JP2014146446A - Light-emitting device and controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a user of a light-emitting device recognize that the operation environment of the light-emitting device has entered a state that accelerates deterioration of a light-emitting element.SOLUTION: An environmental information detection section 300 detects environmental information of a light-emitting section 100 or environmental information for its surroundings. The environmental information includes temperature, humidity and atmospheric pressure. A control section 200 controls electric power supplied to the light-emitting section 100. Specifically, the control section 200 emits light from the light-emitting section 100 and, when a result of detection performed the environmental information detection section 300 satisfies a criterion, blinks the light-emitting section 100 to have a predetermined non-light-emission period.

Description

  The present invention relates to a light emitting device and a control device.

  One of the light emitting elements is an LED (Light Emitting Diode) or an organic EL element (organic electroluminescence). When these light emitting elements are operated at a high temperature, the deterioration rate is increased.

  On the other hand, Patent Document 1 describes that when the temperature of the light emitting element exceeds the reference, the luminance of the light emitting element is lowered as compared with the case where the temperature is equal to or less than the reference value. Patent Document 1 describes performing lighting driving as one method for reducing the luminance of a light emitting element.

  Further, in Patent Document 2, when the light emission of the light emitting element is controlled using the switching element included in the power conversion circuit, the switching is performed when the temperature of the light emitting element exceeds the reference value as compared with the case where the temperature is lower than the reference value. It is described that the off time of the element is lengthened.

  In Patent Document 3, when a backlight is controlled by a PWM (pulse width modulation) method in a liquid crystal display device, the frequency and its frequency are determined based on a detection result of a temperature sensor installed in the vicinity of the liquid crystal display element. It is described that the duty ratio is controlled. In Patent Document 3, the frequency increases as the detection value of the temperature sensor increases.

Japanese Patent Laying-Open No. 2005-31430 JP 2012-14833 A JP 2009-192881 A

  As described above, the deterioration of the light emitting element is accelerated depending on the operating environment. The present inventor has considered that it is necessary for the user of the light emitting device to recognize that when the operating environment of the light emitting device is in a state of promoting the deterioration of the light emitting element.

  An example of a problem to be solved by the present invention is to make a user of a light emitting device recognize when the operating environment of the light emitting device is in a state of promoting deterioration of the light emitting element.

The invention according to claim 1 is a light emitting unit having a light emitting element;
An environmental information detecting unit for detecting environmental information of the light emitting unit or the surrounding environmental information;
A control unit that causes the light emitting unit to emit light and causes the light emitting unit to blink so as to have a predetermined non-light emitting period when the detection result of the environment information detecting unit satisfies a standard;
It is a light-emitting device provided with.

The invention according to claim 10 is a control device for controlling light emission of the light emitting unit,
The light emitting unit emits light, and when the detection result of the environment information detecting unit that detects the environmental information of the light emitting unit or the surrounding environment information satisfies a standard, the light emitting unit has a predetermined non-light emitting period. It is a control device that blinks.

It is a figure which shows the function structure of the light-emitting device which concerns on embodiment. 3 is a diagram illustrating a functional configuration of a light emitting device according to Example 1. FIG. It is a figure for demonstrating an example of the PWM control by a control part. In Example 2, it is a figure which shows the relationship between the detected value of an environmental information detection part, and the 1st frequency of the 1st signal which a 1st signal generation part outputs. In Example 3, it is a figure which shows the relationship between the detected value of an environmental information detection part, and the 1st frequency of the 1st signal which a 1st signal generation part outputs. 6 is a diagram illustrating a functional configuration of a light emitting device according to Example 4. FIG. It is a figure for demonstrating the example of control of the 2nd signal by a 2nd signal generation part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  In the following description, each component of the light emitting device 10 is not a hardware unit configuration but a functional unit block. Each component of the light emitting device 10 is centered on an arbitrary computer CPU, memory, a program that implements the components shown in the figure loaded in the memory, a storage medium such as a hard disk that stores the program, and a network connection interface. Realized by any combination of hardware and software. There are various modifications of the implementation method and apparatus.

  In the following drawings, the current flow is indicated by a solid line, and the signal flow is indicated by a dotted line.

  FIG. 1 is a diagram illustrating a functional configuration of a light emitting device 10 according to the embodiment. The light emitting device 10 according to the embodiment is, for example, a lighting device or a display, and includes a light emitting unit 100, a control unit 200, and an environment information detecting unit 300. The light emitting unit 100 includes a light emitting element such as an organic EL or LED.

  The environment information detection unit 300 detects the environment information of the light emitting unit 100 or the surrounding environment information. The environmental information indicates the state of factors that affect the deterioration rate of the light emitting element. This factor includes, for example, temperature, humidity, and atmospheric pressure. The environment information detection unit 300 has a sensor, for example. This sensor may be attached to the light emitting unit 100 or may be disposed near the light emitting unit 100.

  The control unit 200 controls the power supplied to the light emitting unit 100. Specifically, the control unit 200 causes the light emitting unit 100 to emit light, and has a predetermined non-light emission period in which the light emitting unit 100 blinks when the detection result of the environment information detection unit 300 satisfies the standard.

  According to the present embodiment, when the detection result of the environment information detection unit 300 satisfies the standard, the control unit 200 causes the light emitting unit 100 to blink so as to have a predetermined non-light emitting period. Thereby, the user can recognize that the operating environment of the light emitting device 10 satisfies the standard, that is, the state where the deterioration of the light emitting element is promoted. In order for the user to recognize that the light of the light emitting device 10 is blinking, it is preferable to blink so as to have the first frequency of 30 Hz or less. However, there is an influence due to individual differences among users, and the frequency of 30 Hz or less is an example, and is not limited thereto.

Example 1
FIG. 2 is a diagram illustrating a functional configuration of the light emitting device 10 according to the first embodiment. The light emitting device 10 according to the present example has the same configuration as the light emitting device 10 shown in the embodiment except for the configuration of the control unit 200.

  The control unit 200 includes a first signal generation unit 210, a second signal generation unit 220, and a current control unit 230. The first signal generation unit 210 generates a first signal having the first frequency described above. The second signal generation unit 220 generates a second signal having a second frequency. The second frequency is higher than the first frequency. The current control unit 230 controls power supplied from the outside and supplies it to the light emitting unit 100. Specifically, the current control unit 230 supplies a current to the light emitting unit 100 when the second signal is a high signal when the detection result of the environment information detection unit 300 does not satisfy the reference. When the detection result of the environment information detection unit 300 satisfies the above-described criteria, the current control unit 230 supplies current to the light emitting unit 100 when both the first signal and the second signal are high signals. Note that the second frequency is, for example, 100 Hz or more, preferably 1 kHz or more.

  Specifically, the current control unit 230 includes an AND circuit and a PWM control circuit. The AND circuit receives the first signal and the second signal as inputs. The PWM control circuit controls on / off of the current according to the output of the AND circuit. The detection value of the environment information detection unit 300 is input to the first signal generation unit 210. The first signal generation unit 210 outputs the first signal when the detection value of the environment information detection unit 300 exceeds the reference value.

  FIG. 3 is a diagram for explaining an example of PWM control by the control unit 200. As described above, the current control unit 230 of the control unit 200 controls the current supplied to the light emitting unit 100 by PWM control.

  Specifically, when the detection value of the environment information detection unit 300 is equal to or less than the reference value, only the second signal is input to the current control unit 230. Therefore, as illustrated in FIG. The on / off of the current is controlled at the second frequency.

  On the other hand, when the detection value of the environment information detection unit 300 exceeds the reference value, both the first signal and the second signal are input to the AND circuit in the current control unit 230. For this reason, as illustrated in FIG. 3B, the current control unit 230 switches between the period in which the light emitting unit 100 emits light and the period in which the light emitting unit 100 does not emit light at the first frequency. While the light emitting unit 100 is caused to emit light, the current control unit 230 switches on / off of current supply at the second frequency.

  As described above, according to the present example, the same effect as the embodiment can be obtained. The current control unit 230 supplies current to the light emitting unit 100 when the detection value of the environment information detection unit 300 is less than or equal to the reference value (that is, when the reference is not satisfied) and the second signal is a high signal. The second frequency is a higher frequency than the first frequency. When the detection result of the environment information detection unit 300 exceeds the reference value (that is, when the reference is satisfied), the current control unit 230 supplies current to the light emitting unit 100 when both the first signal and the second signal are high signals. Supply. For this reason, the light emitting unit 100 can be blinked with a simple circuit when the detection result of the environment information detecting unit 300 exceeds the reference value.

  In addition, since the second frequency of the second signal is 100 Hz or more, when the detection value of the environment information detection unit 300 is less than the reference value, the user of the light emitting device 10 does not recognize that the light emitting unit 100 is blinking. Tesumu.

(Example 2)
The light emitting device 10 according to the second embodiment has the same configuration as the light emitting device 10 according to the first embodiment, except that a plurality of criteria are set when the control unit 200 causes the light emitting unit 100 to blink.

  FIG. 4 is a diagram illustrating the relationship between the detection value of the environment information detection unit 300 and the first frequency of the first signal output from the first signal generation unit 210 in the present embodiment. A plurality of criteria are set for the detection value of the environment information detection unit 300. When the detection value of the environment information detection unit 300 does not reach any reference, the first signal generation unit 210 does not output the first signal to the current control unit 230. When the detection value of the environment information detection unit 300 exceeds the first reference (first reference value), the first signal generation unit 210 outputs the first signal to the current control unit 230. And if the detection value of the environment information detection part 300 exceeds the following reference | standard, the 1st frequency of a 1st signal will be made low. That is, the first signal generation unit 210 changes the value of the first frequency according to the criterion that the detection value of the environment information detection unit 300 satisfies. For example, the first frequency is changed in the order of 30 Hz, 15 Hz, and 7 Hz.

  According to the present embodiment, the same effect as that of the first embodiment can be obtained. In addition, a plurality of reference values are set for the detection value of the environment information detection unit 300, and the value of the first frequency is changed according to the reference satisfied by the detection value of the environment information detection unit 300. Therefore, the user of the light emitting device 10 can recognize how easily the environment of the light emitting element of the light emitting unit 100 is deteriorated.

(Example 3)
The light emitting device 10 according to the third embodiment has the same configuration as that of the light emitting device 10 according to the second embodiment, except for the method of changing the first frequency of the first signal.

  FIG. 5 is a diagram illustrating the relationship between the detection value of the environment information detection unit 300 and the first frequency of the first signal output from the first signal generation unit 210 in the present embodiment. In the present embodiment, the first signal generation unit 210 changes the value of the first frequency according to the difference between the reference and the detection value of the environment information detection unit 300. Specifically, when the detection value of the environment information detection unit 300 does not reach the reference, the first signal generation unit 210 does not output the first signal to the current control unit 230. When the detection value of the environment information detection unit 300 exceeds the reference (reference value), the first signal generation unit 210 outputs the first signal to the current control unit 230. Then, the first signal generation unit 210 lowers the first frequency as the detection value of the environment information detection unit 300 increases. Note that the first frequency may be indicated by a linear function using the detection value of the environment information detection unit 300 as a variable, or may be indicated by a quadratic or higher function.

  According to the present embodiment, the same effect as that of the second embodiment can be obtained.

(Example 4)
FIG. 6 is a diagram illustrating a functional configuration of the light emitting device 10 according to the fourth embodiment. The light emitting device 10 according to this example has the same configuration as the light emitting device 10 according to any one of Examples 1 to 3, except for the following points.

  When the detection value of the environment information detection unit 300 satisfies the standard, the control unit 200 reduces the amount of current supplied to the light emitting unit 100 as compared with the case where the standard does not satisfy the standard. The reference used here is the same as the reference used by the first signal generation unit 210, for example, but may be different (for example, larger). Specifically, the detection value of the environment information detection unit 300 is also input to the second signal generation unit 220. Then, the second signal generation unit 220 controls the amount of current by changing the duty ratio of the second signal based on the input detection value.

  Specifically, as illustrated in FIG. 7, when the input detection value exceeds the reference (that is, when the reference is satisfied), the second signal generation unit 220 reduces the duty ratio of the second signal, The amount of current supplied to the light emitting unit 100 is reduced.

  Also according to the present embodiment, the same effect as any one of the first to third embodiments can be obtained. In addition, when the detection value of the environment information detection unit 300 deteriorates the light emitting unit 100, the control unit 200 reduces the amount of current supplied to the light emitting unit 100. For this reason, the emitted-heat amount of the light emission part 100 can be reduced, As a result, it can suppress that the light emission part 100 deteriorates.

  As mentioned above, although embodiment and the Example were described with reference to drawings, these are illustrations of this invention and can also employ | adopt various structures other than the above.

DESCRIPTION OF SYMBOLS 10 Light-emitting device 100 Light-emitting part 110 Translucent board | substrate 120 1st electrode 122 Auxiliary electrode 130 Partition 140 Organic functional layer 142 Hole injection layer 144 Hole transport layer 146 Light-emitting layer 148 Electron injection layer 150 Second electrode 200 Control part 210 1st 1 signal generation unit 220 2nd signal generation unit 230 Current control unit 300 Environmental information detection unit

Claims (10)

A light emitting unit having a light emitting element;
An environmental information detecting unit for detecting environmental information of the light emitting unit or the surrounding environmental information;
A control unit that causes the light emitting unit to emit light and causes the light emitting unit to blink so as to have a predetermined non-light emitting period when the detection result of the environment information detecting unit satisfies a standard;
A light emitting device comprising: The light-emitting device according to claim 1.
The said control part is a light-emitting device which blinks the said light-emitting part so that it may have a 1st frequency non-light-emission period of 30 Hz or less. The light-emitting device according to claim 2.
The controller is
A first signal generator for generating a first signal having the first frequency;
A second signal generator for generating a second signal having a second frequency that is higher than the first frequency;
When the detection result of the environmental information detection unit does not satisfy the standard, when the second signal is a high signal, current is supplied to the light emitting unit, and when the detection result of the environmental information detection unit satisfies the standard, A current control unit for supplying current to the light emitting unit when both the first signal and the second signal are high signals;
A light emitting device comprising: The light emitting device according to claim 3.
The second signal generation unit is a light emitting device that generates the second signal by a pulse width modulation (PWM) method. The light-emitting device according to claim 3 or 4,
The light emitting device wherein the second frequency is 100 Hz or more. In the light-emitting device as described in any one of Claims 1-5,
The environmental information is a light emitting device which is temperature, humidity, or atmospheric pressure. In the light-emitting device as described in any one of Claims 1-6,
The standard is set in multiple stages,
The said control part is a light-emitting device which changes the value of a said 1st frequency according to the said reference | standard which the said detection result satisfy | filled. In the light-emitting device as described in any one of Claims 1-6,
The control unit is a light emitting device that changes a value of the first frequency according to a difference between the reference and the detection result. The light emitting device according to any one of claims 1 to 8,
The control unit is a light-emitting device that reduces the amount of current supplied to the light-emitting unit when the detection result of the environment information detection unit satisfies the criterion, as compared with the case where the criterion is not satisfied. A control device for controlling light emission of the light emitting unit,
The light emitting unit emits light, and when the detection result of the environment information detecting unit that detects the environmental information of the light emitting unit or the surrounding environment information satisfies a standard, the light emitting unit has a predetermined non-light emitting period. Control device to flash.

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