JP5462550B2 - Charge / discharge control device and internal lighting signboard - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a charge / discharge control device that charges a plurality of batteries with electric power generated by a solar cell and supplies the same to a predetermined load, and an internal illumination signboard provided with the charge / discharge control device.

  Conventionally, with regard to a power-saving protruding sign that is not affected by other light sources such as neon advertisements and is unlikely to malfunction, a light intensity sensor is disposed inside the sign to prevent exposure to rain and dust. There is a configuration in which the signboard is turned on when the signboard is operated stably and the brightness around the signboard falls below a certain luminous intensity (see, for example, Patent Document 1).

  In addition, regarding the solar cell type display device, the display plate is formed of a material having transparency that does not hinder the arrival of sunlight to the solar cell panel, and the display plate is disposed so as to overlap the panel surface of the solar cell. Therefore, there is a configuration in which the display device is miniaturized while securing a predetermined power generation amount (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2005-282889 JP 2006-11258 A

  However, in the method of charging / discharging using solar cells as described above, it is not possible to charge / discharge a plurality of batteries equally, so that the life of individual batteries is not uniform, and power generation by solar cells When the amount temporarily decreases, there is a problem that the battery is not sufficiently charged and the lighting device is turned off.

  Therefore, in view of the technical problems described above, the present invention applies a predetermined load according to the state of charge of each battery, even if a plurality of batteries are charged from a solar cell whose amount of generated power depends on the weather. An object of the present invention is to provide a charge / discharge control device that can extend the life of all batteries by supplying power evenly and can prevent the battery from being insufficiently charged.

In order to solve the above-described problems, a charge / discharge control device according to the present invention includes a solar battery that generates predetermined power from sunlight, a plurality of storage batteries that are supplied with power from the solar battery, and are charged. A light emitting means to which driving power is supplied from the storage battery; a selecting means for selecting the storage battery to which power is supplied from the solar battery; and the storage battery for supplying driving power to the light emitting means from the plurality of storage batteries; An illuminometer that measures illuminance around the solar cell or the light emitting means, and a control means that controls to select the storage battery that supplies driving power to the light emitting means according to the illuminance measured by the illuminometer. has, serial control means selects a high storage battery having a relatively charging rate when the measured in a luminometer illuminance is high before Symbol plurality of storage batteries, the plurality when the illuminance is low Power storage Select low the battery relatively charging rate from and to control so as to supply driving power to the light emitting means.

  According to the charge / discharge control device according to the present invention, even when a plurality of batteries are charged from a solar battery whose amount of generated power depends on the weather, it is equal to a predetermined load according to the state of charge of each battery. By supplying power to the battery, it is possible to extend the life of all the batteries and to prevent the battery from being insufficiently charged.

It is a block diagram which shows the structure of the charging / discharging control apparatus of the 1st Embodiment of this invention. It is a perspective view which shows the internal illumination type | mold signboard provided with the charging / discharging control apparatus of the 1st Embodiment of this invention. It is sectional drawing which shows the side of the internal illumination type | mold signboard provided with the charging / discharging control apparatus of the 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the control which makes an internal illumination type | mold signboard light and extinguish according to the surrounding illumination intensity with the charging / discharging control apparatus of the 1st Embodiment of this invention, (a) is the day of morning, day, night on a horizontal axis. (B) is a schematic diagram in which the vertical axis indicates the illuminance around the internally illuminated signboard and the horizontal axis indicates the daytime in the morning, day and night. It is the schematic diagram which took the drive electric power of the provided light source. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the control which makes an internal illumination type | mold signboard light and extinguish according to the surrounding illumination intensity with the charging / discharging control apparatus of the 1st Embodiment of this invention, (a) is the day of morning, day, night on a horizontal axis. (B) is a schematic diagram in which the vertical axis indicates the illuminance around the internally illuminated signboard and the horizontal axis indicates the daytime in the morning, day and night. It is the schematic diagram which took the drive electric power of the provided light source.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments according to a charge / discharge control device and an internal illumination signboard of the invention will be described with reference to the drawings. Note that the charge / discharge control device and the internal illumination signboard of the present invention are not limited to the following descriptions, and can be appropriately changed without departing from the gist of the present invention.

[First Embodiment]
First, the configuration and the like of the charge / discharge control device 10 will be described with reference to FIG. 1, and then the configuration and the like of the internal illumination signboard 1 provided with the charge / discharge control device 10 will be described with reference to FIGS. Finally, the control for turning on and off the internal illumination type signboard 1 according to the ambient illuminance by the charge / discharge control device 10 will be described with reference to FIGS. 4 and 5.

  First, the configuration, specifications, operation, and the like of the charge / discharge control device 10 will be specifically described with reference to FIG.

  The charge / discharge control device 10 measures the illuminance around the internal lighting type signboard 1 to be described later using the illuminance meter 16 based on the control of the control unit 11, and determines the driving power supplied to the light source 14 according to the illuminance. The value is determined. As shown in FIG. 1, such a charge / discharge control device 10 includes a control unit 11, a solar cell 12, a battery 13, a light source 14, a relay 15, and an illuminometer 16. Hereinafter, each structural member which comprises the charging / discharging control apparatus 10 is demonstrated.

  The control part 11 which comprises the charging / discharging control apparatus 10 is a control means, Specifically, the illumination intensity around the internal illumination type | mold signboard 1 is measured using the illumination meter 16, and it supplies to the light source 14 according to this illumination intensity The drive power value to be determined is determined. Specifically, based on the control of the control unit 11, the battery 13 having a high charging rate is selected from the plurality of batteries 13 when the illuminance around the internal lighting sign 1 is high, and the internal lighting sign 1 When the illuminance around is low, the battery 13 having a low charging rate is selected, and driving power is supplied to the light source 14 provided in the internal lighting sign 1 described later. Moreover, based on control of the control part 11, the battery 13 with a low charging rate is selected in order from the battery 13 provided, and the electric power generated by the solar cell 12 is charged. Here, the charging rate represents the ratio when the full charge is 100%. Such a control unit 11 includes a ROM that stores a control program, a CPU that controls the charge / discharge control device 10 based on the control program, a charging rate of a plurality of batteries 13 and an internally illuminated signboard measured by an illuminometer 16. RAM for storing the illuminance and the like around 1, a comparator for comparing the charging rates of a plurality of batteries 13, a timer counter for measuring the timing of each control at a predetermined period, and the internal illumination type signboard 1 in a certain time zone It is comprised from the timepiece etc. which are used when making it light. Further, the control unit 11 may be provided with a counter that measures the power generated by the solar battery 12 over time.

  The solar cell 12 constituting the charge / discharge control device 10 is a power generation element that generates electric power from light energy such as sunlight by a photoelectric effect generated when sunlight or the like is irradiated onto a pn junction diode or the like. Such a solar cell 12 is made of, for example, a silicon semiconductor. Further, for example, a plurality of solar cells 12 are connected in series or in parallel as shown in FIG. 2 based on the required voltage value and current value. Moreover, the solar cell 12 is covered and protected by glass or the like having transparency in the ultraviolet light and visible light regions according to the environment or the like in which the internal illumination signboard 1 is installed. In addition, since the solar cell 12 converts light energy into electric power but does not have a power storage function, the battery 13 described later is charged with generated electric power based on the control of the control unit 11.

  The plurality of batteries 13 constituting the charge / discharge control device 10 are storage batteries that charge the power generated by the solar battery 12. As such a battery 13, for example, a lead battery, a lithium ion battery, or a battery using a super capacitor can be used. In the lead battery, for example, lead dioxide is used for the positive electrode plate, spongy lead is used for the negative electrode plate, and dilute sulfuric acid is used for the electrolytic solution. The lead battery is charged and discharged by a chemical reaction between lead and sulfuric acid. Further, in the lithium ion battery, for example, lithium cobaltate is used for the positive electrode and carbon is used for the negative electrode. The lithium ion battery is charged and discharged by reciprocating Li ions between the positive electrode and the negative electrode. A battery using a supercapacitor is a battery using a phenomenon in which positive and negative charges are stored at the interface between a solid and a liquid forming an electric double layer. The plurality of batteries 13 are each provided with a voltmeter and an ammeter (not shown), and the voltage value and current value of each battery 13 are read from the control unit 11 to calculate the charging rate of each battery 13. It is configured.

  The light source 14 constituting the charge / discharge control device 10 is a light emitting means, and specifically, is formed on the main surface of the light guide plate 20 by allowing light to enter from the end surface of the light guide plate 20 provided in the internal illumination signboard 1 to be described later. This is a light source for generating diffused light on the concave surface. Such a light source 14 is configured by arranging a plurality of white LEDs on a glass epoxy substrate or the like formed in a rod shape so as to follow the shape of the end face of the light guide plate 20. Here, when a driving current is applied to the white LED disposed in the light source 14 to cause the white LED light to enter the end face of the light guide plate 20, the white LED light is applied to the front surface and the back surface that are the main surface of the light guide plate 20. By irradiating the formed recess, diffused light is generated in each recess.

  The relays 15 constituting the charge / discharge control device 10 are selection means. Specifically, in the batteries 13 provided in the charge / discharge control device 10, power is supplied from the solar cells 12 for each individual battery 13. It is a switch that turns on or off. Such a relay 15 includes, for example, an electromagnet that changes into a mechanical movement in response to an electric signal and an open / close switch. Specifically, when the battery 13 having a low charging rate is selected from among a plurality of batteries 13 provided in the charge / discharge control device 10 based on the control of the control unit 11, the relay 15 is connected to the selected battery 13. Supplies the power generated by the solar cell 12 and turns on or off the power supply so that the battery 13 not selected is not supplied with the power generated by the solar cell 12. Similarly, the relay 15 is a switch that turns on or off the supply of drive power to the light source 14 for each battery 13 in the plurality of batteries 13 provided in the charge / discharge control device 10.

  The illuminance meter 16 constituting the charge / discharge control device 10 is an illuminance meter that measures the illuminance around the internal illumination signboard 1. Such an illuminometer 16 includes, for example, a Si photodiode having sensitivity in the wavelength region of light irradiated from the sun, and glass having transparency in the ultraviolet and visible light regions that cover and protect the Si photodiode. Consists of Here, the value of the driving power supplied from the battery 13 to the light source 14 is determined based on the value of the illuminance around the internal lighting type signboard 1 measured by the illuminometer 16. Specifically, for example, since the illuminance around the internally illuminated signboard 1 installed near the daytime or in the vicinity of a neon lamp, streetlight, etc. is measured, the interior illuminated signboard 1 is brightened by the neon lamp or streetlight. The value of the driving power supplied to the light source 14 is set high so as not to be buried. In addition, since the illuminance around the internally illuminated signboard 1 installed in a relatively dark place without an early morning, nighttime, or street light is measured, it can be identified even if the internally illuminated signboard 1 is somewhat dark. Therefore, the value of the driving power supplied to the light source 14 is set low. The function of the illuminometer 16 described above may be replaced by a configuration in which the power generated by the solar battery 12 is measured by a counter counter provided in the control unit 11. In such a case, the higher the power generated by the solar cell 12, the higher the illuminance.

  Next, the configuration, specifications, operation, and the like of the internal illumination signboard 1 provided with the charge / discharge control device 10 will be specifically described with reference to FIGS. 2 and 3.

  The interior illumination signboard 1 causes the advertising panel 30 to emit light with stable power and illuminance corresponding to the illuminance around the interior illumination signboard 1 by the charge / discharge control device 10 disposed in the interior illumination signboard 1. be able to. Such an internal illumination type signboard 1 is illuminated from the charge / discharge control device 10 described above, a light guide plate 20 that illuminates an advertising panel 30 to be described later from the back by diffused light generated in a recess formed on the main surface, and light from the light guide plate 20. For example, it is composed of an advertising panel 30 that transmits information including a company name by the emitted light, a housing 40 that fixes each component, and a column 50 that supports the housing 40. Hereinafter, each structural member which comprises the internal illumination type | mold signboard 1 is demonstrated. However, the description of the charge / discharge control device 10 will be omitted because it has been described above with reference to FIG.

  The light guide plate 20 constituting the internal lighting type signboard 1 is a backlight that illuminates an advertisement panel 30 (to be described later) from the back by diffused light generated in a recess formed in the main surface of the light guide plate 20. Such a light guide plate 20 is made of, for example, a methacrylic resin (Polymethylmethacrylate) plate, and is formed from a predetermined plate-like portion so as to be provided adjacent to the main surface of the advertising panel 30. The plate-like portion includes a plurality of concave portions. Is provided by ultrasonic processing or the like. Specifically, the concave portion is formed from a square pyramid-shaped mark having a major axis of 0.6 mm and a depth of 0.4 mm, for example, 2.0 mm with respect to the main surface of the light guide plate 20 formed from a plate-like portion. Are provided in a matrix at intervals of. The light guide plate 20 is fixed in a state of being engaged with an upper plate 41 and a light source 14 of a housing 40 described later. Moreover, for example, advertisement information including a company name may be directly printed and displayed on the light guide plate 20 described above.

  The advertising panel 30 constituting the internal lighting signboard 1 is a diffusion display member, and transmits information including, for example, a company name to the person who viewed the internal lighting signboard 1 by the light illuminated from the light guide plate 20. It is an advertising medium for. Such an advertisement panel 30 is formed by printing predetermined characters on a milk half plate having a diffusion effect. The advertisement panel 30 is disposed so as to be adjacent to both surfaces or one surface of the light guide plate 20. Here, the diffused light emitted from the light guide plate 20 is further diffused by the advertising panel 30 and the bright spots scattered on the surface of the advertising panel 30 become unclear, so that the advertising panel 30 has a uniform light emitting surface. Become. Further, the light guide plate 20 may not be disposed on the internal lighting type signboard 1, and the light source 14 may be provided to face the advertising panel 30 so as to directly illuminate from the rear of the advertising panel 30. The advertisement panel 30 is fixed in a state in which it is engaged with an upper plate 41, a lower plate 43, and a light source 14 of the housing 40 described later.

  The housing 40 constituting the internal lighting type signboard 1 is a fixing member for fixing the solar cell 12, the illuminance meter 16, the light source 14, the light guide plate 20, and the advertisement panel 30. Such a housing 40 is made of, for example, aluminum and is formed in a plate shape, and includes an upper plate 41, a side plate 42, and a lower plate 43. The upper plate 41 is provided on the upper part of the internal lighting type signboard 1 and arranges the solar cell 12 and the illuminance meter 16. The solar cell 12 and the illuminance meter 16 may be disposed on the side plate 42 or the like. The lower plate 43 is provided to face the upper plate 41 and engages and fixes the light source 14, the light guide plate 20, and the advertising panel 30. Further, the side plate 42 is provided so as to shield between the upper plate 41 and the lower plate 43 with which the advertising panel 30 is not engaged. The upper plate 41, the side plate 42, and the lower plate 43 are joined by screwing or the like.

  The support column 50 constituting the internal lighting type signboard 1 is a support member that supports the housing 40. Such a support | pillar 50 consists of stainless steel, for example, for example, is formed from a cylindrical shape. In addition, the control unit 11 of the charge / discharge control device 10, the plurality of batteries 13, and the relay 15 are provided inside the support column 50. Here, a terminal port corresponding to, for example, USB or RS-232C is provided on the side surface of the support column 50, and a personal computer or the like is connected to the terminal port, and the control stored in the control unit 11 of the charge / discharge control device 10 is stored. The program may be changed or the consumption level of the plurality of batteries 13 may be confirmed. Further, a wireless device connected to the charge / discharge control device 10 may be provided inside the support column 50, and the above confirmation may be performed by remote control. In addition, the upper part of the support | pillar 50 is joined by screwing etc. in the center part of the lower board 43 of the housing | casing 40. FIG. Similarly, the lower part of the support column 50 is fixed to a predetermined place where the internally illuminated signboard 1 is installed using a pole fixing bracket, or is embedded and fixed.

  Finally, control for turning on and off the internal lighting type signboard 1 according to the ambient illuminance by the charge / discharge control device 10 will be described with reference to FIGS. 4 and 5.

  Control for turning on and off the internal lighting type signboard 1 will be described first with reference to FIG. In FIG. 4, the control for turning on and off the internal lighting type signboard 1 according to the ambient illuminance by the charge / discharge control device 10 takes time for one day in the morning, day and night on the horizontal axis, and FIG. The vertical axis of Fig. 4 shows the illuminance around the internally illuminated signboard 1, and the vertical axis of Fig. 4B shows the schematic diagram by taking the driving power of the light source 14 provided in the internally illuminated signboard 1. ing. Hereinafter, the control for turning on and off the internal lighting type signboard 1 will be described in order from the left end indicating morning to the right end indicating night on the horizontal axis of FIGS. 4 (a) and 4 (b).

  The time period immediately before t0 to t1 on the horizontal axis in FIG. 4 is different from the season, but shows, for example, from early morning to over sunrise, and the surroundings of the internally illuminated signboard 1 are relatively dark compared to the daytime. For this reason, the illuminance around the internal illumination type signboard 1 measured by the illuminance meter 16 is lower than the threshold value 1 which is a predetermined illuminance value indicated on the vertical axis on the right side of FIG. The threshold value 1 is set to a predetermined value in advance. As described above, in the time zone immediately before t0 to t1 on the horizontal axis in FIG. 4, the surroundings of the internally illuminated signboard 1 are also relatively dark, so that the advertisement panel 30 is identified even if the internally illuminated signboard 1 is somewhat dark. be able to. Therefore, based on the control of the control unit 11, a battery 13 having a low charging rate is selected from a plurality of batteries 13 as shown on the right vertical axis in FIG. It emits light with electric power. In addition, in the right vertical axis | shaft of FIG.4 (b), the battery 13 with a low charging rate is prescribed | regulated as a battery weak as mentioned above.

  The time zone immediately before t1 to t2 on the horizontal axis in FIG. 4 shows the daytime when the illuminance is highest during the day, although it depends on the weather. It is relatively very bright. For this reason, the illuminance around the internal illumination signboard 1 measured by the illuminance meter 16 exceeds the threshold value 1, which is a predetermined illuminance value shown on the right vertical axis of FIG. In this way, in the time zone immediately before t1 to t2 on the horizontal axis in FIG. 4, the surroundings of the internal illumination signboard 1 are relatively bright, so even if the advertising panel 30 of the internal illumination signboard 1 emits light. There is little influence on the discrimination power of the advertisement panel 30. Therefore, based on the control of the control unit 11, the supply of driving power to the light source 14 is stopped as shown in FIG.

  The time period immediately before t2 to t3 on the horizontal axis in FIG. 4 is different from the season, but shows, for example, from noon to the evening, and the surroundings of the internally illuminated signboard 1 are slightly darker than during the daytime. For this reason, the illuminance around the internal illumination type signboard 1 measured by the illuminance meter 16 is lower than the threshold value 1 which is a predetermined illuminance value indicated on the vertical axis on the right side of FIG. However, in the time zone immediately before t2 to t3 on the horizontal axis in FIG. 4, the surroundings of the interior lighting signboard 1 are still quite bright. The panel 30 can be identified. Therefore, based on the control of the control unit 11, a battery 13 having a high charging rate is selected from a plurality of batteries 13 as shown on the right vertical axis in FIG. 4B, and the light source 14 is driven relatively high. It emits light with electric power. In the right vertical axis in FIG. 4B, the battery 13 having a high charging rate as described above is defined as battery strength.

  The time period immediately before t3 to t4 on the horizontal axis in FIG. 4A is different from the season, but shows, for example, from evening to just before sunset, and the surroundings of the internally illuminated signboard 1 are considerably darker than during the daytime. For this reason, the illuminance around the internal illumination type signboard 1 measured by the illuminance meter 16 is below the threshold value 2 which is a predetermined illuminance value shown on the vertical axis on the right side of FIG. Note that the illuminance is lower at the threshold value 2 than at the threshold value 1. In addition, during the time period immediately before t3 to t4 on the horizontal axis in FIG. 4, the surroundings of the interior lighting signboard 1 are considerably dark, so that the advertisement panel 30 of the interior lighting signboard 1 does not emit light strongly. Can be identified. Therefore, based on the control of the control unit 11, the battery 13 having an average charging rate is selected from the plurality of batteries 13 as shown on the vertical axis on the right side of FIG. Note that the vertical axis on the right side of FIG. 4B defines the battery 13 having an average charging rate as described above as being in the battery.

  The time period from t4 to t5 on the horizontal axis in FIG. 4 is different from the season, but shows, for example, after sunset, until midnight, and the surroundings of the internally illuminated signboard 1 are considerably darker than during the daytime. For this reason, the illuminance around the internal illumination type signboard 1 measured by the illuminance meter 16 is lower than the threshold value 3, which is a predetermined illuminance value shown on the right vertical axis of FIG. Note that the illuminance is lower at the threshold 3 than at the threshold 2. Also, during the period from t4 to t5 on the horizontal axis in FIG. 4, since the surroundings of the internally illuminated signboard 1 are considerably dark, the advertisement panel 30 is identified even if the advertisement panel 30 of the internally illuminated signboard 1 is somewhat dark. Can be made. Therefore, based on the control of the control unit 11, a weak battery 13 having a low charging rate is selected from the plurality of batteries 13 as shown on the vertical axis on the right side of FIG. In addition, in the right vertical axis | shaft of FIG.4 (b), the battery 13 with a low charging rate is prescribed | regulated as a battery weak as mentioned above.

  As described in each case for each of the time periods from t0 to t5 on the horizontal axis in FIG. 4, when the illuminance around the interior illumination signboard 1 is high in the interior illumination signboard 1 based on the control of the control unit 11. A battery 13 with a high charging rate is selected from among a plurality of batteries 13, and a battery 13 with a low charging rate is selected when the illuminance around the internally illuminated signboard 1 is low. In the time period from t0 to t5 on the horizontal axis in FIG. 4, the charge / discharge control device 10 selects a plurality of batteries 13 having a low charging rate from a plurality of batteries 13 based on the control of the control unit 11. The electric power generated by the solar battery 12 is charged. 5 (a) and 5 (b) show a decrease in illuminance around the internally illuminated signboard 1 in the time periods of the horizontal axes t2, t3, and t4, compared to FIGS. 4 (a) and 4 (b). The method for selecting the battery 13 and the method for driving the light source 14 are the same as those described above with reference to FIG.

  When all the batteries 13 are in a good charge state, the battery 13 is charged in order from the battery 13 with the lowest charge rate, and the driving power is supplied to the light source 14 in order from the battery 13 with the higher charge rate. Control may be performed. Further, when all of the plurality of batteries 13 are not sufficiently charged, time zone control for driving the light source 14 only from 19:00 to 24:00, for example, with the drive voltage of the light source 14 sufficiently lowered. May be performed. In addition, by connecting a plurality of batteries 13 in parallel and using a plurality of batteries 13 in parallel at the same time, the amount of use of each battery 13 can be evenly suppressed when the sunshine hours are low, such as in winter. good. It should be noted that when a failure such as inability to charge the battery 13 occurs, a notification may be made by blinking a display lamp (not shown) on the internal lighting type sign 1 via the control unit 11. .

  As described above, according to the internal illumination signboard 1 provided with the charge / discharge control device 10, based on the control of the control unit 11, when the illuminance around the internal illumination signboard 1 is high, the charging rate from the plurality of batteries 13 provided. Battery 13 having a low charging rate is selected from a plurality of batteries 13 when the light source 14 is selected to emit light relatively strongly with a high drive voltage and the illuminance around the internally illuminated sign 1 is low. The light source 14 is made to emit light relatively weakly with a low driving voltage. Accordingly, even when the plurality of batteries 13 are charged from the solar battery 12 whose amount of generated power depends on the weather, the driving power is evenly supplied to the light source 14 according to the charging state of each battery 13. Thus, the lifetime of all the batteries 13 can be extended. Further, by appropriately causing the advertising panel 30 provided on the internal illumination signboard 1 to emit light according to the illuminance around the internal illumination signboard 1, it is possible to adjust the time zone and the weather to the person who viewed the internal illumination signboard 1 It is possible to communicate information without stopping.

  Moreover, according to the internal lighting type | formula signboard 1 which provided the charging / discharging control apparatus 10, based on control of the control part 11, it selects in order from the battery 13 with the low charging rate from the battery 13 with which it was equipped, and is generated with the solar cell 12. The charged power is charged. Therefore, even with the solar cell 12 whose amount of power generated depends on the weather, the plurality of batteries 13 can be charged efficiently, and the internal lighting type signboard 1 is prevented from being extinguished due to insufficient charging of the battery 13. .

  In addition, in 1st Embodiment mentioned above, although demonstrated as a structure which provides the charging / discharging control apparatus 10 in the internal illumination type | mold signboard 1, it is not limited to such a form and does not deviate from the summary of this invention. The range can be changed as appropriate. Specifically, the charge / discharge control device 10 may be provided in, for example, a streetlight that illuminates a sidewalk or a clock installed in a park. Moreover, it is good also as a structure which arrange | positions the solar cell 12 and the illuminance meter 16 in the place spaced apart from the internal illumination type | mold signboard 1 without providing in the internal illumination type | formula signboard 1. FIG. The light source 14 is not limited to the LED, and may be a fluorescent tube, a CCFL tube (cold cathode tube), a neon tube, or the like.

DESCRIPTION OF SYMBOLS 1 Internal illumination type | mold signboard 10 Charging / discharging control apparatus 11 Control part 12 Solar cell 13 Battery 14 Light source 15 Relay 16 Illuminance meter 20 Light guide plate 30 Advertising panel 40 Case 41 Upper plate 42 Side plate 43 Lower plate 50 Post

Claims (6)

A solar cell that generates predetermined power from sunlight;
A plurality of storage batteries to which electric power is supplied and charged from the solar cells;
Light emitting means to which driving power is supplied from the plurality of storage batteries;
Selection means for selecting the storage battery supplied with power from the solar battery and the storage battery for supplying driving power to the light emitting means from the plurality of storage batteries;
An illuminometer that measures illuminance around the solar cell or the light emitting means;
Control means for controlling to select the storage battery that supplies driving power to the light emitting means according to the illuminance measured by the illuminometer,
Serial control means selects a high storage battery having a relatively charging rate when the measured in a luminometer illuminance is high before Symbol plurality of storage batteries, said when illuminance is low relative from the plurality of storage batteries The charge / discharge control apparatus is characterized in that the storage battery having a low charging rate is selected and the driving power is supplied to the light emitting means. The said control means selects the said storage battery with a relatively low charge rate from these storage batteries in order, and controls so that the electric power generated by the said solar cell is supplied and charged. Charge-discharge control apparatus as described in. The control means performs control so that driving power is supplied from the plurality of storage batteries to the light emitting means only during a specific time period when all of the charging rates of the plurality of storage batteries are less than a predetermined value. The charge / discharge control apparatus according to claim 1. A solar cell that generates predetermined power from sunlight;
A plurality of storage batteries to which electric power is supplied and charged from the solar cells;
Light emitting means to which driving power is supplied from the plurality of storage batteries;
Selection means for selecting the storage battery supplied with power from the solar battery and the storage battery for supplying driving power to the light emitting means from the plurality of storage batteries;
An illuminometer that measures illuminance around the solar cell or the light emitting means;
Control means for controlling to select the storage battery for supplying driving power to the light emitting means according to the illuminance measured by the illuminometer;
A light guide plate for causing the light from the light emitting means to enter from the end face and generating diffused light in a recess formed in the main surface;
Serial control means selects a high storage battery having a relatively charging rate when the measured in a luminometer illuminance is high before Symbol plurality of storage batteries, said when illuminance is low relative from the plurality of storage batteries The internal lighting type signboard , wherein the storage battery having a low charging rate is selected and driving power is supplied to the light emitting means. A solar cell that generates predetermined power from sunlight;
A plurality of storage batteries to which electric power is supplied and charged from the solar cells;
Light emitting means to which driving power is supplied from the plurality of storage batteries;
Selection means for selecting the storage battery supplied with power from the solar battery and the storage battery for supplying driving power to the light emitting means from the plurality of storage batteries;
An illuminometer that measures illuminance around the solar cell or the light emitting means;
Control means for controlling to select the storage battery for supplying driving power to the light emitting means according to the illuminance measured by the illuminometer;
A diffusion display member that is provided adjacent to the light emitting means and generates diffused light by causing the light of the light emitting means to enter the main surface;
Serial control means selects a high storage battery having a relatively charging rate when the measured in a luminometer illuminance is high before Symbol plurality of storage batteries, said when illuminance is low relative from the plurality of storage batteries The internal lighting type signboard , wherein the storage battery having a low charging rate is selected and driving power is supplied to the light emitting means. A solar cell that generates predetermined power from sunlight;
A plurality of storage batteries to which electric power is supplied and charged from the solar cells;
Light emitting means to which driving power is supplied from the plurality of storage batteries;
Selection means for selecting the storage battery supplied with power from the solar battery and the storage battery for supplying driving power to the light emitting means from the plurality of storage batteries;
An illuminometer that measures illuminance around the solar cell or the light emitting means;
Control means for controlling to select the storage battery for supplying driving power to the light emitting means according to the illuminance measured by the illuminometer;
A light guide plate for causing the light from the light emitting means to be incident from an end face and generating diffused light in a recess formed in the main surface;
A diffusion display member that is provided adjacent to the light guide plate and generates diffused light by causing the diffused light generated by the light guide plate to enter the main surface;
Serial control means selects a high storage battery having a relatively charging rate when the measured in a luminometer illuminance is high before Symbol plurality of storage batteries, said when illuminance is low relative from the plurality of storage batteries The internal lighting type signboard , wherein the storage battery having a low charging rate is selected and driving power is supplied to the light emitting means.