JP3082719U - LED lamp - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To change a light amount to a non-linear type with a small and inexpensive controller
Provided is an LED lamp capable of changing the color tone. A plurality of light emitting dies as light sources of an LED lamp (1) are provided.
Aether 3₁, 3_Two, 3_ThreeConnected in parallel to each other
Connection circuit 7₁ , 7_Two , 7_ThreeAnd the change in applied voltage
A voltage is applied to these connection circuits in a stepwise manner.
Multiple voltage gates 8 connected₁, 8_Two, 8_ThreeSwitching consisting of
Circuit 6 is provided. Light-emitting die that lights up when the applied voltage changes
Aether 3₁, 3_Two, 3_ThreeThe number of light emitting diodes
Mode 3₁, 3 _Two, 3_ThreeAre the same color, the LED lamp 1
The light amount changes stepwise, and the plurality of light emitting diodes 3₁,
3_Two, 3_ThreeIf is a different color, the color tone changes.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an LED lamp with a built-in dimming and color tone changing mechanism that can change the amount of light and color tone.

[0002]

[Prior art]

 When dimming and changing the color tone of an LED lamp, it had to have a control part as a control device for the LED lamp. There is a dedicated LED lamp driver IC for that purpose. Even for LED lamps equipped with light emitting diodes of three primary colors used for full-color displays and the like, in order to perform toning and color change, an extremely expensive LED lamp driver must be prepared.

[0003]

[Problems to be solved by the invention]

 In the above-mentioned conventional example, an expensive LED lamp controller and driver had to be prepared, and it could not be used cost-effectively for interior lighting and amusement display.

When the LED lamp is formed of a base with a base like a light bulb, the base has only two-terminal electrodes, and in order to change the color tone with the two-terminal electrode lamp, the applied voltage must be changed. A signal for controlling the lighting of the light-emitting diode must be provided and a control circuit for analyzing the signal inside the LED lamp must be provided, resulting in a very high cost. Normally, in the case of three primary colors, it is necessary to input four terminals to the input terminal of the LED lamp. If this problem is not solved at the same time, it must be easily installed and used, and cannot be used for general interior lighting and amusement.

[0005] Therefore, it is considered that dimming and color tone can be changed by a change in applied voltage by a voltage changer of a variable transformer (Slidac, etc.) which can be installed easily and inexpensively. It is an object of the present invention to provide a possible LED lamp.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is directed to an LED lamp using a light emitting diode as a light source, and a plurality of connecting circuits individually connected to these light emitting diodes, and to these connecting circuits according to changes in applied voltage. A switching circuit for sequentially applying a voltage in a stepwise manner, thereby changing the lighting quantity of the light emitting diodes or changing the color tone by the color mixture of the light emitting diodes. Such a switching circuit can be simply configured by connecting a plurality of voltage gates in series and connecting the connection circuits to the output side of each voltage gate.

[0007] According to the present invention, the number of light-emitting diodes that are turned on by stepwise voltage application to a plurality of connection circuits due to a change in applied voltage changes stepwise. If each connection circuit is configured to keep the current supplied to each light-emitting diode through each connection circuit constant, when a light-emitting diode of the same color is used, the light-emitting diode changes due to a change in applied voltage. The number of lighting of the mode changes stepwise, and when a light emitting diode of a different color is used, the color tone changes stepwise due to the color mixture due to the change in the applied voltage.

In the case where light-emitting diodes of different colors are used, each connection circuit is configured to change a current supplied to each light-emitting diode via each connection circuit at a predetermined ratio according to a voltage applied to each connection circuit. If this is done, the color tone can be changed continuously by changing the applied voltage.If light emitting diodes of the same color are used, the resistance values of the resistors provided in each connection circuit should be different from each other. In addition, the amount of light can be changed in a polygonal line by changing the applied voltage.

Here, the control device comprising the connection circuit and the switching circuit of the present invention is small and can be housed in the LED lamp unit, and a light bulb can be housed in the base or the connector, and the cost is low. Become cheap.

[0010]

[Embodiment of the invention]

Referring to FIG. 1, 2 is a LED lamp body, a plurality in the body 2, for example, (hereinafter referred to as LED) 3 light emitting diodes 3 _1, 3 _2, 3 ₃ houses the LED La 1 is constituted.

With reference to FIG. 2, a voltage V applied to the LED lamp 1 is variable by a voltage changer 4 composed of a variable transformer or the like. that the switching circuit 6, the plurality of LED 3 _1, 3 _2, 3 connected circuit 7 ₁ a plurality of individually connected to ₃ (three in the illustrated example), 7 _2, 7 ₃ LED 3 ₁ via the 3 It is to be energized to _2, 3 _3.

[0012] The switching circuit 6, a voltage gate 8 _1, 8 _2, 8 ₃ are constituted by serially connecting a first voltage gate ₈₁ of a plurality consisting constant voltage diode (three in the illustrated example) the first connection circuit _71, the second connection circuit 7 ₂ to the second output of the voltage gate ₈₂ of the third connection circuit 7 ₃ the third output side of the voltage gate 8 ₃ husband output s Connected. First, second and third voltage gate 8 _1, 8 _2, 8 ₃ setting voltage (blur Kudaun voltage of the constant voltage diode) and respectively V1, V2, V3, applied voltage V is V1 or V1 + V2 or less first voltage connection circuit ₇₁ is applied when a voltage is applied the applied voltage V is V1 + V 2 or V1 + V2 + V3 or less when the first connection circuit 7 ₁ and the second connection circuit 7 _2, the applied voltage V There is a voltage applied to V1 + V2 + V3 or when the first connection circuit 7 ₁ and the second connection circuit 7, _second and third connection circuit 7 _3.

The first to third connection circuits 7 ₁ , 7 ₂ , 7 ₃ are supplied to the LEDs 3 ₁ , 3 ₂ , 3 ₃ via the connection circuits 7 ₁ , 7 ₂ , 7 ₃ , respectively. The first to third constant current diodes 9 ₁ , 9 ₂ , and 9 ₃ are provided as constant current elements for keeping a constant current. Therefore, assuming that the set currents of the first to third constant current diodes 9 ₁ , 9 ₂ , and 9 ₃ are I1, I2, and I3, respectively, when the applied voltage V becomes equal to or higher than V1, the line a1 in FIG. first LED 3 ₁ current of I1 flows as shown, when the applied voltage V is equal to or higher than V1 + V2, the second LED 3 ₂ current of I2 flows as indicated by b1 line in FIG. 4, applied voltage V is when it becomes V1 + V2 + V3 or more, the third LE D3 ₁ as shown by c1 line in FIG. 4, 3 _2, 3 ₃ I3 current.

Therefore, if the plurality of LEDs 3 ₁ , 3 ₂ , 3 ₃ have the same color, the number of lighting of the LEDs, that is, the light quantity of the LED lamp 1 changes stepwise by adjusting the applied voltage by the dimming controller 4. . If the plurality of LEDs 3 ₁ , 3 ₂ , 3 ₃ have different colors, the number of colors to be lit increases due to the change in the applied voltage, and the visual color tone changes stepwise as a result of addition and mixing. For example, the first LED 3 ₁ red, the second LED 3 ₂ green, the third LED 3 _1, 3 _2, 3 ₃ is a blue, if I1 = I2 = I3, the applied voltage V is V1 or higher It emits red light when V1 + V2 or less, and when the applied voltage V is V1 + V2 or more and V1 + V2 + V3 or less, it becomes green and visually turns yellow. When the applied voltage V is V1 + V2 + V3 or more, it becomes blue and visually white. Changes to

As shown in FIG. 3, resistors 10 ₁ , 10 ₂ , and 10 ₃ may be provided in the first to third connection circuits 7 ₁ , 7 ₂ , and 7 ₃ . According to this, shown in each line of each LED 3 _1, 3 _2, 3 ₃ current respective LED 3 _1, 3 _2, 3 a2 of the _third lighting voltage diagram with increasing applied voltage at zone 4, b2, c2 increases with a predetermined change rate as a continuous LED3 _{1, 3 2,} 3 3 red as the color of the green, when a blue, with the applied voltage increases red, orange, yellow, yellow green, white Change. Various color tones can be visually created by setting the number of voltage gates. Although not all the tones of the three primary colors of light cannot be expressed in red, green, and blue, according to the above-described embodiment, a certain degree of color tone change can be expressed by a simple device, which is advantageous. .

The switching circuit 6 and the connection circuits 7 ₁ , 7 ₂ , and 7 ₃ can be configured to be small and inexpensive using a constant voltage diode and a constant current diode or a resistor. Then, it can hold a switching circuit 6 and the connection circuit 7 _1, 7 _2, 7 ₃ including a rectifying circuit 5 to the base 2a and connector of the LED lamp 1. Therefore, a large-scale control system is not required, and the light amount can be changed in a non-linear manner or the color tone can be changed only by adjusting the applied voltage by the ordinary voltage changer 4. The LED lamp 1 in which the amount of light can be changed in a non-linear manner can be effectively used for a display requiring a change in brightness, such as a railway operation display, an aircraft operation display, and a guide light of a theater. In addition, the LED lamp 1 in which the color tone can be changed can be effectively used for interior lighting, amusement display, and lighting. Furthermore, it can be used for simple power supply monitoring while using the same indicator light. That is, it is possible to easily manufacture a power supply monitoring light that shines white when operating at a normal voltage, changes from yellow-green to orange when the voltage drops, and turns red when the voltage drops to a dangerous area.

[0017]

[Effect of the invention]

 As is clear from the above description, according to the present invention, it is possible to obtain an LED lamp capable of changing the amount of light in a non-linear manner or changing the color tone without using a large-scale control system. It is advantageous.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of the present invention LED lamp.

FIG. 2 is a circuit diagram showing an example of a control circuit of the LED lamp of the present invention.

FIG. 3 is a circuit diagram showing another embodiment of the control circuit.

FIG. 4 is a graph showing voltage-current characteristics by the control circuits of FIGS. 2 and 3;

[Explanation of symbols]

1 ... LED lamp 3 _1, 3 _2, 3 ₃ ... light emitting diodes 6 ... switching circuit 7 _1, 7 _2, 7 ₃ ... connection circuit 8 _1, 8 _2, 8 ₃ ... voltage gate 9 _1, 9 _2, 9 ₃ ... Constant current diodes 10 ₁ , 10 ₂ ,
10 ₃ … Resistor

Claims (4)

[Utility model registration claims] 1. An LED lamp using a light emitting diode as a light source, a plurality of connection circuits individually connected to the light emitting diodes, and a voltage applied to these connection circuits in a stepwise manner in accordance with a change in applied voltage. And a switching circuit for changing a lighting quantity of the light emitting diodes or a color tone by mixing colors of the light emitting diodes. 2. The LED according to claim 1, wherein the switching circuit comprises a circuit in which a plurality of voltage gates are connected in series, and the connection circuits are connected to the output side of each of the voltage gates. lamp. 3. The LED lamp according to claim 1, wherein the connection circuit is configured to maintain a constant current supplied to the light emitting diode via the connection circuit. 4. The connection circuit according to claim 1, wherein a current supplied to the light emitting diode via the connection circuit is changed at a predetermined ratio according to a voltage applied to the connection circuit. The LE according to claim 1 or 2,
D lamp.