JP2021018355A - Control unit, method, program, and information processing system - Google Patents

Abstract

To control a backlight according to the remaining amount of a battery.SOLUTION: A control unit comprises: a position information acquisition unit that acquires position information on a contact point of input means and a screen of a display unit; a battery remaining amount information acquisition unit that acquires battery remaining amount information on the display unit; and an illuminance control unit that increases the luminance of a backlight around the contact point and decreases the luminance of the backlight in an area other than around the contact point, and controls the area around the contact point based on the battery remaining amount information.SELECTED DRAWING: Figure 5

Description

The present invention relates to control devices, methods, programs, and information processing systems.

Conventionally, a touch panel has been used in an interactive whiteboard (also called an electronic blackboard) or the like. In the interactive whiteboard, the material can be enlarged and displayed by touching the touch panel with a finger, and the material can be easily written with a pen.

Regarding the control of the backlight of the touch panel, Patent Document 1 describes that the desired range can be easily set as the lighting range only by the user touching the desired one or two points of the touch panel (). Paragraph [0033] of Patent Document 1).

However, when the touch panel operates on a battery, the backlight in the same range is turned on in Patent Document 1 regardless of whether the remaining battery level is sufficient or the battery level is low. Therefore, in Patent Document 1, it is not possible to effectively control the lighting / extinguishing of the backlight according to the remaining battery level.

Therefore, in one embodiment of the present invention, it is an object to control the backlight according to the remaining amount of the battery.

In order to achieve the above object, one embodiment of the present invention includes a position information acquisition unit that acquires position information of a contact point between an input means and a screen of a display device, and a battery that acquires battery remaining amount information of the display device. The brightness of the remaining amount information acquisition unit and the backlight around the contact point is increased and the brightness of the backlight other than the vicinity of the contact point is decreased, and the area around the contact point is determined based on the battery remaining amount information. It is provided with an illuminance control unit for controlling.

According to one embodiment of the present invention, the backlight can be controlled according to the remaining amount of the battery.

It is a block diagram of the information processing system which concerns on one Embodiment of this invention. It is a hardware block diagram of the electronic blackboard which concerns on one Embodiment of this invention. It is a hardware block diagram of the video conferencing terminal which concerns on one Embodiment of this invention. It is a hardware block diagram of the smartphone which concerns on one Embodiment of this invention. It is a functional block diagram of the information processing system which concerns on one Embodiment of this invention. It is a figure for demonstrating the timing which enables the illuminance control which concerns on one Embodiment of this invention. It is a figure for demonstrating the outline which concerns on one Embodiment of this invention. It is a figure for demonstrating the range which raises brightness which concerns on one Embodiment of this invention. It is a flowchart of the illuminance control process which concerns on one Embodiment of this invention.

Hereinafter, each embodiment will be described with reference to the accompanying drawings. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.

<System configuration>
FIG. 1 is a configuration diagram of an information processing system 10 according to an embodiment of the present invention. As shown in FIG. 1, the information processing system 10 includes a control device 11 and a display device 12. The control device 11 and the display device 12 may be mounted in separate housings as shown in FIG. 1, or may be mounted in one housing. Each will be described below.

The display device 12 is a liquid crystal display having a touch panel function.

The control device 11 controls the illuminance of the display device 12. Specifically, the control device 11 is based on the position information (for example, coordinate information, hereinafter also referred to as position information) of the contact point between the input means (pen, finger, etc.) and the touch panel, and the control device 11 is based on the input means (pen, finger, etc.). The light intensity of the backlight around the contact point between the touch panel and the touch panel is increased, and the light intensity of other backlights is decreased.

At that time, the control device 11 narrows or widens the area for increasing the brightness of the backlight of the display device 12 based on the information on the remaining battery level of the display device 12 (hereinafter, also referred to as the remaining battery level information). Can be done. Further, the control device 11 can reduce or increase the brightness of the backlight around the contact point between the input means (pen, finger, etc.) and the touch panel based on the battery remaining amount information.

The information processing system 10 includes, for example, an output device such as a PJ (Projector: projector), an IWB (Interactive White Board: a white board having an electronic whiteboard function capable of intercommunication), a digital signage, and a HUD (Head Up Display). ) Devices, industrial machines, imaging devices, sound collectors, medical devices, network home appliances, automobiles (Connected Cars), notebook PCs (Personal Computers), mobile phones, smartphones, tablet terminals, game machines, PDA (Personal Digital Assistant), It may be a digital camera, a wearable PC, a desktop PC, or the like.

<Hardware configuration>
<< Electronic Blackboard >>
FIG. 2 is a hardware configuration diagram of an electronic blackboard which is an example of the information processing system 10. As shown in FIG. 2, the electronic whiteboard 2 includes a CPU (Central Processing Unit) 201, a ROM (Read Only Memory) 202, a RAM (Random Access Memory) 203, an SSD (Solid State Drive) 204, and a network I / It includes an F205 and an external device connection I / F (Interface) 206.

Of these, the CPU 201 controls the operation of the entire electronic blackboard 2. The ROM 202 stores programs used for the operation of the CPU 201 such as the CPU 201 and the IPL (Initial Program Loader). The RAM 203 is used as a work area of the CPU 201. The SSD 204 stores various data such as a program for an electronic blackboard. The network I / F 205 controls communication with the communication network 100. The external device connection I / F 206 is an interface for connecting various external devices. The external device in this case is, for example, a USB (Universal Serial Bus) memory 230 and an external device (microphone 240, speaker 250, camera 260).

Further, the electronic blackboard 2 includes a capture device 211, a GPU 212, a display controller 213, a contact sensor 214, a sensor controller 215, an electronic pen controller 216, a short-range communication circuit 219, an antenna 219a of the short-range communication circuit 219, a power switch 222, and the like. It is provided with selection switches 223.

Of these, the capture device 211 causes the video information corresponding to the display contents of the external PC (Personal Computer) 270 to be displayed on the display surface as a still image or a moving image. The GPU (Graphics Processing Unit) 212 is a semiconductor chip that specializes in graphics. The display controller 213 controls and manages the screen display in order to output the output image from the GPU 212 to the display 280 or the like. The contact sensor 214 detects that the electronic pen 290, the user's hand H, or the like has come into contact with the display 280. The sensor controller 215 controls the processing of the contact sensor 214. The contact sensor 214 inputs and detects the coordinates by the infrared blocking method. In the method of inputting the coordinates and detecting the coordinates, two light receiving and emitting devices installed at both upper ends of the display 280 radiate a plurality of infrared rays in parallel with the display 280 and are provided around the display 280. This is a method of receiving light that is reflected by a reflecting member and returns on the same optical path as the light path emitted by the light receiving element. The contact sensor 214 outputs an infrared ID emitted by two light emitting / receiving devices blocked by the object to the sensor controller 215, and the sensor controller 215 specifies a coordinate position which is a contact position of the object. The electronic pen controller 216 determines whether or not there is a touch of the pen tip or a touch of the pen tail on the display 280 by communicating with the electronic pen 290. The short-range communication circuit 219 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark). The power switch 222 is a switch for switching the power ON / OFF of the electronic blackboard 2. The selection switches 223 are, for example, a group of switches for adjusting the brightness and color tone of the display of the display 280.

Further, the electronic blackboard 2 is provided with a bus line 210. The bus line 210 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 201 shown in FIG.

The contact sensor 214 is not limited to the infrared blocking method, but is a capacitive touch panel that specifies a contact position by detecting a change in capacitance, and a contact position is specified by a voltage change between two opposing resistance films. Various detection means such as a resistance film type touch panel and an electromagnetic induction type touch panel that detects the electromagnetic induction generated by the contact object coming into contact with the display unit and specifies the contact position may be used. Further, the electronic pen controller 216 may determine whether or not there is a touch not only on the pen tip and pen end of the electronic pen 290 but also on the portion gripped by the user of the electronic pen 290 and other electronic pen portions.

<< Video conferencing terminal >>
FIG. 3 is a hardware configuration diagram of the video conferencing terminal. As shown in FIG. 3, the video conferencing terminal 3 includes a CPU 301, a ROM 302, a RAM 303, a flash memory 304, an SSD 305, a media I / F 307, an operation button 308, a power switch 309, a bus line 310, and a network I / F 311. Camera 312, image pickup element I / F 313, microphone 314, speaker 315, sound input / output I / F 316, display I / F 317, external device connection I / F (Interface) 318, short-range communication circuit 319, short-range communication circuit 319. It is equipped with an antenna 319a. Of these, the CPU 301 controls the operation of the entire video conferencing terminal 3. The ROM 302 stores a program used for operating the CPU 301 such as an IPL. The RAM 303 is used as a work area of the CPU 301. The flash memory 304 stores various data such as a communication program, image data, and sound data. The SSD 305 controls reading or writing of various data to the flash memory 304 according to the control of the CPU 301. An HDD may be used instead of the SSD. The media I / F 307 controls reading or writing (storage) of data to the recording medium 306 such as a flash memory. The operation button 308 is a button that is operated when selecting a destination of the video conferencing terminal 3. The power switch 309 is a switch for switching the power ON / OFF of the video conferencing terminal 3.

Further, the network I / F311 is an interface for data communication using a communication network such as the Internet. The CMOS (Complementary Metal Oxide Semiconductor) sensor 312 is a kind of built-in imaging means for capturing an image of a subject and obtaining image data under the control of the CPU 301. Instead of a CMOS sensor, it may be an imaging means such as a CCD (Charge Coupled Device) sensor. The image sensor I / F 313 is a circuit that controls the operation of the CMOS sensor 312. The microphone 314 is a built-in circuit that converts sound into an electric signal. The speaker 315 is a built-in circuit that converts an electric signal into physical vibration to produce sounds such as music and voice. The sound input / output I / F 316 is a circuit that processes sound signal input / output between the microphone 314 and the speaker 315 under the control of the CPU 301. The display I / F 317 is a circuit that transmits image data to an external display under the control of the CPU 301. The external device connection I / F 318 is an interface for connecting various external devices. The short-range communication circuit 319 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark).

Further, the bus line 310 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 301 shown in FIG.

The display is a kind of display means composed of a liquid crystal, an organic EL (Electro Luminescence), or the like for displaying an image of a subject, an operation icon, or the like. The display is also connected to the display I / F 317 by a cable. This cable may be a cable for analog RGB (VGA) signals, a cable for component video, HDMI (High-Definition Multimedia Interface) (registered trademark), or DVI (Digital Video Interactive). ) It may be a signal cable.

The CMOS (Complementary Metal Oxide Semiconductor) sensor 312 is a kind of built-in imaging means for capturing an image of a subject and obtaining image data under the control of the CPU 301. Instead of a CMOS sensor, it may be an imaging means such as a CCD (Charge Coupled Device) sensor. External devices such as an external camera, an external microphone, and an external speaker can be connected to the external device connection I / F318 by a USB cable or the like. When an external camera is connected, the external camera operates in preference to the built-in CMOS sensor 312 according to the control of the CPU 301. Similarly, when an external microphone is connected or an external speaker is connected, the external microphone and the external speaker are given priority over the built-in microphone 314 and the built-in speaker 315 according to the control of the CPU 301. The external speaker works.

Further, the recording medium 306 has a structure that can be attached to and detached from the video conferencing terminal 3. Further, as long as it is a non-volatile memory that reads or writes data under the control of the CPU 301, not only the flash memory 304 but also an EEPROM or the like may be used.

<< Smartphone >>
FIG. 4 is a hardware configuration diagram of a smartphone, which is an example of the information processing system 10. As shown in FIG. 4, the smartphone 4 includes a CPU 401, a ROM 402, a RAM 403, an EEPROM 404, a CMOS sensor 405, an image sensor I / F 406, an acceleration / orientation sensor 407, a media I / F 409, and a GPS receiver 411. There is.

Of these, the CPU 401 controls the operation of the entire smartphone 4. The ROM 402 stores programs used for operating the CPU 401 such as the CPU 401 and the IPL. The RAM 403 is used as a work area for the CPU 401. The EEPROM 404 reads or writes various data such as a smartphone program under the control of the CPU 401. The CMOS (Complementary Metal Oxide Semiconductor) sensor 405 is a kind of built-in imaging means for acquiring image data by imaging a subject (mainly a self-portrait) under the control of the CPU 401. Instead of a CMOS sensor, it may be an imaging means such as a CCD (Charge Coupled Device) sensor. The image sensor I / F 406 is a circuit that controls the operation of the CMOS sensor 405. The acceleration / orientation sensor 407 is a variety of sensors such as an electronic magnetic compass, a gyro compass, and an acceleration sensor that detect the geomagnetism. The media I / F 409 controls reading or writing (storage) of data to a recording medium 408 such as a flash memory. The GPS receiving unit 411 receives GPS signals from GPS satellites.

In addition, the smartphone 4 includes a long-distance communication circuit 412, a CMOS sensor 413, an image sensor I / F 414, a microphone 415, a speaker 416, a sound input / output I / F 417, a display 418, an external device connection I / F (Interface) 419, and near. It includes a range communication circuit 420, an antenna 420a of the short range communication circuit 420, and a touch panel 421.

Of these, the telecommunications circuit 412 is a circuit that communicates with other devices via the communication network 100. The CMOS sensor 413 is a kind of built-in imaging means for capturing an image of a subject and obtaining image data under the control of the CPU 401. The image sensor I / F 414 is a circuit that controls the operation of the CMOS sensor 413. The microphone 415 is a built-in circuit that converts sound into an electric signal. The speaker 416 is a built-in circuit that converts an electric signal into physical vibration to produce sounds such as music and voice. The sound input / output I / F 417 is a circuit that processes sound signal input / output between the microphone 415 and the speaker 416 under the control of the CPU 401. The display 418 is a kind of display means such as a liquid crystal or an organic EL (Electro Luminescence) for displaying an image of a subject, various icons, and the like. The external device connection I / F419 is an interface for connecting various external devices. The short-range communication circuit 420 is a communication circuit such as NFC (Near Field Communication) or Bluetooth (registered trademark). The touch panel 421 is a kind of input means for operating the smartphone 4 by the user pressing the display 418.

Further, the smartphone 4 is provided with a bus line 410. The bus line 410 is an address bus, a data bus, or the like for electrically connecting each component such as the CPU 401 shown in FIG.

<Functional block>
FIG. 5 is a functional block diagram of the information processing system 10 according to the embodiment of the present invention. As shown in FIG. 5, the information processing system 10 can include a main controller unit 110, a display unit 120, a touch sensor unit 130, a battery unit 140, and a pen unit 150. Each will be described below.

The display device 12 of the information processing system 10 has the functions of the display unit 120, the touch sensor unit 130, and the battery unit 140.

The control device 11 of the information processing system 10 has the function of the main controller unit 110. Further, the control device 11 of the information processing system 10 functions as the main controller unit 110 by executing the program.

The display unit 120 displays a video signal of a still image or a moving image output from a computer or the like. The backlight 121 illuminates the liquid crystal from the back of the liquid crystal display. The area and brightness of the backlight 121 emitting light are controlled by the main controller unit 110.

The touch sensor unit 130 detects the position on the screen of the touch panel touched by the input means (pen, finger, etc.).

Specifically, the touch panel controller 131 controls the touch panel. Further, the touch panel driver 132 supplies electric power to the touch panel to operate the touch panel driver 132. Further, the touch sensor 133 detects contact with the touch panel by the input means (pen, finger, etc.).

The battery unit 140 supplies power to the touch panel. The battery 141 provides electric power, and the battery controller 142 controls the battery unit 140.

The pen unit 150 has a function of a stylus pen for writing on a touch panel. The battery 151 provides power, and the pen controller 152 controls the pen unit 150.

The main controller unit 110 controls the illuminance of the display device 12 based on the position information and the battery remaining amount information. The main controller unit 110 includes a position information acquisition unit 111, a battery remaining amount information acquisition unit 112, and an illuminance control unit 113.

The position information acquisition unit 111 acquires position information (position information) on the screen of the touch panel touched by the input means (pen, finger, etc.) from the touch sensor unit 130.

The battery remaining amount information acquisition unit 112 acquires the remaining amount information (battery remaining amount information) of the battery 141 from the battery unit 140.

The illuminance control unit 113 controls the illuminance of the display device 12 based on the position information acquired by the position information acquisition unit 111 and the battery remaining amount information acquired by the battery remaining amount information acquisition unit 112. Hereinafter, the control of the illuminance of the display device 12 will be described with reference to FIGS. 6 to 8.

FIG. 6 is a diagram for explaining the timing for enabling the illuminance control according to the embodiment of the present invention. There are two types of power sources for operating the display device 12, an AC adapter and a battery.

When the display device 12 operates with the AC adapter, the remaining battery level does not become zero, so the illuminance control unit 113 disables the illuminance control function (in the case of the upper side of FIG. 6).

When the display device 12 operates on a battery, the illuminance control unit 113 can automatically switch between enabling and disabling the illuminance control function according to the remaining amount of the battery (in the case of the lower side of FIG. 6). Specifically, when the remaining battery level is high (when the remaining battery level is equal to or higher than the threshold value), the illuminance control unit 113 disables the illuminance control function as in the case of operating with the AC adapter. .. Further, the illuminance control unit 113 activates the illuminance control function when the remaining battery level is low (when the remaining battery level falls below the threshold value).

FIG. 7 is a diagram for explaining an outline according to an embodiment of the present invention. The coordinates of characters, figures, etc. written by the pen unit 150 are detected by the touch sensor unit 130. Characters, figures, and the like are displayed when the light emitted by the backlight (light source) 121 passes through the display unit (liquid crystal) 120.

The illuminance control unit 113 comes into contact with the input means (pen, finger, etc.) based on the position information (that is, position information) written by the input means (pen, finger, etc.) detected by the touch sensor unit 130. Control is performed to increase the light intensity of the backlight 121 around the position and decrease the light intensity of the other backlight 121. Therefore, the visibility of characters can be maintained while reducing the power consumption.

The upper part of FIG. 7 is when the battery level is high (for example, 100%). In this case, it is assumed that the brightness of all the backlights 121 is 100.

The center of FIG. 7 is when the battery is low (eg, 50 percent). In this case, the illuminance control unit 113 reduces the brightness of all the backlights 121 to 50 without writing.

The lower part of FIG. 7 is when the battery level is low (for example, 50%). In this case, the illuminance control unit 113 reduces the brightness of the backlight 121 other than the periphery of the position where the input means (pen, finger, etc.) is in contact to 50 when there is writing, but the input means (pen, finger, etc.) The brightness of the backlight 121 around the position where) is in contact is set to 100.

The illuminance control unit 113 controls the area of the range for increasing the brightness (that is, the periphery of the position where the above input means (pen, finger, etc.) is in contact) according to the remaining amount of the battery. Therefore, the power consumption can be suppressed and the operating time of the display device 12 can be extended. Hereinafter, a detailed description will be given with reference to FIG.

FIG. 8 is a diagram for explaining a range for increasing the brightness according to the embodiment of the present invention.

<< Area >>
The illuminance control unit 113 determines the brightness of the backlight 121 when the remaining battery level becomes low and the remaining battery level falls below a predetermined threshold value (threshold value for narrowing the range for increasing the brightness of the backlight 121 of the touch panel). Narrow the range to raise. The illuminance control unit 113 can reduce the area of the backlight 121 to increase the brightness as the remaining battery level decreases.

Further, the illuminance control unit 113 determines the brightness of the backlight 121 when the battery is charged and the remaining amount of the battery exceeds a predetermined threshold value (a threshold value for expanding the range for increasing the brightness of the backlight 121 of the touch panel). Increase the range to raise (for example, return to the original range before narrowing). The illuminance control unit 113 can increase the area of the range for increasing the brightness of the backlight 121 as the remaining battery level increases.

In FIG. 8, the shape of the illuminated area is circular, but it may be any shape such as an ellipse, a square, or a rectangle.

<< Brightness >>
The illuminance control unit 113 controls the area around the position where the input means (pen, finger, etc.) is in contact, and in addition, the backlight around the position where the input means (pen, finger, etc.) is in contact. The brightness of the light 121 can also be controlled. Specifically, the illuminance control unit 113 further lowers the brightness of the backlight 121 around the position where the input means (pen, finger, etc.) is in contact with the battery as the remaining amount is low. Further, the illuminance control unit 113 raises the brightness of the backlight 121 around the position where the input means (pen, finger, etc.) is in contact as the remaining battery level increases.

FIG. 9 is a flowchart of the illuminance control process according to the embodiment of the present invention. The illuminance control unit 113 is based on the position information of the contact point between the input means (pen, finger, etc.) and the touch panel, and the light of the backlight around the contact point between the input means (pen, finger, etc.) and the touch panel. It is assumed that the control is performed to increase the intensity and decrease the light intensity of other backlights.

It is assumed that the display device 12 is activated in step 1 (S1).

In step 2 (S2), the illuminance control unit 113 determines whether or not the display device 12 is operated by the battery. If the display device 12 is operating on the battery, the process proceeds to step 3, and if the display device 12 is not operating on the battery (that is, operating on the AC adapter), step 2 is executed again.

In step 3 (S3), the illuminance control unit 113 determines that the remaining battery level is higher than the threshold value (threshold value for narrowing the range for increasing the brightness of the backlight 121) based on the battery level information acquired from the display device 12. Judge whether it is small or not. If it is smaller than the threshold value, the process proceeds to step 4, and if it is greater than or equal to the threshold value, the process proceeds to step 5.

In step 4 (S4), the illuminance control unit 113 is touched by a range (that is, an input means (pen, finger, etc.)) for increasing the brightness of the backlight 121 based on the position information acquired from the display device 12. Reduce the area (around the position on the screen).

In step 5 (S5), the illuminance control unit 113 exceeds the threshold value (threshold value for expanding the range for increasing the brightness of the backlight 121) based on the battery remaining amount information acquired from the display device 12. Judge whether or not. If it exceeds, the process proceeds to step 6, and if it does not exceed, the process proceeds to step 7.

In step 6 (S6), the illuminance control unit 113 is a touch panel touched by a range for increasing the brightness of the backlight 121 (that is, an input means (pen, finger, etc.)) based on the position information acquired from the display device 12. Increase the area (around the position on the screen).

In step 7 (S7), the illuminance control unit 113 determines whether or not the display device 12 has been terminated. If it is terminated, the process is terminated, and if it is not terminated, the process returns to S3.

As described above, in one embodiment of the present invention, even if the brightness of the backlight of the touch panel is reduced, when the user writes with a pen or the like, the visibility of the characters can be improved and the writing can be facilitated. Since the range for increasing the brightness of the backlight of the touch panel is controlled to be wide or narrow according to the remaining battery level, it is possible to improve the visibility around the writing position while extending the operating time of the battery.

That is, usability (ease of writing) is improved by increasing the illuminance at the position touched by the user, but when the remaining battery level becomes low and falls below a predetermined threshold value, the brightness of the backlight of the touch panel is increased. By controlling so as to narrow the area to be raised, power consumption is suppressed and the operating time of the touch panel is extended. Further, when the battery is charged and exceeds a predetermined threshold value, a certain degree of usability can be ensured by controlling so as to increase the area for increasing the brightness of the backlight of the touch panel.

Each function of the embodiment described above can be realized by one or more processing circuits. Here, the "processing circuit" in the present specification is a processor programmed to execute each function by software such as a processor implemented by an electronic circuit, or a processor designed to execute each function described above. It shall include devices such as ASIC (Application Specific Integrated Circuit), DSP (digital signal processor), FPGA (field programmable gate array) and conventional circuit modules.

The present invention is not limited to the configurations shown here, such as combinations with other elements in the configurations and the like described in the above embodiments. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form thereof.

10 Information processing system 11 Control device 12 Display device 110 Main controller unit 111 Position information acquisition unit 112 Battery level information acquisition unit 113 Illumination control unit 120 Display unit 121 Backlight 130 Touch sensor unit 131 Touch panel controller 132 Touch panel driver 133 Touch sensor 140 Battery section 141 Battery 142 Battery controller 150 Pen section 151 Battery 152 Pen controller

Japanese Unexamined Patent Publication No. 2012-181412

Claims (9)

A position information acquisition unit that acquires position information of the contact point between the input means and the screen of the display device,
The battery level information acquisition unit that acquires the battery level information of the display device,
An illuminance control unit that increases the brightness of the backlight around the contact point and lowers the brightness of the backlight other than the vicinity of the contact point, and controls the area around the contact point based on the remaining battery information. Control device equipped with. The control device according to claim 1, wherein the illuminance control unit reduces the area around the contact point as the remaining battery level of the display device decreases. The control device according to claim 1 or 2, wherein the illuminance control unit increases the area around the contact point as the battery level of the display device increases. The control device according to any one of claims 1 to 3, wherein the illuminance control unit lowers the brightness of the back ride around the contact point as the remaining battery level of the display device decreases. The control device according to any one of claims 1 to 4, wherein the illuminance control unit increases the brightness of the backlight around the contact point as the battery level of the display device increases. The illuminance control unit determines whether or not the display device is operated by the battery, and if the display device is operated by the battery, controls the area around the contact point, according to claim 1. The control device according to any one of 5. Steps to acquire the position information of the contact point between the input means and the screen of the display device,
The step of acquiring the battery level information of the display device and
The step includes increasing the brightness of the backlight around the contact point and decreasing the brightness of the backlight other than the periphery of the contact point, and controlling the area around the contact point based on the battery remaining amount information. Method. Control device,
Position information acquisition unit that acquires the position information of the contact point between the input means and the screen of the display device,
Battery level information acquisition unit that acquires battery level information of the display device,
As an illuminance control unit that increases the brightness of the backlight around the contact point and lowers the brightness of the backlight other than the periphery of the contact point, and controls the area around the contact point based on the remaining battery information. A program to make it work. Including control device and display device
A position information acquisition unit that acquires position information of a contact point between the input means and the screen of the display device, and
The battery level information acquisition unit that acquires the battery level information of the display device,
An illuminance control unit that increases the brightness of the backlight around the contact point and lowers the brightness of the backlight other than the vicinity of the contact point, and controls the area around the contact point based on the remaining battery information. Information processing system equipped with.

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