WO2013094009A1

WO2013094009A1 - Light-emitting device and method for controlling same

Info

Publication number: WO2013094009A1
Application number: PCT/JP2011/079498
Authority: WO
Inventors: 敏治内田
Original assignee: パイオニア株式会社
Priority date: 2011-12-20
Filing date: 2011-12-20
Publication date: 2013-06-27

Abstract

A light-emitting device, provided with: a light-emitting panel comprising a plurality of light-emitting parts that emit light having mutually different colors; a controller for generating a control command in response to an operation command; and a driver for driving each of the light-emitting parts in accordance with the control command. The controller includes: an operation detector for detecting that the operation command is a rapid change command for a rapid change in the brightness of each of the light-emitting parts; and a command unit for generating, upon the detection of a rapid change command, a control command for controlling the brightness of each of the light-emitting parts according to mutually different brightness-time-change functions so that the color temperature of the light-emitting panel changes at a speed that is different from that of the change in the brightness of each of the light-emitting parts.

Description

Light emitting device and control method thereof

The present invention relates to a light emitting device including a plurality of light emitting units and a control method thereof.

At night, when a person sleeping is awakened by sudden noise, shaking due to an earthquake, etc., the indoor lighting is turned off. However, when the light emitting device is suddenly turned on in a dark room, the eyes in darkness cannot keep up with the change in brightness, and may feel uncomfortable enough to become dazzling and painful.

If the illuminance changes abruptly, such as when the light emitting device is turned on or off, as well as when it is dark or bright, human vision may not be able to follow. A technique is known in which the lighting state of the light emitting device is controlled in accordance with the above so as not to feel glare (see Patent Documents 1 to 5).

Patent Document 1 discloses a technique for controlling the brightness step by step from a lighting operation. Patent Documents 2 and 3 disclose a technique for performing dimming control when ambient illuminance is less than a certain value by an illuminance sensor. Patent Document 4 discloses a technique for dimming control by detecting the presence of a person using a human sensor. Patent Document 5 discloses a technique for controlling light control according to the lighting history of illumination.

Japanese Patent Laid-Open No. 8-05550 JP-A-9-007771 Japanese Patent Laid-Open No. 9-017576 Japanese Patent Laid-Open No. 10-189255 JP 2003-272878 A

However, in the prior art described in the patent document, since the illuminance and luminance of the light emitting device are kept low from the beginning of lighting, it takes time until the illuminance around the user can be recognized by the user, and there is a problem that recognition of the surrounding situation is delayed. there were.

Therefore, an object of the present invention is to provide a light-emitting device that can cope with a delay in response to change in illuminance of human visual characteristics and a control method thereof.

The light emitting device of the present invention drives each of the light emitting units according to the control command and the control unit that issues a control command according to the operation command, the light emitting panel that includes a plurality of light emitting units that emit light with different emission colors. A light emitting device comprising a drive unit,
The controller is
An operation detection unit for detecting that the operation command is a sudden change command for commanding a rapid change in brightness of each of the light emitting units;
When the sudden change command is detected, the luminance of the light emitting units is changed according to different luminance time change functions so that the color temperature of the light emitting panel changes at a different speed from the change of the luminance of the light emitting units. And a command unit that issues a control command to be controlled.

According to the control method of the present invention, a light emitting panel composed of a plurality of light emitting units that emit light with different emission colors, a control unit that issues a control command in accordance with an operation command, and each of the light emitting units in response to the control command are driven. A method of controlling a light emitting device comprising a drive unit,
An operation detection step for detecting that the operation command is a sudden change command for commanding a rapid change in brightness of each of the light emitting units;
When the sudden change command is detected, the luminance of the light emitting units is changed according to different luminance time change functions so that the color temperature of the light emitting panel changes at a different speed from the change of the luminance of the light emitting units. And a command step for issuing a control command to be controlled.

According to the light emitting device having the above configuration and the control method thereof, for example, by changing the color temperature by controlling the light emission luminance of a plurality of colors, it is possible to reduce the dazzling feeling for the user in the dark place. According to the present invention, there is an effect that it is possible to obtain an illuminance that can immediately recognize the surrounding situation by emitting strong red light that is less likely to be dazzling to human eyes immediately after the start of lighting. In addition, since the luminance change is made to follow this quickly in response to the sudden change command and the change in the color temperature is made gentle, a fresh sensation lighting effect can be obtained.

FIG. 1 is a block diagram showing a schematic configuration of a light emitting device according to an embodiment of the present invention. FIG. 2A shows an example of a change in luminance time of an organic electroluminescence element in response to a lighting command for instructing a rapid change in luminance of the organic electroluminescence panel, and FIG. 2B shows a rapid increase in luminance of the organic electroluminescence panel. FIG. 2C shows an example of a change in luminance time of an organic electroluminescence element that responds to a turn-off command that instructs a change, and FIG. FIG. 2D is a graph showing an example of a change in luminance time of an organic electroluminescence element in response to a brightening command for instructing a rapid change in luminance of the organic electroluminescence panel. . FIG. 3 (A) is a graph showing an example of the spectral intensity distribution of organic electroluminescence elements of the three primary colors, and FIG. 3 (B) is white light in the light emission color mixture of the entire organic electroluminescence panel composed of the organic electroluminescence element groups of the three primary colors. It is a graph which shows an example of the relationship between the color temperature of white light when it controls on the conditions with constant brightness | luminance, and the separate luminance change of an organic electroluminescent element. FIG. 4 is a graph showing an example of temporal changes in color temperature and luminance of an organic electroluminescence element in response to a lighting command for the organic electroluminescence panel. FIG. 5 is a flowchart showing the operation of the control unit of the light emitting device according to the embodiment of the present invention. 6 is a partially cutaway plan view of the organic electroluminescence panel of the light emitting device shown in FIG. FIG. 7 is a cross-sectional view taken along line CC in FIG. FIG. 8 is a graph showing an example of the temporal change in color temperature and luminance of the organic electroluminescence element in response to a command to turn off the organic electroluminescence panel.

Hereinafter, as an example of the present invention, for example, a light emitting device using an organic electroluminescence (hereinafter referred to as organic EL) panel as a light emitting panel will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a light emitting device as an embodiment of the present invention. The light emitting device includes a drive unit 12 connected to the control unit 11 and an organic EL panel 13 connected to the drive unit. The light emitting device further includes an illuminance sensor 14, a timer 15, a storage unit 16, and an operation unit 17 connected to the control unit 11.

The organic EL panel 13 is a set of a plurality of red (R) light emitting organic EL elements R, green (G) light emitting organic EL elements G, and blue (B) light emitting organic EL elements B having different light emission colors. A plurality of color light emitting portions.

The control unit 11 includes a microcomputer that includes a CPU, a ROM, a RAM, an internal timer, and the like that execute program codes such as processing procedures for generating various signals including a luminance designation signal, and each of the light emitting elements of the organic EL panel 13. A lighting control routine for controlling brightness and lighting / extinguishing is executed. The control unit 11 generates a luminance designation signal for each color for the organic EL panel 13 and supplies it to the drive unit 12.

The driving unit 12 includes a red driving unit 12R, a green driving unit 12G, and a blue driving unit 12B, which are driving circuits for RGB light emission connected to the organic EL elements R, G, and B of the organic EL panel 13, respectively. Depending on the luminance designation signal supplied from the control unit 11, the red driving unit 12R, the green driving unit 12G, and the blue driving unit 12B are individually supplied to the organic EL elements R, G, and B or for each of the R group, the G group, and the B group. Drive power is supplied to each of them, and each of them is caused to emit light with a designated luminance. In response to the luminance designation signal of each color from the control unit 11, the driving unit 12 emits a light source color (light, etc.) such as white by mixing the light emission of predetermined luminance of the organic EL elements R, G, and B in various lighting modes of the organic EL panel 13. Color). The light color white light is “color temperature” when the chromaticity is on the black body radiation locus indicated by the XYZ color system of the CIE chromaticity diagram, and “correlated color temperature” when the chromaticity is not within that range. (Unit: K (Kelvin)).

The illuminance sensor 14 is provided on the exterior of the light emitting device and detects the illuminance around the device. The illuminance sensor 14 performs A / D conversion on the detected measurement value of illuminance and supplies it to the control unit 11 as illuminance data.

The timer 15 always measures the time and outputs the measured value to the control unit 11 as time data.

The storage unit 16 is constituted by, for example, a semiconductor memory, and in cooperation with the control unit 11, writing and reading of various data such as measurement data of the illuminance sensor 14 and the timer 15, white light toning data, threshold time data are performed. .

The operation unit 17 is a device such as a remote controller including an open / close switch and a wired module attached in the room. The operation unit 17 supplies an operation command such as a lighting command for the light emitting device by the user, a switching to a lighting mode, and a stop command to the control unit 11.

The operation unit 17 can receive operation commands such as a turn-off command, a dark turn command, and a bright turn command in addition to the above-described turn-on command from the user. The lighting command, the extinguishing command, the dark command, and the bright command are sudden change commands that command a rapid change in the luminance of the organic EL panel 13.

In response to the sudden change command, the control unit 11 rapidly changes to the normal luminance of the organic EL panel 13 (total luminance of each color organic EL element group) as shown in FIG. 2 (A), (B), (C) and (D) show the rapid change in luminance of the organic EL panel 13 corresponding to the sudden change command time point t0, for example, the turn-on command, the turn-off command, the dark turn command, and the bright turn command. The change is shown schematically. In FIG. 2, the horizontal axis represents time (t), and the vertical axis represents luminance (I).

When the controller 11 detects such a sudden change command from the operation unit 17, the organic EL elements R, G, and so that the color temperature of the organic EL panel 13 changes at a speed slower than the luminance change of the organic EL panel 13. The toning is controlled in accordance with the luminance time changes of the respective B different luminances.

[Toning]
Next, as an example, the luminance value for each organic EL element in the case where only the color temperature of white light changes due to the light emission color mixture of the R, G, B organic EL element group even if the normal luminance of the entire organic EL panel is constant. An example of toning in the case of using white light toning data will be described. White light toning data is obtained by causing the organic EL elements R, G, and B to emit light at a specific luminance, and various kinds of the organic EL panel 13. This is table data of luminance values (luminance designation signal) for each element sent to the red driving unit 12R, the green driving unit 12G, and the blue driving unit 12B for obtaining white light having a color temperature in a mixed color.

FIG. 3A shows an example of the spectral intensity distribution of the organic EL element of the three primary colors. FIG. 3B shows the color temperature of white light and the individual luminance R (k) of the organic EL element when the luminance of the white light in the mixed light emission of the entire organic EL panel composed of the organic EL element group of the three primary colors is controlled under a constant condition. ), G (k), and B (k) are shown as examples of the relationship. When the organic EL elements R, G, and B of the three primary colors (RGB) to be used adopt the spectrum intensity distribution shown in FIG. 3A (the example calculated by normalizing the maximum value of each spectrum intensity to 1), In order to emit light with constant brightness of white light of the entire panel, as shown in FIG. 3B, the organic EL elements R (k), G (k), G (k), with respect to the color temperature of white light (1500K to 5000K). A set of individual luminances of B (k) is required.

As is clear from the color temperature luminance curves R (k), G (k), and B (k) of the organic EL elements R, G, and B in FIG. EL elements R, G, separate luminance output of B is required ^{^{7000cd / m 2, 3000cd / m}} 2, 10cd / m 2, in order to obtain white light 4500K is 3500cd ^/ m 2, 5000cd ^/ m ² indicates that 2000 cd / m ² is necessary. Therefore, based on the color temperature luminance curves R (k), G (k), and B (k) of the organic EL elements R, G, and B in FIG. From the lowest to the highest, for example, every 100K, the color temperature stages are divided into a plurality of color temperature stages, and the luminance designation signals (color temperature luminance curves R (k), G () for each of the organic EL elements R, G, and B for each color temperature 100K. k) and brightness temperature data at the intersections with B (k)) are prepared in advance. Further, white light toning data, that is, luminance time change R (t), G (t), and B (t) functions are created in advance by associating the temperature rise threshold value Δt for each color temperature of 100K (see FIG. 4). ). Then, the color temperature luminance data and white light toning data are stored in the storage unit 16.

Based on the acquired color temperature luminance data and white light toning data, the control unit 11 sets the luminance value for each of the organic EL elements R, G, and B at a predetermined timing from the lower one of the color temperature steps to the higher one. R (t), G (t), and B (t) are sent to the red drive unit 12R, the green drive unit 12G, and the blue drive unit 12B, respectively. However, the above-described constant white light brightness condition is that the threshold illuminance stored in the storage unit 16 can be easily seen when the user performs a lighting operation, for example, in the normal lighting mode. It is preferable to set the sum of the luminances of the organic EL elements R, G, and B that can usually obtain illuminance. In other words, the control unit 11 maintains the brightness so that the surrounding conditions can be easily visually recognized within the light adaptation period in which a person is likely to feel dazzling as the initial period before the normal lighting mode of the organic EL panel 13. Lights up. The human light adaptation period is, for example, 2 minutes or less, 40 seconds to 1 minute, or the like.

It should be noted that a person's loss of light order is 30 minutes to 1 hour longer than the light adaptation period. Therefore, for example, it is preferable to set a light order loss period in which a person is in a dark place as a designated time (a normal lighting mode start time) that can exhibit an effect of preventing the glare of the person.

The threshold time data is data for designating the time interval (threshold time Δt) of the timing signal for sequentially switching the luminance designation signal from the lower to the higher color temperature of the white light every threshold time. The threshold time data is also stored in the storage unit 16.

The control unit 11 sends luminance designation signals R (t), G (t), and B (t) that define white light having a desired color temperature to the red drive unit 12R, the green drive unit 12G, and the blue drive unit 12B, respectively. The light colors of the organic EL panel 13 are adjusted by controlling the luminance of the organic EL elements R, G, and B. That is, the control unit 11 controls the light color and color temperature of the organic EL panel 13 by individually adjusting the light emission intensity (luminance) of each color organic EL element of the organic EL panel 13, for example, the light bulb color, White light such as daylight is emitted.

For example, FIG. 4 shows changes in the normal luminance L and the normal color temperature Ct (initial color temperature 1500K to Ct = 5000K) of the organic EL panel from the lighting start time t0 to the normal luminance time t1 by the user's operation. The subsequent normal luminance and color temperature are schematically shown. In FIG. 4, the horizontal axis is time (t), the vertical axis (left) is color temperature (K), and the vertical axis (right) is luminance (I). When the control unit 11 detects such a lighting start command from the operation unit 17, the luminances of the organic EL elements R, G, B are changed to different luminance time changes R (t), G (t), B (t). Control independently. The control unit 11 gradually increases the color temperature of the organic EL panel 13 to the normal color temperature Ct at a speed slower than the luminance change while instantaneously increasing the luminance to the normal luminance L of the organic EL panel 13. As an initial period before the normal luminance time t1 of the organic EL panel 13, the control unit 11 maintains the total luminance (normal luminance) of all the organic EL elements R, G, and B while adjusting the color from a light bulb color to a daylight color, for example. Then, the organic EL panel 13 is driven.

[Lighting operation]
Next, as an example, the lighting operation of the light emitting device of the embodiment indoors will be described according to the lighting control flow executed by the control unit 11 shown in FIG.

The control unit 11 first determines whether or not it is a lighting input (lighting switch ON) by a user operation in the operation unit 17 (step S1).

If there is a lighting input in step S1, the control unit 11 stores luminance data (such as normal illuminance) of a predetermined color temperature in the normal lighting mode stored in the storage unit 16, white light toning data in the initial period, a specified time, Threshold time, day / night data, threshold illuminance, and the like are read and captured (step S2).

Next, based on the output of the timer 15, the control unit 11 detects the previous turn-off time (initial value is, for example, the manufacturing date) of the organic EL panel 13 stored in advance in the storage unit 16 and turns on from the turn-off time. The elapsed time up to the start time is calculated and held (step S3).

Next, the control unit 11 acquires illuminance data detected by the illuminance sensor 14 (step S4).

Next, the control unit 11 compares whether or not the elapsed time calculated in step S3 is longer than the specified time stored in advance (step S5).

When the elapsed time is long in step S5, the control unit 11 compares the lighting start time acquired from the timer 15 with the day / night data stored in advance, and determines whether the lighting start time is night (step S6).

When the lighting start time is night (predetermined time) in step S6, the control unit 11 compares the illuminance data detected by the illuminance sensor 14 captured in step S4, that is, the ambient illuminance with the threshold illuminance stored in advance. Then, it is determined whether or not it is low (step S7).

When the ambient illuminance is lower than the threshold illuminance in step S7, the control unit 11 outputs a luminance designation signal for instructing the color temperature of the first stage of the white light toning data captured in step S2 to each color driving unit of the driving unit 12. The organic EL panel 13 is lit at an initial color temperature Ct0 in a state where the color temperature of the organic EL panel 13 is low (for example, 1500 K) (step S8).

After the start of lighting, the control unit 11 determines whether or not a threshold time Δt stored in advance in the storage unit 16 has elapsed (step S9).

If the threshold time has elapsed, the control unit 11 sends luminance designation signals R (t), G (t), and B (t) that indicate the color temperature of the second stage of the white light toning data to the driving units for the respective colors. Then, the color temperature is increased by one step, and the organic EL panel 13 is turned on at the next highest color temperature (for example, 1600 K color temperature) (step S10). Thereafter, the control unit 11 increases the color temperature of the panel by one step each time the threshold time elapses.

Next, the control unit 11 monitors whether or not the user switches from the initial period to the normal lighting mode, that is, inputs an instruction to cancel the initial period (step S11). Note that step S11 and step S1 serve as an operation detection unit of the control unit 11.

If there is no cancel input in step S11, it is determined whether or not the color temperature of the organic EL panel 13 is equal to the value of the predetermined color temperature in the normal lighting mode that has been captured in advance. (Step S12).

If the color temperature of the panel does not reach the predetermined color temperature in the normal lighting mode, the control unit 11 returns to step S9. Note that steps S8, S9, S10, and S12 serve as a command unit of the control unit 11, and the control unit 11 causes the color temperature of the organic EL panel 13 to be slower than the change in luminance of the organic EL panel 13 by the loop of such steps. To change.

When the color temperature of the panel reaches the predetermined color temperature in the normal lighting mode in step S12, the control unit 11 turns on the organic EL panel 13 at the predetermined color temperature as it is (step S13). That is, lighting is continued with normal brightness and chromaticity in the normal lighting mode.

The normal lighting mode is started by turning on / off the lighting each time there is a large number of people entering and exiting the room, for example, when the elapsed time from the previous extinction by the user in step S5 is shorter than the specified time stored in advance. In the case of repetition, or when the person who moves from the outdoors to the daytime in step S6 is often photopic, it is switched when the lighting of the warm color system feels uncomfortable at the time of lighting.

In addition, the normal lighting mode is started when the illuminance detected by the illuminance sensor 14 in step S7 is higher than the threshold illuminance, for example, when outside light is falling from a window in a room during the daytime, or in step S11. Is switched from the initial period to the normal lighting mode.

When it is detected in step S1 that the operation unit 17 has been turned off (switch OFF), the control unit 11 writes the turn-off operation time to the storage unit 16 based on the output of the timer 15 and stores it (step S14). Thereafter, the control unit 11 sends a turn-off command to the drive unit 12 (step S15), stops turning on all the organic EL elements R, G, and B, and turns off the organic EL panel 13.

As described above, the control unit 11 controls the white light of the light-emitting panel according to the elapsed time from the start of lighting. For example, during the light adaptation period (40 seconds to 1 minute), while maintaining the brightness (illuminance), for example, the white light of the organic EL panel 13 is gradually changed from a light bulb color to a daylight color. Can be suppressed.

Even in the light adaptation period, in the light emitting device of the embodiment, the control unit 11 gradually increases the color temperature of the organic EL panel 13 in the normal lighting mode toward the end of the initial period (or changes the color of the organic EL panel 13). Move closer to a cool color). For example, the normal color of the organic EL panel 13 can be a daylight color (a color having a large blue wavelength component), and the color temperature can be about 6500K to 7000K. The white light of the organic EL panel 13 can be gradually changed during the initial period, and the desired white light of the organic EL panel 13 can be obtained without giving a sense of discomfort or discomfort in the illuminance that allows the user to easily recognize the surrounding situation. You can get used to it.

It should be noted that the color temperature and light color of the organic EL panel 13 in the initial lighting mode and the normal lighting mode can be changed according to the user's preference. For example, the color temperature of the organic EL panel 13 and identification data for specifying the user can be associated and stored in the storage unit 16. When the control unit 11 acquires user identification information through the operation unit 17, the control unit 11 lights the organic EL panel 13 at a color temperature corresponding to the acquired identification information. Accordingly, even when the user feels the light color differently, the light color of the organic EL panel 13 can be set according to the user's preference, thereby preventing the user from feeling uncomfortable or uncomfortable. be able to.

According to the embodiment, it is not necessary to change the color temperature in the initial period when it is not always necessary to illuminate cold white light, such as when it is likely to become bright from an early time such as summer, and therefore, it is not necessary to change the color temperature in the initial period. The power can be reduced by setting the time.

[Organic EL panel]
FIG. 6 is a partially cutaway plan view of the organic EL panel 13 viewed from the substrate side direction (panel normal direction z) constituting the light emitting device of the present embodiment. FIG. 7 is a cross-sectional view taken along the line CC in FIG. 6 showing the configuration of the organic EL panel 13.

As shown in FIG. 6, in the organic EL panel 13, different sets of emission colors of the red light-emitting organic EL element R, the green light-emitting organic EL element G, and the blue light-emitting organic EL element B that are juxtaposed in a parallel stripe pattern. Sequentially arranged. That is, the organic EL elements R, G, and B are juxtaposed in the x direction with a constant periodic interval for each emission color.

As shown in FIG. 7, the organic EL panel 13 includes a light-transmitting substrate 20, such as glass and resin, a transparent electrode 30, a bus line 40, an organic layer 50 including a light emitting layer, and a reflective electrode 60. It is constructed by stacking. The organic EL panel 13 is a so-called bottom emission type organic EL panel that takes out light generated in the light emitting layer from the surface of the substrate 20 by applying a voltage between the transparent electrode 30 and the reflective electrode 60. The light extraction surface of the substrate 20 is a flat surface, and the organic EL elements R, G, and B are provided on the surface opposite to the light extraction surface of the substrate 20.

The plurality of transparent electrodes 30 constituting the anode each have a strip shape, extend along the y direction on the substrate 20, and are juxtaposed in parallel with the x direction at regular intervals. Each of the transparent electrodes 30 is made of a metal oxide conductor such as ITO (IndiumＩＴＯTin Oxide) or IZO (Indium Zinc Oxide).

On each end side of the transparent electrode 30, a bus line 40 for supplying a power supply voltage to the transparent electrode 30 is formed extending along the y direction.

An insulating film BK is formed on the bus line 40 of the substrate 20 and the transparent electrode 30. In the insulating film BK, stripe-shaped openings each extending in the y direction are formed. A plurality of banks (partition walls) are formed by providing a plurality of openings on the surface of the insulating film BK. Each of the openings reaches the transparent electrode 30, and the surface of each transparent electrode 30 is in contact with the organic layer 50 at the bottom of the opening.

On the transparent electrode 30 in each opening of the insulating film BK, a hole injection layer 51, a hole transport layer 52,

light emitting layers

53R, 53G, and 53B, an electron transport layer 54, and an electron injection layer 55 are stacked in this order. An organic layer 50 configured as described above is formed. A hole blocking layer may be provided between the light emitting layer and the electron transport layer.

The

light emitting layers

53R, 53G, and 53B are made of a fluorescent organometallic compound that emits red light, green light, and blue light, respectively. The

light emitting layers

53R, 53G, and 53B are juxtaposed in a state of being separated from each other by an insulating film BK (bank). That is, the organic layer 50 forms a plurality of light emitting regions separated by the bank BK. These light emitting regions and the like can be formed by applying and drying droplets of light emitting materials of at least two colors corresponding to the respective light emitting color light emitting layers individually by an ink jet method.

An electron transport layer 54 and an electron injection layer 55 are sequentially formed so as to cover the surfaces of the

light emitting layers

53R, 53G, 53B and the insulating film BK. A strip-like reflective electrode 60 constituting a cathode is formed so as to extend in the x direction so as to cover the surface of the electron injection layer 55. The reflective electrode 60 is made of a metal such as Al or an alloy having a low work function and high reflectivity. The reflective electrode 60 constitutes a light reflecting film. In order to protect the organic EL elements from oxygen and moisture in the atmosphere after the cathode film is formed, a cap made of metal, glass or the like covering all the organic EL elements R, G, B in a nitrogen-substituted glove box ( (Not shown). At this time, a desiccant (not shown) may be attached to the inner wall of the cap. Or you may form the sealing film (not shown) which consists of an organic compound or an inorganic compound so that the whole surface (all the organic EL elements R, G, B) of the organic EL panel 13 may be coat | covered.

In the layer configuration of the organic functional layer such as the light emitting layer described above, it is possible to stack the constituent elements other than the substrate in the reverse order. In any case, the structure of the organic layer and the electrode including the charge transport layer that includes at least the light emitting layer or can also be used is included in the present invention, without being limited to these stacked structures.

In this way, the

light emitting layers

53R, 53G, and 53B that emit red, green, and blue light emission colors are repeatedly arranged in stripes, and the red, green, and blue light is emitted from the surface of the substrate 20 that serves as a light extraction surface. Are mixed at an arbitrary ratio and recognized as a single light source color.

The shape of the stripe organic EL element is an example, and the organic EL element may have a rectangular shape in plan view, the luminance of the element, the number of colors of the element, the mixing ratio of the number of the elements, There is no limitation as long as the light color can be obtained by color mixing by adjusting the matrix arrangement of the elements.

Furthermore, the present invention provides an illumination panel using not only an organic EL panel comprising a light emitting part of an organic EL element as a light emitting panel, but also a light emitting part comprising a light emitting diode comprising a plurality of inorganic EL elements and a plurality of LEDs. It can also be applied to.

In the above example, the case where the lighting start command is used as the operation command to the light emitting device has been described. However, a program, data, or the like can be set for another lighting command, turn-off command, dark turn command, or bright turn command. Thus, the light emitting device can be configured similarly. In the case of the bright rotation command, the color temperature change can be achieved with substantially the same configuration as the case of the lighting start command. Further, for example, in the case of the turn-off start command as the operation command, as shown in FIG. 8, a turn-off period t1 that gradually decreases from the turn-off start time t0 of the normal luminance is provided, and in this turn-off period, the control unit 11 When a command is detected from the operation unit 17 (t0), the luminance of each of the organic EL elements R, G, B is independently controlled according to different luminance time changes R (t), G (t), B (t). Thus, the color temperature of the organic EL panel 13 can be gradually lowered to a predetermined color temperature at a speed faster than the brightness change while the brightness of the organic EL panel 13 is lowered. That is, when the light is turned off, the high color temperature of the organic EL panel 13 can be lowered (the color of the organic EL panel 13 is changed from a cold color to a warm color). For example, the color of the organic EL panel 13 can be gradually changed from a daylight color (a color having a large blue wavelength component) to a light bulb color (a color having a large red wavelength component). In this way, since the luminance change is gradually changed and the color temperature follows faster than that, a fresh feeling extinction effect such as a sense of security due to the color change can be obtained.

Further, also in the case of light reduction, when the control unit 11 detects such a light reduction command from the operation unit 17, the luminances of the organic EL elements R, G, B are different from each other in luminance time changes R (t), G ( t) and B (t) are independently controlled to gradually lower the color temperature of the organic EL panel 13 to a predetermined color temperature at a speed faster than the brightness change while lowering the brightness of the organic EL panel 13. be able to.

Thus, according to the embodiment, the user feels uncomfortable even if the brightness of the organic EL panel 13 changes suddenly before and after the operation by turning off, darkening or brightening while changing the color temperature as well as the lighting operation. Alternatively, it is possible to create a situation where no discomfort is given or a situation where the user is used to the desired white light of the organic EL panel 13.

DESCRIPTION OF SYMBOLS 11 Control part 12 Drive part 13 Organic EL panel 14 Illuminance sensor 15 Timer 16 Memory | storage part 17 Operation part R, G, B Organic EL element 20 Board | substrate 30 Transparent electrode 40 Bus line 50

Organic layer

53R, 53G, 53B Light emitting layer 60 Reflective electrode BK insulation film

Claims

A light-emitting device comprising a light-emitting panel composed of a plurality of light-emitting units that emit light of different colors, a control unit that issues a control command in response to an operation command, and a drive unit that drives each of the light-emitting units in response to the control command Because
The controller is
An operation detection unit for detecting that the operation command is a sudden change command for commanding a rapid change in brightness of each of the light emitting units;
When the sudden change command is detected, the luminance of the light emitting units is changed according to different luminance time change functions so that the color temperature of the light emitting panel changes at a different speed from the change of the luminance of the light emitting units. And a command unit that issues a control command for control.
The light-emitting device according to claim 1, wherein the sudden change command is a turn-on command, a turn-off command, a dark turn command, or a bright turn command.
3. The control unit according to claim 2, wherein when the sudden change command is a lighting command, the control unit gradually changes the color temperature of the light-emitting panel at the start of lighting of the light-emitting panel to a color temperature of normal luminance. The light-emitting device of description.
4. The light emitting device according to claim 3, wherein the command unit issues a control command to immediately set the luminance of each light emitting unit to normal luminance.
The operation detection unit detects that the operation command is a stop command, and when the stop command is detected, the command unit issues a control command to immediately set each luminance of the light emitting unit to normal brightness. The light-emitting device according to claim 3.
An illuminance sensor that detects and outputs illuminance around the light emitting device is further included, and the command unit issues a control command to immediately set the luminance of each of the light emitting units to normal luminance according to the output of the illuminance sensor. The light-emitting device according to claim 3.
4. The timer according to claim 3, further comprising a timer for measuring time, wherein the command unit issues a control command for immediately setting each luminance of the light emitting unit to normal luminance when the time by the timer is a predetermined time. Light-emitting device.
The command unit detects a previous turn-off time of the light-emitting panel based on an output of the timer, calculates an elapsed time from the turn-off time to the turn-on start time, and emits the light when the elapsed time is equal to or longer than a specified time. The light-emitting device according to claim 7, wherein a control command for immediately setting the luminance of each unit to normal luminance is issued.
The light emitting device according to claim 1, wherein the color temperature of the light emitting panel changes at a speed slower than the change in luminance of the light emitting panel.
10. The light emitting device according to claim 9, wherein the initial period is a light adaptation period.
2. The light emitting device according to claim 1, wherein the color temperature of the light emitting panel changes at a speed faster than the change in luminance of the light emitting panel.
The light-emitting device according to claim 1, wherein the light-emitting unit is an organic electroluminescence element.
A light-emitting device comprising a light-emitting panel composed of a plurality of light-emitting units that emit light of different colors, a control unit that issues a control command in response to an operation command, and a drive unit that drives each of the light-emitting units in response to the control command Control method,
An operation detection step for detecting that the operation command is a sudden change command for commanding a rapid change in brightness of each of the light emitting units;
When the sudden change command is detected, the luminance of the light emitting units is changed according to different luminance time change functions so that the color temperature of the light emitting panel changes at a different speed from the change of the luminance of the light emitting units. And a command step for issuing a control command to control the light-emitting device control method.