such as the second display area in the hour/minute/second display. Although the case of the display area has been described, the present invention is not limited to this. That is, in the specific area, the image data generated by the low-power, low-performance arithmetic circuit unit 200 is written in the driver circuit 420 via the interface I/F (B) having a low data transfer rate, and the image is displayed on the display panel 410. It is only necessary to have a display area large enough to be visually recognized by the user without causing the image to be disturbed or discontinued when is displayed. Therefore, when the data capacity of the image (specific image) displayed in the specific area is small, or when the number of updates and changes in the screen display is small, the specific area is set to be wider than the display area of the display panel 410. May be

(Verification of action and effect)
Next, the operation and effect of the electronic device including the display device according to the present embodiment and the control method thereof will be specifically described with reference to a comparative example.
FIG. 5 is a schematic block diagram showing a comparative example for explaining the action and effect of the present embodiment, and FIG. 6 is a timing chart showing the control method thereof and an example of screen display. Here, in order to clarify the comparison of the configuration and the control method between the present embodiment and the comparative example, the configuration and the control method equivalent to the present embodiment will be described with the same reference numerals.

For example, as shown in FIG. 5, the display device in the comparative example is roughly divided into an arithmetic circuit section 100P and a display section 400P, and the display section 400P has a transmissive display panel 410P and a frame memory built therein. And a driver circuit 420P. Although illustration is omitted, a backlight (light source unit) is arranged on the back side of the transmissive display panel 410P. In such a display device, as in the above-described embodiment, the display panel 410 is written by writing the image data generated by the arithmetic circuit unit 100P in accordance with an application or an input operation in the frame memory of the driver circuit 420. A predetermined image is displayed in the entire display area of. Then, by illuminating the back light of the display panel 410P from the back side, the image displayed on the display panel 410P is projected on the visual field side of the user and visually recognized.

Here, in order to display a high-definition color image as described above or a high-performance image such as a smooth moving image or animation on the display panel 410, the arithmetic circuit unit 100P has a relatively high processing capacity and , It is necessary to apply an arithmetic circuit with high power consumption (high-power, high-performance processor). In addition, it is necessary to connect the arithmetic circuit unit 100P and the driver circuit 420P by an interface I/F (P) corresponding to a standard having a relatively high data transfer rate such as MIPI or a parallel interface.

In such a display device, for example, as shown in FIG. 6C, even when a simple image 414 is displayed on the display panel 410P, an image that is continuously updated or changed (for example, in the figure). When the second display is included, it is necessary to continue the operation of generating image data of the entire display area of the display panel 410P by the arithmetic circuit unit 100P and writing the image data in the driver circuit 420P via the interface I/F (P). is there. Therefore, the arithmetic circuit unit 100P cannot be shifted to the power saving state. On the other hand, as shown in, for example, FIGS. 6A and 6E, when an image (for example, a map or an exercise support image) that has a small number of screen display updates and changes is displayed on the display panel 410P, the image is displayed. Is a high-performance image 412, the image data generated by the arithmetic circuit unit 100P and written in the driver circuit 420P is held in the frame memory. Therefore, while the image is being displayed, a request to generate the next image data is made. Until there is, the arithmetic circuit unit 100P can be shifted to the power saving state. Note that, in the example of the timing and screen display shown in FIG. 6, the hour, minute, and second display is performed by the user's input operation during the period in which the high-performance image 412 is displayed, as in the above-described embodiment of the present invention. A control method when the image is switched to a simple image 414 including the image will be described.

As described above, in the display device of the comparative example, since the display state of the display unit 400P is controlled by the arithmetic circuit unit 100P alone, the arithmetic circuit unit 100P is displayed when an image that is frequently updated or changed is displayed. Therefore, it is necessary to frequently generate image data and continue to write the image data in the driver circuit 420P. Therefore, the arithmetic circuit unit 100P cannot shift to the power saving state while displaying such an image, and the power consumption of the arithmetic circuit unit 100P cannot be sufficiently reduced. Further, even when the simple image 414 is displayed on the display panel 410P, it is necessary to use the (high-power, high-performance) arithmetic circuit unit 100P, so that the processing capacity of the arithmetic circuit unit 100P becomes excessive. However, the arithmetic circuit unit 100P cannot be effectively used.

On the other hand, in the above-described embodiment, the two arithmetic circuit units 100 and 200 having different processing capacities are provided, and each of them is displayed via the individual interface I/F (A) and I/F (B). It is connected to the driver circuit 420 of the section 400. Further, the driver circuit 420 has a built-in frame memory and is configured to sequentially overwrite image data individually written from the arithmetic circuit units 100 and 200. Then, when the high-performance image 412 is displayed on the display panel 410, image data is generated by the arithmetic circuit unit 100 having high processing capability and written in the driver circuit 420 via the interface I/F (A). On the other hand, when the simple image 414 is displayed on the display panel 410, the arithmetic circuit unit 100 and the arithmetic circuit unit 200 cooperate with each other to continuously update or change the display area of the display panel 410 ( Image data is generated by the arithmetic circuit unit 200 having a low processing capacity for the specific area 416 in which the specific image having a high update frequency or the specific image having a small data capacity is displayed, and the image data is generated via the interface I/F (B). The data is sequentially written in the driver circuit 420. Then, during this period, the arithmetic circuit unit 100 shifts to the power saving state and maintains the state.

As described above, in the present embodiment, a high-definition color image and a highly functional image such as a smooth moving image or an animation display are satisfactorily displayed by the arithmetic circuit unit 100 having a high processing capacity, and various information is displayed to the user. Can be provided satisfactorily. Further, a simple image such as an image having a small amount of image data or an image having a small number of screen display updates and changes can be favorably displayed by linking the arithmetic circuit unit 200 having low processing capability, The arithmetic circuit unit 100 having high processing capability can be shifted to the power saving state as much as possible. Therefore, according to the present embodiment, in a state where the processing load related to image display on the display unit 400 is relatively small, the arithmetic circuit unit 100 having a high processing capability is replaced with a low processing capability, but the operation is always continued. Since a part of the function is executed by the arithmetic circuit unit 200 and the period in which the arithmetic circuit unit 100 is set to the power saving state can be made as long as possible, the power consumption in the arithmetic circuit unit 100 can be reduced. The driving time of electronic devices can be improved.

<Second Embodiment>
Next, a second exemplary embodiment of an electronic device including the display device according to the present invention will be described in detail with reference to the drawings.
FIG. 7 is a schematic block diagram showing a second embodiment of an electronic device including the display device according to the present invention. Here, the same components as those in the first embodiment described above will be denoted by the same reference numerals and the description thereof will be simplified. FIG. 8 is a diagram showing an example of a screen display on the display device according to the present embodiment.

In the first embodiment, only one display panel 410 is provided in the display unit 400, and the display state of the display panel 410 is displayed by the arithmetic circuit unit 100 and the arithmetic circuit unit 200 connected to the driver circuit 420 having a plurality of interfaces. The configuration for controlling the has been described. In the second embodiment, a plurality of (here, two) display panels are provided in the display section 400, the arithmetic circuit section 100 controls the display state of the first display panel, and the arithmetic circuit section 200 controls the second display panel. It has a display pattern for controlling the display state of the display panel and a display pattern for controlling the display state of the first display panel by the arithmetic circuit section 100 and the arithmetic circuit section 200.

The electronic device 10 according to the second embodiment includes, for example, as shown in FIG. 7, two sets of the arithmetic circuit unit 100 and the arithmetic circuit unit 200 having different schematic and processing capabilities, and two sets of display panels (first display). A display unit 400 including a panel) 410 and a display panel (second display panel) 430. Here, in the present embodiment, the other configurations shown in FIG. 7 are the same as those in the above-described first embodiment, and thus the description thereof will be omitted.

The display unit 400 is provided with a driver circuit 420 having a frame memory for displaying an image on the display panel 410 and a driver circuit 440 having a frame memory for displaying an image on the display panel 430. Here, the display panel 410 and the driver circuit 420 have the same configurations and functions as those in the first embodiment, and the driver circuit 420 has interface I/Fs (A) and I/Fs having different data transfer rates, respectively. It is connected to the arithmetic circuit unit 100 and the arithmetic circuit unit 200 via (B). That is, the display panel 410 displays a predetermined image based on the image data generated by the arithmetic circuit unit 100 and the arithmetic circuit unit 200. Further, the driver circuit 440 is connected to the arithmetic circuit unit 200 via an interface I/F (C) corresponding to a standard having a relatively low data transfer rate such as SPI. That is, the display panel 430 displays a predetermined image based on the image data generated by the arithmetic circuit section 200. The image data generated by the arithmetic circuit unit 200 is controlled so as to be selectively written to either the driver circuit 420 or the driver circuit 440 according to the display pattern on the display unit 400.

In addition, in the present embodiment, a transmissive display panel is applied to at least one of the display panels 410 and 430, and the backlight of the light source unit 300 is arranged on the back side of the transmissive display panel. .. Here, the display panels 410 and 430 may have a configuration in which the display panels 410 and 430 are arranged side by side without overlapping in a plan view or independently of each other when viewed from the view side of the user. Further, when the display panels 410 and 430 are both transmissive display panels, for example, the display panels 410 and 430 are arranged so as to overlap each other in a plane and the backlight is arranged on the rearmost side. May be.

As the arithmetic circuit unit 100 that controls the display state of the display panel 410, an arithmetic circuit (high-power, high-performance processor) having a relatively high processing capability is applied as described in the first embodiment. Accordingly, as the display panel 410, a display panel that can realize high-performance display can be applied. Specifically, as the display panel 410, for example, a transmissive TFT color liquid crystal panel or the like can be applied as in the first embodiment described above.

On the other hand, the arithmetic circuit unit 200 that controls the display state of the display panel 410 or the display panel 430 is, as shown in the above-described first embodiment, an arithmetic circuit having a relatively low processing capability (a low-power, low-performance processor). ) Applies. Here, the arithmetic circuit section 200 selectively controls the display state of either the display panel 410 or the display panel 430 according to the display pattern on the display section 400. Accordingly, as the display panel 430, a display panel capable of display driving with relatively low power consumption or a screen display capable of displaying with low power consumption is applied. Specifically, as the display panel 430, for example, a PN (Polymer Network) type or PD (Polymer Dispersed) type liquid crystal panel having high reflection and excellent outdoor visibility, a display panel used for electronic paper, or the like is preferably applied. You can Alternatively, on the display panel 430, a clock display, a simple graphic display, a still image or an image with a small number of changes or changes in the screen display, which can be driven for display with low power consumption, is displayed. In the latter case, the display panel 430 is not limited to a PN-type or PD-type liquid crystal panel, electronic paper, or the like, and a TFT color liquid crystal panel or the like is applied similarly to the display panel 410. Good.

In the display device having such a configuration, the arithmetic circuit unit 100 performs high-performance display on the display panel 410, and the arithmetic circuit unit 200 performs simple display on the display panel 430. As shown in the first embodiment, when the arithmetic circuit unit 100 and the arithmetic circuit unit 200 display a simple image on the display panel 410, the second display pattern for displaying with low power consumption is selectively used. Controlled to be executed. Then, in the control of the display pattern in the display unit 400 as described above, the arithmetic circuit unit 100 and the arithmetic circuit unit 200 cooperate with each other by transmitting and receiving a cooperation signal via the cooperation communication units 150 and 250. The image data generated by the arithmetic circuit unit 100 and the arithmetic circuit unit 200 and the writing destination of the image data are determined according to the display states of the display panels 410 and 420. That is, in the first display pattern, the image data generated by the arithmetic circuit unit 100 is written to the driver circuit 420 via the interface I/F (A), and the image data generated by the arithmetic circuit unit 200 is the interface. It is written in the driver circuit 440 via the I/F (C). On the other hand, in the first display pattern, the image data generated by the arithmetic circuit unit 100 is written in the driver circuit 420 via the interface I/F (A), and the image data generated by the arithmetic circuit unit 200 is the interface. It is written in the driver circuit 420 via the I/F (B). Here, in the driver circuit 420, the image data transmitted from the arithmetic circuit unit 100 and the arithmetic circuit unit 200 is sequentially overwritten and saved in the frame memory.

Thereby, in the first display pattern, for example, the display states shown in FIGS. 8A to 8C are realized, and in the second display pattern, the display states shown in FIG. 8D, for example. The state is realized. Note that, in FIG. 8, the display panel 410 and the display panel 430 are both transmissive display panels, and the display panel 430 is disposed on the user's visual field side and the display panel 410 is disposed on the rear surface side and overlaps in a plane. A screen display in the case of such a configuration is conceptually shown.

In the display state shown in FIG. 8A, the arithmetic circuit unit 100 is controlled so that nothing is displayed on the display panel 410 (the lower stage of FIG. 8A), and the image data generated by the arithmetic circuit unit 200 is displayed. Based on this, a simple image 414 is displayed on the display panel 430 (middle part of FIG. 8A). In such a display state, as shown in the upper part of FIG. 8A, the user directly visually recognizes the simple image 414 displayed on the display panel 430 arranged on the visual field side. In this display state, the arithmetic circuit unit 200 can control the display state of the display panel 430 with low power consumption, and the arithmetic circuit unit 100 can be set to the power saving state. It is possible to significantly reduce the power consumption.

Further, in the display state shown in FIG. 8B, a high-performance image 412 such as a color image is displayed on the display panel 410 based on the image data generated by the arithmetic circuit unit 100 (FIG. 8B lower stage). ), the arithmetic circuit unit 200 is controlled so that nothing is displayed on the display panel 430 (actually, the total transmission state is set) (middle row of FIG. 8B). In such a display state, as shown in the upper part of FIG. 8B, the high-performance image 412 displayed on the display panel 410 arranged on the back side passes through the display panel 430 and is visually recognized by the user. .. Further, in this display state, the operation of generating image data by the arithmetic circuit unit 200 and writing the image data in the driver circuit 440 can be stopped or interrupted, so that the arithmetic circuit unit 200 can be operated with low power consumption. The power consumption of the display panel 430 and the driver circuit 440 can be suppressed, and the power consumption of the electronic device 10 can be suppressed.

Further, in the display state shown in FIG. 8C, a high-performance image 412 such as a color image is displayed on the display panel 410 based on the image data generated by the arithmetic circuit unit 100 (FIG. 8C lower stage). ), based on the image data generated by the arithmetic circuit unit 200, a simple image 414 is displayed on the display panel 430 (middle row of FIG. 8C). In such a display state, as shown in the upper part of FIG. 8C, when the high-performance image 412 displayed on the display panel 410 is transmitted through the display panel 430, the simple image displayed on the display panel 430 is displayed. Images of various display forms are visually recognized by the user by being combined (or superposed) with the image 414.

Further, in the display state shown in FIG. 8D, a high-performance image 412 such as a color image is displayed in the entire display area of the display panel 410 based on the image data generated by the arithmetic circuit unit 100, and calculation is performed. Based on the image data generated by the circuit unit 200, specific images such as characters, figures, and marks that are continuously updated or changed are displayed in the specific regions 416 and 418 of the display regions of the display panel 410. (FIG. 8(d) lower stage). That is, as in the first embodiment described above, the display panel 410 displays a predetermined image including the specific image. Further, the arithmetic circuit unit 200 controls so that nothing is displayed on the display panel 430 (actually, the total transmission state is set) (middle row of FIG. 8D). In such a display state, as shown in the upper part of FIG. 8D, the high-performance image 412 including the specific image displayed on the display panel 410 arranged on the back side is transmitted through the display panel 430 and displayed to the user. To be seen. Further, in this display state, only one display panel 410 can display an image of various display forms equivalent to the composite image shown in FIG. Since the arithmetic circuit unit 100 can be set to the power saving state while the image is displayed, the power consumption of the electronic device 10 can be significantly suppressed.

As described above, in the present embodiment, by providing the two display panels 410 and 430, it is possible to display images in a wider variety of display forms and satisfactorily provide various kinds of information to the user. Further, similarly to the above-described first embodiment, when the processing load related to image display on the display section 400 is relatively small, the arithmetic circuit section 100 having high processing capacity is replaced with a low processing capacity but constant operation. A part of the function can be executed by the continuing arithmetic circuit unit 200 to shift the arithmetic circuit unit 100 to the power saving state. As a result, the period of the power saving state in the arithmetic circuit unit 100 can be made as long as possible, so that the power consumption in the arithmetic circuit unit 100 can be reduced and the driving time of the electronic device can be improved.

Although some embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, but includes the invention described in the claims and the scope equivalent thereto.
The inventions described in the initial claims of the present application will be additionally described below.

(Appendix)
[1]
A first arithmetic processing circuit;
A second arithmetic processing circuit;
A driver including a frame memory, in which the first image data generated by the first arithmetic processing circuit and the second image data generated by the second arithmetic processing circuit are overwritten and stored in the frame memory. Circuit,
A first display panel on which a predetermined image is displayed based on the first image data and the second image data stored in the frame memory,
The first arithmetic processing circuit and the second arithmetic processing circuit cooperate with each other to sequentially overwrite and save the first image data and the second image data in the frame memory, A display device, wherein when the image based on the second image data is displayed on the display panel, the first arithmetic processing circuit is set to a power saving state.

[2]
The driver circuit displays a second image based on the second image data in an area narrower than the display area of the first display panel that displays the first image based on the first image data. The display device according to [1].

[3]
The display device according to [2], wherein the second image is an image having a higher update frequency or a smaller amount of image data than the first image.

[4]
A second display panel whose display state is controlled by the second arithmetic processing circuit;
The display according to any one of [1] to [3], wherein the second arithmetic processing circuit selectively controls display states of the first display panel and the second display panel. apparatus.

[5]
The display device according to any one of [1] to [4], wherein the second arithmetic processing circuit has an operating frequency lower than that of the first arithmetic processing circuit.

[6]
The display device according to any one of [1] to [4], wherein the second arithmetic processing circuit has lower power consumption when operated under the same condition than the first arithmetic processing circuit. ..

[7]
A first arithmetic processing circuit;
A second arithmetic processing circuit;
A driver including a frame memory, in which the first image data generated by the first arithmetic processing circuit and the second image data generated by the second arithmetic processing circuit are overwritten and stored in the frame memory. Circuit,
A first display panel for displaying a predetermined image based on the first image data and the second image data stored in the frame memory;
A detection unit that detects a signal related to a user's input operation,
The first arithmetic processing circuit and the second arithmetic processing circuit cooperate with each other according to the display state of the image on the first display panel, or the presence or absence of an input operation by the user, When the first image data and the second image data are sequentially overwritten and stored in the frame memory and the image based on the second image data is displayed on the first display panel, An electronic device, wherein the first arithmetic processing circuit is set to a power saving state.

[8]
A second display panel whose display state is controlled by the second arithmetic processing circuit;
The electronic device according to [7], wherein the second arithmetic processing circuit selectively controls display states of the first display panel and the second display panel.

[9]
The electronic device according to [7] or [8], wherein the second arithmetic processing circuit has an operating frequency lower than that of the first arithmetic processing circuit.

[10]
The electronic device according to [7] or [8], wherein the second arithmetic processing circuit has lower power consumption when operated under the same conditions than the first arithmetic processing circuit.

[11]
A first arithmetic processing circuit, a second arithmetic processing circuit, and a frame memory are provided, and image data generated by the first arithmetic processing circuit or the second arithmetic processing circuit is overwritten and saved in the frame memory. And a first display panel on which a predetermined image is displayed based on the image data stored in the frame memory,
The first arithmetic processing circuit and the second arithmetic processing circuit are made to cooperate with each other to sequentially overwrite and save the first image data and the second image data in the frame memory,
A region narrower than a region in which the first image based on the first image data of the first display panel is displayed, based on the second image data generated by the second arithmetic processing circuit. Display the second image on
A method of controlling a display device, comprising: setting the first arithmetic processing circuit to a power saving state when the second image is displayed on the first display panel.

[12]
A second display panel whose display state is controlled by the second arithmetic processing circuit;
The display device control method according to [11], wherein the display states of the first display panel and the second display panel are selectively controlled by the second arithmetic processing circuit.

[13]
A first arithmetic processing circuit, a second arithmetic processing circuit, and a frame memory are provided, and image data generated by the first arithmetic processing circuit or the second arithmetic processing circuit is overwritten and saved in the frame memory. And a first display panel on which a predetermined image is displayed based on the image data stored in the frame memory,
A computer having the first arithmetic processing circuit and the second arithmetic processing circuit,
The first arithmetic processing circuit and the second arithmetic processing circuit are made to cooperate with each other to sequentially overwrite and save the first image data and the second image data in the frame memory,
A region narrower than a region in which the first image based on the first image data of the first display panel is displayed, based on the second image data generated by the second arithmetic processing circuit. Display the second image on
A control program for a display device, which sets the first arithmetic processing circuit to a power saving state when the second image is displayed on the first display panel.

[14]
A second display panel whose display state is controlled by the second arithmetic processing circuit;
The control program for a display device according to [13], characterized in that the display states of the first display panel and the second display panel are selectively controlled by the second arithmetic processing circuit.

10 electronic device 40 display panel 100, 200 arithmetic circuit unit 120, 220 input operation unit 140, 240 memory unit 150, 250 cooperative communication unit 210 sensor unit 300 light source unit 400 display unit 410, 430 display panel 412 high-performance image 414 simple Image 416, 418 Specific area 420, 440 Driver circuit 500 Power supply unit I/F(A) to I/F(C) interface

One aspect of the present invention is
Display part,
A first arithmetic processing unit for transmitting to the display unit data relating to display contents displayed on the display unit;
A second arithmetic processing unit having a processing capacity lower than that of the first arithmetic processing unit and transmitting data relating to display contents displayed on the display unit to the display unit;
A second communication interface unit provided in the second arithmetic processing unit for receiving data from an external device;
A first communication interface unit provided in the first arithmetic processing unit and capable of receiving data from the external device at a higher speed than the communication by the second communication interface unit;
A cooperative communication unit that displays the display content on the display unit by linking the first arithmetic processing unit and the second arithmetic processing unit.
It is a display device characterized by having .

Claims (13)

Display part,
A first arithmetic processing unit that transmits data related to display contents displayed on the display unit by the display unit and a first interface;
A second arithmetic processing unit that transmits data related to display contents displayed on the display unit by the display unit and a second interface;
The first arithmetic processing unit, after the switching, when the display content displayed on the display unit is switched in an operating state in which the data related to the display content displayed on the display unit by the first interface is transmitted. It is determined whether or not to transmit the predetermined first notification signal to the second arithmetic processing unit based on the content of the image, and it is determined that the first notification signal is transmitted to the second arithmetic processing unit. In this case, the first notification signal is transmitted to the second arithmetic processing unit,
When the first arithmetic processing unit transmits the first notification signal, the second arithmetic processing unit receives the first notification signal, and a display displayed on the display unit by the second interface. A display device, characterized in that a transition is made to an operation state in which data related to content is transmitted. The first arithmetic processing unit, after the switching, when the display content displayed on the display unit is switched in an operating state in which the data related to the display content displayed on the display unit by the first interface is transmitted. If the display content of the image is smaller than the display content of the image before switching, the display area of the image to be updated is narrow, the predetermined first notification signal is transmitted to the second arithmetic processing unit. The display device according to claim 1, wherein the display device determines. The first arithmetic processing unit, after the switching, when the display content displayed on the display unit is switched in an operating state in which the data related to the display content displayed on the display unit by the first interface is transmitted. When the display content of the image is a display content in which the amount of change over time is smaller than the display content of the image before switching, it is determined that the predetermined first notification signal is transmitted to the second arithmetic processing unit. The display device according to claim 1, wherein: The first arithmetic processing unit, after the switching, when the display content displayed on the display unit is switched in an operating state in which the data related to the display content displayed on the display unit by the first interface is transmitted. If the image data amount of the image is smaller than the image data amount of the image before switching, it is determined that the predetermined first notification signal is transmitted to the second arithmetic processing unit. Display device according to. After transmitting the first notification signal, the first arithmetic processing unit transitions to an operation state in which data related to display contents displayed on the display unit by the first interface is not transmitted.
The display device according to claim 1, wherein the display device is a display device. The second arithmetic processing unit, in an operation state in which data related to display contents displayed on the display unit by the second interface is transmitted, according to the display contents displayed on the display unit. Transmitting a predetermined second notification signal to the arithmetic processing unit,
The first arithmetic processing unit, after receiving the second notification signal, transitions to an operation state in which data related to display contents displayed on the display unit by the first interface is transmitted.
The display device according to claim 5, wherein: The display content displayed on the display unit includes a time display related to hours, minutes, and seconds,
The second arithmetic processing unit, in an operating state in which data related to the display content displayed on the display unit by the second interface is transmitted, a time corresponding to the second in the display content displayed on the display unit. Transmitting a predetermined second notification signal to the first arithmetic processing unit according to the content of the display,
The display device according to claim 6, wherein: The second arithmetic processing unit, after transmitting the second notification signal, transitions to an operating state in which data related to display contents displayed on the display unit by the second interface is not transmitted.
The display device according to claim 6, wherein the display device is a display device. Each of the first arithmetic processing unit and the second arithmetic processing unit has a communication interface capable of communicating with an external device,
9. The communication interface included in the first arithmetic processing unit is capable of performing data communication at a higher speed than the communication interface included in the second arithmetic processing unit. Display device. The first interface is a parallel interface,
The second interface is a serial interface,
The display device according to claim 1, wherein the display device is a display device. When the first arithmetic processing unit determines not to transmit the first notification signal to the second arithmetic processing unit, the first arithmetic processing unit does not transmit the first notification signal to the second arithmetic processing unit. The display device according to any one of claims 1 to 10, wherein data relating to the content of the image after the switching displayed on the display unit is transmitted. A display unit, a first arithmetic processing unit for transmitting data related to display contents displayed on the display unit by the display unit and a first interface, and a display unit for displaying on the display unit by the display unit and a second interface A second arithmetic processing unit for transmitting data related to the displayed contents, and a display control method for a display device, comprising:
After the switching, when the display content displayed on the display unit is switched in the operation state in which the first arithmetic processing unit transmits data related to the display content displayed on the display unit by the first interface. When it is determined whether or not to transmit the predetermined first notification signal to the second arithmetic processing unit based on the content of the image, and when it is determined that the first notification signal is transmitted to the second arithmetic processing unit Transmitting the first notification signal to the second arithmetic processing unit,
When the first arithmetic processing unit transmits the first notification signal, the second arithmetic processing unit receives the first notification signal and is displayed on the display unit by the second interface. A step of transitioning to an operation state in which data related to the content is transmitted
A display control method comprising: A first arithmetic processing unit for transmitting data relating to display contents displayed on the display unit by the display unit and the first interface; and display contents displayed on the display unit by the display unit and the second interface. A second arithmetic processing unit for transmitting data relating to
The first arithmetic processing unit of the display device including
When the display content displayed on the display unit is switched in the operating state in which the data related to the display content displayed on the display unit is transmitted by the first interface, the first interface is used based on the content of the switched image. If it is determined whether or not a predetermined first notification signal is transmitted to the second arithmetic processing unit, and it is determined that the first notification signal is transmitted to the second arithmetic processing unit, the first notification signal To function as a means for transmitting to the second arithmetic processing unit,
The second arithmetic processing unit of the display device,
An operation state in which, when the first arithmetic processing unit transmits the first notification signal, the first notification signal is received, and the data related to the display content displayed on the display unit by the second interface is transmitted. Transition to,
A program characterized by that.

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