Identification lights

Abstract

The objective of this disclosure is to improve the visibility of marker lights. [Solution] The indicator light A1 comprises a light source 10, an indicator panel 92 to which the light emitted from the light source 10 is irradiated, and a normal lighting circuit unit 120 that lights the light source 10 with normal power supplied from a normal power supply 8. The indicator panel 92 has an indicator surface 920 that is exposed to the outside. The indicator surface 920 has dimensions equal to or larger than a rectangle of 200 mm x 200 mm. The normal lighting circuit unit 120 ensures that the average brightness of the indicator surface 920 is 110 cd / m² when the light emitted from the light source 10 is irradiated onto the indicator panel 92. 2 More than 450cd / m 2 Light source 10 is turned on as follows:

Description

Technical Field

[0001] The present disclosure relates to a marker lamp, and more particularly to a marker lamp that can be used for marking the installation position of emergency equipment and the like.

Background Art

[0002] Patent Document 1 discloses a light marking member that marks the installation location of a fire extinguisher or the like by diffusely reflecting incident light during the day or in a bright place to perform marking by the reflected light, and absorbing external light and emitting afterglow at night or in a dark place to perform marking by the emitted afterglow.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When a sign marking the installation location of equipment used in an emergency such as a fire extinguisher is marked by afterglow in a dark place as disclosed in Patent Document 1, it is difficult to always maintain the visibility of the sign. Also, the optical characteristics required for a marker lamp having such a sign are not known.

[0005] An object of the present disclosure is to provide a marker lamp that can maintain good visibility of the sign.

Means for Solving the Problems

[0006] A marker light according to one aspect of the present disclosure comprises a light source, a marker panel to which the light emitted from the light source is irradiated, and a normal lighting circuit unit that lights the light source with normal power supplied from a normal power source. The marker panel has a marker surface exposed to the outside, and the marker surface has dimensions equal to or larger than a rectangle of 200 mm × 200 mm. The normal lighting circuit unit ensures that when the light emitted from the light source is irradiated onto the marker panel, the average brightness of the marker surface is 110 cd / m². 2 More than 450cd / m 2 The light source is turned on as follows:

[0007] A marker light according to another aspect of the present disclosure comprises a light source, a marker panel to which the light emitted from the light source is irradiated, and a normal lighting circuit unit that lights the light source with normal power supplied from a normal power source. The marker panel has a marker surface exposed to the outside, and the marker surface has dimensions smaller than a rectangle of 200 mm × 200 mm. The normal lighting circuit unit ensures that when the light emitted from the light source is irradiated onto the marker panel, the average brightness of the marker surface is 150 cd / m². 2 More than 800cd / m 2 The light source is turned on as follows:

[0008] A marker light according to yet another aspect of the present disclosure comprises a light source, a marker panel illuminated by light emitted from the light source, and a normal lighting circuit that lights the light source with normal power supplied from a normal power source. The marker panel has a marker surface exposed to the outside. The marker surface has a symbol portion and a background portion. When the normal lighting circuit is illuminating the light source, the luminance Lw of the symbol portion and the luminance Lr of the background portion satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99. [Effects of the Invention]

[0009] This disclosure has the advantage of being able to maintain good visibility of signs in sign lights. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a perspective view of a signal light according to an embodiment of the present disclosure. [Figure 2] Figure 2 is an exploded perspective view of the same indicator light. [Figure 3] Figure 3 is a block diagram of the same marker light. [Figure 4] Figure 4 shows an example of a sign on the same sign light. [Figure 5] Figure 5 shows another example of a sign on the same sign light. [Figure 6] Figure 6 is a graph showing the relationship between the apparent size of a sign or other object and its average brightness, assuming the same level of visibility for the sign or object. [Modes for carrying out the invention]

[0011] Hereinafter, a marker light A1 according to an embodiment of this disclosure will be described in detail with reference to the drawings. However, the configuration described in the following embodiments is merely one example of this disclosure. This disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of this disclosure can be achieved.

[0012] 1. Overview The marker lamp A1 of the embodiment (see Figures 1 and 2) comprises a light source 10, a marker panel 92 illuminated by light emitted from the light source 10, and a normal lighting circuit 120 that lights the light source 10 with normal power supplied from a normal power supply 8 (see Figure 3). The marker panel 92 has a marker surface 920 that is exposed to the outside. The normal power is AC power with a voltage of 100V and a frequency of 50Hz or 60Hz.

[0013] In the first embodiment, the sign surface 920 has dimensions equal to or larger than a rectangle of 200 mm x 200 mm, and the normal lighting circuit section 120 ensures that when light emitted from the light source 10 illuminates the sign panel 92, the average brightness of the sign surface 920 is 110 cd / m². 2 More than 450cd / m 2 Light source 10 is turned on as follows:

[0014] Furthermore, in the second embodiment, the sign surface 920 has dimensions smaller than a rectangular shape of 200 mm x 200 mm, and the normal lighting circuit section 120 is configured such that when light emitted from the light source 10 irradiates the sign panel 92, the average brightness of the sign surface 920 is 110 cd / m². 2 More than 450cd / m 2 Light source 10 is turned on as follows:

[0015] The average luminance is measured using an illuminance meter, for example, as specified in JIS C1609.

[0016] In the third embodiment, the sign surface 920 has a symbol section 922 and a background section 921, and when the normal lighting circuit section 120 lights the light source 10, the luminance Lw of the symbol section 922 and the luminance Lr of the background section 921 satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99. This luminance is measured by a luminance meter.

[0017] According to these embodiments, the sign represented by the sign surface 920 can be easily seen.

[0018] The sign surface 920 indicates the location of emergency equipment. When the sign surface 920 is clearly visible, people can quickly recognize the location of the emergency equipment in an emergency and use it. Furthermore, by viewing the sign surface 920 at times other than emergencies, people can easily become aware of the location of the emergency equipment, and therefore, people can quickly use the emergency equipment in an emergency.

[0019] 2. Structure of marker lights In the following description, the side of marker light A1 facing the marker surface 920 is defined as the front, and the side opposite the front is defined as the rear. The top and bottom of marker light A1 are defined as the top and bottom of the marker represented by the marker surface 920, respectively. Furthermore, when the top and bottom and front and back for the observer are aligned with the top and bottom and front and back for marker light A1, the right and left for the observer are defined as the right and left for marker light A1. Note that these definitions of top, bottom, front, back, left, and right are for convenience only and do not restrict the orientation of marker light A1 when it is installed.

[0020] As shown in Figure 3, the marker light A1 of the embodiment includes a light source 10, a storage battery 11, a rectifier and smoothing unit 16, a power supply unit 12, an emergency lighting circuit unit 13, a control circuit unit 14, a switching unit 17, and a control power supply circuit unit 18, among others.

[0021] The light source 10 has, for example, a light-emitting diode. However, the light source 10 is not limited to having a light-emitting diode, and may also have a cold cathode fluorescent lamp or the like. The light source 10 is configured to irradiate the label panel 92 with light emitted from the light-emitting diode.

[0022] The battery 11 is, for example, a nickel-metal hydride battery. However, the battery 11 may also be a lithium-ion battery or the like.

[0023] The rectifier and smoothing unit 16 is configured to rectify and smooth the normal power (AC voltage) supplied from the normal power supply 8. For example, the rectifier and smoothing unit 16 includes a full-wave rectifier consisting of a diode bridge and a smoothing capacitor that smooths the pulsating voltage output from the full-wave rectifier. However, in addition to the full-wave rectifier and smoothing capacitor, the rectifier and smoothing unit 16 may also include a power factor correction circuit consisting of a boost chopper circuit or the like.

[0024] The power supply unit 12 includes a flyback converter that steps down the DC voltage supplied from the rectifier and smoothing unit 16, a normal lighting circuit unit 120, and a charging circuit unit 121. The normal lighting circuit unit 120 is configured to light up the light source 10 with the DC voltage stepped down by the flyback converter.

[0025] The normal lighting circuit 120 lights the light source 10 using normal power supplied from the normal power supply 8. The charging circuit 121 charges the storage battery 11 using normal power. The charging circuit 121 is configured to charge the storage battery 11 using a DC voltage stepped down by, for example, a flyback converter.

[0026] The emergency lighting circuit 13 is configured to light the light source 10 using emergency power supplied from the storage battery 11.

[0027] The switching unit 17 is configured to selectively switch between a connected state in which the normal lighting circuit unit 120 and the light source 10 are electrically connected, and a disconnected state in which the normal lighting circuit unit 120 and the light source 10 are electrically disconnected.

[0028] The control power supply circuit 18 is configured to generate a control power supply voltage from the DC voltage output from the flyback converter of the power supply unit 12 and the discharge voltage of the storage battery 11. The control power supply voltage generated by the control power supply circuit 18 is supplied to circuits having active elements, namely the power supply unit 12, the switching unit 17, the emergency lighting circuit unit 13, and the control circuit unit 14.

[0029] The control circuit unit 14 controls the normal lighting circuit unit 120, the charging circuit unit 121, and the emergency lighting circuit unit 13. The control circuit unit 14 is configured to selectively switch between, for example, a normal lighting mode, an emergency lighting mode, and a permanent off mode. When the control circuit unit 14 is executing the normal lighting mode, it controls the normal lighting circuit unit 120 to turn on the light source 10. When the control circuit unit 14 is executing the emergency lighting mode, it controls the emergency lighting circuit unit 13 to turn on the light source 10. When the control circuit unit 14 is executing the permanent off mode, it controls the normal lighting circuit unit 120 to turn off the light source 10. The control circuit unit 14 has a microcontroller. The control circuit unit 14 is configured to perform various processes by causing the processor of the microcontroller to execute a control program.

[0030] Next, the structure of the indicator light A1 will be described. The indicator light A1 comprises a main body A10, a light source unit A11, and a display block A12 (see Figure 2).

[0031] The main body A10 is formed from a synthetic resin material into a rectangular box shape with an opening on the front (see Figures 1 and 2). The main body A10 houses the lighting device 1, battery unit B1, terminal block 90, and mounting plate 91, etc.

[0032] The lighting device 1 comprises the circuits of the indicator light A1 shown in Figure 3, excluding the light source 10 and the battery 11, specifically the power supply unit 12, the emergency lighting circuit unit 13, the control circuit unit 14, the rectifier and smoothing unit 16, the switching unit 17, and the control power supply circuit unit 18. The lighting device 1 includes a case 100 formed in the shape of a box from a synthetic resin material, and the circuits housed in the case 100, excluding the light source 10 and the battery 11.

[0033] The mounting plate 91 is formed in a plate shape from a metal material (see Figure 2). The mounting plate 91 is screwed to the inner bottom surface of the main body A10. The lighting device 1 and the terminal block 90 are screwed to the mounting plate 91 and housed inside the main body A10. The lighting device 1 and the terminal block 90 are electrically connected. The terminal block 90 is electrically connected to the power line that is drawn in from the power hole 96 (see Figure 2) provided on the bottom surface of the main body A10. In other words, the lighting device 1 is electrically connected to the normal power supply 8 through the terminal block 90 and the power line.

[0034] The battery unit B1 comprises a rechargeable battery 11 and a battery case 111 housing the rechargeable battery 11 (see Figure 2). The battery unit B1 is detachably attached to the mounting plate 91. The battery unit B1 is configured to electrically connect the rechargeable battery 11 and the lighting device 1 when attached to the mounting plate 91.

[0035] Display block A12 includes a sign panel 92, a light guide plate 93, and a holder 94 (see Figure 3).

[0036] The sign panel 92 is formed in the shape of a rectangular flat plate from a translucent synthetic resin material such as acrylic resin or polycarbonate resin. However, the sign panel 92 may also be formed from a translucent material other than synthetic resin, such as quartz glass.

[0037] On the front surface (sign surface 920) of the sign panel 92 that is exposed to the outside of the sign light A1, a sign is displayed to indicate the installation location of emergency equipment (see Figure 3).

[0038] The sign surface 920 has a symbol portion 922 and a background portion 921. The sign represented by the sign surface 920 is composed of the symbol portion 922 and the background portion 921. That is, the sign surface 920 has a sign composed of the symbol portion 922 and the background portion 921. The symbol portion 922 and the background portion 921 are parts of the sign surface 920 that have different colors from each other. The symbol portion 922 constitutes the design of the sign, and the background portion 921 constitutes the parts of the sign other than the design.

[0039] The signs represented by sign surface 920 indicate, for example, the locations of emergency equipment within a building. Emergency equipment includes, for example, fire extinguishers or automated external defibrillators (AEDs). As specific examples of signs, Figure 4 shows a sign (guide symbol) conforming to JIS standards that indicates the location of a fire extinguisher, and Figure 5 shows a sign (guide symbol) conforming to JIS standards that indicates the location of an automated external defibrillator.

[0040] The light guide plate 93 is formed in the shape of a rectangular flat plate from a light-transmitting synthetic resin material such as acrylic resin or polycarbonate resin. The light guide plate 93 is positioned on the opposite side of the sign panel 920 from the sign surface 920, with its front surface facing the opposite side (rear surface) of the sign panel 92 (see Figure 2). Light emitted from the light source unit A11 is incident on the upper surface (incident surface 930) of the light guide plate 93. The light incident from the incident surface 930 is guided through the light guide plate 93 and emitted from the front surface of the light guide plate 93. The light emitted from the emission surface of the light guide plate 93 then irradiates the sign panel 92.

[0041] The holder 94 is formed from a non-transparent synthetic resin material in the shape of a rectangular box (frame) with an open front and top. The holder 94 holds the sign panel 92 and the light guide plate 93 such that the sign panel 92 is positioned in front of the light guide plate 93 (see Figure 2).

[0042] The display block A12 is attached to the main body A10 so as to cover the remaining portion of the opening in the main body A10, excluding the upper part where the light source unit A11 is installed (see Figure 1).

[0043] The light source unit A11 includes a light source 10, a light guide that guides the light emitted from the light source 10, and a housing 95 that houses the light source 10 and the light guide (see Figure 2).

[0044] The housing 95 is formed in the shape of a long box with its bottom and rear open. The light source 10 is mounted on a substrate and housed in one end (right end) of the housing 95 in the longitudinal direction. The light guide is formed in the shape of a long rectangular prism, with one end face (right end face) in the longitudinal direction facing the light source 10, and its longitudinal side (bottom surface) facing the opening in the bottom of the housing 95, and is housed in the housing 95. A part of the substrate on which the light source 10 is mounted (hereinafter referred to as the projection 97) protrudes from the rear surface of the housing 95 (see Figure 2).

[0045] The light source unit A11 is attached to the main body A10 by fitting it into the upper front part of the main body A10. At this time, the projection 97 is inserted into the connector 98 located in the upper right corner of the main body A10, thereby electrically connecting the light source unit A11 (light source 10) and the lighting device 1 via the connector 98 and electric wires (not shown).

[0046] With the light source unit A11 attached to the main body A10, the incident surface 930 of the light guide plate 93 and the exit port of the light source unit A11 face each other in the vertical direction. Therefore, almost all of the light emitted from the exit port of the light source unit A11 enters the light guide plate 93 from the incident surface 930. The light that enters the light guide plate 93 travels through the light guide plate 93, undergoes total internal reflection at the rear surface of the holder 94, and exits forward from the exit surface of the light guide plate 93 to illuminate the sign panel 92.

[0047] Next, the basic operation of the indicator light A1 will be explained. The control circuit unit 14 is configured to selectively switch between three operating modes (normal lighting mode, emergency lighting mode, and permanently off mode).

[0048] When normal power is supplied from the normal power supply 8, the control circuit unit 14 basically operates in normal lighting mode. While operating in normal lighting mode, the control circuit unit 14 switches the switching unit 17 to the connected state to light up the light source 10 in the normal lighting circuit unit 120 and charges the storage battery 11 in the charging circuit unit 121.

[0049] Furthermore, the control circuit unit 14 executes an emergency lighting mode if the normal power supply 8 is no longer supplied due to a power outage. While executing the emergency lighting mode, the control circuit unit 14 stops the power supply unit 12 and switches the switching unit 17 to a disconnected state, causing the emergency lighting circuit unit 13 to light up the light source 10 (emergency lighting).

[0050] Furthermore, the control circuit unit 14 executes a permanent off mode when a power-off signal is input from an external source while normal power is being supplied from the normal power supply 8. While executing the permanent off mode, the control circuit unit 14 stops the normal lighting circuit unit 120 and turns off the light source 10, while keeping the charging circuit unit 121 running.

[0051] 3.1. First Embodiment In the first embodiment, the sign surface 920 has dimensions equal to or larger than those of a rectangle of 200 mm × 200 mm. That the sign surface 920 has dimensions equal to those of a rectangle of 200 mm × 200 mm means that the sign surface 920 is in the shape of a rectangle of 200 mm × 200 mm. Further, that the sign surface 920 has dimensions larger than those of a rectangle of 200 mm × 200 mm means that when the sign surface 920 and a rectangle of 200 mm × 200 mm are overlaid, this rectangle fits inside the outer periphery of the sign surface 920 and there is a portion of the sign surface 920 that protrudes from the rectangle. The sign surface 920 is, for example, rectangular with a vertical dimension (up-and-down dimension) of 200 mm or more and a horizontal dimension (left-and-right dimension) of 200 mm or more. In this case, it is preferable that the sign surface 920 is rectangular with a vertical dimension of 200 mm or more and less than 400 mm and a horizontal dimension of 200 mm or more and less than 400 mm.

[0052] In the first embodiment, the normal lighting circuit section 120 lights the light source 10 such that when the light emitted by the light source 10 irradiates the sign panel 92, the average luminance of the sign surface 920 is 110 cd / m 2 or more and 450 cd / m 2 or less.

[0053] That is, the light source 10 is configured to emit light such that the average luminance of the sign surface 920 is 110 cd / m 2 or more and 450 cd / m 2 or less. Further, the normal lighting circuit section 120 is configured to supply power to the light source 10 such that when the normal lighting circuit section 120 lights the light source 10, the light source 10 emits light such that the average luminance of the sign surface 920 is 110 cd / m 2 or more and 450 cd / m 2 or less. In other words, the light source 10 and the normal lighting circuit section 120 are designed such that when the normal lighting circuit section 120 lights the light source 10, the average luminance of the sign surface 920 is 110 cd / m<00000​​​​​​In the first embodiment, when the marking surface 920 has dimensions equal to or larger than a rectangle of 200 mm × 200 mm, the average brightness of the marking surface 920 is 110 cd / m². 2 More than 450cd / m 2 The following conditions ensure that the sign represented on the sign surface 920 is easily visible. For example, in buildings, fire extinguishers are required by the Fire Service Act to be installed at intervals of 30m or less. Therefore, the sign surface 920 indicating the installation location of fire extinguishers should be visible from a distance of 15m from the sign surface 920. In the first embodiment, a person can easily see the sign displayed on the sign surface 920 even from a distance of 15m from the sign surface 920.

[0055] In the first embodiment, when the emergency lighting circuit unit 13 lights the light source 10 during a power outage, the emergency lighting circuit unit 13 ensures that the average brightness of the sign surface 920 is 45 cd / m² when the light emitted from the light source 10 illuminates the sign panel 92. 2 More than 180cd / m 2 It is preferable to light up the light source 10 as follows:

[0056] Specifically, the light source 10 has an average brightness of 45 cd / m² on the sign surface 920. 2 More than 180cd / m 2 The light source is configured to emit light as follows. Furthermore, when the emergency lighting circuit 13 supplies power from the battery 11 to the light source 10 to light up the light source 10, the average brightness of the sign surface 920 is 45 cd / m². 2 More than 180cd / m 2 The system is configured to supply enough power to the light source 10 to emit light, such that the average brightness of the sign surface 920 is 45 cd / m² when the emergency lighting circuit 13 illuminates the light source 10. 2 More than 180cd / m 2 It is designed to be as follows:

[0057] In a situation where a power outage prevents the supply of normal power from the normal power supply 8, and the emergency lighting mode is activated, causing the emergency lighting circuit 13 to illuminate the light source 10, the area around the indicator light A1 becomes dark due to the power outage. When the area around the indicator light A1 is dark in this way, the average brightness of the indicator surface 920 is 45 cd / m². 2 More than 180cd / m 2 The following conditions ensure that the sign displayed on the sign surface 920 is easily visible. For example, a person can easily see the sign represented on the sign surface 920 from a distance of 15 m from the sign surface 920.

[0058] 3.2. Second Embodiment In the second embodiment, the sign surface 920 has dimensions smaller than a 200mm x 200mm rectangle. Having dimensions smaller than a 200mm x 200mm rectangle means that when the rectangle and the sign surface 920 are superimposed, the sign surface 920 fits inside the outer perimeter of the rectangle, and the rectangle has a portion that extends beyond the sign surface 920. The sign surface 920 is, for example, a rectangle with a vertical dimension of 200mm or less and a horizontal dimension of less than 200mm, or a rectangle with a vertical dimension of less than 200mm and a horizontal dimension of 200mm or less. In this case, it is preferable that the sign surface 920 is a rectangle with a vertical dimension of 100mm or more and less than 200mm and a horizontal dimension of 100mm or more and less than 200mm.

[0059] In the second embodiment, the normal lighting circuit section 120 ensures that when light emitted from the light source 10 illuminates the sign panel 92, the average brightness of the sign surface 920 is 150 cd / m². 2 More than 800cd / m 2 Light source 10 is turned on as follows:

[0060] In other words, the light source 10 has an average brightness of 150 cd / m² on the marking surface 920. 2 More than 800cd / m 2 The device is configured to emit light as follows. Furthermore, when the normal lighting circuit 120 lights the light source 10, the light source 10 has an average brightness of 150 cd / m² on the sign surface 920. 2 More than 800cd / m 2The system is configured to supply enough power to the light source 10 to emit light as follows: In other words, the light source 10 and the normal lighting circuit 120 are configured such that when the normal lighting circuit 120 lights up the light source 10, the average brightness of the sign surface 920 is 150 cd / m². 2 More than 800cd / m 2 It is designed to be as follows:

[0061] In the second embodiment, when the sign surface 920 has dimensions smaller than a rectangular shape of 200 mm × 200 mm, the average brightness of the sign surface 920 is 150 cd / m². 2 More than 800cd / m 2 The following conditions ensure that the sign displayed on the sign surface 920 is easily visible. For example, as mentioned above, the Fire Service Act mandates that fire extinguishers be installed at intervals of 30m or less, and therefore, signs indicating the installation location of fire extinguishers should be visible from a distance of 15m from the sign. In the second embodiment, a person can easily see the sign displayed on the sign surface 920 even from a distance of 15m from the sign surface 920.

[0062] In the second embodiment, when the emergency lighting circuit unit 13 lights the light source 10, the emergency lighting circuit unit 13 ensures that the average brightness of the sign surface 920 is 100 cd / m² when the light emitted from the light source 10 illuminates the sign panel 92. 2 More than 400cd / m 2 It is preferable to light up the light source 10 as follows:

[0063] In other words, the light source 10 has an average brightness of 100 cd / m² on the marking surface 920. 2 More than 400cd / m 2 The light source is configured to emit light as follows. Furthermore, when the emergency lighting circuit 13 supplies power from the storage battery 11 to the light source 10 to light up the light source 10, the light source 10 has an average brightness of 100 cd / m² on the sign surface 920. 2 More than 400cd / m 2The system is configured to supply enough power to the light source 10 to emit light as follows: In other words, the light source 10, the storage battery 11, and the emergency lighting circuit unit 13 are configured so that when the emergency lighting circuit unit 13 lights up the light source 10, the average brightness of the sign surface 920 is 100 cd / m². 2 More than 400cd / m 2 It is designed to be as follows:

[0064] In a situation where a power outage prevents the supply of normal power from the normal power supply 8, and the emergency lighting mode is activated, causing the emergency lighting circuit 13 to illuminate the light source 10, the area around the indicator light A1 becomes dark due to the power outage. When the area around the indicator light A1 is dark in this way, the average brightness of the indicator surface 920 is 100 cd / m². 2 More than 400cd / m 2 The following conditions ensure that the sign displayed on the sign surface 920 is easily visible. For example, a person can easily see the sign represented on the sign surface 920 from a distance of 15 m from the sign surface 920.

[0065] 3.3. Operation of the First and Second Embodiments Regarding the operation of the first and second embodiments, the inventors actually manufactured a marker light A1, placed the marker light A1 inside a building, and confirmed the visibility of the markers on the marker light A1.

[0066] As a result, when the lighting fixtures are turned on around the marker light A1, if the marker surface 920 is a rectangle of 200 mm x 200 mm or larger, the average brightness of the marker surface 920 is 110 cd / m². 2 More than 450cd / m 2 It was confirmed that the sign displayed on the sign surface 920 is clearly visible from a distance of 15 m from the sign surface 920 if the following conditions are met. Furthermore, if the sign surface 920 is smaller than a 200 mm x 200 mm rectangle, the average brightness of the sign surface 920 must be 150 cd / m². 2 More than 800cd / m 2 The following conditions were met, and it was confirmed that the sign marked on the sign surface 920 could be clearly seen from a position 15 m away from the sign surface 920.

[0067] Furthermore, under conditions where no lighting fixtures are turned on around the marker light A1 at night, if the marker surface 920 is a rectangular shape of 200 mm x 200 mm or larger, the average luminance of the marker surface 920 is 45 cd / m². 2 More than 180cd / m 2 It was confirmed that the sign displayed on the sign surface 920 is clearly visible from a distance of 15 m from the sign surface 920 if the following conditions are met. Furthermore, if the sign surface 920 is smaller than a 200 mm x 200 mm rectangle, the average brightness of the sign surface 920 must be 100 cd / m². 2 More than 400cd / m 2 The following conditions were met, and it was confirmed that the sign marked on the sign surface 920 could be clearly seen from a position 15 m away from the sign surface 920.

[0068] The operation of the first and second embodiments can also be confirmed as follows.

[0069] Regarding the first embodiment, according to JIL5502, the technical standard for emergency exit sign fixtures and emergency guidance system equipment by the Japan Lighting Manufacturers Association, if the vertical dimension of the display surface of an emergency exit sign is 200 mm or more and less than 400 mm, the effective range (distance) is 30 m, and the brightness of the display surface is 250 cd / m² under normal use. 2 More than 1000cd / m 2 Less than 100 cd / m² during a power outage. 2 More than 400cd / m 2 It is defined as less than (Category B).

[0070] Furthermore, according to the Emergency Lighting Standards Committee of the Illuminating Engineering Institute of Japan, published in 2005, the apparent size [area (mm²)] of the display surface that has the same visibility (visibility) is the same. 2 ) / {distance(m)} 2 ] and average brightness [cd / m² 2 The relationship with follows the isoattractiveness curve shown as "A" in Figure 6.

[0071] Figures "B" and "C" in Figure 6 show the isoconcentration curves for normal use that conform to the standard brightness requirements for Category B of JIL5502, based on the isoconcentration curve shown in "A". Specifically, the curve in "B" represents the average luminance of 1000 cd / m² when the vertical dimension of the display surface is 200 mm and the distance is 30 m (apparent size 44.4). 2 This is an isoconcentration curve showing the relationship between apparent size and average brightness, which is the same as in the case of [the other case]. Furthermore, the curve labeled "C" represents the conspicuousness when the vertical dimension of the display surface is 200 mm and the distance is 30 m (apparent size 44.4) and the average brightness is 250 cd / m². 2 This is an isoattraction curve that shows the relationship between apparent size and average brightness, which is the same as in the case of [another case].

[0072] Based on the isoattractiveness curve of "B", the average brightness is 1000 cd / m². 2 The average brightness at a distance of 15m (apparent size 177.8) is 450 cd / m² to achieve the same level of visibility as at a distance of 30m (apparent size 44.4). 2 Furthermore, based on the isoattractiveness curve of "C", the average brightness is 250 cd / m². 2 The average brightness at a distance of 15m (apparent size 177.8) is 110 cd / m², which is the same level of visibility as at a distance of 30m (apparent size 44.4). 2 That is the case.

[0073] Therefore, as in the first embodiment, the sign surface 920 has dimensions equal to or larger than a 200 mm x 200 mm rectangle, and the average brightness of the sign surface 920 when the normal lighting circuit section 120 lights the light source 10 is 110 cd / m². 2 More than 450cd / m 2 If the following conditions are met, it can be determined that the lighting can have the same level of visibility at a distance of 15m as emergency lighting that meets the normal operating standards of JIL5502 Category B.

[0074] By a similar method, if the sign surface 920 has dimensions equal to or larger than a 200mm x 200mm rectangle, and the emergency lighting circuit 13 illuminates the light source 10 during a power outage, the average brightness of the sign surface 920 is 45 cd / m².2 More than 180cd / m 2 If the following conditions are met, it can be determined that the lighting can have the same level of visibility as emergency lighting that meets the power outage standards of Category B of JIL5502 at a distance of 15m.

[0075] Furthermore, regarding the second embodiment, according to JIL5502, the technical standard for emergency exit sign fixtures and emergency guidance system equipment by the Japan Lighting Manufacturers Association, if the vertical dimension of the display surface of an emergency exit sign is 100 mm or more and less than 200 mm, the effective range (distance) is 15 m, and the brightness of the display surface is 150 cd / m² under normal use. 2 More than 800cd / m 2 Less than 100 cd / m² during a power outage. 2 More than 400cd / m 2 It is defined as less than (Category C).

[0076] Therefore, as in the second embodiment, the sign surface 920 has dimensions smaller than a rectangular shape of 200 mm x 200 mm, and the average brightness of the sign surface 920 when the normal lighting circuit section 120 lights the light source 10 is 150 cd / m². 2 More than 800cd / m 2 If the following conditions are met, it can be determined that the visibility at a distance of 15m is comparable to that of emergency lighting that meets the normal operating standards of JIL5502 Category C. Furthermore, if the sign surface 920 has dimensions smaller than a 200mm x 200mm rectangle, and the average brightness of the sign surface 920 when the emergency lighting circuit 13 illuminates the light source 10 during a power outage is 100 cd / m² 2 More than 400cd / m 2 If the following conditions are met, it can be determined that the lighting can have the same level of visibility as emergency lighting that meets the power outage standards of JIL5502 Category C at a distance of 15m.

[0077] 3.4. Third Embodiment In the third embodiment, when the normal lighting circuit unit 120 is lighting the light source 10, the luminance Lw of the symbol portion 922 on the sign surface 920 and the luminance Lr of the background portion 921 on the sign surface 920 satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0078] In other words, the light source 10, the normal lighting circuit 120, the color of the symbol section 922, and the color of the background section 921 are designed such that when the normal lighting circuit 120 is lighting the light source 10, the luminance Lw of the symbol section 922 and the luminance Lr of the background section 921 satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0079] Furthermore, the luminance Lw of the symbol portion 922 may be the luminance at any position in the symbol portion 922, and the luminance Lr of the background portion 921 may be the luminance at any position in the background portion 921. In particular, it is preferable that the luminance Lw of the portion of the symbol portion 922 touching the boundary with the background portion 921 and the luminance Lr of the portion of the background portion 921 touching the boundary with the symbol portion 922 satisfy the above relationship.

[0080] If the luminance Lw of the symbol portion 922 and the luminance Lr of the background portion 921 on the sign surface 920 have the above-described relationship, then a person looking at the sign surface 920 can clearly see the symbol portion 922 and the background portion 921, that is, the sign composed of the symbol portion 922 and the background portion 921 can be clearly seen.

[0081] In particular, when the symbol portion 922 is white and the background portion 921 is red, if the relationship 0.8 < (Lw - Lr) / Lw < 0.99 is satisfied, the symbol portion 922 and the background portion 921 can be clearly distinguished. Note that red refers to the color 5R on the Munsell color circle, or a color that is perceived as close to 5R. For example, red refers to the colors from 5RP to 5YR on the Munsell color circle.

[0082] The inventor actually fabricated a sign surface 920 in which the color of the symbol part 922 was white, the color of the background part 921 was red, and the brightness of the background part 921 was varied. These sign surfaces 920 were attached to the sign light A1, and with the light source 10 illuminated, the sign surfaces 920 were observed from a distance of 15 m from the sign surface 920. As a result, when the value of (Lw-Lr) / Lw, which is derived from the brightness Lw of the part of the symbol part 922 touching the boundary with the background part 921 and the brightness Lr of the part of the background part 921 touching the boundary with the symbol part 922, was 0.8, the color of the background part 921 appeared faint, making it difficult to recognize the shape of the symbol part 922. Also, when the value of (Lw-Lr) / Lw was 0.99, the color of the background part 921 became too close to black, making it difficult to recognize the color of the background part 921. In contrast, when the value of (Lw-Lr) / Lw was greater than 0.8 and less than 0.99, the color of the background portion 921 could be easily recognized, and the shape of the symbol portion 922 could be easily recognized.

[0083] In the third embodiment, when the emergency lighting circuit unit 13 is lighting the light source 10, it is preferable that the luminance Lw of the symbol portion 922 on the sign surface 920 and the luminance Lr of the background portion 921 on the sign surface 920 satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0084] In other words, it is preferable that the light source 10, the storage battery 11, the emergency lighting circuit 13, the color of the symbol section 922, and the color of the background section 921 are designed such that when the emergency lighting circuit 13 is lighting the light source 10, the luminance Lw of the symbol section 922 and the luminance Lr of the background section 921 satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0085] In this case, even when a power outage prevents the supply of normal power from the normal power source 8, and the emergency lighting mode is activated, causing the emergency lighting circuit unit 13 to illuminate the light source 10, a person looking at the sign surface 920 can clearly see the symbol unit 922 and the background unit 921, that is, the sign can be clearly seen.

[0086] In the third embodiment, there are no restrictions on the dimensions of the sign surface 920. The sign surface 920 may have dimensions equal to or larger than a 200 mm × 200 mm rectangle, as in the first embodiment, or it may have dimensions smaller than a 200 mm × 200 mm rectangle, as in the second embodiment.

[0087] Furthermore, the configuration of the first embodiment and the configuration of the third embodiment may be combined. That is, in the first embodiment, when the normal lighting circuit unit 120 is lighting the light source 10, the luminance Lw of the symbol part 922 on the sign surface 920 and the luminance Lr of the background part 921 on the sign surface 920 may satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99. In addition, when the emergency lighting circuit unit 13 is lighting the light source 10, the luminance Lw of the symbol part 922 on the sign surface 920 and the luminance Lr of the background part 921 on the sign surface 920 may satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0088] Furthermore, the configuration of the second embodiment and the configuration of the third embodiment may be combined. That is, in the second embodiment, when the normal lighting circuit unit 120 is lighting the light source 10, the luminance Lw of the symbol part 922 on the sign surface 920 and the luminance Lr of the background part 921 on the sign surface 920 may satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99. In addition, when the emergency lighting circuit unit 13 is lighting the light source 10, the luminance Lw of the symbol part 922 on the sign surface 920 and the luminance Lr of the background part 921 on the sign surface 920 may satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0089] 4. Appearance As will be apparent from the embodiments described above, this disclosure includes the following aspects.

[0090] The marker light (A1) according to the first embodiment comprises a light source (10), a marker panel (92) to which the light emitted from the light source (10) is irradiated, and a normal lighting circuit (120) that lights the light source (10) with normal power supplied from a normal power source (8). The marker panel (92) has a marker surface (920) that is exposed to the outside. The marker surface (920) has dimensions equal to or larger than a rectangle of 200 mm x 200 mm. The normal lighting circuit (120) ensures that when the light emitted from the light source (10) is irradiated onto the marker panel (92), the average brightness of the marker surface (920) is 110 cd / m². 2 More than 450cd / m 2 The light source (10) is turned on as follows:

[0091] According to this embodiment, the visibility of the sign in the sign light (A1) can be maintained in good condition.

[0092] In a second embodiment, the indicator light (A1) further comprises a storage battery (11) and an emergency lighting circuit (13) that lights the light source (10) with emergency power supplied from the storage battery (11) in the event of a power outage. The emergency lighting circuit (13) ensures that the average brightness of the indicator surface (920) is 45 cd / m² when the light emitted from the light source (10) is irradiated onto the indicator panel (92). 2 More than 180cd / m 2 The light source (10) is turned on as follows:

[0093] According to this embodiment, the visibility of the sign on the sign light (A1) can be maintained well even during a power outage.

[0094] The third embodiment of the marker light (A1) comprises a light source (10), a marker panel (92) to which the light emitted from the light source (10) is irradiated, and a normal lighting circuit unit (120) that lights the light source (10) with normal power supplied from a normal power supply (8). The marker panel (92) has a marker surface (920) that is exposed to the outside. The marker surface (920) has dimensions smaller than a rectangle of 200 mm x 200 mm. The normal lighting circuit unit (120) ensures that when the light emitted from the light source (10) is irradiated onto the marker panel (92), the average brightness of the marker surface (920) is 150 cd / m². 2 More than 800cd / m 2 The light source (10) is turned on as follows:

[0095] According to this embodiment, the visibility of the sign in the sign light (A1) can be maintained in good condition.

[0096] In a fourth embodiment, in the third embodiment, the indicator light (A1) further comprises a storage battery (11) and an emergency lighting circuit unit (13) that lights the light source (10) with emergency power supplied from the storage battery (11) in the event of a power outage. The emergency lighting circuit unit (13) ensures that when the light emitted from the light source (10) illuminates the indicator panel (92), the average brightness of the indicator surface (920) is 100 cd / m². 2 More than 400cd / m 2 The light source (10) is turned on as follows:

[0097] According to this embodiment, the visibility of the sign on the sign light (A1) can be maintained well even during a power outage.

[0098] In the fifth embodiment, in any one of the first to fourth embodiments, the indicator surface (920) has a background portion (921) and a symbol portion (922). When the normal lighting circuit portion (120) is illuminating the light source (10), the luminance Lw of the symbol portion (922) and the luminance Lr of the background portion (921) satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0099] According to this embodiment, the visibility of the sign in the sign light (A1) can be maintained even more effectively.

[0100] In the sixth embodiment, as in the fifth embodiment, the symbol portion (922) is white and the background portion (921) is red.

[0101] According to this embodiment, the visibility of the sign in the sign light (A1) can be maintained even more effectively.

[0102] The seventh embodiment of the marker light (A1) comprises a light source (10), a marker panel (92) illuminated by light emitted from the light source (10), and a normal lighting circuit unit (120) that lights up the light source (10) with normal power supplied from a normal power supply (8). The marker panel (92) has a marker surface (920) that is exposed to the outside. The marker surface (920) has a symbol part (922) and a background part (921). When the normal lighting circuit unit (120) lights up the light source (10), the luminance Lw of the symbol part (922) and the luminance Lr of the background part (921) satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.99.

[0103] According to this embodiment, the visibility of the sign in the sign light (A1) can be maintained in good condition.

[0104] In the eighth aspect, as in the seventh aspect, the symbol portion (922) is white and the background portion (921) is red.

[0105] According to this embodiment, the visibility of the sign in the sign light (A1) can be maintained even more effectively.

[0106] In the ninth embodiment, in any one embodiment from the first to the eighth, the sign surface (920) has a sign indicating the installation location of emergency equipment. [Explanation of Symbols]

[0107] A1 beacon light 8 Regular power supply 10 light source 11. Storage batteries 13 Emergency lighting circuit section 120 Regular lighting circuit section 92 Sign Panel 920 Sign surface 921 Background part 922 Symbol section

Claims

1. Light source and A marker panel illuminated by light emitted from the aforementioned light source, It comprises a normal lighting circuit section that lights the light source using normal power supplied from a normal power source, The sign panel has a sign surface that is exposed to the outside, and the sign surface has dimensions equal to or larger than a rectangle of 200 mm x 200 mm. The aforementioned normal lighting circuit ensures that when the light emitted from the light source illuminates the sign panel, the average brightness of the sign surface is 110 cd / m². ２ 450cd / m or more ２ The light source is turned on as follows: Beacon light.

2. Storage batteries and The system further includes an emergency lighting circuit that illuminates the light source using emergency power supplied from the battery during a power outage, The emergency lighting circuit unit ensures that when the light emitted from the light source illuminates the sign panel, the average brightness of the sign surface is 45 cd / m². ２ 180cd / m or more ２ The light source is turned on as follows: The marker lamp according to claim 1.

3. Light source and A marker panel illuminated by light emitted from the aforementioned light source, It comprises a normal lighting circuit section that lights the light source using normal power supplied from a normal power source, The sign panel has a sign surface that is exposed to the outside, and the sign surface has dimensions smaller than a rectangle of 200 mm x 200 mm. The normal lighting circuit section ensures that when the light emitted from the light source illuminates the sign panel, the average brightness of the sign surface is 150 cd / m². ２ More than 800cd / m ２ The light source is turned on as follows: Beacon light.

4. Storage batteries and The system further includes an emergency lighting circuit that illuminates the light source using emergency power supplied from the battery during a power outage, The emergency lighting circuit unit ensures that when the light emitted from the light source illuminates the sign panel, the average brightness of the sign surface is 100 cd / m². ２ More than 400cd / m ２ The light source is turned on as follows: The indicator light according to claim 3.

5. The sign surface has a background portion and a symbol portion. When the normal lighting circuit unit is illuminating the light source, the luminance Lw of the symbol unit and the luminance Lr of the background unit satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.

99. The marker light according to claim 1 or 3.

6. The symbol portion is white, and the background portion is red. The indicator light according to claim 5.

7. Light source and A marker panel illuminated by light emitted from the aforementioned light source, It comprises a normal lighting circuit section that lights the light source using normal power supplied from a normal power source, The sign panel has a sign surface that is exposed to the outside, The sign surface has a symbol portion and a background portion. When the normal lighting circuit unit is illuminating the light source, the luminance Lw of the symbol unit and the luminance Lr of the background unit satisfy the relationship 0.8 < (Lw - Lr) / Lw < 0.

99. Beacon light.

8. The symbol portion is white, and the background portion is red. The indicator light according to claim 7.

9. The sign surface has a sign indicating the installation location of emergency equipment. A marker light according to claim 1, 3, or 7.

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