Lighting devices and lighting fixtures

Abstract

The present invention provides a lighting device and lighting fixture that enable software writing to the memory unit after board mounting, without directly mounting a dedicated component used solely for connecting to a writing device onto the board. [Solution] A lighting device is provided comprising a circuit board, a memory unit mounted on the circuit board for storing software, a control unit that controls the lighting state of a light source based on the software and enables writing software to the memory unit based on signals input from an external source, and mounted components mounted on the circuit board, the mounted components having conductive parts which are exposed to the outside and connected to terminals for writing software to the memory unit of the control unit and are used for connecting to an external writing device, and enabling writing software to the memory unit by inputting signals from the writing device to the control unit.

Description

Technical Field

[0001] Embodiments of the present invention relate to a lighting device and a lighting fixture.

Background Art

[0002] There is a lighting device that lights a light source unit by supplying power to the light source unit. There is also a lighting fixture including a light source unit and a lighting device. The lighting device has a substrate and a control unit mounted on the substrate. The control unit controls the lighting state of the light source unit based on software stored in a storage unit. The control unit controls, for example, switching between lighting and extinguishing of the light source unit. The storage unit is provided inside the control unit. Alternatively, the storage unit is mounted on the substrate separately from the control unit and is electrically connected to the control unit.

[0003] In such a lighting device, for example, in order to cope with changes in product specifications or elimination of software defects, etc., after mounting the control unit and the storage unit on the substrate, there may be a case where software writing (rewriting) to the storage unit is required.

[0004] Software writing to the storage unit after substrate mounting is performed by an external writing device by connecting the external writing device to the control unit or the storage unit via a connector, a test pad, etc. Therefore, in order to perform software writing to the storage unit after substrate mounting, it is necessary to connect to a terminal (port) necessary for writing to the control unit or the storage unit and to provide a connector, a test pad, etc. for making a detachable connection with the writing device on the substrate in advance.

[0005] However, in lighting devices, miniaturization and space saving of the substrate are being promoted, and the space on the substrate for mounting dedicated members used only for connection with a writing device, such as connectors and test pads, is disappearing.

[0006] Therefore, it is desirable that lighting devices and lighting fixtures allow software to be written to the memory unit after it has been mounted on the circuit board, without directly mounting a dedicated component used solely for connecting to the writing device onto the circuit board. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2000-285095 [Overview of the project] [Problems that the invention aims to solve]

[0008] Embodiments of the present invention provide a lighting device and a lighting fixture that enable software writing to a memory unit after board mounting without directly mounting a dedicated component used solely for connection to a writing device onto the board. [Means for solving the problem]

[0009] According to the embodiment, a lighting device is provided which is connected to a light source and a power supply, and which lights up the light source by supplying a predetermined amount of power to the light source based on the power supplied from the power supply, the device comprising a circuit board, a storage unit mounted on the circuit board and storing software, a control unit which controls the lighting state of the light source based on the software stored in the storage unit and enables writing the software to the storage unit based on a signal input from an external source, and a mounted component mounted on the circuit board, the mounted component having a conductive part, the conductive part being provided so as to be exposed to the outside, and connected to a terminal of the control unit for writing the software to the storage unit, and is used for connection to an external writing device, and enables writing the software to the storage unit by inputting a signal input from the writing device to the control unit. [Effects of the Invention]

[0010] A lighting device and lighting fixture are provided that allow software to be written to the memory unit after it has been mounted on the circuit board, without directly mounting a dedicated component used solely for connecting to a writing device onto the circuit board. [Brief explanation of the drawing]

[0011] [Figure 1] This is a schematic block diagram showing a lighting fixture according to the embodiment. [Figure 2] Figures 2(a) and 2(b) are schematic block diagrams showing a part of the lighting device according to the embodiment. [Figure 3] This is a schematic block diagram showing a modified example of the lighting fixture according to the embodiment. [Modes for carrying out the invention]

[0012] Each embodiment will be described below with reference to the drawings. Please note that the drawings are schematic or conceptual, and the relationships between the thickness and width of each part, as well as the ratios of the sizes of the parts, are not necessarily identical to those of reality. Furthermore, even when representing the same part, the dimensions and ratios may differ between drawings. In this specification and in each figure, elements similar to those described above are denoted by the same reference numerals, and detailed explanations are omitted as appropriate.

[0013] Figure 1 is a schematic block diagram showing a lighting fixture according to an embodiment. As shown in Figure 1, the lighting fixture 2 comprises a light source unit 4 and a lighting device 10. The lighting device 10 is connected to the light source unit 4. The light source unit 4 is, for example, detachably connected to the lighting device 10. The lighting device 10 is also connected to a power supply PS. The lighting device 10 lights the light source unit 4 by supplying a predetermined amount of power to the light source unit 4 based on the power supplied from the power supply PS. In Figure 1, for convenience, wiring connections related to the power supply are shown with solid lines, and wiring connections related to signals are shown with dashed lines.

[0014] The light source unit 4 has a light source. The light source unit 4 has, for example, multiple light sources connected in series, parallel, or series-parallel. However, the number of light sources provided in the light source unit 4 may be arbitrary. For example, there may be just one light source.

[0015] The light source of the light source unit 4 is, for example, a light-emitting diode (LED). The light source unit 4 is, for example, an LED lamp. The light source may also be, for example, an organic light-emitting diode (OLED), an inorganic electroluminescent light-emitting element, an organic electroluminescent light-emitting element, or other electroluminescent light-emitting elements. The light source may also be, for example, a light bulb. The light source may be any light source capable of emitting light based on the supply of power.

[0016] The lighting device 10 includes a power supply unit 20, a control unit 22, and wiring members 24. The power supply unit 20 includes a power supply board 30, a power supply circuit 32, a switching circuit 34, and a connector 36. The control unit 22 includes a control board 40, a control unit 42, a motion sensor 44, an illuminance sensor 46, a time switch 48, a light / dark switch 50, and a connector 52.

[0017] One end of the wiring component 24 is detachably connected to the connector 36 of the power supply unit 20. The other end of the wiring component 24 is detachably connected to the connector 52 of the control unit 22. In this way, the wiring component 24 detachably connects the power supply unit 20 and the control unit 22.

[0018] At one end and the other end of the wiring member 24, connectors (not shown) corresponding to the connectors 36 and 52, for example, are provided. The connectors 36 and 52 are, for example, one of a plug and a receptacle, and the connectors at one end and the other end of the wiring member 24 are, for example, the other of the plug and the receptacle. Thereby, the wiring member 24 is detachably connected to the power supply unit 20 and the control unit 22.

[0019] Note that the wiring member 24 does not necessarily have to be detachable from the power supply unit 20. One end of the wiring member 24 may be directly connected to the power supply board 30, for example. The power supply unit 20 does not necessarily have to have the connector 36. The configuration of the wiring member 24 may be any configuration that is at least detachably connected to the connector 52 of the control unit 22 and can be in a state where the connection between the connector 52 and the power supply unit 20 is eliminated.

[0020] Also, the control unit 22 may be detachably connected to the power supply unit 20, for example, by directly connecting the connector 52 to the connector 36 of the power supply unit 20 without passing through the wiring member 24. The lighting device 10 does not necessarily have to have the wiring member 24. The connection configuration between the power supply unit 20 and the control unit 22 may be any configuration that can detachably connect the power supply unit 20 and the control unit 22 and can be in a state where the connection between the connector 52 and the power supply unit 20 is eliminated.

[0021] The power supply circuit 32, the switching circuit 34, and the connector 36 are mounted on the power supply board 30. The power supply board 30 is, for example, a printed wiring board. The power supply board 30 supports the power supply circuit 32, the switching circuit 34, and the connector 36 and performs electrical wiring for the power supply circuit 32, the switching circuit 34, and the connector 36.

[0022] The power supply circuit 32 is connected to the power supply PS and is also connected to the connector 36. The power supply circuit 32 converts the power supplied from the power supply PS into power corresponding to the control unit 22. The power supply circuit 32 is connected to the control unit 22 via the connector 36 and the wiring member 24. The power supply circuit 32 supplies the converted power to the control unit 22 via the connector 36 and the wiring member 24.

[0023] The power of the power supply PS is, for example, AC power. The power supply PS is, for example, an AC commercial power supply. The power supply circuit 32 converts, for example, the 100V (rms) AC power supplied from the power supply PS into 5V DC power corresponding to the control unit 22. The power supply circuit 32 is composed of, for example, a rectifier circuit, a smoothing capacitor, a step-down circuit, etc. However, the configuration of the power supply circuit 32 is not limited to this, and any configuration that can appropriately convert the power supplied from the power supply PS into power corresponding to the control unit 22 may be used.

[0024] The switching circuit 34 is connected to the power supply PS and is also connected to the connector 36. The switching circuit 34 is connected to the control unit 22 via the connector 36 and the wiring member 24 and receives an input of a control signal from the control unit 22. The switching circuit 34 switches between a state of supplying the power supplied from the power supply PS to the light source unit 4 and a state of stopping the supply of power to the light source unit 4 based on the control signal input from the control unit 22. The light source unit 4 lights up (irradiates light) based on the supply of power from the switching circuit 34. The light source unit 4 lights up the light source by, for example, converting the AC power supplied from the switching circuit 34 (lighting device 10) into DC power corresponding to the light source and supplying the converted DC power to the light source. Thereby, based on the control signal input from the control unit 22, the lighting and extinguishing of the light source unit 4 can be switched.

[0025] In this example, connectors 36 and 52 are 3-pin connectors having, for example, two pins (e.g., +5V and ground) for supplying power from the power supply circuit 32 to the control unit 22, and one pin for inputting a control signal from the control unit 22 to the switching circuit 34. The wiring member 24 has three wires corresponding to connectors 36 and 52. However, the number of pins in connectors 36 and 52 is not limited to these and can be any number of pins depending on the configuration of the power supply unit 20 and the control unit 22. The number of wires in the wiring member 24 can be any number corresponding to the number of pins in connectors 36 and 52.

[0026] The control unit 42, motion sensor 44, illuminance sensor 46, time switch 48, light / dark switch 50, and connector 52 are mounted on the control board 40. The control board 40 is, for example, a printed circuit board. The control board 40 supports the control unit 42, motion sensor 44, illuminance sensor 46, time switch 48, light / dark switch 50, and connector 52, and also handles the electrical wiring of the control unit 42, motion sensor 44, illuminance sensor 46, time switch 48, light / dark switch 50, and connector 52.

[0027] The control unit 42, motion sensor 44, illuminance sensor 46, time switch 48, and light / dark switch 50 operate based on power supplied from the power supply unit 20 (power supply circuit 32) via connectors 36, 52 and wiring member 24.

[0028] The control unit 42 has a memory unit 54. The memory unit 54 stores the software 54a. The memory unit 54 is, for example, an internal memory built into the control unit 42. The control unit 42 is, for example, a microcontroller having internal memory.

[0029] The control unit 42 controls the lighting state of the light source unit 4 based on the software 54a stored in the memory unit 54. The control unit 42 controls the switching of the light source unit 4 on and off by, for example, transmitting a control signal to the switching circuit 34 via the connectors 36, 52 and the wiring member 24.

[0030] Furthermore, the control unit 42 enables writing (rewriting) of software 54a to the storage unit 54 based on signals input from an external source. By enabling the control unit 42 to write software 54a to the storage unit 54 at any time, it is possible to respond to changes in product specifications or to resolve defects in software 54a, for example.

[0031] The motion sensor 44 detects a human body that is within a predetermined range from the light source unit 4 (lighting fixture 2). In other words, the motion sensor 44 detects a human body approaching the light source unit 4. The motion sensor 44 inputs the human body detection result to the control unit 42.

[0032] The control unit 42 controls the switching of the light source unit 4 on and off based on the detection result of the motion sensor 44, for example. For example, the control unit 42 turns on the light source unit 4 when the detection result of the motion sensor 44 switches from a state where no human body is detected to a state where a human body is detected, and turns off the light source unit 4 after a predetermined delay time has elapsed after the detection result of the motion sensor 44 switches from a state where a human body is detected to a state where no human body is detected. In this way, the light source unit 4 can be automatically turned on when a person approaches the light source unit 4 (lighting fixture 2) and the light source unit 4 can be automatically turned off when a person moves away from the light source unit 4.

[0033] The illuminance sensor 46 detects the brightness around the light source unit 4 (lighting fixture 2) and inputs the detection result to the control unit 42.

[0034] The control unit 42 controls the switching of the light source unit 4 on and off based on the detection result of the illuminance sensor 46, for example. The control unit 42 turns on the light source unit 4 when the detection result of the illuminance sensor 46 falls below a predetermined brightness, and turns off the light source unit 4 when the detection result of the illuminance sensor 46 rises above the predetermined brightness. In this way, the light source unit 4 can be automatically turned on and off according to the brightness around the light source unit 4.

[0035] The control unit 42 may, for example, combine the detection results of the motion sensor 44 and the illuminance sensor 46, and enable the turning on and off of the light source unit 4 based on the detection result of the motion sensor 44 when the detection result of the illuminance sensor 46 is below a predetermined brightness.

[0036] The time switch 48 allows you to change the length of the delay time between when the detection result of the motion sensor 44 switches from detecting a human body to not detecting a human body, and when the light source unit 4 is turned off, in multiple stages.

[0037] For example, after the detection result of the motion sensor 44 switches from a state in which a human body is detected to a state in which a human body is not detected, the control unit 4 turns off the light source unit 4 according to the elapsed time set by the time switch 48.

[0038] The brightness switch 50 allows the control unit 42 to change the brightness threshold for switching the light source unit 4 on and off based on the detection result of the illuminance sensor 46 in multiple stages. For example, the control unit 42 turns on the light source unit 4 when the detection result of the illuminance sensor 46 falls below the brightness set by the brightness switch 50, and turns off the light source unit 4 when the detection result of the illuminance sensor 46 rises to or exceeds the brightness set by the brightness switch 50.

[0039] The time switch 48 and the brightness switch 50 are, for example, slide switches or rotary switches that allow multiple setting changes depending on the position of the operating part. However, the configuration of the time switch 48 and the brightness switch 50 is not limited to these, and any configuration that allows each setting to be changed in multiple stages is acceptable.

[0040] Thus, the control unit 42 controls the switching of the light source unit 4 on and off based on the detection results of the motion sensor 44 and the illuminance sensor 46, for example. However, the control unit 42 may also change the brightness and color of the light emitted from the light source unit 4 by inputting a control signal such as a PWM signal to the light source unit 4. In other words, the control unit 42 may perform dimming control and color adjustment control of the light source unit 4. In this case, the control unit 22 may be provided with, for example, an operation unit for changing the brightness of the light emitted from the light source unit 4 or an operation unit for changing the color of the light emitted from the light source unit 4, instead of the motion sensor 44, illuminance sensor 46, time switch 48, and brightness switch 50, for example.

[0041] The control of the lighting state of the light source unit 4 by the control unit 42 is not limited to controlling the switching between turning the light source unit 4 on and off, but may also be limited to controlling the brightness of the light emitted from the light source unit 4, or controlling the color of the light emitted from the light source unit 4, etc. The control of the lighting state of the light source unit 4 by the control unit 42 is not limited to these, but may be any control that can appropriately control the lighting state of the light source unit 4 based on the software 54a stored in the memory unit 54.

[0042] In this example, AC power is supplied from the lighting device 10 (power supply unit 20) to the light source unit 4. The power supplied from the lighting device 10 to the light source unit 4 is not limited to AC power; DC power may also be supplied. The control unit 42 may perform dimming control, color temperature control, etc., by controlling, for example, the magnitude of the DC power supplied from the power supply unit 20 to the light source unit 4.

[0043] The time switch 48 has a conductive part 48a that is exposed to the outside. Similarly, the light switch 50 has a conductive part 50a that is exposed to the outside. The conductive parts 48a and 50a are connected to terminals (ports) for writing software 54a to the memory unit 54 of the control unit 42. The conductive parts 48a and 50a are electrically connected to the terminals of the control unit 42, for example, via dedicated wiring or a control board 40. The method of connecting the conductive parts 48a and 50a to the terminals of the control unit 42 may be any method that enables signal input to the terminals of the control unit 42 via the conductive parts 48a and 50a.

[0044] The conductive parts 48a and 50a are each connected to different terminals of the control unit 42. More specifically, conductive part 48a is connected to one terminal of the control unit 42 for writing software 54a to the storage unit 54, and conductive part 50a is connected to another terminal of the control unit 42 for writing software 54a to the storage unit 54.

[0045] The control unit 42 writes software 54a to the storage unit 54 using, for example, the SWD (Serial Wire Debug) method. In order to write software 54a to the storage unit 54 using the SWD method, it is necessary to input two signals, SWDIO and SWCLK, to the control unit 42 (storage unit 54). Conductive part 48a is connected, for example, to a terminal of the control unit 42 for inputting one of SWDIO and SWCLK. Conductive part 50a is connected, for example, to a terminal of the control unit 42 for inputting the other of SWDIO and SWCLK.

[0046] However, the method of writing the software 54a to the storage unit 54 of the control unit 42 is not limited to the above, and any method that is capable of properly writing the software 54a to the storage unit 54 may be used. In this example, two conductive parts 48a and 50a corresponding to the SWD method are provided. The number of conductive parts provided in the lighting device 10 is not limited to two, and may be any number corresponding to the method of writing the software 54a to the storage unit 54 of the control unit 42. The signals input to the control unit 42 via the conductive parts 48a and 50a may be any signals necessary for the control unit 42 to write the software 54a to the storage unit 54.

[0047] Figures 2(a) and 2(b) are schematic block diagrams showing a part of the lighting device according to the embodiment. Figure 2(a) schematically represents the normal operating state of the control unit 22. Figure 2(b) schematically represents the state when writing software 54a to the control unit 22.

[0048] As shown in Figure 2(a), under normal operating conditions, the control unit 22 is connected to the power supply unit 20 via the connector 52 and the wiring member 24. In this case, the control unit 22 receives power from the power supply unit 20 and operates based on the supplied power.

[0049] On the other hand, as shown in Figure 2(b), when writing software 54a, the control unit 22 disconnects the connector 52 from the wiring member 24 (power supply unit 20) and connects to an external programming device 60 via the connector 52. In this case, the control unit 22 receives power from the programming device 60 and operates based on the supplied power. The programming device 60 may also be called a debugger, for example.

[0050] In other words, the power supply unit 20 is connected to the power supply PS and converts the power supplied from the power supply PS into power corresponding to the control unit 42. In other words, the connector 52 is mounted on the control board 40 and is detachably connected to the power supply unit 20 and also connected to the control unit 42. The connector 52 may be mounted directly on the control board 40, or it may be mounted on the control board 40 via wiring or the like.

[0051] In normal use, when controlling the lighting state of the light source unit 4, the control unit 42 operates based on power supplied from the power supply unit 20 via the connector 52. When writing software 54a to the storage unit 54, the control unit 42 operates based on power supplied from the writing device 60 via the connector 52 by connecting the connector 52 to the writing device 60.

[0052] The writing device 60 is connected to the control unit 42 via the connector 52, and also to the conductive parts 48a and 50a, and is connected to the control unit 42 via the conductive parts 48a and 50a. The writing device 60 operates the control unit 42 by supplying power to the control unit 42 via the connector 52, and writes software 54a to the storage unit 54 of the control unit 42 by inputting predetermined signals to the control unit 42 via the conductive parts 48a and 50a. The predetermined signals are, as described above, for example, the SWDIO and SWCLK signals of the SWD method.

[0053] The connection between the writing device 60 and the conductive parts 48a and 50a is made, for example, by bringing the tip of a wire or probe extending from the writing device 60 into contact with the conductive parts 48a and 50a. However, the method of connecting the writing device 60 and the conductive parts 48a and 50a is not limited to the above, and any method that allows a signal to be appropriately input from the writing device 60 to the control unit 42 is acceptable.

[0054] Thus, the conductive parts 48a and 50a are provided so as to be exposed to the outside, and are connected to terminals for writing software 54a to the storage unit 54 of the control unit 42, and are also used to connect to the writing device 60, and input signals from the writing device 60 to the control unit 42.

[0055] Furthermore, as shown in Figures 2(a) and 2(b), the control unit 42 may be able to use the terminal that outputs control signals to the power supply unit 20 (switching circuit 34) as a terminal for inputting another signal. Figure 2(b) shows an example in which a reset signal is input from the programming device 60 to the terminal that outputs control signals to the control unit 42. The reset signal is, for example, a signal for initializing the operating state of the control unit 42.

[0056] The programming device 60, for example, supplies power to the control unit 42 via the connector 52 to operate the control unit 42, and then inputs a reset signal to the control unit 42 to initialize its operating state, thereby stabilizing the operating state of the control unit 42. After inputting the reset signal to the control unit 42 and initializing its operating state, the programming device 60 inputs SWDIO and SWCLK signals to the control unit 42 via the conductive parts 48a and 50a, thereby writing the software 54a to the storage unit 54 of the control unit 42. This makes the writing of the software 54a to the storage unit 54 of the control unit 42 more stable.

[0057] Furthermore, the signal input to the control unit 42 via connector 52 is not limited to a reset signal, but can be any signal necessary for writing software 54a to the storage unit 54 of the control unit 42. Also, the reset signal is not limited to the path via connector 52, but may be input to the control unit 42 from another conductive part.

[0058] For example, if there are unused pins on the connector 52 that are not used when connected to the power supply unit 20, the programmer 60 may input a signal to the control unit 42 via the unused pins on the connector 52 by connecting the unused pins to the terminals of the control unit 42. In other words, the terminals on which the programmer 60 inputs a signal to the control unit 42 do not necessarily have to be the same as the terminals on which the control unit 42 outputs a control signal to the power supply unit 20.

[0059] The conductive part 48a is, for example, at least part of the outer casing of the time switch 48. Similarly, the conductive part 50a is, for example, at least part of the outer casing of the light switch 50. For example, metal materials are used for the conductive parts 48a and 50a. The conductive parts 48a and 50a are, for example, at least part of the metal casings of the time switch 48 and the light switch 50.

[0060] As shown in Figures 2(a) and 2(b), the control unit 42 has a switching element 56. The switching element 56 is connected to the conductive parts 48a and 50a and switches between a first state in which the potential of the conductive parts 48a and 50a is set to a reference potential and a second state in which the setting of the potential of the conductive parts 48a and 50a to the reference potential is released.

[0061] The first state is, for example, when the switching element 56 is turned ON, and the conductive parts 48a and 50a are electrically connected to the reference potential portion within the control unit 42. The second state is, for example, when the switching element 56 is turned OFF, and the conductive parts 48a and 50a are electrically disconnected (insulated) from the reference potential portion within the control unit 42. The reference potential is, for example, the earth potential (ground potential).

[0062] In the normal operating state when the connector 52 is connected to the power supply unit 20 and the control unit 4 controls the lighting state, the control unit 42 sets the potential of the conductive parts 48a and 50a to a reference potential by setting the switching element 56 to a first state. This makes it possible to suppress at least one of the electromagnetic noise radiated to the outside from the time switch 48 and the light switch 50, and the electromagnetic noise flowing into the time switch 48 and the light switch 50 from the outside. In other words, in the normal operating state of the control unit 42, the conductive parts 48a and 50a can be used as shields against electromagnetic noise.

[0063] Then, when the connector 52 is connected to the writing device 60 and software 54a is being written to the storage unit 54, the control unit 42 sets the switching element 56 to a second state, thereby releasing the setting of the potential of the conductive parts 48a and 50a to the reference potential. This prevents the signal input from the writing device 60 to the control unit 42 from flowing to the reference potential side.

[0064] However, the conductive parts 48a and 50a do not necessarily have to be used as shields under normal operating conditions. The conductive parts 48a and 50a do not necessarily have to constitute at least a part of the outer casing. The conductive parts 48a and 50a may be, for example, metal plates attached to the outer surface of the time switch 48 and the light switch 50. The material of the conductive parts 48a and 50a is not limited to metal materials, but may be any conductive material. The conductive parts 48a and 50a are provided so as to be exposed to the outside, connected to terminals for writing software 54a to the storage unit 54 of the control unit 42, and used for connection to the writing device 60, and may be any conductive member that can input signals from the writing device 60 to the control unit 42.

[0065] As described above, in the lighting fixture 2 and lighting device 10 according to this embodiment, the time switch 48 and the brightness switch 50 are provided so as to be exposed to the outside and are connected to terminals for writing software 54a to the storage unit 54 of the control unit 42. They are also used for connecting to the writing device 60 and have conductive parts 48a and 50a that enable the writing of software 54a to the storage unit 54 by inputting signals from the writing device 60 to the control unit 42.

[0066] Thus, in the lighting fixture 2 and lighting device 10 according to this embodiment, conductive parts 48a and 50a are provided on the time switch 48 and the brightness switch 50 mounted on the control board 40, and the conductive parts 48a and 50a are used as electrical connection points with the writing device 60. Therefore, in the lighting fixture 2 and lighting device 10 according to this embodiment, software 54a can be written to the storage unit 54 after board mounting without directly mounting a dedicated component used only for connection with the writing device 60 on the control board 40.

[0067] In the lighting fixture 2 and lighting device 10 according to this embodiment, compared to the case where dedicated components used only for connection with the writing device 60, such as dedicated connectors and test pads, are directly provided on the control board 40, it is possible to suppress the conductive parts 48a and 50a from hindering the miniaturization and space saving of the control board 40.

[0068] Furthermore, in the lighting fixture 2 and lighting device 10 according to this embodiment, the conductive parts 48a and 50a are at least a part of the outer casing of the time switch 48 and the light switch 50. As a result, when the conductive parts 48a and 50a are used as electrical connection points with the writing device 60, there is no need to add new materials to the mounted components such as the time switch 48 and the light switch 50, thereby suppressing an increase in the number of parts and an increase in manufacturing costs. Moreover, by utilizing the outer casing portion originally provided on the mounted components as the conductive part, it is possible to suppress the conductive part from affecting the operation of the mounted components, compared to configurations such as attaching a metal plate as the conductive part.

[0069] Furthermore, in the lighting fixture 2 and lighting device 10 according to this embodiment, in the normal operating state in which the control unit 42 controls the lighting state of the light source unit 4, the switching element 56 is set to a first state to set the potential of the conductive parts 48a and 50a to a reference potential, and in the state in which software 54a is written to the storage unit 54, the switching element 56 is set to a second state to release the setting of the potential of the conductive parts 48a and 50a to a reference potential.

[0070] As a result, under normal operating conditions, at least one of the electromagnetic noise radiated from the time switch 48 and the light / dark switch 50 to the outside, and the electromagnetic noise flowing into the time switch 48 and the light / dark switch 50 from the outside can be suppressed. Furthermore, when writing software 54a to the storage unit 54, it is possible to suppress the signal input from the writing device 60 to the control unit 42 from flowing to the reference potential side.

[0071] Figure 3 is a block diagram schematically showing a modified example of the lighting fixture according to the embodiment. As shown in Figure 3, in the lighting fixture 2a, the memory unit 54 in the control unit 22a of the lighting device 10a is mounted on the control board 40 separately from the control unit 42. Components that are substantially the same in function and configuration as those in the above embodiment are denoted by the same reference numerals, and detailed explanations are omitted.

[0072] In this example, the memory unit 54 is mounted on the control board 40 separately from the control unit 42 and connected to the control unit 42. Like the control unit 42, the memory unit 54 is connected to the connector 52 and operates based on power supplied from the power supply unit 20 (power supply circuit 32) via the connectors 36, 52 and the wiring member 24.

[0073] In this example, the control unit 42 controls the lighting state of the light source unit 4 based on the software 54a stored in the memory unit 54, for example, by reading the software 54a from the memory unit 54. In this example, the memory unit 54 is, for example, an external memory. The control unit 42 is, for example, a microcontroller that operates by reading the software 54a from the external memory.

[0074] In this example, the storage unit 54 is configured to allow writing (rewriting) of the software 54a based on signals input from the outside. For this reason, in this example, the conductive parts 48a and 50a are provided so as to be exposed to the outside and are connected to terminals for writing the software 54a to the storage unit 54, and are also used to connect to the writing device 60. By inputting signals from the writing device 60 to the storage unit 54, the software 54a can be written to the storage unit 54.

[0075] In this example, for example, the memory unit 54 has a switching element (not shown) similar to the switching element 56 in the above embodiment, and the connector 52 is connected to the power supply unit 20. In the normal operating state where the lighting state of the light source unit 4 is controlled, the switching element is set to the first state to set the potential of the conductive parts 48a and 50a to the reference potential. When the connector 52 is connected to the writing device 60 and software 54a is written to the memory unit 54, the switching element is set to the second state to release the setting of the potential of the conductive parts 48a and 50a to the reference potential. As a result, similar to the above embodiment, in the normal operating state, the conductive parts 48a and 50a can be used as shielding against electromagnetic noise, and in the state where software 54a is written, it is possible to suppress the signal input from the writing device 60 to the control unit 42 from flowing to the reference potential side.

[0076] Thus, the memory unit 54 is not limited to an internal memory unit provided within the control unit 42, but may also be an external memory unit mounted on the control board 40 separately from the control unit 42 and connected to the control unit 42.

[0077] In the above embodiment, a lighting device 10 (lighting device 10a) is shown, which has a power supply unit 20 and a control unit 22 (control unit 22a). In other words, lighting devices 10 and 10a have two boards, a power supply board 30 and a control board 40. The configuration of the lighting device is not limited to this, and for example, the configuration of the power supply unit 20 and the configuration of the control unit 22 (control unit 22a) may be mounted on a single board.

[0078] The configuration of the lighting device is not limited to the above, and may include at least a circuit board, a control unit, and mounted components, wherein the mounted components may have any configuration having conductive parts.

[0079] In the above embodiment, when writing software 54a to the storage unit 54, power is supplied from the writing device 60 to the control unit 42 via the connector 52 by connecting the connector 52 to the writing device 60. Power is not limited to this, and power may also be supplied from the power supply unit 20 (power supply circuit 32) even when writing software 54a to the storage unit 54.

[0080] Furthermore, in the above embodiment, a time switch 48 and a light / dark switch 50 are shown as examples of mounted components. The mounted components that have conductive parts are not limited to these, and may also be, for example, a motion sensor 44 or an illuminance sensor 46. For example, in a configuration in which the components of the power supply unit 20 and the components of the control unit 22 (control unit 22a) are mounted on a single circuit board, the mounted components that have conductive parts may be components that make up the power supply unit 20. The mounted components that have conductive parts are not limited to the above, and may be any components mounted on the circuit board.

[0081] This embodiment includes the following aspects. (Note 1) A lighting device that is connected to a light source and a power supply, and lights up the light source by supplying a predetermined amount of power to the light source based on the power supplied from the power supply, circuit board and The circuit board is mounted on a storage unit that stores software, controls the lighting state of the light source based on the software stored in the storage unit, and enables writing the software to the storage unit based on signals input from an external source. The mounted components on the aforementioned substrate, Equipped with, The aforementioned mounted component has a conductive part, The conductive portion is provided so as to be exposed to the outside, is connected to a terminal of the control unit for writing the software to the storage unit, and is used to connect to an external writing device, and the lighting device enables the writing of the software to the storage unit by inputting a signal from the writing device to the control unit.

[0082] (Note 2) The lighting device according to Appendix 1, wherein the conductive part is at least a part of the outer casing of the mounted component.

[0083] (Note 3) The control unit has a switching element, The switching element is connected to the conductive part and switches between a first state in which the potential of the conductive part is set to a reference potential and a second state in which the setting of the potential of the conductive part to the reference potential is released. The lighting device as described in Appendix 2, wherein the control unit, in a normal operating state for controlling the lighting state of the light source, sets the switching element to a first state to set the potential of the conductive part to a reference potential, and in a state for writing the software to the storage unit, sets the switching element to a second state to release the setting of the potential of the conductive part to a reference potential.

[0084] (Note 4) A power supply unit connected to the aforementioned power supply, which converts the power supplied from the aforementioned power supply into power corresponding to the control unit, A connector mounted on the aforementioned circuit board, detachably connected to the power supply unit, and connected to the control unit, Furthermore, The lighting device according to any one of the appendices 1 to 3, wherein the control unit operates based on power supplied from the power supply unit via the connector in a normal operating state for controlling the lighting state of the light source unit, and operates based on power supplied from the writing device via the connector when the software is written to the storage unit by connecting the connector to the writing device.

[0085] (Note 5) A lighting device that is connected to a light source and a power supply, and lights up the light source by supplying a predetermined amount of power to the light source based on the power supplied from the power supply, circuit board and A storage unit mounted on the aforementioned circuit board stores software and enables the writing of the software based on signals input from an external source, A control unit is mounted on the substrate, connected to the memory unit, and controls the lighting state of the light source unit based on the software stored in the memory unit. The mounted components on the aforementioned substrate, Equipped with, The aforementioned mounted component has a conductive part, The conductive portion is provided so as to be exposed to the outside, is connected to a terminal for writing the software to the storage unit, and is used to connect to an external writing device, and a lighting device that enables writing the software to the storage unit by inputting a signal from the writing device to the storage unit.

[0086] (Note 6) Light source section, A lighting device as described in any one of the appendices 1 to 5, Equipped with lighting fixtures.

[0087] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0088] 2, 2a…Lighting fixture, 4…Light source unit, 10, 10a…Lighting device, 20…Power supply unit, 22, 22a…Control unit, 24…Wiring components, 30…Power supply board, 32…Power supply circuit, 34…Switching circuit, 36…Connector, 40…Control board, 42…Control unit, 44…Motion sensor, 46…Illuminance sensor, 48…Time switch, 48a…Conductive part, 50…Light / dark switch, 50a…Conductive part, 52…Connector, 54…Storage unit, 54a…Software, 56…Switching element, 60…Writing device, PS…Power supply

Claims

1. A lighting device that is connected to a light source and a power supply, and lights up the light source by supplying a predetermined amount of power to the light source based on the power supplied from the power supply, circuit board and The circuit board is mounted on a storage unit that stores software, controls the lighting state of the light source based on the software stored in the storage unit, and enables writing the software to the storage unit based on signals input from an external source. The mounted components on the aforementioned substrate, Equipped with, The aforementioned mounted component has a conductive part, The conductive portion is provided so as to be exposed to the outside, is connected to a terminal of the control unit for writing the software to the storage unit, and is used to connect to an external writing device, and the lighting device enables the writing of the software to the storage unit by inputting a signal from the writing device to the control unit.

2. The lighting device according to claim 1, wherein the conductive part is at least a part of the outer casing of the mounted component.

3. The control unit has a switching element, The switching element is connected to the conductive part and switches between a first state in which the potential of the conductive part is set to a reference potential and a second state in which the setting of the potential of the conductive part to the reference potential is released. The lighting device according to claim 2, wherein the control unit, in a normal operating state for controlling the lighting state of the light source, sets the switching element to a first state to set the potential of the conductive part to a reference potential, and in a state for writing the software to the storage unit, sets the switching element to a second state to release the setting of the potential of the conductive part to a reference potential.

4. A power supply unit connected to the aforementioned power supply, which converts the power supplied from the aforementioned power supply into power corresponding to the control unit, A connector mounted on the aforementioned circuit board, detachably connected to the power supply unit, and connected to the control unit, Furthermore, The lighting device according to claim 1, wherein the control unit operates based on power supplied from the power supply unit via the connector in a normal operating state for controlling the lighting state of the light source unit, and operates based on power supplied from the writing device via the connector when the software is written to the storage unit by connecting the connector to the writing device.

5. A lighting device that is connected to a light source and a power supply, and lights up the light source by supplying a predetermined amount of power to the light source based on the power supplied from the power supply, circuit board and A storage unit mounted on the aforementioned circuit board stores software and enables the writing of the software based on signals input from an external source, A control unit is mounted on the substrate, connected to the memory unit, and controls the lighting state of the light source unit based on the software stored in the memory unit. The mounted components on the aforementioned substrate, Equipped with, The aforementioned mounted component has a conductive part, The conductive portion is provided so as to be exposed to the outside, is connected to a terminal for writing the software to the storage unit, and is used to connect to an external writing device, and a lighting device that enables writing the software to the storage unit by inputting a signal from the writing device to the storage unit.

6. Light source section, A lighting device according to any one of claims 1 to 5, Equipped with lighting fixtures.

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