CELL UNIT, TRANSPORT VEHICLE AND LIGHTING CONTROL METHOD

Abstract

Cell unit (100, 100a, 100b, 100c) comprising the following: Side walls, a ceiling (12) and a floor (13) that form a cell, a toilet bowl (20) located in the cell, a first lighting device (31) which emits light to illuminate an interior of the cell, wherein the first lighting device (31) is arranged on the ceiling (12) or one of the side walls, a second lighting device (32, 132a, 132b, 232, 332a, 332b) emitting light to illuminate a floor area of ​​the cell, the floor area being part of the floor (13), wherein the second lighting device (32, 132a, 132b, 232, 332a, 332b) is arranged in the cell at a position lower than an upper end of the toilet bowl (20), a sensor (40) that detects brightness outside the cell, and a control unit (50) that (i) causes the second lighting device to emit light having a first color temperature lower than the color temperature of the light emitted by the first lighting device (31) when the brightness detected by the sensor (40) is a predetermined brightness or less, and (ii) causes the second lighting device to emit light having a second color temperature higher than the first color temperature when the brightness detected by the sensor (40) is greater than the predetermined brightness.

Description

[Technical field]

[0001] The present invention relates to the lighting control of a cell unit, which is provided, for example, in a transport vehicle. [General state of the art]

[0002] A lighting device for use in an aircraft is conventionally known. JP 2005-537613 A discloses a system that illuminates the interior of an aircraft with white and non-white light.

[0003] JP 2001-275891 A discloses a toilet facility with control, sensor and wiring for a lighting system that responds to user input or sensor data.

[0004] US 2018 / 0116470 A1 discloses a bathroom module with a shower area, toilet area and personal care area separated by walls, with plumbing lines running inside the walls to supply water to the shower head, valves, toilet and sink.

[0005] CN 101449946 A discloses a washing device with two lighting devices, a sensor and a remote control, in which different lighting is activated depending on the open state of the toilet chair.

[0006] JP 2007-117238 A discloses a toilet bowl system with flat LED light sources in the base area, controlled via a body detection sensor.

[0007] US 2014 / 0022775 A1 discloses a toilet night light with a moisture-resistant cover, automatic light sensor switch and manual override function.

[0008] US 2004 / 0090787 A1 discloses methods and systems for illuminating environments with white and colored light and controlling color temperature, which respond programmatically to inputs. [Brief description of the invention][Technical problem]

[0009] During a long-haul flight, an aircraft may provide a time window during which the cabin lights are dimmed to allow passengers to sleep. If a passenger, still drowsy, goes to the toilet while the cabin lights are dimmed, the light in the toilet may fully awaken them.

[0010] The present invention provides a cell unit, a transport vehicle, and a lighting control method that can prevent a user from being unnecessarily fully awakened. [Solution to the problem]

[0011] A cell unit according to one aspect of the present invention comprises side walls, a ceiling, and a floor forming a cell; a toilet bowl arranged in the cell; a first lighting device emitting light to illuminate an interior of the cell, wherein the first lighting device is arranged on the ceiling or one of the side walls; a second lighting device emitting light to illuminate a floor area of ​​the cell, wherein the floor area is a part of the floor; wherein the second lighting device is arranged in the cell at a position lower than an upper end of the toilet bowl; a sensor detecting brightness outside the cell; and a control device that (i) causes the second lighting device to emit light having a first color temperature when the brightness detected by the sensor is a predetermined brightness or less.(ii) causes the second lighting device to emit light having a second color temperature higher than the first color temperature, when the brightness detected by the sensor is greater than the predetermined brightness.

[0012] A transport vehicle according to one aspect of the present invention includes the cell unit.

[0013] A lighting control method according to one aspect of the present invention is a method for controlling the lighting in a cell unit comprising: side walls, a ceiling, and a floor forming a cell; a toilet bowl arranged in the cell; a first lighting device emitting light to illuminate an interior of the cell, wherein the first lighting device is arranged on the ceiling or one of the side walls; a second lighting device emitting light to illuminate a floor area of ​​the cell, wherein the floor area is a part of the floor; the second lighting device being arranged in the cell at a position lower than the upper end of the toilet bowl; the method comprising: sensing a brightness level outside the cell; and causing the lighting device to be switched off when the sensed brightness level is a predetermined brightness or lower.that the second lighting device emits light that has a first color temperature lower than the color temperature of the light emitted by the first lighting device, and that, if the recorded brightness is greater than the predetermined brightness, the second lighting device emits light that has a second color temperature higher than the first color temperature. [Advantageous effects of the invention]

[0014] According to the cell unit, the transport vehicle and the lighting control method of the present invention, it is possible to prevent a user from being unnecessarily fully awakened. [Brief description of the drawings] Fig. 1A is a diagram illustrating the internal structure of a cell unit according to one embodiment, viewed from above; Fig. 1B is a diagram illustrating the internal structure of the cell unit according to the embodiment, as seen from the side; Fig. Figure 2 is a block diagram of a functional configuration of the cell unit according to the embodiment; Fig. 3 is a flowchart of the light emission control for switching between lighting modes according to a brightness outside the cell; Fig. 4A is a schematic view of a lighting control in non-wake mode; Fig. 4B is a schematic view of a lighting control in wake-up mode; Fig. Figure 5 is a diagram illustrating the effects achieved by controlling a color temperature; Fig. Figure 6 is a scheme illustrating the control of the dimming of light emitted by a lighting device over a predetermined time; Fig. Figure 7 is a flowchart of the lighting control in response to a door being locked; Fig. 8 is a flowchart of the control of ultraviolet radiation emission; Fig. 9A is a diagram illustrating the internal structure of a cell unit according to variation 1, viewed from above; Fig. 9B is a diagram illustrating the internal structure of the cell unit according to variation 1, seen from the side; Fig. Figure 10A is a diagram illustrating the internal structure of a cell unit according to variation 2, viewed from above; Fig. Figure 10B is a diagram illustrating the internal structure of the cell unit according to variation 2, seen from the side; Fig. Figure 11A is a diagram illustrating the internal structure of a cell unit according to variation 3, viewed from above; Fig. Figure 11B is a diagram illustrating the internal structure of the cell unit according to variation 3, viewed from the side; and Fig. 12 is an exterior view of an airplane. [Description of embodiments]

[0015] The following describes embodiments of the present invention with reference to the accompanying drawings. The embodiments described below are, in each case, a general and specific illustration. The values, shapes, materials, components, and arrangement and connection between the components, steps, and sequence of steps shown in the following embodiments are only examples and are not intended to limit the present invention. Among the components in the embodiments, those not specified in any of the independent claims that define the most general part of the inventive concept of the present invention are described as components at the discretion of the author.

[0016] The figures are schematic views and do not necessarily illustrate the present invention precisely. In the figures, the reference numeral is used to refer to essentially the same configuration, and duplicate descriptions may be omitted or simplified. Design [Configuration]

[0017] Initially, a configuration of a cell unit according to an embodiment of the present invention is described. Fig. Figure 1A is a diagram illustrating the internal structure of the cell unit according to the embodiment, as seen from above. Fig. Figure 1B is a diagram illustrating the internal structure of the cell unit according to the embodiment, as seen from the side. Fig. Figure 2 is a block diagram of a functional configuration of the cell unit according to the embodiment.

[0018] As in Fig. 1A, Fig. 1B and Fig. Figure 2 illustrates that, according to the embodiment, cell unit 100 is a toilet unit located in a transport vehicle, such as an aircraft. Cell unit 100 is typically located inside the vehicle. For example, cell unit 100 can be located inside a building.

[0019] The cell unit 100 includes side walls 11, a ceiling 12 and a floor 13, which form a cell, and a toilet bowl 20, a first lighting device 31, a second lighting device 32, a third lighting device 33, a sensor 40, a control unit 50, a door 60, a door detector 65 and a basin 70.

[0020] The side walls 11, the ceiling 12, and the floor 13 are rectangular panel elements. The side walls 11, the ceiling 12, and the floor 13 form the cell in a generally rectangular parallelepiped shape. Specifically, the cell is a space enclosed by the wall surfaces of the side walls 11, a ceiling surface of the ceiling 12, and a floor surface of the floor 13.

[0021] The side walls 11, the ceiling 12 and the floor 13 are, for example, made of resin, such as polyethylene resin, or fiber reinforced plastic (FRP), but they can be formed from metal and are not particularly limited.

[0022] Door 60 allows a user to enter and exit the cell and can be locked by the user from inside the cell. Door 60 is a rectangular security element. It is typically made of a resin, such as polyethylene resin or fiber-reinforced composite (FRP). However, Door 60 can also be made of metal and is not subject to any particular restrictions.

[0023] The door detector 65 is an example of a lock detector and detects whether the door 60 is locked or not. The door detector 65 includes, for example, a sensor that structurally or optically detects whether a locking mechanism for the door 60 is functioning. Furthermore, the door detector outputs, for example, an initial digital signal as a detection result. This initial digital signal is high when the door 60 is locked and low when it is unlocked. It should be noted that the logic of the initial digital signal can be reversed.

[0024] Furthermore, the door detector 65 is also an example of an opening and closing detector and detects the opening and closing of the door 60. The door detector 65 includes, for example, a door sensor that detects the opening and closing of the door 60 using infrared. However, the door detector 65 can also detect the opening and closing of the door 60 using a different sensor. For example, the door detector 65 outputs a second digital signal as a detection result. This second digital signal is high when the door 60 is open and low when the door 60 is closed. It should be noted that the logic of the second digital signal can be reversed.

[0025] The door detector 65, for example, is located on the side wall 11 (the outside of the side wall 11), but is not particularly limited.

[0026] The toilet bowl 20 is a sanitary fixture for the user to use the toilet. The toilet bowl 20 is located in the cell. The toilet bowl 20 can be a Western-style toilet or a squat toilet. The washing system of the toilet bowl 20 can be a flushing system (circulating system) or a vacuum system. A specific embodiment of the toilet bowl 20 is not particularly limited.

[0027] The first lighting device 31 is arranged on the side wall 11 or the ceiling 12. The first lighting device 31 is a so-called main light (direct light) and illuminates the entire interior of the cell by emitting light. The first lighting device 31 is, for example, a ceiling spotlight embedded in the ceiling 12. However, the first lighting device 31 can be any other lighting device, such as a spotlight, which can be attached to a ceiling surface that is part (lower surface) of the ceiling 12 or to an interior wall surface that is part of the side walls 11. The first lighting device 31 can also be a linear light fixture if it is arranged on the side wall 11 (interior wall surface). The light emission of the first lighting device 31 is controlled by the control unit 50, independently of the second lighting device 32.The first lighting device 31 includes in detail a light spotlight 31a.

[0028] The 31a light emitter, for example, is a light-emitting module that uses a light-emitting diode (LED) as its light-emitting element. The 31a light emitter emits white light. The intensity of the light emitted by the 31a light emitter can be controlled by the 50 control unit (brightness control).

[0029] The color temperature of the light emitted by the light source 31a is, for example, 5000 K, but is not particularly limited. In the present embodiment, the light source 31a is a light-emitting module whose color control is not enabled; alternatively, the light source 31a can be a light-emitting module whose color control is enabled.

[0030] The second lighting device 32 is located in the cell at a position lower than the top of the toilet bowl 20. It should be noted that, if the toilet bowl 20 has a lid, the top of the lid is the upper end when the lid is open. The second lighting device 32 is a secondary (indirect) lighting device and illuminates a floor area of ​​the cell by emitting light, the floor area being a part (the upper surface) of the floor 13. The light emission of the second lighting device 32 is controlled by the control unit 50 independently of the first lighting device 31. Specifically, the second lighting device 32 includes a light emitter 32a and a UV emitter 32b.

[0031] The 32a light source, for example, is a light-emitting module that uses an LED as its light-emitting element. The 32a light source emits white light. The 32a light source is a module that includes light sources emitting light with different color temperatures, and allows for dimming and color control (color temperature control). It should be noted that the 32a light source can emit light with a first color temperature and light with a second color temperature, as described below, and that stepless color control is not essential.

[0032] The UV (ultraviolet) emitter 32b emits ultraviolet radiation. The UV emitter 32b is configured, for example, as an ultraviolet LED or an ultraviolet lamp. Ultraviolet radiation is used, for example, to disinfect (sterilize) the inside of a cell. It should be noted that the UV emitter 32b can be implemented in a separate radiation device from the second lighting device 32.

[0033] The third lighting device 33 is a work lighting device located above the pool 70 and illuminates a user of the pool 70 by emitting light. The light emission of the third lighting device 33 is controlled independently of the first lighting device 31 and the second lighting device 32. This allows the user to freely use the third lighting device 33 regardless of the lighting states of the first lighting device 31 and the second lighting device 32. The light emission of the third lighting device 33 is controlled, for example, by a control unit (not shown) enclosed within the third lighting device 33, but can also be controlled by the control unit 50.

[0034] The third lighting device 33 can have a color rendering index (CRI) higher than that of the first lighting device 31. This can provide the user of the basin 70 with high color rendering. The third lighting device 33, which has a higher color rendering index, is suitable for a user applying makeup using the basin 70. The third lighting device specifically includes a light source 33a and a receiver 33b.

[0035] The 33a light source, for example, is a light-emitting module that uses an LED as its light-emitting element. The 33a light source emits white light. The 33a light source includes light sources that emit light with different color temperatures and is configured to emit light in (at least two) lighting modes.

[0036] The receiver 33b receives, from a user, an instruction to switch the third lighting device 33 on and off and to select from among the lighting modes of the third lighting device 33. Specifically, the receiver 33b is a user interface, such as a touch panel or a push button. The receiver 33b allows the user to select a lighting mode of the third lighting device 33.

[0037] The lighting modes include, for example, a first lighting mode and a second lighting mode. In the first lighting mode, the light color is optimized for applying makeup for business purposes. In the second lighting mode, the light color is optimized for applying makeup for personal purposes. This allows the user of Basin 70 to benefit from makeup application depending on the setting.

[0038] The Basin 70 is a washbasin used, for example, to apply makeup and wash one's hands. The Basin 70 includes a sink and a mirror.

[0039] Sensor 40 detects brightness outside the cell (cell unit 100). Specifically, sensor 40 detects the brightness outside the cell, which is also the brightness inside a transport vehicle (the cabin if the transport vehicle is an aircraft). In other words, sensor 40 detects brightness inside (a building or transport vehicle) instead of outside.

[0040] Sensor 40, for example, includes an imaging unit that incorporates a complementary metal oxide semiconductor (CMOS) sensor or an RGB sensor, and detects brightness by capturing an image outside the cell. Sensor 40 can also include an illuminance sensor or the like and detect brightness through the illuminance sensor. Sensor 40 is, for example, located on the ceiling 12, but its placement is not particularly restricted. Sensor 40 can be located at a distance from the cell.

[0041] The sensor 40 can also indirectly detect the brightness outside the cell instead of directly detecting it. For example, the sensor 40 can detect (monitor) a pulse-width modulation (PWM) signal that controls the brightness of a lighting device outside the cell, or a current value, or the like, through the lighting device outside the cell, and indirectly detect the brightness outside the cell based on the detected information.

[0042] Furthermore, sensor 40 outputs, for example, a current or voltage corresponding to the measured brightness as a result of the measurement. In addition to the sensors mentioned above, sensor 40 can be configured with, for example, a processor, a microcomputer, or a dedicated circuit.

[0043] The control unit 50 is a control device that controls the light emission of the first lighting device 31 and the second lighting device 32. The control unit 50 can also control the light emission of the third lighting device 33. The control unit 50 is, for example, arranged on the ceiling 12, but its arrangement is not particularly restricted.

[0044] The control unit 50 is implemented, for example, as a processor, a microcomputer, or a dedicated integrated circuit. The control unit 50 can also be implemented as a combination of a processor, a microcomputer, and a dedicated integrated circuit. [Common problems with lighting control]

[0045] Next, common problems with lighting control will be described. For example, a lighting control system is considered that switches between lighting modes based on whether a user is in the cell. The control unit 50 detects that a person is in the cell if, for example, the door detector 65 detects that the door 60 is locked. In this case, the control unit 50 causes the first lighting device 31 and the second lighting device 32 to emit bright light (fully on).

[0046] On the other hand, the control unit 50 detects that no one is present in the cell if, for example, the door detector 65 detects that the door 60 is not locked. In this case, the control unit 50 causes the first lighting device 31 to dim and switches off the second lighting device 32.

[0047] Common problems with the lighting control are as follows. For example, if the interior of the cell is bright and it is relatively dim outside, it takes time for a user exiting the cell to adjust to the darker environment outside. In this case, the user has to move around while perceiving the environment as dark. Consequently, there is a risk of the user falling or colliding with something. Furthermore, if it is relatively dim outside the cell, the user entering the cell and being exposed to bright light may be unnecessarily fully awakened. [Details of the lighting control]

[0048] Consequently, the control unit 50 performs a control (lighting control) of switching between lighting modes according to a brightness outside the cell. Fig. Figure 3 is a flowchart of the lighting control.

[0049] Sensor 40 detects an ambient light level outside the cell (S11). Control unit 50 determines whether the brightness detected by sensor 40 is higher than a predetermined brightness level (S12). Specifically, control unit 50 determines whether a voltage or current output from sensor 40 indicates that the brightness detected by sensor 40 is higher than the predetermined brightness level. Sensor 40 can perform such a determination. It should be noted that the predetermined brightness level can be determined empirically and experimentally as a threshold for switching between lighting modes, if necessary.

[0050] In step S12, if the brightness detected by sensor 40 is found to be the predetermined brightness or lower (No in S12), it is estimated that the outside of the cell is dimmed to encourage the user to sleep. Consequently, the control unit 50 performs a non-wake mode lighting control to reduce the user's alertness. Fig. 4A is a schematic view of the non-wake mode lighting control.

[0051] As in Fig. Figure 4A illustrates that, in the non-wake mode lighting control (hereinafter also referred to simply as a non-wake mode), the control unit 50 causes the first lighting device 31 to emit a more dim light than in the wake mode lighting control (hereinafter also referred to simply as a wake mode) (S13). In other words, if the brightness detected by the sensor 40 is the predetermined brightness or less, the control unit 50 causes the first lighting device 31 to emit a more dim light than if the brightness detected by the sensor 40 is greater than the predetermined brightness.

[0052] The control unit 50 then causes the second lighting device 32 to emit light with a first color temperature lower than the color temperature of the light emitted by the first lighting device 31 (S14). The first color temperature is, for example, 3000 K, but can be any color temperature lower than the color temperature of the light emitted by the first lighting device 31.

[0053] It should be noted that if the color produced by the first lighting device 31 is controllable, the first color temperature may be lower than the color temperature of the light emitted by the first lighting device 31 during the non-wake mode. Furthermore, in such a case, the first color temperature may be lower than a defined color temperature of the first lighting device 31. For example, if the color produced by the first lighting device 31 is controlled within a color temperature range of 3000 K or more and 5000 K or less, the defined color temperature may be 4000 K, which is an intermediate value, 5000 K, which is a maximum value, or 3000 K, which is a minimum value.

[0054] On the other hand, if the control unit 50 determines that the brightness detected by sensor 40 is higher than the predetermined brightness in step S12 (Yes in S12), it considers that there is no need to prevent an increase in user alertness, but rather that user alertness can be increased. For this reason, the control unit 50 performs the wake-up mode lighting control to prevent a decrease in user alertness. Fig. Figure 4B is a schematic view of the lighting control in wake-up mode.

[0055] As in Fig. Figure 4B illustrates how, in wake-up mode, the control unit 50 causes the first lighting device 31 to emit brighter light than in non-wake-up mode (S15). In other words, the control unit 50 increases the light output of the first lighting device 31 more than in non-wake-up mode. The control unit 50 then causes the second lighting device 32 to emit light with a second color temperature higher than the first (S16). The second color temperature is, for example, 5000 K, but can be any color temperature higher than the first. [Effects]

[0056] The color temperature of the light emitted by the second lighting device 32 in non-wake mode is lower than the color temperature of the light emitted by the first lighting device 31 in wake mode. The advantageous effects achieved by such color temperature control will now be described. Fig. Figure 5 is a diagram illustrating the effects achieved by controlling a color temperature.

[0057] Fig. Figure 5 shows diagrams of mean alertness levels of eight test subjects, measured before and after entering the cell. Fig. In addition to the mean values, maximum and minimum values ​​are also displayed. Fig. In Figure 5, alertness is displayed on the vertical axis, and time is displayed on the horizontal axis. The alertness of the test subjects is measured when the color temperature of the lighting in the cell is 3000 K and 5000 K. The alertness of the test subjects is also measured when the illuminance of the lighting in the cell is 30 lx and 150 lx. It should be noted that alertness depends on the center frequency of each test subject's brainwaves; the higher the center frequency of the brainwaves, the higher the alertness.

[0058] Fig. Figure 5 indicates that color temperature has a greater impact on alertness than illuminance. Specifically, alertness tends to decrease more at a color temperature of 3000 K than at a color temperature of 5000 K.

[0059] The user frequently looks down when using the toilet bowl 20 in the cubicle. For this reason, the control unit 50 causes the second lighting device 32 to emit light with a first color temperature lower than the color temperature of the light emitted by the first lighting device 31 in non-wake mode, thereby effectively reducing the user's alertness.

[0060] On the other hand, there is no need to prevent an increase in alertness in wake-up mode; instead, the user can be woken up more effectively. Consequently, in wake-up mode, the control unit 50 sets the color temperature of the light emitted by the second lighting device 32 to the second color temperature, which is higher than in non-wake-up mode. This prevents a decrease in the user's alertness.

[0061] As described above, in non-wake mode, the control unit 50 causes the second lighting device 32 to emit light with a color temperature lower than that emitted by the first lighting device 31. In wake mode, the control unit 50 causes the second lighting device 32 to emit light with a color temperature higher than that emitted by the first.

[0062] This allows the Cell Unit 100 to prevent the user from being unnecessarily fully awakened. For example, if the Cell Unit 100 is deployed on an airplane, the user can enjoy a good night's sleep even after returning to the cabin from the unit, thus enabling the user to make the most of their flight.

[0063] In non-wake mode, the control unit 50 specifically causes the first lighting device 31 to emit light that is more subdued than in wake mode.

[0064] Accordingly, the first lighting device 31 also emits subdued light when it is dark outside the cell, thus enabling the user moving out of the cell to easily adapt to the dark environment outside. Consequently, the risk of the user falling or causing a collision is reduced. In other words, safety is improved.

[0065] Furthermore, in non-wake mode (in which the second lighting device 32 emits light with the first color temperature), the control unit 50 can further dim the light emitted by at least one of the first lighting device 31 and the second lighting device 32 for a predetermined time. In other words, in non-wake mode, the control unit 50 can further reduce the light output of at least one of the first lighting device 31 and the second lighting device 32 for a predetermined time. Fig. Figure 6 is a scheme illustrating the control of the dimming of light emitted by the lighting device over a predetermined time.

[0066] Fig. Figure 6 shows changes in the brightness of the light emitted by the first lighting device 31 or the second lighting device 32 over time, starting at the beginning of the non-wake mode, which is indicated by 0.

[0067] If the interior of the cubicle is too dark from the very beginning of the non-wake mode, there are risks such as the user colliding with toilet bowl 20 or bowl 70. Conversely, if the interior of the cubicle is too bright from the very beginning of the non-wake mode, it makes it difficult for the user to adapt to the dark environment outside the cubicle, as mentioned above.

[0068] Consequently, after the start of the non-wake mode, the control unit 50 causes the light emitted by one of the first lighting devices 31 and the second lighting device 32 to be dimmed over a predetermined time T, as described in Fig. Figure 6 illustrates this. The predetermined time T is, for example, five seconds or more and less than one minute, but is not particularly limited. This ensures brightness inside the cell during the early part of the non-wake mode, thus improving security, and dims the interior of the cell during the final part of the non-wake mode, allowing the user to easily adapt to the dark environment outside the cell.

[0069] It should be noted that the control unit 50 can dim either the light emitted by the first lighting device 31 for a predetermined time or the light emitted by the second lighting device 32 for a predetermined time. Alternatively, the control unit 50 can dim both the light emitted by the first lighting device 31 and the light emitted by the second lighting device 32 for a predetermined time.

[0070] If the control unit 50 dims both the light emitted by the first lighting device 31 and the light emitted by the second lighting device 32 over a predetermined time, the control unit 50 can begin dimming the light emitted by the first lighting device 31 and the light emitted by the second lighting device 32 simultaneously, or it can begin dimming one of the light emitted by the first lighting device 31 and the light emitted by the second lighting device 32 earlier in time than the other. The timing for the start of the dimming is not particularly limited. For example, the dimming can begin simultaneously with the start of the non-wake-up mode lighting control.

[0071] Furthermore, the light emitted by the first lighting device 31 and the light emitted by the second lighting device 32 can, for example, be dimmed linearly, as in the continuous line in Fig. 6 or can be dimmed following a curve corresponding to a response of the user's photoreceptor, as shown by the dashed line in Fig. 6 displayed. [Another control example 1]

[0072] The following describes a different control system, which differs from the lighting control system described above.

[0073] The control unit 50 can, based on a detection by the door detector 65, determine that the door 60 is locked and cause at least one of the first lighting device 31 and the second lighting device 32 to emit brighter light than before the door 60 is locked. Fig. Figure 7 is a flowchart of such a lighting control depending on the locking of the door 60.

[0074] Initially, the door detector 65 detects the state of the door 60 (S21). As described above, the door detector 65 specifically detects whether the door 60 is locked and, as the detection, outputs the first digital signal, the logic of which depends on whether the door 60 is locked.

[0075] Based on the detection by the door detector 65, the control unit 50 determines whether the door 60 is locked (S22). If the control unit 50 determines that the door 60 is locked (Yes in S22), it causes at least one of the first lighting device 31 and the second lighting device 32 to emit brighter light than before the door 60 is locked (S23). If the door 60 is not locked (No in S22), the detection of the door 60's status continues.

[0076] It should be noted that the control unit 50 can cause only the first lighting device 31 to emit bright light, or it can cause only the second lighting device 32 to emit bright light. Alternatively, the control unit 50 can cause both the first lighting device 31 and the second lighting device 32 to emit bright light.

[0077] A period during which the door 60 is not locked is considered a period during which no user is in the cell, a period during which there is no need to illuminate the interior of the cell with bright light. According to the lighting control, the control unit 50 can, depending on whether the door 60 is locked, dim or switch off the light emitted by the first lighting device 31 and the second lighting device 32 during such a period. In other words, energy savings for cell unit 100 are achieved by reducing unnecessary light emission from the first lighting device 31 and the second lighting device 32. [Another control example 2]

[0078] The control unit 50 can cause the UV emitter 32b to emit ultraviolet radiation if the control unit 50, based on a detection by the door detector 65, determines that the door 60 is not locked after it is closed. Fig. Figure 8 is a flowchart of such radiation control of ultraviolet radiation.

[0079] Initially, the door detector 65 detects the state of door 60 (S31). As described above, the door detector 65 specifically detects whether door 60 is locked and, as a confirmation, outputs the first digital signal, the logic of which depends on whether door 60 is locked. The door detector 65 also outputs, as a confirmation, the second digital signal, the logic of which depends on whether door 60 is open or closed.

[0080] Based on the detection by the door detector 65, the control unit 50 determines whether the door 60 has remained unlocked for a predetermined period since it was closed (S32). If the control unit 50 determines that the predetermined period has elapsed and the door 60 has remained unlocked after being closed (Yes in S32), that is, if the control unit 50 determines that the door 60 is not locking after being closed, the control unit 50 causes the UV emitter 32b to emit ultraviolet radiation (S33).

[0081] On the other hand, if door 60 is locked after being closed, before the predetermined period has elapsed (No in S32), the above control is terminated. In other words, control unit 50 does not allow UV emitter 32b to emit ultraviolet radiation.

[0082] The UV lamp 32b emits ultraviolet radiation to disinfect (sterilize) the interior of the cell. However, since ultraviolet radiation is harmful, it is dangerous to allow the UV lamp 32b to emit ultraviolet radiation while the user is still inside the cell. Similarly, it is also dangerous to allow the UV lamp 32b to emit ultraviolet radiation while the door 60 is open.

[0083] Here is the case where it is detected that door 60 is closed but not locked, a case where it is estimated that door 60 is closed, and the user is absent from the cell (has left it). Since the control unit 50, in such a case, causes the UV emitter 32b to emit ultraviolet radiation, the interior of the cell can be safely disinfected. Furthermore, since the control unit 50 requires the predetermined period to elapse before emitting ultraviolet radiation, it prevents accidental emission of ultraviolet radiation while the user is inside the cell, thus further improving safety. [Variations in the arrangement of the second lighting device]

[0084] The arrangement of the second lighting device (the second lighting device 32) described in the embodiment above is given as an example and is not particularly limited. Variations of the arrangement of the second lighting device are described below. Fig. Figure 9A is a diagram illustrating the internal structure of a cell unit according to variation 1 of the embodiment, as seen from above. Fig. Figure 9B is a diagram illustrating the internal structure of the cell unit according to variation 1, as seen from the side.

[0085] The in Fig. 9A and Fig. The illustrated cell unit 100a in Figure 9B includes a second lighting device 132a and a second lighting device 132b. The second lighting device 132a and the second lighting device 132b are arranged on side walls 11 located on both sides of the toilet bowl 20 and are jointly controlled by the control unit 50, similar to the control described above with respect to the second lighting device 32. The second lighting device 132a and the second lighting device 132b are arranged such that they have the toilet bowl 20 between them in the horizontal direction. The second lighting device 132a and the second lighting device 132b are located in positions lower than the top of the toilet bowl 20.

[0086] Fig. Figure 10A is a diagram illustrating the internal structure of a cell unit according to variation 2 of the embodiment, as seen from above. Fig. Figure 10B is a diagram illustrating the internal structure of the cell unit according to variation 2, seen from the side.

[0087] The in Fig. 10A and Fig. Illustrated cell unit 100b includes a second lighting device 232 in an elongated shape. The second lighting device 232 is arranged on one of the side walls 11 located behind the toilet bowl 20, such that the longitudinal direction of the second lighting device 232 is along the horizontal direction. The second lighting device 232 is positioned lower than the upper end of the toilet bowl 20.

[0088] Fig. Figure 11A is a scheme illustrating the internal structure of a cell unit according to a variation 3 of the embodiment, as seen from above. Fig. Figure 11B is a diagram illustrating the internal structure of the cell unit according to variation 3, seen from the side.

[0089] The in Fig. 11A and Fig. The illustrated cell unit 100c (Figure 11B) includes a second lighting device 332a and a second lighting device 332b. The second lighting device 332a and the second lighting device 332b are arranged on one of the side walls 11, which is located behind the toilet bowl 20. The second lighting device 332a and the second lighting device 332b are arranged horizontally apart from each other and are again jointly controlled by the control unit 50, similar to the second lighting device 32 described above. The second lighting device 332a and the second lighting device 332b are arranged in positions lower than the top of the toilet bowl 20.

[0090] The cell unit 100a, the cell unit 100b and the cell unit 100c described above also prevent the user from being fully awakened by the control unit 50 performing the lighting control described above. [Summary]

[0091] As described above, the cell unit 100 includes the following: side walls 11, a ceiling 12, and a floor 13 forming a cell; a toilet bowl 20 arranged within the cell; and a first lighting device 31 that emits light to illuminate the interior of the cell, the first lighting device 31 being located on the ceiling 12 or one of the side walls 11. The cell unit 100 also includes a second lighting device 32 that emits light to illuminate a floor area of ​​the cell, the floor area being a part of the floor, the second lighting device 32 being located in the cell at a position lower than the upper end of the toilet bowl 20; a sensor 40 that detects brightness outside the cell; and a control unit 50.If the brightness detected by sensor 40 is a predetermined brightness or less, the control unit 50 causes the second lighting device 32 to emit light with a first color temperature lower than the color temperature of the light emitted by the first lighting device 31. If the brightness detected by sensor 40 is greater than the predetermined brightness, the control unit 50 causes the second lighting device 32 to emit light with a second color temperature higher than the first color temperature.

[0092] This allows the second lighting device to emit light 32, which has the first color temperature, thus reducing the user's alertness when it is dark outside cell 100, preventing the user from being unnecessarily fully awakened. If cell unit 100 is deployed, for example, in an aircraft, the user can continue to sleep soundly even after returning to the cabin from the cell, thus enabling the user to make the most of the flight.

[0093] Furthermore, if the brightness detected by sensor 40 is the predetermined brightness or less, the control unit 50 can also cause the first lighting device 31 to emit a more dim light than if the brightness detected by sensor 40 were greater than the predetermined brightness. In other words, the control unit 50 can also cause the first lighting device 31 to emit light with a first brightness level if the brightness detected by sensor 40 is the predetermined brightness or less, and cause the first lighting device 31 to emit light with a second brightness level, greater than the first brightness level, if the brightness detected by sensor 40 is greater than the predetermined brightness level.

[0094] This causes the first lighting device 31 to emit dim light when it is dark outside the cell, thus enabling the user moving out of the cell to easily adapt to the dark environment outside. Consequently, the risk of the user falling or causing a collision is reduced. In other words, safety is improved.

[0095] Furthermore, the cell unit 100 can also include a door 60 to allow a user to enter and exit the cell, the door 60 being locked by the user from inside the cell, and a door detector 65 that detects whether the door 60 is locked. The door detector 65 is an example of a lock detector. At that point, based on the detection by the door detector 65, the control unit can determine that the door 60 is locked and cause at least one of the first lighting device 31 and the second lighting device 32 to emit light that is brighter than before the door 60 is locked.

[0096] This reduces unnecessary light emission from the first lighting device 31 and the second lighting device 32 during a period when no one is expected to be in the cell, thereby achieving energy savings for the cell unit 100.

[0097] Furthermore, while causing the second lighting device 32 to emit light having the first color temperature, the control unit 50 can also cause the light emitted by at least one of the first lighting device 31 and the second lighting device 32 to be dimmed over a predetermined time.

[0098] Accordingly, brightness in the cell is ensured in the early part by the second lighting device emitting light of the first color temperature, thus improving safety, and the interior of the cell is dimmed in the final part, allowing the user to easily adapt to the dark environment outside the cell.

[0099] Furthermore, the cell unit 100 can also include a door detector 65, which detects the opening and closing of the door 60, and the second lighting device 32 can also include a UV emitter 32b, which emits ultraviolet radiation. The door detector 65 is an example of an opening and closing detector. At this point, the control unit 50 can also cause the UV emitter 32b to emit ultraviolet radiation if the control unit 50, based on a detection by the door detector 65, determines that the door 60 is not locked after it is closed.

[0100] This triggers the emission of ultraviolet radiation when it is determined that door 60 is closed without a user being present in the cell, thus safely disinfecting the interior of the cell.

[0101] Furthermore, the cell unit 100 can also include a basin 70 arranged in the cell and a third lighting device 33 which emits light to illuminate the user at the basin 70, wherein the emission of light by the third lighting device 33 is controlled independently of the first lighting device 31 and the second lighting device 32.

[0102] This allows the user to freely use the third lighting device 33, regardless of the lighting states of the first lighting device 31 and the second lighting device 32.

[0103] Furthermore, the third lighting device 33 can include a light emitter 33a configured to emit light in several lighting modes and a receiver 33b that receives a selection from among the several lighting modes.

[0104] This allows the user to select a lighting mode for the third lighting device 33.

[0105] Furthermore, the third lighting device 33 can have a higher color rendering property than the first lighting device 31.

[0106] This can provide the user of the Basin 70 with high color rendering.

[0107] Furthermore, the cell unit 100 can be arranged in a transport vehicle, and the sensor 40 can detect the brightness outside the cell, which is a brightness inside the transport vehicle.

[0108] This allows cell unit 100 to perform lighting control based on the brightness outside the cell, which is a brightness level inside the transport vehicle.

[0109] Furthermore, a lighting control method according to the above embodiment is a method for controlling the lighting in the cell unit 100. The lighting control method includes the following: sensing a brightness level outside the cell and causing the second lighting device 32 to emit light having a first color temperature lower than the color temperature of the light emitted by the first lighting device 31 when the sensing brightness level is a predetermined brightness or lower. The lighting control method also includes causing the second lighting device 32 to emit light having a second color temperature higher than the first color temperature when the sensing brightness level is greater than the predetermined brightness.The lighting control method is implemented, for example, by a control device or the like, which includes the sensor 40 and the control unit 50 (a processor).

[0110] This allows the second lighting device 32 to emit light with the first color temperature when it is dark outside cell 100, thus facilitating a reduction in the user's alertness and preventing the user from being unnecessarily fully awakened. For example, if cell unit 100 is deployed in an aircraft, the user can continue to sleep soundly even after returning to the cabin. Other embodiments

[0111] While the cell unit and the lighting control method according to the embodiment have been described above, the present invention is not limited to the embodiment described above.

[0112] For example, while the light source described in the embodiment above is configured with an LED, this is just one example. A fluorescent tube, a metal halide lamp, a sodium lamp, a halogen lamp, a xenon lamp, a neon tube, etc., can be used as the light source. Inorganic electroluminescence, organic electroluminescence, chemiluminescence, a semiconductor laser, etc., can also be used as the light source. Furthermore, the light source can emit light of a desired color, for example, by using a spectral filter. The light source can be configured in any way to a degree that allows for the necessary controls for lighting control (dimming control and color control).

[0113] Furthermore, general and specific aspects of the present invention can be implemented in a system, a method, an integrated circuit, a computer program, or a computer-readable recording medium, such as a CD-ROM, or any combination thereof. For example, the present invention can be implemented in the lighting control program, a program for causing a computer to execute the lighting control program, or in the control unit (the control device) according to the embodiments described above.

[0114] Furthermore, the present invention can be implemented in a transport vehicle comprising: the cell unit according to the embodiments described above and a transport body within which the cell unit is arranged. Examples of the transport vehicle include an aircraft, as shown in Fig. Figure 12 illustrates one. However, the transport vehicle can be any other means of transport, such as a train or a ship. Fig. 12 is an exterior view of an airplane.

[0115] Furthermore, all or some of the components in the above embodiments, such as the control unit, can be configured with dedicated hardware or can be implemented by executing a software program suitable for the component. Each component can be implemented by a program execution unit, such as a CPU or processor, which loads and executes the software program stored on a recording medium, such as a hard disk or semiconductor memory.

[0116] Furthermore, in the above embodiments, processing performed by one processing unit can be performed by another processing unit. The sequence of processes can be changed, or the processes can be executed in parallel.

[0117] In other cases, various modifications to the embodiments described above according to the present invention, which can be devised by a person skilled in the art, and embodiments which are implemented in any combination of the components and functions shown in the embodiments, are also included within the scope of the present invention without departing from the spirit of the present invention. [List of reference symbols] 11 Side wall 12 Ceiling 13 Floor 20 toilet bowls 31 first lighting device 32, 132a, 132b, 232, 332a, 332b second lighting device 32b UV lamp 33 third lighting device 33a spotlight 33b Recipient 40 Sensor 50 control unit 60 Door 65 Door detector 70 basins 100, 100a, 100b, 100c cell unit

Claims

[1] Cell unit (100, 100a, 100b, 100c) comprising the following: Side walls, a ceiling (12) and a floor (13) that form a cell, a toilet bowl (20) located in the cell, a first lighting device (31) which emits light to illuminate an interior of the cell, wherein the first lighting device (31) is arranged on the ceiling (12) or one of the side walls, a second lighting device (32, 132a, 132b, 232, 332a, 332b) emitting light to illuminate a floor area of ​​the cell, the floor area being part of the floor (13), wherein the second lighting device (32, 132a, 132b, 232, 332a, 332b) is arranged in the cell at a position lower than an upper end of the toilet bowl (20), a sensor (40) that detects brightness outside the cell, and a control unit (50) that (i) causes the second lighting device to emit light having a first color temperature lower than the color temperature of the light emitted by the first lighting device (31) when the brightness detected by the sensor (40) is a predetermined brightness or less, and (ii) causes the second lighting device to emit light having a second color temperature higher than the first color temperature when the brightness detected by the sensor (40) is greater than the predetermined brightness. [2] Cell unit (100, 100a, 100b, 100c) according to claim 1, wherein the control unit (50) further causes the first lighting device to emit light having a first brightness when the brightness detected by the sensor (40) is the predetermined brightness or less, and causes the first lighting device to emit light having a second brightness greater than the first brightness when the brightness detected by the sensor (40) is greater than the predetermined brightness. [3] Cell unit (100, 100a, 100b, 100c) according to claim 1 or 2, further comprising: a door (60) to allow a user to enter and leave the cell, the door (60) being locked from inside the cell by the user, and a door detector (65) that detects whether the door (60) is locked, wherein The control unit (50), based on the detection by the door detector (65), determines that the door (60) is locked and causes at least one of the first lighting device and the second lighting device to emit light that is brighter than before the door (60) is locked. [4] Cell unit (100, 100a, 100b, 100c) according to any one of claims 1 to 3, wherein while it causes the second lighting device (32, 132a, 132b, 232, 332a, 332b) to emit the light having the first color temperature, the control unit (50) further causes the light emitted by at least one of the first lighting device and the second lighting device to be dimmed over a predetermined time. [5] Cell unit (100, 100a, 100b, 100c) according to claim 3, further comprising: an opening and closing detector that detects the opening and closing of the door (60), wherein the second lighting device (32, 132a, 132b, 232, 332a, 332b) further includes a radiator emitting ultraviolet radiation, and the control unit (50) further causes the emitter to emit ultraviolet radiation when the control unit (50), based on a detection by the opening and closing detector and a detection by the locking detector, determines that the door (60) is not locked after it is closed. [6] Cell unit (100, 100a, 100b, 100c) according to any one of claims 1 to 5, further comprising: a basin (70) arranged in the cell, and include a third lighting device (33) which emits light to illuminate the user at the basin (70), wherein the emission of light by the third lighting device (33) is controlled independently of the first lighting device and the second lighting device. [7] Cell unit (100, 100a, 100b, 100c) according to claim 6, wherein the third lighting device (33) includes a light emitter (33a) configured to emit light in multiple lighting modes and a receiver (33b) receiving a selection from among the multiple lighting modes. [8] Cell unit (100, 100a, 100b, 100c) according to claim 6 or 7, wherein the third lighting device (33) has a higher color rendering property than the first lighting device (31). [9] Cell unit (100, 100a, 100b, 100c) according to any one of claims 1 to 8, wherein the cell unit (100, 100a, 100b, 100c) is arranged in a transport vehicle, and the sensor (40) detects the brightness outside the cell, which is a brightness inside the transport vehicle. [10] Transport vehicle comprising the following: the cell unit (100, 100a, 100b, 100c) according to one of claims 1 to 9 and a transport body within which the cell unit (100, 100a, 100b, 100c) is arranged. [11] Method for controlling the lighting in a cell unit (100, 100a, 100b, 100c) comprising: Side walls, a ceiling (12) and a floor (13) that form a cell, a toilet bowl (20) located in the cell, a first lighting device (31) which emits light to illuminate an interior of the cell, wherein the first lighting device (31) is arranged on the ceiling (12) or one of the side walls, and a second lighting device (32, 132a, 132b, 232, 332a, 332b) emitting light to illuminate a floor area of ​​the cell, the floor area being part of the floor (13), wherein the second lighting device (32, 132a, 132b, 232, 332a, 332b) is arranged in the cell at a position lower than an upper end of the toilet bowl (20), the procedure includes the following: the detection of brightness outside the cell, causing the second lighting device to emit light having a first color temperature lower than the color temperature of the light emitted by the first lighting device (31), when the recorded brightness is a predetermined brightness or less, and The process of causing the second lighting device to emit light with a second color temperature higher than the first color temperature when the recorded brightness is greater than the predetermined brightness.

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