Light emitting device

Abstract

To provide a light emitting device usable in a wide temperature range and usable under a low temperature environment and a high temperature environment.SOLUTION: A light-emitting device includes a light-emitting panel, a secondary battery, a circuit, and a sealing body. The light emitting panel has a light emitting element. The light-emitting element can emit light using electric power supplied from the secondary battery. The circuit has an antenna and can wirelessly charge the secondary battery. The sealing body has internally the light emitting panel, the secondary battery, and the circuit. The sealing body has a portion which transmits the light emitted by the light emitting element.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] One embodiment of the present invention relates to a light-emitting device having a light-emitting element and a secondary battery. The embodiment relates to a module and an electronic device using the light emitting device.

[0002] Note that one embodiment of the present invention is not limited to the above technical fields. More specifically, The technical field of one embodiment of the present invention is a semiconductor device, a display device, a light-emitting device, a power storage device, a storage device, a Examples of the devices include a memory device, an electronic device, a lighting device, and a driving method thereof or a manufacturing method thereof. Some examples include: [Background technology]

[0003] In recent years, light emitting devices are expected to be used for various purposes, and diversification is being demanded.

[0004] For example, in the case of a light-emitting device for use in a portable device, it is important that the device is thin, lightweight, and resistant to breakage. It is required to be difficult to do so.

[0005] Using electroluminescence (EL) The light-emitting element (also referred to as EL element) is easy to make thin and lightweight, and responds quickly to input signals. It has features such as being able to be operated using a low-voltage DC power supply, and is suitable for use in display devices and lighting. Applications to equipment are being considered.

[0006] For example, Patent Document 1 discloses a film substrate on which transistors and semiconductor devices as switching elements are mounted. A flexible active matrix type light emitting device having an organic EL element is disclosed. do.

[0007] Furthermore, secondary batteries are becoming increasingly important as driving power sources for portable devices. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2003-174153 A Summary of the Invention [Problem to be solved by the invention]

[0009] Since display devices and lighting devices are used in a variety of environments, light-emitting devices that can be used in a wide temperature range are required. For example, places exposed to direct sunlight such as car dashboards and windows, In a car parked under the blazing sun, in a high-temperature environment such as a desert, or in a cold region with glaciers, In a hot environment, the light emitting device may not operate normally.

[0010] An object of one embodiment of the present invention is to provide a light-emitting device that can be used in a wide temperature range. Another embodiment of the present invention has an object to provide a light-emitting device that can be used in a high-temperature environment. Another embodiment of the present invention is to provide a light-emitting device that can be used in a low-temperature environment. In particular, the present invention aims to provide a device that is thin, lightweight, or flexible and can be used at a certain temperature. An object is to provide a light emitting device with a wide range.

[0011] Another object of one embodiment of the present invention is to provide a small-sized light-emitting device. An object of one embodiment of the present invention is to provide a light-emitting device with high heat resistance. An object of one embodiment of the present invention is to provide a highly safe light-emitting device. An object of one embodiment of the present invention is to provide a light-emitting device with low power consumption. One aspect of the present invention is to provide a light-emitting device that can be used for a long time on a single charge. It shall be one.

[0012] The description of these problems does not preclude the existence of other problems. It is not necessary for the embodiment to solve all of these problems. It is possible to extract problems other than those mentioned above from the description of the claim. [Means for solving the problem]

[0013] One embodiment of the present invention includes a light-emitting panel, a secondary battery, a circuit, and a sealing body. a light-emitting element, the light-emitting element having a function of emitting light using power supplied from a secondary battery; The secondary battery has a portion overlapping with the light-emitting panel, the circuit has an antenna, and the antenna is The circuit has a function of wirelessly charging the secondary battery, and the sealing body has a portion overlapping with the optical panel. The light-emitting panel, the secondary battery, and the circuit are disposed inside the sealing body. It is a light-emitting device that has the function of transmitting light emitted by the light source.

[0014] In the above configuration, it is preferable that the secondary battery has a portion overlapping with the circuit. A portion of the antenna may be located between the light-emitting panel and the secondary battery.

[0015] The light-emitting element is capable of emitting light at least in one of an environment at 0°C and an environment at 100°C. For example, the light-emitting element has a pair of electrodes and a light-emitting layer. The light-emitting layer is located between the pair of electrodes and includes a light-emitting organic compound. The glass transition temperature is preferably 100° C. or higher.

[0016] The secondary battery supplies power to the light-emitting panel in at least one of an environment of 0°C and an environment of 100°C. For example, the secondary battery has a non-aqueous electrolyte and can supply The electrolyte includes an ionic liquid and an alkali metal salt, and the ionic liquid is an imidazolium calcium salt. It has a thione and an anion, and the alkali metal salt is preferably a lithium salt.

[0017] One embodiment of the present invention includes a light-emitting panel, a secondary battery, a circuit, and a sealing body. a light-emitting element, the light-emitting element having a function of emitting light using power supplied from a secondary battery; The light-emitting element can emit light in both 0°C and 100°C environments. The pond can supply power to the light-emitting panel in both 0℃ and 100℃ environments. The circuit has an antenna, the circuit has a function of wirelessly charging the secondary battery, and the sealing body A light-emitting panel, a secondary battery, and a circuit are disposed inside the sealing body, and at least a part of the sealing body is a light-emitting element. It is a light-emitting device having a function of transmitting light emitted by.

[0018] In each of the above configurations, it is preferable that the antenna has a portion overlapping with the light-emitting panel. In each of the above configurations, it is preferable that the secondary battery has a portion overlapping with the light-emitting panel. In each of the above configurations, it is preferable that the secondary battery has a portion overlapping with the circuit. For example, a part of the antenna may be located between the light-emitting panel and the secondary battery.

[0019] In each of the above configurations, a first switch is provided, and when the first switch is in an on state, the secondary The battery can supply power to the light-emitting panel, and when the first switch is in an off state, The line may be capable of wirelessly charging the secondary battery.

[0020] The light-emitting device according to one embodiment of the present invention may have a flexible portion. In the above configuration, a part or the whole of the light-emitting panel may be flexible. In each of the configurations, a part or the whole of the secondary battery may be flexible. In each configuration, a part or the whole of the sealing body may be flexible.

[0021] In each of the above configurations, the inside of the sealing body is preferably a reduced pressure atmosphere.

[0022] The light-emitting device according to one embodiment of the present invention may be usable in water at 0° C. The light emitting device of one embodiment may be capable of being used in water at 100°C.

[0023] In each of the above configurations, the light-emitting panel includes a second switch, a third switch, and a capacitance element. , the second switch is electrically connected to one electrode of the capacitor element, and the third switch The switch is electrically connected to the other electrode of the capacitance element, and the capacitance element is supplied with a voltage according to a video signal. The light-emitting element has a function of emitting light in response to a voltage, and the capacitor element has a function of holding a voltage During the period in which the second switch and the third switch are in a non-conducting state, It may be electrically isolated from the drive circuit used to supply the O signal.

[0024] Alternatively, in each of the above configurations, the light-emitting panel includes a first transistor and a second transistor. a gate of the first transistor, a third transistor, and a capacitance element. The first transistor is electrically connected to the first wiring, and one of the source and drain of the first transistor is connected to the second wiring. The other of the source and drain of the first transistor is electrically connected to the wiring of the The other of the source or drain of the first transistor is electrically connected to , electrically connected to the gate of the third transistor, and the source or drain of the second transistor One of the drains is electrically connected to the third wiring and is the source or drain of the second transistor. The other input is electrically connected to the other electrode of the capacitance element, and Or the other of the drains is electrically connected to one of the source or drain of a third transistor. The other of the source and the drain of the third transistor is electrically connected to a fourth wiring. The capacitor element has a function of holding a voltage corresponding to a video signal, and the light-emitting element has a function of storing a voltage corresponding to a video signal. In such a configuration, the capacitor element may have a function of holding a potential. During this period, the first transistor and the second transistor are in a non-conducting state, and the video The driver circuit used to supply the signal may be electrically isolated. During a period in which the potential of the second wiring is held, an operation of setting the potential of the second wiring to the potential of the first wiring; An operation of setting the potential of the wiring to the potential of the third wiring, and An operation of stopping the supply of potential to the wiring 4 may be performed.

[0025] In each of the above structures, the first transistor and the second transistor are each made of an oxide semiconductor. It is preferable to have a conductor.

[0026] Another embodiment of the present invention is a light-emitting device having any of the above structures, a touch sensor, and In addition, one aspect of the present invention is a module having any one of the above configurations. The light emitting device is equipped with an FPC (Flexible printed circuit) or Connectors such as TCP (Tape Carrier Package) are attached. Another embodiment of the present invention is a light-emitting device to which any of the above structures is applied. Modules with ICs mounted on them using the COG (Chip On Glass) method, etc. It is.

[0027] Further, an electronic device or a lighting device using a light-emitting device having any of the above structures is also one embodiment of the present invention. For example, one embodiment of the present invention is a light-emitting device or module having any of the above structures, An electronic device having a controller, a housing, a speaker, a microphone, an operation switch, or an operation button. be. Effect of the Invention

[0028] According to one embodiment of the present invention, a light-emitting device that can be used in a wide temperature range can be provided. According to one embodiment of the present invention, a light-emitting device that can be used in a high-temperature environment can be provided. According to one embodiment of the present invention, a light-emitting device that can be used in a low-temperature environment can be provided. In particular, it is possible to use a light-weight, thin, or flexible light-emitting device that can be used in a wide temperature range. A light device may be provided.

[0029] According to one embodiment of the present invention, a small-sized light-emitting device can be provided. According to one embodiment of the present invention, a light-emitting device having high heat resistance can be provided. According to one embodiment of the present invention, a highly safe light-emitting device can be provided. In addition, a light-emitting device with low power consumption can be provided. It is possible to provide a light emitting device that can be used for a long period of time by charging.

[0030] The description of these effects does not preclude the existence of other effects. An embodiment does not necessarily have all of these effects. It is possible to extract other effects from the description in the section. [Brief description of the drawings]

[0031] [Figure 1] 1A and 1B are diagrams illustrating an example of a light-emitting device. [Diagram 2] 1A and 1B are diagrams illustrating an example of a light-emitting device. [Diagram 3] 1A and 1B are diagrams illustrating an example of a light-emitting device. [Figure 4] 1A and 1B are diagrams illustrating an example of a light-emitting device. [Diagram 5] FIG. 1 is a diagram showing an example of a light-emitting panel. [Figure 6] FIG. 1 is a diagram showing an example of a light-emitting panel. [Figure 7] FIG. 1 is a diagram showing an example of a light-emitting panel. [Figure 8] FIG. 1 illustrates an example of a secondary battery. [Figure 9] FIG. 1 illustrates an example of a secondary battery. [Figure 10] FIG. 2 illustrates an example of a circuit included in a light-emitting panel. [Figure 11] FIG. 2 illustrates an example of a circuit included in a light-emitting panel. [Figure 12] FIG. 2 illustrates an example of a circuit included in a light-emitting panel. [Figure 13] FIG. 2 illustrates an example of a circuit included in a light-emitting panel. [Figure 14] FIG. 2 is a diagram showing an example of a driver circuit. [Figure 15] FIG. 13 is a diagram showing an example of a display circuit. [Figure 16] FIG. 1 is a diagram showing an example of a light-emitting panel, etc. [Figure 17] FIG. 1 is a diagram showing an example of a light-emitting panel, etc. [Figure 18] FIG. 1 is a diagram showing an example of a light-emitting panel, etc. [Figure 19] 1A and 1B are diagrams showing examples of use of a light-emitting panel. [Figure 20] 1A and 1B are diagrams illustrating examples of electronic devices. [Figure 21] 1A and 1B are diagrams illustrating examples of electronic devices. [Figure 22] FIG. 2 is a diagram showing an example of a pixel circuit. [Diagram 23] FIG. 2 is a diagram showing an example of a pixel circuit. [Figure 24] FIG. 2 is a diagram showing an example of a pixel circuit. [Diagram 25] FIG. 2 is a diagram showing an example of a pixel circuit. [Figure 26] FIG. 1 illustrates an example of a display device. [Figure 27] FIG. 1 illustrates an example of a display device. [Figure 28] FIG. 4 is a diagram showing an example of a shutter. [Figure 29] FIG. 4 is a diagram showing an example of a control circuit. [Diagram 30] 1A and 1B are diagrams showing light-emitting elements according to an embodiment of the present invention; [Diagram 31] FIG. 2 is a diagram showing a secondary battery according to an embodiment. [Diagram 32] FIG. 2 is a diagram showing a secondary battery according to an embodiment. [Diagram 33] FIG. 2 is a diagram showing a secondary battery according to an embodiment. [Diagram 34] FIG. 4 is a graph showing charge / discharge characteristics of the secondary battery of the embodiment. [Diagram 35] 1 is a photograph showing a light emitting device according to an embodiment of the present invention. [Diagram 36] 1 is a photograph showing a light emitting device according to an embodiment of the present invention. [Figure 37] 1 is a photograph showing a light emitting device according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] The embodiment will be described in detail with reference to the drawings. However, the present invention is not limited to the following description. The present invention is not limited to the above embodiment, and various changes and modifications may be made in the form and details without departing from the spirit and scope of the present invention. It will be easily understood by those skilled in the art that the above-mentioned invention can be obtained by the following embodiments. It should not be construed as being limited to the contents described.

[0033] In the configuration of the invention described below, the same parts or parts having similar functions are referred to as the same parts. The same reference numerals are used in common among different drawings, and the repeated explanations are omitted. When referring to a function, the same hatch pattern may be used and no particular reference number may be given.

[0034] In addition, the position, size, range, etc. of each component shown in the drawings are not necessarily the same as in the actual embodiment, in order to facilitate understanding. Therefore, the disclosed invention may not necessarily represent the position, size, range, etc. Furthermore, the present invention is not limited to the position, size, range, etc. disclosed in the drawings.

[0035] The words "film" and "layer" may be interchangeable depending on the circumstances. For example, the term "conductive layer" can be replaced with "conductive film" Alternatively, for example, the term "insulating film" can be changed to " The term "insulating layer" may be changed to "insulating layer."

[0036] (Embodiment 1) In this embodiment, a light-emitting device of one embodiment of the present invention will be described with reference to FIG.

[0037] The light-emitting device 100 shown in FIG. 1A includes a light-emitting panel 10, a secondary battery 20, a circuit 30, and an encapsulation The sealing body 40 has the light-emitting panel 10, the secondary battery 20, and the circuit 3 therein. The light-emitting panel 10, the secondary battery 20, and the circuit 30 are disposed in the sealing region 40 of the sealing body 40. It is sealed by 1.

[0038] In this specification and the like, among the elements of the light-emitting device according to one embodiment of the present invention, the inside of the encapsulant 40 The elements located in the sealing region 41 and sealed by the sealing region 41 are collectively referred to as sealed bodies. For example, the light-emitting panel 10, the secondary battery 20, and the circuit 30 shown in FIG. 1A are sealed bodies. An example of the connection relationship of the sealed bodies is shown in the block diagram in FIG.

[0039] The light-emitting panel 10 includes a light-emitting element 11. The light-emitting element 11 is supplied with light from a secondary battery 20. It has the function of emitting light using the power generated.

[0040] It is preferable that the light emitting element 11 is capable of emitting light in an environment of 0° C. It is preferable that the light-emitting panel 11 is capable of emitting light in an environment of 100° C. The LED 10 may have a function of emitting light using power supplied from a source other than the secondary battery 20.

[0041] The secondary battery 20 has a portion overlapping with the light-emitting panel 10 .

[0042] The secondary battery 20 is preferably capable of supplying power to the light-emitting panel 10 in an environment of 0° C. In addition, the secondary battery 20 is capable of supplying power to the light-emitting panel 10 in an environment of 100° C. It is preferable that the secondary battery 20 can supply power to devices other than the light-emitting panel 10. The present invention may have a function of

[0043] The circuit 30 has an antenna 31. The antenna 31 has a portion overlapping with the light-emitting panel 10. The circuit 30 can wirelessly (or non-contactly) charge the secondary battery 20. .

[0044] The light-emitting panel 10 and the circuit 30 overlap each other, and the light-emitting panel 10 and the secondary battery 20 are By having the overlapping portions, it is possible to reduce the size of the light emitting device 100. The light-emitting panel 10, the secondary battery 20, and the circuit 30 may be provided with overlapping portions. It is also preferable that the shorter the perimeter of the sealing region 41, the lower the probability that the seal will be broken. This is preferable since it is possible to suppress a decrease in the reliability of the light emitting device.

[0045] It is preferable that the secondary battery 20 has a portion overlapping with the circuit 30. For example, the antenna 31 At least a part of the antenna 31 may overlap with the secondary battery 20. For example, the antenna 31 is disposed between the light emitting device and the secondary battery 20 so that the antenna 31 is not easily visible to the user of the light emitting device. By stacking the light-emitting panel 10, the secondary battery 20, and the circuit 30 so that This is preferable because it can prevent the appearance from being damaged. The antenna 31 receives power from an external antenna via the light-emitting panel 10.

[0046] The light-emitting element included in the light-emitting device of one embodiment of the present invention was subjected to the same temperature control under an environment of 0° C. and an environment of 100° C. In addition, the secondary battery included in the light-emitting device of one embodiment of the present invention can emit light. It is possible to supply power to the light-emitting panel in both 0℃ and 100℃ environments. Therefore, the light-emitting device according to one embodiment of the present invention can be used in both low-temperature and high-temperature environments. In addition, the light-emitting device according to one embodiment of the present invention can be used in a wide temperature range (for example, from 0° C. to 100° C., Preferably, the temperature is between -25°C and 150°C, more preferably between -50°C and 200°C. The light-emitting device of one embodiment of the present invention may be used either indoors or outdoors.

[0047] A light-emitting device according to one embodiment of the present invention includes a light-emitting panel and a secondary battery inside a sealed body. If the usable temperature range of the element or secondary battery is narrow, it may be difficult to use it in a low-temperature or high-temperature environment. The temperature of the operating environment may affect the operation of the light-emitting device. In order to reduce this, for example, the sealing body needs to have sufficiently high heat resistance and sufficiently low thermal conductivity. On the other hand, in the light-emitting device of one embodiment of the present invention, the light-emitting element and the secondary battery are heated to 0° C. Since the device can operate at temperatures up to 100°C, the heat resistance and thermal conductivity requirements for the encapsulation are strict. The range of materials that can be used for the encapsulation is wide. In place of glass, organic resins and the like can be used. This allows the light-emitting device to be made thinner, It is possible to make the device lighter or more flexible.

[0048] The light-emitting device according to one embodiment of the present invention can charge a secondary battery by using non-contact power transmission. Therefore, there is no need to remove the secondary battery from the encapsulation when charging it. Since it is not necessarily necessary to provide fasteners such as fasteners, sealing performance can be improved.

[0049] The light emitting device may have a switch. In FIG. 1(C) and (D), A light-emitting panel 10, a secondary battery 20, a circuit 30, a circuit 50, and a switch 51 are shown.

[0050] As shown in FIG. 1C, when the switch 51 is in the off state, the circuit 30 wirelessly As shown in FIG. 1(D), when the switch 51 is in the on state, In addition, the secondary battery 20 can supply power to the light-emitting panel 10 .

[0051] Below, each element of the light-emitting device of one embodiment of the present invention will be described in detail.

[0052] <Light-emitting panel 10> The light-emitting panel 10 has a light-emitting element 11. The light-emitting panel also has a detection device such as a touch sensor. An example of the configuration of light-emitting panel 10 will be described in detail in the second embodiment.

[0053] The light-emitting panel 10 has active elements (active elements, nonlinear elements) in the pixels. Use a passive matrix method that does not have active elements in the pixels. can be done.

[0054] The light-emitting panel 10 may be flexible. For example, the support substrate and the sealing substrate of the light-emitting element 11 may be flexible. By using a film for at least one of the substrates, the flexibility of the light-emitting panel 10 is increased. It is possible.

[0055] The light emitting element 11 is an element capable of emitting light in both low-temperature and high-temperature environments. The low temperature environment is, for example, an environment of -100°C or higher and 0°C or lower, preferably - An environment between 100℃ and -25℃, and more preferably between -100℃ and -50℃, is recommended. The high temperature environment is, for example, an environment of 100° C. or higher and 300° C. or lower, preferably The temperature range is preferably 150°C to 300°C, and more preferably 200°C to 300°C. The light emitting element 11 can be used not only in a low temperature environment or a high temperature environment, but also in a temperature higher than 0° C. For example, the light emitting element 11 can be made to emit light in an environment of less than 00° C. It can emit light at temperatures below 30°C.

[0056] The light emitting element 11 may be a self-emitting element, which can be turned on or off by a current or voltage. The category includes devices whose brightness can be controlled. For example, light-emitting diodes (LEDs), In addition, the present invention is not limited to light-emitting elements, but may be applied to display elements. can also be applied.

[0057] The higher the heat resistance of the light emitting element 11, the more preferable it is. For example, when an organic EL element is used as the light emitting element 11, In this case, the glass transition temperature of each organic compound contained in the organic EL element is 100°C or higher and 300°C or lower. °C or less, and more preferably 150°C to 300°C.

[0058] In a light-emitting device according to one embodiment of the present invention, an antenna receives power from an external antenna through a light-emitting panel. Therefore, it is preferable that the thickness of the pair of electrodes of the light emitting element 11 is as thin as possible. The sum of the electrode thicknesses is 1 μm or less, preferably 500 nm or less, and more preferably 350 nm or less. Preferably, the thickness is 250 nm or less.

[0059] <Secondary battery 20> The secondary battery 20 is capable of supplying power to the light-emitting panel 10 in both low-temperature and high-temperature environments. It is preferable to use a secondary battery that can withstand low temperatures. ℃ or lower, preferably -100 ℃ or higher and -25 ℃ or lower, more preferably -100 Examples of high-temperature environments include environments of 100°C or higher and 30°C or lower. An environment of 0°C or less, preferably an environment of 150°C to 300°C, more preferably an environment of 200°C The secondary battery 20 can be placed in a low temperature environment or a high temperature environment. It can be used not only in environments where the temperature is higher than 0°C but also below 100°C. For example, The battery 20 can be used at room temperature (20° C. or higher and 30° C. or lower).

[0060] The secondary battery 20 is, for example, a lithium polymer battery (lithium Lithium-ion secondary batteries such as lithium-ion polymer batteries, nickel-metal hydride batteries, nickel-cadmium batteries, These include organic radical batteries, lead-acid batteries, air secondary batteries, nickel-zinc batteries, and silver-zinc batteries. can be.

[0061] By using lithium-ion secondary batteries that can realize high energy density, the light-emitting device can be made lighter. This is preferable because it allows for a reduction in size and complexity.

[0062] For example, a secondary battery having a non-aqueous electrolyte can be used. Ionic liquids are non-flammable and non-volatile. Therefore, it is possible to realize a secondary battery with high heat resistance. For example, the ionic liquid is an imidazolium cation. It is preferable that the alkali metal salt has an anion and an ion. The alkali metal salt is preferably a lithium salt. It is preferable that there is.

[0063] Secondary batteries that use gel electrolytes and all-solid-state secondary batteries that use solid electrolytes have the advantages of heat resistance and safety. It is highly resistant and preferable.

[0064] The secondary battery 20 may be of various types, such as a coin type (single-layer flat type), a cylindrical type, a thin type, a square type, or a sealed type. In addition, a secondary battery having a plurality of positive electrodes, negative electrodes, and separators can be used. Alternatively, the positive electrode, the negative electrode, and the separator may be wound (wound type). .

[0065] The secondary battery 20 may be flexible. For example, by using a film for the exterior body, The flexibility of the secondary battery 20 can be improved. and an electrolyte (or an electrolyte solution).

[0066] In the light emitting device, the light emitting element 11 and the secondary battery 20 may be arranged in a stacked manner. The larger the overlapping area between the optical element 11 and the secondary battery 20, the more efficient the use of heat generated by the light emitting element 11. The secondary battery 20 can be heated over a wide range. Even when a secondary battery, which is difficult to charge, is used, the reliability of the light emitting device can be improved.

[0067] A configuration example of the secondary battery 20 will be described in detail in the third embodiment.

[0068] <Circuit 30> The circuit 30 includes an antenna 31. The circuit 30 further includes a controller 32. This is also fine.

[0069] The antenna 31 can receive power from an external antenna (for example, an antenna 61 of a charger). The antenna 31 may receive power from an external antenna via the light-emitting panel 10. Alternatively, the antenna 31 may receive power from an external antenna via the secondary battery 20.

[0070] The controller 32 converts the power received by the antenna 31 into the power to be supplied to the secondary battery 20. and outputting the converted voltage to the secondary battery 20. For example, the controller 32 has a function of converting the converted voltage into an ACD In this case, the power received by the antenna 31 may function as a C converter. The electric power is converted into DC power and output to the secondary battery 20 .

[0071] In the light emitting device of this embodiment, the antenna 61 (primary coil) of the charger and the antenna of the light emitting device are The secondary coil is magnetically coupled to the magnetron 31 (secondary coil), and the secondary coil is energized by the AC magnetic field generated by the primary coil. The power is transmitted to the secondary coil without contact by electromagnetic induction, which generates a voltage in the secondary coil. The charging method is not limited to the electromagnetic induction method.

[0072] The use of the antenna of the light emitting device is not limited to contactless charging of the secondary battery. For example, the light emitting device may be provided with an antenna and a memory to transmit and receive electronic data. Depending on the data, the light-emitting panel 10 may display images, information, etc. An antenna may be provided with the S function to obtain location information and GPS time.

[0073] For safety reasons, it is necessary not to expose the input / output terminals for charging or discharging the secondary battery on the surface of the light-emitting device. If the input / output terminals are exposed, rain or other water may cause a short circuit. There is a risk of electric shock if the input / output terminal comes into contact with the human body. Since the secondary battery can be charged by contact, the input / output terminals are not exposed on the surface of the light-emitting device. It can be said that it is completed.

[0074] <Sealing body 40> The encapsulated body 40 has therein encapsulated objects such as the light-emitting panel 10, the secondary battery 20, and the circuit 30. The sealing body 40 has a sealing region 41. The object to be sealed is sealed by the sealing region 41. 0 and isolated from the outer atmosphere.

[0075] For example, the sealing body 40 is laminated (such as a pouch) to form the sealing region 41. If the sealed object is directly inserted into the sealing body 40 and sealed, The surface of the light emitting device may become uneven due to its shape. When the light emitting device is placed in a case such as a sealing body 40 and sealed, the surface of the light emitting device is flattened. It is possible and preferable.

[0076] In addition, a fastener such as a zipper may be used in the sealing area 41. For example, The device is unzipped, the light-emitting panel 10 and the secondary battery 20 are replaced, and then resealed. A stoppage may be performed.

[0077] The sealing body 40 may be flexible. For example, a film may be used for the sealing body 40. Therefore, the flexibility of the encapsulant 40 can be increased.

[0078] The material of the seal 40 is not particularly limited as long as it can withstand the temperature of the usage environment. The stopper 40 is formed using various materials such as glass, organic resin, plastic, metal, etc. can.

[0079] For example, the sealing body 40 is made of polyethylene television, which is flexible and transparent to visible light. Polyester resins such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN), Riacrylonitrile resin, polyimide resin, polymethyl methacrylate resin, polycarbonate Polyethersulfone (PC) resin, Polyethersulfone (PES) resin, Polyamide resin, Cyclohexyl ether olefin resin, polystyrene resin, polyamide-imide resin, polyvinyl chloride resin, arami For example, a resin such as acrylic resin can be used.

[0080] It is preferable that the sealing body 40 is highly waterproof. By suppressing the intrusion of components, the reliability of the light emitting device can be improved.

[0081] <Circuit 50> The circuit 50 converts the power supplied from the secondary battery 20 into power that causes the light emitting element 11 to emit light. For example, the output voltage of the secondary battery 20 is required for the light emitting element 11 to emit light. The power supply may have a function of converting (stepping up or stepping down) the voltage to be supplied.

[0082] The circuit 50 may also have a function of controlling the timing at which the light emitting element 11 emits light. For example, the light emitting element 11 may have a function of driving the light emitting element 11 so that the light emitting element 11 blinks. good.

[0083] The circuit 50 also generates a signal for driving the light-emitting panel 10 and outputs the signal to the light-emitting panel 10. The circuit 50 may have a function of outputting a signal line driver circuit or a scanning line driver circuit. The light-emitting panel 10 may also have a signal line driving circuit and a scanning line driving circuit. stomach.

[0084] <Switch 51> The switch 51 is electrically connected to the circuit 50. The switch 51 is also 20. The switch 51 is also electrically connected to the circuit 30. There are.

[0085] The switch 51 is not particularly limited, and may be, for example, an electrical switch, a mechanical switch, or the like. Specifically, transistors, diodes, magnetic switches, mechanical Examples of the switch include a switch having a contact.

[0086] 2(A) and (B) show specific examples of the object to be sealed. FIG. 2(A) shows the surface (light-emitting surface) of the object to be sealed. ) and FIG. 2(B) shows the back surface of the object to be sealed.

[0087] 2A and 2B show an example in which a laminated type secondary battery is used as the secondary battery 20. As shown in FIG. 2B, the center of the secondary battery 20 is a portion where multiple electrodes are laminated. and is thicker than the ends.

[0088] The electrode 21a is electrically connected to one of the positive and negative electrodes of the secondary battery. , is electrically connected to the other of the positive electrode or the negative electrode of the secondary battery.

[0089] The electrodes 21a and 21b are bent via the circuit board 55 and connected to the terminal 33 on the circuit board 55. a and 33b, respectively.

[0090] The circuit board 55 is provided with elements (electronic components) constituting the circuit 30, the circuit 50, etc. shown in FIG. 1(C) and the like. The circuit board 55 is provided with, for example, a capacitance element, a resistance element, The circuit board 55 is provided with electronic components such as a resistor, a resistor element, a switch element, etc. A printed circuit board may be used.

[0091] In addition, a switch 51 is provided on the circuit board 55. Here, a magnetic switch is used as the switch 51. The switch is turned on and off by attaching and detaching a magnet. Can be switched off.

[0092] The antenna 31 is electrically connected to a terminal 34 on the circuit board 55. A part of the light emitting device is located between the secondary battery 20 and the light emitting panel 10. The antenna 31 has a portion overlapping with the light-emitting panel 10. The antenna 31 also has a secondary It has a portion that overlaps with the battery 20.

[0093] The antenna 31 can receive power from an external antenna via the light-emitting panel 10.

[0094] In the light-emitting panel 10, the terminal 12a is electrically connected to one of the anode and the cathode of the light-emitting element 11. The terminal 12b is electrically connected to the other of the anode and the cathode of the light-emitting element 11. The terminals 12a and 12b function as an anode and a cathode of the light emitting element 11, respectively. This is also fine.

[0095] The terminal 12a is electrically connected to a terminal 52a on a circuit board 55 via a wiring 53a. The terminal 12b is electrically connected to a terminal 52b on a circuit board 55 via a wiring 53b. is.

[0096] In the light-emitting device according to one embodiment of the present invention, the secondary battery and the antenna are each independently provided on a light-emitting panel. There is also a portion where the secondary battery and the circuit overlap. ), for example, part of the antenna is located between the light-emitting panel and the secondary battery. Good too.

[0097] As described above, the light emitting device is made up of the secondary battery, the light emitting panel, the circuit board, the antenna, etc. When at least two of the elements have overlapping portions, the light emitting device can be made smaller. In addition, the shorter the perimeter of the sealing area, the lower the probability of the sealing being broken. This is preferable because it is possible to suppress a decrease in the reliability of the light emitting device.

[0098] For example, the secondary battery 20 may be disposed in a position that is smaller than the light-emitting panel 10, the circuit board 55, and the antenna 31. It is preferable that the two overlap at least one of the two. As shown in FIG. 1, the secondary battery 20 is connected to the light-emitting panel 10, the circuit board 55, and the antenna 31. It is particularly preferable that they have overlapping portions with each other.

[0099] The environment in which the light-emitting device of one embodiment of the present invention can be used is not limited to the air atmosphere. The light emitting device can be used, for example, in water at temperatures between 0°C and 100°C. The temperature range in which the secondary battery can be used is wide, and the light emitting element and the secondary battery are sealed with a sealant. Therefore, the light-emitting device according to one embodiment of the present invention is highly reliable even when used underwater. Reliability can be ensured.

[0100] 3(A) to 3(F) are each a schematic cross-sectional view of a light-emitting device according to one embodiment of the present invention.

[0101] As shown in FIGS. 3(A) to 3(F), the light emitting device includes a light emitting panel 10, a secondary The light-emitting panel 10 includes a battery 20 and a circuit 30. The light-emitting panel 10, the secondary battery 20, and the circuit 30 are sealed. It is sealed by a sealing area 41 of the stopper.

[0102] The space 42 sealed by the sealing region 41 is a reduced pressure atmosphere or an inert atmosphere. By using these atmospheres, the light-emitting panel 1 can be more effectively used than in the case of an air atmosphere. It is possible to improve the reliability of 0 etc.

[0103] FIG. 3A shows an example in which a sealing body 40a that transmits visible light is used. The light emitted by the light emitting element of the panel 10 can be transmitted through the sealing body 40. Through a, the light-emitting panel 10, the secondary battery 20, and the circuit 30 can be seen.

[0104] In one embodiment of the present invention, the encapsulant may be formed as small as possible, except for the portion overlapping the light-emitting region of the light-emitting panel 10. For example, in FIG. 3(B) and (C), the light-emitting panel of the sealing body is A sealing body 40a that transmits visible light is used in the portion overlapping with the light-emitting region of the module 10, and a sealing body 40b that transmits visible light is used in the other portion. An example using a sealing body 40b that blocks visible light is shown. The sealing body 40b blocks visible light, so that the user can Therefore, the secondary battery 20 and the circuit 30 can be made invisible.

[0105] In addition, in Figs. 3(A) and (B) and the like, the secondary battery 20 and the light-emitting panel are arranged in a direction parallel to the light-emitting surface of the light-emitting device. In the above embodiment, the secondary battery 20 and the circuit 30 overlap each other. As shown in FIG. 1C, the light-emitting panel 10 and the circuit 30 may be configured to overlap each other. Instead of 30, a circuit board 55 shown in FIG.

[0106] The light-emitting device has one light-emitting panel 10, one secondary battery 20, and one circuit 30. For example, as shown in FIG. 3(D), In addition, the light emitting device may have two light emitting panels 10. Also, the light emitting device may be a double-sided light emitting device. If a two-sided light-emitting panel 10 is used, a two-sided light-emitting device can be formed with one light-emitting panel 10. It can also be made.

[0107] As shown in FIG. 3D, the light-emitting device includes a light-emitting panel 10, a secondary battery 20, and The circuits 30 do not need to have overlapping portions when viewed from the light emitting surface of the light emitting device.

[0108] As shown in FIG. 3(E), FIG. 4(A), and FIG. 4(B), the light emitting device may have a plurality of spaces. FIG. 4A is a plan view of the light emitting device shown in FIG. 3E, seen from the sealing body 40a side. FIG. 4(B) is a perspective view of the light emitting device shown in FIG. 3(E) when it is folded. The components may be arranged separately between the sealing region 41 and the sealing region 42. Wires 45 connecting the components may overlap. This area is flexible. As shown in FIG. 4B, the light emitting device has a flexible region 70. In this way, the light emitting device may have flexibility. When at least one of the panel 10, the secondary battery 20, and the circuit 30 is flexible One or more of the electrodes may be bent to deform the light emitting device.

[0109] In FIG. 3E, the space 42a including the light-emitting panel 10, the secondary battery 20, and the circuit 30 are The light-emitting panel 10 is connected to the wiring 45. Therefore, it is electrically connected to the secondary battery 20 and the circuit 30, respectively.

[0110] As shown in FIG. 3F, the light-emitting panel 10, the secondary battery 20, and the circuit 30 are It is preferable that the edges of each of the light-emitting panel 10, the secondary battery 20, and the circuit board 11 are chamfered. Since the seal can be prevented from being broken at the corners of the circuit 30, a film or the like is used for the seal. In addition, deterioration in the reliability of the light emitting device can be suppressed.

[0111] The light emitting device may have a double sealing region. A sealing region 41b may be provided surrounding the region 41a to double-seal the light-emitting panel 10 and the like. By providing two or more layers of insulation, the reliability of the light emitting device can be improved.

[0112] Note that the light-emitting device of one embodiment of the present invention may be used as a display device or a lighting device. For example, a light source such as a backlight or a frontlight, i.e., a display device It may also be used as a lighting device for

[0113] In addition, the light-emitting device according to one embodiment of the present invention may further include another semiconductor circuit, for example, a semiconductor device for preventing overcharging. Control circuits, image sensors, gyro sensors, acceleration sensors, and other sensors, touch panels, etc. For example, an image sensor may be mounted to display a captured image on a light-emitting panel. In addition, by installing a touch panel, it is possible to display the desired position of the touch panel. By touching the screen, you can operate electronic devices and input information. By installing a CPU, it is possible to realize a computer that can be used over a wide temperature range. .

[0114] In addition, the light-emitting device according to one embodiment of the present invention may include a bell for fixing to the arm or wrist of a human body or a robot. The part where the device is attached is not limited to any part of the human body or robot. The device may be attached, for example, to the waist or ankle.

[0115] The light-emitting device of one embodiment of the present invention has the following features: it has a secondary battery, can be used in a wide temperature range, and the like. Therefore, it can be suitably used as a light emitting device for portable use.

[0116] This embodiment mode can be combined with other embodiment modes as appropriate.

[0117] (Embodiment 2) In this embodiment, a light-emitting panel that can be used in a light-emitting device of one embodiment of the present invention will be described. The following description will be given with reference to Figs. 5 to 7. In this embodiment, an organic EL element is used as the light emitting element. An example of such a case will be given below.

[0118] An organic EL element is a device that contains a light-emitting organic compound between a pair of electrodes (a lower electrode and an upper electrode). A layer (also referred to as an EL layer) is provided between the lower electrode and the upper electrode. When a voltage higher than 100 V is applied, holes are injected into the EL layer from the anode side and electrons are injected from the cathode side. The injected electrons and holes recombine in the EL layer, and the luminescent material contained in the EL layer emits light. It shines.

[0119] Organic EL elements are classified into top emission type, bottom emission type, and dual emission type. The electrode on the light extraction side is made of a conductive film that transmits visible light. In addition, it is preferable to use a conductive film that reflects visible light for the electrode on the side from which light is not extracted. It is.

[0120] It is preferable to use an organic compound having high heat resistance for the EL layer. For example, a glass transition temperature is 100°C or higher and 300°C or lower, preferably 150°C or higher and 300°C or lower, more preferably 2 Organic compounds with a temperature range of 00°C to 300°C are used. Low molecular weight compounds and polymeric compounds are used for the EL layer. Any suitable compound may be used, including inorganic compounds.

[0121] The layers that make up the EL layer are formed by deposition (including vacuum deposition), transfer, printing, inkjet, and other methods. The layer can be formed by a jet method, a coating method, or the like.

[0122] The EL layer has at least a light-emitting layer. The light-emitting layer contains a light-emitting organic compound. The glass transition temperature of the organic compound is preferably 100° C. or higher and 300° C. or lower, and more preferably 150° C. or lower. It is more preferable that the temperature is 200°C or higher and 300°C or lower. Even more preferred.

[0123] There is no particular limitation on the material contained in the EL layer. As the guest material, for example, N,N'-biphenyl Bis(3-methylphenyl)-N,N'-bis[3-(9-phenyl-9H-fluorene 9-yl)phenyl]-pyrene-1,6-diamine (abbreviation: 1,6mMemFLPAPr n), N,N'-bis(dibenzofuran-4-yl)-N,N'-diphenyl-pyrene- 1,6-diamine (abbreviation: 1,6FrAPrn-II), (acetylacetonato)bis( 6-tert-Butyl-4-phenylpyrimidinato)iridium(III) (abbreviation: [I r(tBuppm)2(acac)]), (acetylacetonato)bis(4,6-diphenyl Nylpyrimidinato)iridium(III) (abbreviation: [Ir(dppm)2(acac)] ), bis{4,6-dimethyl-2-[3-(3,5-dimethylphenyl)-5-phenyl -2-pyrazinyl-κN]phenyl-κC}(2,6-dimethyl-3,5-heptanedioate Nat-κ2O,O')iridium(III) (abbreviation: [Ir(dmdppr-P)2(d Examples of highly heat-resistant materials include those using SUS304, SUS304R and SUS304N.

[0124] The EL layer is made of a material having a high hole injection property, a material having a high hole transport property, and a hole Block material, material with high electron transporting property, material with high electron injecting property, or bipolar material The insulating layer may further include a layer containing a substance having high electron-transporting and hole-transporting properties.

[0125] The material having a high hole transporting property is not particularly limited, but for example, N-(1,1'-biphenyl) -N-[4-(9-phenyl-9H-carbazol-3-yl)phenyl ]-9,9-Dimethyl-9H-fluoren-2-amine (abbreviation: PCBBiF), 4,4 ',4''-(1,3,5-benzenetriyl)tri(dibenzothiophene) (abbreviation: D Examples of highly heat-resistant materials include those with high thermal resistance such as BT3P-II.

[0126] The material having high electron transporting properties is not particularly limited. For example, 2,9- Di(2-naphthyl)-4,7-diphenyl-1,10-phenanthroline (abbreviation: NBP A layer containing hen and a layer containing a condensed aromatic compound or a condensed heteroaromatic compound are laminated. By doing so, the heat resistance of the organic EL element can be improved. Since the layer has a electron transport property, it is preferably provided on the cathode side rather than the light emitting region. The layer containing NBPhen contains a condensed aromatic compound or a condensed heteroaromatic compound. The surface opposite to the surface in contact with the layer may be in contact with an electron injection layer or a cathode.

[0127] The condensed aromatic compounds or condensed heteroaromatic compounds include compounds having a condensed ring skeleton of three or more rings. The interface between the compound having a condensed ring skeleton of three or more rings and NBPhen is preferably thermally -Because it is electrically very stable.

[0128] The light-emitting element of the present embodiment exhibits little decrease in luminance even when stored in a high-temperature environment. When a layer containing a complex aromatic compound is used, it is possible to suppress changes in driving voltage. .

[0129] When a fused heteroaromatic compound is used, the fused heteroaromatic compound has one fused ring skeleton. The structure containing two nitrogen atoms in the compound can provide a light-emitting element with good reliability. This is also preferable since it contributes to reducing the driving voltage.

[0130] The condensed heteroaromatic compound may be used as a host material for a phosphorescent material or as an electron transport material adjacent to a phosphorescent light-emitting layer. Since the light-emitting element is suitable as a material for the layer, the light-emitting element is a light-emitting element that exhibits phosphorescence. In addition, a phosphorescent device having the above-described configuration has improved heat resistance and is highly reliable in emitting light. It can be used as a device, and has high luminous efficiency and high reliability due to the use of phosphorescence. It is possible to provide a light emitting element having the above structure.

[0131] The condensed aromatic compound is, for example, 9-phenyl-3-[4-(10-phenyl-9- anthryl)phenyl]-9H-carbazole (abbreviation: PCzPA), 3-[4-(1- naphthyl)-phenyl]-9-phenyl-9H-carbazole (abbreviation: PCPN), 9- [4-(10-phenyl-9-anthracenyl)phenyl]-9H-carbazole (abbreviation : CzPA), 7-[4-(10-phenyl-9-anthryl)phenyl]-7H-dibenzyl Benzo[c,g]carbazole (abbreviation: cgDBCzPA), 6-[3-(9,10-diphenyl (2-phenyl-2-anthryl)phenyl]-benzo[b]naphtho[1,2-d]furan (abbreviation :2mBnfPPA), 9-phenyl-10-{4-(9-phenyl-9H-fluorene -9-yl)-biphenyl-4'-yl}-anthracene (abbreviation: FLPPA) and other anthracenes tetracene compounds and 5,12-bis(2,4-diphenylphenyl)tetracene Compounds having a condensed ring skeleton of three or more rings, such as helical compounds, are preferred. The sen compounds are particularly preferred because they are likely to provide light-emitting devices with long life.

[0132] Condensed heteroaromatic compounds include, for example, 2-[3-(dibenzothiophen-4-yl) Phenyl]-1-phenyl-1H-benzimidazole (abbreviation: mDBTBIm-II) Heterocyclic compounds with polyazole skeletons such as 2-[3-(dibenzothiophene-4 -yl)phenyl]dibenzo[f,h]quinoxaline (abbreviation: 2mDBTPDBq-II ), 2-[3'-(dibenzothiophen-4-yl)biphenyl-3-yl]dibenzo[ f,h]quinoxaline (abbreviation: 2mDBTBPDBq-II), 2-{3-[3-(2, 8-Diphenyldibenzothiophene-4-yl)phenyl]phenyl}dibenzo[f,h ]quinoxaline (abbreviation: 2mDBTBPDBq-III), 2-[3'-(9H-carba 2-(2-phenyl-9-yl)biphenyl-3-yl]dibenzo[f,h]quinoxaline (abbreviation: mCzBPDBq) and other condensed heterocyclic compounds with a diazine skeleton, such as 2-[ 3-(Dibenzothiophen-4-yl)phenyl]dibenzo[f,h]quinoline (abbreviation: 2mDBTPDBQu-II), 2-{3-[3-(dibenzothiophen-4-yl)phenyl phenyl]phenyl}dibenzo[f,h]quinoline (abbreviation: 2mDBTBPDBQu-II Among the above, diazide ... Heterocyclic compounds having an isidine skeleton and heterocyclic compounds having a pyridine skeleton have good reliability. In particular, heterocyclic compounds having a diazine (pyrimidine or pyrazine) skeleton are preferred. Among the above, 2mDBTPDBq is the most suitable because it has high molecular transport properties and contributes to reducing the driving voltage. Dibenzoquinoxadiazoles such as -II, 2mDBTBPDBq-II, 2mCzBPDBq Derivatives of phenylalanine are preferred.

[0133] The above-mentioned material having high hole transporting property or material having high electron transporting property is used as a host material of the light-emitting layer, etc. It may also be used as such.

[0134] The substrate of the light-emitting panel is a highly heat-resistant substrate. The thermal expansion coefficient of the substrate is 0 ppm. / K or more and 60 ppm / K or less are preferable, and 0 ppm / K or more and 30 ppm / K or less are preferable. More preferably, it is greater than 0 ppm / K and less than 20 ppm / K. The glass transition temperature of the substrate is preferably 100° C. or higher and 400° C. or lower, more preferably 150° C. or higher and 400° C. or lower. °C or lower, and more preferably 200°C to 400°C.

[0135] The adhesive layer of the light-emitting panel uses a highly heat-resistant adhesive. The thermal expansion coefficient of the adhesive is 0 It is preferable that the concentration is greater than 0 ppm / K and less than 70 ppm / K. pm / K or less is more preferable, and more preferably greater than 0 ppm / K and 50 ppm / K or less is even more preferable. The glass transition temperature of the adhesive is preferably 80°C or higher and 300°C or lower, and more preferably 100°C or lower. The temperature is more preferably from 150°C to 300°C, and even more preferably from 150°C to 300°C.

[0136] When the light-emitting panel has a transistor, an oxide semiconductor may be used as a semiconductor material. Oxide semiconductors are preferred because they have a lower temperature dependency than amorphous silicon and polysilicon. The use of an oxide semiconductor makes it difficult for the transistor characteristics to change over a wide temperature range. This makes it possible to realize a highly reliable light-emitting panel.

[0137] <Light-emitting panel configuration example 1> FIG. 5A shows a top view of the light-emitting panel. A cross-sectional view of the cross-section taken along the dashed line X2-Y2 in FIG. 5(A) is shown in FIG. 5(D) shows a cross-sectional view taken along dashed line X3-Y3 in FIG. 5(A).

[0138] The light-emitting panel shown in FIGS. 5(A) to (D) includes a substrate 901, an insulating layer 903, and an auxiliary electrode 921 ( Auxiliary wiring), a light-emitting element 930, an insulating layer 925, an adhesive layer 927, a conductive layer 911, The electrochemical cell 990 includes an electrochemical layer 912 , a desiccant 913 , and a substrate 991 .

[0139] The light emitting element 930 is a bottom emission type organic EL element, and specifically, A lower electrode 931 that transmits visible light is provided on the lower electrode 931, and an EL layer 933 is provided on the lower electrode 931. An upper electrode 935 that reflects visible light is provided on the EL layer 933 .

[0140] In the light-emitting panel shown in FIGS. 5(A) to (D), light-emitting elements are disposed on a substrate 901 via an insulating layer 903. The auxiliary electrode 921 provided on the insulating layer 903 is connected to the lower electrode 93 The conductive layer 911 provided on the insulating layer 903 is electrically connected to the lower electrode 931. As shown in FIGS. 5A and 5C, a part of the conductive layer 911 is exposed. The conductive layer 912 provided on the insulating layer 903 serves as a terminal. As shown in FIGS. 5(A) and 5(D), a part of the conductive layer 912 is exposed. The end of the lower electrode 931 is covered with an insulating layer 925. An insulating layer 925 is provided to cover the auxiliary electrode 921 via the lower electrode 931 .

[0141] The light emitting element 930 is sealed by the substrate 901 , the substrate 991 , and the adhesive layer 927 . The sealing method of the light-emitting panel is not limited, and may be, for example, solid sealing or hollow sealing. For example, the adhesive layer 927 may be made of a glass material such as glass frit or a two-liquid mixed resin. Resin materials such as room temperature curing resin, photocuring resin, and thermosetting resin are used. The sealed space 929 is filled with an inert gas such as nitrogen or argon. PVC (polyvinyl chloride) resin, acrylic resin, polyimide resin , epoxy resin, silicone resin, PVB (polyvinyl butyral) resin, EVA (ethylene The inner space may be filled with a resin such as polyvinyl acetate resin. Also, the resin may contain a desiccant. It may be included.

[0142] A desiccant 913 is provided in contact with the substrate 991. The bottom emission type allows the device to occupy 929 mm of space without reducing the light extraction efficiency. A desiccant 913 can be disposed on the light-emitting element 930. This is preferable because it can extend the life of the device.

[0143] <Light-emitting panel configuration example 2> Figures 6(A) to (D) show examples of passive matrix type light-emitting panels. The light-emitting panel of the stripe type has multiple anodes arranged in parallel in stripes (bands) and A plurality of cathodes arranged in parallel in a strip shape are provided so as to be perpendicular to each other, and the intersections The EL layer is sandwiched between the two layers. ) anode and the selected cathode, causing the pixel to light up.

[0144] 6A is a plan view of a light-emitting panel before an EL layer is formed. On the lower electrode 931, a light emitting element having an opening corresponding to a light emitting region of the light emitting element is provided. On the insulating layer 925, a pair of electrodes are provided, each of which is a pair of electrodes intersecting the lower electrode 931. A plurality of parallel partition walls 928 having an inverse tapered shape are provided.

[0145] FIG. 6(B) is a cross-sectional view taken along the dashed line AB in FIG. 6(A), and FIG. 6(C) is a cross-sectional view taken along the dashed line AB in FIG. 6B and 6C, a cross-sectional view of the lower electrode 931 on the dashed line CD. The structure after the L layer 933 and the upper electrode 935 are formed to fabricate the light-emitting element 930 is shown. is.

[0146] In FIG. 6B and FIG. 6C, an insulating layer 903 is provided on a substrate 901, and a strip is formed on the insulating layer 903. An example is shown in which a plurality of stripe-shaped lower electrodes 931 are arranged at equal intervals.

[0147] As shown in FIG. 6C, the thickness of the insulating layer 925 and the partition wall 928 is set to be equal to that of the EL layer 933 and the upper By making the thickness of the electrode 935 larger than that of the EL layer 933, the EL layer 933 and the upper An electrode 935 is formed. The upper electrode 935 extends in a direction intersecting with the lower electrode 931. The electrodes are stripes that are parallel to each other. Each of the separated regions is electrically independent. In addition, the partition wall 928 is also covered with the material constituting the EL layer 933 and the upper electrode 935. These layers are separated from the EL layer 933 and the upper electrode 935. is.

[0148] By painting the EL layer 933 (at least the light-emitting layer) in different colors, each light-emitting element exhibits a different color. This configuration allows a light-emitting panel capable of full-color display. The light emitting element 930 is configured to emit white light, and the light emitted by the light emitting element 930 is filtered by a color filter. By extracting the light through a filter, a light-emitting panel capable of full-color display may be formed.

[0149] Figure 6(D) shows a passive matrix type light-emitting panel with an FPC (Flexible Printer Circuit). FIG. 6(D) shows a plan view of a case where multiple integrated circuits are mounted. The lower electrode 931 and the upper electrodes 935 intersect each other at right angles. In FIG. 6D, some components (such as the EL layer 933) are not shown.

[0150] The lower electrodes 931 are connected to the FPC 909a via an anisotropic conductive film (not shown). In addition, the upper electrodes 935 are electrically connected to the wiring 908 at the wiring ends. 08 is connected to FPC 909b via an anisotropic conductive film (not shown).

[0151] In FIG. 6D, an example in which the driver circuit is not provided on the substrate 901 is shown. An IC chip having a circuit may be mounted.

[0152] <Light-emitting panel configuration example 3> When manufacturing a flexible light-emitting panel, a flexible substrate (also called a flexible substrate) As a method for forming the light emitting element on the flexible substrate, for example, a method for directly forming the light emitting element on the flexible substrate is used. The first method and the second method are similar to those described above, but are different from the flexible substrate in that the substrate is formed on a substrate having high heat resistance (hereinafter referred to as a "fabrication substrate"). After the optical element is formed, the light emitting element is peeled off from the fabrication substrate and the light emitting element is transferred to a flexible substrate. There is a second method, which is

[0153] For example, a thin glass substrate that is flexible may be used in the manufacturing process of a light-emitting element. When a substrate having heat resistance to the temperature at which the substrate is to be heated is used, the first method can be used to perform the process. This is preferred because of simplicity.

[0154] In addition, by applying the second method, a low water permeability insulating film formed on the fabrication substrate at high temperature can be formed. The insulating film or the like can be transferred to a flexible substrate. Therefore, the insulating film has high water permeability and low heat resistance. Even if a flexible organic resin or the like is used as the material for the flexible substrate, a flexible and highly reliable light-emitting panel can be obtained. You can create a nerd.

[0155] An example of a light-emitting panel that can be manufactured by the second method is shown in FIG. 7(A). The panel is a top-emission type light-emitting panel that uses a color filter method. For example, a pixel is composed of three sub-pixels, R (red), G (green), and B (blue), which represent one color. A configuration in which one color is expressed using four sub-pixels of R, G, B, and W (white), and a configuration in which one color is expressed using four sub-pixels of R, G, B, and Y ( A configuration in which one color is expressed by four sub-pixels of four colors (yellow, red, green, and blue) can be applied. Instead, colors other than RGBWY may be used, for example, cyan, magenta, etc. stomach.

[0156] The light-emitting panel shown in FIG. 7A includes a substrate 901, an adhesive layer 902, an insulating layer 903, a transistor, and a 920, insulating layer 907, insulating layer 909, conductive layer 941, insulating layer 943, insulating layer 945, Light emitting element 930, insulating layer 925, spacer 926, adhesive layer 927, colored layer 845R, 84 5G, 845B, 845Y, the light-shielding layer 847, the insulating layer 993, the adhesive layer 992, and the substrate 99 The substrate 901 and the substrate 991 are flexible substrates, and the light-emitting panel shown in FIG. The cable has flexibility.

[0157] The light emitting element 930 includes a lower electrode 931, an optical adjustment layer 932, an EL layer 933, and an upper electrode 934. The optical adjustment layer 932 is preferably made of a conductive material having light transmitting properties. Combination of color filter (colored layer) and microcavity structure (optical adjustment layer) As a result, light with high color purity can be extracted from the light-emitting panel of one embodiment of the present invention. The thickness of the optical adjustment layer is changed according to the emission color of each pixel.

[0158] The substrate 901 and the insulating layer 903 are bonded together with an adhesive layer 902. 93 is attached by an adhesive layer 992. A transistor 920 and a light emitting device are provided on the insulating layer 903. An optical element 930 is formed on at least one of the insulating layer 903 and the insulating layer 993. If a highly moisture-proof film is used, impurities such as water may enter the light-emitting element 930 or the transistor 920. This is preferable because it can suppress the occurrence of the problem of the light emitting element becoming unstable and the reliability of the light emitting panel can be improved.

[0159] The source or drain of the transistor 920 is connected to the light-emitting element 930 through a conductive layer 941. The transistor 920 is electrically connected to the lower electrode 931. The second gate is formed on the flat surface. The end of the lower electrode 931 is covered with an insulating layer 925. The bottom electrode 931 is preferably reflective to visible light. The top electrode 935 is preferably reflective to visible light. By providing a spacer 926, the distance between the substrate 901 and the substrate 991 can be adjusted. It is possible.

[0160] Each colored layer has a portion overlapping the light emitting element 930. The light shielding layer 847 overlaps the insulating layer 925. The gap between the light emitting element 930 and each of the colored layers is filled with an adhesive layer 927.

[0161] The insulating layers 907 and 909 have the effect of suppressing the diffusion of impurities into the semiconductor that constitutes the transistor. In addition, the insulating layers 943 and 945 reduce surface irregularities caused by transistors and wiring. It is preferable to select an insulating layer having a planarizing function for this purpose.

[0162] In one embodiment of the present invention, the light-emitting panel may have a touch sensor. For example, FIG. As shown in FIG. 1B, the insulating layer 993 and the light-shielding layer 847 are interposed between the insulating layer 993 and the colored layer. A capacitor may be provided between the insulating layer 993 and the conductive layer 981. The conductive layers 981 are electrically connected to each other by the conductive layer 983 through the openings in the insulating layer 982. An insulating layer 984 is provided to reduce surface irregularities caused by the capacitance element. A colored layer and a light-shielding layer 847 are provided in contact with the insulating layer 984. The light emitting element 930 is formed using a material that transmits the light emitted by the light emitting element 930 .

[0163] As shown in FIG. 7C, the EL layer 933 may be colored differently. An EL layer 933 that emits light of a different color may be provided.

[0164] <Examples of materials> Materials that can be used for the light-emitting panel are exemplified below. The explanation of the elements may be omitted.

[0165] The substrate can be made of a material such as glass, quartz, organic resin, metal, or alloy. The substrate on the side from which light from the element is extracted is made of a material that transmits the light.

[0166] In particular, it is preferable to use a flexible substrate. For example, a substrate made of organic resin or a substrate having a thickness sufficient to provide flexibility is used. Glasses, metals, and alloys of various thicknesses can be used.

[0167] Since organic resin has a smaller specific gravity than glass, using organic resin as a flexible substrate This is preferable because it allows the light-emitting panel to be lighter than when glass is used.

[0168] It is preferable to use a highly tough material for the substrate. This makes it possible to improve impact resistance and prevent breakage. For example, organic resin substrates, thin metal substrates, or By using an alloy substrate, it is lighter and less likely to break than a glass substrate. This makes it possible to realize a light-emitting panel with high brightness.

[0169] Metallic and alloy materials have high thermal conductivity and can easily conduct heat across the entire substrate, making it ideal for the light-emitting panel. It is preferable to use a substrate made of a metal material or an alloy material because it is possible to suppress a local temperature rise in the substrate. The thickness of the plate is preferably 10 μm or more and 200 μm or less, and more preferably 20 μm or more and 50 μm or less. It is more preferable that

[0170] Examples of glass include non-alkali glass, barium borosilicate glass, and aluminoboron glass. Silicate glass or the like can be used.

[0171] Examples of materials having flexibility and transparency to visible light include flexible materials. Thick glass, polyethylene terephthalate (PET), polyethylene naphthalate ( PEN) and other polyester resins, polyacrylonitrile resins, polyimide resins, polymethyl methacrylate resin, polycarbonate (PC) resin, polyethersulfone (PES ) resin, polyamide resin, cycloolefin resin, polystyrene resin, polyamide-imide Resin, polyvinyl chloride resin, aramid resin, etc. In particular, materials with a low thermal expansion coefficient For example, polyamide-imide resin, polyimide resin, PET, etc. are preferably used. In addition, a substrate in which glass fiber is impregnated with an organic resin or an inorganic filler can be used. It is also possible to use a substrate in which the thermal expansion coefficient is reduced by mixing the material with organic resin. Since the substrate using the above is light in weight, the light-emitting panel using the substrate can also be made light in weight. .

[0172] The material constituting the metal substrate is not particularly limited, but examples thereof include aluminum, copper, and nickel. It is preferable to use metal alloys such as aluminum alloys and stainless steel. can be done.

[0173] In addition, the surface of a conductive substrate may be oxidized or an insulating film may be formed on the surface to perform insulation treatment. For example, a coating method such as spin coating or dipping may be used. The insulating film may be formed by electrochemical deposition, vapor deposition, sputtering, or the like. In addition to leaving it in the atmosphere or heating it, an oxide film is formed on the surface of the substrate by anodizing or other methods. You may do so.

[0174] As for the flexible substrate, the layer using the above-mentioned material is a lid that protects the surface of the light-emitting panel from scratches. Hard coat layers (e.g., silicon nitride layers, etc.) and layers of materials that can disperse pressure (e.g., The light-emitting element may be laminated with a layer of a material such as an aramid resin layer. In order to prevent deterioration of the life of silicon, the use of silicon nitride films, silicon oxynitride films, and other films containing nitrogen and silicon Insulating films with low water permeability, such as films containing nitrogen and aluminum, and films containing nitrogen and aluminum, such as aluminum nitride films. In this specification and the like, silicon oxynitride refers to a combination thereof. The composition of silicon oxide is that which contains more oxygen than nitrogen. The nitrogen content is more than the oxygen content. The content was measured by Rutherford Backscattering (RBS) method. Scattering Spectrometry (HSS) or Hydrogen Forward Scattering Spectrometry (HFS) Using forward scattering spectrometry (FDS) This shall be determined.

[0175] The adhesive layer may be a photo-curable adhesive such as an ultraviolet curable adhesive, a reactive curable adhesive, a heat curable adhesive, or an antibacterial adhesive. Various curing adhesives such as epoxy adhesives can be used. Resin, acrylic resin, silicone resin, phenol resin, polyimide resin, imide resin , PVC (polyvinyl chloride) resin, PVB (polyvinyl butyral) resin, EVA ( Ethylene vinyl acetate resins, etc. In particular, epoxy resins, etc., have low moisture permeability. The material is preferably a two-part mixed resin. Also, an adhesive sheet or the like may be used. Good too.

[0176] The resin may contain a desiccant. For example, an oxide of an alkaline earth metal (oxide Use substances that adsorb moisture by chemical adsorption, such as calcium oxide or barium oxide. Alternatively, materials such as zeolite and silica gel can absorb moisture by physical adsorption. If a desiccant is included, impurities such as moisture may penetrate into the light emitting element. This is preferable because it can suppress the intrusion of foreign matter and improve the reliability of the light-emitting panel.

[0177] In addition, by mixing a filler having a high refractive index or a light scattering material into the resin, it is possible to improve the light transmission efficiency. For example, titanium oxide, barium oxide, and zeolite can be used. For example, olyte, zirconium, etc. can be used.

[0178] The resin may also contain a leveling agent or a surfactant.

[0179] By adding a leveling agent or surfactant to the resin, the surface tension of the resin is lowered, and the resin The higher the wettability, the more uniform the resin can be applied. This makes it possible to prevent air bubbles from being mixed in when the pair of substrates are bonded together. It is also possible to suppress defective light emission in the light-emitting panel.

[0180] The leveling agent or surfactant should not adversely affect the elements contained in the layer to be peeled off. For example, epoxy resin with 0.2 wt% fluorine-based leveling agent added is used. The material may also be used as an adhesive.

[0181] The insulating layer 903 and the insulating layer 993 can each be formed using an insulating film having high moisture resistance. Alternatively, the insulating layer 903 and the insulating layer 993 may each be configured to prevent impurities from entering the light emitting element. It is preferable that the material has a function of preventing diffusion.

[0182] Highly moisture-proof insulating films include those containing nitrogen and silicon, such as silicon nitride film and silicon oxide nitride film. Examples of the film include a film containing nitrogen and aluminum, such as an aluminum nitride film. Alternatively, a silicon nitride film, a silicon oxynitride film, an aluminum oxide film, or the like may be used.

[0183] For example, the water vapor permeability of a highly moisture-resistant insulating film is 1×10 -5 [g / (m 2 ·day)] Less than or equal to 1×10 -6 [g / (m 2 ·day)] or less, preferably 1×10 -7 [g / (m 2 ·day)] or less, and more preferably 1×10 -8 [g / (m 2 ·da y)] or less.

[0184] The structure of the transistors in the light-emitting panel is not particularly limited. For example, The transistor may be a top gate type or an inverted staggered type. The transistor may have either a bottom gate type or a bottom gate type structure. The conductive material is not particularly limited, and examples thereof include silicon, germanium, and organic semiconductors. Or, indium, gallium, and zinc, such as In-Ga-Zn metal oxides. An oxide semiconductor including at least one of these may be used.

[0185] The crystallinity of the semiconductor material used in the transistor is not particularly limited. A semiconductor having crystallinity (a microcrystalline semiconductor, a polycrystalline semiconductor, a single crystal semiconductor, or a semiconductor having a partially crystalline region If a semiconductor having crystallinity is used, the transistor This is preferable because it can suppress deterioration of the star characteristics.

[0186] In order to stabilize the characteristics of the transistor, it is preferable to provide an undercoat film. Inorganic films such as silicon oxide film, silicon nitride film, silicon oxynitride film, and silicon nitride oxide film The insulating film can be formed in a single layer or a multilayer structure. CVD (Chemical Vapor Deposition) method (Plasma CVD method , thermal CVD method, MOCVD (Metal Organic CVD) method, etc.), ALD ( Formed using Atomic Layer Deposition (ALD), coating, printing, etc. It should be noted that the undercoat film does not have to be provided if it is not necessary.

[0187] A conductive film that transmits visible light and can be used as an electrode of a light-emitting element includes, for example, an oxide film. Indium, Indium Tin Oxide (ITO), In Examples include gallium zinc oxide, zinc oxide (ZnO), and gallium-doped ZnO. Gold, silver, platinum, magnesium, nickel, tungsten, chromium, molybdenum, iron, edge Metallic materials such as zinc, copper, palladium, or titanium, alloys containing these metallic materials, or Nitrides of these metal materials (for example, titanium nitride) can also be formed thin enough to have light transmission properties. Also, a laminated film of the above materials can be used as a conductive layer. For example, a laminated film of an alloy of silver and magnesium and ITO can be used to increase electrical conductivity. In addition, graphene or the like may be used.

[0188] A conductive film that reflects visible light and can be used as an electrode of a light-emitting element includes, for example, an aluminum film. Minium, gold, platinum, silver, nickel, tungsten, chromium, molybdenum, iron, cobalt Metallic materials such as copper, palladium, etc., or alloys containing these metallic materials. In addition, lanthanum, neodymium, germanium, etc. are added to the above metal materials and alloys. Also, alloys of aluminum and titanium, alloys of aluminum and nickel, Alloys containing aluminum (aluminum alloys), such as alloys of aluminum and neodymium, and alloys of silver and copper Formed using alloys containing silver, such as gold, silver-palladium-copper alloys, and silver-magnesium alloys An alloy containing silver and copper is preferable because of its high heat resistance. By laminating a metal film or a metal oxide film in contact with the aluminum alloy film, the oxidation of the aluminum alloy film can be prevented. The metal film and metal oxide film can be made of titanium, titanium oxide, or the like. In addition, the conductive film that transmits visible light and a film made of a metal material are laminated. For example, a laminated film of silver and ITO, a laminated film of an alloy of silver and magnesium and ITO, etc. etc. can be used.

[0189] The electrodes can be formed by vapor deposition or sputtering. , a discharge method such as an inkjet method, a printing method such as a screen printing method, or a plating method. It can be formed by:

[0190] The EL layer 933 may have a plurality of light-emitting layers. The layers may be stacked in contact with each other or with a separating layer interposed therebetween. For example, a separation layer may be provided between the fluorescent light-emitting layer and the phosphorescent light-emitting layer.

[0191] The separation layer is, for example, a layer for converting the excited state of the phosphorescent material generated in the phosphorescent-emitting layer into the fluorescent material in the fluorescent-emitting layer. To prevent energy transfer (especially triplet energy transfer) to materials via the Dexter mechanism The separation layer may be provided with a thickness of about several nm. m or more and less than 20 nm, or 1 nm or more and less than 10 nm, or 1 nm or more and less than 5 nm The separating layer may be made of a single material (preferably a bipolar material) or a plurality of materials (preferably a Preferably, the material includes a hole transporting material and an electron transporting material.

[0192] The separation layer may be formed using a material contained in the light-emitting layer that is in contact with the separation layer. This facilitates the fabrication of the light-emitting device and reduces the driving voltage. When the separation layer is made of a host material, an assist material, and a phosphorescent material (guest material), In other words, the separation layer may be formed of a phosphorescent material and an assist material. The phosphorescent layer has a region that does not contain a phosphorescent material, and the phosphorescent layer has a region that contains a phosphorescent material. It is possible to deposit the separation layer and the phosphorescent light-emitting layer with or without the phosphorescent material. By forming the separation layer and the phosphorescent layer in the same chamber, it becomes possible to form the separation layer and the phosphorescent layer in the same chamber. This makes it possible to reduce manufacturing costs.

[0193] The light emitting element 930 may be a single element having one EL layer, or a charge generating It may also be a tandem element having a plurality of EL layers stacked with an intervening layer.

[0194] It is preferable that the light emitting element is provided between a pair of highly moisture-proof insulating films. This makes it possible to prevent impurities such as water from entering the light emitting element, and thus prevents a decrease in the reliability of the light emitting panel. Specifically, as described above, the insulating layer 903 and the insulating layer 993 can be formed of a moisture-proof When a high-insulation film is used, the light-emitting element is placed between a pair of highly moisture-proof insulation films, and the light-emitting panel This can suppress the deterioration of reliability.

[0195] The insulating layer 907 and the insulating layer 909 may be, for example, a silicon oxide film, a silicon oxynitride film, An inorganic insulating film such as an aluminum oxide film can be used. The layer 945 may be made of, for example, polyimide, acrylic, polyamide, polyimide amide, or venetium. Organic materials such as benzocyclobutene resins can be used. In addition, by stacking multiple insulating films, Each insulating layer may be formed.

[0196] The insulating layer 925 is formed using an organic insulating material or an inorganic insulating material. For example, polyimide resin, polyamide resin, acrylic resin, siloxane resin, epoxy Resin, phenolic resin, etc. can be used. In particular, photosensitive resin material is used to insulate the It is preferable that the layer 925 is formed to have a curvature-formed inclined surface. A material that can be used for the insulating layer 925 can be used for 28 .

[0197] The method for forming the insulating layer 925 and the partition wall 298 is not particularly limited, and may be a photolithography method, a spa deposition method, droplet ejection method (inkjet method, etc.), printing method (screen printing, offset printing, etc.) Printing, etc. can be used.

[0198] The spacer 926 can be formed using an inorganic insulating material, an organic insulating material, a metal material, or the like. For example, inorganic insulating materials and organic insulating materials can be used for the insulating layer. Various materials can be used. Metal materials include titanium and aluminum. The spacer 926 containing a conductive material and the upper electrode 935 are electrically connected to each other. This makes it possible to suppress a potential drop caused by the resistance of the upper electrode 935. The groove 6 may be either forward tapered or reverse tapered.

[0199] Used in light-emitting panels that function as electrodes or wiring of transistors or auxiliary electrodes of light-emitting elements The conductive layer may be made of, for example, molybdenum, titanium, chromium, tantalum, tungsten, or aluminum. The material is made of metals such as tungsten, copper, neodymium, and scandium, or alloys containing these elements. The conductive layer may be formed as a single layer or a laminate. The conductive metal oxide may be indium oxide (In2O3, etc.). , tin oxide (SnO2, etc.), ZnO, ITO, indium zinc oxide (In2O3-Zn O, etc.) or these metal oxide materials containing silicon oxide can be used. .

[0200] The colored layer is a colored layer that transmits light in a specific wavelength band. For example, A red (R) color filter transmits light in the green wavelength range, and a green (G) color filter transmits light in the green wavelength range. Filter, blue (B) color filter that transmits light in the blue wavelength band, yellow wavelength band A yellow (Y) color filter that transmits light of 100 nm can be used. Using various materials, printing, inkjet, and photolithography The white sub-pixel is formed at a desired position by a bonding method or the like. A transparent resin may be placed therebetween.

[0201] The light-shielding layer is provided between adjacent colored layers. The light-shielding layer blocks light from the adjacent light-emitting element. The colored layer is provided with a light shielding layer to prevent color mixing between adjacent light emitting elements. By providing the light-shielding layer so that it overlaps the light-shielding layer, it is possible to suppress light leakage. A material that blocks light emitted from the optical element can be used. For example, a metal material, a pigment, or a dye can be used. The black matrix can be formed by using a resin material containing a light-shielding material. If the light emitting element is provided in an area other than the light emitting element, such as the driving circuit, unintended light leakage due to guided light, etc. may occur. This is preferable because it can be suppressed.

[0202] In addition, an overcoat may be provided to cover the colored layer and the light-shielding layer. This makes it possible to prevent impurities contained in the colored layer from diffusing into the light emitting element. The bar coat is made of a material that transmits light emitted from the light emitting element, such as a silicon nitride film. Inorganic insulating films such as silicon oxide films, and organic insulating films such as acrylic films and polyimide films are used. Alternatively, the insulating film may have a laminated structure of an organic insulating film and an inorganic insulating film.

[0203] One embodiment of the present invention can be applied not only to a light-emitting device but also to a display device. The display element of the display device of the embodiment is not limited to a light-emitting element such as an EL element, and may be, for example, a liquid crystal Using elements, electrophoretic elements, and MEMS (microelectromechanical systems) Display elements using carbon nanotubes, electrowetting elements, etc. Some examples include:

[0204] This embodiment mode can be combined with other embodiment modes as appropriate.

[0205] (Embodiment 3) In this embodiment, a secondary battery that can be used in a light-emitting device of one embodiment of the present invention will be described. 8 and 9. In this embodiment, a laminated secondary battery having flexibility is used. A net type secondary battery will now be described.

[0206] FIG. 8(A) shows the top surface of a laminated secondary battery. Also, the dashed line M1 in FIG. A schematic diagram of the cross section between -N1 is shown in FIG. 8(B).

[0207] The secondary battery shown in FIGS. 8(A) and 8(B) includes a positive electrode 203, a negative electrode 206, a separator 207, and a The positive electrode 203 includes a positive electrode current collector. The negative electrode 206 includes a negative electrode current collector 204 and a negative electrode active material layer 202. The porous layer 205 is made of a fibrous material.

[0208] The film 208 and the film 209 are exterior bodies. A battery pack is made of a battery having a positive electrode 203 in the shape of a tube, a separator 207, and a negative electrode 206 in the shape of a sheet, which are stacked and housed in the battery pack. The area surrounded by the exterior body is filled with electrolyte 210.

[0209] FIG. 8B shows an example in which the electrode has two layers (positive electrode 203 and negative electrode 206). By increasing the number of electrodes to two or more layers, the area (size) of the secondary battery can be increased while maintaining the capacity of the secondary battery. However, if the number of electrodes exceeds 40, the thickness of the secondary battery Therefore, if you want to give flexibility to the secondary battery, The number of electrodes is 40 layers or less, preferably 20 layers or less. A positive electrode active material layer 202 is applied to the negative electrode current collector 204, or a negative electrode active material layer 205 is applied to both sides of the negative electrode current collector 204. When applying double-sided coating, it is possible to apply 10 or more layers of electrodes while maintaining the capacity of the secondary battery. It can also be reduced downwards.

[0210] The sheet-shaped positive electrode 203, the separator 207, and the sheet-shaped negative electrode 206 are laminated by heating. The sealing can be performed by sealing.

[0211] In this specification, heat sealing refers to sealing by heating and pressing the base film. The adhesive layer that is partly coated on the laminate film, or the outermost or innermost layer with a low melting point This refers to melting the material with heat and bonding it under pressure.

[0212] Secondary batteries are made of a thin, flexible film (such as a laminate film) as an exterior body. A laminate film is a laminated film made of a base film and an adhesive synthetic resin film. The base film is a laminated film of two or more types. Polyesters such as polypropylene (PBT), nylon 6, nylon 66, etc. The adhesive layer may be made of a synthetic resin film, an inorganic vapor deposition film, or paper. The films are made of polyolefins such as polyethylene (PE) and polypropylene (PP), Acrylic synthetic resin, epoxy synthetic resin, etc. can be used. Laminate film The laminate is laminated to the object to be treated by thermocompression bonding using a laminating device. It is preferable to apply an anchor coating agent as a pretreatment before carrying out the process. The adhesive between the film and the object to be treated can be strengthened. Cyanate-based materials can be used.

[0213] The positive electrode current collector 201 and the negative electrode current collector 204 also serve as terminals for obtaining electrical contact with the outside. Therefore, as shown in FIG. 8(A), the positive electrode current collector 201 and the negative electrode current collector 204 A part of the electrode is disposed so as to be exposed to the outside from the film 208 and the film 209. When the number of layers is increased and stacked, multiple positive electrode current collectors 201 are electrically connected by ultrasonic welding. and the negative electrode current collectors 204 are electrically connected by ultrasonic welding. In FIG. 8(B), a part of the negative electrode current collector 204 protrudes outward from the film 209 and extends outward. is.

[0214] FIG. 8A shows an example of sealing using a film 208 and a film 209. It is not limited to this, and a single film may be folded in the center and used as an exterior body. An example different from B) is shown in Fig. 9. The film 218 is folded in the center to overlap the two ends. The structure is sealed with an adhesive layer on three sides. The manufacturing method is explained below with reference to Figure 9.

[0215] First, the film 218 is folded in the center to the state shown in FIG. 9(A). Then, as shown in FIG. As shown, the secondary battery is made up of a positive electrode collector 211, a separator 217, and a negative electrode collector 214. Then, a lead electrode 2 having a sealing layer 225 shown in FIG. The lead electrodes 226 are also called lead terminals and are connected to the positive and negative electrodes of the secondary battery. The positive electrode is connected to the positive terminal of the lead electrode. The protruding portion of the positive electrode current collector 211 is electrically connected by ultrasonic welding or the like. The lead electrode that connects to the protrusion of the conductor is made of aluminum. The lead electrode and the protruding portion of the negative electrode current collector 214 are electrically connected by ultrasonic welding or the like. The lead electrode connected to the protruding portion of the negative electrode current collector 214 is made of a material plated with nickel. Copper is used. In order to leave one side for the electrolyte, two sides of the film 218 are During the thermocompression bonding, the sealing layer 225 provided on the lead electrode is also melted. The lead electrode and the film 218 are fixed together by the above-mentioned method. A desired amount of electrolyte is dropped onto the inside of the bag-shaped film 218 in a sterilized atmosphere. Finally, the peripheral edge of the film that was left unbonded is sealed by bonding with heat. In this manner, the secondary battery 20 shown in FIG. 9(D) can be fabricated. The area of ​​the end face is the thermocompression bonding area 227 .

[0216] An example of a cross-sectional view taken along the dashed line M2-N2 in FIG. 9(D) is shown in FIG. 9(E). As shown, a positive electrode current collector 211, a positive electrode active material layer 212, a separator 217, a negative electrode active material layer 215, and the negative electrode current collector 214 are laminated in this order and sandwiched between folded films 218. The end portion is sealed with an adhesive layer 231, and the remaining space is filled with an electrolyte 232. It has.

[0217] Here, the flow of current during charging of the secondary battery will be explained with reference to FIG. When a secondary battery is considered as a closed circuit, the movement of lithium ions and the flow of electric current are in the same direction. In secondary batteries that use lithium, the anode and cathode are charged and discharged. (cathode) is switched, and the oxidation and reduction reactions are switched, so the reaction potential The electrode with the higher reaction potential is called the positive electrode, and the electrode with the lower reaction potential is called the negative electrode. In this case, even if the battery is charging, discharging, or applying a reverse pulse current, Even when an electric current flows through it, the positive electrode is called the "positive electrode" or "+ electrode (plus electrode)" and the negative electrode is called the " The negative electrode is called the negative electrode or the negative (-) electrode. When the terms node (anode) and cathode (negative electrode) are used, the reverse occurs during charging and discharging. This can lead to confusion. Therefore, the anode and cathode are The term "electrode" is not used in this specification. When using the term cathode, specify whether it is charging or discharging, and It will also be indicated whether it corresponds to a positive (positive) or negative (negative) pole.

[0218] For example, when a charger is connected to the two terminals shown in FIG. 9(F), the secondary battery 20 is charged. As the charging of the secondary battery 20 progresses, the potential difference between the electrodes increases. The current flows from the external terminal of the secondary battery 20 to the positive electrode collector 211, and then flows into the positive electrode collector 211. The current flows from the negative electrode current collector 211 to the negative electrode current collector 214, and from the negative electrode current collector 214 to the secondary battery 20. The direction of the current flowing towards the external terminal is considered to be positive. In other words, the direction of the charging current is The direction of the current is .

[0219] This embodiment mode can be combined with other embodiment modes as appropriate.

[0220] (Embodiment 4) In this embodiment, a light-emitting panel according to one embodiment of the present invention will be described with reference to FIGS. do.

[0221] The light-emitting panel of the present embodiment includes a capacitive element, a light-emitting element, and a switch (such as a switch element). In the light-emitting panel of this embodiment, a capacitance is Since the voltage between the electrodes of the element is maintained, data can be retained even if the power supply is stopped. Therefore, by using the light-emitting device according to one embodiment of the present invention, power consumption can be reduced. It is also possible to realize a light emitting device that can be used for a long period of time on a single charge.

[0222] Specifically, the light-emitting panel of the present embodiment includes a first switch, a second switch, and a capacitor. The first switch is electrically connected to one electrode of the capacitor. The second switch is electrically connected to the other electrode of the capacitance element. The light emitting element has a function of holding a voltage according to a video signal. During a period in which the capacitance element holds the voltage, the first switch and the second switch The switch is in a non-conducting state and is electrically isolated from the driver circuitry used to supply the video signal. do.

[0223] Alternatively, the light-emitting panel of this embodiment includes a first transistor, a second transistor, The gate of the first transistor is connected to a third transistor, a capacitor, and a light-emitting element. The first transistor is electrically connected to a first wiring. One side is electrically connected to the second wiring, and the other side is connected to one electrode of the capacitor element and the third transistor. The source or drain of the second transistor is electrically connected to the gate of the first transistor. One side is electrically connected to the third wiring, and the other side is connected to the other electrode of the capacitor element and the third transistor. The source or drain of the third transistor is electrically connected to the source or drain of the third transistor. The other of the source and the drain is electrically connected to a fourth wiring. The light-emitting element has a function of emitting light in response to the voltage. During a period in which the capacitor element holds a potential, the first transistor and the second transistor is in a non-conducting state, even though it is electrically isolated from the driver circuit used to supply the video signal. Alternatively, during a period in which the capacitor element holds a potential, the potential of the second wiring is set to the potential of the first wiring. an operation of setting the potential of the fourth wiring to the potential of the third wiring; and an operation of setting the potential of the first wiring to the potential of the third wiring. An operation of stopping the supply of potential to the second wiring, the third wiring, and the fourth wiring may be performed.

[0224] As the switch, a transistor including an oxide semiconductor is preferably used. Since semiconductors have a wider band gap than silicon, etc., the off-state current value of a transistor In addition, a transistor including an oxide semiconductor can be formed by using an amorphous Compared to transistors with fast silicon or polysilicon, the temperature dependency is low. Therefore, the light-emitting panel can be used in a wide temperature range. The first transistor and the second transistor each preferably include an oxide semiconductor.

[0225] FIG. 10A shows an example of a circuit (also referred to as a pixel or a pixel circuit) included in a light-emitting panel.

[0226] The circuit 140 in FIG. 10A includes a light-emitting element 101, a capacitor 102, and a first transistor. The light emitting device includes a first transistor 103, a second transistor 104, and a third transistor 105. The panel has one or more circuits 140. As shown in FIG. 10B, the light-emitting panel The circuit 140 may have circuits 150 arranged in a matrix.

[0227] The gate of the first transistor 103 is electrically connected to a wiring GL (also referred to as a gate line). Either the source or the drain is electrically connected to a wiring SL (also called a source line). The other of the source and the drain is connected to one electrode of the capacitor 102 and a third transistor. The gate of the transistor 105 is electrically connected to the gate of the transistor 106 .

[0228] The gate of the second transistor 104 is electrically connected to the wiring GL. One of the drains is connected to the other electrode of the capacitor 102, one electrode of the light-emitting element 101, and the first The third transistor 105 is electrically connected to the source or drain of the third transistor 105. The other of the source and the drain is electrically connected to a wiring V0.

[0229] The other of the source and the drain of the third transistor 105 is electrically connected to the wiring ANODE. This is being continued.

[0230] The other electrode of the light emitting element 101 is electrically connected to a wiring CATHODE.

[0231] In the circuit 150 in FIG. 10B, a wiring ANODE, a wiring CATHODE, and a wiring Although V0 is not shown, it is arranged in each circuit 140 in the same manner as in FIG. These wirings may be shared by a plurality of circuits 140. For example, the wiring V0 is The wiring CAT may be shared by two circuits 140 adjacent in the GL direction. The HODE may be shared by two circuits 140 adjacent to each other in the wiring SL direction.

[0232] The wiring GL is connected to a first transistor 103. (also referred to as an off or non-conducting state) and It has the function of supplying (also called input or transmission) a potential that controls conduction or non-conduction.

[0233] The wiring SL is connected in response to a video signal (also called a data signal, a video signal, or an image signal). The potential is supplied to the power supply.

[0234] The wiring V0 has a function of supplying a power supply potential to the other electrode of the capacitor 102. The ODE applies a power supply voltage to one electrode of the light emitting element 101 (the anode electrode in the example of FIG. 10(A)). The wiring CATHODE has a function of supplying a potential to the other electrode of the light emitting element 101 (FIG. 1 In the example of 0(A), it has the function of supplying a power supply potential to the cathode electrode.

[0235] The light emitting element 101 is, for example, an EL element or other light emitting element, and has an anode electrode and a cathode electrode. When a current flows through the electrodes, it has the function of displaying (emitting light) a value according to the current value.

[0236] The first transistor 103 transfers the potential of the wiring SL (also referred to as Vin) to the The second transistor 104 has a function of supplying power to one electrode and the gate of the third transistor 105 .

[0237] The second transistor 104 supplies the potential of the wiring V0 (also referred to as V0) to the capacitor 102 and It has the function of supplying current to one electrode.

[0238] The capacitance element 102 generates a voltage (also called Vin-V0) according to the potential difference between the wiring SL and the wiring V0. ) that is, it has the function of holding the voltage according to the video signal. The capacitor 102 is connected between the gate and the source or drain of the third transistor 105. The function of this circuit is to hold a voltage corresponding to the potential difference between the two video signals. The voltage according to the difference between the potential Vin of the wiring SL and the potential V0 of the wiring V0 (V in-V0).

[0239] The third transistor 105 outputs a voltage to the light-emitting element 10 in response to the voltage held in the capacitor 102. It has the function of controlling the current flowing through 1.

[0240] Therefore, the light emitting element 101 has a function of displaying light in accordance with the voltage held in the capacitance element 102. Possesses the ability.

[0241] Next, the operation of the circuit 140 in FIG. 10 will be described.

[0242] <Write operation> The video signal is written as follows. First, a first transistor is connected to the line GL. A potential is supplied so that both the first transistor 103 and the second transistor 104 are conductive. The first transistor 103 and the second transistor 104 are both turned on, and the capacitance element 102 One electrode of the capacitor 102 is electrically connected to the wiring SL, and the other electrode of the capacitor 102 is electrically connected to the wiring V0. Then, a voltage according to the potential difference between the wiring SL and the wiring V0 is input between the electrodes of the capacitor 102. That is, a voltage corresponding to the video signal is input to the capacitive element 102. In this manner, a video signal is written to the circuit 140. It can be said that the potential for initializing the circuit (also called the initialization operation) can be supplied. In the path 140, the write operation and the initialization operation can be performed simultaneously.

[0243] The initialization operation and the write operation may be performed separately. In that case, the first transistor 1 The gate of the second transistor 103 and the gate of the second transistor 104 are connected to separate wirings. Then, the second transistor 104 is turned on, and the wiring V0 and the capacitor 102 are connected to each other. The first transistor 103 is then electrically connected to the other electrode to initialize the first transistor 103. The wiring SL and one electrode of the capacitor 102 are electrically connected to each other, and a video signal is written. Just insert it.

[0244] In addition, during the write operation, the potential of the wiring V0 is set to be higher than the potential of the wiring CATHODE. Therefore, a current can be passed through the light emitting element 101 even during the writing operation. By keeping the potential of the line CATHODE or lower, a current flows through the light emitting element 101 during the writing operation. In addition, the potential of the wiring V0 and the potential of the wiring CATHODE are set equal to each other. For example, the potential of the wiring V0 can be set to 0V. This is possible, but not limited to this.

[0245] <Holding operation> The video signal is held as follows. A potential is supplied to the first transistor 103 so that the second transistor 104 is both turned off. The first transistor 103 and the second transistor 104 are both turned off, and the capacitance element One electrode of the capacitor 102 is not electrically connected to the wiring SL, and the other electrode of the capacitor 102 is connected to the wiring V0 Then, the voltage input in the writing operation is applied between the electrodes of the capacitor 102. That is, the capacitance element 102 holds a voltage corresponding to the video signal. While the voltage is held in the capacitor 102, the light emitting element 101 receives the held voltage. It is possible to display the image according to the above.

[0246] <Display operation> The display operation is performed as follows. Specifically, when the voltage is equal to or lower than the threshold voltage of the third transistor 105, a current flows. When the voltage exceeds the threshold voltage, the current flows. The light emitting element 101 electrically connected to the wiring ANODE is also The current flows in the direction perpendicular to the light emitting element 101. The light emitting element 101 can perform display in accordance with the current. Here, the voltage between the gate and source of the third transistor 105 is the capacitance element 1 Since the voltage is held in the capacitor 102, the light emitting element 101 is The display will be performed accordingly.

[0247] As described above, in the circuit 140, the first transistor is provided between the capacitor 102 and the wiring SL. 103 is disposed, and a second transistor 104 is disposed between the capacitor 102 and the wiring V0. The first transistor 103 and the second transistor 104 are arranged in a By making the capacitor 102 non-conductive, the fluctuation or loss of the voltage held in the capacitor 102 is suppressed as much as possible. As a result, the video signal written to the circuit 140 can be retained. .

[0248] In the circuit 140, the wiring GL, the wiring SL, the wiring V0, the wiring ANODE, and the wiring CATH Even if the supply of potential to the ODE is stopped, the capacitive element 102 can hold the voltage. That is, even if the power supply is stopped, the capacitor 102 can hold the voltage. Therefore, the circuit 140 and the driving circuit (driving device) used when writing the video signal are Even if the power supply to the capacitor 102 is electrically cut off, the voltage of the capacitor 102 can be held. It is also possible to remove the driving circuit, which allows for the miniaturization and cost reduction of the light emitting device. It is also possible to simply electrically disconnect the drive circuit from the circuit 140 without removing the drive circuit.

[0249] <Redisplay operation> When displaying again (also called redisplay operation), at least the wiring ANODE and wiring CAT By supplying a voltage to the HODE, the display can be made according to the video signal held. Therefore, the number of power supplies required for the redisplay operation can be reduced compared to the write operation. The power consumption can be reduced compared to the write operation. Compared with a driver circuit, it is possible to reduce the size and power consumption.

[0250] The four periods during which the above-mentioned write operation, hold operation, display operation, and redisplay operation are performed are respectively: These may also be called write periods, retention periods, display periods, and redisplay periods.

[0251] Next, an example of a means for suppressing fluctuations in the voltage held in the capacitor 102 in the circuit 140 will be described. This article explains:

[0252] First, as in the above-described circuit 140, a first electrode is provided between the capacitor 102 and the wiring SL. A first transistor 103 is provided between the other electrode of the capacitor 102 and the wiring V0. A transistor 104 is provided.

[0253] When the first transistor 103 and the second transistor 104 are not conductive, It is preferable to make the flowing current (also called the off current or leakage current) as small as possible.

[0254] As a means for reducing the off-state current, A transistor using an oxide semiconductor can be used as the transistor 104. The band gap of the oxide semiconductor is wider than that of silicon. The off-state current of the transistor can be made extremely small.

[0255] In addition to oxide semiconductors, semiconductors in Group 14 of the periodic table can also be used as materials for transistors. Using various semiconductors such as semiconductors containing silicon, organic semiconductors, and compound semiconductors In addition, an amorphous semiconductor, a microcrystalline semiconductor, a polycrystalline semiconductor, or a single crystal semiconductor can be used. etc. can be used.

[0256] As another method for reducing the off-state current, the first transistor 103 and the second transistor For example, the channel length of the first transistor 104 may be increased. In at least one of the first transistor 103 and the second transistor 104, the channel length is The width of the first transistor 103 or the second transistor At least one of the channel lengths of the transistors 104 is made longer than the channel length of the third transistor. This is also fine.

[0257] As another method for reducing the off-state current, the first transistor 103 and the second transistor For example, the channel width of the first transistor 104 may be reduced. In at least one of the first transistor 103 and the second transistor 104, the channel width is The length of the first transistor 103 or the second transistor The channel width of at least one of the transistors 104 is made smaller than the channel width of the third transistor. This is also fine.

[0258] As another method for reducing the off-state current, the first transistor 103 and the second transistor One of the transistors 104 may have a multi-gate structure. The gate may have a multi-gate structure.

[0259] The size of the transistor may be other than that described above. For example, the first transistor The channel length of at least one of the first transistor 103 and the second transistor 104 is The width of the first transistor 103 may be equal to or larger than the channel width. Alternatively, the channel length of at least one of the second transistors 104 is set to be shorter than that of the third transistor. The channel length of the first transistor 103 or the second transistor In at least one of the stadia 104, the channel width may be greater than the channel length. In addition, at least one of the channels of the first transistor 103 and the second transistor 104 The channel width of the first transistor may be made larger than the channel width of the second transistor. The switching speed of the transistor can be increased.

[0260] Another method for reducing the off-state current is to reduce the gate insulating film of a transistor. The gate insulating film contains a material with a high dielectric constant, which reduces leakage current. The leakage current can be reduced. For example, the gate insulating film is made of hafnium oxide or zinc oxide. The gate insulating film may contain ruthenium, lanthanum oxide, etc. For example, the gate insulating film is thicker than the gate electrode. It may have a region.

[0261] Note that the material of the third transistor 105 is an oxide semiconductor, an element belonging to Group 14 of the periodic table, Various semiconductors, including semiconductors containing silicon, organic semiconductors, and compound semiconductors In addition, an amorphous semiconductor, a microcrystalline semiconductor, a polycrystalline semiconductor, or a single crystal semiconductor can be used. In particular, a transistor having an oxide semiconductor can be formed using, for example, Compared to transistors with amorphous silicon, the electrical characteristics such as field effect mobility or reliability are improved. In addition, the first transistor 103 and the second transistor The use of an oxide semiconductor for both the first transistor 104 and the third transistor 105 is advantageous in that This is preferable because the above transistors can be manufactured in the same process.

[0262] Another embodiment of the circuit included in the light-emitting panel is shown in FIG. The wiring SL may be electrically connected to the protection circuit 111. The protection circuit 121 may be electrically connected to the protection circuit 121.

[0263] 11B shows an example of a protective circuit 111 electrically connected to the wiring SL. is electrically connected to a wiring 114 via a diode-connected transistor 112. The wiring SL is connected to the wiring 115 through the diode-connected transistor 113. A high power supply potential is supplied to the wiring 114, and a is supplied with a low power supply potential.

[0264] FIG. 11C illustrates an example of a protective circuit 121 electrically connected to the wiring GL. is electrically connected to a wiring 124 via a diode-connected transistor 122. The wiring GL is connected to a wiring 125 via a diode-connected transistor 123. A high power supply potential is supplied to the wiring 124, and a is supplied with a low power supply potential.

[0265] The transistors 112, 113, 122, and 123 are formed of an oxide semiconductor, an elemental periodic Semiconductors containing the Group 14 semiconductors (silicon, etc.) in the table, organic semiconductors, and compound semiconductors Various semiconductors such as conductors can be used. In addition, amorphous semiconductors, microcrystalline semiconductors, polycrystalline semiconductors, A crystalline semiconductor, a single crystal semiconductor, or the like can be used.

[0266] Another embodiment of the circuit included in the light-emitting panel is shown in FIG. 12. In the circuit of FIG. The transistor 103 and the second transistor 104 have a back gate (also called a second gate). The back gate of the first transistor 103 is connected to the wiring BGL. The back gate of the second transistor 104 is electrically connected to the wiring BGL. The wiring BGL is electrically connected to the first transistor 103 and the second transistor The first transistor 104 has a function of adjusting the threshold voltage of the first transistor 104. Even if the third and second transistors 103 and 104 are normally on, By supplying a potential from the wiring BGL, the conduction or non-conduction can be controlled. Instead, each back gate may be electrically connected to the wiring GL.

[0267] In the light-emitting panel of FIG. 12, the back gate of the first transistor 103 and the back gate of the second transistor The back gate of the transistor 104 may be electrically connected to a different wiring. The third transistor 105 may also have a back gate. The gate and back gate of the third transistor 105 are electrically connected to each other. The current supply capability of the third transistor 105 can be improved. The gate and back gate are electrically connected to separate wiring, and the threshold voltage is adjusted to the back gate. The ion exchange layer 11 may have a function for adjusting the ion exchange layer 11.

[0268] By using at least one of the above means, the off-current can be reduced. By using the above means in combination, each means acts synergistically to further reduce the off-state current. can be done.

[0269] <Stop operation> Next, during the period in which the circuit 140 holds the video signal, the driving of the circuit 140 is stopped. Here, the operation of stopping the driving is described as the operation of stopping the driving of the circuit. This refers to the operation of stopping the supply of potential to each wiring 140.

[0270] First, in the initial state of the holding period, the first transistor 103 and the second transistor 104 are In this state, both of the light emitting elements 101 and 102 are non-conductive, and the light emitting element 101 is performing display. The hold operation may be considered as part of the stop operation. In that case, as operation (0), A potential at which both the first transistor 103 and the second transistor 104 are turned off Supply the same potential as the wiring CATHODE to make the wiring non-conductive. By setting the potential at the same level, the number of power supplies in the redisplay operation can be reduced. This includes not only cases where the potentials are completely the same, but also cases where the potentials are roughly the same, taking into account slight differences in the settings. It's okay to be.

[0271] Next, in operation (1), the wiring SL and the wiring V0 are set to the same potential as the wiring GL. By performing (1), the number of power supplies required for the redisplay operation can be reduced. (0) and (1) are performed simultaneously, and the wiring GL, wiring SL, and wiring V0 are simultaneously set to the same potential. However, it is preferable to perform the operation (0) and the operation (1) separately, since the voltage of the capacitance element 102 is smaller than that of the capacitance element 102. In addition, the line SL is set to the same potential as the line GL. After that, the wiring V0 may be set to the same potential as the wiring GL, or the reverse order may be used. Step (1) need not be performed.

[0272] Next, in operation (2), the wire ANODE is set to the same potential as the wire CATHODE. By performing this operation (2), the light emitting element 101 is turned off. When the supply of potential is stopped, a sudden drop in potential can be prevented, and the voltage fluctuation or It is possible to minimize the loss of voltage. In addition, by performing operations (1) and (2) simultaneously, However, it is preferable to perform the steps separately in order to suppress the voltage fluctuation or loss of the capacitor 102 as much as possible. The function is improved. In addition, the order of action (1) and action (2) may be reversed, but action (1) The latter operation (2) has the function of suppressing the voltage fluctuation or loss of the capacitance element 102 as much as possible. In addition, if a sudden drop in potential is not a problem, you can perform operation (2). It is not necessary.

[0273] Finally, as an operation (3), the supply of potential to each wiring of the circuit 140 is stopped. Specifically, the circuit 140 and the drive circuit used to write the video signal are stopped. The voltage of the capacitance element 102 can be maintained even if the drive circuit is cut off. Therefore, it is possible to remove the drive circuit and use only the light-emitting panel having the circuit 140. By removing the drive circuit and separating it from the light-emitting panel, the light-emitting panel can be made smaller. It is possible to reduce the size, weight, and durability of the structure.

[0274] In addition, if the circuit configuration is like the circuit 140 described above, the voltage of the capacitance element 102 can be held. Therefore, the driving of the circuit 140 may be stopped in the initial state without performing the above-mentioned stopping operation. However, by performing the stop operation, the number of power supplies in the redisplay operation can be reduced, or the hold period can be shortened. Therefore, it is possible to suppress the voltage fluctuation or loss in the circuit 14 as much as possible. It is extremely effective to perform the above-mentioned stopping operation in a circuit configuration such as .

[0275] In addition, when the held video signal is erased and written again, the above-mentioned writing operation is performed again. Just do the following.

[0276] In addition, when the circuits 140 are arranged in a matrix as shown in FIG. 10B, a plurality of images can be stored. For example, among the wirings GL1 to GLm (m is an integer of 1 or more), A first bipolar transistor is connected to a plurality of circuits 140 electrically connected to the odd-numbered rows (m=1, 3, 5, 7, etc.). Multiple circuits that hold video signals and are electrically connected to even rows (m=2, 4, 6, 8, etc.) The second video signal is held in the odd-numbered row circuit 140 during the redisplay period. By switching between the circuit 40 and the circuit 140 of the even row, multiple displays can be performed. Specifically, in the first period of the redisplay period, the circuit 140 of the odd row A potential is supplied to the wiring ANODE and the wiring CATHODE of the second period of the display period. Between the two, a potential is applied to the wiring ANODE and the wiring CATHODE of the circuit 140 in the even row. A selection circuit is provided that can supply a potential to odd-numbered rows and even-numbered rows by switching between them. Similarly, it may hold more than two images.

[0277] Here is another example of the stopping operation of the circuit 140. The following example shows a more efficient way to preserve data than the above stopping operation. You can further increase your endurance.

[0278] In the above-described stopping operation, the first transistor 103 and the second transistor 10 4 is supplied with a potential that makes them non-conductive. By setting the potential to, for example, 0V, However, the first transistor 103 and the second transistor When 104 is normally on, even if the potential of the wiring GL is set to 0V, it does not become off. There is a possibility that current may flow.

[0279] Therefore, in one aspect of the present invention, in the operation (1) of the above-mentioned stopping operation, the wiring SL or the wiring V The potential of the first transistor 103 is set to be higher. Or, even if the second transistor 104 is normally on, a current flows. As a result, loss of the video signal in the circuit 140 can be suppressed. When the wiring SL or the wiring V0 is set to the high potential, During the re-display operation, the re-display can be performed according to the held video signal.

[0280] For example, the potential of the wiring SL or the wiring V0 may be set higher than the potential of the wiring GL. By setting the wiring SL or wiring V0 to the same potential as the wiring ANODE, the number of power supplies can be reduced. However, it does not have to be at the same potential as the wiring ANODE.

[0281] Alternatively, both the wiring SL and the wiring V0 may be set to a high potential. By making V0 the same potential as SL, the number of power supplies can be reduced. For example, the potential of the first transistor 104 may be different from that of the second transistor 104. If the current flows more easily through the resistor 103, the potential of the wiring SL is set to be higher than the potential of the wiring V0. By reducing the capacitance, it is possible to make it difficult for a current to flow through the first transistor 103. The potential of the wiring SL may be set lower than the potential of the wiring V0.

[0282] As in the light-emitting panel of FIG. 11, the wiring SL is electrically connected to the protection circuit 111. In this case, the high potential to be supplied to the wiring SL is supplied from the wiring 114 or the wiring 115. By applying this configuration, the power supply to the protection circuit 111 during the shutdown operation can be reduced. The potential can also be used as the high potential supplied to the wiring SL.

[0283] Alternatively, in one embodiment of the present invention, the potential of the wiring GL is increased by more during the operation (0) of the stopping operation. By setting the potential to low, even if the first transistor 103 or the second transistor Even if the transistor 104 is normally on, current is prevented from flowing. For example, it is preferable to set the wiring GL to be lower than 0 V. As a result, The loss of the video signal from the line GL is suppressed. Thus, when the circuit 140 performs a redisplay operation, the redisplay can be performed according to the held video signal. can be done.

[0284] When the first transistor 103 or the second transistor 104 is an n-channel transistor, In this case, the wiring GL is set to a low potential as described above, and in the case of a p-channel type, the wiring GL is set to a high potential. It would be best to consider it as a rank.

[0285] In addition, as in the light-emitting panel of FIG. 11, the wiring GL is electrically connected to the protection circuit 121. In this case, the low potential supplied to the wiring GL is supplied from the wiring 124 or the wiring 125. By applying this configuration, the power supply to the protection circuit 121 during the shutdown operation can be reduced. The potential can also be used as the low potential supplied to the wiring GL.

[0286] <Modification> FIG. 13 is a diagram illustrating an example of a circuit included in a light-emitting panel. The circuits 140a and 140b have the same connection relationship as the circuit 140 in FIG. 13, the difference from FIG. 10(A) is that the light-emitting element 101 is a circuit 140a and a circuit 140b. That is, one electrode of the light emitting element 101 is connected to the circuit 140a is electrically connected to the wiring ANODEa via the third transistor 105a. At the same time, the fourth transistor 105b of the circuit 140b is connected to the wiring ANODEb via the fourth transistor 105b. are electrically connected.

[0287] The circuit 140 of FIG. 10 prevents pixel burn-in by holding the same video signal for a long period of time. Therefore, in the light-emitting panel shown in FIG. A video signal is written to the circuit 140b, and an inverted signal of the video signal is written to the circuit 140b. The light emitting element 101 is displayed by the video signal of the circuit 140a, and after a predetermined period of time, the circuit 140 b causes the light emitting element 101 to display. By switching between these, burn-in can be suppressed.

[0288] During the period when a display is performed based on a video signal, a potential is supplied to the wiring ANODEa, and an inverted signal The wiring ANODEb is connected to the line ANODEb so that a potential is supplied to the wiring ANODEb during the display period. For example, the light-emitting panel may be equipped with a wiring A selection circuit for switching the conduction between the line ANODEa and the wiring ANODEb may be provided. In addition, a switch is provided between the wiring ANODEb and the third transistor 105b. The switch may be configured to be conductive when a display is performed by a rotation signal. The switch may be provided between the light emitting element 101 and the third transistor 105b. Between the pixels adjacent to each other in the wiring GL direction, the third transistors 105b are provided. It may be possible.

[0289] Also, a signal based on a single color image such as a black image or a single gray scale image is input to the circuit 140b. This has the effect of preventing burn-in, similar to the inverted signal.

[0290] <Drive circuit> A driving circuit 501 shown in FIG. 14 has a function of driving, for example, the circuit 140 shown in FIG. .

[0291] The driver circuit 501 includes a first circuit 502 (also called a gate driver) and a second circuit 503. (also called a source driver). It may also have a CPU, a memory, etc.

[0292] The first circuit 502 has a function of supplying potentials to the wirings GL1 to GLm. For example, Any of the wirings GL1 to GLm is electrically connected to the wiring GL shown in FIG. The first circuit 502 includes a first transistor 103 and a second transistor The first circuit 502 has a function of supplying a potential to the gate of the transistor 104. 1, or the wiring BGL in FIG. This is also fine.

[0293] The second circuit 503 supplies potentials to the wirings SL1 to SLn (n is an integer of 1 or more). For example, any of the wirings SL1 to SLn may be the wiring The second circuit 503 is electrically connected to the line SL. The transistor 03 has a function of supplying a potential to one electrode of the capacitor 102 .

[0294] When m and n are 2 or more, the wirings GL1 to GLm and the wirings SL1 to SLn in FIG. correspond to the wirings GL1 to GLm and the wirings SL1 to SLn of the circuit 150 in FIG. do.

[0295] The driver circuit 501 is electrically connected to the wiring ANODE shown in FIG. The driver circuit 501 has a function of supplying a potential to the ANODE. It is electrically connected to the wiring CATHODE and has the function of supplying a potential to the wiring CATHODE. The driver circuit 501 is electrically connected to the wiring V0 in FIG. 13. The driver circuit 501 has a function of supplying a potential to the wiring ANODEa , and may have a function of supplying a potential to the wiring ANODEb.

[0296] In this manner, the driver circuit 501 supplies potential to each wiring of the circuit 140 in FIG. A function for writing a video signal, a function for holding a video signal, and a function for responding to the video signal. and a function to display the same.

[0297] Furthermore, the driving circuit 501 has a function of performing a stopping operation. By performing this operation, for example, loss of the video signal during the hold period of the circuit 140 is suppressed as much as possible. It is possible.

[0298] Moreover, regardless of the holding period of the video signal, the circuit 140 and the driving circuit 501 are electrically disconnected. By performing the stop operation when the power is turned off, a sudden voltage drop in the circuit 140 can be suppressed. This can be done.

[0299] In this embodiment, the driving circuit 501 stops the circuit 140. However, the driving circuit 501 can be applied to other circuits. Even a circuit having a holding function such as the above can be driven. For example, the driving circuit 5 By performing the above stopping operation before electrically disconnecting 01 from the circuit that does not have a holding function, A sudden voltage drop can be suppressed.

[0300] FIG. 14B illustrates an example of the first circuit 502. The first circuit 502 includes a shift register The shift register includes a signal RE, signals PW1 to PWm, and a signal Signals CK1 to CK4 and signal SP are input. Signal RE is a reset signal, signal PW1 PW1 to PW4 are pulse width control signals, CK1 to CK4 are clock signals, and SP is a start Each signal is a pulse signal. The first circuit 502 controls signals output to the wirings GL1 to GLm. It is not limited to circuits.

[0301] FIG. 14C illustrates an example of the second circuit 503. The second circuit 503 includes a selection circuit SSD The selection circuit SSD is supplied with signals R, G, B, and SMP. Signal R is the video signal used to display red gradations, and signal G is the video signal used to display green gradations. signal B is a video signal used for blue gradation display, and signal SMP is a sampling signal. The voltage value of each video signal is controlled according to the number of gradations to be displayed. The selection circuit SSD This is a circuit that uses a common video signal for multiple wirings and drives them by time division. For example, the wiring SL is divided into three wirings, and the selection circuit SSD supplies a signal R to the wiring SL1 and a signal S Signal G is supplied to line L2, signal B is supplied to line SL3, and so on. The signal R is supplied to the wiring SL4, and the video signal is output to the wiring SL in a time division manner. The signals are supplied from the shift registers SR1 to SRm to the wirings SL1 to SLm. The signal output to the second circuit 503 is controlled by the second circuit 504. do not have.

[0302] <Redisplay circuit> The redisplay operation is performed, for example, by electrically disconnecting the circuit 140 in FIG. 10 and the drive circuit 501 in FIG. After that, the light emitting element 101 is operated to display again. FIG. 15 shows a circuit ( This is an example of a display circuit (also called a power supply circuit).

[0303] The display circuit 601 in FIG. 15(A) is an example of a circuit having two power sources. In the path 140, a potential can be applied to the wiring ANODE and the wiring CATHODE. do.

[0304] FIG. 15B is an example of a display circuit 601. The display circuit 601 includes a power supply 602 and a converter. The converter circuit 603 is a DC converter circuit. (also called DC-DC converter) can be used.

[0305] The power supply 602 may be, for example, a power storage device such as a lithium ion battery or a nickel metal hydride battery. Other power storage devices such as a nickel-cadmium battery or a lithium-ion capacitor may also be used. It is preferable to use a secondary battery that can be charged and discharged, but a primary battery may also be used.

[0306] In addition, if the power source 602 is rechargeable, it may be recharged wirelessly. The display circuit 601 includes an antenna for wireless charging and the like.

[0307] The conversion circuit 603 converts the potential of the power supply 602 into a desired potential and supplies it to the wiring ANODE. The conversion circuit 603 does not necessarily have to be provided.

[0308] The display circuit 611 in FIG. 15C is an example of a circuit having three power sources. In the circuit 140, a current is applied to the wiring ANODE, the wiring CATHODE, the wiring V0, and the wiring SL. This can be applied to the case where a potential is supplied to the wiring V0 and the wiring SL. In addition, when different potentials are supplied to the wiring V0 and the wiring SL, the number of conversion circuits 603 is increased. In addition, the wiring V0 and the wiring SL may be connected to the wiring ANODE or When the same potential as the wiring CATHODE is supplied, the redisplay circuit 601 in FIG. FIG. 15(D) is an example of a display circuit 611, and in addition to FIG. 15(B), The third power supply is provided to supply a potential to the wiring V0 and the wiring SL. The potential of the power supply 602 can be used as the power source. In this way, depending on the number of power supplies required, , the number of conversion circuits 603 and output terminals can be increased or decreased.

[0309] FIG. 15(E) is a modification of FIG. 15(B). Between the power supply 602 and the wiring ANODE, A switch SW is included. A timer is included to control the on / off timing of the switch SW. The switch SW and timer 621 are connected to the power supply 602 and the wiring ANODE With this configuration, it is possible to control the conduction or non-conduction between the A switch SW is provided between the power supply 602 and the wiring CATHODE. It is also possible to provide a switch SW between the display circuit and the circuit 140. The switch SW and the timer 621 may be applied to FIG.

[0310] FIG. 15(F) is an example of a circuit for performing a re-display operation in the circuit shown in FIG. 13. To display the image by the power supply, turn on switch SWa and turn off switch SWb. On the other hand, when displaying with an inverted signal, Switch SWb is turned on and switch SWa is turned off, and the power supply 602 and the wiring ANODE In this manner, the switching circuit having the switch SWa and the switch SWb This makes it possible to switch between the video signal and the inverted signal at predetermined intervals. The display circuit (F) may be connected to a light-emitting panel that holds multiple images. Electrically connect the wiring ANODEa to the wiring ANODE of the odd row, and the wiring ANODEb to the wiring ANODE of the even row. It can be electrically connected to the row wiring ANODE.

[0311] By using the above-mentioned display circuit, it is possible to display even if the driver circuit is removed from the light-emitting panel. Therefore, this is extremely effective for a light-emitting panel that cannot be equipped with a driving circuit. Examples of items that cannot be equipped with a drive circuit include items that are small, lightweight, or have a power supply that is too small. There are some things that are limited in number.

[0312] In addition, if the driving circuit 501 is not removed, the wiring ANODE and the wiring Since potential can be supplied to the CATHODE, the wiring V0, and the wiring SL, the redisplay circuit It is not necessary to use it.

[0313] <Light-emitting panel> The light-emitting panel of FIG. 16A includes a light-emitting element 801, a capacitor 102, and a switch SW1. , and switch SW2.

[0314] By turning on the switches SW1 and SW2, the video signal is written to the light-emitting panel. Specifically, a potential is input to one electrode of the capacitor 102 via a switch SW1. Vin is supplied to the other electrode of the capacitance element 102 via the switch SW2. A potential Vp is supplied. Then, the switch SW1 and the switch SW2 are turned off. A potential difference (Vin-Vp) between the electrodes of the capacitance element 102 is maintained. The potential difference is a voltage corresponding to the video signal.

[0315] The light emitting element 101 has a function of displaying light in response to a potential difference held in the capacitor element 102. As long as the circuit has the above function, there is no particular limitation on the circuit configuration. A switch SW1 is provided between one electrode of the capacitor 102 and a wiring that supplies a potential Vin. If a switch SW2 is provided between the other electrode of the terminal 102 and the wiring that supplies the potential Vp, good.

[0316] Transistors can be used as the switches SW1 and SW2. In this case, the above-described means for reducing the off-state current of the transistor can be applied.

[0317] In addition, the light-emitting panel of FIG. 16(A) performs the above-mentioned stop operations (0), (1), and For example, as operation (0), the switches SW1 and SW2 are turned on. Switch SW2 is turned off. If a transistor is used as the switch, Next, in operation (1), the potentials Vin and Vin are applied to the gate so that the gate is non-conductive. The potential Vp is set to the same potential as the potential supplied to the gate. Then, as operation (3), light is emitted. The driving of the panel is stopped. Specifically, the light-emitting panel and the The drive circuit is electrically disconnected from the potential Vin and the potential Vp and has a function of supplying a potential for controlling the on / off of the switches SW1 and SW2. This is what we have in mind.

[0318] In this manner, in the light-emitting panel of FIG. 16A, the stopping operation is performed, and the capacitance element 1 Voltage fluctuations or loss of voltage in 02 can be suppressed.

[0319] The light-emitting panel in FIG. 16B is a specific example of the light-emitting panel in FIG. The current flowing through the transistor 105 is controlled according to the voltage applied, and the light emitting element 101 is also supplied with the corresponding voltage. The circuit configuration of FIG. 16(B) is shown more specifically in the circuit of FIG. When the circuit 140 in FIG. 10 is applied, the potential Vin is supplied from the wiring SL. , potential Vp is supplied from the wiring V0, potential Va is supplied from the wiring ANODE, and potential Vc is supplied from the wiring CATHODE. A switch is provided between the display and redisplay periods, and the switch is controlled to be conductive or non-conductive. By doing so, the display or non-display may be controlled.

[0320] The light-emitting panel in FIG. 16(C) is a modified example of the panel in FIG. 16(B). The current flowing through the transistor 105 is controlled according to the voltage held in the capacitance element 102. The current can be passed through the optical element 101. In FIG. 16C, The switch SW3 provided between the wiring CATHODE and the transistor 105 is turned off. In the re-display operation, a potential that turns on the switch SW3 may be supplied. The potential Vp is the same as the potential Vc of the wiring CATHODE.

[0321] The light-emitting panel of FIG. 16(D) is a specific example of FIG. 16(A). The light-emitting panel of FIG. 16(D) The light emitting element 851, the capacitance element 102, the switch SW1, and the switch SW2 are included. A liquid crystal element, an electrophoretic element, or the like can be used as the light-emitting element 851. One electrode of the optical element 851 is electrically connected to one electrode of the capacitor 102 . The other electrode of the light emitting element 851 is electrically connected to the common line Vcom.

[0322] When the switch SW1 is on, a potential difference between the switch SW1 and the capacitor 102 is large. A potential Vin is supplied to one electrode of the light emitting element 851 via the potential Vin. When the switch SW2 is on, the other electrode of the capacitance element 102 is supplied with The potential Vcom is supplied through the switch SW2. By turning off W2, a potential difference between the electrodes of the capacitor 102 (Vin-Vc om) is maintained. The potential difference is a voltage according to the video signal.

[0323] The light emitting element 851 has a function of displaying light in response to a voltage held in the capacitor 102. Yes.

[0324] The light-emitting panel in FIG. 16(E) is a modified example of the light-emitting panel in FIG. 16(D). The difference from FIG. 16(D) is that The other electrode of the light-emitting element 851 is electrically connected to the other electrode of the capacitor 102. Second, it is electrically connected to the common line Vcom via the switch SW2.

[0325] The light-emitting panel in FIG. 16(F) is a modified example of the panel in FIG. 16(D). The differences from FIG. 16(D) are as follows: The other electrode of the light emitting element 851 is electrically connected to the common line Vcom via the switch SW3. The switch SW3 is turned on during the writing period or display period of the video signal. It would be better to change it to:

[0326] 16(D) to 16(F) are similar to FIG. 16(A), and are the same as the stop operation. 0), action (1), and action (3) can be applied. For example, as action (0), , the switch SW1, the switch SW2, and the switch SW3 are turned off. When a transistor is used, a potential is applied to the gate to make the transistor non-conductive. Next, in operation (1), the potential Vin and the potential Vcom are set to the same potential as the potential supplied to the gate. Then, as operation (3), the driving of the light-emitting panel is stopped. Electrically isolate the optical panel from the driver circuit used to write the video signal. Here, the drive circuit includes a potential Vin, a potential Vcom, a switch SW1, and a switch SW2. In this way, the function of the switch is to supply a potential to control the on / off of the 16(F) also, the stopping operation is performed to reduce the capacitance of the capacitor 102. Voltage fluctuations or loss of voltage can be suppressed.

[0327] The light-emitting panels of the above-mentioned FIG. 16(A) to FIG. 16(F) are configured such that one electrode and the other electrode of the capacitance element Each electrode is electrically connected to a switch, and turning off the switch turns off the capacitance element. The voltage between the electrodes of the electrodes can be maintained.

[0328] Transistors are used as the switches SW1, SW2, and SW3. In this case, the above-mentioned means for reducing the off-state current of the transistor can be applied. can be done.

[0329] The following is an example of a case where a drive circuit and a display circuit are connected to a light-emitting panel by switching between them. Shows.

[0330] FIG. 17A shows a state in which the light-emitting panel 701 and the driver circuit 501 are connected. The panel 701 includes the circuit 140 or the circuit 150 shown in FIG. 10 to FIG. 13. The filter 701 and the driving circuit 501 are connected via a connection portion 702. The connection unit 702 can perform write, hold, display, and stop operations. Owns a PC etc.

[0331] FIG. 17B shows a state in which the light-emitting panel 701 and the display circuit 601 are connected. The optical panel 701 and the display circuit 601 are connected via a connection portion 702. In this state, the re-display operation can be performed. Other circuits such as those shown in FIG.

[0332] In this way, the light-emitting panel 701 is connected to the driving circuit 501 or the display circuit 502 at the connection portion 702. This allows the driver circuit 501 to be electrically connected or disconnected. It is also possible to remove it and install a redisplay circuit 601 instead.

[0333] In FIG. 17, the light-emitting panel 701 and the connection portion 702 are shown separately. The panel 701 may have a connection portion 702 .

[0334] A more specific explanation will be given with reference to FIG.

[0335] FIG. 18A shows a light-emitting panel 701 provided on a member 1501 having a driving circuit 501. In this state, via the connection portion 702 shown in FIG. 17 (omitted in FIG. 18), The light-emitting panel 701 and the drive circuit 501 are electrically connected to each other. A video signal is written to the panel 701 from the driver circuit 501 .

[0336] Then, in the holding period, after the light-emitting panel 701 and the drive circuit 501 are disconnected, Remove member 1501 from panel 701.

[0337] FIG. 18B shows the removed light-emitting panel 701 attached to the member 15 having the display circuit 601. 02 shows the state before and after installation.

[0338] FIG. 18C is a modification of FIG. 18B, in which a light-emitting panel is attached to a member 1503 having a curved surface. This is an example in which the display circuit 601 is applied. The member 1503 may be one that always maintains a curved state. In addition, the member 1503 has flexibility (also called softness) and can be changed from a flat state to a curved state. The light-emitting panel 701 may be made of a flexible substrate. As the member 1503 or substrate having flexibility, a plastic substrate or the like is preferable. Some examples include:

[0339] FIG. 18(D) is a modification of FIG. 18(C). 03, a plurality of light-emitting panels 701 can be provided. The light-emitting panels 701 can be used as sticky notes or It can be attached to the member 1503 like a stamp. By simply providing the circuit 601, a plurality of light-emitting panels 701 can be provided.

[0340] FIG. 18(E) is a modification of FIG. 18(D). A display circuit 601 is provided on the member 1503. As in FIG. 18(D), a light-emitting panel 701 can be provided. 01 can be attached to the member 1503 like a sticky note or a stamp. 1503 does not require the display circuit 601 or connection wiring, etc., so the scope of application of the member 1503 is significantly improved.

[0341] In addition, a sensor is provided on the member 1502 or the member 1503, and light is emitted in response to a signal from the sensor. The panel 701 may be displayed, hidden, blinked, or the image may be switched. Examples of the sensor include an acceleration sensor, an angle sensor, a temperature sensor, and an optical sensor. The sensor detects the movement of the light-emitting panel, the surrounding temperature, the intensity of the incident light, etc. It is possible.

[0342] This embodiment mode can be combined with other embodiment modes as appropriate.

[0343] (Embodiment 5) In this embodiment, a usage example of a light-emitting device according to one embodiment of the present invention will be described with reference to FIGS. explain.

[0344] By using the light-emitting device of one embodiment of the present invention, electronic devices and lighting devices that can be used in a wide temperature range can be manufactured. Further, a small or thin electronic device or a lighting device can be manufactured by using the light-emitting device of one embodiment of the present invention. You can create devices.

[0345] The electronic device may be, for example, a television device (also called a television or television receiver). (c), computer monitors, digital cameras, digital video cameras, digital Photo frames, mobile phones (also called mobile phones or mobile phone devices), portable game machines, Examples include portable information terminals, audio playback devices, and large game machines such as pachinko machines.

[0346] Since the electronic device or lighting device according to one embodiment of the present invention is flexible, it can be attached to the inner wall or the wall of a house or a building. It may also be incorporated along an exterior wall or curved surface of the interior or exterior of the vehicle.

[0347] As shown in FIG. 19(A), the light-emitting device of one embodiment of the present invention is a device attached to clothing. It can also be used as a lighting device attached to protective clothing. It can also be used as an armband type device 82 or a wristband type device 83. can.

[0348] As shown in FIG. 19B, in the light-emitting device of one embodiment of the present invention, an opening is formed in a part of the encapsulant 40. The opening 84 may be provided so that a strap 85 or the like can be passed through. The periphery of the panel is sealed to prevent moisture and impurities from the air from entering the panel. It is preferable.

[0349] The light-emitting device according to one embodiment of the present invention can be used in a wide temperature range, and therefore can be used in an environment where humans cannot enter. For example, industrial robots can be used in high or low temperature environments. The device can be suitably used as a lighting device.

[0350] FIG. 19(C) shows a robot 1100, which has a torso, legs, a head, and arms. The robot 100 can be used to assist humans in care settings and other settings. It can be used as an industrial robot. Various sensors and elements are installed depending on the robot's application. It can be equipped with.

[0351] Sensors include, for example, force, displacement, position, speed, acceleration, angular velocity, rotation speed, distance, light, Liquid, magnetic, temperature, chemical, sound, time, hardness, electric field, current, voltage, power, radiation, flow rate , humidity, gradient, vibration, odor, or infrared measurement functions can be used. By providing a sensor, for example, data indicating the environment in which the robot 1100 is placed can be obtained. The robot 1100 can detect various data (such as temperature). The device may have a memory for storing the information.

[0352] For example, when a robot grasps a person or an object, it needs a tactile sensor that can measure pressure with high accuracy. Therefore, tactile sensors are densely distributed over the entire body of the robot 1100. It is preferable.

[0353] The light emitting device according to one embodiment of the present invention is provided on at least one of the torso, legs, head, and arms of the robot 1100. For example, the robot 1100 may be equipped with a lighting unit on its torso. 1102, lighting unit for legs 1103, lighting unit for head 1104, lighting unit for arms The present invention may be implemented by using at least one of the following: An optical device may be used.

[0354] In addition, the light-emitting device according to one embodiment of the present invention can be used in a wide temperature range, and therefore can be used in a mobile device (automotive device) or a It is suitable as a display portion for use in the interior or exterior of vehicles (cars, airplanes, trains, ships, etc.).

[0355] For example, an unmanned vehicle can be used to deliver packages. The drone is equipped with a GPS system. It may be possible to store luggage on board. The exterior may have a portion for fastening luggage.

[0356] Figure 19(D) shows a helicopter as an example of an unmanned transport vehicle. The display unit 1111 is provided with a flexible display device according to one embodiment of the present invention. It is preferable to use a light emitting device having the following formula:

[0357] The recipient of the package can check the contents, destination, sender, etc. of the package by looking at the display unit 1111. Yes, you can. Door 1110 allows loading and unloading of luggage into and out of the helicopter.

[0358] The display unit 1111 may have a touch panel function. A person unlocks door 1110 by entering a password to receive their package. It may be possible.

[0359] The display unit 1111 also has a biometric sensor (fingerprint sensor, retina sensor, vein sensor, etc.). For example, a biosensor may be used to detect whether the person operating the display unit 1111 is receiving the package. The door 1110 may be unlocked based on whether or not the person in question is an occupant.

[0360] The aircraft equipped with the light-emitting device according to one embodiment of the present invention is not limited to a helicopter, and may be an airship, a plane, or the like. The unmanned moving object is not limited to an aircraft, but may be a car, etc. This is also fine.

[0361] 20(A) to (D) show an example of an electronic device having a curved display unit 7000. The display surface of the display unit 7000 is curved, and display can be performed along the curved display surface. The display unit 7000 may be flexible.

[0362] The display portion 7000 is manufactured using a light-emitting device according to one embodiment of the present invention.

[0363] An example of a mobile phone is shown in FIG. 20A. The mobile phone 7100 includes a housing 7101, a display unit 7000, operation button 7103, external connection port 7104, speaker 7105, microphone 7 It has 106 etc.

[0364] A mobile phone 7100 shown in FIG. 20A includes a touch sensor in a display portion 7000. All operations, such as talking or entering text, can be done by using a finger or a stylus on the display. This can be done by touching 7000.

[0365] In addition, the operation button 7103 can be used to turn the power on and off, and to display the You can change the type of image displayed. For example, from the email composition screen, You can switch to the menu screen.

[0366] FIG. 20B shows an example of a television device. The television device 7200 includes a housing 72 A display unit 7000 is built into the housing 72.01. This shows a configuration that supports 01.

[0367] The television device 7200 shown in FIG. 20B is operated using an operation switch provided in the housing 7201. This can be done by a touch panel or a separate remote control 7211. The display unit 7000 may be provided with a touch sensor, and the operation may be performed by touching the display unit 7000 with a finger or the like. The remote control unit 7211 displays information output from the remote control unit 7211. The remote control 7211 may have an operation key or a touch panel. The channel and volume can be controlled by the control panel, and the image displayed on the display unit 7000 can be You can manipulate the image.

[0368] The television device 7200 is configured to include a receiver, a modem, and the like. It is possible to receive more general television broadcasts. It is also possible to receive wired or wirelessly via a modem. By connecting to a communication network, it is possible to communicate in one direction (from sender to receiver) or two directions ( It is also possible to communicate information between a sender and a receiver, or between receivers themselves.

[0369] FIG. 20C is a perspective view of the portable information terminal 7300, and FIG. 20D is a perspective view of the portable information terminal 7300. The portable information terminal 7300 includes a housing 7301 and a display portion 7000. In addition, the operation buttons, external connection ports, speakers, microphones, antennas, or batteries may be damaged. The display unit 7000 may include a touch sensor. The operation of the display 7000 can be performed by touching the display unit 7000 with a finger or a stylus.

[0370] The portable information terminal exemplified in this embodiment may be, for example, a telephone, a notebook, an information viewing device, or the like. The device has one or more selected functions. Specifically, it can be used as a smartphone. The portable information terminal exemplified in this embodiment is, for example, a mobile phone, an electronic mail Various functions such as browsing and writing text, playing music, internet communication, and computer games The application can be executed.

[0371] The mobile information terminal 7300 can display text and image information on multiple surfaces. For example, as shown in FIG. 20C, three operation buttons 7302 are displayed on one surface, and are represented by rectangles. In FIG. 20(C) and (D), the mobile information 7303 can be displayed on another surface. An example of information being displayed at the top of the terminal is shown below.

[0372] Examples of such information include notifications from social networking services (SNS), Displays notifying you of incoming e-mails or telephone calls, the subject or sender name of e-mails, etc. Date and time, battery level, antenna reception strength, etc. Or information is displayed Instead of information, an operation button, an icon, or the like may be displayed at the position where the button is pressed.

[0373] For example, the user of the portable information terminal 7300 may carry the portable information terminal 7300 in a breast pocket of a suit. When it is stored, the display (information 7303 in this example) can be confirmed.

[0374] Specifically, the telephone number or name of the caller of the incoming call is displayed on the mobile information terminal 7300. The user takes the portable information terminal 7300 out of his / her pocket and You can check the display and decide whether or not to answer the call without having to hang up.

[0375] 20(E) to (H) show an example of a portable information terminal having a flexible display unit 7001. show.

[0376] The display portion 7001 is manufactured using a light-emitting device according to one embodiment of the present invention. Light-emitting devices that can be bent from 0.01 mm to 150 mm can be applied. The display unit 7001 may be provided with a touch sensor, and the display unit 7001 may be turned on by touching the display unit 7001 with a finger or the like. It is possible to operate a portable information terminal.

[0377] 20(E) and (F) show an example of a foldable mobile information terminal. 20(F) shows the display unit 7001 folded inward. The portable information terminal 7650 is folded so that the 001 is on the outside. The mobile information terminal 7650 has a display portion 7001 and a non-display portion 7651. When not in use, the display unit 7001 can be folded inward. It can prevent dirt and scratches.

[0378] FIG. 20G shows an example of a flexible portable information terminal. The portable information terminal 7700 is The device has a housing 7701 and a display portion 7001. In addition, the device has a button 7703a as an input means, 7703b, speakers 7704a and 7704b as audio output means, and an external connection port 77 05, a microphone 7706, etc. The portable information terminal 7700 may be flexible. The battery 7709 may be mounted on the display unit 70. It may be placed overlapping with 01.

[0379] The housing 7701, the display portion 7001, and the battery 7709 are flexible. The portable information terminal 7700 can be curved into a desired shape or twisted. For example, the display unit 7001 of the portable information terminal 7700 can be mounted on the inside or outside of the device. Alternatively, the mobile information terminal 7700 can be folded so that it faces the side. In this manner, the housing 7701 and the display unit 700 can be used in a rolled-up state. Since the portable information terminal 7700 can freely deform, even if it is dropped or has the advantage that it is less likely to be damaged even if an unintended external force is applied.

[0380] In addition, since the portable information terminal 7700 is lightweight, the upper part of the housing 7701 can be held with a clip or the like. Or, the housing 7701 can be fixed to a wall with a magnet or the like. It can be conveniently used in a variety of situations.

[0381] FIG. 20H shows an example of a wristwatch-type portable information terminal. The device includes a display unit 7001, an input / output terminal 7802, and an operation button 7803. The housing 7801 functions as a housing. The battery 7805 can be mounted on the display unit 700. 1 or band 7801 may be placed overlapping it.

[0382] The band 7801, the display portion 7001, and the battery 7805 are flexible. The portable information terminal 7800 can be easily curved into a desired shape.

[0383] The operation button 7803 is used to set the time, turn the power on and off, and turn wireless communication on and off. It has various functions such as operation, silent mode activation and deactivation, power saving mode activation and deactivation, etc. For example, the operating system installed in the portable information terminal 7800 can The function of the operation button 7803 can also be freely set using the stem.

[0384] In addition, by touching an icon 7804 displayed on the display unit 7001 with a finger or the like, the application You can then launch the application.

[0385] In addition, the mobile information terminal 7800 is capable of performing short-distance wireless communication according to a communication standard. For example, by communicating with a wireless headset, You can also make calls.

[0386] The portable information terminal 7800 may also have an input / output terminal 7802. If the device has a connector, data can be exchanged directly with other information terminals. Charging can also be performed via the input / output terminal 7802. The charging operation of the portable information terminal shown in the example is performed by non-contact power transmission without using input / output terminals. It is also possible.

[0387] FIG. 21(A) shows the exterior of the automobile 9700. FIG. 21(B) shows the driver's seat of the automobile 9700. The automobile 9700 includes a body 9701, wheels 9702, a dashboard 9703, and a lighter. The light-emitting device of one embodiment of the present invention is used for a display portion of an automobile 9700 or the like. For example, the display portions 9710 to 9715 shown in FIG. A light-emitting device according to one aspect of the invention can be provided.

[0388] The display portion 9710 and the display portion 9711 are display devices provided on a windshield of an automobile. In the light-emitting device of one embodiment of the present invention, electrodes and wirings are formed using a light-transmitting conductive material. This allows the opposite side to be seen through, creating a so-called see-through state. For example, if the display portion 9710 and the display portion 9711 are in a see-through state, The light-emitting device according to one embodiment of the present invention can be used without obstructing the view even when the vehicle is in operation. The LED can be installed on the windshield of the automobile 9700. When a transistor for the purpose of the present invention is provided, an organic transistor using an organic semiconductor material is used. It is preferable to use a light-transmitting transistor such as a transistor including an oxide semiconductor. stomach.

[0389] The display unit 9712 is a display device provided on a pillar part. By displaying an image from the imaging means on the display unit 9712, the view blocked by the pillars can be compensated for. The display unit 9713 is a display device provided in the dashboard. For example, an image captured by an imaging means provided on the vehicle body is displayed on the display unit 9713. This can complement the view obstructed by the dashboard. By projecting images from the installed imaging means, blind spots can be filled and safety can be improved. In addition, by projecting an image that complements the invisible parts, it is possible to make the sense of discomfort more natural. Safety checks can be performed without any hassle.

[0390] FIG. 21(C) shows the interior of a car with bench seats for the driver and passenger. The display unit 9721 is a display device provided in the door section. By displaying the image from the imaging means on the display unit 9721, the view blocked by the door can be cleared. The display unit 9722 is a display device provided on the handle. The display unit 9723 is a display device provided in the center of the seat surface of the bench seat. The display device is installed on the seat or backrest, and the heat generated by the display device is It can also be used as a seat heater using the heat source.

[0391] The display unit 9714, the display unit 9715, or the display unit 9722 displays navigation information, speed Meters, tachometers, mileage, fuel level, gear status, air conditioning settings, etc. In addition, the display items and layout displayed on the display unit can be customized. The above information can be displayed on the display unit 97 as desired. 10 to 9713, the display portion 9721, and the display portion 9723. In addition, the display units 9710 to 9715 and the display units 9721 to 9723 are provided with lighting equipment. In addition, the display units 9710 to 9715 and the display unit 9 The display portions 721 to 9723 can also be used as heating devices.

[0392] A display portion to which the light-emitting device or the like according to one embodiment of the present invention is applied may be flat. The light emitting device or the like according to one embodiment may have a structure that does not have a curved surface or flexibility.

[0393] The portable game machine shown in FIG. 21D includes a housing 9801, a housing 9802, a display portion 9803, Display unit 9804, microphone 9805, speaker 9806, operation keys 9807, star Eras 9808 etc.

[0394] The portable game machine shown in FIG. 21(D) has two display units (display unit 9803 and display unit 9804). Note that the number of display units included in the electronic device of one embodiment of the present invention is not limited to two. The number of display units may be one or more. When an electronic device has multiple display units, at least At least one of the display portions may include a light-emitting device according to one embodiment of the present invention.

[0395] FIG. 21E shows a notebook personal computer having a housing 9821 and a display unit 9822. , a keyboard 9823, a pointing device 9824, etc.

[0396] This embodiment mode can be combined with other embodiment modes as appropriate.

[0397] (Embodiment 6) In this embodiment, an example of a pixel circuit that can be used in a light-emitting device of one embodiment of the present invention will be described. This will be described with reference to FIGS.

[0398] In this embodiment, the function of correcting the influence of fluctuations in the threshold voltage of a transistor, etc. 3 illustrates a pixel circuit.

[0399] The pixel circuit shown in FIG. 22A includes six transistors (transistors 303_1 to 303_2). 3-6), a capacitor 304, and a light-emitting element 305. The pixel circuit includes wirings 301_1 to 301_5, wirings 302_1 and 302_2. The transistors 303_1 to 303_6 are electrically connected to each other. For example, an N-type transistor can be used. Thus, a P-type polarity transistor may be used.

[0400] The pixel circuit shown in FIG. 22B is the pixel circuit shown in FIG. 22A, except that a transistor 303_ 22B. In addition, the pixel circuit shown in FIG. 22B includes wirings 301_6 and The wiring 301_7 is electrically connected to the wiring 301_5 and the wiring 301_6. The transistor 303_7 may be electrically connected to, for example, An N-type polarity transistor can be used. As shown in FIG. Transistors of any polarity may be used.

[0401] The pixel circuit shown in FIG. 23A includes six transistors (transistors 308_1 to 308_2). 8_6), a capacitor element 304, and a light-emitting element 305. The pixel circuit includes wirings 306_1 to 306_3 and wirings 307_1 to 307_3. Here, the wiring 306_1 and the wiring 306_3 are electrically connected. The transistors 308_1 to 308_6 may be, for example, N As shown in FIG. 25(A), a P-type transistor can be used. A transistor of the polarity may be used.

[0402] The pixel circuit shown in FIG. 23B includes two transistors (transistor 309_1 and transistor The capacitor 304_1 and the capacitor 304_2 are connected to the capacitor 304_3. 23B includes a wiring 31 and a light-emitting element 305. The wirings 311_1 to 311_3, the wiring 312_1, and the wiring 312_2 are electrically connected to each other. In addition, by configuring the pixel circuit as shown in FIG. 23(B), for example, The transistor 309_1 can be driven in a CVCC mode. For example, N-type transistors can be used for 309_1 and 309_2. As shown in FIG. 25(B), a P-type polarity transistor may be used.

[0403] This embodiment mode can be combined with other embodiment modes as appropriate.

[0404] (Embodiment 7) In this embodiment, a display device using MEMS that can be used for a display device according to one embodiment of the present invention will be described. An example of a display element using MEMS will be described with reference to Figs. 26 to 29. The organic EL element has high heat resistance and can be preferably used for the display device of one embodiment of the present invention.

[0405] The display device 160 shown in FIG. 26 includes a display unit 162 and a shutter-like light blocking means 164. Yes.

[0406] The shutter-like light blocking means 164 can be switched between a light blocking state and a light transmitting state. The light blocking means 164 may have a mechanism capable of switching between the light blocking state and the light transmitting state. For example, the light shielding layer may be made of a light shielding layer having an opening and a movable light shielding layer capable of shielding the opening. A shutter having a different structure may be used.

[0407] 27 is an exemplary isometric view of a display device 160. Display device 160 has a plurality of display elements arranged in rows and columns. A plurality of supports 166a to 166d (collectively referred to as supports 166) are arranged in The support 166 has a light shielding means 164 and an opening 172. The body 166a corresponds to the pixel 162a. Similarly, in 66d, the pixels 162b, 162c, and 162d are The display unit 162 is composed of pixels 162a to 162d. The support 166 itself is light-transmitting. 6 in a selectively transparent state, the display device 160 It is possible to generate pixels that can be displayed.

[0408] The display unit 162 may be a passive matrix type, or may be a type in which the elements are driven by transistors. In either case, each pixel may be an active matrix type. In order to improve the aperture ratio, it is necessary to provide wiring electrically connected to the It is preferable that the conductive film used as wiring in the display portion has a light-transmitting property.

[0409] When the display portion 162 is an active matrix type, the transistor is also made of a light-transmitting material. As the light-transmitting semiconductor film, an oxide semiconductor film is preferably used. The oxide semiconductor film is preferably an In-Sn-Ga-Zn oxide film or an In- Ga-Zn oxide, In-Sn-Zn oxide, In-Al-Zn oxide, Sn-Ga-Z n oxide, Al-Ga-Zn oxide, Sn-Al-Zn oxide, In-Zn oxide, Sn -Zn oxide, etc. are used.

[0410] The light blocking means 164 is a MEMS shutter formed using MEMS technology. 164 provides a MEMS structure section and a MEMS driving element section. The MEMS structure section includes three The device has a three-dimensional structure and multiple shutters, which are microstructures with some parts that can move. .

[0411] In addition to the light-shielding layer and the movable light-shielding layer, the MEMS structure has a movable light-shielding layer parallel to the substrate plane. The actuators are used to slide the movable light-shielding layer, and the structure supports the movable light-shielding layer. A detailed example of the structure of a MEMS shutter will be described later.

[0412] In addition, the transistor that drives the movable light-shielding layer via the actuator is the MEMS driving element. The transistors used in the MEMS driving element are made of a light-transmitting material. It is preferable to use a transistor similar to that used in the display unit 162. In addition, the conductive film used as the wiring of the MEMS driving element portion is preferably transparent. I wish.

[0413] In addition, each support 166 is electrically connected to a scanning line 174, a signal line 176, and a power line 178. The light blocking means 164 is switched between a light blocking state and a light transmitting state depending on the potential supplied from these wirings. Switch.

[0414] Next, a structural example of a MEMS shutter that can be used as the light blocking means 164 will be described. This will be explained using 28.

[0415] FIG. 28 shows a shutter 300. The shutter 300 is coupled to an actuator 310. The actuator 310 has a movable light blocking layer 332 with an opening 334. (not shown in the figure to avoid cluttering the drawing) and has two flexible actuators. One side of the movable light-shielding layer 332 is electrically connected to the actuator 315. The actuator 315 is connected to the structure 323 and the movable light blocking layer 332. It has the function of moving in the direction of the line segment connecting the body 327.

[0416] The actuator 315 is a movable electrode that is electrically connected to the movable light-shielding layer 332 and the structure 319. The movable electrode 325 is electrically connected to the electrode 321 and the structure 323. 5 is adjacent to the movable electrode 321, and one end of the movable electrode 325 is electrically connected to the structure 323. The other end is connected to the movable electrode 325, and the other end is free to move. The end of the movable electrode 321 is closest to the movable electrode 321 at the connection portion between the movable electrode 321 and the structure 319. It is curved like that.

[0417] The other side of the movable light-shielding layer 332 resists the force exerted by the actuator 310. The spring 317 is connected to the structure 327. Connected.

[0418] The structures 319, 323, and 327 are adjacent to the surface of the light-shielding layer having the opening 334. The movable light blocking layer 332, the actuator 315, and the spring 317 are arranged in a floating manner. It acts as a mechanical support for the

[0419] An opening 334 surrounded by the light-shielding layer is provided below the movable light-shielding layer 332. The shapes of the light blocking layer 332 and the opening 334 are not limited to those described above.

[0420] The shutter 300 includes a structure 323 that is electrically connected to a transistor (not shown). The transistor is a transistor for driving the movable light-shielding layer. A desired voltage is applied to the movable electrode 325 connected to the structure 323 via a transistor. In addition, the structure 319 and the structure 327 each have a ground electrode (GND ) is connected to the movable electrode 321 connected to the structure 319 and the structure 327. The potential of the connecting spring 317 is GND. 327 may be electrically connected to a common electrode to which any voltage can be applied. 319, the structure 327 is replaced with the actuator 310 to form two actuators 310 The shutter may have a function of

[0421] When a voltage is applied to the movable electrode 325, the potential difference between the movable electrode 325 and the movable electrode 321 As a result, the movable electrodes 321 and 325 are electrically attracted to each other. The movable light-shielding layer 332 connected to the pole 321 is attracted toward the structure 323, and the structure 32 3. The movable electrode 321 acts as a spring, so the movable electrode 321 and the movable When the potential difference between the movable electrode 321 and the electrode 325 is removed, the movable electrode 321 The movable light-shielding layer 332 is pushed back to its initial position while releasing the applied stress. In a state where the movable electrode 325 is attracted to the movable light shielding layer 332, the opening 334 is Alternatively, the movable light blocking layer 332 may be set so as not to overlap the opening 334. It may be set as follows.

[0422] The method for fabricating the shutter 300 will be described below. A sacrificial layer having a predetermined shape is formed on the substrate by a photolithography process. , polyimide, acrylic and other organic resins, silicon oxide, silicon nitride, silicon oxynitride The insulating film can be formed of an inorganic insulating film such as silicon nitride oxide.

[0423] Next, a light-shielding material is formed on the sacrificial layer by printing, sputtering, deposition, or other methods. After that, selective etching is performed to form the shutter 300. Examples of such metals include chromium, molybdenum, nickel, titanium, copper, tungsten, tantalum, Semiconductors such as neodymium, aluminum, and silicon, metals, alloys, and oxides are used. Alternatively, the shutter 300 can be formed by an inkjet method. It is preferable that 300 is formed to a thickness of 100 nm or more and 5 μm or less.

[0424] Next, the sacrificial layer is removed to form a movable shutter 300 in space. After this, the surface of the shutter 300 is oxidized by oxygen plasma, thermal oxidation, etc. It is preferable to form an oxide film. Alternatively, the shutter can be formed by atomic layer deposition or CVD. On the surface of 300, aluminum oxide, silicon oxide, silicon nitride, silicon oxynitride, Forming insulating films such as silicon oxynitride and DLC (Diamond-Like Carbon) By providing the insulating film on the shutter 300, This can reduce deterioration over time.

[0425] Next, the control circuit 250 including the light blocking means will be described with reference to FIG.

[0426] FIG. 29 is a schematic diagram of a control circuit 250 in the display device. The control circuit 250 controls the light blocking means. The shutter includes an actuator for blocking light and an actuator for transmitting light. The array of pixels in the support 256 includes a substantially rectangular pixel array. It is rectangular in shape and the pitch, i.e. the distance between pixels, is 180 μm to 250 μm. do.

[0427] The control circuit 250 has a scan line 254 for each pixel in each row, and , a first signal line 258a and a second signal line 258b. The first signal line 258a is A signal for putting the light blocking means into a light transmitting state is supplied to the first signal line 258b, and a signal for putting the light blocking means into a light blocking state is supplied to the second signal line 258c. The control circuit 250 further includes a charging line 262, an actuation line 264, and The charging line 262, the operating line 264 and the common power supply line 265 are connected to each other. 5 is shared among pixels in multiple rows and multiple columns in the array.

[0428] The support 256 containing each pixel includes a transistor 258 which charges to turn the light blocking means to a transparent state. 66 and a transistor 268 which discharges to make the light blocking means transparent. The transistor 268 is a transistor for writing data to make the light blocking means transparent. The transistor 266 is electrically connected to the capacitor 269. The transistor 268 is electrically connected to the actuator that causes the transistor to be in a transparent state.

[0429] Also, the support 256 including each pixel has a transistor that is charged to put the light blocking means into the light blocking state. and a transistor 272 which discharges to put the light blocking means into the light blocking state. The transistor 272 is connected to write data to put the light blocking means into the light blocking state. The transistor 277 is electrically connected to the capacitor 279. 70 and transistor 272 are electrically connected to an actuator that sets the light blocking state. .

[0430] In addition, the transistor 266, the transistor 268, the transistor 270, and the transistor 272 is a transistor using a material other than an oxide semiconductor for the channel region, and High speed operation is possible.

[0431] Furthermore, the transistors 267 and 277 are made of purified oxide semiconductors. A highly purified oxide semiconductor is used as the channel region. A transistor becomes non-conductive, causing a floating node (e.g., A node where the transistor 267, the transistor 268, and the capacitance element 269 are connected, At a node where the stator 272, the transistor 277, and the capacitance element 279 are connected Data can be retained and the off-current is extremely small. Refresh operations are unnecessary or the frequency of refresh operations is extremely low This makes it possible to sufficiently reduce power consumption.

[0432] In addition, a conductive layer is formed on the same plane as the oxide semiconductor films of the transistors 267 and 277. A conductive film is formed, and the conductive film is used as one of the electrodes of the capacitor 269 and the capacitor 279 . The step on the capacitor element formed using such a conductive film is small, and integration is easy. For example, a part of the light shielding means or a transistor may be formed on the capacitance element. The transistors overlap each other, so that a display device having a small occupation area and a miniaturized display device can be manufactured.

[0433] The control circuit 250 first applies a voltage to the charging line 262. The charging line 262 is connected to a transistor 266 and the gate and drain of transistor 270. The application of voltage causes transistor 266 and transistor 270 to conduct. 62 is applied with the minimum voltage (for example, 15 V) required to operate the shutter of the support 256. The actuator that sets the light blocking means to a light blocking state and the actuator that sets the light transmitting state are filled. After being charged, the charging line 262 goes to 0V, and the transistors 266 and 270 becomes non-conductive. The charge on both actuators is retained.

[0434] Each row of pixels is written with a write voltage V w By supplying While a particular row of pixels is being written, control circuitry 250 controls the data voltages to The signal is applied to either the first signal line 258a or the second signal line 258b corresponding to each column of the pixels. The voltage V applied to the scan line 254 of the row being written w When the transistor 2 in the corresponding row is turned on, 67 and transistor 277 are conductive. When the signal line 258a is turned on, the charge supplied from the first signal line 258a and the second signal line 258b is The capacitance elements 269 and 279 hold the potential.

[0435] In the control circuit 250, the enable line 264 is connected to a transistor 268 and a transistor 272. The differential line 264 is connected to the source of each of the common power supply line 265. By applying a large potential, the potentials held in the capacitors 269 and 279 are Regardless of the charge, transistor 268 and transistor 272 will never conduct. In the control circuit 250, the potential of the operation line 264 is set to be equal to or lower than the potential of the common power supply line 265. The transistor 268 or the transistor 272 is a capacitor 269 or The charge of the data stored in 279 determines whether it is conductive or non-conductive.

[0436] When the transistor 268 or the transistor 272 is conductive, the light blocking means is put into a light blocking state. The charge of the actuator or the charge of the actuator that is to be made transparent is supplied to transistor 268 or The current flows out through transistor 272. For example, by making only transistor 268 conductive, The charge of the actuator that is to be in the transparent state is transferred to the actuation line via transistor 268. As a result, the shutter of the support 256 and the actuator that makes it transparent are A potential difference is generated between the actuator and the shutter, and the shutter is electrically connected to the actuator that makes the shutter transparent. is attracted to the light and becomes transparent.

[0437] This embodiment mode can be combined with other embodiment modes as appropriate. EXAMPLES

[0438] In this example, a light-emitting device according to one embodiment of the present invention was manufactured, and the device was placed in ice-cold water (about 0° C.) or boiling water (about The device was operated in a temperature range of 100°C.

[0439] The sealed body of the light emitting device manufactured in this embodiment is shown in FIGS.

[0440] In this embodiment, organic EL elements were fabricated as the light-emitting elements of the light-emitting panel 10. As the secondary battery 20, a laminate type (also called a thin type) secondary battery was used. The substrate 55 is provided with the switch 51, the circuit 30, and the elements that constitute the circuit 50. A magnetic switch was used as switch 51.

[0441] <Production of light-emitting panel> In this embodiment, four types of light-emitting panels having blue, green, orange, and red light-emitting elements are provided. A method for manufacturing the light-emitting panel will be described with reference to FIGS. In order to operate the light-emitting panel at high temperatures, the glass transition temperature must be higher than the operating temperature. A light-emitting element was fabricated using the above materials.

[0442] First, an insulating layer 903 was formed on a substrate 901. The substrate 901 was a glass substrate. The insulating layer 903 is a silicon oxynitride film having a thickness of 200 nm formed by the CVD method. did.

[0443] Next, a conductive layer 911, a conductive layer 912, and an auxiliary electrode 921 were formed on the insulating layer 903. The conductive layer 911, the conductive layer 912, and the auxiliary electrode 921 are formed by a sputtering method. The titanium film is 50 nm thick, the aluminum film is 1200 nm thick, and the A laminated structure of the titanium film and the like was formed.

[0444] Next, a lower electrode 931 that functions as an anode was formed. A silicon-containing indium tin oxide (ITSO) film was formed by a deposition method. The film thickness was 110 nm.

[0445] Next, photosensitive polyimide is applied, exposed to light, developed, and baked to create a 1000 nm thick film. An insulating layer 925 was formed. After that, heat treatment was performed at 300° C. for 1 hour in a nitrogen atmosphere. .

[0446] Next, as a pretreatment for forming a light emitting element on the substrate 901, the surface of the substrate 901 is washed with water. After baking at 200°C for 1 hour, UV ozone treatment was performed for 370 seconds.

[0447] Then, 10 -4 The substrate 901 is introduced into a vacuum deposition apparatus whose inside has been decompressed to about Pa. After vacuum baking at 170° C. for 30 minutes in the heating chamber of the vacuum deposition apparatus, the substrate 901 It was allowed to cool for about 30 minutes.

[0448] Next, an EL layer 933 was formed on the lower electrode 931. The chemical formula of the material used for the EL layer 933 is The structure of the EL layer 933 is shown in FIG.

[0449] [ka]

[0450] [ka]

[0451] A method for producing the EL layer 933 will be described. First, the surface on which the lower electrode 931 is formed faces downward. In this manner, the substrate 901 on which the lower electrode 931 is formed is placed in a substrate holder provided in a vacuum deposition apparatus. 10 -4 After the pressure was reduced to about Pa, the hole injection layer 101 was formed on the lower electrode 931. 1 was formed.

[0452] The hole injection layer 1011 of the blue light emitting element is 9-phenyl-3-[4-(10-phenyl- 9-Anthryl)phenyl]-9H-carbazole (abbreviation: PCzPA) and molybdenum oxide The ratio of PCzPA to molybdenum oxide was 1:1 by weight. The ratio was adjusted to 2:1 (=PCzPA:molybdenum oxide). The thickness of the film was set to 50 nm. This is a deposition method in which deposition is performed simultaneously.

[0453] The hole injection layer 1011 of the green, orange, and red light emitting devices is 4,4',4''-(1,3 ,5-benzenetriyl)tri(dibenzothiophene) (abbreviation: DBT3P-II) and acid The layer was formed by co-evaporating DBT3P-II and molybdenum(VI) oxide. The weight ratio was adjusted to 2:1 (=DBT3P-II:molybdenum oxide). The thickness of the hole injection layer 1011 was 10 nm for the green light-emitting element, and In the child, it was set to 20 nm.

[0454] Next, a hole transport layer 1012 was formed on the hole injection layer 1011 .

[0455] The hole transport layer 1012 of the blue light emitting element is formed by evaporating PCzPA to a thickness of 10 nm. The glass transition temperature of PCzPA is 132°C.

[0456] The hole transport layer 1012 of the green, orange, and red light emitting devices is N-(1,1'-biphenyl) -4-yl)-N-[4-(9-phenyl-9H-carbazol-3-yl)phenyl] -9,9-Dimethyl-9H-fluorene-2-amine (abbreviation: PCBBiF) is evaporated onto the substrate. The thickness of the hole transport layer 1012 was 10 nm for the green light-emitting element, and For the red light emitting element, the thickness was set to 20 nm. The glass transition temperature of PCBBiF is 166°C. It is.

[0457] Next, the light-emitting layer 1013 was formed on the hole-transporting layer 1012 .

[0458] The light-emitting layer 1013 of the blue light-emitting element is made of 7-[4-(10-phenyl-9-anthryl)fluorene]. phenyl]-7H-dibenzo[c,g]carbazole (abbreviation: cgDBCzPA) and N, N'-bis(3-methylphenyl)-N,N'-bis[3-(9-phenyl-9H-fluoro] oren-9-yl)phenyl]-pyrene-1,6-diamine (abbreviation: 1,6mMemFL The film was formed by co-evaporation of PAPrn and cgDBCz. The ratio of PA to 1,6mMemFLPAPrn was 1:0.03 by weight (cgDBCzP A: 1,6mMemFLPAPrn). The glass transition temperature is 155°C.

[0459] The light-emitting layer 1013 of the green light-emitting element is made of 2-{3-[3-(2,8-diphenyldibenzothiazide 2-(4-phenyl)phenyl)dibenzo[f,h]quinoxaline (abbreviation: mDBTBPDBq-III), PCBBiF, and (acetylacetonato)bis(6- tert-Butyl-4-phenylpyrimidinato)iridium(III) (abbreviation: [Ir( The film was formed by co-evaporation of 2mDBT Weights of BPDBq-III, PCBBiF and [Ir(tBuppm)2(acac)] The ratio was 0.7:0.3:0.05 (=2mDBTBPDBq-III:PCBBiF:[ Ir(tBuppm)2(acac)]) layer, and the weight ratio is 0.8:0.2:0.05 (=2mDBTBPDBq-III:PCB The thickness of the film was adjusted so that BiF was [Ir(tBuppm)2(acac)]. The glass transition temperature of 2mDBTBPDBq-III is It is 150°C.

[0460] The light-emitting layer 1013 of the orange light-emitting element is made of 2mDBTBPDBq-III, PCBBiF, and Bis(acetylacetonato)bis(4,6-diphenylpyrimidinato)iridium(III) ) (abbreviation: [Ir(dppm)2(acac)]) was co-evaporated. 2mDBTBPDBq-III, PCBBiF and [Ir(dppm)2(acac )] weight ratio was 0.7:0.3:0.05 (=2mDBTBPDBq-III:PCB The thickness of the film was adjusted to 20 μm so that the thickness of the film was 20 μm. nm layer and the weight ratio is 0.8:0.2:0.05 (=2mDBTBPDBq-III: The film was deposited by adjusting the ratio of PCBBiF to [Ir(dppm)2(acac)]. A 20 nm thick layer was laminated.

[0461] The light-emitting layer 1013 of the red light-emitting element is made of 2mDBTBPDBq-III, PCBBiF, and and bis{4,6-dimethyl-2-[3-(3,5-dimethylphenyl)-5-phenyl- 2-Pyrazinyl-κN]phenyl-κC}(2,6-dimethyl-3,5-heptanedionato Iridium(III) (abbreviation: [Ir(dmdppr-P)2(di bm)]) was co-evaporated. The weight ratio of CBBiF and [Ir(dmdppr-P)2(dibm)] was 0.7:0. 3:0.05(=2mDBTBPDBq-III:PCBBiF:[Ir(dmdppr -P)2(dibm)]) and a layer having a thickness of 20 nm was formed by adjusting the weight ratio is 0.8:0.2:0.05 (=2mDBTBPDBq-III:PCBBiF:[Ir (dmdppr-P)2(dibm)]) The layers were laminated.

[0462] Next, the electron transport layer 1014 was formed on the light emitting layer 1013 .

[0463] The electron transport layer 1014 of the blue light-emitting element is made of cgDBCzPA with a thickness of 10 nm. 2,9-di(2-naphthyl)-4,7-diphenyl-1,10-phenanthrol The film was formed by evaporating phenanthrene (abbreviation: NBPhen) to a thickness of 15 nm. The glass transition temperature of NBPhen is 165°C.

[0464] The electron transport layer 1014 of the green, orange, and red light emitting devices was 2mDBTBPDBq-II The 2mD GaN was formed by evaporating I and then evaporating NBPhen to a thickness of 10 nm. The thickness of BTBPDBq-III was 10 nm for the green light-emitting element, and 10 nm for the orange and red light-emitting elements. In the child, it was set to 20 nm.

[0465] Next, lithium fluoride (LiF) was evaporated to a thickness of 0.1 nm to form an electron transport layer. An electron injection layer 1015 was formed on the transport layer 1014 .

[0466] Finally, an upper electrode 935 functioning as a cathode is made of aluminum with a thickness of 200 nm. Thus, the light emitting device of this example was fabricated.

[0467] In the above-mentioned deposition process, the deposition was all performed by a resistance heating method.

[0468] The element structure of the light-emitting element thus obtained is shown in Table 1.

[0469] [Table 1]

[0470] Next, in a nitrogen atmosphere, a UV-curable epoxy resin is used as the adhesive layer 927 to bond the substrate The substrate 901 and the glass substrate 991 were bonded together. A desiccant 913 was placed in a space 929 surrounded by the adhesive layer 927 and the substrate 91. With the area shielded from light, the adhesive layer 927 was irradiated with ultraviolet light to harden the resin. The mixture was subjected to a heat treatment at 80° C. for 1 hour under atmospheric conditions.

[0471] The light-emitting panel was fabricated in this manner. The light-emitting area of ​​the light-emitting panel fabricated in this example was 36 The light emitting region also includes a portion where auxiliary electrode 921 is formed.

[0472] The characteristics of the light-emitting panel are shown in Table 2.

[0473] [Table 2]

[0474] <Preparation of secondary battery> First, the thin secondary battery produced in this embodiment is shown in FIG.

[0475] The secondary battery of this embodiment includes a positive electrode 203, a negative electrode 206, a separator 207, an outer casing 219, a positive The positive electrode 226 has a positive lead electrode 226a and a negative lead electrode 226b.

[0476] FIG. 31(B) shows an external view of the positive electrode 203. The positive electrode 203 includes a positive electrode current collector 201, a positive electrode active material, and a The positive electrode current collector 201 is exposed in the tab region 281. In this embodiment, the positive electrode collector is welded to the positive electrode lead electrode 226a. A positive electrode 203 having a positive electrode active material layer 202 on one side of a current collector 201 and a positive electrode 203 having a positive electrode active material layer 202 on both sides of the positive electrode current collector 201 In the present embodiment, a positive electrode 203 having a positive electrode active material layer 202 was used.

[0477] FIG. 31C shows an external view of the negative electrode 206. The negative electrode 206 includes a negative electrode current collector 204, a negative electrode active material, and a negative electrode electrode 206a. The negative electrode current collector 204 is exposed in the tab region 282. In this embodiment, the negative electrode current collector is welded to the negative electrode lead electrode 226b. A negative electrode 206 having a negative electrode active material layer 205 on both sides of a body 204 was used.

[0478] Also, a cross-sectional view of the dashed line PQ in FIG. 31(A) is shown in FIG. A cross-sectional view between dashed and dotted lines RS in FIG.

[0479] In the secondary battery of this embodiment, a positive electrode 201 has a positive electrode active material layer 202 on one side of a positive electrode current collector 201. 2 positive electrodes 203 each having a positive electrode active material layer 202 on both sides of a positive electrode current collector 201. In addition, six negative electrodes 206 each having a negative electrode active material layer 205 on both sides of a negative electrode current collector 204 were used. The area of ​​the surface of the electrode 203 on the negative electrode 206 side and the area of ​​the surface of the negative electrode 206 on the positive electrode 203 side are approximately the same. It was quiet.

[0480] The separator 207 was folded in half so as to sandwich the negative electrode 206. The end of the positive electrode 203 was positioned outside the ends of the positive electrode 203 and the negative electrode 206 .

[0481] The area surrounded by the exterior body 219 was filled with the electrolyte 210 .

[0482] The method for producing the secondary battery of this embodiment will be described below.

[0483] First, the preparation of the positive electrode and the negative electrode will be described.

[0484] The composition and preparation conditions of the negative electrode active material layer are explained. 2 / g, Spheroidized natural graphite with an average particle size of 15 μm was used. Sodium dimethylcellulose and styrene-butadiene rubber (SBR) were used. The degree of polymerization of the CMC-Na used was 600-800, and the viscosity of the aqueous solution when used as a 1% aqueous solution was The viscosity ranged from 300 mPa·s to 500 mPa·s. The composition of the resin was graphite:CMC-Na:SBR=97:1.5:1.5 (wt%).

[0485] Next, the preparation of the paste for the negative electrode will be described.

[0486] First, the active material was weighed, and CMC-Na powder was added to obtain a first mixture.

[0487] Next, water was added to the first mixture, and the mixture was kneaded in a kneader to obtain a second mixture. The amount of water added was 38% of the total weight of the mixture. This refers to the mixing process using the method described above.

[0488] Next, add the aqueous dispersion of SBR to the second mixture, add more water, and mix in a mixer. , to obtain a third mixture.

[0489] Next, pure water, which is a dispersion medium, is added to the third mixture until a predetermined viscosity is reached, and the mixture is kneaded in a kneader. to obtain a fourth mixture.

[0490] Next, degassing was carried out under a reduced pressure atmosphere. Specifically, the pressure in the kneader containing the fourth mixture was reduced. The pressure difference with the atmospheric pressure was set to 0.096 MPa or less. A paste was prepared by the steps.

[0491] Next, the paste was applied to the negative electrode current collector using a continuous coater. The coating speed was 0.75 m / min.

[0492] Next, the negative electrode current collector on which the paste was applied was moved to a drying furnace to evaporate the solvent. The conditions were: 120 seconds at 50°C in air, 120 seconds at 80°C in air, and The process was then repeated for 10 seconds at 100°C under a reduced pressure for 10 hours. A negative electrode active material layer was formed on both sides of the electrode current collector.

[0493] Next, the composition and preparation conditions of the positive electrode will be described. 2 L / g Uses iFePO4, PVDF as a binder, and acetylene black as a conductive additive. The paste composition for preparing the electrode was LiFePO4:AB:P The VDF ratio was 85:7:8 (wt%).

[0494] Next, a method for preparing the paste for the positive electrode will be described.

[0495] First, PVDF and AB were kneaded using a kneader to obtain a first mixture.

[0496] Next, the active material was added to the first mixture, and the mixture was kneaded using a kneader to obtain a second mixture.

[0497] Next, NMP, a dispersion medium, was added to the second mixture, which was then kneaded using a kneader to produce the third mixture. A compound was obtained.

[0498] Next, the third mixture was kneaded under reduced pressure using a kneader. A paste was made.

[0499] Next, the prepared paste was applied to a positive electrode current collector. A continuous coater was used to coat the aluminum current collector (20 μm). The speed was 1 m / min. After that, the solvent was evaporated using a drying oven. The conditions were as follows: The temperature was 80°C for 4 minutes.

[0500] Next, the positive electrode active material layer was pressed by a roll press method to be compacted. The positive electrode current collector was heated at 170°C for 10 hours in air. A positive electrode active material layer was formed on both sides of the substrate.

[0501] The electrolyte contains 1-butyl-3-methylimidazolium bis(ethylene glycol) as a solvent. (Fluorosulfonyl)amide (abbreviation: BMI-FSA) is used as the electrolyte. Bis(fluorosulfonyl)amide (Li(FSO2)2N, abbreviated as LiFSA) was used. LiFSA was dissolved in BMI-FSA to obtain a LiFSA concentration of 1.8 mol / kg. An electrolyte solution was prepared.

[0502] [ka]

[0503] In this embodiment, an ionic liquid was used as the solvent for the electrolyte. Its flame temperature is extremely high at over 300℃, and it does not ignite even in high-temperature environments. The present invention can be suitably used in a secondary battery in which the

[0504] The results of measuring the flash point of the electrolyte used in this example are described below. The flash point was measured by the rapid equilibrium closed-cell method. The flash point was evaluated using a flash point test using a test tube. First, the sample was placed in a sample cup and heated for one minute. Then, the burner was placed close to the sample for 2.5 seconds or more to check whether it ignited. The evaluation was performed from 50°C to 300°C, and the samples heated to each temperature were different. In this experiment, the electrolyte did not ignite even when heated to 300°C, so the electrolyte The flash point of the liquid was found to be over 300°C.

[0505] The separator is a 50 μm thick solvent-spun regenerated cellulose fiber (TF40, Nippon Kodo Paper Co., Ltd. The exterior body is made of an aluminum film coated with a resin layer on both sides. was used.

[0506] Next, a method for producing a thin secondary battery will be described. In this embodiment, a light-emitting device that operates in ice-cooled water is used. We made two types of secondary batteries: one for a device that uses the battery and one for a light-emitting device that operates in boiling water. Made.

[0507] First, the positive electrode, negative electrode, and separator were cut. The size of the positive electrode and negative electrode was 20.49 mm, respectively. cm 2 After cutting, the separator was folded in half and two sides were fixed to form a bag shape. .

[0508] Next, the positive electrode active material and the negative electrode active material on the tab region were peeled off to expose the current collector.

[0509] Next, the exterior body was folded in half to sandwich the stacked positive electrode, separator, and negative electrode. The positive electrode and the negative electrode were laminated so that the positive electrode active material layer and the negative electrode active material layer faced each other. The positive and negative electrodes are placed in a pouch-shaped separator and stacked alternately with the positive electrodes. The laminated sheets were stacked alternately with a separator between them.

[0510] Next, the three sides of the exterior body were joined by heating, except for the side into which the electrolyte was injected. The sealing layer provided on the lead electrode was arranged so as to overlap the sealing portion of the exterior body.

[0511] After sealing two sides of the exterior body, the exterior body, the positive electrode, the separator, and the negative electrode wrapped in the exterior body are The heating conditions were 80°C under reduced pressure for 10 hours.

[0512] Next, under an argon gas atmosphere, an electrolyte was injected from the unsealed side. One side of the exterior body was sealed by heating under a reduced pressure atmosphere. A pond was created.

[0513] Next, the secondary battery was subjected to aging.

[0514] First, constant current charging was performed at a rate of 0.01C at 25°C. The charging conditions were: The limit was set.

[0515] Here, we will explain the charge rate and discharge rate. A charge rate of 1C is the capacity x (Ah ) cell is charged at a constant current and the charging is completed in exactly one hour. = I(A), then a charging rate of 0.2C is I / 5(A), i.e. Similarly, a discharge rate of 1C means that the capacity of the battery is 1000mA. This is the current value at which a cell of quantity X (Ah) is discharged at a constant current and the discharge is completed in exactly one hour. A discharge rate of 0.2C is I / 5(A), i.e., exactly 5 hours. This refers to the current value at which discharge ends.

[0516] Here, the theoretical capacity (170mAh / g) of the positive electrode active material LiFePO4 is used as the standard. The rate was calculated using the above.

[0517] Then, in an argon atmosphere, one side of the outer packaging was cut and opened to release the gas. Thereafter, one side of the opened exterior body was sealed again under a reduced pressure atmosphere.

[0518] Next, constant current charging was performed at a rate of 0.05 C at 25 °C. The charging conditions were as follows: The battery was discharged at a constant current of 0.2 C at 25°C. The discharge conditions were: V was set as the lower limit. In addition, the battery was charged and discharged twice at a rate of 0.2C at 25°C. The charging conditions were The upper limit was 4.0V, and the lower limit of the discharge conditions was 2.0V.

[0519] The charge and discharge characteristics of the secondary battery after the aging treatment were measured. The charging and discharging times were approximately 5 hours. The results are shown in Figure 34(A).

[0520] In the following, the theoretical capacity of the positive electrode active material LiFePO4 (135mAh / g) is used as the standard. Next, the rate was calculated for the secondary battery used in the light-emitting device operated in boiling water. The battery was charged at 5°C at a rate of 0.1C and discharged at 100°C at a rate of 0.2C. The charging conditions had an upper limit of 4.0V, and the discharging conditions had a lower limit of 2.0V.

[0521] Then, in an argon atmosphere, one side of the outer packaging was cut and opened to release the gas. Thereafter, one side of the opened exterior body was sealed again under a reduced pressure atmosphere.

[0522] To check the operation of both types of batteries, we charged and discharged them at a rate of 0.1C at 25°C for one minute. The charging condition was set to an upper limit of 4.0 V, and the discharging condition was set to a lower limit of 2.0 V.

[0523] In this manner, a secondary battery was fabricated. The charge and discharge characteristics of the secondary battery of this example were measured. The measurement results of the charge and discharge characteristics of a secondary battery used in a light-emitting device operated in a room are shown in FIG. The measurement results of the charge and discharge characteristics of a secondary battery used in a light-emitting device operated in boiling water are shown in Figure 34(C The capacity of the secondary battery produced in this example was found to be about 300 mAh.

[0524] The light-emitting device of this example was manufactured using the light-emitting panel and secondary battery manufactured as described above. In this embodiment, a circuit having a function of driving a light emitting element so that the light emitting element blinks is used. The road was used.

[0525] The light-emitting panel 10, the secondary battery 20, and the circuit board 55 are arranged as shown in FIGS. The secondary battery 20 was placed in a plastic case that transmits visible light. It was approximately 75mm x 80mm x 2.9mm and weighed about 15g.

[0526] 35(A) and (B) show the front surface (light emitting surface) and the back surface (light emitting surface and Opposite faces) are shown.

[0527] Then, the plastic case is inserted into the sealing body 40 and sealed, thereby completing the development of the present embodiment. An optical device was fabricated. For the sealing body 40, a plastic film that transmits visible light was used.

[0528] FIG. 36 shows a photograph of the light emitting device of this example emitting light at room temperature in an air atmosphere.

[0529] FIG. 37(A) shows a photograph of the light-emitting device of this example emitting light in ice-cold water (about 0° C.). The light-emitting device can be safely stored in antifreeze (containing water and ethylene glycol) at approximately 0°C. , it emitted light (blinked).

[0530] FIG. 37(B) shows the state in which the light emitting device of this embodiment is lit up in boiling water (about 100° C.). The light-emitting device emitted light (blinking) without any problems when immersed in boiling water.

[0531] The light emitting device of this embodiment uses the secondary battery 20 as a power source in both ice-cold water and boiling water. The light-emitting panel 10 could be made to blink for more than 8 hours. It was demonstrated that the light-emitting device was capable of stable operation at high and low temperatures.

[0532] As described above, it has been confirmed that the light emitting device of this embodiment can operate in ice-cold water and boiling water. I was able to acknowledge it. [Explanation of symbols]

[0533] 10 Light-emitting panel 11 Light emitting element 12a terminal 12b terminal 20 Secondary battery 21a electrode 21b Electrode 30 Circuit 31 Antenna 32 Controller 33a terminal 33b terminal 34 Terminals 35 Electronic Components 40 Sealing body 40a Encapsulation body 40b Sealing body 41 Sealing area 41a Sealing area 41b Sealing area 42 Space 42a Space 42b Space 45 Wiring 50 circuits 51 Switch 52a Terminal 52b Terminal 53a Wiring 53b Wiring 55 Circuit Board 61 Antenna 70 Flexible Area 80 Devices 81 Devices 82 Armband-type device 83 Bracelet-type device 84 Opening 85 Strap 86 Light-emitting part 100 Light emitting device 101 Light emitting element 102 Capacitive element 103 Transistor 104 Transistor 105 Transistor 105a Transistor 105b Transistor 111 Protection circuit 112 Transistor 113 Transistor 114 Wiring 115 Wiring 121 Protection circuit 122 Transistor 123 Transistor 124 Wiring 125 Wiring 140 circuits 140a circuit 140b circuit 150 circuits 160 Display device 162 Display section 162a pixels 162b pixels 162c pixels 162d pixels 164 Shading means 166 Support 166a Support 166b Support 166c support 166d Support 172 Opening 174 scan lines 176 Signal Line 178 Power line 201 Positive electrode current collector 202 Cathode active material layer 203 Positive electrode 204 Negative electrode current collector 205 Negative electrode active material layer 206 Negative electrode 207 Separator 208 Film 209 Film 210 Electrolyte 211 Positive electrode current collector 212 Cathode active material layer 214 Negative electrode current collector 215 Negative electrode active material layer 217 Separator 218 Film 225 Sealing layer 226 Lead Electrode 226a Positive lead electrode 226b Negative lead electrode 227 Thermocompression bonding area 231 Adhesive layer 232 Electrolyte 250 Control circuit 254 scan lines 256 Support 258a First signal line 258b second signal line 262 Charging line 264 Operating Line 265 Common power line 266 Transistor 267 Transistor 268 Transistor 269 ​​Capacitive Element 270 Transistors 272 Transistor 277 Transistors 279 Capacitive Element 298 Bulkhead 300 Shutter 301 Wiring 302 Wiring 303 Transistor 304 Capacitive element 305 Light emitting element 306 Wiring 307 Wiring 308 Transistor 309 Transistor 310 Actuator 311 Wiring 312 Wiring 315 Actuator 317 Spring 319 Structure 321 Movable Electrode 323 Structure 325 Movable Electrode 327 Structure 332 Movable light shielding layer 334 Opening 501 Drive circuit 502 Circuit 503 Circuit 601 Redisplay circuit 602 Power supply 603 Conversion Circuit 611 Redisplay circuit 621 Timer 701 Light-emitting panel 702 Connection 801 Light emitting element 845 Colored layer 847 Light blocking layer 851 Light emitting element 901 Board 902 Adhesive layer 903 Insulation Layer 907 Insulation Layer 908 Wiring 909 Insulation layer 909a FPC 909b FPC 911 Conductive layer 912 Conductive layer 913 Desiccant 920 Transistor 921 Auxiliary electrode 925 Insulation Layer 926 Spacer 927 Adhesive layer 928 Bulkhead 929 Space 930 Light emitting element 931 Lower electrode 932 Optical adjustment layer 933 EL layer 935 Upper electrode 941 Conductive layer 943 Insulation Layer 945 Insulation Layer 981 Conductive layer 982 Insulation layer 983 Conductive layer 984 Insulation Layer 991 Board 992 Adhesive layer 993 Insulation Layer 1011 Hole injection layer 1012 Hole transport layer 1013 Light-emitting layer 1014 Electron transport layer 1015 Electron injection layer 1100 Robot 1102 Lighting unit 1103 Lighting unit 1104 Lighting unit 1105 Lighting unit 1110 Door 1111 Display section 1501 Materials 1502 Materials 1503 Materials 7000 Display 7001 Display section 7100 Mobile Phone 7101 Case 7103 Operation button 7104 External connection port 7105 Speaker 7106 Microphone 7200 Television Equipment 7201 Case 7203 Stand 7211 Remote control device 7300 Mobile Information Terminal 7301 Case 7302 Operation button 7303 Information 7650 Mobile Information Terminal 7651 Hidden part 7700 Portable Information Terminal 7701 Case 7703a Button 7703b Button 7704a Speaker 7704b Speaker 7705 External connection port 7706 Mike 7709 Battery 7800 Mobile Information Terminal 7801 Band 7802 Input / output terminal 7803 Operation button 7804 Icons 7805 Battery 9700 Automobiles 9701 Body 9702 wheels 9703 Dashboard 9704 Light 9710 Display section 9711 Display section 9712 Display section 9713 Display section 9714 Display section 9715 Display section 9721 Display section 9722 Display section 9723 Display section 9801 Case 9802 Case 9803 Display section 9804 Display section 9805 Microphone 9806 Speaker 9807 Operation key 9808 Stylus 9821 Case 9822 Display section 9823 Keyboard 9824 Pointing Device

Claims

[Claim 1] The device includes a light-emitting panel, a secondary battery, a circuit, and a sealing body, The light-emitting panel has a light-emitting element, the light-emitting element has a function of emitting light using power supplied from the secondary battery, the secondary battery has a portion overlapping with the light-emitting panel, The circuit includes an antenna; the antenna has a portion overlapping with the light-emitting panel, the circuit has a function of wirelessly charging the secondary battery, the sealing body has therein the light-emitting panel, the secondary battery, and the circuit, At least a part of the sealing body has a function of transmitting light emitted by the light emitting element.

Images