JPH11224529A - Television lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To brighten the circumference of a television, when darkened, by automatic lighting, and prevent a photo allergic person from being attacked with a brain wave abnormality by driving a lighting means for television circumference when both detection outputs of a detecting means for television circumference illuminance and a television operation detecting means are received. SOLUTION: When an illuminance sensor 1 detects a darkness less than a set illuminance, and a television operation sensor 2 detects the ON state of a television, a load 6 such as a stand illuminator arranged near the television or the luminaire of a room in which the television is set is lighted. Thus, since the circumference of the television is brightened to minimize the change of the whole brightness getting into the eyes of the flashing with large contrast, the fear of a photo allergic person being attacked with a brain wave abnormality can be eliminated. Since the load 6 is constituted so as to be automatically extinguished when watching television is stopped to turn off television, this device is extremely convenient.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a television lighting device.

[0002]

2. Description of the Related Art Conventionally, a user starts watching a television while the room is bright, and continues to watch the television in a dark state without turning on the lighting of the room even when it becomes dark in the evening, or turning on the television in a dark room from the beginning. Sometimes you see.

[0003]

However, when the television is viewed in a state where the surroundings are dark, blinking light having a large contrast on the television screen is a great stimulus to the eyes.
It has recently become known that people with photosensitivity cause abnormalities in brain waves. Photosensitivity can occur regardless of age, but parents have to be careful not to watch TV for long periods of time in dark surroundings, especially in families with children.

[0004] It is an object of the present invention to provide a television lighting device which solves the above-mentioned conventional problems.

[0005]

According to a first aspect of the present invention, there is provided a television operating state detecting circuit, comprising: an illuminance detecting means for detecting at least brightness around a television receiver; TV operation detecting means for detecting whether the TV screen is on or not, illuminating means for illuminating at least the periphery of the television receiver, and both detection outputs of the illuminance detecting means and the TV operation detecting means are present. And driving means for driving the lighting means.

According to a second aspect of the present invention, there is provided a television operating state detecting circuit for illuminance detecting means for detecting at least brightness around the television receiver, and for turning on a television screen of the television receiver. TV operation detecting means for detecting whether or not the television receiver is illuminated, illuminating means for illuminating at least the periphery of a television receiver, and the illuminating means when both the illuminance detecting means and the television operation detecting means have a detection output. And a driving unit for gradually turning off the illumination unit when the detection output of the television operation detection unit is lost.

According to a third aspect of the present invention, there is provided a television operating state detecting circuit for turning on an illuminance sensor for detecting brightness around a television receiver and turning on a television screen of the television receiver. A television operation sensor for detecting whether or not there is a connection, a logic element to which both detection outputs of the illuminance sensor and the television operation sensor are inputted, and an input side light emitting element and a power supply line which are driven to be lit by the output of the logic element. And a lighting means connected to the power supply line and illuminating at least the periphery of the television receiver.

According to a fourth aspect of the present invention, there is provided a television operating state detecting circuit for detecting whether an illuminance sensor for detecting brightness around a television receiver and a television screen of the television receiver are turned on. A logic device to which detection outputs of the illuminance sensor and the television motion sensor are input, and an L (or H) level output of the logic device, which is immediately supplied to the logic device. A photocoupler including an input light emitting element driven by the output of the delay means and an output light trigger element connected to a power supply line; and Lighting means connected to a power supply line and illuminating at least the periphery of the television receiver.

[0009]

FIG. 1 is a block diagram showing an embodiment of a television lighting device according to the present invention. In FIG. 1, 1 is an illuminance sensor, 2 is a television operation sensor, 3 is a logic element, 4 is a photocoupler, 5 is a control rectifier, and 6 is a load. The illuminance sensor 1 detects the illuminance around the television receiver (or a room where the television receiver is placed) by using a detection element 1a such as a phototransistor, and adjusts the adjustment resistance 1b.
The output becomes the H level when the illuminance is equal to or less than the variable set value (when dark), and the output becomes the L level when the illuminance exceeds the set illuminance.

The television operation sensor 2 is for detecting that the television is in operation, and has, for example, a parallel resonance circuit composed of a proximity coil L1 and a capacitor C1. Is set equal to the horizontal synchronizing signal frequency in the video output signal. The output of the television operation sensor 2 goes to an H level when it is detected that the television is on and in an operating state, and is at an L level when it is detected that it is off. The logic element 3 is, for example, a NAND gate. When the two inputs are at the H level, the output is at the L level, the transistor Q1 in the next stage is driven to be in the ON state, and the photocoupler 4 is connected to the collector of the transistor Q1. The input side LED (light emitting diode) 4a of the interface composed of the above is turned on, and the output side light trigger element 4b is driven.

The light trigger element 4b on the output side supplies a trigger signal to a control electrode of a control rectifier 5 such as a triac connected to the AC power supply line together with the load 6. The triac 5 is turned on when a trigger signal is supplied to the control electrode, and is used as a current amplifying means. A triac 5 is provided with a load (for example, a stand illuminator disposed near a television receiver or a television receiver). An AC current is supplied to the lighting equipment 6 in the room. (Output side light trigger element 4b of photocoupler 4)
If there is a rating enough to handle a large current, the output side light trigger element 4 can be used without using a control rectifier 5 such as a triac.
b can be connected to an AC power supply line and the lighting device as the load 6 can be directly turned on. )

In this way, when the illuminance sensor 1 detects that the illuminance has become lower than the set illuminance (it has become dark) and the television operation sensor 2 detects the ON state of the television,
The load 6 lights up.

On the other hand, when the television receiver is turned off, NA
The output of the ND gate 3 changes from H level to L level, the transistor Q1 in the next stage is turned off, the input LED 4a of the photocoupler 4 is turned off, and the output light trigger element 4b is turned off. When the light trigger element 4b on the output side is turned off, the triac 5 is also turned off, so that no AC current is supplied to the load 6, and the load 6 is turned off.

When the load 6 is turned on, light from the load 6 also enters the photosensor 1a which is an input of the illuminance sensor 1. Therefore, the built-in amplifier (not shown) of the illuminance sensor 1 provides hysteresis to the illuminance detection level. It is necessary to devise measures such as preventing the influence of the incident light from the load 6 and installing the photosensor 1a in a direction where the light from the load 6 does not directly enter. It is well known.

A power source rectified from an AC power line may be used as a power source for the illuminance sensor 1, the television operation sensor 2, and the logic element 3. In this case, if the housing and the operation unit containing the television lighting device are completely insulated (when there is no fear of electric shock), it can be used by directly rectifying from the AC power supply line.

As described above, when the illuminance sensor 1 detects that the illuminance has become lower than the set illuminance (it has become dark) and the television operation sensor 2 detects the ON state of the television, the load (for example, television reception) Since the stand illuminator and the illuminator in the room where the television receiver is placed near the television receiver are turned on, the surroundings of the television receiver become brighter, and a large contrast blinking can be seen. The change in the overall brightness is small, and there is no risk of causing electroencephalogram abnormalities to a person with photosensitivity. When the user stops watching the television and turns off the television, the load 6 is automatically turned off, which is convenient.

[0017]

FIG. 2 is a block diagram showing another embodiment of the television lighting apparatus according to the present invention. The configuration of FIG. 2 is substantially the same as the configuration of FIG. 1 except that resistors R1 and R2 and a capacitor C1 are provided between the NAND gate 3 and the transistor Q1.
And a time constant circuit 7 including a diode D1.

When the output of the NAND gate 3 shown in FIG. 3A becomes L level, the diode D1 of the time constant circuit 7 conducts to charge the capacitor C1 and at the same time the base voltage of the transistor Q1 (FIG. 3B). ) Quickly goes low, driving transistor Q1 to the on state. When the transistor Q1 is turned on, a current (FIG. 3 (C)) flows through the input side LED 4a of the photocoupler 4 to turn on, and the current is supplied to the load 6 based on the above-described operation, and the load 6 turns on.

When the output of the NAND gate 3 changes from the L level to the H level, the diode D1 of the time constant circuit 7 becomes nonconductive, and the charge of the capacitor C1 is reduced by the resistance R.
1 and a capacitor C1 to discharge in accordance with a time constant (C1 · R1), and as shown in FIG. 3B, acts as delay means for gradually increasing the base voltage of the transistor Q1 from L level to H level. The base of the transistor Q1 is L
As the level gradually rises from the H level to the H level, the current flowing through the input side LED 4a of the photocoupler 4 becomes larger as shown in FIG.
As shown in (C), since the light emission intensity of the LED 4a gradually decreases and finally turns off as shown in (C), the amount of AC current flowing to the load 6 gradually decreases by controlling the triac 5 accordingly. Finally, the current stops flowing. Therefore, the load 6 gradually becomes darker from the lighting state, and finally turns off.

As described above, in the configuration of FIG. 2, the illuminance sensor 1 has become lower than the set illuminance (it has become dark).
When the television operation sensor 2 detects that the television is in the ON state, the load 6 is immediately turned on, so that the surroundings of the television receiver become brighter. In this case, the sensitivity becomes smaller, so that a person with photosensitivity does not have a possibility of causing an electroencephalogram abnormality. Also,
When the user stops watching the television and turns off the television, the load 6 is also automatically darkened and finally turned off, which is safe and convenient at bedtime.

In the configuration of FIG. 2, the diode D1 and the resistor R2 of the time constant circuit may be omitted. In this case, even when the output of the NAND gate 3 changes from the H level to the L level, the time constant (C1 · R1) works. As a result, the load 6 gradually becomes brighter even when the load 6 is turned on. The lighting is controlled as follows.

Further, in the configuration of FIG. 2, a timer (not shown) is connected in place of the time constant
When the output of the D gate 3 goes to L level, the base of the transistor Q1 goes to L level immediately. When the output of the NAND gate 3 changes from L level to H level, the timer time (for example, several seconds) from the time of the change. After the lapse of time, the base of transistor Q1 may be driven to change from L level to H level.

FIG. 4 is a circuit diagram showing a specific configuration example of the television operation sensor used in FIGS.
In FIG. 4, Q2 is an npn-type switching transistor, Q3 is a pnp-type switching transistor, S1 is a proximity sensor composed of a parallel resonance circuit composed of a proximity coil L1 and a capacitor C2, R3 is a resistor, C3 is a capacitor, + Vcc is a power supply, OUT is an output terminal. The resonance frequency f1 of the proximity sensor S1 is, for example, the frequency 15.75 of the horizontal synchronization signal in the video output signal of the NTSC television.
It is set equal to kHz.

The television operation sensor having the above-mentioned configuration is
When the television is turned on and the television screen is displayed near the TSC television (for example, above the television receiver), the proximity sensor S1 detects the horizontal synchronization in the video output signal leaked from the video output circuit. Signal (frequency 15.75
kHz), and turns on the switching transistor Q2. When the switching transistor Q2 is turned on, the switching transistor Q3 is also turned on, and an "H" level detection output signal is generated from the output terminal OUT.

As described above, the television operation sensor is a system in which the leakage synchronization signal is picked up by the proximity coil. However, regardless of the difference in the television system, in order to clearly detect and prevent malfunction, the resonance of the proximity coil and the capacitor is used. Synchronous signals of various TV systems are detected. The switching element is shunted and turned off at a frequency other than the resonance frequency of the proximity sensor, and does not require power for detection. When the television is turned on and the synchronization signal is detected, the detection output becomes H, so that it is possible to detect whether the television is operating or inactive.

[0026]

According to the present invention, when the television is turned on at least when the periphery of the television is dark, or when the periphery of the television becomes dark while watching the television, the load is automatically increased (for example, the television receiver). Lights and lighting fixtures in the room where the TV set is placed near the TV set), so the surroundings of the TV set become brighter, causing electroencephalogram abnormalities in people with photosensitivity. There is no fear.
Further, when the user stops watching the television and turns off the television, the load is automatically turned off, which is safe and convenient at bedtime.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of a television lighting device according to the present invention.

FIG. 2 is a configuration diagram showing another embodiment of the television lighting device according to the present invention.

3A and 3B are signal waveform diagrams of respective parts in the configuration diagram of FIG. 2, wherein FIG. 3A shows an output waveform of a logic element, FIG. 3B shows a transistor base voltage waveform, and FIG. 3C shows an input-side LED current waveform of a photocoupler. It is.

FIG. 4 is a circuit diagram showing a specific configuration example of a television operation sensor used in FIGS. 1 and 2;

[Explanation of symbols]

 Reference Signs List 1 illuminance sensor 2 television operation sensor 3 logic element 4 photocoupler 5 control rectifier 6 load 7 time constant circuit

Claims (4)

[Claims] 1. An illuminance detector for detecting at least brightness around a television receiver, a television operation detector for detecting whether a television screen of the television receiver is on, and at least a periphery of the television receiver. A television lighting device comprising: lighting means for illuminating a light source; and driving means for driving the lighting means to light when both of the detection outputs of the illuminance detection means and the television operation detection means are present. 2. Illumination detecting means for detecting at least brightness around the television receiver, television operation detecting means for detecting whether or not a television screen of the television receiver is turned on, and at least the periphery of the television receiver. Lighting means for illuminating the light source, and driving the lighting means when there are both detection outputs of the illuminance detection means and the television operation detection means, and when the detection output of the television operation detection means disappears, A television lighting device, comprising: driving means for gradually turning off the lighting means. 3. An illuminance sensor for detecting the brightness around the television receiver, a television operation sensor for detecting whether or not a television screen of the television receiver is on, and an illuminance sensor and a television operation sensor. A logic element to which both detection outputs are input, a photocoupler including an output light trigger element connected to an input light emitting element and a power supply line driven to be lit by the output of the logic element, and connected to the power supply line; A television illuminating device comprising at least illumination means for illuminating the periphery of the television receiver. 4. An illuminance sensor for detecting the brightness around the television receiver, a television operation sensor for detecting whether or not a television screen of the television receiver is on, and an illumination sensor for the illuminance sensor and the television operation sensor. A logic element to which both detection outputs are input, delay means for immediately supplying an L (or H) level output of the logic element, and delaying and supplying an H (or L) level output of the logic element;
A photocoupler including an input side light emitting element driven by an output of the delay unit and an output side light trigger element connected to a power supply line; and an illuminating unit connected to the power supply line and illuminating at least a periphery of the television receiver. A television lighting device comprising: