TWI400008B - Light-emitting device and method for controlling brightness thereof - Google Patents

Description

Light-emitting device and control method thereof

The present invention relates to a light-emitting technique, and more particularly to a light-emitting device and a method of controlling the brightness of light.

The illuminating device is an indispensable electrical device in life. Current lighting devices typically include a lampshade, a light bulb, and a knob switch. Lampshades typically have a fixed configuration. The bulb is disposed in the lamp cover, and the knob switch is coupled to the bulb. When in use, the knob can be used to control the brightness of the bulb.

However, the appearance of such a light-emitting device is relatively simple, and the brightness control mode is monotonous, and the interaction is poor, and the user's intuitive experience cannot be brought.

It is an object of the present invention to provide a light-emitting device and a method of controlling the luminance of the light to improve the absence of the prior art.

The invention discloses a light emitting device. The light emitting device includes a body, a sound source, a receiver, a light emitting member, and a controller. The body is filled with gas. The sound source is disposed in the body for emitting a first sound wave to drive the gas vibration. The receiver is disposed in the body for receiving a second sound wave generated by the vibration of the gas, and identifying the resonance wave from the second sound wave. The illuminating member is disposed in the body. The controller couples the illuminating member and the receiver, and controls the illuminating brightness of the illuminating member according to the frequency of the resonant wave.

The invention also discloses a method for controlling the luminance of a light-emitting device. The light emitting device includes a body and a light emitting member. The body is filled with gas. The control method includes the following steps. A first sound wave is emitted to the body to drive the gas vibration. Receiving a second sound wave generated by gas vibration. The resonance wave is identified from the second sound wave. The luminance of the light-emitting member is controlled according to the frequency of the resonance wave.

The light-emitting device and the method for controlling the brightness of the light provided by the invention apply the resonance phenomenon of the sound wave to detect the volume of the body of the light-emitting device, thereby correspondingly controlling the light-emitting brightness of the light-emitting member according to the volume. Thereby, the user can be intuitively used.

The above and other objects, features, and advantages of the present invention will become more apparent from the description of the appended claims.

1A and 1B are schematic views showing states of a light-emitting device before and after inflation according to an embodiment of the present invention. 2 is a circuit block diagram of a light emitting device in accordance with an embodiment of the present invention. Please refer to FIG. 1A, FIG. 1B and FIG. 2 together.

In the present embodiment, the light-emitting device 1 includes a body 11, a sound source 12, a receiver 13, a light-emitting member 14, a controller 15, a circuit board 16, and a volume control unit 17.

In this embodiment, the volume control unit 17 can be coupled to the body 11 . The circuit board 16 can be disposed within the body 11. The sound source 12, the receiver 13, the light emitting member 14, and the controller 15 may be disposed on the circuit board 16. The circuit board 16 can include a power source 18 to provide operational power to the various components mounted on the circuit board 16. The receiver 13 and the illuminating member 14 can be coupled to the controller 15 via a line (not shown) on the circuit board 16. However, the present invention is not limited thereto.

In the present embodiment, the body 11 includes two parts of a support body 111 and a balloon 112. The support body 111 is a hollow body whose outer shape is, for example, a spherical shape or an ellipsoidal shape, but is not limited thereto. The balloon 112 is sleeved outside the support body 111 and has good ductility. However, the present invention is not limited thereto.

In the present embodiment, the body 11 is filled with a gas, for example, which can be filled with air. Thereby, the volume of the body 11 can vary with the amount of filling gas. Specifically, when the body 11 is not inflated, the balloon 112 will abut against the support 111. At this time, the body 11 has a minimum volume, that is, corresponds to the size of the space formed by the support body 111. When the gas is filled into the body 11, the balloon 112 gradually expands as the gas is filled. At this time, the volume of the body 11 corresponds to the volume of the balloon 112.

In the present embodiment, the volume control unit 17 includes a gas pump 171 and a conduit 172. The duct 172 is connected to the air pump 171 and the body 11, respectively. When the air pump 171 is pressed, the gas enters the body 11 through the conduit 172, and the balloon 112 gradually expands as the charge gas increases. Opening the switch of the air pump 171 can deflate the body 11, and the balloon 112 will shrink as the released gas increases until its volume is equal to the size of the space formed by the support body 111.

In the present embodiment, the catheter 172 can be divided into two parts. The first portion may be a rigid conduit 172a for supporting the body 11. The second part can be a soft conduit 172b that can be bent at will. In the present embodiment, the air pump 171 can be disposed on the soft conduit 172b. In this way, it is ensured that the entire illuminating device 1 has a certain structural strength and a certain flexibility in styling. And by the soft conduit 172b, the user can operate the illumination device 1 at any position. However, the present invention is not limited thereto. In other embodiments, the conduits 172 may also be all rigid conduits or all flexible conduits.

In the present embodiment, the sound source 12 is a sounder for emitting a first sound wave W1 to drive gas vibration in the body 11. The first sound wave W1 may be an ultrasonic wave or an infrasound wave. However, the invention is not limited thereto.

In addition, the frequency of the first acoustic wave W1 may be continuous or discontinuous, and the present invention does not limit this, but should include all natural frequencies corresponding to different volumes that the body 11 can reach. Thereby, when the body 11 is in any one of the volume states, in the first sound wave W1 emitted, there is always a first sound wave W1 having a specific frequency resonating with the gas in the body 11 under the current volume. In the present embodiment, the first acoustic wave W1 has a continuously varying frequency.

In addition, the sound source 12 can also include a plurality of sounders. 3 is a schematic diagram of a sound source in accordance with another embodiment of the present invention. The sound source 22 internally includes a plurality of sounders 221. Each of the sounders 221 emits a third sound wave having a different frequency. The frequency of these third sound waves may be continuous or discontinuous. The invention is not limited thereto.

Please continue to refer to FIG. 1A, FIG. 1B and FIG. In the present embodiment, the receiver 13 is for receiving the second sound wave W2 generated by the gas vibration in the body 11 and identifying a resonance wave (not shown) from the second sound wave W2. The frequency of the resonant wave depends on the natural frequency of the body 11. The natural frequency varies with the volume of the body 11, i.e., the amount of gas filled in the body 11.

Specifically, when the sound source 12 emits the first sound wave W1, the gas in the body 11 vibrates under the driving of the first sound wave W1 to generate the second sound wave W2.

In this embodiment, since the first sound wave W1 has a continuously varying frequency, at a certain moment, when the frequency of the first sound wave W1 is equal to the natural frequency of the body 11, the first sound wave W1 and the current volume of the body 11 The gas contained in it resonates. At this time, the second sound wave W2 received by the receiver 13 is a resonance wave in a resonance state. When the volume of the body 11 changes, the state point at which the first sound wave W1 resonates with the gas in the body 11 also changes. Thereby, the state of the resonance wave corresponding to the second sound wave W2 received by the receiver 13 is different at different resonance state points. That is, the frequency of the resonance wave changes as the volume of the body 11 changes.

In the present embodiment, since the resonance wave is the second sound wave W2 in the resonance state, its amplitude is much larger than the second sound wave W2 of the other frequency which is not in the resonance state. Thereby, the receiver 13 can internally include a determination program for identifying the resonance wave from the received second sound wave W2 according to the magnitude of the amplitude, and transmitting the corresponding frequency value to the controller 15.

In this embodiment, the controller 15 may be a single chip, but is not limited thereto. The controller 15 controls the luminance of the light-emitting member 14 according to the internal preset program with the frequency of the resonance wave as a parameter. Thereby, the luminance of the light-emitting member 14 varies with the volume of the body 11. The light-emitting member 14 is, for example, an LED lamp, but is not limited thereto.

4 is a flow chart showing a method of controlling the luminance of a light-emitting device according to an embodiment of the present invention. Please refer to FIG. 1A, FIG. 1B and FIG. 4 together. The method for controlling the luminance of the light-emitting device of the present invention comprises the following steps.

In step S310, the amount of gas filled in the body 11 is controlled. In the present embodiment, the volume control unit 17 can be used to control the amount of gas filled in the body 11.

Specifically, when it is desired to increase the luminance of the light, the user can press the air pump 171 to inflate the body 11 through the catheter 172. The balloon 112 gradually expands as the filling gas increases. For example, it can be gradually changed from the state shown in FIG. 1A to the state shown in FIG. 1B. At this time, the luminance of the light-emitting device 1 also increases. The principle of this process is detailed later.

Conversely, when it is desired to reduce the luminance of the light, the user can turn on the air pump 171 to deflate the body 11. At this time, the luminance of the light is weakened as the volume of the body 11 is reduced.

In step S320, the first acoustic wave W1 is emitted into the body 11 to drive the gas vibration filled in the body 11.

In the present embodiment, when the sound source 12 is a sounder, it can uninterruptly emit the first sound wave W1 having a different frequency. In the present embodiment, the frequency of the first acoustic wave W1 is continuously changed, but the invention is not limited thereto, and in other embodiments, it may also be discontinuous.

In other embodiments, when the sound source 22 includes a plurality of sounders 221 (as shown in FIG. 3), the sounders 221 can respectively emit third sound waves having different frequencies. These sounders 221 can simultaneously emit these third sound waves, but are not limited thereto, and these third sound waves can also be sequentially emitted in chronological order.

In the present embodiment, under the driving of the first acoustic wave W1, the gas filled in the body 11 is subjected to forced vibration.

In step S330, the second acoustic wave W2 generated by the gas vibration is received. In the present embodiment, after the gas filled in the body 11 vibrates, the receiver 13 receives the second sound wave W2 generated by the gas vibration.

In step S340, the resonance wave is identified from the second sound wave W2. In the present embodiment, the receiver 13 recognizes the resonance wave in the resonance state from the second sound wave W2.

Specifically, the natural frequency of the body 11 varies with the amount of gas filled therein. For example, in the state shown in FIG. 1A, it is assumed that the volume of the body 11 is V1 at this time, and the corresponding natural frequency is f1; in the state shown in FIG. 1B, it is assumed that the volume of the body 11 is V2 at this time. , then its corresponding natural frequency is f2.

In the present embodiment, when the frequency value of the first sound wave W1 having the varying frequency is equal to the natural frequency value of the body 11 under the current volume, the first sound wave W1 is filled with the gas filled in the body 11. Resonance occurs. At this time, the second sound wave W2 received by the receiver 13 is a resonance wave. Since the natural frequency of the body 11 in a specific volume is unique, the state point at which the first sound wave W1 resonates with the gas filled in the body 11 under the corresponding volume is also unique.

For example, in the state shown in FIG. 1A, when the frequency value of the first acoustic wave W1 changes to the natural frequency value f1 of the body 11 under the current volume, the first acoustic wave W1 may be generated with the gas filled in the body 11. Resonance. In the state shown in FIG. 1B, when the frequency value of the first sound wave W1 changes to the natural frequency value f2 of the body 11 under the current volume, the first sound wave W1 resonates with the gas filled in the body 11.

Generally, when the gas filled in the body 11 vibrates under the driving of the first acoustic wave W1, the amplitude is small, and when it resonates with the first acoustic wave W1, its amplitude reaches a maximum value. Therefore, the receiver 13 can recognize the resonance wave from a series of second sound waves W2 according to such characteristics. However, the present invention is not limited thereto. The receiver 13 can also identify the resonant wave by other means. In addition, in other embodiments, the process of identifying the resonant wave can also be accomplished by the controller 15.

In step S350, the pulse duty ratio corresponding to the frequency of the resonance wave is calculated.

In the present embodiment, the receiver 13 converts the frequency of the recognized resonance wave into a voltage signal and transmits it to the controller 15. The controller 15 calculates the pulse duty ratio corresponding to the voltage signal according to an internal program. Specifically, a comparison table can be stored in the controller 15. This comparison table reflects the relationship between the pulse duty cycle and the voltage signal. Thereby, the controller 15 can use the look-up table to obtain the pulse duty ratio under the corresponding voltage signal. Alternatively, the controller 15 may directly calculate the pulse duty ratio under the corresponding voltage signal by means of a functional relationship. The invention is not limited thereto.

In step S360, the luminance of the light-emitting member 14 is controlled in accordance with the pulse duty ratio.

Specifically, in this embodiment, the controller 15 can issue a corresponding pulse signal to the negative pole of the illuminating member 14 according to the calculated pulse duty ratio to control the portion of the illuminating member 14 within one period of the pulse signal. The time is in the "lighted" state, and the rest of the time is in the "off" state. Since the human eye cannot distinguish frequencies exceeding 25 Hz, as long as this period is less than 0.04 s, the visual persistence of the human eye can be utilized, so that the illuminance of the illuminating member 14 appears to be continuous. Moreover, by controlling different pulse duty ratios, the human eye can feel different luminances of illumination. For example, when the pulse duty ratio is 0.8, the human eye will perceive that the luminance of the light-emitting member 14 is greater than the luminance of the light when the pulse duty ratio is 0.3.

In summary, the illuminating device provided by the embodiment of the present invention has a larger body volume than the previous illuminating device having a fixed shape, and thus can provide a better visual effect. Moreover, the embodiment of the present invention applies the resonance phenomenon of the acoustic wave to detect the volume change of the body of the light-emitting device, thereby correspondingly controlling the light-emitting brightness of the light-emitting member according to the volume change. Thereby, the user can be intuitively used.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention is subject to the definition of the scope of the patent application.

1. . . Illuminating device

11. . . Ontology

111. . . Support

112. . . balloon

12, 22. . . Sound source

13. . . receiver

14. . . Light-emitting parts

15. . . Controller

16. . . Circuit board

17. . . Volume control unit

171. . . air pump

172. . . catheter

172a. . . Hard conduit

172b. . . Soft conduit

18. . . power supply

221. . . Sounder

S310～S360. . . step

W1. . . First sound wave

W2. . . Second sound wave

1A and 1B are schematic views showing states of a light-emitting device before and after inflation according to an embodiment of the present invention.

2 is a circuit block diagram of a light emitting device in accordance with an embodiment of the present invention.

3 is a schematic diagram of a sound source in accordance with another embodiment of the present invention.

4 is a flow chart showing a method of controlling the luminance of a light-emitting device according to an embodiment of the present invention.

S310～S360. . . step

Claims (9)

A light-emitting device includes: a body filled with a gas; a sound source disposed in the body for emitting a first sound wave to drive the gas vibration; and a receiver disposed in the body Receiving a second sound wave generated by the vibration of the gas, and identifying a resonance wave from the second sound wave; a light emitting member disposed in the body; and a controller coupling the light emitting member and the receiver, The controller controls the luminance of the light emitting member according to the frequency of the resonant wave. The illuminating device of claim 1, wherein the first sound wave emitted by the sound source has a continuously varying frequency. The illuminating device of claim 1, wherein the sound source comprises a plurality of sounders respectively emitting third sound waves having different frequencies to form the first sound waves. The illuminating device of claim 1, further comprising a volume control unit coupled to the body for controlling the amount of gas filled in the body. The illuminating device of claim 4, wherein the volume control unit comprises an air pump and a conduit connected to the air pump and the body, and the body is filled with the gas by operating the air pump. A method for controlling the brightness of a light-emitting device, the light-emitting device comprising a body and a light-emitting member, the body filled with a gas, the control method comprising the steps of: emitting a first sound wave to the body to drive the gas vibration; Receiving a second sound wave generated by the vibration of the gas; identifying a resonance wave from the second sound wave; and controlling a light-emitting brightness of the light-emitting member according to a frequency of the resonant wave. The control method of claim 6, wherein the first sound wave has a continuously varying frequency. The control method of claim 6, wherein the step of controlling the luminance of the light-emitting member according to the frequency of the resonance wave comprises: calculating a pulse duty ratio corresponding to the frequency of the resonance wave; and accounting according to the pulse The air ratio controls the luminance of the light-emitting member. The control method of claim 6, further comprising: controlling the amount of gas filled in the body.