JPH0227450Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a desk lamp, which is particularly small and whose purpose is to create an atmosphere by changing the color of the emitted light rather than by providing lighting effects. It concerns desk lamps.

[Conventional technology]

Conventionally, this type of small-sized stand has a lamp house 30 formed around an incandescent light bulb using stained glass or the like, as shown in FIG. It was something to enjoy. Due to the power consumption of incandescent light bulbs, the power source is obtained from an AC commercial power source through the power line 31, and depending on the rating of the incandescent light bulb used, for example, a small transformer installed inside the pedestal 32, etc. The voltage is adjusted as appropriate.

(Problem that the invention aims to solve) However, since this type of conventional small desk lamp uses an incandescent lamp as its light source, if a commercial voltage light bulb is used, the size will be large and the size will be reduced. Furthermore, due to the heat generated, there are restrictions on the materials that can be used for the lamp house and pedestal, and even if a small, low-voltage light bulb is used, it is difficult to use batteries due to its large power consumption. It was impossible to use it as a power source, and it had to be connected to the commercial voltage using a small transformer. Connecting to this commercial power source has many interpersonal problems such as electric shock, and material problems such as fire.
These types of small desk lamps are often placed on dining tables, etc., and are therefore more prone to tipping over and flooding than other lighting equipment, which is a major problem that cannot be ignored.

The above problems can be solved by using a light emitting diode as a light source, which can be lit continuously for a long time using batteries, but since the light emitted by the light emitting diode is monochromatic, it is difficult to use a filter such as stained glass. It is impossible to change the color of the emitted light by the action, and a new problem arises in that it is monotonous and lacks decorative effects.

[Means for Solving the Problems] The present invention is a small desk lamp as a specific solution to the above-mentioned problems, and the light source is a plurality of light emitting diodes of different colors, and the light emitting diodes are made of resin or the like. The light-emitting diodes mounted downward have a narrow emission angle, and the light-emitting diodes mounted upward have a wide emission angle.
By providing a small desk lamp that has a control circuit that controls blinking of light-emitting diodes of different colors and is powered by batteries, we can prevent electric shocks, fires, etc. from occurring due to commercial power sources. The problem is solved by using a battery-powered light emitting diode as the light source, and without reducing the decorative effect.

〔Example〕

Next, the present invention will be explained in detail with reference to an illustrated embodiment.

What is shown in FIG. 1 is a small desk lamp according to the present invention. What is indicated by the reference numeral 1 in the figure is a pedestal. The pedestal is provided with a blinking switch 2 as required, and a battery 3 is disposed therein by an appropriate means, and an arm 4 made of, for example, a metal tubular member is attached. It will be done. Although the figure shows a state in which there are two arms 4, this number is not limited and can be arbitrarily changed according to the purpose of design or the like. At the end of the arm 4, a printed circuit board 7 is provided with a plurality of light emitting diodes 5 of different light emitting colors and a resistor 6 for limiting the current flowing through the light emitting diodes.
is attached, and further a lamp house 9 is disposed via a support 8. FIG. 2 shows in more detail the end of the arm 4 on which the lamp house 9 is disposed, and a lead wire 10 is disposed inside the tubular arm 4 and is disposed on the pedestal 1. Power is supplied to the printed circuit board 7 from the installed battery 3. As described above, the light emitting diode 5 attached to the printed circuit board 7 can freely select the color of the light emitted from it, and can also freely select the shape. In the illustrated example,
Light emitting diodes 5a and 5 mounted downward
b has a narrow light emitting angle, and the upwardly mounted light emitting diode 5c has a wide light emitting angle.

As a result, the light emitting diodes 5a and 5b directly project spotlights with different colored lights onto the desk, and the light emitting diode 5c colors the lamp house 9 from the inside with colored light. For example, the lamp house 9 colored in red emits green and yellow projection light, which enhances the decorative effect.

What is shown in FIG. 3 is a circuit diagram of a control circuit 20 that can be added to the small desk lamp of the present invention to further enhance its decorative effect. The light emitting diodes 5 are connected to the output terminals P ₁ , P ₂ , and P ₃ of the microcomputer 21 along with the battery 3 for each color of emitted light via an integrating circuit 22 and an amplifier 23 for removing high frequency components, respectively. and a resistor 6 are connected, and FIG. 4 shows an example of the output waveforms of the output terminals P ₁ , P ₂ , and P ₃ . The emitting color connected to output terminal P ₁ is red, and P ₂
To explain an example in which the emitted light color connected to _P3 is yellow and the emitted light color connected to P3 is green, the emitted light color gradually changes from green to red in interval _t1 , and in interval _t2 . Only the red color gradually changes from red to yellow in section _t3 , which can be expected to produce a further decorative effect.

[Effect of idea]

As explained above, using a light emitting diode as a light source reduces heat generation, making this type of desk lamp even more compact, and also reduces power consumption and makes it possible to run on batteries, thereby reducing fires, electric shocks, etc. This has an excellent effect of preventing accidents, and also uses light emitting diodes that emit light of different colors, and also uses different light emitting angles, and furthermore, controls blinking for each light emitted color. By providing a control unit, a desk lamp that uses a light emitting diode as a light source, which tends to be monotonous and lack decorative effects, has the excellent effect of giving an excellent decorative effect by changing the color, irradiation method, and lighting. shall be.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view of a small desk lamp according to the present invention, FIG. 2 is a sectional view showing the main parts, FIG. 3 is a circuit diagram showing the drive circuit, and FIG.
The figure is a graph showing the output of the drive circuit, and FIG. 5 is a perspective view showing a conventional example. 1...Pedestal, 2...Blinking switch, 3...Battery, 4...Arm, 5...Light emitting diode, 6...
...Resistor, 7...Printed circuit board, 8...Support,
9... Lamp house, 10... Lead wire, 20...
...Drive circuit.

Claims (1)

[Scope of utility model registration request] In a small desk lamp, the light source is a plurality of light emitting diodes emitting light of different colors. The light emitting diode mounted upward has the characteristic of a wide light emitting angle, the light emitting diodes of different light emitting colors have a control circuit that controls blinking for each light emitting color, and the light emitting diode is powered by a battery. Small desk lamp.