JP2005215195A - Light emitting apparatus and electronic equipment with light emission apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce variation in light emitting colors between a plurality of light emission modules without causing the complication and size increase of a circuit arrangement and increase in current consumption, etc. <P>SOLUTION: When color mixture light emission is performed by simultaneously driving light emission modules 40L, 40R, the variation in the light emitting colors between the light emission modules is made inconspicuous by devising a light emission pattern. For example, light emission is performed in one color and after that, transited to the color mixture light emission. In addition, when a ratio of color mixture is changed, after fixing light emitting luminance of an LED which emits light in a base color, light emitting luminance of other LEDs is gradually changed and an upper limit is provided in change of the light emission when in the case of gradually changing the light emitting luminance. An upper limit is set to color mixture light emitting time by the same luminance and the whole light emitting period from the start to the end of the color mixture light emission is set shorter as color mixture light emitting time by the same luminance is longer. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a light emitting device that emits two-dimensional mixed color light by simultaneously driving a plurality of sets of light emitting modules including, for example, three light emitting elements of red, blue, and green, and a mobile phone including the light emitting device. The present invention relates to electronic devices such as terminals, personal computers, and audio video players.

  In recent years, for example, in a mobile phone terminal, a model that realizes an illumination function by providing a light emitting device has been developed. For example, a light emitting module having three color LEDs (Light Emitting Diodes) is arranged on the housing surface, and the light emitting module is driven to emit light according to light emission patterns corresponding to various event functions such as incoming call, telephone call, and application execution. In this way, the manufacturer or the telecommunications carrier can differentiate from other models by various illuminations, while the user has an advantage that a plurality of event functions can be visually identified by the illuminations.

  However, in general, light emitting modules have variations in light emission characteristics such as light emission color and light emission luminance among the modules. For this reason, for example, when two-dimensional mixed color light emission is performed using a plurality of light emitting modules, the aesthetics of illumination deteriorates due to variations in the light emission characteristics between the light emitting modules, and the desired illumination expression can be realized. This causes a problem that it becomes difficult to identify events.

On the other hand, as a technique for correcting the variation in luminance between LEDs of the light emitting module, a different driving circuit is provided for each LED (especially for blue LEDs), and the LEDs are individually activated by these different driving circuits, whereby the luminance between the LEDs is increased. Have been proposed (see, for example, Patent Document 1).
JP-A-7-129100

  However, such a conventional correction technique needs to prepare a plurality of different drive circuits, so that the circuit configuration is complicated and large, and the cost of the apparatus is increased. In addition, current consumption increases. This is extremely undesirable for a battery-driven small electronic device such as a mobile phone terminal and the like, which is a major obstacle in reducing the size and weight of the device and reducing the current consumption.

  The present invention has been made paying attention to the above circumstances, and the object of the present invention is to vary the light emission color among a plurality of light emitting modules without increasing the complexity and size of the circuit configuration and increasing the current consumption. It is an object of the present invention to provide a light-emitting device and an electronic device including the light-emitting device that can improve the aesthetics of illumination and maintain high event identifiability.

  In order to achieve the above object, the present invention provides a plurality of sets of light emitting modules each having a plurality of light emitting elements having different emission colors, and light emission for performing two-dimensional mixed color light emission by simultaneously driving the plurality of sets of light emitting modules. In the light emitting device comprising the control unit, in the light emission control unit, when each of the light emitting modules emits mixed color light, the plurality of light emitting elements constituting the light emitting module are sequentially emitted or emitted with a preset time difference. It is controlled to be terminated.

  Therefore, according to the present invention, the emission color changes sequentially from a single color to a mixed color, so that even if the emission characteristics vary among a plurality of light emitting modules, the variation in the emission color between the two modules is inconspicuous. can do. Moreover, since the variation in emission color is reduced by devising the light emission pattern, there is no need to provide a different drive circuit for each light emitting element, thereby increasing the complexity and size of the circuit configuration, increasing costs, and increasing current consumption. There is no worry to invite. This is extremely useful in a battery-driven small electronic device such as a mobile phone terminal.

  Further, according to the present invention, when the color mixture ratio is changed in a state where each light emitting module emits mixed color light, the light emission luminance of the first light emitting element is fixed and the light emission luminance of the second light emitting element is changed stepwise. It is characterized by controlling to make it happen. In this way, since the color mixture ratio when the mixed color light emission is performed, that is, the color tone changes according to a certain rule, the variation in the color tone between the two modules during the mixed color light emission is further increased. It can be inconspicuous.

  In particular, when the emission luminance of the second light emitting element is changed stepwise, if the amount of change per unit time is controlled to be within a preset value, the emission color changes gradually, so Can reduce the sense of incongruity of changes.

  Furthermore, the present invention provides the above-described steady period when each light emitting module is controlled to emit light in accordance with a light emission pattern having a steady period of mixed color light emission at the same brightness and a brightness increasing period and a brightness decreasing period set before and after the steady period. Is set to the first time, the total time of the stationary period, the luminance increasing period and the luminance decreasing period is set to the second time, and the stationary period is set to the third time longer than the first time. When the time is set, the total time of the steady period, the luminance increase period, and the luminance decrease period is set to a fourth time shorter than the second time.

  That is, the light emission pattern is set such that the longer the period of mixed color light emission at the same luminance is, the shorter the entire light emission period from the start to the end of mixed color light emission. When each light emitting module is driven according to such a light emission pattern, if the mixed light emission period with the same luminance is long, the startup increase and decrease period before and after that are shortened and the change in luminance becomes faster. The color variation during the mixed color light emission period can be made inconspicuous.

  In short, in the present invention, when a plurality of light emitting modules emit mixed color light, the plurality of light emitting elements constituting the light emitting module are sequentially emitted or stopped with a predetermined time difference, or the color mixing ratio is changed. The light emission pattern is devised in terms of time and brightness level, such as controlling the light emission brightness of the second light emitting element to be changed stepwise while fixing the light emission brightness of the first light emitting element.

  Therefore, according to the present invention, it is possible to reduce the variation in emission color among a plurality of light emitting modules without increasing the complexity and size of the circuit configuration, increasing the current consumption, etc. It is possible to provide a light-emitting device and an electronic device including the light-emitting device that can maintain high discrimination.

  FIG. 1 is an exploded perspective view showing an appearance of a mobile phone terminal as an embodiment of an electronic apparatus including a light emitting device according to the present invention, and FIG. 2 is a plan view of the mobile phone terminal as viewed from above. This mobile phone terminal is a so-called foldable terminal in which a lower housing 100 and an upper housing 200 are rotatably coupled by a hinge mechanism.

  A U-shaped light guide plate 50 is installed on the back surface of the upper casing 200 of the cellular phone terminal, and light emitting modules 40L and 40R are installed on both ends of the light guide plate 50, respectively. The light emitting modules 40L and 40R are formed by modularizing a red LED, a blue LED, and a green LED as a set. The light guide plate 50 is made of a light guide resin such as polycarbonate or acrylic. Reference numeral 201 denotes a sub-display, 202 denotes a camera, and 300 denotes a back cover made of a translucent material.

FIG. 3 is a block diagram showing a circuit configuration of the mobile phone terminal according to this embodiment.
In the figure, a radio signal transmitted from a base station (not shown) via a radio channel is received by an antenna 1 and then input to a receiving circuit (RX) 3 via an antenna duplexer (DUP) 2. In the receiving circuit 3, the received radio signal is mixed with the reception local oscillation signal output from the frequency synthesizer (SYN) 4 and frequency-converted into a reception intermediate frequency signal. The received intermediate frequency signal is sampled by an analog / digital (A / D) converter 6 including a low-pass filter and then input to a digital demodulation circuit (DEM) 7.

  The digital demodulation circuit 7 performs digital demodulation processing after establishing frame synchronization and bit synchronization for the digital reception intermediate frequency signal. The baseband digital demodulated signal obtained by this demodulation processing is input to a time division multiple access circuit (TDMA) 8, where time slots addressed to itself are separated and extracted for each transmission frame. The frame synchronization and bit synchronization information obtained in the digital demodulation circuit 7 is notified to the control circuit 20.

  The digital demodulated signal output from the TDMA circuit 8 is subsequently input to an error correction code decoding circuit (CH-COD) 9 where error correction decoding processing is performed. This error-correction-decoded digital demodulated signal includes information data such as mail and call voice data depending on the communication mode at that time. Among them, the voice data is input to a voice code decoding circuit (SP-COD) 10 and subjected to voice decoding processing, whereby a digital reception signal is reproduced. The digital reception signal is converted into an analog reception signal by a digital / analog (D / A) converter 11 and then input to a reception amplifier (not shown). After being amplified, the digital reception signal is supplied to a speaker 13 as a receiver and is amplified. Is output. In addition, information data such as received mail and received download data is taken into the control circuit 20, stored in the memory (MEM) 23 by the control circuit 20, decoded, and displayed on the display unit 22.

  On the other hand, the speaker's transmitted voice is collected by the microphone 14 and converted into a transmission signal, further amplified to a predetermined level by a transmission amplifier (not shown), and then input to the A / D converter 12. Then, the A / D converter 19 performs sampling at a predetermined sampling period, thereby converting it into a digital transmission signal comprising a sample pulse train. After the acoustic echo is canceled by an echo canceller (not shown), this digital transmission signal is input to a speech code decoding circuit (SP-COD) 10 where it is speech encoded.

  This voice-encoded digital transmission signal is input to an error correction code decoding circuit (CH-COD) 9 where it is error correction encoded. Also, image data output from the control circuit 20 and information data such as a transmission mail are also input to the error correction code decoding circuit 9 and subjected to error correction encoding. The digital transmission signal output from the error correction code decoding circuit 9 is input to the TDMA circuit 8. The TDMA circuit 8 generates a transmission frame corresponding to a time division multiple access (TDMA) system, and performs processing for inserting the digital transmission signal into a time slot assigned to the own apparatus in the transmission frame. .

  The digital transmission signal output from the TDMA circuit 8 is subsequently input to the digital modulation circuit (MOD) 15. The digital modulation circuit 15 generates a transmission intermediate frequency signal digitally modulated by the digital transmission signal. The transmission intermediate frequency signal is converted into an analog signal by the D / A converter 16 and then transmitted to the transmission circuit (TX) 5. Entered. As a digital modulation method, for example, a π / 4 shift DQPSK (π / 4 shifted, differentially encoded quadrature phase shift keying) method is used.

  In the transmission circuit 5, the modulated transmission intermediate frequency signal is mixed with the transmission local oscillation signal output from the frequency synthesizer 4, and thereby converted into a radio carrier frequency corresponding to the radio communication channel. The transmission radio carrier signal is controlled to a predetermined transmission power level by a transmission power amplifier (not shown) and then transmitted from the antenna 1 to a base station (not shown) via the antenna duplexer 2.

  The key input unit 21 includes various keys necessary for communication such as a call key, an end key, a plurality of function keys, and a dial key. The display 22 uses a liquid crystal display (LCD), for example, and displays display data output from the control circuit 20. The display data includes management data such as a telephone directory and transmission / reception history, and data indicating the operation state of the apparatus, as well as transmission / reception mail and image data. The power supply circuit 18 generates a power supply voltage Vcc necessary for the operation of each circuit of the mobile phone terminal based on the output voltage of the battery 17 composed of a secondary battery.

  The memory 23 is composed of, for example, a RAM or a flash memory, and stores e-mail and download data received from a telephone directory, a communication partner's terminal or an information site, and image data captured by the camera 202 and the like. The memory 23 also stores a plurality of light emission control data for controlling the light emission operation of the light emitting modules 40L and 40R. Each light emission control data corresponds to one of a plurality of event functions provided in the mobile phone terminal. The light emission control data includes module selection data that designates which of the light emitting modules 40L and 40R is to be driven, and light emission control pattern data that designates the light emission luminance and light emission time of each color LED constituting the light emitting modules 40L and 40R. included.

By the way, the light emitting device section is configured as follows. FIG. 4 is a block diagram showing the circuit configuration.
That is, the light emitting device section includes two sets of light emitting modules 40L and 40R, a light emission driving circuit 30, and a light emission control program 20a executed in the control circuit 20. Among these, the light emission drive circuit 30 includes an LED driver IC 31, module selection switches 32L and 32R, and LED selection switches 33r, 33b, and 33g.

  The light emission control program 20 a selectively reads out the light emission control data corresponding to the event function executed in the mobile phone terminal from the memory 23. Then, the module selection data included in the read emission control data is given to the module selection switches 32L and 32R of the emission drive circuit 30, and the luminance control data for each emission color designated by the emission control pattern data is This is given to the LED driver IC 31 for a specified time.

  The module selection switches 32L and 32R are turned on or off according to the given module selection data, thereby selectively operating the light emitting modules 40L and 40R. As a selection form of the light emitting modules 40L and 40R, there are a form in which any one of the light emitting modules 40L and 40R is operated and a form in which both the light emitting modules 40L and 40R are simultaneously operated.

  The LED driver IC 31 selectively supplies light emission drive pulses to the LED selection switches 33r, 33b, and 33g in accordance with the brightness control data given from the control circuit 20, whereby the LEDs of the light emitting modules 40L and 40R are turned on. Lights individually at the specified brightness.

Next, the operation of the light emitting device configured as described above will be described. FIG. 5 is a flowchart showing the control procedure and control contents of the light emission control program 20a.
That is, when an event is started in the mobile phone terminal by executing an application program such as a game, for example, the control circuit 20 proceeds from step 5a to step 5b, and first determines the type of event started. Subsequently, in step 5c, light emission control data corresponding to the determined event type is selectively read out, and module selection data included in the read light emission control data is given to the module selection switches 32L and 32R. As a result, for example, both the module selection switches 32L and 32R are in a conductive state, whereby both the light emitting modules 40L and 40R are in an operable state.

  At the same time, the control circuit 20 starts the light emission control of each color LED as follows according to the light emission control pattern data included in the read light emission control data. That is, first, in step 5d, the phases of the light emission control pattern are sequentially selected, and the luminance control data of the selected phase is output to the LED driver IC 31 (step 5e). Also, the designated time is set in the timer, and the timer is started (step 5f). In step 5g, the time-out is monitored, and when the time-out is detected, the output of the brightness control data is terminated.

  For example, in the first phase No. 1 of the light emission control pattern shown in FIG. 6, luminance control data for causing the blue LED to emit light at the luminance level “20” is output, and a timer is set to 40 msec. Measure time. For this reason, the LED driver IC 31 of the light emission drive circuit 30 supplies the light emission drive pulse whose duty ratio is specified by the luminance control data to the LED selection switch 33b. As a result, the LED selection switch 33b is turned on / off according to the duty ratio of the light emission drive pulse, and the blue LED starts to emit light. When the time measured 40 msec elapses, the output of the brightness control data is stopped and the light emission of the blue LED is stopped. Thus, in the first phase No. 1, only the blue LED emits light for a period of 40 msec at the luminance level “20”.

  Subsequently, when the process proceeds to the second phase No. 2, the control circuit 20 causes the blue LED to emit light at the luminance level “20” and outputs luminance control data for causing the green LED to emit light at the luminance level “4”. And the timer is set to 25msec and time is measured. For this reason, from the LED driver IC 31 of the light emission drive circuit 30, the light emission drive pulse for the blue LED and the light emission drive pulse for the green LED whose duty ratio is specified by the luminance control data are respectively sent to the LED selection switch 33b and the LED selection switch. 33 g. As a result, the LED selection switch 33b and the LED selection switch 33g are turned on / off according to the duty ratio of each light emission drive pulse, whereby the blue LED and the green LED start to emit light. Then, when the time count of 25 msec elapses, the output of the brightness control data is stopped and the light emission of the blue LED and the green LED is stopped. Thus, in the second phase No. 2, the blue LED and the green LED emit mixed color light for a period of 25 msec at the luminance levels “20” and “4”, respectively.

  Similarly, every time the next phase No. 3, No. 4,... Is selected in step 5d, the control circuit 20 designates the brightness control data designated in the phase in steps 5e to 5g. This is given to the LED driver IC 31 for a predetermined time. Therefore, a light emission drive pulse is selectively supplied from the LED driver IC 31 of the light emission drive circuit 30 to the LED selection switches 33b, 33g, and 33r for a designated light emission time. As a result, each color LED has a designated luminance ratio. Single color or mixed color light emission for the time specified in.

  Then, the final phase No. When the light emission control in 19 is finished, the control circuit 20 detects this in step 5h, and finishes a series of light emission control according to the light emission control pattern. If the event continues, the control circuit 20 returns to step 5b and repeatedly executes the light emission control described above.

  By the way, as shown in FIG. 1, No. 1 2, Phase No. 8, no. 9, phase no. 13, no. As shown in FIG. 14, it is set to emit monochromatic light first and then shift to mixed color light emission. Also when the mixed color emission is terminated, the phase No. 6, no. 7, Phase No. 11, no. 12, phase no. 18, no. As shown in FIG. 19, the light emission is set to end once through a single color from the mixed color. For this reason, even if the light emission luminance varies between the light emitting modules 40L and 40R, the light emission color mixing variation between the light emitting modules 40L and 40R can be made inconspicuous.

  When changing the color mixture ratio, the phase No. shown in FIG. 2-No. 6, Phase No. 9-No. 11, phase no. 14-No. As shown in FIG. 18, the light emission luminance of the LED emitting the base color is fixed (“20” in the example of FIG. 6), and the light emission luminance of the other LED is set to change stepwise. Moreover, an upper limit value (“4” in the example of FIG. 6) is set for the amount of change per unit time when the emission luminance is changed stepwise. In this way, the ratio of the color mixture when the mixed color light emission is performed changes gradually and gradually, thereby conspicuous variation in color between the two light emitting modules 40L and 40R during the mixed color light emission. Can be eliminated.

Furthermore, the phase number of FIG. As shown in Fig. 4, the longest color mixing light emission time with the same luminance is set to 100 msec, and the light emission pattern is set so that the total light emission period from the start to the end of the color mixing light emission becomes shorter as the color mixing light emission time with the same luminance becomes longer. doing.
For example, the phase number of FIG. 4 has a long light emission time of 100 msec. 4 including phase no. 2-No. The total length of 6 mixed color emission periods is set within 200 msec. When the light emission time of the same luminance is 80 msec, the total length of the mixed color light emission period including this phase is set within 320 msec.

  On the other hand, the phase No. in FIG. When the light emission time of the same luminance is as short as 60 msec as in FIG. 16 including phase no. 14-No. The total length of the 18 mixed-color light emission periods is set to be as long as 420 msec or less. When the emission time of the same luminance is 40 msec or less, the upper limit of the total length of the mixed color emission period including this phase is set to a longer 520 msec.

  When each of the light emitting modules 40L and 40R is driven according to such a light emission pattern, when the mixed light emission period with the same luminance is long, the startup increase period and the luminance decrease period before and after that are shortened, and the luminance change is accelerated. For this reason, it is possible to make the variation in the tint in the mixed light emission period having the same luminance inconspicuous.

  As described above, in this embodiment, light emission control pattern data having the following functions is created and stored in the memory 23. The light emission control program 20a of the control circuit 20 reads the light emission control pattern data corresponding to the event being executed from the memory 23, and drives and controls the light emission drive circuit 30 according to the read light emission control pattern data. The light emitting modules 40L and 40R emit mixed colors.

(1) When the light emitting modules 40L and 40R are simultaneously driven to emit mixed color light, the light emitting modules 40L and 40R are shifted to mixed color light emission after emitting light in a single color. That is, a time difference is provided between the light emission start timing and the end timing between the LEDs.
(2) When changing the color mixture ratio, fixing the light emission luminance of the LED emitting the base color and changing the light emission luminance of other LEDs stepwise, and changing this stepwise An upper limit is set for the amount of change in luminance.
(3) An upper limit (for example, 100 msec) is set for the mixed color light emission time with the same luminance, and the entire light emission period from the start to the end of the mixed color light emission is set shorter as the mixed color light emission time with the same luminance is longer.

  Therefore, according to this embodiment, even when the light emission luminance varies between the light emitting modules 40L and 40R, the light emission mixed color variation between the light emitting modules 40L and 40R can be made inconspicuous. This is particularly effective when the light guide plate 50 is provided between the light emitting modules 40L and 40R as shown in FIGS. That is, when the light guide plate 50 is used, the light emission of each of the light emitting modules 40L and 40R is not a point light emission but a linear, that is, two-dimensional light emission. For this reason, if there is a variation in light emission luminance between the light emitting modules 40L and 40R, a difference in light emission color due to this variation appears remarkably on the light guide plate, and it is difficult to recognize the light emission color as well as a decrease in aesthetics. However, when the light emission pattern is devised as in the present embodiment and the variation in the light emission color mixture between the light emitting modules 40L and 40R is not noticeable, two-dimensional color mixture light emission using the light guide plate 50 can be performed with high quality. .

  In addition, since the variation in emission color is reduced by devising the light emission pattern, it is not necessary to provide a different drive circuit for each LED, thereby preventing the circuit configuration from becoming complicated and large, increasing costs, and increasing current consumption. it can. This is extremely useful for an electronic device such as a mobile phone terminal in which miniaturization and weight reduction of the terminal and extension of battery life are one of the important issues.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the case where the two light emitting modules 40L and 40R are driven simultaneously has been described as an example. However, the present invention can also be applied to a case where three or more light emitting modules are driven. The number of LEDs constituting the light emitting module may be two of red, blue, and green. Furthermore, in the above-described embodiment, an example was given in which mixed color light emission was performed by sequentially driving two LEDs out of three colors at intervals, but the three colors LEDs were sequentially driven at intervals. Alternatively, mixed color light emission may be performed. In addition to LEDs, lamps, liquid crystals, EL elements, and the like can be used as light emitting elements.

  The light emitting device according to the present invention includes a mobile phone terminal, a fixed telephone terminal, a facsimile terminal, a personal computer, another communication terminal device such as a PDA (Personal Digital Assistants), an in-vehicle electronic device such as a car stereo, and an audio video player. The present invention is also applicable to other electronic devices such as game devices, store sales terminal devices, and advertisement display devices.

  In short, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The disassembled perspective view which shows the external appearance of the mobile telephone terminal which is one Embodiment of the electronic device provided with the light-emitting device concerning this invention. The top view which looked at the mobile telephone terminal shown in FIG. 1 from the top. The block diagram which shows the circuit structure of the mobile telephone terminal shown in FIG. The figure which shows the circuit structure of the light-emitting device part which is the principal part of the mobile telephone terminal shown in FIG. The flowchart which shows the control procedure and control content of the light emission control program with which the mobile telephone terminal shown in FIG. 3 is provided. The figure which shows an example of the light emission control pattern with which the mobile telephone terminal shown in FIG. 3 is provided.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... Antenna duplexer (DUP), 3 ... Reception circuit (RX), 4 ... Frequency synthesizer (SYN), 5 ... Transmission circuit (TX), 6, 12 ... A / D converter, 7 ... Digital Demodulation circuit (DEM), 8 ... Time division multiple access circuit (TDMA), 9 ... Error correction code decoding circuit (CH-COD), 10 ... Speech code decoding circuit (SP-COD), 11, 16 ... D / A conversion 13 ... speaker 14 ... microphone 15 ... digital modulation circuit (MOD) 17 ... battery 18 ... power circuit (POW) 20 ... control circuit 20a ... light emission control program 21 ... input unit 22 ... display , 23 ... Memory (MEM), 30 ... Light emission drive circuit, 31 ... LED driver IC, 32L, 32R ... Module selection switch, 33r, 33b, 33g ... LED selection switch, 4 L, 40R ... light-emitting module, 50 ... light guide plate, 100 ... lower housing, 200 ... upper housing, 300 ... rear panel.

Claims (5)

A plurality of sets of light emitting modules including a plurality of light emitting elements having different emission colors;
A light emission control unit that performs two-dimensional mixed color light emission by simultaneously driving the plurality of sets of light emission modules;
The light emission control unit includes:
A light emitting device characterized in that, when each light emitting module emits mixed color light, a plurality of light emitting elements constituting the light emitting module are sequentially emitted or terminated with a predetermined time difference. The light emission control unit includes:
When the ratio of color mixture is changed in a state where each light emitting module emits mixed color light, the light emission luminance of the first light emitting element is fixed and the light emission luminance of the second light emitting element is changed stepwise. The light-emitting device according to claim 1. The light emission control unit includes:
3. The light emitting device according to claim 2, wherein when the light emission luminance of the second light emitting element is changed in a stepwise manner, the amount of change per unit time is set within a preset value. The light emission control unit includes:
When each light emitting module is controlled to emit light according to a light emission pattern having a steady period of mixed color light emission at the same brightness and a brightness increasing period and a brightness decreasing period set before and after the steady period, the steady period is set to the first period. When the time is set, the total time of the stationary period, the luminance increasing period and the luminance decreasing period is set to the second time, and the stationary period is set to the third time longer than the first time. 4. The method according to claim 1, wherein a total time of the steady period, the luminance increase period, and the luminance decrease period is set to a fourth time shorter than the second time. Light emitting device. An electronic device body that selectively executes a plurality of event functions;
A light emitting device provided in the electronic device body,
The light emitting device
A plurality of sets of light emitting modules including a plurality of light emitting elements having different emission colors;
A light emission control unit for performing two-dimensional mixed color light emission representing the executed event function by simultaneously driving the plurality of light emitting modules according to a light emission pattern corresponding to the event function executed by the electronic device main body. And
The light emission control unit includes:
An electronic apparatus characterized in that when the light emitting modules emit light in mixed colors, a plurality of light emitting elements constituting the light emitting module are provided with a time difference set in advance and light emission is started or stopped in sequence.

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