JPH0710347Y2 - Projection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a projection device, and more particularly to a projection device that can be used for various purposes such as time display, guide display, and warning light.

[Prior art and its problems]

Various devices utilizing light such as a flashlight, an alarm lamp, a guide light, a slide projector, etc. are known. However, these devices have only a single function, and one device cannot fulfill these functions. Therefore, these are not economical because they need to be purchased individually, and there is an inconvenience that extra space is required when not in use.

Recently, a large number of devices have been used which are provided with various types of liquid crystal display elements (LCD), such as a clock dial and a word processor display panel. However, these have the drawback that the image formed on the display panel cannot be identified in the dark. Also, since the IC and the light emitting diode provided inside have different optimal operating voltages,
Separate power supplies are inconvenient to handle, and using part of a series-connected battery as a low-voltage source results in an unbalanced consumption of batteries, which is also inconvenient to handle. there were.

[Means for solving problems]

The present invention is, for example, a warning light for notifying the following vehicle of the location when traveling on the road by bicycle at night, a guidance display for guiding the location of the digestive apparatus provided in a hotel corridor, etc. An object of the present invention is to provide a projection device that can be used in combination with a timepiece that can be projected, and that prevents an overvoltage from being applied to the IC provided inside with a simple circuit configuration and that also provides a sufficient amount of light from the light emitting diode. By inserting a liquid crystal display element between the light-transmitting hole provided in the main body and the light-emitting element provided opposite to the light-transmitting hole, the time display can be projected and the light can be emitted. Also provides a projection device that can be operated with a single power source without difficulty.

〔Example〕

 Embodiments will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an internal mechanism of a projection device according to the present invention, and FIG. 2 is a front view thereof. In the figure, a projection device 1 has a main body 2 formed in a case shape.
A transparent hole 3 is formed in the front wall of the. A lens 4 is provided in the light-transmitting hole 3 by fitting a peripheral portion thereof into a groove provided in the main body 2.

Further, inside the rear side of the main body 2 facing the light transmitting hole 3, a light emitting element 5 serving as a light source has a collar portion fitted in a groove formed in the main body 2 similarly to the lens 4. It is fixed. Between the light emitting element 5 and the lens 4, a liquid crystal display element 6 formed in a substantially transparent plate shape when no power is supplied is provided between two supporting walls extending from the side wall in the main body 2. It is fitted and held. In addition, the support wall,
A hole is provided so that light from the light emitting element 5 is transmitted to the light transmitting hole 3. Further, the lens 4 may be provided with a simple transparent plate.

On the other hand, a slide switch 7 for controlling an electronic circuit, which will be described later, is slidably provided on the upper wall in the drawing of the main body 2, and the slide switch 7 is connected to a substrate 8 on which an electronic circuit, which will be described later, is formed. I am doing it. Also, the slide switch 7 will be described later on the right side in the drawing.
There are time adjusters 9a and 9b for controlling the clock function of IC14,
The time adjusters 9a, 9b have a convex cross section and are made of soft plastic or the like, and when a circuit board on the substrate 8 is pressed from the outside by attaching conductive rubber to the end portion facing the substrate 8 side. It is short-circuited, so that it sends a pulse to IC14.

In the figure inside the main body 2, a battery 10 is used as a power source in the lower part.
a and 10b are connected and stored in series, and are connected to the substrate 8 through electrodes 11a and 11b. The dry batteries 10a and 10b can be replaced by opening a lid 12 slidably provided on the main body 2.

FIG. 3 is a block diagram of an electronic circuit formed on the substrate 8. In the figure, one input terminal of the NOR gate 13-1 is grounded via a resistor R ₁ and is connected to the contact T ₄ of the slide switch 7, and the other input terminal is a resistor R ₂ and a resistor R ₃
Are connected in series to the output terminal of the NOR gate 13-1. Further, one end of the capacitor C ₁ is connected to the connection portion between the resistor R ₂ and the resistor R _3, and the other end is connected to the output terminal of the NOR gate 13-2. Further, both input terminals of the NOR gate 13-2 are both connected to the output terminal of the NOR gate 13-1, the NOR gate 13-2 operates as an inverter, and the oscillation circuit operates in cooperation with the NOR gate 13-1. I am configuring. The base of the switching transistor TR, which is responsible for the blinking of the light emitting diode described later, is connected to the output terminal of the NOR gate 13-1 via a resistor R ₄ , and the emitter and collector are the contacts T ₃ and T of the slide switch 7. Connected to ₅ respectively. The contact T ₅ is connected to the cathode of the light emitting diode LD used as the light emitting element 5 and one end of the capacitor C ₂ via the resistor R ₅ , and the anode of the light emitting diode LD and the other end of the capacitor C ₂ are grounded. Has been done. As the light emitting diode LD, a red high brightness light emitting diode can be preferably used.

The contact T ₃ is commonly connected to the contacts T ₂ and T ₁ , and
Is connected to the negative side electrode 11a of the battery, and the resistor R ₆ and the cathode and the capacitor C ₂ of the light emitting diode LD as well as connected to the negative terminal of the electrode 11a further through the resistor R ₆ is IC14 It is connected to the connection site. That is, the capacitor C ₂ and the light emitting diode LD are connected in parallel between the battery terminals of the IC 14. The positive electrode 11b of the dry battery is grounded. The contact of the slide switch 7 is selected by moving the jumper J.

Further, the IC 14 is connected with a crystal oscillator X that plays a reference frequency for obtaining a clock signal, the liquid crystal display element 6 and the like. The capacitors C ₃ and C ₄ are used to adjust the oscillation frequency obtained by the crystal unit. Further, the IC 14 and the liquid crystal display element 6 are connected by a flexible substrate.

The IC14 mainly serves a clock function, but instead of or in addition to the clock function, for example, a character such as "digestive organ" or an appropriate illustration is revealed on the liquid crystal display element. In some cases, it may be configured to allow.

Next, the operation of the electronic circuit will be described. When the jumper J of the slide switch 7 is in a state where the contacts T ₁ and T ₃ are short-circuited, the input terminal connected to the contact T ₄ of the NOR gate 13-1 is "1", and thus the NOR gate 13-1 Since the output terminal is "0", the switching transistor TR is kept in the cutoff state. Therefore, since no current flows through the light emitting diode LD, the light emitting diode LD remains in the off state. During that time, since the IC 14 is supplied with power via the resistor R ₆ , the clock function is operating.

Next, when the slide switch is operated and the jumper J shorts the contacts T ₂ and T ₄ , the input terminal of the NOR gate 13-1 connected to the contact T ₄ is “0”.
become. As a result, the output terminal of the NOR gate 13-1 turns to "1" to bring the switching transistor TR into conduction. Therefore, the light emitting diode LD is turned on. On the other hand, almost simultaneously with the output terminal of the NOR gate 13-1 turning to "1", the output terminal of the NOR gate 13-2 also changes from "1" to "0".
Therefore, the capacitor C ₁ discharges the electric charge that had been charged up to that point according to the time constant of the resistor R _3, and when the potential between its terminals reaches the threshold level, the resistance of the NOR gate 13-1 will eventually be reached. Since the input terminal connected to R ₂ becomes “1”, the output terminal of the NOR gate 13-1 becomes “0” and the light emitting diode LD is turned off. Then, the capacitor C ₁ starts charging, and then returns to the original state, and the light emitting diode LD is turned on. By repeating such an operation, the light emitting diode is kept in a blinking state.

Next, when the jumper J brings the contacts T ₃ and T ₅ into a short-circuited state, in this case, it is the same as the switching transistor TR holding the conductive state.
A constant current flows through the light emitting diode without interruption, and the lighting state is maintained. The capacitor C ₂ provided in parallel with the power supply terminal of the IC 14 is provided to use the charge charged in the capacitor C ₂ as a power supply for a short time so as not to stop the clock operation even when the dry battery is replaced. .

The projection device of the present invention is configured as described above. For example, when traveling on the road such as a bicycle at night, an engaging surface piece (commercially available under a trademark such as Velcro or Velcro) is attached to the wall surface of the main body. It can be used as a tail light or an alarm light by sticking it to the engaged surface piece that is fixed to the upper garment with a pin or the like, and if you want to know the time, it is formed on the above liquid crystal display element on a suitable wall surface. You can find out by projecting the clock information. Also, when the guide information of the digestive organs is formed on the liquid crystal display element, it is easily attached to the digestive organs placed in a corridor of a hotel, for example, and the word "digestive organ" is usually attached to the wall surface. It can be used as a guide light by projecting it, and can be used as a guide light when a fire occurs.

[Effect of device]

As described above in detail, the projection device of the present invention can be used for various purposes such as time display, guide display, and warning light. Also, since the light emitting diodes are connected in parallel between the power terminals of the IC to form an internal electric circuit, the voltage between the terminals of the light emitting diodes is almost the same even if the power supply voltage is increased due to the nature of the light emitting diodes. , 1.5V to 1.7V, it is possible to avoid application of overvoltage to the IC. Therefore, useless power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing an internal mechanism of a projection apparatus according to the present invention, FIG. 2 is a front view of the projection apparatus according to the present invention, and FIG. 3 is an example of an electronic circuit used in the projection apparatus according to the present invention. It is a block diagram showing. 1 ... Projection device, 2 ... Main body, 3 ... Light transmitting hole, 4 ... Lens, 5 ... Light emitting element, 6 ... Liquid crystal display element, 7 ... Slide switch, 8 ... Substrate, 9a, 9b ...... Time adjuster, 1
0a, 10b …… Batteries, 11a, 11b …… Electrodes, 12 …… Lid, 13-1,
13-2 …… Noah Gate, 14 …… IC.

Claims (1)

[Scope of utility model registration request] 1. A case-shaped main body, a light-transmitting hole is provided in a wall surface of the main body, and a light-emitting diode is arranged in the main body so as to face the light-transmitting hole. A projection apparatus comprising an electric circuit including a structure in which a liquid crystal display element is interposed between light transmitting holes and the light emitting diode is connected between power supply terminals of an IC for driving the liquid crystal display element.