JP3122174B2 - Variable color discharge lamp lighting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp of a plurality of luminescent colors, which emits mixed light of each luminescent color, and adjusts the quantity of each luminescent color to produce a desired mixed color. The present invention relates to a variable color discharge lamp lighting device obtained by the above method.

[0002]

2. Description of the Related Art In recent years, there has been a demand for lighting for producing a living scene and making a living environment more comfortable. In order to respond to such a demand, a variable color temperature of an illumination color is adjusted. Color lighting devices are being considered. For example, even in the case of white light, if the color temperature is adjusted according to the temperature, a cool feeling or a warm feeling can be obtained. As a method of adjusting the illumination color, a method has been considered in which a light source of a plurality of luminescent colors is provided, illuminated with mixed light, and the color temperature is changed by changing the ratio of the amount of light of each luminescent color. Such a method has the advantages that the illumination color can be changed and the color rendering properties can be improved.

As a configuration for obtaining a desired illumination color by using the mixed light of a plurality of emission colors as described above, as shown in FIG. of the discharge lamp 6 _R, 6 _G, provided 6 _B as a light source, a discharge lamp 6 _R, mixed light of the light output from the 6 _G, 6 _B constitutes the light emitting portion 7 to emit, the discharge lamps 6 _R , 6 _G , and 6 _B are conceived as variable color discharge lamp lighting devices in which the light output is separately adjusted. Dimming control of each of the discharge lamps 6 _R , 6 _G , 6 _B is performed by lighting control devices 5 _R , 5 _G , 5 _B provided separately. Each of the lighting control devices 5 _R , 5 _G , 5 _B is supplied with power from a power source 1 such as a commercial AC power source, receives the toning signal output from the toning signal generating unit 4 a, and discharges the lamps 6 _R , 6 _G , 6 _G , 6 _G. 6
Set the dimming level of _B separately. The amount of light emitted from each of the discharge lamps 6 _R , 6 _G , 6 _B for obtaining a desired illumination color with a desired amount of light is preset as light amount data in a mixing ratio setting unit 3 a having a ROM or the like. When the desired illumination color and the desired light amount are selected by the unit 2, the corresponding light amount data is read out from the mixing ratio setting unit 3a and input to the toning signal generation unit 4a. Based on the data, a toning signal that can control the output power of each of the lighting control devices 5 _R , 5 _G , and 5 _B is generated.

In the above configuration, when the power supply 1 is turned on, light amount data corresponding to the setting state of the color selection unit 2 is read out from the mixing ratio setting unit 3 and a toning signal generation signal is generated in accordance with the light amount data. The dimming level of each lighting control device 5 _R , 5 _G , 5 _B is set by the toning signal output from the unit 4 a. In this way, each of the discharge lamps 6 _R , 6 _G , 6 _B is lit with the specified light emission amount, and the mixed color light emitted from the light emitting unit 7 becomes the illumination color selected by the color selection unit 2. .

[0005]

However, when a plurality of discharge lamps 6 _R , 6 _G , 6 _B are used as described above, each discharge lamp 6 _R , 6 _G , 6 _B has a different operating characteristic. Since the dimming levels of the discharge lamps 6 _R , 6 _G , and 6 _B are different from each other, the starting conditions and the preheating conditions do not match, and as shown in FIG. Light 6 _R ,
The time to 6 _G, 6 _B reaches the desired light quantity, a light amount of in which variations occur (Fig. 11 (a) (b) ( c) , respectively discharge lamp 6 _R is 6 _G, 6 _B The relationship with the passage of time is shown). Further, even if the operating characteristics of the discharge lamps 6 _R , 6 _G , 6 _B are the same, the starting voltage and the preheating conditions do not always match due to variations during manufacturing.

[0006] Due to the above-mentioned variation in time,
For example, as shown in FIG. 11, the time from power T ₁
When There has elapsed, the red discharge lamp 6 _R will light, then, when the discharge lamp 6 _B green discharge lamp 6 _G and blue-violet lights in the order, the time T ₂ from power has passed, Assuming that all of the discharge lamps 6 _R , 6 _G , 6 _B have reached the desired light amounts, the light color obtained from the light emitting section 7 becomes unstable during the period between time T ₁ and time T ₂ . In the example shown in FIG. 11, red is first seen, and for a short time, light of a color completely different from the desired illumination color is emitted, so that there is no visual impairment. There is a problem of causing pleasure.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a variable color light source that does not cause visual discomfort even if the rise time of the amount of light at the start of each emission color varies. An object of the present invention is to provide a discharge lamp lighting device.

[0008]

According to the present invention, in order to achieve the above-mentioned object, a light-emitting section having a plurality of discharge lamps for emitting light and emitting mixed-color light of each emission color, and adjusting the amount of light of each emission color are provided. Dimming control means for controlling the power supplied to the discharge lamp so as to obtain a desired amount of mixed color light with a desired amount of light, and the light output of each emission color is set by the dimming control means for a certain time from the start. This is provided with start-up control means for setting the output to be lower than the light amount.

[0009]

According to the above arrangement, the starting control means provides:
Since the output is set lower than the set amount of light for a certain period of time from start, even if the rise time of the amount of light of each emission color varies at the start of the discharge lamp, the change of mixed color light is almost inconspicuous. This can prevent the occurrence of a general discomfort.

[0010]

【Example】

(Embodiment 1) The main difference between the present embodiment and the conventional configuration of FIG. 10 is that a timer 8 for performing a time limit for a fixed time after power-on is added to the conventional configuration of FIG. Further, instead of the mixing ratio setting section 3a and the toning signal generation section 4a, the same function is realized by the address setting section 3 and the toning signal generation section 4.

The toning signal generator 4 includes a memory 41 for storing light amount data such as a ROM or a RAM, and one of the memories 41.
A counter 42 for designating the lower 7 bits of the 4-bit address, and a buffer 43 for temporarily holding the light amount data read from the memory 41 are provided. The memory 41 has 14-bit address input terminals A _{0 to} A
₁₄ and 3-bit data output terminals D _{0 to} D ₂ . The memory 41 stores 3-bit data for each address.
Set to the data corresponding to _R, 6 _G, 6 _B. In the memory 41, each 1 designated by the upper 7 bits of the address
A set of light quantity data for setting the light color and light quantity is stored in the block of 28 addresses. Also, of the two blocks having the same 6 bits excluding the most significant bit among the 7 most significant bits of the address, the block whose most significant bit of the address is 1 has the light color selected by the color selector 2 and Light amount data corresponding to the light amount is stored,
The block in which the most significant bit of the address is 0 stores light amount data in which the light amount is set to be small. Thus, the 6-bit address data inputted to the address input terminal A ₇ to A _12, the light color and the light amount 64
You can set it as you want. For example, the address input terminal A ₇ to A _12, (000001) address data toning signal corresponding to the inputted purple is output as, (000010) When the address data is input that the color temperature is 5000K of It is set so that a toning signal corresponding to white is output.

The lower 7 bits store a set of light quantity data.
Specify the address within the block. Each block of the memory 41
Lock light quantity data is, for example,
In addition, (111) (111) (110) (100)
Address where the stored data is 1
Is specified, the data output terminal D₀~ D_TwoThe corresponding
The output of the unit goes high. That is, the lower 7 bits
Counter 4 for counting the rise of the clock signal ck
2 output terminal Q₁~ Q₈Is the lower 7 bits of the memory 41
Address input terminal A₀~ A₆Connected to each other
Run repeatedly between 0 and 127 depending on the output of
(Ie, count from 0 to 127)
Operation to count again from 0 to 127
If 1 and H level correspond,
In the light amount data described above, each data output terminal D₀~ D_TwoFrom
(HHLL ...) (HHHL ...) (HHHH
......) will be obtained. Therefore,
Each data output terminal D₀~ D _TwoFrom as shown in FIG.
, A time corresponding to 128 clock signals is defined as one period τ.
A toning signal, which is a pulse signal, is output.
During the ON period of the signal, the data in each block of the memory 41 is
Is set by the number of ones in a row
is there. Here, the buffer 43 is used during the on-period of the toning signal.
It is provided to keep the signal at H level.

The address setting unit 3 is used to specify address of a memory 41 in which light amount data corresponding to the light color and light amount selected by the color selection unit 2 are stored, and to input address data to address input terminals A _{7 to} A ₁₂ . Which is constituted by a predetermined table. by the way,
The timer 8 is configured such that when the power is turned on, the output is set to the H level after the output is set to the L level for a certain time T ₀ , and this output is input to the address input terminal A ₁₄ of the most significant bit of the memory 41. ing. Here, the H level corresponds to 1, and the fixed time T ₀ after the power is turned on is:
Since the light amount data in the area where the most significant bit of the address is 0 is selected, as shown in FIG. 2, for a certain time T ₀ after the power is turned on, the light amount is smaller than the light amount specified by the color selection unit 2 (for example, 20% light intensity) for each discharge lamp 6 _R , 6 _G ,
6 _B will light up. Here, FIGS. 2A and 2B
(C) shows the lapse of the light amount of each of the discharge lamps 6 _R , 6 _G , and 6 _B , respectively. After a lapse of a predetermined time T ₀ from the power-on, the light quantity data in the area where the most significant bit of the address is 1 is selected, so that the desired light color and the desired light quantity specified by the color selection unit 2 are obtained. Each lighting control device 5
_R, 5 _G, 5 _B is controlled, the discharge lamps 6 _R, 6 _G, 6 _B
Is set. As described above, the lighting control devices 5 _R , 5 _G , and 5 _B constitute dimming control means, and the toning signal generation unit 3 and the timer 8 constitute start-up control means.

For example, the lighting control devices 5 _R , 5 _G , and 5 _B are configured so that the light output of the discharge lamps 6 _R , 6 _G , and 6 _B increases as the on-duty of the toning signal decreases. Data is set as follows.

[0015]

[Table 1]

In the case of Table 1, a fixed time T
_{After 0} elapses, the total discharge lamps 6 _R , 6 _G , and 6 _B become 100
% Lighting, and a fixed time T ₀ after power-on
Until the above, each of the discharge lamps 6 _R , 6 _G , 6 _B is set to the dimming level of 20%. Here, the discharge lamps 6 _R , 6 _G , and 6 _B include:
When a commercially available color lamp FLR40ER, EG, EB is used, a white color having a color temperature of about 6500K is obtained. Thus, a predetermined time T ₀ after power-on, dimming by setting the light output to a low output by lowering the level, without a change in color is conspicuous when the conventional way power-on, the light color Discomfort is reduced even if it changes. When a certain time T ₀ has elapsed since the power was turned on, each discharge lamp 6 _R ,
Since 6 _G and 6 _B have the predetermined light amount at the same time, the transition of light colors is smooth, and no discomfort occurs at this time.

[0017] (Example 2) This example, as shown in FIG. 4, instead of providing the timer 8, the counter for a predetermined time T ₀ from the power-toning signal generator 4 to the time limit 4
4 is provided. Memory 41 includes a 19-bit address input terminal A ₀ to A _18. The upper 6 bits correspond to the address input terminals A _{7 to} A ₁₂ of the first embodiment, and designate a block that stores light amount data corresponding to the light amount and light color selected by the color selection unit 2. Also,
The counter 42 is the same as the counter 42 of the first embodiment, and the lower 7-bit address input terminal A _{0 of the} memory 41 is used.
The input to to A ₆ in which are scanned synchronously with a clock signal ck. Counter 44 sequentially increases the address data inputted in synchronization with a clock signal to the address input terminal A ₇ to A _12, and is configured to stop counting and counts 0 to 63.

When the power supply 1 is turned on, two counters 4
2 and 44 start counting the clock signal ck, and the toning signal generator 4 outputs the toning signal as shown in FIG. 3, but since the address data is updated by the counter 44, The output toning signal is also updated. That is, by providing the counter 44,
The toning signal can be updated in 64 steps from power-on. This configuration makes it possible to change the toning signal in 64 steps during the time T ₀ from power-on to the count of the counter 44 expires.

For example, as shown in FIG.
Time T₀Between each discharge lamp 6_R, 6 _G, 6_BNext light intensity
First, the light amount data is set so as to be increased (see FIG. 5).
(A), (b) and (c) are discharge lamps 6 respectively._R, 6_G, 6_B
This indicates the lapse of the light amount of the power supply), and as shown in FIG.
Fixed time t after entering₁Is after the light output is set to a certain low output
And time t_TwoCan gradually increase the light output during
(Figures (a), (b) and (c) in Fig. 6 are discharge lamps, respectively.
6_R, 6_G, 6_BShows the lapse of time of the light amount of. like this
If the light amount data is created, the light color
The change is less noticeable and is visually uncomfortable as in Example 1.
The feeling can be prevented. Other configurations and operations are examples.
Same as 1.

(Embodiment 3) In this embodiment, an initial dimming level generation circuit 45, an AND circuit 46, and OR circuits 47 _R , 47 _G , and 47 are provided in the toning signal generation section 3 in the configuration of the first embodiment.
_B is added, and the memory 41 has a configuration having 12-bit address input terminals A _{0 to} A ₁₂ . That is, in the first embodiment, the most significant bit of the memory 41 is 1
And the light quantity data at the time of turning on the power and the light quantity data after a lapse of a certain period of time from the power on are stored in the area where the most significant bit is 0 and the area where the most significant bit is 0.
The memory 41 stores only light amount data after a lapse of a predetermined time from power-on. Further, the lighting control device 5 is integrated so as to control the three discharge lamps 6 _R , 6 _G , 6 _B.

The discharge lamps 6 _R , 6 _R
Data for setting the light output from _G and _6B to a low output is generated from an initial dimming level generation circuit 45. The timer 8 is operated for a predetermined time T ₀ after the power is turned on.
The output is set to H level, and then the output is set to L level. FIG. 8 shows signals corresponding to the respective parts a to e in FIG. Initial dimming level generation circuit 45
From has outputs a pulse signal as shown in FIG. 8a, a period of predetermined time T ₀ from power output of the timer 8 is only in a period which is at the H level, as shown in FIG. 8b, the AND circuit 46 Will pass. Here, the on-duty of the toning signal to the lighting control device 5 increases as the dimming level decreases, and the toning signal output from the initial dimming level generation circuit 45 is output from the buffer 43. The on-duty is set to be larger than the toning signal to be performed. Therefore, the OR circuits 47 _R , 4
When the logical sum of the output of the buffer 43 and the output of the AND circuit 46 is obtained by 7 _G and 47 _B , the output of the buffer 43 is masked and, as shown in FIGS.
6 is output with priority. After a predetermined time T ₀ from power has elapsed, the output of the timer 8 is at the L level, since the output of the AND circuit 46 becomes L level, as shown in FIG. 8C～e, OR circuits 47 _R, 47 _G ,
The output of the 47 _B becomes the output of the buffer 43. As described above, as shown in FIG. 9, a predetermined time from power T ₀
Can set the light output of each of the discharge lamps 6 _R , 6 _G , 6 _B to the presentation power, and thereafter, the light color and the light amount selected by the color selection unit 2 can be obtained. Other configurations and operations are the same as those of the first embodiment.

In each of the above embodiments, the lighting control devices 5 _R , 5 _G , and 5 _B may be any of low-frequency AC lighting, high-frequency lighting, and DC lighting, as in the first and second embodiments. The discharge lamps 6 _R , 6 _G , and 6 _B may be independent of each other, or may be integrated as in the third embodiment. As a method of controlling the light amount, a method based on the on-duty of the pulse signal has been described. However, a method of controlling by a DC voltage level signal or a phase control signal, and further, a discharge lamp 6 _R , 6 _G , 6 _B by a pulse signal. May be directly intermittent. As the discharge lamps 6 _R , 6 _G , and 6 _B , ones having different emission colors are provided one by one. However, a plurality of discharge lamps having the same emission color may be provided. A type having a discharge path and having a different emission color for each discharge path may be used. In addition, the discharge lamp 6
Power consumption of the _R, 6 _G, 6 _B may not be identical, as the form to obtain the desired emission color, in addition to those with different types of phosphors, also obtained by setting the light emission color by a color filter Good.

[0023]

As described above, according to the present invention, a light emitting section having a plurality of discharge colors of discharge lamps and emitting mixed color light of each emission color, and adjusting a light quantity of each emission color to obtain a desired mixed light. Dimming control means that controls the power supplied to the discharge lamp so that it can be obtained with the amount of light, and the light output of each luminescent color is set to a lower output than the light quantity set by the dimming control means for a certain time from the start Starting time control means for setting the output to be lower than the set light amount for a certain period of time from the start by the starting time control means. Even if the rise time varies, the change in the mixed color light is hardly noticeable, and there is an effect that visual discomfort can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of a first embodiment.

FIG. 2 is an operation explanatory diagram of the first embodiment.

FIG. 3 is an operation explanatory diagram of the first embodiment.

FIG. 4 is a block diagram of a second embodiment.

FIG. 5 is an explanatory diagram of an operation example of the second embodiment.

FIG. 6 is an explanatory diagram of another operation example of the second embodiment.

FIG. 7 is a block diagram of a third embodiment.

FIG. 8 is an operation explanatory diagram of the third embodiment.

FIG. 9 is an operation explanatory diagram of the third embodiment.

FIG. 10 is a block diagram of a conventional example.

FIG. 11 is an operation explanatory diagram of a conventional example.

[Explanation of symbols]

Reference Signs List 1 power supply 2 color selection unit 3 address setting unit 4 toning signal generation unit _5R , _5G , _5B lighting control device _6R , _6G , _6B discharge lamp 7 light emitting unit 8 timer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05B 41/36

Claims (1)

(57) [Claims] 1. A light emitting unit having a discharge lamp of a plurality of emission colors and emitting mixed light of each emission color, and a light emission unit for adjusting a light amount of each emission color so as to obtain a desired light amount of a mixed color light. Light control control means for controlling the power supplied to the lamp, and start-up control means for setting the light output of each luminescent color to a lower output than the light amount set by the light control means for a fixed time from the start. And a variable color discharge lamp lighting device.