JP2018180316A - Display control device, display, display control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display control device that can easily maintain appropriate display, a display, a display control method, and a program.SOLUTION: A display control device comprises a control part that controls the operation of a driving part outputting a driving signal to a display part, and the control part controls the driving part to perform an initialization operation at a predetermined timing during a display operation performed by the display part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a display control device, a display device, a display control method, and a program.

  BACKGROUND Conventionally, there are display devices that perform various displays on a display screen. In the display device, the display control unit controls the drive operation of the drive circuit (driver) that causes the display screen to perform the display operation to cause an appropriate display.

  At this time, in order to obtain a display with an appropriate luminance (density) gradation according to the characteristics of the display screen, the viewing condition, the content, etc., the drive circuit compares the gradation with the applied voltage according to the image data. It is necessary to hold the relationship (such as gamma value) correctly. Data indicating these relationships are inspected in advance, acquired, and stored as table data or the like (for example, Patent Document 1).

JP, 2016-133670, A

  However, mainly in portable display devices, the display control device is often placed in the immediate vicinity of the display screen. As a result, there is a problem that shielding of external disturbance with respect to a memory that stores settings and the like becomes insufficient, which may affect display.

  An object of the present invention is to provide a display control device, a display device, a display control method, and a program capable of easily maintaining appropriate display.

In order to achieve the above object, the present invention is
A control unit that controls the operation of a drive unit that outputs a drive signal to the display unit;
The control unit is a display control device that causes the drive unit to perform initialization operation at a predetermined timing during display operation of the display unit.

  According to the present invention, there is an effect that an appropriate display on the display device can be easily maintained.

It is a front view of a smart watch. It is a block diagram showing functional composition of a smart watch. It is a chart showing a list of display modes which can be switched by the smart watch. It is a flowchart which shows the control procedure of the display control processing performed with a smart watch. It is a flowchart which shows the control procedure of the display drive control processing performed by the display driver of a smart watch. It is a flowchart which shows the control procedure of the display control processing performed in the smart watch of 2nd Embodiment. It is a flowchart which shows the control procedure of the display control processing performed in the smart watch of 3rd Embodiment.

Hereinafter, embodiments of the present invention will be described based on the drawings.
First Embodiment
First, a smart watch which is an embodiment of a display device including an embodiment of a display control device of the present invention will be described.
FIG. 1 is a front view of the smart watch 100.

  As shown in FIG. 1A, the smart watch 100 is a display device capable of attaching the main body 1 to the arm (body) of the user using the band 2 (attachment portion). The main unit 1 of the smart watch 100 includes a frame 3 and a display screen 4 and the like.

  The frame 3 exposes and supports the display screen 4 on one side, and holds therein a functional configuration related to execution control of various operations.

Two display units are stacked on the display screen 4. As shown in FIG. 1 (b), a display screen 12a of the first display unit 12 (see FIG. 2; corresponding to the display unit of the present invention in the present embodiment) is provided at the lower portion. A display screen 22a of the 2 display unit 22 (see FIG. 2) is provided. That is, FIG. 1A shows a state in which the display is performed by the first display unit 12 and the display screen 22 a of the second display unit 22 transmits the display by the first display unit 12.
A touch sensor (touch panel) (not shown) is provided on the upper side of the second display unit 22 to receive user operation. A push button switch or the like may be provided on the side surface of the frame 3 so that the user can receive an operation with the touch sensor.

The first display unit 12 has a color liquid crystal display screen by dot matrix capable of displaying each color of RGB, for example, a display screen by TFT liquid crystal (Thin Film Transistor), etc., according to user's input operation and various program operations. Switching and / or parallel display of various displays related to various functions.
The second display unit 22 has a display screen capable of displaying the time by simplified display with lower power consumption than the first display unit 12, and performs, for example, a monochrome liquid crystal display by a segment system. Alternatively, a memory in-pixel liquid crystal (MIP liquid crystal) may be used for the display screen 22a of the second display unit 22, or a PN liquid crystal (Polymer Network) may be used. Further, by applying a predetermined voltage, the display screen 22a of the second display unit 22 can transmit the display content of the first display unit 12 upward without performing any display.

  The display screens of the first display unit 12 and the second display unit 22 and the display drivers 13 and 23 (see FIG. 2) described later are provided integrally or adjacent to each other.

FIG. 2 is a block diagram showing a functional configuration of the smart watch 100. As shown in FIG.
The smart watch 100 includes a main microcomputer 11, a first display unit 12 and its display driver 13, an operation reception unit 14, a wireless communication controller 15, an external storage unit 16, a sub-microcomputer 21, and a second display unit 22. The display driver 23, the measurement unit 24 (detection unit), the satellite radio wave reception module 25, and the PMIC 31 (Power Management IC) are provided.

  The main microcomputer 11 includes a main CPU 111, a RAM 112, a storage unit 113 (second storage unit), a clock unit 114 and the like, and is a main part of a control unit in the smart watch 100 of the present embodiment. The main microcomputer 11 receives power supply from the power supply via the PMIC 31, and controls the operation of each unit such as the first display unit 12, the display driver 13, the operation accepting unit 14, the wireless communication controller 15, and the external storage unit 16. The smart watch 100 executes main functional operations such as calculation (data processing), communication, and display according to user operation and settings.

The main CPU 111 performs various arithmetic processing to integrally control the operation of the smart watch 100 in a normal operation state. Further, the main CPU 111 acquires measurement data of the satellite radio wave reception module 25 and the measurement unit 24 from the sub-microcomputer 21 and performs various processes. The main CPU 111 may stop its operation automatically or in response to a predetermined input operation when the operation is not required.
The RAM 112 provides a work memory space to the main CPU 111 and stores temporary data.

  The storage unit 113 is a non-volatile memory such as a flash memory that stores control programs (including various application programs (applications)) executed by the main CPU 111 and setting data. The control program stored in the storage unit 113 includes a program 113 a related to switching of the display operation of the first display unit 12, the operation state of the main microcomputer 11, and the like. The setting data may include display settings of the first display unit 12, for example, user setting data of color tone. The setting data may include latest update data of setting data stored and used in a register 132 described later. Further, in the storage unit 113, display target image data to be displayed on the first display unit 12 is temporarily stored.

  The clock unit 114 counts the current date and time based on the control of the main CPU 111. The clock unit 114 has a counter and the like, and counts the date and time with higher accuracy than the RTC 214 described later according to the operation clock frequency of the main microcomputer 11.

  The first display unit 12 described above performs a display operation in accordance with the drive signal from the display driver 13. The display driver 13 mainly performs the display operation by the control operation of the main microcomputer 11 (main CPU 111). Here, while the display is turned off while the main microcomputer 11 is in the pause state, the display content is limited. Alternatively, the control operation may be performed by the sub-microcomputer 21 (sub-CPU 211).

  The display driver 13 causes the first display unit 12 to perform a display operation according to the control signal based on the control signal from the main microcomputer 11 or the sub-microcomputer 21. The display driver 13 includes a drive circuit 131, a register 132, a control circuit 133, a ROM 134 (first storage unit), and the like.

  The drive circuit 131 acquires each pixel data of the display target image from the main microcomputer 11, and the value of each gradation of each color of RGB is the luminance value on the display screen 12a of the first display unit 12, that is, the voltage value applied to the liquid crystal And output as a drive signal to the first display unit 12 at a predetermined timing.

  The register 132 stores setting data relating to the display operation by the first display unit 12. In the setting data, a display operation in the first display unit 12 such as a voltage value correspondence table (a value related to gamma correction or data of a more detailed tone curve) for converting a tone value of pixel data to an appropriate luminance value. Such setting values are included. The setting value stored in the register 132 is referred to by the drive circuit 131 and used for setting to output a voltage value corresponding to each gradation value. These values are commonly defined for a plurality of display modes (full color mode and color reduction mode) described later. Here, these setting values are updatable, but all or part of them may be fixed values.

  The control circuit 133 controls the output operation from the drive circuit 131 of the drive signal related to the image display operation by the first display unit 12. The control circuit 133 switches display settings such as on / off of image display by the first display unit 12 and luminance based on a control signal from the main microcomputer 11. Further, the control circuit 133 performs various operations relating to initial setting and setting update at the start of the operation of the display driver 13, shutdown processing at the time of the operation stop, restart, and initialization. The control operation of the control circuit 133 may be performed by software control by the CPU, or may be performed partially or entirely by a dedicated hardware circuit.

  The ROM 134 stores and holds the initial value of the correspondence table related to the above-described gamma correction, the initial value of the luminance setting value, and the like (initial data). These initial values are referred to when the display driver 13 is activated and written to the register 132. As described above, the update data of these setting values are stored in the storage unit 113, and when resetting the values other than the initial values when the display driver 13 is activated, the update data from the main microcomputer 11 after activation Is input and written to the register 132.

The display driver 13 can cause the first display unit 12 to perform predetermined gradation, for example, 8-bit 256 gradation, that is, 24-bit color display as a whole for each of the RGB colors.
Among the components of the display driver 13, the drive circuit 131, the register 132 and the ROM 134 constitute a drive unit in the smart watch 100 which is an embodiment of the display device having the display control device of the present invention. Further, the control circuit 133 and the main microcomputer 11 constitute a control unit of the smart watch 100 and a display control device.

  The operation reception unit 14 includes the above-described touch sensor, receives an input operation from the outside (that is, a user), converts the operation content into an electric signal, and outputs the electric signal to the main CPU 111. When the main CPU 111 is paused (in the standby state) when there is an input operation to the touch sensor, this electric signal becomes an operation resumption signal and the operation of the main CPU 111 is resumed.

  The wireless communication controller 15 is a controller for performing wireless communication with an external electronic device. The wireless communication standard is not particularly limited, and examples thereof include near field wireless communication such as Bluetooth (registered trademark: Bluetooth), a wireless LAN (IEEE 802.11), and the like. The main microcomputer 11 (main CPU 111) can acquire necessary information and programs, update data thereof, and the like from the outside via the wireless communication controller 15. Examples of the external electronic device to be connected for communication include, but are not limited to, a smartphone, a mobile phone, a tablet terminal, a PDA (Personal Digital Assistant), and the like.

  The external storage unit 16 is a non-volatile large-capacity storage, and stores map data and the like for performing navigation and map display. The external storage unit 16 is not limited to one incorporated in the smart watch 100, but may be one provided with a removable portable storage medium (storage medium) such as a flash memory. Further, the map data is not limited to one provided in advance by a storage medium or the like, and the map data previously acquired by the user according to the change of the positioning result using WiFi etc. It may be something.

  The sub microcomputer 21 includes a sub CPU 211, a RAM 212, a storage unit 213, an RTC 214 (real time clock), a buffer memory 215, and the like. The sub-microcomputer 21 operates by receiving power supply from the power supply via the PMIC 31. In addition, the sub-microcomputer 21 controls the operation of the second display unit 22 (that is, the display driver 23), the measurement unit 24, and the satellite radio wave reception module 25 and the exchange of data with the main microcomputer 11. The power consumption of the sub-microcomputer 21 (during normal operation and maximum time; mainly based on TDP (thermal design power of the CPU) and the effect of the capacity and number of RAM, etc. can be used as a standard) The sub control unit is smaller than the power consumption of the main microcomputer 11 (during normal operation and maximum operation, respectively), and is a sub control unit for performing an operation that is continuously performed with relatively small power consumption.

The sub CPU 211 performs various arithmetic processing to integrally control the operation of the sub microcomputer 21. The sub CPU 211 may have lower power consumption (TDP or the like) than the main CPU 111 and accordingly may have a lower capability than the main CPU 111. As long as the sub CPU 211 is not short of the power supply from the PMIC 31, the minimum operation is maintained here. If the minimum operation is periodically performed at a predetermined interval, the operation other than the period of operation at the predetermined interval may be paused (even in the standby state).
The RAM 212 provides a working memory space to the sub CPU 211 and stores temporary data. The RAM 212 holds stored data as long as the power supply from the PMIC 31 is normally performed even when the sub CPU 211 performs the operation intermittently as described above.

  The storage unit 213 is a non-volatile memory such as a flash memory that stores control programs (including various applications) executed by the sub CPU 211 and setting data. The control program includes an operation control program of the measurement unit 24 controlled by the sub-microcomputer 21 and the satellite radio wave reception module 25.

  The RTC 214 is a normal one that performs timekeeping operation of time, and as described above, the accuracy is lower than the timekeeping operation by the timekeeping unit 114 of the main microcomputer 11, but the power consumption related to the timekeeping operation than the timekeeping unit 114 The time is continuously counted even when the main microcomputer 11 is stopped or the sub-microcomputer 21 is on standby.

  The buffer memory 215 is a volatile memory that temporarily stores the positioning result acquired by the satellite radio wave reception module 25. The buffer memory 215 is, for example, a static RAM (SRAM). The positioning result acquired by the satellite radio wave reception module 25 is once stored in the buffer memory 215 and transferred to the main microcomputer 11 at a timing according to the set conditions.

  The second display unit 22 performs a display operation in accordance with the drive signal from the display driver 23. As described above, the second display unit 22 consumes less power than the first display unit 12, and is used to display time during a display operation. When the MIP liquid crystal is used for the display screen, the second display unit 22 can reduce the update frequency of the display content by the control of the sub CPU 211. The content of the display by the second display unit 22 mainly includes the current date and time or a part thereof, for example, hour, minute, second, day of the week, date and the like, but is not limited thereto.

  The display driver 23 performs a driving operation of the second display unit 22 according to display target image data input from the sub-microcomputer 21 and displays the display target image on the display screen 22 a of the second display unit 22. The display by the second display unit 22 is monochrome binary display, and outputs a binary drive signal according to the presence / absence of display of each pixel (including the case of a segment).

  The measuring unit 24 has a sensor that measures a physical quantity that indicates the motion state (the state of the own device) of the smart watch 100. Here, the measurement unit 24 includes an acceleration sensor, and may additionally include an azimuth sensor (a geomagnetic field sensor), an atmospheric pressure sensor (used as an altitude sensor), and the like. In addition, the measurement unit 24 detects a predetermined posture of the smart watch 100, in this case, a tilt sensor that detects a tilt state of the smart watch 100 when the user holds the arm in front of the eye for easy viewing of the display screen of the smart watch 100. have.

  The satellite radio wave reception module 25 captures and receives radio waves from positioning satellites related to various satellite positioning systems such as GNSS (Global Navigation Satellite System) based on the control of the sub microcomputer 21 (sub CPU 211). It is a module capable of demodulating and acquiring time and positioning (acquiring position information).

  The PMIC 31 controls the power supply from the power supply to the main microcomputer 11 and the sub-microcomputer 21. The PMIC 31 includes, for example, a switch for supplying power to the main microcomputer 11 and the sub-microcomputer 21 and a DC / DC converter for adjusting the output voltage etc. Supply to these.

Next, the display control operation in the smart watch 100 of the first embodiment will be described.
FIG. 3 is a chart showing a list of display modes that can be switched by the smart watch 100.

  In the smart watch 100 according to the present embodiment, the display operation of the first display unit 12 can be switched between the on state and the off state according to the use (viewing) condition of the user. While the display operation by the first display unit 12 is off, the display operation in the save mode by the second display unit 22 is performed. In addition, at the time of display operation by the first display unit 12, display in a plurality of display modes, here, 24-bit full color mode (first display mode), and color reduction with a predetermined number of colors, for example, 256 colors Display switching can be performed according to the type of display mode between the mode (second display mode). Furthermore, in each of the full color mode and the color reduction mode, it may be possible to further increase or decrease the luminance of the liquid crystal backlight (mainly, the reduction of the luminance in the color reduction mode).

  Switching between the full color mode and the color reduction mode is performed by the main microcomputer 11, and display target image data in the selected display mode is generated, temporarily stored in the storage unit 113, and output to the display driver 13. Ru. The display driver 13 performs a driving operation according to the type of display mode on the first display unit 12 by outputting a driving signal according to the input display target image data to the first display unit 12. In the display mode, the power consumption related to the display operation in the full color mode is the largest. In the color reduction mode, the memory capacity required for setting the color table is smaller than that in the full color mode, and the power consumption is reduced because the processing is simplified. In addition, as described above, the display operation in the save mode by the second display unit 22 consumes less power than the display operation in any display mode by the first display unit 12.

  These display modes are switched by the user performing various input operations to the operation reception unit 14, detection of the user's visual recognition operation of the display screen 4 by the tilt sensor of the measurement unit 24, movement of the user's smart watch 100 by the acceleration sensor ( Use) It is switched based on the detection presence etc. For example, in the display state in the full color mode, a state in which no input operation is performed on the operation reception unit 14 and the inclination sensor determines that the user is not in the visual recognition state is a predetermined reference time (for example, 30 seconds) In the case where the above continues, it is possible to shift to the color reduction mode without changing the display content itself. In addition, when a predetermined operation to shift the operation of the main microcomputer 11 to the pause state is received by the operation reception unit 14 or the motion of the smart watch 100 is measured by the acceleration sensor of the measurement unit 24 for a predetermined time (for example, 30 minutes). If not detected, the display operation by the first display unit 12 is also stopped according to the transition of the main microcomputer 11 to the pause state, and the display operation is switched to the save mode by the second display unit 22. .

  Signals relating to switching of the operation state of the main microcomputer 11 and the display state of the first display unit 12 are exchanged between the main microcomputer 11 and the sub-microcomputer 21 as necessary. Thereby, when the display by the first display unit 12 is stopped, the sub-microcomputer 21 promptly starts the display operation by the second display unit 22 and when the display by the first display unit 12 is started. The sub-microcomputer 21 ends the display operation by the second display unit 22.

  On the other hand, in the color reduction mode or the save mode, when the detection of the visual operation of the display screen 4 by the user or the predetermined input operation to the operation reception unit 14 related to the restart of the main microcomputer 11 is detected, The control operation of the first display unit 12 resumes the display operation, and returns from the color reduction mode to the full color mode.

In the smart watch 100, the reset operation (initialization operation) of the drive circuit 131 and the register 132 (drive unit) or the entire reset operation of the display driver 13 is performed at a predetermined timing during the display operation by the first display unit 12. . As described above, the gamma correction data is stored in the register 132, and may be held for a long time in some cases while the display operation by the first display unit 12 is continued, and used for image display. In such a case, in the smart watch 100 having a long contact time with the human body, static electricity transmitted through the display screen or the like may affect the output data to the register 132 and its drive circuit 131, so an appropriate interval Initialize the entire drive unit or display driver 13 (restarting in the case of the display driver 13 as a whole) and initialize the setting data stored in the register 132 (that is, reset the initial value) . Here, since the display state is not affected as much as possible, the initialization operation is performed at the switching timing of the display mode or the timing at which the display content on the first display unit 12 is largely switched.
In the initialization of the entire drive unit or display driver 13, a reset operation of a latch circuit (not shown) may also be performed.

FIG. 4 is a flowchart showing a control procedure by the main microcomputer 11 of the display control process by the first display unit 12 executed by the smart watch 100 of the present embodiment.
This display control process is activated at the timing when the display operation by the first display unit 12 is turned on.

  When the display control process is started, the main microcomputer 11 (main CPU 111) causes the display driver 13 and the first display unit 12 to start supplying power to activate the display driver 13 (step S101). The main microcomputer 11 determines whether it has setting data relating to gamma correction or the like (step S102). If it is determined that the image data is stored ("YES" in step S102), the main microcomputer 11 outputs the setting to the display driver 13 (step S103). Then, the processing by the main microcomputer 11 shifts to step S104. If it is determined that the setting is not included ("NO" in step S102), the process by the main microcomputer 11 proceeds to step S104.

  After shifting to the process of step S104, the main microcomputer 11 determines whether a condition for turning off the display operation by the first display unit 12 is satisfied (step S104). When it is determined that the condition is satisfied ("YES" in step S104), the main microcomputer 11 outputs a control signal to the display driver 13 to stop the display operation of the first display unit 12. Further, the main microcomputer 11 stops the operation of the display driver 13 (step S111). Then, the main microcomputer 11 ends the display control process.

  If it is determined that the condition for turning off the display operation by the first display unit 12 is not satisfied (“NO” in step S104), the main microcomputer 11 causes display target image data to be displayed on the display screen 12a. It generates (step S105). The main microcomputer 11 determines whether there is a change in display content or a change in display mode (step S106). Here, the change of the display content means a major change such as switching of display according to different functions (applications) or switching of the display content within the same function, for example, by a predetermined ratio (10% to 50%, etc.) It is possible not to include time-lapse fine changes of the same display object. If it is determined that there is neither a change in display content nor a change in display mode ("NO" in step S106), the processing of the main microcomputer 11 proceeds to step S110.

  If it is determined that there is a change in display content or a change in display mode ("YES" in step S106), the main microcomputer 11 requests the display driver 13 to initialize the register 132 (step S107) . The main microcomputer 11 determines whether the setting data related to the setting value of the register 132 is included (here, the update data is stored in the storage unit 113) (step S108). If it is determined that it does not have ("NO" in step S108), the processing of the main microcomputer 11 proceeds to step S110.

  If it is determined that the setting value of the register 132 is included ("YES" in step S108), the main microcomputer 11 requests the display driver 13 to update the setting data after the display driver 13 has started normally. Are output to the display driver 13 (step S109). Then, the processing of the main microcomputer 11 shifts to step S110.

  When the process proceeds to step S110, the main microcomputer 11 outputs a control signal including the image data of the display target image to the display driver 13, and causes the first display unit 12 to display the display target image (step S110). Then, the processing of the main microcomputer 11 returns to step S104.

  FIG. 5 is a flowchart showing a control procedure by the control circuit 133 of display drive control processing executed by the display driver 13 of the smart watch 100. The display drive control process is started at the same time as the display driver 13 is started.

  When the display drive control process is started, the control circuit 133 refers to the ROM 134 to initialize the register 132 and the like (step S141). The control circuit 133 determines whether the setting data or the update request for the setting data has been input from the main microcomputer 11 (step S142). If it is determined that the setting data is input or the setting data update request has been made ("YES" in step S142), the control circuit 133 updates the setting of the register 132 (step S143). In this case, the control circuit 133 may obtain the input setting data and write the same into the register 132, or may directly set the main microcomputer 11 to a predetermined address of the register 132 in response to an update request or the like. It may be switched to input data. Then, the process of the control circuit 133 proceeds to step S144. If it is determined that the setting data or the update request for the setting data is not input ("NO" in step S142), the process of the control circuit 133 proceeds to step S144.

  At step S144, the control circuit 133 causes the operation of the drive circuit 131 to start and causes the first display unit 12 to display an image corresponding to the image data input from the main microcomputer 11 (step S144). .

  The control circuit 133 determines whether the setting data or the update request for the setting data has been input from the main microcomputer 11 (step S145). If it is determined that the setting data has been input or the setting data update request has been made (“YES” in step S145), the control circuit 133 resets the setting data by updating the setting of the register 132 (step S146). Then, the process of the control circuit 133 proceeds to step S147. If it is determined that the setting data is not input ("NO" in step S145), the process of the control circuit 133 proceeds to step S147.

  In the process of step S147, the control circuit 133 determines whether an instruction to end the display operation by the first display unit 12 has been acquired or whether an instruction to initialize the register 132 has been acquired (step S147). If it is determined that one of them has been acquired ("YES" in step S147), the control circuit 133 performs an operation stop process of the drive circuit 131 (step S148). Further, the control circuit 133 stops its own operation and ends the display drive control process. In the case of the instruction of the initialization operation of the register 132, the control circuit 133 is restarted immediately thereafter and the display drive control process is also restarted.

  If it is determined that neither the display operation end instruction nor the instruction of the initialization operation of the register 132 has been acquired (“NO” in step S147), the process of the control circuit 133 returns to step S145.

Here, although shown as flow control, when these processes are performed by the hardware circuit, the process of switching to the initial setting and setting update of the register 132 in accordance with the instruction input by the interrupt, and the driving circuit 131 The process of starting and ending the operation may be started.
The processing of steps S107 to S109 in the main microcomputer 11 and the processing of steps S141 to S143 in the control circuit 133 correspond to the initialization step in the embodiment of the display control method of the present invention and the initialization unit in the embodiment of the program of the present invention. Do.

As described above, the smart watch 100 according to the present embodiment of the display control device controls the operation of the drive unit (the drive circuit 131 and the register 132) that outputs the drive signal to the first display unit 12 (main unit The control unit causes the drive unit to perform initialization operation at a predetermined timing during display operation of the first display unit 12.
In this manner, the drive unit is appropriately initialized during the display operation by the first display unit 12 so that the problem of setting data that may occur from the register 132 to the drive circuit 131 due to static electricity or the like during display operation does not increase too much. To reduce the adverse effect on the display. Thus, the display on the display device can be easily maintained in an appropriate state.

In addition, the control unit causes the drive unit to output a drive signal according to the type of display mode that is set among the plurality of display modes related to the display operation of the first display unit 12, and The drive unit is initialized at least in part.
By performing the initialization operation of the drive unit in accordance with the switching timing of the display mode as described above, it is possible to effectively suppress the user's discomfort due to the display being interrupted momentarily during the initialization operation.

The plurality of display modes include a full color mode and a color reduction mode in which the luminance is reduced or reduced compared to the full color mode.
As described above, particularly in portable display devices such as the smart watch 100, since the display mode is frequently switched to the color reduction mode for the purpose of reducing power consumption in a situation where the user does not visually recognize the display content, a large interval The setting data can be read properly without opening the file.

  Further, the control unit causes the drive unit to perform initialization operation at the switching timing when the display in the color reduction mode is switched to the display in the full color mode. In this way, a display that gives a sense of incongruity to the user who visually recognizes the display content by particularly performing the initialization operation at the timing when the user visually recognizes the display content and switching to the display mode with a large number of gradations of the display color. Can sufficiently reduce the possibility of the occurrence of a problem and cause an appropriate display.

  Further, the control unit causes the drive unit to perform the initialization operation at least at a part of the timing at which the display content by the first display unit 12 is switched by a predetermined ratio or more. As described above, even when the display mode is not switched or when the long time interval is open, the initialization operation is performed according to the timing at which the display content largely changes, thereby causing the image display interruption due to the initialization operation. Such discomfort to the user can be minimized.

Further, the drive unit has a register 132 for storing setting data related to the display operation by the first display unit 12, and the control unit initializes the setting data of the register 132 at the time of the initialization operation.
That is, by resetting the setting data of the register 132 with the initial value stored and held in the ROM 134 at the time of the initialization operation, even if the setting value itself of the register 132 has a problem, the initial value is corrected to the correct initial value. Since it is returned, the display image can be made appropriate.

  The setting data stored in the register 132 is commonly defined for a plurality of display modes. That is, the resetting of the setting data at the time of the initialization operation is not for intentionally changing display settings such as contrast and color tone in accordance with the change of the image display mode. By performing such re-setting at the time of the initialization operation performed at appropriate intervals, the occurrence of the disturbance of the display image and the user's discomfort can be minimized and the appropriate display can be easily performed continuously. It becomes possible.

Further, the setting data includes a value related to gamma correction.
In many cases, not all gradation values of RGB colors used for display are used, and there are many display images in which essential information is not included in the gradation itself, so a slight deviation or the like may cause a display image to be displayed. In many cases, this does not have a major effect, but if such deviation increases, problems such as discomfort may occur in the display image, so by initializing and resetting at appropriate intervals, appropriate display can be easily achieved. It will be possible to keep for a long time.

The setting data can be updated, and the control unit resets the setting data to be stored in the register 132 at the time of the initialization operation of the drive unit as the latest update data.
As described above, when the setting data can be updated at the time of the initialization operation, not only the initial value but also the setting of the updated value can prevent the change of the color tone of the display image and the like. Therefore, the appropriate display based on the setting data can be maintained for a long time.

The control unit also includes a ROM 134 for storing and holding initial data of the setting data, and a storage unit 113 for storing and holding updated data of the setting data. Is initialized, and when the update data is stored in the storage unit 113, the update data is set in the register 132.
As described above, by storing the initial data and the update data separately and not erasing the initial data even after the update, such an appropriate operation can easily be performed while the initialization operation for easily returning the initial data is easily possible. It is possible not to change the display based on the updated setting data at the time of the initialization operation in the case where the display is maintained.

Further, the smart watch 100 according to the present embodiment includes the configuration of the control unit related to the display control device described above, the first display unit 12, and the drive unit.
With such a display device, it is possible to suppress the influence of the user on the display image such as static electricity, and easily maintain an appropriate display.

Further, the smart watch 100 includes the operation receiving unit 14 that receives a user operation, and the control unit is configured such that the operation receiving unit 14 does not receive an operation for a predetermined reference time or more (here, the measuring unit 24 simultaneously displays The display mode is switched to the color reduction mode when it is determined that the screen 4 is not in the visible state, and the drive unit is initialized at the switching timing of the display mode.
As described above, in the smart watch 100, the initialization operation of the drive unit, the resetting of the setting data, and the like are performed as the spontaneous operation of the control unit separately from the change of the setting data such as gamma correction by the operation of the user. As a result, in the smart watch 100 as a display device, it is possible to easily maintain an appropriate display state without the user's time and effort.

The smart watch 100 further includes a measurement unit 24 (in particular, an inclination sensor) that detects a specific inclination state of the own device corresponding to a case where the user visually recognizes the display content by the first display unit 12, and the control unit The unit 24 switches the display mode based on the presence or absence of detection of the specific tilt state of the own device, and performs the initialization operation of the drive unit accompanying the switching of the display mode.
As described above, the smart watch 100 appropriately controls the power consumption by switching the display mode and initializing the drive unit in accordance with the user's viewing condition, particularly at the start of the viewing operation of the display screen 4. It is possible to perform proper display in full color mode at the time of user's viewing.

  The smart watch 100 also has a band 2 for wearing on a body (here, an arm). As described above, in the display device mounted on the user's body, in particular, each configuration of the present invention is performed, and each control operation is performed to prevent static electricity (charge or high voltage) based on contact with the user. The influence can be properly reduced and the proper display can be maintained for a long time.

The display control method according to the present embodiment is a display control method for controlling the operation of the drive unit that outputs the drive signal to the first display unit 12, and the drive unit is in the display operation of the first display unit 12. And an initialization step of performing initialization operation at a predetermined timing.
In this manner, the drive unit is appropriately initialized during the display operation by the first display unit 12 so that the problem of setting data that may occur from the register 132 to the drive circuit 131 due to static electricity or the like during display operation does not increase too much. To reduce the adverse effect on the display. This makes it possible to easily maintain the display in an appropriate state.

Similarly, the program 113a of the present embodiment controls the main microcomputer 11 to control the operation of the drive unit that outputs the drive signal to the first display unit 12, and the display operation of the first display unit 12 to drive the drive unit. It functions as an initialization unit that performs initialization operation at a predetermined timing in the inside.
In this manner, the drive unit is appropriately initialized during the display operation by the first display unit 12 so that the problem of setting data that may occur from the register 132 to the drive circuit 131 due to static electricity or the like during display operation does not increase too much. To reduce the adverse effect on the display. This makes it possible to easily maintain the display in an appropriate state.

Second Embodiment
Next, a smart watch according to a second embodiment will be described.
The configuration of the smart watch 100 according to the second embodiment is the same as that of the smart watch 100 according to the first embodiment, and the explanation will be omitted as the same reference numerals are used.

FIG. 6 is a flowchart showing a control procedure by the main microcomputer 11 of the display control process executed in the smart watch 100 of the second embodiment.
This display control process is the same as the display control process executed in the smart watch 100 according to the first embodiment, except that step S121 is added, and the same process contents have the same reference numerals. The detailed explanation is omitted.

  If it is determined in step S106 that neither a change in display content nor a change in display mode has been made ("NO" in step S106), the main microcomputer 11 (main CPU 111) performs the previous initialization operation of the display driver 13. It is determined whether or not a predetermined upper limit time has elapsed since it was performed (step S121). The previous initialization operation includes both the one performed at the time of activation of the display driver 13 at steps S101 to S103 and the one performed at the request of step S107. If it is determined that the upper limit time has elapsed ("YES" in step S121), the processing of the main microcomputer 11 proceeds to step S107. If it is determined that the upper limit time has not elapsed, the processing of the main microcomputer 11 proceeds to step S110.

As described above, in the smart watch 100 according to the second embodiment, the control unit (the main microcomputer 11 and the control circuit 133) controls the drive unit (the drive circuit 131 and the drive circuit 131) while the display operation of the first display unit 12 is performed. If the initialization operation of the register 132) is not performed, the drive unit is initialized.
Thus, in addition to the initialization operation of the drive unit at the switching timing of the display mode and the large change timing of the display content performed similarly to the smart watch 100 of the first embodiment, even when such switching or changing is not performed. By performing the initialization operation at the minimum time interval, it is possible to suppress a change in setting data that causes a large problem in display and easily maintain an appropriate display state.

Third Embodiment
Next, a smart watch according to a third embodiment will be described.
The configuration of the smart watch 100 according to the third embodiment is the same as that of the smart watch 100 according to the first embodiment, and the explanation will be omitted as using the same reference numerals.

FIG. 7 is a flowchart showing a control procedure by the main microcomputer 11 of the display control process executed in the smart watch 100 of the third embodiment.
This display control process is the same as the display control process performed in the smart watch 100 according to the first embodiment except that the process in step S121a is performed instead of the process in step S106, and is the same. The same reference numerals are given to the process contents of and the detailed description is omitted.

  After the process of step S105, the main microcomputer 11 (main CPU 111) determines whether or not a time corresponding to a predetermined time interval which has been determined in advance has elapsed since the initialization operation of the display driver 13 last time was performed. (Step S121a). The previous initialization operation includes both the one performed at the time of activation of the display driver 13 at steps S101 to S103 and the one performed at the request of step S107. If it is determined that the predetermined time has elapsed ("YES" in step S121a), the processing of the main microcomputer 11 proceeds to step S107. If it is determined that the predetermined time has not elapsed, the processing of the main microcomputer 11 proceeds to step S110.

As described above, in the smart watch 100 according to the third embodiment, the control unit (the main microcomputer 11 and the control circuit 133) controls the drive unit (the drive circuit 131 and the drive circuit 131) at predetermined time intervals during the display operation of the first display unit 12. The register 132) is initialized.
As described above, by performing the initialization operation periodically during the display operation, even if the display screen does not switch over a long time, the drive unit is properly properly operated without causing a serious problem in the image quality of the display image. You can easily keep the proper display.

The present invention is not limited to the above embodiment, and various modifications are possible.
For example, in the above embodiment, two types of the full color mode and the color reduction mode are shown as the display mode of the first display unit 12, and it is shown that there may be a mode for reducing the luminance, but other display modes There may be.
Further, the color reduction mode is not limited to one type, and a plurality of types, for example, 256 colors and 16 gradations of monochrome may be defined.

  Further, in the above embodiment, the voltage value corresponding to the gradation value of each color of RGB is stored in the register 132 to obtain a desired luminance, but the voltage is fixed and desired is obtained by duty driving (chopper operation). It may be configured to obtain luminance. In this case, the register 132 stores a correspondence table indicating the correspondence between the gradation value and the duty ratio.

  Further, in the above embodiment, the switching timing of the display mode and the timing of the large change of the display content are shown as the timing of the initialization operation, but any one of them may be used. In addition, the initialization operation may be performed only when the color reduction mode is switched to the full color mode at the switching timing of the display mode. Further, conditions etc. in which the initialization operation may be performed may be predetermined for each display related to each function.

  Although the setting data of the register 132 is common to each display mode in the above embodiment, the setting data may be different depending on the display mode. In the present invention, even in these cases, not only the setting data is simply reset, but also the initialization operation of the drive unit is appropriately performed.

  Although the ROM 134 is held in the display driver 13 in the above embodiment, initial setting data may be output from the main microcomputer 11 and set in the register 132. Alternatively, conversely, the display driver 13 may have a non-volatile memory for storing update setting data.

  In the above embodiment, the control unit has been described as including the main microcomputer 11 and the control circuit 133 of the display driver 13. However, in the display driver 13, only the operation according to the control signal from the main microcomputer 11 is performed. It is also possible not to have the configuration related to the control operation. Alternatively, on the contrary, the control circuit 133 may independently determine the necessity and timing of the initialization operation based on the display target image data and the like from the main microcomputer 11.

  In the above embodiment, the smart watch 100 having the operation receiving unit 14 and the measuring unit 24 has been described as an example, but a display device without at least one of these or simply delivery of image data from an external device It may be a display device (monitor device) that receives and displays it. Further, the display control device may be a device independent of the display device that causes the display device to output a display image. In addition, as the measurement unit 24, a user may determine the viewing condition of the display screen 4 or the use condition of the smart watch 100 by using a sensor other than the tilt sensor.

  Further, in the above embodiment, although the arm-mounted display device has been described as an example, the display device mounted on other parts, for example, a display device such as a glass (glasses) type, goggle type, etc. good. The present invention can also be applied to display devices other than body-worn type, mainly portable ones, and intermediate ones of them, such as head-mounted displays.

  Further, in the above embodiment, although the display unit has a liquid crystal display screen as an example, the display unit may have another display screen such as an organic EL display.

In the above description, the storage unit 113 having a non-volatile memory is taken as an example as a computer-readable medium for storing the program 113a of the display control process related to the processing operation of the main CPU 111 (main microcomputer 11) according to the present invention. However, the present invention is not limited to this. As other computer readable media, it is possible to apply a portable recording medium such as a hard disk drive (HDD) or a CD-ROM or a DVD disc. Also, as a medium for providing data of the program according to the present invention via a communication line, carrier wave (carrier wave) is also applied to the present invention.
In addition, specific details such as the configuration, control contents, and procedures described in the above embodiment can be appropriately changed without departing from the spirit of the present invention.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and the equivalents thereof.
In the following, the invention described in the claims initially attached to the request for this application is appended. The item numbers of the claims described in the appendix are as in the claims attached at the beginning of the application for this application.

[Supplementary note]
<Claim 1>
A control unit that controls the operation of a drive unit that outputs a drive signal to the display unit;
The display control device, wherein the control unit causes the drive unit to perform initialization operation at a predetermined timing during display operation of the display unit.
<Claim 2>
The control unit causes the drive unit to output a drive signal according to the type of display mode that is set among the plurality of display modes related to the display operation of the display unit, and at least at the switching timing of the display mode The display control device according to claim 1, wherein the drive unit is partially initialized.
<Claim 3>
The display according to claim 2, wherein the plurality of display modes include a first display mode, and a second display mode for reducing or reducing the luminance than the first display mode. Control device.
<Claim 4>
The display control device according to claim 3, wherein the control unit causes the drive unit to perform an initialization operation at a switching timing when the display in the second display mode is switched to the display in the first display mode. .
<Claim 5>
The controller according to any one of claims 1 to 4, wherein the control unit causes the drive unit to perform an initialization operation at at least a part of the timing at which the display content by the display unit is switched by a predetermined ratio or more. Display control device.
<Claim 6>
5. The control unit according to claim 4, wherein the control unit causes the drive unit to perform an initialization operation when the initialization operation of the drive unit is not performed for a predetermined upper limit time or more during the display operation of the display unit. 5. The display control device according to 5.
<Claim 7>
The display control device according to claim 1, wherein the control unit causes the drive unit to perform initialization operation at predetermined time intervals during display operation of the display unit.
<Claim 8>
The drive unit has a register for storing setting data related to a display operation by the display unit.
The display control device according to any one of claims 1 to 7, wherein the control unit initializes setting data of the register at the time of the initialization operation.
<Claim 9>
The drive unit has a register for storing setting data related to a display operation by the display unit.
The setting data is commonly defined for the plurality of display modes,
The display control device according to any one of claims 2 to 4, wherein the control unit initializes setting data of the register at the time of the initialization operation.
<Claim 10>
10. The display control apparatus according to claim 8, wherein the setting data includes a value related to gamma correction.
<Claim 11>
The setting data can be updated,
The display control device according to any one of claims 8 to 10, wherein the control unit resets setting data stored in the register at the time of initialization operation of the drive unit as the latest update data. .
<Claim 12>
A first storage unit that stores and holds initial data of the setting data;
A second storage unit that stores and holds the update data of the setting data;
Equipped with
The control unit initializes the setting data with the initial data at the time of the initialization operation of the drive unit, and when the update data is stored in the second storage unit, the update data is stored in the register The display control apparatus according to claim 11, wherein the display control apparatus is set to
<Claim 13>
The display control device according to any one of claims 1 to 12.
The display unit;
The drive unit;
A display device comprising:
<Claim 14>
The display control device according to any one of claims 2 to 4 and 9;
The display unit;
The drive unit;
An operation reception unit that receives a user operation;
Equipped with
The display device is characterized in that the control unit switches the display mode when the operation reception unit has not received an operation for a predetermined reference time or more.
<Claim 15>
The display control device according to any one of claims 2 to 4 and 9;
The display unit;
The drive unit;
A detection unit that detects a state of the own device corresponding to a case where the user visually recognizes the display content by the display unit;
Equipped with
The display device, wherein the control unit switches the display mode based on whether the detection unit detects the state.
<Claim 16>
The display device according to any one of claims 13 to 15, further comprising a mounting unit for mounting on a body.
<Claim 17>
A display control method for controlling the operation of a drive unit that outputs a drive signal to a display unit, comprising:
A display control method comprising: an initialization step of initializing the drive unit at a predetermined timing during display operation of the display unit.
<Claim 18>
A computer that performs an operation of controlling an operation of a drive unit that outputs a drive signal to the display unit;
A program characterized in that the drive unit functions as an initialization unit that performs initialization operation at a predetermined timing during display operation of the display unit.

1 main unit 2 band 3 frame 4 display screen 11 main microcomputer 111 main CPU
112 RAM
113 storage unit 113a program 114 clock unit 12 first display unit 12a display screen 13 display driver 131 drive circuit 132 register 133 control circuit 134 ROM
14 Operation Reception Unit 15 Wireless Communication Controller 16 External Storage Unit 21 Sub Microcomputer 211 Sub CPU
212 RAM
213 storage unit 214 RTC
215 Buffer Memory 22 Second Display 22a Display Screen 23 Display Driver 24 Measuring Unit 25 Satellite Radio Wave Reception Module 100 Smart Watch

Claims (18)

A control unit that controls the operation of a drive unit that outputs a drive signal to the display unit;
The display control device, wherein the control unit causes the drive unit to perform initialization operation at a predetermined timing during display operation of the display unit.   The control unit causes the drive unit to output a drive signal according to the type of display mode that is set among the plurality of display modes related to the display operation of the display unit, and at least at the switching timing of the display mode The display control device according to claim 1, wherein the drive unit is partially initialized.   The display according to claim 2, wherein the plurality of display modes include a first display mode, and a second display mode for reducing or reducing the luminance than the first display mode. Control device.   The display control device according to claim 3, wherein the control unit causes the drive unit to perform an initialization operation at a switching timing when the display in the second display mode is switched to the display in the first display mode. .   The controller according to any one of claims 1 to 4, wherein the control unit causes the drive unit to perform an initialization operation at at least a part of the timing at which the display content by the display unit is switched by a predetermined ratio or more. Display control device.   5. The control unit according to claim 4, wherein the control unit causes the drive unit to perform an initialization operation when the initialization operation of the drive unit is not performed for a predetermined upper limit time or more during the display operation of the display unit. 5. The display control device according to 5.   The display control device according to claim 1, wherein the control unit causes the drive unit to perform initialization operation at predetermined time intervals during display operation of the display unit. The drive unit has a register for storing setting data related to a display operation by the display unit.
The display control device according to any one of claims 1 to 7, wherein the control unit initializes setting data of the register at the time of the initialization operation. The drive unit has a register for storing setting data related to a display operation by the display unit.
The setting data is commonly defined for the plurality of display modes,
The display control device according to any one of claims 2 to 4, wherein the control unit initializes setting data of the register at the time of the initialization operation.   10. The display control apparatus according to claim 8, wherein the setting data includes a value related to gamma correction. The setting data can be updated,
The display control device according to any one of claims 8 to 10, wherein the control unit resets setting data stored in the register at the time of initialization operation of the drive unit as the latest update data. . A first storage unit that stores and holds initial data of the setting data;
A second storage unit that stores and holds the update data of the setting data;
Equipped with
The control unit initializes the setting data with the initial data at the time of the initialization operation of the drive unit, and when the update data is stored in the second storage unit, the update data is stored in the register The display control apparatus according to claim 11, wherein the display control apparatus is set to The display control device according to any one of claims 1 to 12.
The display unit;
The drive unit;
A display device comprising: The display control device according to any one of claims 2 to 4 and 9;
The display unit;
The drive unit;
An operation reception unit that receives a user operation;
Equipped with
The display device is characterized in that the control unit switches the display mode when the operation reception unit has not received an operation for a predetermined reference time or more. The display control device according to any one of claims 2 to 4 and 9;
The display unit;
The drive unit;
A detection unit that detects a state of the own device corresponding to a case where the user visually recognizes the display content by the display unit;
Equipped with
The display device, wherein the control unit switches the display mode based on whether the detection unit detects the state.   The display device according to any one of claims 13 to 15, further comprising a mounting unit for mounting on a body. A display control method for controlling the operation of a drive unit that outputs a drive signal to a display unit, comprising:
A display control method comprising: an initialization step of initializing the drive unit at a predetermined timing during display operation of the display unit. A computer that performs an operation of controlling an operation of a drive unit that outputs a drive signal to the display unit;
A program characterized in that the drive unit functions as an initialization unit that performs initialization operation at a predetermined timing during display operation of the display unit.

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