JP2018028586A - Display device, electronic apparatus, and electronic control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of improving responsiveness by update control of display and reducing power consumption.SOLUTION: The electronic apparatus comprises a control section, a display adapter, and a display section. The control section includes a memory, a radio communication module, a GPS module, and a CPU. The display adapter includes first and second display controllers, and a selecting circuit. The display section includes a first display area and a second display area. The electronic apparatus has a function to acquire display information by the radio communication module and positional information by the GPS module and to generate display data that is given a flag for specifying an area to be displayed. The display controller is selected by the given flag, and the display data can be displayed either on the first display area or the second display area.SELECTED DRAWING: Figure 1

Description

  One embodiment of the present invention relates to a display device, an electronic device, and an electronic control system.

  Note that one embodiment of the present invention is not limited to the above technical field. The technical field of one embodiment of the invention disclosed in this specification and the like relates to an object, a method, or a manufacturing method. Or this invention relates to a process, a machine, a manufacture, or a composition (composition of matter). In particular, one embodiment of the present invention relates to a semiconductor device, a display device, a light-emitting device, a power storage device, a memory device, a driving method thereof, or a manufacturing method thereof.

  Note that in this specification and the like, a semiconductor device refers to an element, a circuit, a device, or the like that can function by utilizing semiconductor characteristics. As an example, a semiconductor device such as a transistor or a diode is a semiconductor device. As another example, the circuit including a semiconductor element is a semiconductor device. As another example, a device including a circuit including a semiconductor element is a semiconductor device.

  Mobile devices such as smartphones, tablets, and electronic books are widespread. Mobile devices are required to display suitable for the brightness of the environment used such as the outdoor environment and indoor environment. Furthermore, when reading an electronic book with an electronic book, a tablet, etc., it is required that it can be used for a long time.

  Low power consumption is achieved by displaying using reflected light in environments where there is sufficient external light, such as natural light or indoor lighting, and using light emitting elements in environments where sufficient brightness cannot be obtained. There has been proposed a display device that realizes the realization.

  For example, Patent Document 1 discloses a hybrid (composite type) display device in which a pixel circuit for controlling a liquid crystal element and a pixel circuit for controlling a light emitting element are provided in one pixel.

  For example, Patent Document 2 discloses that a display of a specific area is selectively updated by a decoder circuit in order to reduce power consumption of a mobile device.

  An oxide semiconductor has attracted attention as a semiconductor material applicable to a transistor. For example, Patent Document 3 discloses a technique for manufacturing a transistor using zinc oxide or an In—Ga—Zn-based oxide semiconductor as a metal oxide. A transistor including a metal oxide in a semiconductor layer is referred to as an OS transistor.

  The OS transistor has a very small off-state current. A technique for reducing the power consumption of a liquid crystal display or an organic EL display by utilizing this fact and reducing the frequency of refresh when displaying a still image is disclosed in Patent Document 4. In the present specification, the technique for reducing the power consumption of the display device described above is referred to as idling stop driving.

International Publication No. 2007/041150 JP 2011-085918 A JP 2007-123861 A JP 2011-141522 A

  As a method for performing display using external light, there is a reflective liquid crystal display device. A reflective liquid crystal display device does not require a backlight and thus consumes low power. However, good display cannot be achieved unless the place is where bright outside light can be obtained. Since the EL (Electroluminescence) element is a self-luminous element, the light-emitting display device can perform good display in a dark place. On the other hand, the brightness is fixed with respect to outside light in a bright place. There are challenges.

  Smartphones, tablets, electronic books, personal computers, and the like are often used in places where bright external light can be obtained. Among them, a mobile device used in a place where bright external light can be obtained, such as a smartphone and a tablet, is displayed with high luminance in order to improve visibility. Therefore, it is easy to consume electric power. Therefore, it is necessary to increase the capacity of the battery so that it can be used for a long time. However, when the capacity of the battery is increased, there is a problem that the mobile device becomes heavy.

  When using a smartphone, a tablet, an electronic book, or the like for a long time, it is necessary to reduce power consumption. As typical methods for controlling power consumption, there are control methods such as power gating and clock gating. In the case of a display device, methods such as reducing the number of display updates have been proposed. However, when the display update interval becomes longer, charge leakage occurs in the switch transistor that holds data. There is a problem in that the visibility is lowered because data held by charge leakage deteriorates and flickers.

  The display control is managed by a program, and the display is controlled by a control circuit and a display adapter. There is a problem that the number of program execution steps and the memory area for holding the program become large in order to switch the display method as appropriate according to the environment used, such as a smartphone, a tablet, an electronic book, and a personal computer. Further, an increase in the number of execution steps of the program has a problem that the responsiveness decreases with respect to display update. In addition, the increase in the memory area has a problem of increasing the circuit scale and consuming a large amount of power.

  In view of the above problems, an object of one embodiment of the present invention is to provide a display device with a novel structure. Another object of one embodiment of the present invention is to provide a display device that improves display visibility. Another object of one embodiment of the present invention is to provide an electronic device that reduces power consumption. Another object of one embodiment of the present invention is to provide an electronic device that improves display responsiveness by performing display update control using a program. Another object of one embodiment of the present invention is to provide an electronic device that reduces power consumption by performing display update control using a program.

  Note that the description of these problems does not disturb the existence of other problems. Note that one embodiment of the present invention does not have to solve all of these problems. Issues other than these will be apparent from the description of the specification, drawings, claims, etc., and other issues can be extracted from the descriptions of the specification, drawings, claims, etc. It is.

  Note that the problems of one embodiment of the present invention are not limited to the problems listed above. The problems listed above do not disturb the existence of other problems. Other issues are issues not mentioned in this section, which are described in the following description. Problems not mentioned in this item can be derived from descriptions of the specification or drawings by those skilled in the art, and can be appropriately extracted from these descriptions. Note that one embodiment of the present invention solves at least one of the above-described description and / or other problems.

  One embodiment of the present invention is an electronic device including a control unit, a display adapter, and a display unit. The control unit includes a memory, a wireless communication module, a GPS module, and a CPU. The adapter includes a first display controller, a second display controller, a first driver circuit, a second driver circuit, and a selection circuit. The display unit includes a first display area, a first display area, The display unit is electrically connected to the display adapter, the display adapter is electrically connected to the display unit, and the control unit includes a wireless communication module and a GPS module. The memory and the CPU are electrically connected, the control unit has a function of acquiring display information by the wireless communication module, and the control unit is a GPS module. Therefore, it has a function of acquiring position information, and the control unit has a function of assigning a flag for selecting and displaying the first display area and the second display area. The control unit has a function of generating the first display data provided, the control unit has a function of supplying the first display data to the display adapter, and the selection circuit uses the flag to display the first or second display. The display adapter is an electronic device having a function of selecting a controller, and a function of giving first display data to the display unit.

  In each of the above configurations, the memory included in the control unit stores a program, and the program uses the position information and the display information to generate first display data by performing arithmetic processing on the CPU. The program has a function of giving a plurality of conditions to the flag. The flag gives a function of causing the selection circuit to select the first display controller as the first flag condition. As a flag condition, a function for causing the selection circuit to select the second display controller is given, and as a third flag condition, a flag is given as a function for causing the selection circuit to select the first and second display controllers simultaneously. The program has a function of giving the first display data to the display adapter via the CPU. It is preferred.

  In each of the above configurations, the selection circuit included in the display adapter has a function of selecting the display controller based on the flag condition and driving the driver circuit. The selection circuit selects the first display controller based on the first flag condition. A function of selecting and updating the display of the first display area, and the selection circuit has a function of selecting the second display controller according to the second flag condition and updating the display of the first display area. And an electronic device having a function of selecting the first and second display controllers according to the third flag condition and simultaneously updating the display of the first and second display areas.

  In each of the above structures, the display portion includes a plurality of pixels, and each pixel includes a pixel circuit including a liquid crystal element and a pixel circuit including a light emitting element, and the first display region is displayed by the liquid crystal element. And has a function of displaying a second display area by a light-emitting element, and the pixel has the first display area arranged so as to surround the second display area. Equipment is preferred.

  In each of the above configurations, the program has a software development environment of source code, editor, compiler, debugger, or simulator, and the program gives a flag for selecting the display area to the condition parameter of the display area And an electronic control system having a function of updating the display of the first display area and the second display area by giving a flag to the display adapter via the CPU.

  Among the transistors included in the electronic devices having the above structures, the transistor is preferably an electronic device including a metal oxide in a semiconductor layer.

  In each of the above structures, the transistor including a metal oxide in a semiconductor layer preferably includes an electronic device having a back gate.

  One embodiment of the present invention can provide a display device having a novel structure. Alternatively, according to one embodiment of the present invention, a display device that can improve display visibility can be provided. Alternatively, according to one embodiment of the present invention, an electronic device that reduces power consumption can be provided. Alternatively, one embodiment of the present invention can provide an electronic device that improves display responsiveness by performing display update control using a program. Alternatively, according to one embodiment of the present invention, an electronic device that reduces power consumption by performing display update control using a program can be provided.

  Note that the effects of one embodiment of the present invention are not limited to the effects listed above. The effects listed above do not preclude the existence of other effects. The other effects are effects not mentioned in this item described in the following description. Effects not mentioned in this item can be derived from the description of the specification or drawings by those skilled in the art, and can be appropriately extracted from these descriptions. Note that one embodiment of the present invention has at least one of the above effects and / or other effects. Therefore, one embodiment of the present invention may not have the above-described effects depending on circumstances.

FIG. 11 is a block diagram illustrating an electronic device. (A): Display example of a display unit included in an electronic device. (B): Program description example for specifying a display area. (A): State transition diagram. (B): Detailed flowchart of (A). An example of a structure of a display device is shown. An example of a structure of a display device is shown. FIG. 10 illustrates a configuration example of a pixel of a display device. FIG. 10 illustrates a configuration example of a pixel of a display device. FIG. 10 illustrates a configuration example of a pixel of a display device. FIG. 10 illustrates a configuration example of a pixel of a display device. FIG. 14 illustrates an example of a cross-sectional structure of a display device. The figure which shows an example of the external appearance of a display apparatus. The figure which shows the example of a display module. The schematic diagram which shows the structural example of a touchscreen. (A): A flowchart showing an example of a method for manufacturing an electronic component. (B): Top view of the semiconductor wafer. (C): Partial enlarged view of FIG. (D): A schematic diagram showing a configuration example of a chip. (E): Perspective schematic view showing a configuration example of an electronic component. (A), (B), and (C): diagrams showing configuration examples of electronic devices. (A), (B), (C), (D), and (E) are diagrams showing configuration examples of electronic devices.

  Hereinafter, embodiments will be described with reference to the drawings. However, the embodiments can be implemented in many different modes, and it is easily understood by those skilled in the art that the modes and details can be variously changed without departing from the spirit and scope thereof. . Therefore, the present invention should not be construed as being limited to the description of the following embodiments.

  In the drawings, the size, the layer thickness, or the region is exaggerated for simplicity in some cases. Therefore, it is not necessarily limited to the scale. The drawings schematically show an ideal example, and are not limited to the shapes or values shown in the drawings.

  In addition, the ordinal numbers “first”, “second”, and “third” used in the present specification are attached to avoid confusion between components, and are not limited numerically. Appendices.

  In addition, in this specification, terms indicating arrangement such as “above” and “below” are used for convenience to describe the positional relationship between components with reference to the drawings. Moreover, the positional relationship between components changes suitably according to the direction which draws each structure. Therefore, the present invention is not limited to the words and phrases described in the specification, and can be appropriately rephrased depending on the situation.

  In this specification and the like, a transistor is an element having at least three terminals including a gate, a drain, and a source. A channel region is provided between the drain (drain terminal, drain region or drain electrode) and the source (source terminal, source region or source electrode), and a current flows through the drain, channel region, and source. It is something that can be done. Note that in this specification and the like, a channel region refers to a region through which a current mainly flows.

  In addition, the functions of the source and drain may be switched when transistors having different polarities are employed or when the direction of current changes during circuit operation. Therefore, in this specification and the like, the terms source and drain can be used interchangeably.

  In addition, in this specification and the like, “electrically connected” includes a case of being connected via “thing having some electric action”. Here, the “thing having some electric action” is not particularly limited as long as it can exchange electric signals between connection targets. For example, “thing having some electric action” includes electrodes, wiring, switching elements such as transistors, resistance elements, inductors, capacitors, and other elements having various functions.

  Further, in this specification and the like, “parallel” means a state in which two straight lines are arranged at an angle of −10 ° to 10 °. Therefore, the case of −5 ° to 5 ° is also included. “Vertical” refers to a state in which two straight lines are arranged at an angle of 80 ° to 100 °. Therefore, the case of 85 ° to 95 ° is also included.

  In this specification and the like, the terms “film” and “layer” can be interchanged with each other. For example, the term “conductive layer” may be changed to the term “conductive film”. Alternatively, for example, the term “insulating film” may be changed to the term “insulating layer”.

  In this specification and the like, unless otherwise specified, off-state current refers to drain current when a transistor is off (also referred to as a non-conduction state or a cutoff state). The off state is a state where the voltage Vgs between the gate and the source is lower than the threshold voltage Vth in the n-channel transistor, and the voltage Vgs between the gate and the source in the p-channel transistor unless otherwise specified. Is higher than the threshold voltage Vth. For example, the off-state current of an n-channel transistor sometimes refers to a drain current when the voltage Vgs between the gate and the source is lower than the threshold voltage Vth.

  The off-state current of the transistor may depend on Vgs. Therefore, the off-state current of the transistor being I or less sometimes means that there is a value of Vgs at which the off-state current of the transistor is I or less. The off-state current of a transistor may refer to an off-state current in an off state at a predetermined Vgs, an off state in a Vgs within a predetermined range, or an off state in Vgs at which a sufficiently reduced off current is obtained.

As an example, when the threshold voltage Vth is 0.5 V, the drain current when Vgs is 0.5 V is 1 × 10 ⁻⁹ A, and the drain current when Vgs is 0.1 V is 1 × 10 ⁻¹³ A. Assume that the n-channel transistor has a drain current of 1 × 10 ⁻¹⁹ A when Vgs is −0.5 V and a drain current of 1 × 10 ⁻²² A when Vgs is −0.8 V. Since the drain current of the transistor is 1 × 10 ⁻¹⁹ A or less when Vgs is −0.5 V or Vgs is in the range of −0.5 V to −0.8 V, the off-state current of the transistor is 1 It may be said that it is below ^x10 <^-19> A. Since there is Vgs at which the drain current of the transistor is 1 × 10 ⁻²² A or less, the off-state current of the transistor may be 1 × 10 ⁻²² A or less.

  In this specification and the like, the off-state current of a transistor having a channel width W may be represented by a current value flowing around the channel width W. In some cases, the current value flows around a predetermined channel width (for example, 1 μm). In the latter case, the unit of off-current may be represented by a unit having a current / length dimension (for example, A / μm).

  The off-state current of a transistor may depend on temperature. In this specification, off-state current may represent off-state current at room temperature, 60 ° C., 85 ° C., 95 ° C., or 125 ° C. unless otherwise specified. Alternatively, at a temperature at which reliability of the semiconductor device including the transistor is guaranteed or a temperature at which the semiconductor device including the transistor is used (for example, any one temperature of 5 ° C. to 35 ° C.). May represent off-state current. The off-state current of a transistor is I or less means that room temperature, 60 ° C., 85 ° C., 95 ° C., 125 ° C., a temperature at which the reliability of the semiconductor device including the transistor is guaranteed, or the transistor is included. There may be a case where there is a value of Vgs at which the off-state current of the transistor is equal to or lower than I at a temperature (for example, any one of 5 ° C. to 35 ° C.) at which the semiconductor device or the like is used.

  The off-state current of the transistor may depend on the voltage Vds between the drain and the source. In this specification, the off-state current is Vds of 0.1V, 0.8V, 1V, 1.2V, 1.8V, 2.5V, 3V, 3.3V, 10V, 12V, 16V unless otherwise specified. Or an off-current at 20V. Alternatively, Vds in which reliability of a semiconductor device or the like including the transistor is guaranteed, or an off-current in Vds used in the semiconductor device or the like including the transistor may be represented. The off-state current of the transistor is equal to or less than I. Vds is 0.1V, 0.8V, 1V, 1.2V, 1.8V, 2.5V, 3V, 3.3V, 10V, 12V, 16V, 20V There is a value of Vgs at which the off-state current of the transistor in Vds at which the reliability of the semiconductor device including the transistor is guaranteed or Vds used in the semiconductor device including the transistor is equal to or less than I. May be pointed to.

  In the description of the off-state current, the drain may be read as the source. That is, the off-state current sometimes refers to a current that flows through the source when the transistor is off.

  In this specification and the like, the term “leakage current” may be used in the same meaning as off-state current. In this specification and the like, off-state current may refer to current that flows between a source and a drain when a transistor is off, for example.

  The voltage refers to a potential difference between two points, and the potential refers to electrostatic energy (electric potential energy) possessed by a unit charge in an electrostatic field at a certain point. However, generally, a potential difference between a potential at a certain point and a reference potential (for example, ground potential) is simply referred to as a potential or a voltage, and the potential and the voltage are often used as synonyms. Therefore, in this specification, unless otherwise specified, the potential may be read as a voltage, or the voltage may be read as a potential.

(Embodiment 1)
In this embodiment, an electronic control system having a function of switching display areas by giving a parameter for selecting a display area in a display device having two display areas will be described with reference to FIGS.

  FIG. 1 shows a block diagram of the electronic device 10. The electronic device 10 includes a control unit 100, a display adapter 110, and a display device 200. The control unit 100 includes a CPU 101, a memory 102, a wireless communication module 103, a GPS module 104, a touch panel controller 105, and an imaging module 106.

  The display adapter 110 includes a first display controller 111, a second display controller 112, a first driver 111A, a second driver 112A, and a selection circuit 113.

  The display device 200 includes a first display area 121, a second display area 122, and a touch panel 123.

  The CPU 101 is electrically connected to the memory 102, the wireless communication module 103, the GPS module 104, the touch panel controller 105, and the imaging module 106. Further, the CPU 101 is also electrically connected to the display adapter 110.

  In the display adapter 110, a selection circuit 113, a first display controller 111, and a second display controller 112 are electrically connected. The first display controller 111 is electrically connected to the first display area 121 of the display device 200 via the first driver 111A. The second display controller 112 is electrically connected to the second display area 122 of the display device 200 via the second driver 112A.

  A touch panel 123 included in the display device 200 is electrically connected to the CPU 101 via a touch panel controller 105 included in the control unit 100.

  The display device 200 includes two display areas, the first display area 121 includes a plurality of pixels that perform display using a light-emitting element, and the second display area 122 includes a plurality of pixels that perform display using a liquid crystal element. doing. The pixels in the second display region 122 have a highly reflective metal film on the pixel electrode, and display by controlling gradation by reflecting external light from the pixel electrode. A structure in which a liquid crystal element included in a pixel is displayed using reflected light is a reflective liquid crystal structure.

  The light-emitting element is a light-emitting element having a pixel electrode, a counter electrode, and an organic compound layer sandwiched between them. The pixel electrode is either an anode or a cathode, and the counter electrode is either the anode or the cathode. The organic compound layer includes a light emitting layer.

  The pixel circuit is described in detail with reference to FIGS. 6A and 6B, and the pixel circuit that displays the second display region 122 includes a transistor 303, a capacitor 304, and a liquid crystal element 301. The gradation data is written to the capacitor 304 included in the pixel circuit with a voltage. The capacitor 304 generates a voltage by holding the gradation signal as a charge. The gradation is controlled by applying the generated voltage to the liquid crystal element.

  However, the charge held in the capacitor 304 changes in grayscale due to fluctuations in voltage applied to the liquid crystal element due to off-state current of the transistor 303, leakage due to resistance of the liquid crystal element (hereinafter referred to as leakage), and the like. To do. If the voltage of the capacitor 304 fluctuates within the interval at which the display is updated, the gradation also fluctuates and flicker called flicker occurs.

  Note that as a method for reducing leakage, a transistor with extremely low off-state current can be used. As a transistor with extremely small off-state current, a transistor formed using a semiconductor having a wider band gap than silicon can be used. As a semiconductor having a wider band gap than silicon, there is a compound semiconductor, such as a metal oxide.

  For example, when a transistor including a metal oxide is used for a semiconductor layer, the off-state current of the transistor 303 can be reduced, and the above-described idling stop driving can be performed. Note that an example of an oxide semiconductor will be described in detail in Embodiment 6.

  For example, a transistor in which crystalline silicon is used for a semiconductor layer in which a channel is formed (also referred to as a “crystalline Si transistor”) can easily obtain relatively higher mobility than an OS transistor. On the other hand, a crystalline Si transistor is difficult to realize an extremely small off-state current like an OS transistor. Therefore, it is important that the semiconductor material used for the semiconductor layer is properly used depending on the purpose and application.

  If the change in voltage due to leakage of charge held in the capacitor 304 is small, the amount of change in gradation is small, so that the influence of visibility can be reduced. Therefore, when the display update interval is short, voltage fluctuation due to leakage or the like can be suppressed to a small level, and display quality can be maintained. However, when the display update interval is increased in order to reduce power consumption, the amount of voltage fluctuation due to leakage increases and flickering occurs.

  The occurrence of flicker can be improved by suppressing voltage fluctuation caused by leakage of charge held in the capacitor 304. The off-state current of the transistor can be reduced by using the OS transistor. However, it is necessary to improve other leaks such as a leak due to the resistance of the liquid crystal element.

  The CPU 101 included in the control unit 100 has a function of receiving position information from the GPS module 104, a function of receiving display information from the wireless communication module 103, and a function of receiving image information acquired from the image pickup module 106. And has a function of receiving contact information from the touch panel controller 105 to the display unit as touch coordinates.

  The memory 102 stores a program for controlling display. The program has a function of collecting information from the wireless communication module 103, the GPS module 104, the touch panel controller 105, the imaging module 106, and the like via the CPU 101 and generating first display data of the display device 200. . Therefore, the program has a function of giving the first display data to the display adapter 110 via the CPU 101. Further, it has a function of giving a flag for selecting and displaying the first display area 121 or the second display area 122.

  The display adapter 110 has a function of selecting the first display controller 111 or the second display controller 112 by switching the selection circuit 113 according to the flag information given to the first display data. The first display controller 111 or the second display controller 112 selected by the flag information can control the driver to update the display. The flag information has a status for updating the first display area 121, a status for updating the second display area 122, and a status for updating the first display area 121 and the second display area 122. May be.

  FIG. 2A illustrates an example in which display is performed in the first display area 121 and the second display area 122 included in the display device 200 in FIG. The first display is shown as 200A, and the second display is shown as 200B. In the example shown by the display device 200, the user's position information is acquired from the GPS module 104, the two-dimensional or three-dimensional map information corresponding to the position information is acquired from the wireless communication module 103, and the map information is displayed. It is one of the applications that display the current location of the user. Furthermore, the application can display a virtual object generated by a random number or the like as an item on the map information. The application shown in the example will be described as a game in which items that are randomly generated on the displayed map are collected by the user actually moving to the position of the item.

  The first display 200A has three display ranges. The display range divided by the display unit will be described as a display component. The display component 141 displays antenna strength, time, remaining battery capacity, and the like for wireless communication.

  The display component 143 displays the name of the user, the game level of the user, a display button 163 for acquiring the object on which the user is displayed as an item, and a display button 164 relating to game settings and acquired items. .

  The display component 141 and the display component 143 change little during the execution of the application. Therefore, it is desirable to update the display when the content of the display is changed. Therefore, it is desirable that the display component 141 and the display component 143 be displayed by a liquid crystal element included in the second display region 122.

  Furthermore, when executing an application as shown in the present embodiment, it is often an environment where bright outside light can be obtained. Therefore, the reflective display element in the second display area 122 functions effectively for display using external light. Therefore, power consumption can be reduced, and sufficient visibility can be obtained even under bright external light.

  The display component 142 generates first display data from the map information and the position information. In the map information, a symbol 162 indicating the current position of the user and an item 161 indicated by an object generated by a random number are added to the map information and displayed. The user can actually move while confirming the displayed map information and the symbol 162 and move to the position of the displayed item 161 to collect the item 161 as an item in the game. .

  When the position of the item 161 and the current position of the user indicated by the position of the GPS module 104 are overlapped on the display, the item 161 is stored in the memory as item data in the application database by touching the display button 163. Can do.

  In order to further improve the game performance, when the position of the displayed object overlaps with the position of the GPS module 104, the imaging module 106 is activated to perform imaging, thereby displaying imaging data on the display component 142. It has a function that can. In order to acquire the item 161, it can set so that the object may be clicked or acquired by the length of the flick. The setting may be changed according to the type of the item 161. User operations are detected by the touch panel 123 and processed by the CPU via the touch panel controller 105.

  The CPU 101 performs a process of adding an object to the imaging data, so that the first display is synthesized as if the item 161 exists on a road or a tree bush from a game in which the item 161 is acquired on the map. Data can be created. The object combined with the imaging data may have display contents different from the item 161.

  The display component 142 is required to be highly responsive to the actual movement and behavior of the user for updating the display. Therefore, it is desirable to display using the EL element included in the first display region 121.

  In the second display 200B, the display component 142 is further divided into three display ranges. The display component 151 can display the display component 142 in a reduced size. The display scale may be determined by the application or may be determined by the user. In addition, a display scale for reduction and enlargement may be determined by pinching in or pinching out using a touch panel. Further, the display component 142 may have the same function as the display component 151.

  The display component 152 is an example in which the acquired item is displayed. As an example, as many display areas 172 as the number of acquired items are displayed on the display component 152 in an array. This is an example in which a maximum of six items are displayed.

  However, it is not preferable to set an upper limit on the acquired items in order to improve game characteristics. However, it may be difficult for the area of the display component 152 to secure a sufficient area for displaying the acquired item. Therefore, the display contents may be scrolled and updated sequentially by reducing the item display scale or by flicking in the area of the display component 152. The flick operation is detected by the touch panel 123, and information is given to the CPU 101 via the touch panel controller 105, so that the touch operation and the touch type can be detected.

  In the display component 153, a setting item display area 171 is displayed as a plurality of items. Accordingly, the display component 152 and the display component 153 are not required to have high responsiveness for display update. Therefore, as with the display component 141 and the display component 143, it is desirable to display using the liquid crystal element included in the second display region 122.

  FIG. 2B explains a method for managing the display shown in FIG. The program has a function of managing the display area with various parameters when designing the screen of the display unit. FIG. 2B shows a method of setting a display area to be managed as a display component as an example.

  In order to set a display component, position information that is a starting point of the display component and range information that indicates a display range of the display component can be given to the display adapter 110 via the CPU 101. In the example of the program shown in FIG. 2B, position information that is the starting point of the display component can be given as Location. The location can be managed by giving a first parameter x coordinate, a second parameter y coordinate, and two parameters representing the coordinates of the display unit.

  Further, the range information of the display component can be given as Size. Size can be given a width in the x direction and a width in the y direction starting from the coordinates (x, y) given by Location. The position information and range information of the display component can be specified by the parameters of Location and Size.

  The display components of the first display 200A and the second display 200B in FIG. 2A can be managed by the program in FIG. If it is an electronic device that displays in either the first display area 121 or the second display area 121 of the display unit, it is specified by giving the parameters of Location and Size to the display adapter 110 via the CPU 101. Display components can be selectively updated. The coordinates (x, y) in FIG. 2C are, for example, coordinates and sizes when the x-axis and y-axis are configured with the upper left of Full-HD (1920 × 1080) as the origin. Therefore, x and y can be expressed by coordinates set as positive numbers according to the maximum range specified by Size and by Size.

  In this embodiment, the display unit that optimizes display visibility and power consumption reduction includes a first display area 121 and a second display area 122. Therefore, when the display is shifted from the first display 200A to the second display 200B, the second display component 142 is divided into the display component 151, the display component 152, and the display component 153, and further the first display area. The display can be shifted from 121 to the second display area 122.

  The program can add a third parameter to the location information of the location in order to move the display area from the first display area 121 to the second display area 122. The third parameter can have multiple statuses.

  FIG. 2B shows an example of the status. The first status has a function of selecting the first display area 121 and causing the selection circuit 113 included in the display adapter 110 to update the display of the first display area 121. The second status has a function in which the selection circuit 113 updates the display of the second display area 122. The third status has a function of updating the display of both the first display area 121 and the second display area 122.

  Therefore, by assigning the third parameter for selecting the display area of the first display area 121 and the second display area 122, the program can selectively update the display unit, and the user can The display can be changed according to the surrounding environment, the remaining battery level, and the like.

  The program has a third parameter for designating a display area. In the source code at the time of program development, the third parameter can be assigned for each display component. The source code is converted into a machine language program (assembler language) that can be interpreted by the CPU 101 by the compiler, the program is stored in the memory 102, and the first display data including the third parameter is converted to the display adapter via the CPU 101. 110. The display adapter 110 can update the display area by switching the selection circuit according to the third parameter.

  Although an example in which the third parameter is added to the location information of the location has been shown, the third parameter is not limited to the location information of the location. It may be given to the size range information or may be another parameter. Alternatively, independent parameters may be used.

  FIG. 3A is a state transition diagram showing that the display of the first display 200A and the second display 200B of FIG. The display can be switched alternately by touching or flicking the display button 164 and the button display 173 provided in the display area of the display component 143.

  FIG. 3B shows a detailed flowchart of FIG. The display components 141, 143, 152, and 153 are displayed by the second display area 122, and the display components 142 and 151 are displayed by the first display area 121.

  Step F01 indicates that the touch panel 123 has detected a click or flick in FIG. 3A within the range of the display button 164 or 173. Therefore, when the first display 200A is being displayed, the display can be shifted to the second display 200B, and when the second display 200B is being displayed, the display can be shifted to the first display 200A.

  In step F02, the CPU 101 can read the register from the wireless communication module 103, the GPS module 104, the touch panel controller 105, the imaging module 106, and the like displayed in the second display area 122.

  In step F03, it is detected by a program whether parameters such as antenna strength, current time, and remaining battery capacity for wireless communication have been updated in comparison with the values of the registers read in step F02. Can do.

  Step F04 can update the display of the second display area 122 with new information when a change in the parameter is detected.

  In step F05, data to be displayed on the display component 142 or the display component 151 can be acquired from the wireless communication module 103, the GPS module 104, or the like.

  In step F06, the first display data can be created from the data acquired from the wireless communication module 103 and the GPS module 104 by adding the user's position information and object information to the map information.

  In step F07, the first display data can be displayed in the first display area 121 by adding the user's position information, object information, etc. to the map information.

  In step F08, it is possible to determine whether the touch panel 123 has detected a click or flick within the range of the display buttons 164 or 173 during the process from F02 to F07. If a click or flick has been detected, the process returns to step F01 to switch between the first display 200A and the second display 200B. However, the detection result of the touch panel may process an interrupt in real time. In that case, the determination in step F08 may be skipped.

  In step F09, a period during which the second display area 122 is updated is monitored by a timer. The CPU 101 has a timer monitoring function, and the program can hold the time t1 when the process proceeds from the previous step F09 to F02. The time t0 when the program executes step F09 and the difference are detected. If t0-t1> b, t0 is substituted for t1, and the process returns to step F02 to repeat the process. If t0-t1 <b, the process proceeds to step F10.

  The timer monitoring period is preferably set to a period greater than 16 ms and less than 1 second. However, if the display update interval is long, the power consumed for display update can be reduced, so it may be longer than 1 second. The timer monitoring period can be set by the user.

  In step F10, a period during which the first display area 121 is updated is monitored by a timer. In the program, the time t2 when the process proceeds from the previous step F10 to F05 can be held. The time t0 when the program executes step F10 and the difference are detected. If t0-t2> a, t0 is substituted for t2, and the process returns to step F05 to repeat the process. If t0-t2 <a, the process can be waited until t0-t2> a. Alternatively, the process may return to step F01 without waiting.

  The timer monitoring period of step F10 may be changed according to the responsiveness of the display content of the first display area 121. Then, the process returns to step F05 to repeat the process. When the user moves fast, the monitoring period may be set short, and when the user moves slowly, the monitoring period may be lengthened. A plurality of detection periods may be set by the user. It is desirable because the power consumed can be reduced according to the movement of the user. The moving speed of the user can be detected by the GPS module 104.

  By adding the third parameter from the program, the visibility of the first display area 121 and the second display area 122 can be increased according to the user's environment. In addition, by changing the update period of the display area according to the user's operation, the position of the user can be correctly reflected in the first display data. In addition, by selectively selecting the display range of the display component and optimizing the update cycle, it is possible to reduce power consumption.

  The structures and methods described in this embodiment can be combined as appropriate with any of the structures and methods described in the other embodiments.

(Embodiment 2)
In this embodiment, a structural example of a display device using a reflective display element and a light-emitting display element will be described. Note that in this embodiment, a structure example of a display device is described using a case where a liquid crystal element is used as a reflective display element and a light-emitting element using an EL material is used as a light-emitting display element.

  FIG. 4A illustrates an example of a cross-sectional structure of the display device 200 according to one embodiment of the present invention. A display device 200 illustrated in FIG. 4A controls a light-emitting element 203, a liquid crystal element 204, a transistor 205 having a function of controlling supply of current to the light-emitting element 203, and supply of voltage to the liquid crystal element 204. A transistor 206 having the function of: The light-emitting element 203, the liquid crystal element 204, the transistor 205, and the transistor 206 are located between the substrate 201 and the substrate 202.

  In the display device 200, the liquid crystal element 204 includes a pixel electrode 207, a common electrode 208, and a liquid crystal layer 209. The pixel electrode 207 is electrically connected to the transistor 206. Then, the orientation of the liquid crystal layer 209 is controlled according to the voltage applied between the pixel electrode 207 and the common electrode 208. Note that FIG. 4A illustrates the case where the pixel electrode 207 has a function of reflecting visible light and the common electrode 208 has a function of transmitting visible light, and light incident from the substrate 202 side is illustrated. As indicated by a white arrow, the light is reflected from the pixel electrode 207 and is emitted again from the substrate 202 side.

  The light emitting element 203 is electrically connected to the transistor 205. Light emitted from the light emitting element 203 is emitted to the substrate 202 side. Note that FIG. 4A illustrates the case where the pixel electrode 207 has a function of reflecting visible light and the common electrode 208 has a function of transmitting visible light; thus, light emitted from the light-emitting element 203 is illustrated. Passes through a region that does not overlap with the pixel electrode 207 as indicated by a white arrow, passes through a region where the common electrode 208 is located, and is emitted from the substrate 202 side.

  4A, the transistor 205 and the transistor 206 are located in the same layer 210. The layer 210 including the transistor 205 and the transistor 206 includes the liquid crystal element 204 and the light-emitting element. It has a region between 203. Note that at least when the semiconductor layer included in the transistor 205 and the semiconductor layer included in the transistor 206 are located on the same insulating surface, it can be said that the transistor 205 and the transistor 206 are included in the same layer 210. .

  With the above structure, the transistor 205 and the transistor 206 can be manufactured through a common manufacturing process.

  Next, FIG. 4B illustrates an example of a cross-sectional structure of another structure of the display device 200 of one embodiment of the present invention. The display device 200 illustrated in FIG. 4B is different from the display device 200 illustrated in FIG. 4A in that the transistor 205 and the transistor 206 are included in different layers.

  Specifically, the display device 200 illustrated in FIG. 4B includes a layer 210a including the transistor 205 and a layer 210b including the transistor 206. The layer 210a and the layer 210b each emit light from the liquid crystal element 204. A region between the elements 203 is included. In the display device 200 illustrated in FIG. 4B, the layer 210a is closer to the light-emitting element 203 side than the layer 210b. Note that at least when the semiconductor layer included in the transistor 205 and the semiconductor layer included in the transistor 206 are located on different insulating surfaces, it can be said that the transistor 205 and the transistor 206 are included in different layers.

  With the above structure, the transistor 205 and various wirings electrically connected to the transistor 205 can be partially overlapped with the transistor 206 and various wirings electrically connected to the transistor 206, so that the pixel The size of the display device 200 can be kept small, and high definition of the display device 200 can be realized.

  Next, FIG. 5A illustrates a cross-sectional structure as an example of another structure of the display device 200 according to one embodiment of the present invention. The display device 200 illustrated in FIG. 5A is different from the display device 200 illustrated in FIG. 4A in that the transistor 205 and the transistor 206 are included in different layers. The display device 200 illustrated in FIG. 5A is different from the display device 200 illustrated in FIG. 4B in that the layer 210a including the transistor 205 is closer to the substrate 201 than the light-emitting element 203 is. .

  Specifically, the display device 200 illustrated in FIG. 5A includes a layer 210 a including the transistor 205 and a layer 210 b including the transistor 206. The layer 210 a has a region between the light emitting element 203 and the substrate 201. The layer 210 b includes a region between the liquid crystal element 204 and the light emitting element 203.

  With the above structure, the transistor 205 and various wirings electrically connected to the transistor 205 are connected to each other, and the transistor 206 and various wirings electrically connected to the transistor 206 are more connected than in the case of FIG. Since many pixels can be overlapped, the size of the pixel can be reduced and high definition of the display device 200 can be realized.

  Next, FIG. 5B illustrates an example of a cross-sectional structure of another structure of the display device 200 according to one embodiment of the present invention. The display device 200 illustrated in FIG. 5B has the same structure as the display device 200 illustrated in FIG. 4A in that the transistor 205 and the transistor 206 are included in the same layer. However, the display device 200 illustrated in FIG. 5B is different from the display device illustrated in FIG. 4A in that a layer including the transistor 205 and the transistor 206 is closer to the substrate 201 than the light-emitting element 203. 200 and the configuration is different.

  Specifically, the display device 200 illustrated in FIG. 5B includes the layer 210 including the transistor 205 and the transistor 206. The layer 210 has a region between the light emitting element 203 and the substrate 201. Further, the liquid crystal element 204 is closer to the substrate 202 side than the light emitting element 203.

  With the above structure, the transistor 205 and the transistor 206 can be manufactured through a common manufacturing process. In addition, the wiring for electrically connecting the liquid crystal element 204 and the transistor 206 and the wiring for electrically connecting the light-emitting element 203 and the transistor 205 may be provided on the same side with respect to the layer 210. Specifically, a wiring for electrically connecting the liquid crystal element 204 and the transistor 206 can be formed over the semiconductor layer of the transistor 206 and the light-emitting element 203 and the transistor 205 are electrically connected. A wiring can be formed over the semiconductor layer of the transistor 205. Accordingly, the manufacturing process can be simplified as compared with the case of the display device 200 illustrated in FIG.

  Note that FIGS. 4 and 5 illustrate cross-sectional structures in which one light-emitting element 203 corresponds to two liquid crystal elements 204; however, the display device according to one embodiment of the present invention includes one liquid crystal element. It may have a cross-sectional structure in which one light-emitting element 203 corresponds to the element 204, or a cross-sectional structure in which a plurality of light-emitting elements 203 correspond to one liquid crystal element 204. May be.

  4 and 5 illustrate the case where the pixel electrode 207 included in the liquid crystal element 204 has a function of reflecting visible light, the pixel electrode 207 has a function of transmitting visible light. Also good. In this case, a light source such as a backlight or a front light may be provided in the display device 200, or the light emitting element 203 may be used as a light source when an image is displayed using the liquid crystal element 204.

  This embodiment can be implemented in appropriate combination with any of the other embodiments.

(Embodiment 3)
In this embodiment, a structural example of a pixel included in a display device using a reflective display element and a light-emitting display element will be described. Note that in this embodiment, the structure of the pixel 300 according to one embodiment of the present invention is described using the case where a liquid crystal element is used as a reflective display element and a light-emitting element using an EL material is used as a light-emitting display element. An example will be described.

  A pixel 300 illustrated in FIG. 6A includes a pixel 350 and a pixel 351. The pixel 350 includes a liquid crystal element 301, and the pixel 351 includes a light emitting element 302.

  Specifically, the pixel 350 includes a liquid crystal element 301, a transistor 303 having a function of controlling voltage applied to the liquid crystal element 301, and a capacitor 304. In the transistor 303, the gate is electrically connected to the wiring GL, one of the source and the drain is electrically connected to the wiring SL, and the other of the source and the drain is electrically connected to the pixel electrode of the liquid crystal element 301. ing. The common electrode of the liquid crystal element 301 is electrically connected to a wiring or an electrode to which a predetermined potential is supplied. In the capacitor 304, one electrode is electrically connected to the pixel electrode of the liquid crystal element 301, and the other electrode is electrically connected to a wiring or an electrode to which a predetermined potential is supplied.

  Specifically, the pixel 351 includes a light-emitting element 302, a transistor 305 having a function of controlling current supplied to the light-emitting element 302, and a transistor 306 having a function of controlling supply of a potential to the gate of the transistor 305. And a capacitor 307. The gate of the transistor 306 is electrically connected to the wiring GE, one of the source and the drain is electrically connected to the wiring DL, and the other of the source and the drain is electrically connected to the gate of the transistor 305. . In the transistor 305, one of a source and a drain is electrically connected to the wiring AL, and the other of the source and the drain is electrically connected to the light-emitting element 302. In the capacitor 307, one electrode is electrically connected to the wiring AL and the other electrode is electrically connected to the gate of the transistor 305.

  In the pixel 300 illustrated in FIG. 6A, an image signal corresponding to the liquid crystal element 301 is supplied to the wiring SL, and an image signal corresponding to the light-emitting element 302 is supplied to the wiring DL, so that the pixel 300 is displayed. The gradation and the gradation displayed by the light emitting element 302 can be individually controlled.

  Note that FIG. 6A illustrates a configuration example of the pixel 300 including one pixel 350 including the liquid crystal element 301 and one pixel 351 including the light-emitting element 302; however, the pixel 300 includes a plurality of pixels 350. Alternatively, the pixel 300 may include a plurality of pixels 351.

  FIG. 6B illustrates a configuration example of the pixel 300 in the case where the pixel 300 includes one pixel 351 and four pixels 351.

  Specifically, a pixel 300 illustrated in FIG. 6B includes a pixel 351 including a liquid crystal element 301 and pixels 351 a to 351 d each including a light-emitting element 302.

  The structure of the pixel 350 illustrated in FIG. 6A can be referred to for the structure of the pixel 350 illustrated in FIG.

  6B includes a light-emitting element 302 and a transistor 305 having a function of controlling current supplied to the light-emitting element 302, similarly to the pixel 351 illustrated in FIG. 6A. The transistor 306 has a function of controlling the supply of potential to the gate of the transistor 305, and the capacitor 307. The light emitted from the light emitting element 302 included in each of the pixels 351a to 351d has wavelengths in different regions, so that a color image can be displayed on the display device.

  In the pixels 351a to 351d illustrated in FIG. 6B, the gate of the transistor 306 included in the pixel 351a and the gate of the transistor 306 included in the pixel 351c are electrically connected to the wiring GEb. In addition, the gate of the transistor 306 included in the pixel 351b and the gate of the transistor 306 included in the pixel 351d are electrically connected to the wiring GEa.

  6B, one of a source and a drain of the transistor 306 included in the pixel 351a and one of a source and a drain of the transistor 306 included in the pixel 351b are electrically connected to the wiring DLa. It is connected to the. In addition, one of a source and a drain of the transistor 306 included in the pixel 351c and one of a source and a drain of the transistor 306 included in the pixel 351d are electrically connected to the wiring DLb.

  In addition, in the pixels 351a to 351d illustrated in FIG. 6B, one of the sources and drains of all the transistors 305 is electrically connected to the wiring AL.

  As described above, in the pixels 351a to 351b illustrated in FIG. 6B, the pixel 351a and the pixel 351c share the wiring GEb, and the pixel 351b and the pixel 351d share the wiring GEa, but the pixel 351a to pixel All of 351b may share one wiring GE. In this case, it is preferable that the pixels 351a to 351b be electrically connected to four different wirings DL.

  Next, FIG. 7A illustrates a configuration example of the pixel 300 which is different from that in FIG. A pixel 300 illustrated in FIG. 7A is different from the pixel 300 illustrated in FIG. 6A in that the transistor 305 included in the pixel 351 includes a back gate.

  Specifically, in the pixel 300 illustrated in FIG. 7A, the back gate of the transistor 305 is electrically connected to the gate (front gate). With the above structure, the pixel 300 illustrated in FIG. 7A can suppress shift of the threshold voltage of the transistor 305, so that reliability of the transistor 305 can be increased. In addition, the pixel 300 illustrated in FIG. 7A can have the above structure, whereby the on-state current of the transistor 305 can be increased while the size of the transistor 305 is reduced.

  Note that in the display device according to one embodiment of the present invention, the pixel 300 may include a plurality of pixels 350 illustrated in FIG. 7A or a plurality of pixels 351 illustrated in FIG. May be. Specifically, the pixel 300 illustrated in FIG. 7A and the four pixels 351 may be included as in the pixel 300 illustrated in FIG. In that case, the connection relationship between the various wirings and the four pixels 351 can refer to the pixel 300 illustrated in FIG.

  Next, FIG. 7B illustrates a configuration example of the pixel 300 which is different from that in FIG. A pixel 300 illustrated in FIG. 7B is different from the pixel 300 illustrated in FIG. 6A in that the transistor 305 included in the pixel 351 includes a back gate. 7B is different from the pixel 300 in FIG. 7A in that the back gate of the transistor 305 is electrically connected to the light-emitting element 302 instead of the gate.

  With the above structure, the pixel 300 illustrated in FIG. 7B can suppress shift of the threshold voltage of the transistor 305 and can increase the reliability of the transistor 305.

  Note that in the display device according to one embodiment of the present invention, the pixel 300 may include a plurality of pixels 350 illustrated in FIG. 7B or a plurality of pixels 351 illustrated in FIG. May be. Specifically, similarly to the pixel 300 illustrated in FIG. 6B, the pixel 350 illustrated in FIG. 7B and the four pixels 351 may be included. In that case, the connection relationship between the various wirings and the four pixels 351 can refer to the pixel 300 illustrated in FIG.

  Next, FIG. 8 illustrates a configuration example of the pixel 300 which is different from that in FIG. A pixel 300 illustrated in FIG. 8 includes a pixel 350 and a pixel 351, and the structure of the pixel 351 is different from that in FIG.

  Specifically, a pixel 351 illustrated in FIG. 8 includes a light-emitting element 302, a transistor 305 having a function of controlling current supplied to the light-emitting element 302, and a transistor having a function of controlling supply of a potential to the gate of the transistor 305. 306, a transistor 308 having a function of supplying a predetermined potential to the pixel electrode of the light-emitting element 302, and a capacitor 307. In addition, the transistor 305, the transistor 306, and the transistor 308 each have a back gate.

The transistor 306 has a gate (front gate) electrically connected to the wiring ML, a back gate electrically connected to the wiring GE, and one of a source and a drain electrically connected to the wiring DL, The other of the drains is electrically connected to the gate and front gate of the transistor 305. In the transistor 305, one of a source and a drain is electrically connected to the wiring AL, and the other of the source and the drain is electrically connected to the light-emitting element 302.
In the transistor 308, a gate (front gate) is electrically connected to the wiring ML, a back gate is electrically connected to the wiring GE, and one of a source and a drain is electrically connected to the wiring ML, and The other is electrically connected to the light emitting element 302. In the capacitor 307, one electrode is electrically connected to the wiring AL and the other electrode is electrically connected to the gate of the transistor 305.

  Note that although FIG. 8 illustrates a configuration example of the pixel 300 including one pixel 350 including the liquid crystal element 301 and one pixel 351 including the light-emitting element 302, the pixel 300 includes a plurality of pixels 350. Alternatively, the pixel 300 may include a plurality of pixels 351.

  FIG. 9 illustrates a configuration example of the pixel 300 in the case where the pixel 300 includes one pixel 351 and four pixels 351.

  Specifically, a pixel 300 illustrated in FIG. 9 includes a pixel 351 including a liquid crystal element 301 and pixels 351 a to 351 b each including a light-emitting element 302.

  For the structure of the pixel 350 illustrated in FIG. 9, the structure of the pixel 350 illustrated in FIG. 8 can be referred to.

  9A to 9D, similarly to the pixel 351 illustrated in FIG. 8, the light-emitting element 302, the transistor 305 having a function of controlling current supplied to the light-emitting element 302, and the gate of the transistor 305 A transistor 306 having a function of controlling the supply of the potential of the light-emitting element, a transistor 308 having a function of supplying a predetermined potential to the pixel electrode of the light-emitting element 302, and a capacitor 307. The light emitted from the light emitting element 302 included in each of the pixels 351a to 351d has wavelengths in different regions, so that a color image can be displayed on the display device.

  In the pixels 351a to 351d illustrated in FIG. 9, the gate of the transistor 306 included in the pixel 351a and the gate of the transistor 306 included in the pixel 351b are electrically connected to the wiring MLa. In addition, the gate of the transistor 306 included in the pixel 351c and the gate of the transistor 306 included in the pixel 351d are electrically connected to the wiring MLb.

  In the pixels 351a to 351d illustrated in FIG. 9, the back gate of the transistor 306 included in the pixel 351a and the back gate of the transistor 306 included in the pixel 351c are electrically connected to the wiring GEb. In addition, the back gate of the transistor 306 included in the pixel 351b and the back gate of the transistor 306 included in the pixel 351d are electrically connected to the wiring GEa.

  In the pixel 351a to the pixel 351d illustrated in FIG. 9, one of a source and a drain of the transistor 306 included in the pixel 351a and one of a source and a drain of the transistor 306 included in the pixel 351b are electrically connected to the wiring DLa. ing. In addition, one of a source and a drain of the transistor 306 included in the pixel 351c and one of a source and a drain of the transistor 306 included in the pixel 351d are electrically connected to the wiring DLb.

  In the pixels 351a to 351d illustrated in FIG. 9, the back gate of the transistor 308 included in the pixel 351a and the back gate of the transistor 308 included in the pixel 351c are electrically connected to the wiring GEb. In addition, the back gate of the transistor 308 included in the pixel 351b and the back gate of the transistor 308 included in the pixel 351d are electrically connected to the wiring GEa.

  In the pixels 351a to 351d illustrated in FIGS. 9A and 9B, the gate and the source or drain of the transistor 308 included in the pixel 351a are electrically connected to the wiring MLa, and the gate and source or drain of the transistor 308 included in the pixel 351b are included. Is electrically connected to the wiring MLa. In addition, the gate and the source or drain of the transistor 308 included in the pixel 351c are electrically connected to the wiring MLb, and the gate and one of the source or drain of the transistor 308 included in the pixel 351b are electrically connected to the wiring MLb. It is connected.

  In the pixels 351a to 351d illustrated in FIG. 9, one of the sources and drains of all the transistors 305 is electrically connected to the wiring AL.

  As described above, in the pixels 351a to 351d illustrated in FIG. 9, the pixel 351a and the pixel 351c share the wiring GEb, and the pixel 351b and the pixel 351d share the wiring GEa, but all of the pixels 351a to 351b are shared. May share one wiring GE. In this case, it is preferable that the pixels 351a to 351b be electrically connected to four different wirings DL.

  Note that by using a transistor with low off-state current for the pixel 350, the driver circuit can be temporarily stopped when the display screen does not need to be rewritten (that is, when a still image is displayed). The power consumption of the display device 200 can be reduced by idling stop driving.

  This embodiment can be implemented in appropriate combination with any of the other embodiments.

(Embodiment 4)
In this embodiment, the display device 200 illustrated in FIG. 5A is described as an example, and a specific structure example of the display device 200 using a reflective display element and a light-emitting display element is described.

  FIG. 10 shows an example of a cross-sectional structure of the display device 200.

  A display device 200 illustrated in FIG. 10 has a structure in which a first display region 121 and a second display region 122 are stacked between a substrate 250 and a substrate 251. Specifically, in FIG. 10, the first display region 121 and the second display region 122 are bonded by an adhesive layer 252.

  10 illustrates the light-emitting element 302, the transistor 305, and the capacitor 307 included in the pixel in the first display region 121, and the transistor 309 included in the driver circuit in the first display region 121. 10 illustrates a liquid crystal element 301 included in a pixel in the second display region 122, a transistor 303, a capacitor 304, and a transistor 310 included in a driver circuit in the second display region 122.

  The transistor 305 includes a conductive layer 311 having a function as a back gate, an insulating layer 312 over the conductive layer 311, a semiconductor layer 313 overlapping with the conductive layer 311 over the insulating layer 312, and an insulating layer 316 over the semiconductor layer 313. , A conductive layer 317 which functions as a gate and is located on the insulating layer 316, and a conductive layer which is further above the insulating layer 318 located on the conductive layer 317 and electrically connected to the semiconductor layer 313 314 and a conductive layer 315.

  In addition, the conductive layer 315 is electrically connected to the conductive layer 319, and the conductive layer 319 is electrically connected to the conductive layer 320. The conductive layer 319 is formed in the same layer as the conductive layer 317, and the conductive layer 320 is formed in the same layer as the conductive layer 311.

  In addition, a conductive layer 321 that functions as a back gate of the transistor 306 (not illustrated) is located in the same layer as the conductive layers 311 and 320. An insulating layer 312 is located over the conductive layer 321, and a semiconductor layer 322 having a region overlapping with the conductive layer 321 is located over the insulating layer 312. The semiconductor layer 322 includes a channel formation region of the transistor 306 (not shown). An insulating layer 318 is located over the semiconductor layer 322, and a conductive layer 323 is located over the insulating layer 318. The conductive layer 323 is electrically connected to the semiconductor layer 322, and the conductive layer 323 functions as a source electrode or a drain of the transistor 306 (not illustrated).

  Since the transistor 309 has a structure similar to that of the transistor 305, detailed description thereof is omitted.

  An insulating layer 324 is located over the transistor 305, the conductive layer 323, and the transistor 309, and an insulating layer 325 is located over the insulating layer 324. A conductive layer 326 and a conductive layer 327 are located over the insulating layer 325. The conductive layer 326 is electrically connected to the conductive layer 314, and the conductive layer 327 is electrically connected to the conductive layer 327. An insulating layer 328 is located over the conductive layers 326 and 327, and a conductive layer 329 is located over the insulating layer 328. The conductive layer 329 is electrically connected to the conductive layer 326 and functions as a pixel electrode of the light-emitting element 302.

  A region where the conductive layer 327, the insulating layer 328, and the conductive layer 329 overlap functions as the capacitor 307.

  The insulating layer 330 is located over the conductive layer 329, the EL layer 331 is located over the insulating layer 330, and the conductive layer 332 having a function as a counter electrode is located over the EL layer 331. The conductive layer 329, the EL layer 331, and the conductive layer 332 are electrically connected to each other in the opening portion of the insulating layer 330, and a region where the conductive layer 329, the EL layer 331, and the conductive layer 332 are electrically connected is provided. It functions as the light emitting element 302. The light-emitting element 302 has a top-emission structure that emits light in the direction indicated by the dashed arrow from the conductive layer 332 side.

  One of the conductive layers 329 and 332 functions as an anode and the other functions as a cathode. When a voltage higher than the threshold voltage of the light-emitting element 302 is applied between the conductive layer 329 and the conductive layer 332, holes are injected into the EL layer 331 from the anode side and electrons are injected from the cathode side. The injected electrons and holes are recombined in the EL layer 331, and the light-emitting substance contained in the EL layer 331 emits light.

  Note that in the case where an oxide semiconductor is used for the semiconductor layers 313 and 322, in order to increase the reliability of the display device, the insulating layer 318 is preferably formed using an insulating material containing oxygen, and the insulating layer 324 is formed of water, hydrogen, or the like. It is desirable to use a material in which impurities are difficult to diffuse.

  In the case where an organic material is used for the insulating layer 325 or the insulating layer 330, when the insulating layer 325 or the insulating layer 330 is exposed at an end portion of the display device, display is performed on the light-emitting element 302 or the like through the insulating layer 325 or the insulating layer 330. Impurities such as moisture may enter from the outside of the device. When the light emitting element 302 is deteriorated due to the entry of impurities, the display device is deteriorated. Therefore, as illustrated in FIG. 10, it is preferable that the insulating layer 325 and the insulating layer 330 be not positioned at the end portion of the display device.

  The light-emitting element 302 overlaps with the colored layer 334 with the adhesive layer 333 interposed therebetween. The spacer 335 overlaps with the light shielding layer 336 with the adhesive layer 333 interposed therebetween. Although FIG. 10 shows a case where there is a gap between the conductive layer 332 and the light shielding layer 336, they may be in contact with each other.

  The colored layer 334 is a colored layer that transmits light in a specific wavelength band. For example, a color filter that transmits light in a red, green, blue, or yellow wavelength band can be used.

  Note that one embodiment of the present invention is not limited to the color filter method, and a color separation method, a color conversion method, a quantum dot method, or the like may be applied.

  In the second display region 122, the transistor 303 includes a conductive layer 340 functioning as a back gate, an insulating layer 341 over the conductive layer 340, a semiconductor layer 342 overlapping with the conductive layer 340 over the insulating layer 341, a semiconductor The insulating layer 343 over the layer 342, the conductive layer 344 which functions as a gate and is located over the insulating layer 343, and the insulating layer 345 which is located over the conductive layer 344 and is electrically connected to the semiconductor layer 342. A conductive layer 346 and a conductive layer 347 which are connected to each other.

  In addition, the conductive layer 348 is located in the same layer as the conductive layer 340. An insulating layer 341 is located over the conductive layer 348, and a conductive layer 347 is located over the insulating layer 341 in a region overlapping with the conductive layer 348. A region where the conductive layer 347, the insulating layer 341, and the conductive layer 348 overlap with each other functions as the capacitor 304.

  Since the transistor 310 has a structure similar to that of the transistor 303, detailed description thereof is omitted.

  An insulating layer 360 is located over the transistor 303, the capacitor 304, and the transistor 310, and a conductive layer 349 is located over the insulating layer 330. The conductive layer 349 is electrically connected to the conductive layer 347 and functions as a pixel electrode of the liquid crystal element 301. An alignment film 364 is located over the conductive layer 349.

  A conductive layer 361 having a function as a common electrode is located on the substrate 251. Specifically, in FIG. 10, the insulating layer 363 is bonded to the substrate 251 with the adhesive layer 362 interposed therebetween, and the conductive layer 361 is positioned on the insulating layer 363. An alignment film 365 is positioned on the conductive layer 361, and a liquid crystal layer 366 is positioned between the alignment film 364 and the alignment film 365.

  In FIG. 10, the conductive layer 349 has a function of reflecting visible light, and the conductive layer 361 has a function of transmitting visible light, so that light incident from the substrate 251 side can be transmitted as indicated by a dashed arrow. The light can be reflected from the layer 349 and emitted from the substrate 251 side.

  As the conductive material that transmits visible light, for example, a material containing one kind selected from indium (In), zinc (Zn), and tin (Sn) may be used. Specifically, indium oxide, indium tin oxide (ITO), indium zinc oxide, indium oxide containing tungsten oxide, indium zinc oxide containing tungsten oxide, indium oxide containing titanium oxide, Indium tin oxide containing titanium oxide, indium tin oxide containing silicon oxide (ITSO), zinc oxide, zinc oxide containing gallium, and the like can be given. Note that a film containing graphene can also be used. The film containing graphene can be formed, for example, by reducing a film containing graphene oxide formed in a film shape.

  Examples of the conductive material that reflects visible light include aluminum, silver, and alloys containing these metal materials. In addition, a metal material such as gold, platinum, nickel, tungsten, chromium, molybdenum, iron, cobalt, copper, or palladium, or an alloy containing these metal materials can be used. In addition, lanthanum, neodymium, germanium, or the like may be added to the metal material or alloy. Alloys containing aluminum such as aluminum and titanium alloys, aluminum and nickel alloys, aluminum and neodymium alloys, aluminum, nickel, and lanthanum alloys (Al-Ni-La), silver and copper alloys, An alloy containing silver such as an alloy of silver, palladium, and copper (also referred to as Ag-Pd-Cu, APC), an alloy of silver and magnesium, or the like may be used.

  Note that although FIG. 10 illustrates the structure of a display device using a top-gate transistor having a back gate, the display device according to one embodiment of the present invention may use a transistor without a back gate. In addition, a back gate transistor may be used.

  There is no particular limitation on the crystallinity of a semiconductor material used for the transistor, and any of an amorphous semiconductor and a semiconductor having crystallinity (a microcrystalline semiconductor, a polycrystalline semiconductor, a single crystal semiconductor, or a semiconductor partially including a crystal region) is used. May be used. It is preferable to use a crystalline semiconductor because deterioration of transistor characteristics can be suppressed.

  As a semiconductor material used for the transistor, an oxide semiconductor can be used. Typically, an oxide semiconductor containing indium can be used.

  In particular, it is preferable to use a semiconductor material having a wider band gap and lower carrier density than silicon because current in the off-state of the transistor can be reduced.

  The semiconductor layer is represented by an In-M-Zn-based oxide containing at least indium, zinc, and M (metal such as aluminum, titanium, gallium, germanium, yttrium, zirconium, lanthanum, cerium, tin, neodymium, or hafnium). It is preferable to include a film. In addition, in order to reduce variation in electrical characteristics of the transistor including the oxide semiconductor, a stabilizer is preferably included together with the transistor.

  Examples of the stabilizer include gallium, tin, hafnium, aluminum, zirconium, and the like, including the metals described in M above. Other stabilizers include lanthanoids such as lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, and lutetium.

  As an oxide semiconductor included in the semiconductor layer, for example, an In—Ga—Zn-based oxide, an In—Al—Zn-based oxide, an In—Sn—Zn-based oxide, an In—Hf—Zn-based oxide, an In— La-Zn oxide, In-Ce-Zn oxide, In-Pr-Zn oxide, In-Nd-Zn oxide, In-Sm-Zn oxide, In-Eu-Zn oxide In-Gd-Zn-based oxide, In-Tb-Zn-based oxide, In-Dy-Zn-based oxide, In-Ho-Zn-based oxide, In-Er-Zn-based oxide, In-Tm -Zn oxide, In-Yb-Zn oxide, In-Lu-Zn oxide, In-Sn-Ga-Zn oxide, In-Hf-Ga-Zn oxide, In-Al- Ga-Zn-based oxide, In-Sn-Al-Zn-based oxide, In-Sn-Hf-Zn-based Product, can be used In-Hf-Al-Zn-based oxide.

  Note that here, an In—Ga—Zn-based oxide means an oxide containing In, Ga, and Zn as its main components, and there is no limitation on the ratio of In, Ga, and Zn. Moreover, metal elements other than In, Ga, and Zn may be contained.

  Note that in this embodiment mode, the structure of a display device using a liquid crystal element as a reflective display element is illustrated, but as a reflective display element, in addition to a liquid crystal element, a shutter-type MEMS (Micro Electro Mechanical System) element is used. An optical interference type MEMS device, a microcapsule method, an electrophoresis method, an electrowetting method, an electronic powder fluid (registered trademark) method, or the like can be used.

  In addition, as the light-emitting display element, for example, a self-luminous light-emitting element such as an OLED (Organic Light Emitting Diode), an LED (Light Emitting Diode), or a QLED (Quantum-Dot Light Emitting Diode) can be used.

  As the liquid crystal element, for example, a liquid crystal element to which a vertical alignment (VA: Vertical Alignment) mode is applied can be used. As the vertical alignment mode, an MVA (Multi-Domain Vertical Alignment) mode, a PVA (Patterned Vertical Alignment) mode, an ASV (Advanced Super View) mode, or the like can be used.

  As the liquid crystal element, liquid crystal elements to which various modes are applied can be used. For example, in addition to the VA mode, a TN (Twisted Nematic) mode, an IPS (In-Plane-Switching) mode, an FFS (Fringe Field Switching) mode, an ASM (Axially Symmetrical Aligned Micro-cell) mode Further, a liquid crystal element to which an FLC (Ferroelectric Liquid Crystal) mode, an AFLC (Antiferroelectric Liquid Crystal) mode, or the like is applied can be used.

  As the liquid crystal used in the liquid crystal element, a thermotropic liquid crystal, a low molecular liquid crystal, a polymer liquid crystal, a polymer dispersed liquid crystal (PDLC), a ferroelectric liquid crystal, an antiferroelectric liquid crystal, or the like is used. Can do. These liquid crystal materials exhibit a cholesteric phase, a smectic phase, a cubic phase, a chiral nematic phase, an isotropic phase, and the like depending on conditions.

  Further, as the liquid crystal material, either a positive type liquid crystal or a negative type liquid crystal may be used, and an optimal liquid crystal material may be used according to an applied mode or design.

  An alignment film can be provided to control the alignment of the liquid crystal. Note that in the case of employing a horizontal electric field mode, liquid crystal exhibiting a blue phase for which an alignment film is unnecessary may be used. The blue phase is one of the liquid crystal phases. When the temperature of the cholesteric liquid crystal is increased, the blue phase appears immediately before the transition from the cholesteric phase to the isotropic phase. Since the blue phase appears only in a narrow temperature range, a liquid crystal composition mixed with several percent by weight or more of a chiral agent is used for the liquid crystal layer in order to improve the temperature range. A liquid crystal composition containing a liquid crystal exhibiting a blue phase and a chiral agent has a short response speed and is optically isotropic. In addition, a liquid crystal composition including a liquid crystal exhibiting a blue phase and a chiral agent does not require alignment treatment and has a small viewing angle dependency. Further, since it is not necessary to provide an alignment film, a rubbing process is not required, so that electrostatic breakdown caused by the rubbing process can be prevented, and defects or breakage of the liquid crystal display device during the manufacturing process can be reduced. .

  This embodiment can be implemented in appropriate combination with any of the other embodiments.

(Embodiment 5)
Next, FIG. 11A illustrates an example of an appearance of the display device 200 according to one embodiment of the present invention. A display device 200 illustrated in FIG. 11A includes a pixel portion 501 over a substrate 500, a pixel scanning line driver circuit 502 including a reflective display element, and a pixel scanning line driver circuit including a light emitting display element. 503. The IC 504 includes a pixel signal line driver circuit having a reflective display element, and is electrically connected to the pixel portion 501 through a wiring 506. The IC 505 includes a pixel signal line driver circuit having a light-emitting display element, and is electrically connected to the pixel portion 501 through a wiring 506.

  The FPC 508 is electrically connected to the IC 504, and the FPC 509 is electrically connected to the IC 505. The FPC 510 is electrically connected to the scan line driver circuit 502 through the wiring 511. The FPC 510 is electrically connected to the scan line driver circuit 503 through the wiring 512.

  Next, taking as an example the case where a liquid crystal element is used as the reflective display element and the light emitting element is used as the light emitting display element, the layout of the display region of the liquid crystal element and the display of the light emitting element in the pixel 513 of the pixel portion 501 The layout of the area is shown in FIG.

  Specifically, in FIG. 11B, the pixel 513 corresponds to a display area 514 of a liquid crystal element, a display area 515 of a light emitting element corresponding to yellow, a display area 516 of a light emitting element corresponding to green, and a red color. A display area 517 of the light emitting element and a display area 518 of the light emitting element corresponding to blue are included.

  When displaying black with good color reproducibility using light emitting elements corresponding to green, blue, red, and yellow, the amount of current flowing per area of the light emitting element is the smallest for the light emitting elements corresponding to yellow. Is required. In FIG. 11B, the display area 516 of the light emitting element corresponding to green, the display area 517 of the light emitting element corresponding to red, and the display area 518 of the light emitting element corresponding to blue have substantially the same area. However, since the area of the display area 515 of the light emitting element corresponding to yellow is slightly small, it is possible to display black with good color reproducibility.

  This embodiment can be implemented in appropriate combination with any of the other embodiments.

(Embodiment 6)
In this specification and the like, a metal oxide is a metal oxide in a broad expression. Metal oxides are classified into oxide insulators, oxide conductors (including transparent oxide conductors), oxide semiconductors (also referred to as oxide semiconductors or simply OS), and the like. For example, in the case where a metal oxide is used for a semiconductor layer of a transistor, the metal oxide may be referred to as an oxide semiconductor. In other words, when a metal oxide has at least one of an amplifying function, a rectifying function, and a switching function, the metal oxide can be referred to as a metal oxide semiconductor, or OS for short. In the case of describing as an OS FET, it can be said to be a transistor including a metal oxide or an oxide semiconductor.

  In this specification and the like, metal oxides containing nitrogen may be collectively referred to as metal oxides. Further, a metal oxide containing nitrogen may be referred to as a metal oxynitride.

  Moreover, in this specification etc., it may describe as CAAC (c-axis aligned crystal) and CAC (cloud aligned complementary). Note that CAAC represents an example of a crystal structure, and CAC represents an example of a function or a material structure.

  In this specification and the like, a CAC-OS or a CAC-metal oxide has a conductive function in part of a material and an insulating function in part of the material, and the whole material is a semiconductor. It has the function of. Note that in the case where a CAC-OS or a CAC-metal oxide is used for a semiconductor layer of a transistor, the conductive function is a function of flowing electrons (or holes) serving as carriers, and the insulating function is an electron serving as carriers. It is a function that does not flow. By performing the conductive function and the insulating function in a complementary manner, a switching function (a function for turning on / off) can be given to the CAC-OS or the CAC-metal oxide. In CAC-OS or CAC-metal oxide, the functions of both can be maximized by separating the functions.

  Moreover, CAC-OS or CAC-metal oxide is comprised by the component which has a different band gap. For example, CAC-OS or CAC-metal oxide includes a component having a wide gap caused by an insulating region and a component having a narrow gap caused by a conductive region. In the case of the configuration, when the carrier flows, the carrier mainly flows in the component having the narrow gap. In addition, the component having a narrow gap acts in a complementary manner to the component having a wide gap, and the carrier flows through the component having the wide gap in conjunction with the component having the narrow gap. Therefore, when the CAC-OS or the CAC-metal oxide is used for a channel region of a transistor, high current driving capability, that is, high on-state current and high field-effect mobility can be obtained in the on-state of the transistor.

  That is, CAC-OS or CAC-metal oxide can also be called a matrix composite material or a metal matrix composite material.

<Configuration of CAC-OS>
A structure of a CAC-OS that can be used for the transistor disclosed in one embodiment of the present invention is described below.

  The CAC-OS is one structure of a material in which an element included in an oxide semiconductor is unevenly distributed with a size of 0.5 nm to 10 nm, preferably 1 nm to 2 nm, or the vicinity thereof. Note that in the following, in an oxide semiconductor, one or more metal elements are unevenly distributed, and a region including the metal element has a size of 0.5 nm to 10 nm, preferably 1 nm to 2 nm, or the vicinity thereof. The state mixed with is also referred to as mosaic or patch.

  Note that the oxide semiconductor preferably contains at least indium. In particular, it is preferable to contain indium and zinc. In addition, aluminum, gallium, yttrium, copper, vanadium, beryllium, boron, silicon, titanium, iron, nickel, germanium, zirconium, molybdenum, lanthanum, cerium, neodymium, hafnium, tantalum, tungsten, magnesium, etc. One kind selected from the above or a plurality of kinds may be included.

For example, a CAC-OS in In-Ga-Zn oxide (In-Ga-Zn oxide among CAC-OSs may be referred to as CAC-IGZO in particular) is an indium oxide (hereinafter referred to as InO). _X1 (X1 is greater real than 0) and.), or indium zinc oxide _{(hereinafter, in X2 Zn Y2 O Z2 (} X2, Y2, and Z2 is larger real than 0) and a.), gallium An oxide (hereinafter referred to as GaO _X3 (X3 is a real number greater than 0)) or a gallium zinc oxide (hereinafter referred to as Ga _X4 Zn _Y4 O _Z4 (where X4, Y4, and Z4 are greater than 0)) to.) and the like, the material becomes mosaic by separate into, mosaic _{InO X1,} or _in X2 _Zn Y2 _{O Z2} is configured uniformly distributed in the film (hereinafter, cloud Also referred to.) A.

That, CAC-OS includes a region _{GaO X3} is the main _component, In _{X2 Zn} Y2 _{O Z2,} or _{InO X1} there is a region which is a main component, a composite oxide semiconductor having a structure that is mixed. Note that in this specification, for example, the first region indicates that the atomic ratio of In to the element M in the first region is larger than the atomic ratio of In to the element M in the second region. It is assumed that the concentration of In is higher than that in the second region.

Note that IGZO is a common name and sometimes refers to one compound of In, Ga, Zn, and O. As a typical example, InGaO ₃ (ZnO) _m1 (m1 is a natural number) or In _{(1 + x0)} Ga _(1-x0) O ₃ (ZnO) _m0 (−1 ≦ x0 ≦ 1, m0 is an arbitrary number) A crystalline compound may be mentioned.

  The crystalline compound has a single crystal structure, a polycrystalline structure, or a CAAC structure. The CAAC structure is a crystal structure in which a plurality of IGZO nanocrystals have c-axis orientation and are connected without being oriented in the ab plane.

  On the other hand, CAC-OS relates to a material structure of an oxide semiconductor. CAC-OS refers to a region that is observed in the form of nanoparticles mainly composed of Ga in a material structure including In, Ga, Zn, and O, and nanoparticles that are partially composed mainly of In. The region observed in a shape is a configuration in which the regions are randomly dispersed in a mosaic shape. Therefore, in the CAC-OS, the crystal structure is a secondary element.

  Note that the CAC-OS does not include a stacked structure of two or more kinds of films having different compositions. For example, a structure composed of two layers of a film mainly containing In and a film mainly containing Ga is not included.

Incidentally, a region _{GaO X3} is the main _component, In _{X2 Zn} Y2 _{O Z2,} or the region _{InO X1} is the main component, it may clear boundary can not be observed.

  Instead of gallium, selected from aluminum, yttrium, copper, vanadium, beryllium, boron, silicon, titanium, iron, nickel, germanium, zirconium, molybdenum, lanthanum, cerium, neodymium, hafnium, tantalum, tungsten, magnesium, etc. In the case where one or more types are included, the CAC-OS includes a region observed in a part of a nanoparticle mainly including the metal element and a nano part mainly including In. The region observed in the form of particles refers to a configuration in which each region is randomly dispersed in a mosaic shape.

  The CAC-OS can be formed by a sputtering method under a condition where the substrate is not intentionally heated, for example. In the case where a CAC-OS is formed by a sputtering method, any one or more selected from an inert gas (typically argon), an oxygen gas, and a nitrogen gas may be used as a deposition gas. Good. Further, the flow rate ratio of the oxygen gas to the total flow rate of the deposition gas during film formation is preferably as low as possible. .

  The CAC-OS is characterized in that no clear peak is observed when it is measured using a θ / 2θ scan by the out-of-plane method, which is one of the X-ray diffraction (XRD) measurement methods. Have. That is, it can be seen from X-ray diffraction that no orientation in the ab plane direction and c-axis direction of the measurement region is observed.

  In addition, in the CAC-OS, an electron diffraction pattern obtained by irradiating an electron beam with a probe diameter of 1 nm (also referred to as a nanobeam electron beam) has a ring-like region having a high luminance and a plurality of bright regions in the ring region. A point is observed. Therefore, it can be seen from the electron beam diffraction pattern that the crystal structure of the CAC-OS has an nc (nano-crystal) structure having no orientation in the planar direction and the cross-sectional direction.

Further, for example, in a CAC-OS in an In—Ga—Zn oxide, a region in which GaO _X3 is a main component is obtained by EDX mapping obtained by using energy dispersive X-ray spectroscopy (EDX). It can be confirmed that a region in which In _X2 Zn _Y2 O _Z2 or InO _X1 is a main component is unevenly distributed and mixed.

The CAC-OS has a structure different from that of the IGZO compound in which the metal element is uniformly distributed, and has a property different from that of the IGZO compound. That is, in the CAC-OS, a region in which GaO _X3 or the like is a main component and a region in which In _X2 Zn _Y2 O _Z2 or InO _X1 is a main component are phase-separated from each other, and a region in which each element is a main component. Has a mosaic structure.

Here, the region containing In _X2 Zn _Y2 O _Z2 or InO _X1 as a main component is a region having higher conductivity than a region containing GaO _X3 or the like as a main component. _That, In _{X2 Zn} Y2 _{O Z2,} or _{InO X1} is a region which is a main component, by carriers flow, expressed the conductivity of the oxide semiconductor. Therefore, a region where In _X2 Zn _Y2 O _Z2 or InO _X1 is a main component is distributed in a cloud shape in the oxide semiconductor, whereby high field-effect mobility (μ) can be realized.

On the other hand, areas such as _{GaO X3} is the main _component, In _{X2 Zn} Y2 _{O Z2,} or _{InO X1} is compared to region which is a main component, has a high area insulation. That is, a region containing GaO _X3 or the like as a main component is distributed in the oxide semiconductor, whereby leakage current can be suppressed and good switching operation can be realized.

Accordingly, when CAC-OS is used for a semiconductor element, high insulation is achieved by the complementary action of the insulating properties caused by GaO _{X3 and the} like and the conductivity caused by In _X2 Zn _Y2 O _Z2 or InO _X1. An on-current (I _on ) and high field effect mobility (μ) can be realized.

  In addition, a semiconductor element using a CAC-OS has high reliability. Therefore, the CAC-OS is optimal for various semiconductor devices including a display.

  This embodiment can be implemented in appropriate combination with at least part of the other embodiments described in this specification.

(Embodiment 7)
Next, application examples of the display module using the display panel described in any of the above embodiments will be described with reference to FIGS.

  A display module 800 illustrated in FIG. 12 includes a touch panel 804 connected to the FPC 803, a display panel 806 connected to the FPC 805, a frame 809, a printed board 810, and a battery 811 between an upper cover 801 and a lower cover 802. Note that the battery 811, the touch panel 804, and the like may not be provided.

  The display panel described in the above embodiment can be used for the display panel 806 in FIG.

  The shapes and dimensions of the upper cover 801 and the lower cover 802 can be changed as appropriate in accordance with the sizes of the touch panel 804 and the display panel 806.

  As the touch panel 804, a resistive touch panel or a capacitive touch panel can be used by being superimposed on the display panel 806. The counter substrate (sealing substrate) of the display panel 806 can have a touch panel function. Alternatively, an optical sensor can be provided in each pixel of the display panel 806 to provide an optical touch panel. Alternatively, a touch sensor electrode may be provided in each pixel of the display panel 806 to form a capacitive touch panel. In this case, the touch panel 804 can be omitted.

  The upper cover 801 may have an optical path. Light emitted from the light source or light source module mounted on the printed circuit board 810 passes through the optical path provided in the upper cover 801, is irradiated from one side of the upper cover, and is different from the one side that emits light. It is also possible to detect the presence or absence of a screen touch due to the touch of a finger, a pen, or the like by determining the presence or absence of light incident on the optical path by a photo sensor or photo sensor module mounted on the printed circuit board 810. In this case, the display panel 806 or the counter substrate of the display panel 806 may not have a touch panel function, and the touch panel 804 may be omitted.

  FIG. 13A is a schematic diagram illustrating a configuration example in the case of using a mutual capacitive touch sensor as an example of the touch panel 804. In FIG. 13A, as an example, the wiring CLx to which a pulse voltage is applied is shown as six wirings X1-X6, and the wiring CLy for detecting a change in current is shown as six wirings Y1-Y6. Note that the number of wirings is not limited to this. FIG. 13A illustrates a capacitor 854 which is formed by overlapping the wiring CLx and the wiring CLy or by arranging the wiring CLx and the wiring CLy close to each other.

  The wiring CLx and the wiring CLy are electrically connected to the IC 850. The IC 850 includes a drive circuit 851 and a detection circuit 852.

  The drive circuit 851 is, for example, a circuit for sequentially applying pulses to the X1-X6 wirings. When a pulse voltage is applied to the wiring lines X1 to X6, an electric field is generated between the wiring lines CLx and CLy that form the capacitor 854. A current flows through the capacitor 854 by the pulse voltage. The electric field generated between the electrodes changes due to shielding by touching with a finger or a pen. That is, the capacitance value of the capacitor 854 changes due to a touch such as a finger or a pen. As described above, the proximity or contact of the detection target can be detected by using the change in the capacitance value by touching with a finger or a pen.

  The detection circuit 852 is a circuit for detecting a change in current in the wiring of Y1-Y6 due to a change in the capacitance value in the capacitor 854. In the Y1-Y6 wiring, there is no change in the detected current value when there is no proximity or contact with the detected object, but when the capacitance value decreases due to the proximity or contact with the detected object, the current value decreases. Detect changes that occur. The current may be detected by detecting the total amount of current. In that case, detection may be performed using an integration circuit or the like. Alternatively, the peak value of the current may be detected. In that case, the peak value of the voltage value may be detected by converting the current into a voltage.

  In FIG. 13A, the driver circuit 851 and the detection circuit 852 are formed using the same IC, but each circuit may be formed using different ICs. The detection circuit 852 is likely to malfunction due to the influence of noise. On the other hand, the drive circuit 851 can be a noise generation source. By forming the driver circuit 851 and the detection circuit 852 using different ICs, malfunction of the detection circuit 852 can be prevented.

  Alternatively, the driver circuit 851, the detection circuit 852, and the driver circuit for the display panel 806 may be formed using a single IC. In that case, the cost of the IC occupying the entire display module can be reduced.

  In FIG. 13A, the IC 850 is disposed on the touch panel 804; however, the IC 850 may be disposed on the FPC 803. A schematic diagram in that case is shown in FIG.

  Returning again to FIG.

  The frame 809 has a function as an electromagnetic shield for blocking electromagnetic waves generated by the operation of the printed board 810, in addition to a protective function of the display panel 806. The frame 809 may have a function as a heat sink.

  The printed board 810 includes a power supply circuit, a signal processing circuit for outputting a video signal and a clock signal. Furthermore, you may have the light source and optical sensor for touch detection. The wavelength range of the light source is preferably a wavelength range greater than 780 nm, and more preferably a wavelength range greater than 1.6 um. The optical sensor has a function of detecting light in the wavelength range of the light source. The power source for supplying power to the power supply circuit may be an external commercial power source or a power source using a battery 811 provided separately. The battery 811 can be omitted when a commercial power source is used.

  Further, the display module 800 may be additionally provided with a member such as a polarizing plate, a retardation plate, and a prism sheet.

(Embodiment 8)
In this embodiment, an IC chip, an electronic component, an electronic device, and the like will be described as an example of a semiconductor device.

<Example of electronic component manufacturing method>
FIG. 14A is a flowchart illustrating an example of a method for manufacturing an electronic component. The electronic component is also referred to as a semiconductor package or an IC package. This electronic component has a plurality of standards and names depending on the terminal take-out direction and the shape of the terminal. Therefore, in this embodiment, an example will be described.

  A semiconductor device including a transistor is completed by combining a plurality of parts that can be attached to and detached from a printed circuit board through an assembly process (post-process). The post-process can be completed through each process shown in FIG. Specifically, after the element substrate obtained in the previous process is completed (step ST71), the back surface of the substrate is ground. At this stage, the substrate is thinned to reduce the warpage of the substrate in the previous process and reduce the size of the component. Next, a dicing process for separating the substrate into a plurality of chips is performed (step ST72).

FIG. 14B is a top view of the semiconductor wafer 7100 before the dicing process is performed. FIG. 14C is a partially enlarged view of FIG. A plurality of circuit regions 7102 are provided in the semiconductor wafer 7100.
In the circuit region 7102, a semiconductor device according to an embodiment of the present invention (eg, a memory device, an imaging device, an MCU, or the like) is provided.

  Each of the plurality of circuit regions 7102 is surrounded by the isolation region 7104. A separation line (also referred to as a “dicing line”) 7106 is set at a position overlapping with the separation region 7104. In the dicing step 72, the chip 7110 including the circuit region 7102 is cut out from the semiconductor wafer 7100 by cutting the semiconductor wafer 7100 along the separation line 7106. FIG. 14D is an enlarged view of the chip 7110.

  A conductive layer or a semiconductor layer may be provided in the separation region 7104. By providing a conductive layer or a semiconductor layer in the separation region 7104, ESD that can occur in the dicing process can be reduced, and a reduction in yield due to the dicing process can be prevented. In general, the dicing step is performed while supplying pure water having a specific resistance lowered by dissolving carbon dioxide gas or the like for the purpose of cooling the substrate, removing shavings, and preventing charging. By providing a conductive layer or a semiconductor layer in the separation region 7104, the amount of pure water used can be reduced. Thus, the production cost of the semiconductor device can be reduced. In addition, the productivity of the semiconductor device can be increased.

  After performing step ST72, a die bonding step is performed in which the separated chips are individually picked up and mounted on the lead frame and bonded (step ST73). As a bonding method between the chip and the lead frame in the die bonding process, a method suitable for the product may be selected. For example, the bonding may be performed with resin or tape. In the die bonding step, a chip may be mounted on the interposer and bonded. In the wire bonding step, the lead frame lead and the electrode on the chip are electrically connected by a thin metal wire (wire) (step ST74). A silver wire or a gold wire can be used as the metal thin wire. Wire bonding may be either ball bonding or wedge bonding.

  The wire bonded chip is sealed with an epoxy resin or the like and subjected to a molding process (step ST75). By performing the molding process, the inside of the electronic component is filled with resin, which can reduce damage to the built-in circuit part and wires due to mechanical external force, and can reduce deterioration of characteristics due to moisture and dust. it can. The lead frame lead is plated. Then, the lead is cut and molded (step ST76). The plating process prevents rusting of the lead, and soldering when mounted on a printed circuit board later can be performed more reliably. A printing process (marking) is performed on the surface of the package (step ST77). Through the inspection process (step ST78), the electronic component is completed (step ST79). By incorporating the semiconductor device of the above embodiment, a small electronic component with low power consumption can be provided.

  A schematic perspective view of the completed electronic component is shown in FIG. FIG. 14E shows a schematic perspective view of a QFP (Quad Flat Package) as an example of an electronic component. As shown in FIG. 14E, the electronic component 7000 includes a lead 7001 and a chip 7110.

  The electronic component 7000 is mounted on a printed circuit board 7002, for example. A plurality of such electronic components 7000 are combined, and each is electrically connected on the printed circuit board 7002 so that the electronic component 7000 can be mounted on an electronic device. The completed circuit board 7004 is provided inside an electronic device or the like. By mounting the electronic component 7000, the power consumption of the electronic device can be reduced. Alternatively, the electronic device can be easily downsized.

  Electronic components 7000 include digital signal processing, software defined radio, avionics (electronic equipment related to aviation such as communication equipment, navigation system, autopilot, flight management system), ASIC prototyping, medical image processing, voice recognition, cryptography, It can be applied to electronic components (IC chips) of electronic devices in a wide range of fields such as bioinformatics (biological information science), emulators of mechanical devices, and radio telescopes in radio astronomy. Such electronic devices include cameras (video cameras, digital still cameras, etc.), display devices, personal computers (PCs), mobile phones, portable game machines, portable information terminals (smartphones, tablet information terminals, etc.) ), E-book terminal, wearable information terminal (clock type, head mount type, goggles type, glasses type, armband type, bracelet type, necklace type, etc.), navigation system, sound playback device (car audio, digital audio player, etc.) , Copiers, facsimiles, printers, printer multifunction devices, automatic teller machines (ATMs), vending machines, household appliances, and the like.

  15A and 16E illustrate structural examples of electronic devices. A touch panel device having a touch sensor is preferably used for the display portion of the electronic device in FIG. By using the touch panel device, the display unit can function as an input unit of the electronic device.

  An information terminal 2010 illustrated in FIG. 15A includes an operation button 2013, an external connection port 2014, a speaker 2015, and a microphone 2016 in addition to the display portion 2012 incorporated in a housing 2011. Here, the display area of the display unit 2012 is curved. The information terminal 2010 is a portable information terminal driven by a battery, and can be used as a tablet information terminal or a smartphone. The information terminal 2010 has functions such as telephone, e-mail, notebook, Internet connection, music playback, and imaging by an imaging module. Information can be input by touching the display portion 2012 with a finger or the like. In addition, various operations such as making a call, inputting characters, and a screen switching operation of the display portion 2012 are performed by touching the display portion 2012 with a finger or the like. The information terminal 2010 can also be operated by inputting voice from the microphone 2016. By operating the operation button 2013, various operations such as a power on / off operation and a screen switching operation of the display unit 2012 can be performed. As the display portion 2012, the display device 200 of this specification can be used. Therefore, when using a portable information terminal under external light, visibility can be improved and power consumption can be reduced.

  FIG. 15B illustrates an example of a wristwatch-type information terminal. The information terminal 2030 includes a housing 2031, a display portion 2032, a crown 2033, a belt 2034, and a detection portion 2035. The information terminal 2030 can be operated by rotating the crown 2033. The information terminal 2030 can be operated by touching the display portion 2032 with a finger.

  For example, the detection unit 2035 has a function of acquiring use environment information and biological information. A microphone, an image sensor, an acceleration sensor, an orientation sensor, a pressure sensor, a temperature sensor, a humidity sensor, an illuminance sensor, a positioning sensor (for example, GPS (Global Positioning System)), and the like may be provided in the detection unit 2035.

  A wireless communication device of the same standard may be incorporated in the information terminal 2010 and the information terminal 2030, and bidirectional communication may be performed using the wireless signal 2020. As the display portion 2032, the display device 200 of this specification can be used. When displaying the time, the hour hand, the minute hand, or the segment indicating the hour and minute is displayed by a reflective liquid crystal element. Further, the display of the second hand and the segment representing the second can be reduced by displaying the EL element.

When information is displayed by the reflective liquid crystal element, the EL element can be used to superimpose the display such as schedule notification, incoming mail, and fluctuation of vital information such as heartbeat. Since the display data can be managed individually, the power consumption can be reduced by reducing the amount of calculation of the image processing unit.

  FIG. 15C illustrates an example of a glasses-type information terminal. The information terminal 2040 includes a mounting unit 2041, a housing 2042, a cable 2045, a battery 2046, a display unit 2047, and an imaging module 2048. The battery 2046 is housed in the mounting portion 2041. The display portion 2047 is provided in the housing 2042. The housing 2042 incorporates a processor, a wireless communication device, a storage device, and various electronic components. Power is supplied from the battery 2046 to the display portion 2047 and the electronic components in the housing 2042 through the cable 2045.

The display unit 2047 displays display data created by adding information from wireless or imaging data obtained from the imaging module 2048. The imaging data can be displayed by an EL element, and information obtained from wireless etc. can be displayed according to the user's situation, such as being displayed by a reflective liquid crystal element.

  An imaging module may be provided in the housing 2042. The information terminal 2040 can be operated by detecting and knowing the movement of the user's eyeball and eyelid by the imaging module.

  The mounting unit 2041 may be provided with various sensors such as a temperature sensor, a pressure sensor, an acceleration sensor, and a biological sensor. For example, the biometric information of the user is acquired by a biometric sensor and stored in a storage device in the housing 2042. For example, the wireless signal 2021 enables bidirectional communication between the information terminal 2010 and the information terminal 2040. The information terminal 2040 transmits the stored biological information to the information terminal 2010. The information terminal 2010 calculates the user's fatigue level, activity amount, and the like from the received biological information.

  A laptop personal computer 2050 illustrated in FIG. 16A includes a housing 2051, a display portion 2052, a keyboard 2053, and a pointing device 2054. The laptop personal computer 2050 can be operated by a touch operation on the display portion 2052. As the display portion 2052, the display device 200 of this specification can be used. Therefore, when a notebook personal computer is used under external light, visibility can be improved and power consumption can be reduced.

  A video camera 2070 illustrated in FIG. 16B includes a housing 2071, a display portion 2072, a housing 2073, operation keys 2074, a lens 2075, and a connection portion 2076. The display portion 2072 is provided in the housing 2071, and the operation keys 2074 and the lens 2075 are provided in the housing 2073. The housing 2071 and the housing 2073 are connected to each other by the connection portion 2076, and the angle between the housing 2071 and the housing 2073 can be changed by the connection portion 2076. The video on the display portion 2072 may be switched in accordance with the angle between the housing 2071 and the housing 2073 in the connection portion 2076. Various operations such as recording start and stop operations, magnification zoom adjustment, and shooting range change can be executed by touch operations on the display unit 2072.

  A portable game machine 2110 illustrated in FIG. 16C includes a housing 2111, a display portion 2112, a speaker 2113, an LED lamp 2114, operation key buttons 2115, a connection terminal 2116, a camera 2117, a microphone 2118, and a recording medium reading portion 2119. Have. As the display portion 2112, the display device 200 of this specification can be used. Therefore, when using a notebook PC under external light, visibility can be improved and power consumption can be reduced.

  An electric refrigerator-freezer 2150 illustrated in FIG. 16D includes a housing 2151, a refrigerator compartment door 2152, a freezer compartment door 2153, and the like. Although an example in which the refrigerator compartment door 2152 has the display portion 2154 is shown, the freezer compartment door 2153 may have the display portion 2154. The housing 2151 may have a wireless communication function. The display unit 2154 may display management information on the contents of the refrigerator, advertisement information from a registered store within a radius of 10 km, or a picture such as a movie or a poster, using a wireless communication function. Good. Therefore, the display unit 2002 of this specification can be used for the display portion 2052. Therefore, an advertisement, a food list, and the like can be displayed with a reflective liquid crystal element under a fluorescent lamp, thereby reducing power consumption.

A vending machine installed outdoors may be considered the same as a refrigerator installed outdoors. The visibility of display of advertisements and the like can be improved and the power consumption can be reduced under external light.

  A car 2170 illustrated in FIG. 16E includes a vehicle body 2171, wheels 2172, a dashboard 2173, lights 2174, and the like. The processor according to the second embodiment is used for various processors in the automobile 2170.

  This embodiment can be implemented in appropriate combination with at least part of the other embodiments described in this specification.

AL wiring CLx wiring CLy wiring DL wiring DLa wiring DLb wiring GE wiring GEa wiring GEb wiring GL wiring ML wiring MLa wiring MLb wiring SL wiring 10 electronic equipment 72 dicing process 100 control unit 101 CPU
102 memory 103 wireless communication module 104 GPS module 105 touch panel controller 106 imaging module 110 display adapter 111 display controller 111A driver 112 display controller 112A driver 113 selection circuit 121 display area 122 display area 123 touch panel 141 display component 142 display component 143 display component 151 display Component 152 Display component 153 Display component 161 Item 162 Symbol 163 Display button 164 Display button 171 Display region 172 Display region 173 Button display 200 Display device 200A Display 200B Display 201 Substrate 202 Substrate 203 Light emitting device 204 Liquid crystal device 205 Transistor 206 Transistor 207 Pixel electrode 208 Common electrode 209 Liquid crystal layer 21 Layer 210a Layer 210b Layer 232 Display region 250 Substrate 251 Substrate 252 Adhesive layer 300 Pixel 301 Liquid crystal element 302 Light emitting element 303 Transistor 304 Capacitor element 305 Transistor 306 Transistor 307 Capacitor element 308 Transistor 309 Transistor 310 Transistor 311 Conductive layer 312 Insulating layer 313 Semiconductor layer 314 conductive layer 315 conductive layer 316 insulating layer 317 conductive layer 318 insulating layer 319 conductive layer 320 conductive layer 321 conductive layer 322 semiconductor layer 323 conductive layer 324 insulating layer 325 insulating layer 326 conductive layer 327 conductive layer 328 insulating layer 329 conductive layer 330 insulating Layer 331 EL layer 332 Conductive layer 333 Adhesive layer 334 Colored layer 335 Spacer 336 Light blocking layer 340 Conductive layer 341 Insulating layer 342 Semiconductor layer 343 Insulating layer 344 Conductive layer 345 Insulating Layer 346 conductive layer 347 conductive layer 348 conductive layer 349 conductive layer 350 pixel 351 pixel 351a pixel 351b pixel 351c pixel 351d pixel 360 insulating layer 361 conductive layer 362 adhesive layer 363 insulating layer 364 alignment film 365 alignment film 366 liquid crystal layer 500 substrate 501 pixel Unit 502 Scanning line driving circuit 503 Scanning line driving circuit 504 IC
505 IC
506 Wiring 508 FPC
509 FPC
510 FPC
511 wiring 512 wiring 513 pixel 514 display area 515 display area 516 display area 517 display area 518 display area 800 display module 801 upper cover 802 lower cover 803 FPC
804 Touch panel 805 FPC
806 Display panel 809 Frame 810 Printed circuit board 811 Battery 850 IC
851 Drive circuit 852 Detection circuit 854 Capacitance element 2010 Information terminal 2011 Case 2012 Display unit 2013 Operation button 2014 External connection port 2015 Speaker 2016 Microphone 2020 Radio signal 2021 Radio signal 2030 Information terminal 2031 Case 2032 Display unit 2033 Crown 2034 Belt 2035 Detection Unit 2040 information terminal 2041 mounting unit 2042 case 2045 cable 2046 battery 2047 display unit 2048 imaging module 2050 notebook type personal computer 2051 case 2052 display unit 2053 keyboard 2054 pointing device 2070 video camera 2071 case 2072 display unit 2073 case 2074 operation Key 2075 Lens 2076 Connection part 2110 Portable game machine 2111 Case 21 2 Display unit 2113 Speaker 2114 LED lamp 2115 Operation key button 2116 Connection terminal 2117 Camera 2118 Microphone 2119 Recording medium reading unit 2150 Electric refrigerator / freezer 2151 Case 2152 Refrigeration room door 2153 Freezing room door 2154 Display unit 2170 Car 2171 Car body 2172 Wheel 2173 Dashboard 2174 Light 7000 Electronic component 7001 Lead 7002 Printed circuit board 7004 Circuit board 7100 Semiconductor wafer 7102 Circuit area 7104 Separation area 7106 Separation line 7110 Chip

Claims (9)

An electronic device having a control unit, a display adapter, and a display unit,
The control unit includes a memory, a wireless communication module, a GPS module, and a CPU.
The display adapter includes a first display controller, a second display controller, a first driver circuit, a second driver circuit, and a selection circuit,
The display unit has a first display area and a second display area,
The control unit is electrically connected to the display adapter,
The display adapter is electrically connected to the display unit,
In the control unit, the wireless communication module, the GPS module, the memory, and the CPU are electrically connected,
The control unit has a function of acquiring display information by the wireless communication module;
The control unit has a function of acquiring position information by the GPS module;
The control unit has a function of providing a flag for selecting and displaying the first display area and the second display area;
The control unit has a function of generating first display data to which the flag is given,
The control unit has a function of giving the first display data to the display adapter;
The selection circuit has a function of selecting the first or second display controller by the flag;
The display adapter is an electronic device having a function of giving the first display data to a display unit. In claim 1,
The memory of the control unit stores a program,
The program has a function of generating the first display data by performing arithmetic processing in the CPU using the position information and the display information.
The program has a function of giving a plurality of conditions to the flag,
The flag gives a function of causing the selection circuit to select the first display controller as a first flag condition,
The flag gives a function of causing the selection circuit to select the second display controller as a second flag condition,
The flag gives a function of causing the selection circuit to simultaneously select the first and second display controllers as a third flag condition,
The electronic control system according to claim 1, wherein the program has a function of giving the first display data to the display adapter via the CPU. In any one of Claim 1 or Claim 2,
The selection circuit included in the display adapter has a function of driving the driver circuit by selecting the display controller according to the flag condition,
The selection circuit has a function of selecting the first display controller according to the first flag condition and updating the display of the first display area,
The selection circuit has a function of selecting the second display controller according to the second flag condition and updating the display of the first display area,
The electronic device having a function in which the selection circuit selects the first and second display controllers according to the third flag condition and simultaneously updates the display of the first and second display areas. In any one of Claim 1 thru | or 3,
The display unit includes a plurality of pixels,
The pixel has a pixel circuit having a liquid crystal element and a pixel circuit having a light emitting element,
The liquid crystal element has a function of displaying the first display area,
A function of displaying the second display area by the light emitting element;
The display device, wherein the first display area is arranged so that the pixel surrounds the second display area. In any one of Claims 1 thru | or 4,
The program has a software development environment of source code, editor, compiler, debugger, or simulator,
The program has a function of giving the flag for selecting a display area to the condition parameter of the display area,
The electronic control system having a function in which the program updates the display of the first display area and the second display area by giving the flag to the display adapter via the CPU. In the transistor included in the electronic device according to claim 1, claim 3, or claim 4,
The transistor includes a metal oxide in a semiconductor layer. In claim 6,
The electronic device, wherein the transistor having a metal oxide in a semiconductor layer has a back gate. In any one of Claim 1, Claim 3, or Claim 4,
The light-emitting element includes an organic compound layer. An electronic device according to any one of claims 1, 3, or 4;
An operation key or battery,
An electronic device comprising:

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