JP7385349B2 - Electronic equipment, display control methods and programs - Google Patents

Description

The present invention relates to an electronic device, a display control method, and a program suitable for devices including a display section using a self-luminous display element.

2. Description of the Related Art In a display device using organic EL (Electro Luminescence) as a display element, a technique has been proposed in which control is performed to perform display at optimal brightness depending on surrounding brightness (for example, Patent Document 1).

Japanese Patent Application Publication No. 2001-100697

Including the technology described in Patent Document 1, generally speaking, as the brightness of the surrounding environment increases, the luminance of the display element also increases, thereby preventing the content displayed on the screen from becoming difficult to see to some extent. can do.

In recent years, wearable terminals that are worn on a user's body and collect necessary information from the user in cooperation with a mobile communication terminal such as a smartphone are becoming popular. Among these types of wearable terminals, wrist terminals, which are worn on the user's wrist and display various types of image information according to the user's actions on a display section if necessary, are particularly popular, as they can usually be used simply as a wristwatch. Widely popular.

By equipping this wrist terminal with an illuminance sensor, it is possible to increase the luminance of the display unit accordingly when the surroundings are bright, thereby avoiding the difficulty of viewing the display to some extent, but this is especially true for wearable terminals. In addition to the watch function when the application program is not running, the list terminal uses battery power with limited capacity for operations when the application program is running, including data communication with smartphones, etc. There is also a need to further reduce power consumption per unit time.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide an electronic device, a display control method, and a program that can reduce power consumption while maintaining necessary display quality. Our goal is to provide the following.

One aspect of the present invention is an electronic device having a display section, the brightness information acquisition means for acquiring brightness information around the display section, a first display mode, and the first display mode. In a different second display mode, the brightness setting means is provided with a brightness setting means for setting and driving the brightness of the display section higher as the acquired brightness information is brighter , and a secondary battery as a power source. sets the maximum brightness of the display section in the second display mode to be lower than the maximum brightness of the display section in the first display mode, and sets the maximum brightness of the display section in the second display mode to The process of setting the brightness to be lower than the maximum brightness of the display unit in the first display mode is to set the upper limit of the maximum brightness of the display unit in the second display mode to be lower than the maximum brightness of the display unit in the first display mode. The brightness setting means sets the maximum brightness of the display unit to a value lower than a lower limit value of the maximum brightness of the display unit in the second display mode when the electronic device is being charged. , is set lower than the upper limit of the maximum brightness of the display unit in the second display mode when the electronic device is operated with the secondary battery.

According to the present invention, it is possible to reduce power consumption while maintaining necessary display quality.

FIG. 1 is a block diagram showing a functional configuration of an electronic circuit of a wrist terminal according to an embodiment of the present invention. 7 is a flowchart illustrating the process of determining the maximum brightness on the display unit according to the surrounding environment according to the embodiment. FIG. 3 is a diagram showing the relationship between ambient illuminance and display brightness during battery operation according to the same embodiment. FIG. 7 is a diagram showing the relationship between peripheral illuminance and display brightness during operation during charging according to the same embodiment.

Hereinafter, an example of the case where the present invention is applied to a wrist terminal worn on the wrist of a user and used in conjunction with a data communication device (not shown) such as a smartphone to assist the user's recreational activities etc. Embodiments will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the functional configuration of an electronic circuit of a wrist terminal 10 according to the embodiment. In the figure, this wrist terminal 10 operates mainly with a processor 11, a work memory 12, and a program memory 13.

Here, the processor 11 reads operating programs and various fixed data stored in the program memory 13 made up of non-volatile memory such as flash memory, develops them in the work memory 12 made up of SRAM, etc., and causes them to be retained. Then, by sequentially executing the operation programs, the operations, etc. to be described later are controlled in an integrated manner.

These processor 11, work memory 12, and program memory 13 are connected via bus B to display section 14, touch input section 15, GPS reception section 16, illuminance sensor 17, acceleration sensor 18, barometric pressure sensor 19, and geomagnetic sensor 20. , a temperature sensor 21, an operation section 22, a vibrator 23, and a wireless communication section 24 are connected.

The display section 14 is composed of an organic EL (hereinafter referred to as "OLED") which is a self-luminous element and a driving circuit thereof, and performs display based on display data given from the processor 11.
The touch input unit 15 is composed of a touch panel formed with transparent electrodes and its drive circuit, which is integrally formed on the upper part of the display unit 14, and when there is a pressing operation with a user's finger, etc., the touch input unit 15 inputs time-series coordinates. Position data is detected and sent to the processor 11.

A GPS (Global Positioning System) receiving unit 16 receives incoming radio waves from a plurality of GPS satellites (not shown) via a GPS antenna 25, and determines the three-dimensional coordinates (latitude, longitude, altitude) of the current location. and the current time, and sends the calculation result to the processor 11.

The illuminance sensor 17 is disposed near the end of the display section 14 and detects the brightness of the surrounding environment of the display section 14 as illuminance.

The acceleration sensor 18 detects acceleration along three mutually orthogonal axes, thereby determining the posture of the user wearing the wrist terminal 10 (including the direction of gravitational acceleration) and the direction of the applied external force. Detect.

The atmospheric pressure sensor 19 detects changes in the atmospheric pressure state by detecting atmospheric pressure. By combining the detection output of the atmospheric pressure sensor 19 with the altitude information obtained from the output of the GPS receiver 16, it can also be used to estimate the altitude after the point in time when GPS positioning becomes impossible.

The geomagnetic sensor 20 is composed of, for example, a magnetoresistive element (MR sensor), and detects the direction in which the wrist terminal 10 faces, including the magnetic north direction.

Temperature sensor 21 detects temperature. The detection outputs of the illuminance sensor 17, acceleration sensor 18, atmospheric pressure sensor 19, geomagnetic sensor 20, and temperature sensor 21 are sent to the processor 11 at appropriate times.

The operation unit 22 is provided on the outer surface of the wrist terminal 10 , receives input from keys directly operated by the user, and sends a key operation signal to the processor 11 .

The vibrator 23 is composed of a motor having an eccentric weight attached to a rotating shaft and a driving section thereof, and is driven at the time of an alarm or the like to generate vibration and swing the entire wrist terminal 10.

The wireless communication unit 24 performs data communication with a nearby smartphone or the like via the antenna 26 using, for example, short-range wireless communication technology based on the Bluetooth (registered trademark) LE (Low Energy) standard.

Although not shown, this wrist terminal 10 uses a secondary battery, for example, a lithium ion secondary battery, as a power source, and utilizes electromagnetic coupling formed on the side surface of the casing of the wrist terminal 10. It is assumed that the processor 11 recognizes and manages the charging control state of the secondary battery, including the connection state to the charging terminal.

Next, the operation of the above embodiment will be explained.
In this embodiment, when operating the wrist terminal 10, the display state on the display unit 14 using OLED, which is a self-luminous element, is in the normal mode and the ratio of black display compared to the normal mode. After selecting one of the ambient modes with a large number of images, the processor 11 performs display control. Due to the characteristics of OLED, black display consumes the least power, so in ambient mode, the proportion of black display is higher than in normal mode, so power consumption is lower than in normal mode. The state will be as follows.

In the normal mode, the maximum brightness is set based on the illuminance environment, and then the gradation information of the original display data is linearly reproduced on the display unit 14.

On the other hand, in ambient mode, although the maximum brightness is set lower than in normal mode, the maximum brightness is set based on the illuminance environment, and display data The gradation information is converted to emphasize contrast and then reproduced on the display unit 14.

In this case, the image displayed on the display unit 14 is prone to so-called overexposure and blackout due to contrast enhancement processing, and minute gradation expression is lost, but the brightness of the entire screen is The setting prioritizes the ease of viewing the image, including the fact that it has deteriorated.

In the normal mode, for example, when it is determined that the display unit 14 and the touch input unit 15 are in a substantially horizontal state based on the detection output of the acceleration sensor 18 and the user is visually recognizing the display unit 14, the touch input unit 15 or When performing an alarm notification that has been set in response to a user operation using the operation unit 22, a preset time, or communication access, the display state is maintained in the running operating program. The display mode is such as when being controlled.

In the ambient mode, for example, when it is determined that the display unit 14 and the touch input unit 15 are in a substantially horizontal state based on the detection output of the acceleration sensor 18 and the user is visually recognizing the display unit 14, the ambient mode It is determined that the alarm notification that was set in response to a user's operation on the input unit 15 or the operation unit 22, a preset time, or communication access has been interrupted. For this reason, the display mode is changed to after a certain period of time, for example, 5 seconds has elapsed.

Note that the time width for maintaining the normal mode can be fixed or variably set as desired by the user.

FIG. 2 shows a series of steps for determining the maximum brightness on the display unit 14 according to the surrounding environment, which is executed by the processor 11 at a predetermined period of time, for example, 0.2 [seconds] while displaying on the display unit 14. 3 is a flowchart showing the processing contents.

At the beginning of the process, the processor 11 detects the illuminance near the display unit 14 using the illuminance sensor 17 (step S101).

The processor 11 determines whether the display mode of the display unit 14 at that time is the ambient mode (step S102). If it is determined that the mode is not the ambient mode (No in step S102), the display mode is the normal mode, so the processor 11 uses the illuminance detected from the illuminance sensor 17 as a variable x, and sets the maximum brightness y in the normal mode. The maximum brightness y at that point in time is determined using the mathematical formula "y=ax+b" (a and b are constants set in advance) (step S103).

The processor 11 changes and adjusts the gradation of each pixel forming the image displayed on the display unit 14 so that the determined maximum brightness y becomes the full gradation value of each pixel displayed on the display unit 14 at that time. (Step S104), and the process of FIG. 2 is thus completed.

FIG. 3 is a diagram illustrating the relationship between ambient illuminance and maximum brightness in normal mode and ambient mode when the wrist terminal 10 is operated using a battery as a power source.

FIG. 4 is a diagram illustrating the relationship between ambient illuminance and maximum brightness in the normal mode and ambient mode when the battery of the power source of the wrist terminal 10 is being charged.

The relationship "y=ax+b" between the ambient illuminance and the maximum brightness in the normal mode is constant during both the battery operation shown in FIG. 3 and the charging operation shown in FIG.

The maximum brightness when the peripheral illuminance is the lowest, that is, when the wrist terminal 10 is operating in the dark, is defined as b. In addition, as the ambient illuminance increases, the maximum brightness y is set to increase linearly according to the slope a (a>0) until it reaches the maximum illuminance that can be detected by the illuminance sensor 17.

Further, in step S102, if it is determined that the display mode of the display unit 14 at that time is the ambient mode (Yes in step S102), then the processor 11 determines that the wrist terminal 10 is in battery operation and that the wrist terminal 14 is in the ambient mode. It is determined whether or not the battery is being charged (step S105).

If it is determined that the wrist terminal 10 is in battery operation and not charging the wrist terminal 10 (Yes in step S105), the processor 11 uses the illuminance detected from the illuminance sensor 17 as a variable x to The maximum brightness y at that time is determined using the formula "y=cx+d1" (c and d1 are respectively preset constants, 0<c<a, d1<b) for determining the maximum brightness y (step S106). .

Furthermore, in the ambient mode, an upper limit value of maximum brightness is set. Therefore, the processor 11 determines whether the maximum brightness y determined in step S106 is greater than or equal to the upper limit value e1 during battery operation (step S107).

If it is determined that the maximum brightness y is less than the upper limit value e1 during battery operation (No in step S107), the processor 11 directly adopts the determined maximum brightness y.

Further, in step S107, if it is determined that the determined maximum brightness y is equal to or higher than the upper limit value e1 during battery operation (Yes in step S107), the processor 11 again sets the maximum brightness y in the ambient mode to "y=e1". (Step S108).

The processor 11 changes and adjusts the gradation of each pixel forming the image displayed on the display unit 14 so that the determined maximum brightness y becomes the full gradation value of each pixel displayed on the display unit 14 at that time. (Step S104), and the process of FIG. 2 is thus completed.

FIG. 3 above illustrates the relationship between ambient illuminance and maximum brightness in the ambient mode during battery operation, together with the relationship in the normal mode. The maximum illuminance when the peripheral illuminance is the lowest, that is, when the wrist terminal 10 is operating in darkness, is defined as d1. In addition, as the peripheral illumination increases, the maximum brightness y linearly increases according to the slope c (0<c<a) until the maximum brightness reaches the upper limit e1. However, after the maximum brightness reaches the upper limit e1, the setting is such that the maximum brightness y does not change at the upper limit e1 even if the peripheral illuminance increases.

The upper limit value e1 of the maximum brightness is set lower than the minimum value b of the maximum brightness y in the normal mode.

The ambient mode is a mode in which the user can visually confirm that the display state is maintained on the display unit 14 and that the displayed content is readable. This is provided to keep power consumption low and to avoid shortening the lifespan of the OLED due to high-intensity light emission.

If a clear display state on the display unit 14 is required, the user can immediately switch to normal mode by, for example, touching the touch input unit 15 with a finger or lightly operating any button key on the operation unit 22. Since the display will remain in normal mode until a certain period of time passes after the device has recovered, it is unlikely that you will feel stressed by the low display brightness in ambient mode. .

Further, in step S105, if it is determined that the wrist terminal 10 is not in battery operation but is charging the wrist terminal 10 (No in step S105), the processor 11 converts the illuminance detected from the illuminance sensor 17 into the variable x According to the formula "y=cx+d2" (c and d2 are constants set in advance, respectively, 0<c<a, d2<d1<b) to determine the maximum brightness y in ambient mode, the maximum brightness at that time is determined. y is determined (step S109).

Additionally, an upper limit for maximum brightness is set even in ambient mode during charging. Therefore, the processor 11 determines whether the maximum brightness y determined in step S109 is above the upper limit value e2 during charging (step S110).

If it is determined that the maximum brightness y is less than the upper limit value e2 during charging (No in step S110), the processor 11 directly adopts the determined maximum brightness y.

Further, in step S110, if it is determined that the determined maximum brightness y is equal to or higher than the upper limit e2 during charging (Yes in step S110), the processor 11 sets the maximum brightness y in the ambient mode to "y=e2" again. Determine (step S111).

The processor 11 changes and adjusts the gradation of each pixel forming the image displayed on the display unit 14 so that the determined maximum brightness y becomes the full gradation value of each pixel displayed on the display unit 14 at that time. (Step S104), and the process of FIG. 2 is thus completed.

FIG. 4 exemplifies the relationship between the peripheral illuminance and the maximum brightness in the ambient mode during charging, together with the relationship in the normal mode. The maximum illuminance when the peripheral illuminance is the lowest, that is, when the wrist terminal 10 is operating in darkness, is defined as d2. In addition, as the peripheral illuminance increases, the maximum brightness y linearly increases according to the slope c (0<c<a) until the maximum brightness reaches the upper limit e2. However, after the maximum brightness reaches the upper limit e2, the setting is such that the maximum brightness y does not change at the upper limit e2 even if the peripheral illuminance increases.

It is the same ambient mode, and the slope c when setting the maximum brightness higher as the illuminance increases is the same, but the maximum illuminance d1 when the ambient illuminance is the lowest during battery operation is compared to the upper limit e1. The reason why both the maximum illuminance d2 and the upper limit e2 are set low when the ambient illuminance during charging is the lowest is that when the wrist terminal 10 is being charged and is displayed in ambient mode, it is especially difficult for the user to This is a setting for suppressing the maximum brightness in order to avoid further shortening the life of the OLED, assuming that the demand for watching the part 14 is low.

On the other hand, since it is determined that there is no need to keep the power consumption of the display unit 14 so low while charging, in the ambient mode during charging, the maximum illuminance is set at the lowest ambient illuminance during charging. d2 and the upper limit e2 may be set higher than the maximum illuminance d1 when the ambient illumination is at its lowest during battery operation and the upper limit e1, respectively.

Regarding the adjustment of the maximum brightness in the ambient mode depending on whether or not charging is being performed, the user may be able to arbitrarily set the maximum brightness, including whether or not to perform such adjustment.

As described in detail above, according to this embodiment, it is possible to reduce power consumption while maintaining necessary display quality.

Furthermore, in the present embodiment, by setting an upper limit to the maximum brightness in the ambient mode, it is possible to further avoid shortening the lifespan of the display section 14 using an OLED, which is a self-luminous element.

In particular, by setting the maximum brightness in ambient mode to be clearly lower than the maximum brightness in normal mode under the same illuminance environment, it is possible to reliably reduce power consumption and extend the lifespan of self-luminous elements. .

Furthermore, in the present embodiment, in the ambient mode, gradation control including contrast enhancement is applied to the image displayed on the display unit 14, thereby making it possible to compensate for a decrease in brightness and maintain the visibility of the image.

Further, in this embodiment, since the normal mode and the ambient mode where the maximum brightness is suppressed are selectively switched, the control is easier compared to the case where the screen is partially switched, and the processor 11 In addition to reducing the burden on users, it also makes it easier for users to understand the display mode status, especially on devices such as wrist terminals that have small display sections and require intuitive operation during activities such as outdoor leisure activities. You can easily return to normal mode if necessary.

In this embodiment, the conditions for transitioning to the normal mode include, for example, when the user operates the touch input section 15 or the operation section 22 included in the wrist terminal 10, at a preset time, or when there is communication access. Since this is set at the time of activation when alarm notification is performed, etc., it is possible to simplify the operation of the user using the wrist terminal 10 and provide a display state with brightness as required.

In addition, in normal mode, the system automatically switches to ambient mode when there is no user operation on the wrist terminal 10 for a certain period of time, so power consumption can be reliably reduced without putting a burden on the user. It is possible to achieve a reduction in energy consumption and a longer lifespan of self-luminous elements.

Furthermore, in this embodiment, the power source of the wrist terminal 10 is a secondary battery, and the maximum brightness in ambient mode is adjusted to increase or decrease depending on whether or not the secondary battery is charged, so that it can be adjusted according to the user's usage preference. It is now possible to customize the ambient mode according to the user's needs, further improving the product appeal.

In addition, in this embodiment, in the ambient mode, in the mathematical formula "y=cx+d1" (for battery operation) and "y=cx+d2" (for operation during charging) that determine the maximum brightness y, the ambient illuminance is the lowest. As the ambient illuminance increases, the maximum brightness y increases according to the slope c, and when the maximum brightness y reaches the upper limit e1 (in the case of battery operation) or the upper limit value e2 (in the case of battery operation), from then on, Even if the ambient illuminance increases, the maximum luminance y is controlled to remain at e1 (in the case of battery operation) or e2 (in the case of battery operation), but in the case of the maximum illuminance that can be detected by the illumination sensor 17, The slope c may be set so that the maximum brightness y becomes e1 (in the case of battery operation) or e2 (in the case of battery operation).

Further, in this embodiment, an OLED is used as the display section 14, but a normal liquid crystal display section equipped with a backlight may be used instead of the OLED, and in that case, the brightness of the backlight is controlled. Accordingly, the brightness of the display section can be controlled.

Furthermore, in this embodiment, a case has been described in which the case is applied to a wrist terminal device worn on the wrist of a user to assist the user's recreational activities etc. in cooperation with a data communication device such as a smartphone. The present invention is not limited to this, and can be similarly applied to any electronic device having a self-luminous display section.

In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made at the implementation stage without departing from the gist thereof. Moreover, each embodiment may be implemented by appropriately combining them as much as possible, and in that case, the combined effects can be obtained. Further, the embodiments described above include inventions at various stages, and various inventions can be extracted by appropriately combining the plurality of disclosed constituent elements. For example, even if some constituent features are deleted from all the constituent features shown in the embodiments, the problem described in the column of problems to be solved by the invention can be solved, and the effect described in the column of effects of the invention can be achieved. If this is obtained, a configuration in which this component is deleted can be extracted as an invention.

[Claim 1]
An electronic device having a display section,
Brightness information acquisition means for acquiring brightness information around the display section;
In a first display mode and a second display mode different from the first display mode, the brighter the acquired brightness information, the higher the brightness of the display unit is set and driven;
Equipped with
The brightness setting means sets the maximum brightness of the display unit in the second display mode to be lower than the maximum brightness in the first display mode.
Electronics.
[Claim 2]
2. The electronic device according to claim 1, wherein the brightness setting means sets an upper limit value of the brightness of the display unit when the brightness information is equal to or higher than a predetermined brightness in the second display mode.
[Claim 3]
2. The electronic device according to claim 1, wherein the brightness setting means sets the maximum brightness of the display unit in the second display mode to be lower than the minimum brightness in the first display mode.
[Claim 4]
The display section is a self-luminous display section, and the second display mode is different from the first display mode by increasing the proportion of black display compared to the first display mode. 4. The electronic device according to claim 1, wherein the electronic device has low power consumption.
[Claim 5]
5. The electronic device according to claim 4, wherein the second display mode performs display in which an image displayed on the display section is subjected to gradation control including contrast enhancement, compared to the first display mode.
[Claim 6]
further comprising a switching means for selectively switching between the first display mode and the second display mode,
The switching means switches to the first display mode when a preset condition is satisfied in the electronic device during the second display mode.
An electronic device according to any one of claims 1 to 5.
[Claim 7]
The above preset conditions include operation of the operation unit provided in the electronic device, activation of an alarm set in the electronic device, and access from an external device to the communication unit provided in the electronic device. The electronic device according to claim 6, wherein the electronic device is at least one.
[Claim 8]
The switching means includes at least one of the following: an operation on an operation section provided in the electronic device, activation of an alarm set in the electronic device, and access from an external device to a communication section provided in the electronic device. 7. The electronic device according to claim 6, wherein the electronic device switches to the second display mode after a certain period of time has elapsed from when it is determined that the conditions have been discontinued after switching to the first display mode when two conditions are satisfied. .
[Claim 9]
The above electronic device is equipped with a secondary battery as a power source,
The brightness setting means increases or decreases the brightness of the display section in the second display mode depending on whether or not the secondary battery is charged.
An electronic device according to any one of claims 1 to 8.
[Claim 10]
A display control method in a device having a display section, the method comprising:
a brightness information acquisition step of acquiring brightness information around the display section;
In a first display mode and a second display mode different from the first display mode, the brighter the acquired brightness information, the higher the brightness of the display unit is set and driven;
has
The brightness setting step sets the maximum brightness of the display section in the second display mode to be lower than the maximum brightness in the first display mode.
Display control method.
[Claim 11]
A program executed by a computer built into a device having a display section, the program comprising:
Brightness information acquisition means for acquiring brightness information around the display section;
In a first display mode and a second display mode different from the first display mode, the brighter the acquired brightness information, the higher the brightness of the display unit is set and driven;
and make it work,
The brightness setting means sets the maximum brightness of the display section in the second display mode to be lower than the maximum brightness in the first display mode.
program.

10...Wrist terminal 11...Processor 12...Work memory 13...Program memory 14...Display unit (OLED)
15...Touch input section 16...GPS receiving section 17...Illuminance sensor 18...Acceleration sensor 19...Atmospheric pressure sensor 20...Geomagnetic sensor 21...Temperature sensor 22...Operation section 23...Vibrator 24...Wireless communication section 25...GPS antenna 26...Antenna B …bus

Claims (10)

An electronic device having a display section,
Brightness information acquisition means for acquiring brightness information around the display section;
In a first display mode and a second display mode different from the first display mode, the brighter the acquired brightness information, the higher the brightness of the display unit is set and driven;
A secondary battery as a power source,
Equipped with
The brightness setting means sets the maximum brightness of the display unit in the second display mode to be lower than the maximum brightness of the display unit in the first display mode,
The process of setting the maximum brightness of the display section in the second display mode to be lower than the maximum brightness of the display section in the first display mode is the process of setting the maximum brightness of the display section in the second display mode to including a process of setting an upper limit value of brightness lower than a lower limit value of maximum brightness of the display section in the first display mode,
The brightness setting means sets an upper limit value of the maximum brightness of the display unit in the second display mode when the electronic device is being charged to a maximum brightness value in the second display mode when the electronic device is operating on the secondary battery. Set lower than the upper limit of the maximum brightness of the display section in the display mode.
Electronics. The brightness setting means changes the amount of change in the maximum brightness value of the display unit calculated based on the brightness information in the second display mode to the brightness information in the first display mode. 2. The electronic device according to claim 1, wherein the setting is set to be smaller than the amount of change in the maximum brightness value of the display unit calculated based on the value. The brightness setting means sets an upper limit value of the brightness of the display section corresponding to the brightness information in the second display mode, and when the brightness information is equal to or higher than a predetermined brightness, the brightness setting means 3. The electronic device according to claim 1, wherein the maximum brightness of the part is set to the upper limit value. The display section is a self-luminous display section, and the second display mode is different from the first display mode by increasing the proportion of black display compared to the first display mode. 4. The electronic device according to claim 1, wherein the electronic device has low power consumption. 5. The electronic device according to claim 4, wherein the second display mode performs display in which an image displayed on the display section is subjected to gradation control including contrast enhancement, compared to the first display mode. further comprising a switching means for selectively switching between the first display mode and the second display mode,
The switching means switches to the first display mode when a preset condition is satisfied in the electronic device during the second display mode.
An electronic device according to any one of claims 1 to 5. The above preset conditions include operation of the operation unit provided in the electronic device, activation of an alarm set in the electronic device, and access from an external device to the communication unit provided in the electronic device. The electronic device according to claim 6, wherein the electronic device is at least one. The switching means includes at least one of the following: an operation on an operation section provided in the electronic device, activation of an alarm set in the electronic device, and access from an external device to a communication section provided in the electronic device. 7. The electronic device according to claim 6, wherein the electronic device switches to the second display mode after a certain period of time has elapsed from when it is determined that the conditions have been discontinued after switching to the first display mode when two conditions are satisfied. . A display control method in a device having a display section and a secondary battery as a power source, the method comprising :
a brightness information acquisition step of acquiring brightness information around the display section;
In a first display mode and a second display mode different from the first display mode, the brighter the acquired brightness information, the higher the brightness of the display unit is set and driven;
has
The brightness setting step includes setting the maximum brightness of the display unit in the second display mode to be lower than the maximum brightness of the display unit in the first display mode,
The step of setting the maximum brightness of the display part in the second display mode to be lower than the maximum brightness of the display part in the first display mode includes the step of setting the maximum brightness of the display part in the second display mode to including the step of setting an upper limit value of brightness lower than a lower limit value of maximum brightness of the display section in the first display mode,
In the brightness setting step, the upper limit of the maximum brightness of the display unit in the second display mode when the device is charging is set to the upper limit of the maximum brightness of the display unit in the second display mode when the device is operating on the secondary battery. including the step of setting the maximum brightness of the display unit lower than the upper limit value in the mode,
Display control method. A program executed by a computer incorporating a device having a display section and a secondary battery as a power source , the computer comprising:
Brightness information acquisition means for acquiring brightness information around the display section;
In a first display mode and a second display mode different from the first display mode, the brighter the acquired brightness information, the higher the brightness of the display unit is set and driven;
and make it work,
The brightness setting means sets the maximum brightness of the display unit in the second display mode to be lower than the maximum brightness of the display unit in the first display mode,
The means for setting the maximum brightness of the display section in the second display mode to be lower than the maximum brightness of the display section in the first display mode includes: comprising means for setting an upper limit value of brightness lower than a lower limit value of maximum brightness of the display section in the first display mode,
The brightness setting means sets an upper limit of the maximum brightness of the display unit in the second display mode when the device is charging to the second display mode when the device is operating on the secondary battery. Set the brightness lower than the upper limit of the maximum brightness of the display section in mode,
program.