JP7035692B2 - Electronic devices, brightness control methods and programs - Google Patents

Description

The present invention relates to electronic devices, luminance control methods and programs.

Conventionally, there is known a technique in which an illuminance sensor is placed behind the light irradiation surface of an OLED (Organic Light Emitting Diode) as a display unit, and the light amount of the OLED is adjusted according to the amount of external light detected by the illuminance sensor (Patent Document). See 1).

U.S. Patent Application Publication No. 2014/0132158

However, in the configuration of Patent Document 1, the illuminance detected may differ depending on the display content on the display unit even under the same amount of external light.
For example, when the displayed content is displayed at a position overlapping the illuminance sensor in the incident direction of the external light, the incident light to the illuminance sensor is affected by the emission of the displayed content. That is, when the amount of light emitted from the displayed content changes, the illuminance sensor considers that the amount of external light has changed and detects the illuminance. In such a case, the illuminance sensor cannot detect an appropriate illuminance based on an actual change in the amount of external light.

An object of the present invention is to provide an electronic device capable of detecting an appropriate illuminance regardless of the display content in an electronic device in which an illuminance sensor is arranged on the back side of a display unit.

In order to achieve the above object, the electronic device of one aspect of the present invention is
Display means and
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the illuminance detecting means arranged on the back side of the display surface of the display means and detecting the illuminance, and the illuminance detecting means.
A control means for controlling the display content of the light emitting region so as to suppress the change in the illuminance due to the change in the display content of the light emitting region in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means. , It is characterized by having.

According to the present invention, in an electronic device in which an illuminance sensor is arranged on the back side of a display unit, it is possible to provide an electronic device capable of detecting an appropriate illuminance regardless of the display content.

It is a schematic diagram of the electronic device which is one Embodiment of this invention. It is a block diagram which shows the hardware composition of an electronic device. It is a schematic diagram which shows the installation form of the illuminance sensor in the display area of the electronic device. It is a schematic diagram which shows the XX'cross section in FIG. 3A. Among the functional configurations of the electronic device of FIG. 2, it is a functional block diagram which shows the functional configuration for executing a luminance control process. It is a schematic diagram which shows the 1st display content of the electronic device of FIG. It is a schematic diagram which shows the 2nd display content of the electronic device of FIG. It is a schematic diagram which shows the 3rd display content of the electronic device of FIG. It is a flowchart explaining the flow of the luminance control process executed by the electronic device of FIG. 1 having the functional configuration of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Constitution]
FIG. 1 is a schematic view of an electronic device 1 according to an embodiment of the present invention.
As shown in FIG. 1, the electronic device 1 of the present embodiment is configured as a wristwatch-type device (smart watch or the like). Further, the electronic device 1 includes a first display unit 18 and a second display unit 24 (described later), and the second display unit 24 is laminated on the first display unit 18. Further, a touch panel 17, which will be described later, is provided on the second display unit 24. Therefore, in the electronic device 1, it is possible to superimpose the display of the second display unit 24 on the display of the first display unit 18 and to perform a touch operation on the display content. ..

FIG. 2 is a block diagram showing a hardware configuration of the electronic device 1.
As shown in FIG. 2, the electronic device 1 includes a CPU (Central Positioning Unit) 11, a ROM (Read Only Memory) 12, a RAM (Radom Access Memory) 13, a storage unit 14, and an RTC (Real Time Block). A unit 15, a drive 16, a touch panel 17, a first display unit 18, a first input unit 19, a Bluetooth (registered trademark) antenna 20, a Bluetooth module 21, and a wireless LAN (Local Area Network) antenna 22. , Wireless LAN module 23, second display unit 24, pulse sensor 25, geomagnetic sensor 26, acceleration sensor 27, gyro sensor 28, illuminance sensor 29, second input unit 30, GPS (Global). A Positioning System) antenna 31 and a GPS module 32 are provided.

The CPU 11 is composed of a first CPU 11A and a second CPU 11B.
The first CPU 11A controls a function similar to a smartphone in the electronic device 1 by performing various arithmetic processing and executing the processing of the OS. In the present embodiment, the first CPU 11A displays an incoming e-mail received via the Bluetooth module 21 or the wireless LAN module 23, a message related to weather information, or the like on the first display unit 18, or is input via the touch panel 17. Accepts operations. In addition, the first CPU 11A recognizes the voice input via the first input unit 19, and also performs processing related to various functions implemented as functions similar to smartphones.
Further, in the present embodiment, the first CPU 11A acquires a time signal from the RTC unit 15 at a predetermined timing.

By executing the processing of a specific program, the second CPU 11B gives a display instruction to the second display unit 24, acquires the detection results of various sensors, and other various functions implemented as a wristwatch function. Such processing is performed. In the present embodiment, the second CPU 11B calculates the time based on the time signal input from the first CPU 11A, and displays the time, the day of the week, the date, etc. on the second display unit 24. The processing of a specific program (calculation of time, etc.) executed by the second CPU 11B is a simple operation as compared with the processing of the OS executed by the first CPU 11A, so that the processing load is small and the processing can be executed with low power consumption. Therefore, the hardware specifications required for the second CPU 11B may be lower than those of the first CPU 11A.

The ROM 12 can read data from each of the first CPU 11A and the second CPU 11B, and stores various programs and initial setting data executed by the first CPU 11A and the second CPU 11B. For example, the ROM 12 is an OS program executed by the first CPU 11A, various programs executed under the control of the OS, or a specific program executed by the second CPU 11B (here, an embedded program that realizes the function of the watch). Store the program.

The RAM 13 can read and write data from each of the first CPU 11A and the second CPU 11B, provides a memory space for work to the first CPU 11A and the second CPU 11B, and stores temporary data for work. For example, the RAM 13 provides a system area or work area when the first CPU 11A executes an OS, or provides a storage area when the second CPU 11B executes a specific program.

The storage unit 14 is a non-volatile memory capable of reading and writing data from each of the first CPU 11A and the second CPU 11B, and is, for example, a flash memory or an EEPROM (Electrically Erasable and Programmable Read Only Memory). The storage unit 14 stores various data (data of various setting contents, etc.) generated by various functions similar to smartphones, wristwatch functions, and the like.

A removable media 41 made of a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is appropriately mounted on the drive 16. The removable media 41 can store various data such as data detected by various sensors.
The touch panel 17 is a touch panel of a capacitance type or a resistance film type provided on the display screen of the second display unit 24. The touch panel 17 detects the user's touch operation position with respect to the operation surface and the operation content, generates a signal corresponding to the operation, and outputs the signal to the first CPU 11A as an input signal.

The first display unit 18 is composed of an organic EL display (OLED), and displays various information on a display screen under the control of the first CPU 11A.
The first input unit 19 includes a microphone that converts voice into an electric signal, and outputs a signal indicating the input voice (voice command for operation, etc.) to the first CPU 11A.

The Bluetooth antenna 20 is an antenna that transmits / receives electromagnetic waves based on the Bluetooth standard, and is composed of, for example, a monopole antenna or the like. The Bluetooth antenna 20 transmits an electric signal of wireless communication input from the Bluetooth module 21 as an electromagnetic wave, or converts the received electromagnetic wave into an electric signal and outputs the received electromagnetic wave to the Bluetooth module 21.
The Bluetooth module 21 transmits a signal to another device via the Bluetooth antenna 20 according to the instruction of the first CPU 11A. Further, the Bluetooth module 21 receives a signal transmitted from another device and outputs the information indicated by the received signal to the first CPU 11A.

The wireless LAN antenna 22 is an antenna capable of receiving radio waves having a frequency corresponding to the wireless communication used by the wireless LAN module 23, and is composed of, for example, a loop antenna or a rod antenna. The wireless LAN antenna 22 transmits an electric signal of wireless communication input from the wireless LAN module 23 as an electromagnetic wave, or converts the received electromagnetic wave into an electric signal and outputs it to the wireless LAN module 23.
The wireless LAN module 23 transmits a signal to another device via the wireless LAN antenna 22 according to the instruction of the first CPU 11A. Further, the wireless LAN module 23 receives a signal transmitted from another device and outputs the information indicated by the received signal to the first CPU 11A.

The second display unit 24 is composed of a PN (Polymer Network) liquid crystal display capable of partially or wholly transmitting light, and displays various information on a display screen (here, segment display) under the control of the second CPU 11B. ..
In the present embodiment, the PN liquid crystal display, which is the second display unit 24, is laminated on the display screen of the organic EL display, which is the first display unit 18 described above, as shown in FIG. 3B. In this PN liquid crystal display, liquid crystal molecules are arranged irregularly in a portion where an electric potential is not applied, and light is reflected. That is, the display is made by the PN liquid crystal display in the portion where this potential is not applied. On the other hand, in the portion where the potential is applied, the liquid crystal molecules are aligned perpendicular to the display screen, so that light can be transmitted. That is, since the light from the above-mentioned organic EL display can be transmitted at the portion where this potential is applied, the display by the organic EL display can be visually recognized via the PN liquid crystal display. That is, in the display area of the electronic device 1, the display by the first display unit 18 and the display by the second display unit 24 can be displayed in a superposed state.

The pulse sensor 25 is installed on the back surface side (the side facing the user's arm) of the electronic device 1 and detects the pulse of the user to which the electronic device 1 is attached.
The geomagnetic sensor 26 detects the direction of the geomagnetism and outputs information indicating the direction of the detected geomagnetism to the second CPU 11B.
The acceleration sensor 27 detects the acceleration in the three-axis direction in the electronic device 1, and outputs information indicating the detected acceleration to the second CPU 11B.
The gyro sensor 28 detects the angular velocity in the three-axis direction in the electronic device 1, and outputs information indicating the detected angular velocity to the second CPU 11B.

The illuminance sensor 29 is installed at a predetermined position on the back surface side of the first display unit 18, detects the brightness (illuminance) in the display area of the electronic device 1, and outputs information indicating the detected brightness to the second CPU 11B. As will be described later, the second CPU 11B executes a process of adjusting the brightness of the display screen of the first display unit 18 (luminance control process described later) based on the brightness detected by the illuminance sensor 29.

FIG. 3A is a schematic diagram showing an installation form of the illuminance sensor 29 in the display area of the electronic device 1. Further, FIG. 3B is a schematic view showing a cross section of XX'in FIG. 3A.
As shown in FIG. 3A, the illuminance sensor 29 is installed at a predetermined position in the display area of the first display unit 18 and the second display unit 24 (in FIG. 3B, the position at the lower right of the center shown by the broken line).
Further, as shown in FIG. 3B, the display area of the electronic device 1 is laminated in the order of the cover glass CG, the touch panel 17, the second display unit 24, the first display unit 18, the black sheet BS, and the main substrate MB from the front surface side. It has a cross-sectional structure.

Of these, the black sheet BS is a member that adjusts color development when visually recognized through the second display unit 24 and the first display unit 18, and in the present embodiment, the black sheet is visually recognized. There is. Further, a through hole H is formed in a part of the black sheet BS, and an illuminance sensor 29 is installed in the through hole H. Therefore, the illuminance sensor 29 has a structure in which light is incident from the surface side in the display area of the electronic device 1, the electronic device 1 is placed under bright outside light, and the illuminance in the display area is high. Alternatively, the user can operate the touch panel 17 of the electronic device 1 with a finger and detect that the illuminance of the display area is low because the touch panel 17 is covered with the finger.

Returning to FIG. 2, the second input unit 30 is composed of various buttons, and inputs various information according to a user's instruction operation.
The GPS antenna 31 receives a radio wave transmitted from a satellite in GPS, converts it into an electric signal, and outputs the converted electric signal (hereinafter, referred to as “GPS signal”) to the GPS module 32.
The GPS module 32 detects the position (latitude, longitude, altitude) of the electronic device 1 and the current time indicated by GPS based on the GPS signal input from the GPS antenna 31. Further, the GPS module 32 outputs information indicating the detected position and the current time to the second CPU 11B.

[Functional configuration]
Next, the functional configuration of the electronic device 1 will be described.
FIG. 4 is a functional block diagram showing a functional configuration for executing a luminance control process among the functional configurations of the electronic device 1 of FIG. 2.
The brightness control process determines the necessity of controlling the brightness of the display content at the time acquired by the time acquisition unit 52, controls the brightness of the display content according to the determination result, and then uses the illuminance sensor 29. A series of processes that adjust the brightness of the light emitting area based on the detected illuminance.

When the luminance control process is executed, as shown in FIG. 4, in the first CPU 11A, the illuminance information acquisition unit 51, the time acquisition unit 52, the luminance control unit 53, and the display content control unit 54 function. In the second CPU 11B, the sensor information acquisition unit 61 functions.
The illuminance information acquisition unit 51 acquires the illuminance detected by the sensor information acquisition unit 61 of the second CPU 11B.
The time acquisition unit 52 acquires the time detected by the RTC unit 15.

The luminance control unit 53 controls the luminance of the first display unit 18 based on the illuminance acquired by the illuminance information acquisition unit 51. That is, the luminance control unit 53 responds to the detected illuminance in order to prevent the display screen from becoming relatively dark and difficult to see when the electronic device 1 is placed in a bright (high illuminance) environment. The brightness of the first display unit 18 is controlled to a high brightness. On the other hand, when the electronic device 1 is placed in a dark environment (low illuminance), the brightness control unit 53 is low according to the detected illuminance in order to prevent the display screen from becoming excessively bright and difficult to see. The brightness of the first display unit 18 is controlled by the brightness. The luminance value corresponding to the illuminance is held in the electronic device 1 as, for example, table format data or a predetermined function, and the luminance control unit 53 appropriately uses the table format data or the predetermined function. Refer to it to control the brightness.

The display content control unit 54 controls the display content. For example, a clock is displayed in the light emitting area of the first display unit 18. The clock display is a hand display imitating an analog clock corresponding to the time information acquired by the time acquisition unit 52. Therefore, the displayed content changes with the passage of time, and the shape of the displayed content changes every hour and minute.
Further, the display content control unit 54 controls the display color, the brightness, and other parameters that control the brightness of the display content. For example, when the electronic device 1 is placed in an environment with low illuminance, the brightness of the displayed content is controlled to a low brightness according to the detected illuminance in order to prevent the displayed content from becoming excessively bright and difficult to see. do. On the other hand, when the electronic device 1 is placed in a dark environment, the reverse control, that is, the brightness of the displayed content is controlled to a high brightness corresponding to the detected illuminance. In the clock display in the present embodiment, the display content control unit 54 adjusts the brightness or display color of the hand display of the display content.

The sensor information acquisition unit 61 acquires detection values detected by various sensors such as the illuminance detected by the illuminance sensor. Since the illuminance sensor 29 has an isotropic shape, the detected illuminance, that is, the detection value acquired by the sensor information acquisition unit 61 is a value that does not depend on the incident direction of the incident light.

[Changes in display contents]
With reference to FIGS. 5A to 5C, changes in the display contents according to the time will be described. FIG. 5A is a diagram showing the details of FIG. 3A, and is a schematic diagram showing the first display content. The minute hand 71 and the hour hand 73, which are the display contents, are displayed in the light emitting area 68 of the first display unit 18 by the self-luminous emission of the OLED. In the first display content, the display color of the minute hand 71 and the hour hand 73 is, for example, gray.

As shown in FIG. 3B, the illuminance sensor 29 overlaps with the first display unit 18 in the viewing direction. This superposed portion is shown by a broken line in the light emitting region 68, and is referred to here as a superposed portion 70.

The first display content indicates the time at 5 o'clock by the minute hand 71 and the hour hand 73. The minute hand 71 and the hour hand 73 rotate around the rotation center O. The rotation center O coincides with the center of the illuminance sensor 29 (the center of the superposed portion 70). With the passage of time, the minute hand 71 rotates clockwise toward the paper surface with the rotation center O as the center of rotation, and the hour hand 73 also rotates clockwise toward the paper surface with the rotation center O as the center of rotation.

The overlapping portion 70 has a minute hand region 72 that overlaps with the minute hand 71 and an hour hand region 74 that overlaps with the hour hand 73. In the first display content, it is assumed that the total of the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 is 50% of the light emission amount of the entire minute hand 71 and the hour hand 73.
The illuminance sensor 29'is shown as a comparative example of the arrangement position of the illuminance sensor 29. The illuminance sensor 29'is provided in a region not including the rotation center O. In this case, it is assumed that the light emission amount of the minute hand 71 in the portion overlapping with the illuminance sensor 29'is 10% of the light emission amount of the entire minute hand 71 and the hour hand 73.

FIG. 5B is a schematic diagram showing the second display content. The second display content is a display content when a predetermined time has elapsed from the time of the first display content, and the minute hand 71 and the hour hand 73 indicate the time at 7:10. In the second display content, the total of the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 is unchanged from the first display content and is 50% of the light emission amount of the entire minute hand 71 and the hour hand 73. ..
In the comparative example, since the minute hand 71 is moved to a position where it does not overlap with the illuminance sensor 29'in the overlapped portion with the illuminance sensor 29', the amount of light emitted by the minute hand 71 in the overlapped portion is 0% of the total amount of light emitted. Is.

Comparing the first display content and the second display content, the total of the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 in the superimposed portion 70 is unchanged regardless of the passage of time.
On the other hand, when the illuminance sensor is in the position indicated by the illuminance sensor 29', that is, when the arrangement of the illuminance sensor 29'is deviated from the rotation center O, the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 The total changes over time.

As described above, depending on the positional relationship between the rotation center O and the illuminance sensor, the amount of light emitted from the displayed content in the overlapping portion between the light emitting region 68 and the illuminance sensor is either invariant or variable. In order to improve the accuracy of illuminance detection by the illuminance sensor, it is desirable that the amount of light emitted from the displayed content does not change. This is because when the amount of light emitted from the displayed content changes, the amount of change in the amount of light emitted from the displayed content is added to the amount of light incident on the illuminance sensor, and the amount of light incident on the illuminance sensor becomes different from the original amount. be.
Therefore, it is desirable that the displayed content is displayed at a position where the center of the illuminance sensor 29 coincides with the rotation center O of the minute hand 71 and the hour hand 73.

As described above, when the display content is the hand display of the clock, the display content control unit 54 determines the display position of the hand display based on the position of the illuminance sensor 29.
The display content control unit 54 detects the position of the illuminance sensor 29 by using, for example, an application recorded in the storage unit 14 in advance, and displays the hands of the clock at the position corresponding to the position of the illuminance sensor 29. That is, the display content control unit 54 displays the hands so that the center of the illuminance sensor 29 coincides with the positions of the rotation centers of the minute hand 71 and the hour hand 73. As a result, in the superimposed portion 70, the hands are displayed so that the total of the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 is kept constant regardless of the passage of time.

FIG. 5C is a schematic diagram showing a third display content. The third display content is a diagram showing an exception in which the total of the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 changes in the superimposed portion 70. In the third display content, the minute hand 71 and the hour hand 73 overlap each other to indicate the time at 4:22. In the third display content, the sum of the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 changes from the first display content due to the occurrence of the superimposed region D, and the light emission of the minute hand 71 and the entire hour hand 73. It is 30% of the amount.

As described above, it is desirable that the amount of light emitted from the displayed content in the superimposed portion 70 is unchanged. Therefore, when the superimposed region D occurs as in the third display content, the display content control unit 54 suppresses the change in the amount of light emitted. Control to do.
For example, the display content control unit 54 controls the luminance itself of the display content, or changes the display color of the superimposed region D instead. Here, the display content control unit 54 controls to increase the light emission amount to 50% by changing the display color from gray to white in order to suppress the change in the light emission amount. As a result, the amount of light emitted from the superimposed portion 70 is always kept constant.
As a result, the illuminance sensor 29 can detect the illuminance from the incident light that is not affected by the change in the amount of light emitted in the light emitting region.

Further, the time at which the superimposed region D occurs can be calculated in advance. Since the amount of change in light emission in the superposed area D can also be calculated in advance from the area of the superposed area D, etc., the data in which the time and the amount of change in light emission or the time and the correction value of the light emission amount are associated with each other can be stored in the luminance table 141. Record in advance. The display content control unit 54 controls the amount of light emitted from the display content based on the amount of change or the correction value shown in the luminance table 141.

[motion]
FIG. 6 is a flowchart illustrating a flow of luminance control processing executed by the electronic device 1 of FIG. 1 having the functional configuration of FIG.
The luminance control process starts when the user performs an operation to start the clock display through the touch panel 17 or the first input unit 19.

In step S1, the illuminance information acquisition unit 51 acquires the illuminance.
In step S2, the luminance control unit 53 determines whether or not the acquired illuminance is less than a predetermined value. If the illuminance is less than a predetermined value, the process proceeds to step S3.
In step S2, when the illuminance is equal to or higher than a predetermined value, the luminance control unit 53 determines that it is not necessary to control the luminance of the displayed content, and the process proceeds to step S8. When the illuminance is equal to or higher than a predetermined value, it is assumed that the amount of external light is large, and at this time, the influence of the amount of emitted light of the displayed content on the amount of external light is considered to be negligibly small. Therefore, the luminance control unit 53 proceeds to step S8 without controlling the amount of light emitted from the displayed content, and controls the luminance of the first display unit based on the acquired illuminance.

In step S3, the time acquisition unit 52 acquires the time detected by the RTC unit 15.
In step S4, the luminance control unit 53 refers to the luminance table 141 and selects the luminance values of the minute hand region 72 and the hour hand region 74 corresponding to the time acquired by the time acquisition unit 52.

In step S5, the luminance control unit 53 determines whether or not it is necessary to change the luminance of the current minute hand region 72 and / or the hour hand region 74 according to the selected luminance value.
For example, in the case of a time in which the superimposed region D exists as shown in FIG. 5C, the luminance control unit 53 determines that it is necessary to control the luminance of the minute hand region 72 and / or the hour hand region 74, and processes the luminance. Proceeds to step S6.

In step S6, the display content control unit 54 adjusts the brightness of the superimposed region D. In the display content control unit 54, in the superimposition portion 70, the light emission amount of the superimposition region D in FIG. 5C is the light emission amount of the minute hand region 72 and the light emission amount of the hour hand region 74 shown in the first display content and the second display content. The brightness is controlled so that it is the same as the sum of and. For example, in the light emitting region, the display color of the needle display is usually gray, but in the superimposed region D, the display color is changed to white, so that the brightness of the superimposed portion 70 is the same as when the superimposed region D does not exist. Adjusted to brightness.

As a result of the control in step S6, the brightness of the entire superimposed portion 70 is maintained at the same brightness as the time when the superimposed region D does not occur even at the time when the superimposed region D occurs. That is, the change in the amount of light emitted from the clock display is suppressed. Therefore, since the amount of external light incident on the illuminance sensor 29 is not affected by the change in the amount of light emitted from the clock display, the change in illuminance can be accurately detected. In other words, the illuminance detected by the illuminance sensor 29 is accurately detected regardless of the displayed content.
When the control of the display content control unit 54 is completed in step S6, the process proceeds to step S7. Alternatively, if it is determined in step S5 above that it is not necessary to control the brightness of the needle display, the process proceeds to step S7.

In step S7, the illuminance information acquisition unit acquires the illuminance detected by the illuminance sensor 29 via the sensor information acquisition unit 61.
Since the illuminance detected in step S7 is detected based on the external light incident through the superimposed portion 70 in which the brightness of the display content is adjusted, the accuracy is higher than in the case where the brightness of the display content is not adjusted. ..

In step S8, the brightness control unit 53 controls the brightness of the first display unit 18 based on the illuminance detected in step S1 or the illuminance detected in step S7.
In step S8, the brightness of the first display unit 18 is controlled based on the illuminance detected with high accuracy in step S7, and as a result, the brightness of the first display unit 18 is adjusted more appropriately. ..

In step S9, the display content control unit 54 determines whether or not the end condition is satisfied. The end condition is, for example, when the user performs an operation to end the clock display through the touch panel 17 or the first input unit 19. When the clock display is finished, the luminance control process is finished, and when the clock display is continued, the process returns to step S3 and is repeated.

The electronic device 1 configured as described above includes a first display unit 18, an illuminance sensor 29, and a display content control unit 54.
The illuminance sensor 29 is arranged on the back side of the display surface of the first display unit 18 and detects the illuminance.
When the illuminance detected by the illuminance sensor 29 is less than the predetermined illuminance, the display content control unit 54 displays the display content of the light emitting region in the overlapping portion 70 between the light emitting region of the first display unit 18 and the light receiving region of the illuminance sensor 29. The display content of the light emitting region is controlled so as to suppress the change in illuminance due to the change.
This makes it possible to realize an electronic device capable of detecting an appropriate illuminance regardless of the display content. By keeping the brightness of the displayed content constant, the illuminance sensor 29 can detect the illuminance from the amount of external light that is not affected by the change in the brightness of the emitted display content. As a result, the accuracy of the illuminance detected by the illuminance sensor 29 is improved, so that the brightness of the first display unit 18 whose light emission is controlled based on the illuminance is more appropriately maintained.

When the superimposed region D in which the minute hand region 72 and the hour hand region 74 of the light emitting region overlap is formed in the superimposed portion 70, the display content control unit 54 controls the display content of the light emitting region in the superimposed portion 70.
As a result, the display content of the light emitting region in the superimposed portion 70 is controlled, and as a result, the illuminance sensor 29 can be configured to detect the illuminance from the amount of external light that is not affected by the change in the brightness of the display content.

The display content control unit 54 changes the display color or brightness of the display content so as to suppress the change in illuminance due to the change in the display content in the light emitting region in the superimposed portion 70.
The display content control unit 54 controls the luminance itself of the display content, or changes the display color of the superimposed region D instead. The display content control unit 54 may perform control to suppress the change in illuminance due to the change in the display content by changing the display color in order to realize a predetermined brightness.

The display content control unit 54 increases the brightness of the display content when the amount of light emitted from the display content in the light emitting region in the superimposed portion 70 decreases (for example, when the minute hand region 72 and the hour hand region 74 overlap), and the superimposed portion 70. When the amount of light emitted from the displayed content in the light emitting region in the above is increased (for example, when the minute hand region 72 and the hour hand region 74 do not overlap), the brightness of the displayed content is reduced.
As a result, the brightness of the superimposed portion 70 can be kept constant at all times, and as a result, the illuminance sensor 29 can detect the illuminance from the amount of external light that is not affected by the change in the brightness of the displayed content.

The display content is a clock hand display, and the display content control unit 54 determines the display position of the hand display based on the position where the illuminance sensor 29 is arranged.
The display content control unit 54 detects, for example, the position of the illuminance sensor 29 and displays the hands of the clock at the position corresponding to the position of the illuminance sensor 29. As a result, the display content control unit 54 keeps the brightness of the display content corresponding to the position where the illuminance sensor is arranged constant. As a result, the illuminance sensor 29 can detect the illuminance from the amount of external light that is not affected by the change in the brightness of the displayed content.

The display content control unit 54 controls the display content so that the position of the rotation center O of the needle of the needle display overlaps with the light receiving region of the illuminance sensor 29.
For example, the display content control unit 54 displays the needle so that the center of the illuminance sensor 29 and the position of the rotation center of the needle coincide with each other. For example, when the illuminance sensor 29 is circular, the display content control unit 54 displays the needle so that the center of the circle of the illuminance sensor 29 coincides with the center of rotation of the needle. As a result, the display content control unit 54 can estimate in advance the area where the hands are displayed in the superimposed portion 70 for each time. The display content control unit 54 controls to keep the brightness of the display content constant based on the estimated position of the needle display, and as a result, the illuminance sensor 29 is affected by the change in the brightness of the display content. The illuminance can be detected from the amount of light that is not received.

When the illuminance detected by the illuminance sensor 29 is equal to or higher than the predetermined illuminance, the display content control unit 54 controls to maintain the display content of the light emitting region of the first display unit.
When the illuminance is equal to or higher than a predetermined value, it is assumed that the amount of external light is large. In such a case, it is considered that the influence of the amount of light emitted from the light emitting region of the first display unit 18 on the detected illuminance is small, and it is not necessary to control the display content of the light emitting region.
Thereby, the display contents can be appropriately controlled according to the detected illuminance.

The first display unit 18 has an organic light emitting layer containing a light emitting organic compound.
This makes it possible to reduce the size of the light emitting region of the electronic device 1.

[Modification example]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like to the extent that the object of the present invention can be achieved are included in the present invention.

As another embodiment, in adjusting the brightness of the display content, control of displaying in a color other than white may be performed. In the above-described embodiment, the display content control unit 54 changes the display color from the gray hand display in the normal state to white in the superimposed region D, but it does not necessarily have to be these colors. That is, the display color of the superimposed region D may be changed to a color that suppresses the change in the amount of light emitted in the light emitting region according to the display color in the normal state.

As another modification, the display content control unit 54 may control the brightness of the display content in real time. That is, in the above-described embodiment, the luminance of the displayed content is adjusted by referring to the luminance table 141 recorded in advance in the storage unit 14, but the luminance table 141 may not be held in advance. In this case, the display content control unit 54 may detect the overlap between the minute hand region 72 and the hour hand region 74 in real time, and may adjust the brightness of the superimposed region D when the superimposed region D occurs.

As another modification, in the above-described embodiment, the display content is an analog clock display, but a digital clock display may be used. In this case, even in the digital notation clock display, the brightness and display color of the display contents may be controlled so that the amount of light emitted in the time display area (numerical notation area) is kept constant.

As another modification, in the above-described embodiment, the illuminance sensor 29 has a substantially square rectangle as an example, but the illuminance sensor 29 may have another shape. For example, an illuminance sensor having a light receiving part having a shape that is invariant to a rotation of 180 degrees around the center of rotation O, such as a regular even square, an ellipse (including a circle), or a parallelogram (including a rectangle or a rhombus). Any illuminance sensor may be used as long as it is used.

As another modification, in the above-described embodiment, the clock display is displayed at the lower right side of the paper, but may be displayed at the center of the light emitting region 68. In this case, in order to achieve the effect of the present invention, the illuminance sensor 29 also needs to be arranged in the center of the light emitting region. As a matter of course, the rotation center O of the needle display is located at the center of the illuminance sensor 29.

As another modification, the display content control unit 54 may control the brightness of the display content by selecting an image. In the above-described embodiment, the display content control unit 54 controls to adjust the display content to the luminance according to the time by referring to the luminance table 141, but instead of referring to the luminance table 141 in step S4, the time is used. You may refer to "clock image data" according to. In the "clock image data", image data having brightness corresponding to each time is recorded so as to correspond to all the times. When the display content control unit 54 acquires the time from the time acquisition unit 52, the display content control unit 54 selects an image corresponding to the acquired time with reference to the "clock image data" and displays it as the display content. As a result, the brightness of the displayed content is kept constant.
When the "clock image data" is used, the processes of steps S5 to S6 are unnecessary, but the storage area for recording the "clock image data" is larger than that when the luminance table 141 is recorded. You will need it.
Further, when "clock image data" is used, the brightness of the displayed content is always kept constant, so that the illuminance is always detected accurately. Therefore, there is an advantage that the brightness of the first display unit 18 is always appropriately maintained no matter when the brightness of the first display unit 18 is adjusted in steps S7 to S8.

As another modification, the display content control unit 54 may control the brightness of the display content with reference to the brightness of the superimposed region D.
In the above-described embodiment, the display content control unit 54 controls the display content based on a state in which the minute hand region 72 and the hour hand region 74 do not overlap (a state in which the superimposed region D does not occur). That is, when the amount of light emitted from the displayed content in the light emitting region in the superimposed portion 70 is reduced, the display content control unit 54, for example, keeps the minute hand region 72 and the hour hand region 74 at the current brightness, and the minute hand region 72 and the hour hand region. Control is performed to increase the brightness of the displayed content when the state in which the 74 does not overlap with the state in which the 74 overlaps changes.
On the other hand, in this modification, the display content is controlled based on the state in which the minute hand region 72 and the hour hand region 74 overlap (a state in which the superimposed region D occurs). That is, when the amount of light emitted from the display content of the light emitting region in the superimposed portion 70 increases, for example, the area of the superimposed region D decreases with time while the minute hand region 72 and the hour hand region 74 maintain the current brightness. In this case, or when the superimposing area D disappears, the brightness of the display content may be reduced according to the area of the superimposing area D.
As a result, the brightness of the superimposed portion 70 can be kept constant regardless of the presence or absence of the superimposed region D, and as a result, the illuminance sensor 29 obtains the illuminance from the amount of external light that is not affected by the change in the brightness of the displayed content. Can be detected.

Further, in the above-described embodiment, the electronic device 1 is provided with the first display unit 18 and the second display unit 24, but the electronic device 1 is not limited to this and includes only the first display unit 18. You may.
Further, in the above-described embodiment, the first display unit 18 on which the display contents are displayed is composed of an OLED, but may be configured by another display device such as a liquid crystal display.
Further, in the above-described embodiment, the CPU 11 of the electronic device 1 is composed of the first CPU 11A and the second CPU 11B, but the CPU 11 is not limited to this, and the CPU 11 is a single CPU having both the functions of the first CPU 11A and the functions of the second CPU 11B. There may be.

Further, in the above-described embodiment, the clock display is a hand display imitating an analog clock corresponding to the time information acquired by the time acquisition unit 52. Then, the minute hand 71 and the hour hand 73 were displayed as clock displays. Not limited to this, other displays may be performed. For example, the display content control unit 54 may further display the second hand in addition to the minute hand 71 and the hour hand 73. Then, the display content control unit 54 may perform the above-mentioned control on the display of the minute hand 71 and the hour hand 73 on the second hand to be further displayed. Further, in this case, the display content control unit 54 may perform the same control as the control for the superposed area D on the superposed area of the minute hand 71 and the hour hand 73 and the second hand to be further displayed.

Further, in the above-described embodiment, the electronic device 1 to which the present invention is applied has been described by taking a digital camera wristwatch type device (smart watch or the like) as an example, but the present invention is not particularly limited thereto.
For example, the present invention can be generally applied to electronic devices having a luminance adjusting function. Specifically, for example, the present invention can be applied to a notebook personal computer, a printer, a television receiver, a video camera, a portable navigation device, a mobile phone, a smartphone, a portable game machine, and the like.

The series of processes described above can be executed by hardware or software.
In other words, the functional configuration of FIG. 4 is merely an example and is not particularly limited. That is, it suffices if the electronic device 1 is provided with a function capable of executing the above-mentioned series of processes as a whole, and what kind of functional block is used to realize this function is not particularly limited to the example of FIG.
Further, one functional block may be configured by a single piece of hardware, a single piece of software, or a combination thereof.
The functional configuration in the present embodiment is realized by a processor that executes arithmetic processing, and the processor that can be used in the present embodiment is composed of various processing devices such as a single processor, a multiprocessor, and a multicore processor. In addition to the above, the present invention includes a combination of these various processing devices and a processing circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field-Programmable Gate Array).

When a series of processes are executed by software, a program constituting the software is installed in a computer or the like from a network or a recording medium.
The computer may be a computer embedded in dedicated hardware. Further, the computer may be a computer capable of executing various functions by installing various programs, for example, a general-purpose personal computer.

The recording medium including such a program is not only composed of the removable media 41 of FIG. 2 distributed separately from the main body of the device in order to provide the program to the user, but also is preliminarily incorporated in the main body of the device of the user. It is composed of a recording medium or the like provided in. The removable media 41 is composed of, for example, a magnetic disk (including a floppy disk), an optical disk, a magneto-optical disk, or the like. The optical disc is composed of, for example, a CD-ROM (Compact Disk-Read Only Memory), a DVD (Digital Versaille Disc), a Blu-ray (registered trademark) Disc (Blu-ray disc), or the like. The magneto-optical disk is composed of MD (Mini-Disc) or the like. Further, the recording medium provided to the user in a state of being preliminarily incorporated in the apparatus main body is composed of, for example, the ROM 12 of FIG. 2 in which the program is recorded, the semiconductor memory included in the storage unit 14 of FIG. 2, and the like. ..

In this specification, the steps for describing a program to be recorded on a recording medium are not only processed in chronological order but also in parallel or individually, even if they are not necessarily processed in chronological order. It also includes the processing to be executed.
For example, the processing of steps S1 and S2 may be omitted. In this case, the brightness control unit 53 adjusts the brightness of the displayed content regardless of the amount of external light. By controlling the brightness regardless of the amount of external light, the processing speed in the luminance control unit 53 is improved as compared with the above-described embodiment.

Although some embodiments of the present invention have been described above, these embodiments are merely examples and do not limit the technical scope of the present invention. The present invention can take various other embodiments, and further, various modifications such as omission and substitution can be made without departing from the gist of the present invention. These embodiments and variations thereof are included in the scope and gist of the invention described in the present specification and the like, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

The inventions described in the claims at the time of filing the application of the present application are described below.
[Appendix 1]
Display means and
An illuminance detecting means arranged on the back side of the display surface of the display means to detect the illuminance, and an illuminance detecting means.
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the change in the illuminance due to the change in the display content of the light emitting area in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means is detected. An electronic device comprising: a control means for controlling the display content of the illuminance region so as to suppress the illuminance region.
[Appendix 2]
When a superposed region in which the first display content and the second display content of the light emitting region are superposed is formed in the superposed portion, the control means controls the display content of the light emitting region in the superposed portion. The electronic device according to Appendix 1, characterized by the above.
[Appendix 3]
The present invention is described in Appendix 1 or 2, wherein the control means changes the display color or the brightness of the display content so as to suppress the change in the illuminance due to the change in the display content of the light emitting region in the superposed portion. Electronic equipment.
[Appendix 4]
The control means is
When the amount of light emitted from the displayed content in the light emitting region in the superimposed portion decreases, the brightness of the displayed content is increased.
The electronic device according to Appendix 3, wherein when the amount of light emitted from the displayed content in the light emitting region in the superimposed portion increases, the brightness of the displayed content is reduced.
[Appendix 5]
The display content is a clock hand display.
The electronic device according to any one of Supplementary note 1 to 4, wherein the control means determines a display position of the needle display based on a position where the illuminance detecting means is arranged.
[Appendix 6]
The electronic device according to Appendix 5, wherein the control means controls the display content so that the position of the rotation center of the needle of the needle display overlaps with the light receiving region of the illuminance detecting means.
[Appendix 7]
The electronic device according to any one of Supplementary note 1 to 6, wherein when the illuminance detected by the illuminance detecting means is equal to or higher than a predetermined illuminance, the brightness of the display content of the light emitting region of the display means is maintained. ..
[Appendix 8]
The electronic device according to any one of Supplementary note 1 to 6, wherein the display means has an organic light emitting layer containing a light emitting organic compound.
[Appendix 9]
Display means and
A luminance control method for an electronic device, which is arranged on the back side of the display surface of the display means and includes an illuminance detecting means for detecting illuminance.
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the change in the illuminance due to the change in the display content of the light emitting area in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means is detected. An illuminance control method comprising a control step for suppressing.
[Appendix 10]
Display means and
An electronic device provided with an illuminance detecting means for detecting illuminance, which is arranged on the back side of the display surface of the display means.
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the change in the illuminance due to the change in the display content of the light emitting area in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means is detected. An illuminance control program characterized by suppressing control functions and realizing.

1 ... Electronic device, 11 ... CPU, 11A ... 1st CPU, 11B ... 2nd CPU, 12 ... ROM, 13 ... RAM, 14 ... Storage unit, 15 ... RTC section, 16 ... drive, 17 ... touch panel, 18 ... first display section, 19 ... first input section, 20 ... bluetooth antenna, 21 ... bluetooth module, 22 ... ... wireless LAN antenna, 23 ... wireless LAN module, 24 ... second display unit, 25 ... pulse sensor, 26 ... geomagnetic sensor, 27 ... acceleration sensor, 28 ... gyro sensor , 29 ... Illuminance sensor, 29'... Illuminance sensor, 30 ... Second input unit, 31 ... GPS antenna, 32 ... GPS module, 41 ... Removable media, CG ... Cover glass, BS ... black sheet, MB ... main board, H ... through hole, 51 ... illuminance information acquisition unit, 52 ... time acquisition unit, 53 ... brightness control unit, 54 ... Display content control unit, 61 ... Sensor information acquisition unit, 68 ... Illuminance area, 70 ... Superimposition part, Minute hand ... 71, Minute hand area ... 72, Hour hand ... 73, Hour hand area: 74, 141: Brightness table, D: Superimposed area, O: Center of rotation

Claims (10)

Display means and
An illuminance detecting means arranged on the back side of the display surface of the display means to detect the illuminance, and an illuminance detecting means.
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the change in the illuminance due to the change in the display content of the light emitting area in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means is detected. An electronic device comprising: a control means for controlling the display content of the illuminance region so as to suppress the illuminance region. When a superposed region in which the first display content and the second display content of the light emitting region are superposed is formed in the superposed portion, the control means controls the display content of the light emitting region in the superposed portion. The electronic device according to claim 1. The control means according to claim 1 or 2, wherein the control means changes the display color or the brightness of the display content so as to suppress the change in the illuminance due to the change in the display content of the light emitting region in the superimposed portion. The listed electronic device. The control means is
When the amount of light emitted from the displayed content in the light emitting region in the superimposed portion decreases, the brightness of the displayed content is increased.
The electronic device according to claim 3, wherein when the amount of light emitted from the displayed content in the light emitting region in the superimposed portion increases, the brightness of the displayed content is reduced. The display content is a clock hand display.
The electronic device according to any one of claims 1 to 4, wherein the control means determines a display position of the needle display based on a position where the illuminance detecting means is arranged. The electronic device according to claim 5, wherein the control means controls the display content so that the position of the rotation center of the needle of the needle display overlaps with the light receiving region of the illuminance detecting means. The invention according to any one of claims 1 to 6, wherein when the illuminance detected by the illuminance detecting means is equal to or higher than a predetermined illuminance, the brightness of the display content of the light emitting region of the display means is maintained. Electronics. The electronic device according to any one of claims 1 to 6, wherein the display means has an organic light emitting layer containing a luminescent organic compound. Display means and
A luminance control method for an electronic device, which is arranged on the back side of the display surface of the display means and includes an illuminance detecting means for detecting illuminance.
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the change in the illuminance due to the change in the display content of the light emitting area in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means is detected. An illuminance control method comprising a control step for suppressing. Display means and
An electronic device provided with an illuminance detecting means for detecting illuminance, which is arranged on the back side of the display surface of the display means.
When the illuminance detected by the illuminance detecting means is less than a predetermined illuminance, the change in the illuminance due to the change in the display content of the light emitting area in the overlapping portion between the light emitting region of the display means and the light receiving region of the illuminance detecting means is detected. An illuminance control program characterized by suppressing control functions and realizing.

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