KR20000009708U - Illumination Control of Car Audio Lighting Lamp - Google Patents

Abstract

The present invention relates to an illumination lamp illumination control device of the car audio, and more specifically, changes in the ambient illumination at day and night when the illumination of the illumination lamp provided to illuminate the surroundings of the LCD indicating the operation state of the car audio. The illumination lamp illumination control device of the car audio to be variable in response to the.

To this end, the present invention applies a plurality of mutually connected lighting lamps arranged to illuminate the surroundings of an LCD displaying information such as an operation state of a car audio, and applies a driving power source having a different voltage level to the lighting lamp each day and night. A car audio switch for applying the charging power of the battery to the regulator when the vehicle is turned on by interlocking with a regulator, a battery, and a ignition key of the vehicle, and the car audio switch is turned on from the battery as the car audio switch is turned on. When the furnace charging voltage is applied, it characterized in that it comprises an illuminance control unit for controlling the illumination level of the illumination lamp by controlling the drive power level supplied from the regulator to the respective illumination lamps.

Description

Illumination control device of car audio lighting lamp

The present invention relates to an illumination lamp illumination control device of a car audio, and more particularly, changes in ambient illumination at day and night when the illumination of an illumination lamp provided to illuminate the surroundings of an LCD indicating the operating state of the car audio. The illumination lamp illumination control device of the car audio to be variable in response to the.

In general, the car audio system is an audio system attached to the car to enable listening to high-quality music in the car in accordance with the demands of modern people whose automobile life is generalized. A radio tuner, a cassette deck, etc. are provided, and as an optional compact disc player, etc. Equipped with a so that you can listen to a variety of music while driving.

On the other hand, the dash panel located in front of the driver has an operation state of the car audio, that is, a play state and a song when listening to music through a tuned radio channel and a cassette tape or a compact disc when listening to a radio station. A display unit for displaying numbers and the like is provided. The display unit of the car audio system is generally implemented as an LCD (LCD), and is provided with an illumination lamp that illuminates the periphery of the LCD screen to more accurately identify the information displayed on the LCD.

Figure 1 is a circuit diagram showing the configuration of such a conventional car lamp lighting lamp drive. As shown in FIG. 1, a conventional car audio lighting lamp driving device receives driving power from a battery (not shown) when a ignition key of a car is turned on, and drives driving power to a plurality of lighting lamps L1 to LN provided. It consists of a regulator (10) for applying. At this time, the regulator 10 converts the charging power supplied from the battery, for example, 12V battery power into a constant voltage power supply of a predetermined size required to drive the lamp, for example, to a voltage of 5V, and applies it to the respective lighting lamps L1 to LN. The regulator 10 maintains a voltage between the power output terminal OUT and the ground terminal GND at 5V (or 8V) according to a preset rating to output power to the lamp driving power. do.

However, since the lighting lamps driven by the conventional car audio lighting lamp driving apparatus are always driven at the same illuminance, it is relatively difficult to identify the car audio information displayed on the LCD due to the bright surroundings during the day. In the case of the night, the ambient light is low and the external illumination is low, so it is easy to identify the display information of the LCD with relatively low light compared to the daytime, which wastes unnecessary power and is relatively brighter than the daytime. Because of this, there was a drawback to the driver's driving.

Therefore, the present invention has been devised to solve the above-mentioned problems, and its purpose is to slightly increase the illuminance of the lighting lamp illuminating the LCD of the car audio in the daytime, and relatively slightly lower than the daytime in the nighttime. It is intended to provide an illumination control device of a car audio lighting lamp that enables the driver to easily identify the information displayed on the car audio LCD in both day and night cases without feeling eye fatigue.

1 is a circuit diagram showing the configuration of a conventional car audio lighting lamp driving apparatus.

2 is a circuit diagram showing the configuration of the car audio lighting lamp illumination control device according to the present invention.

Explanation of symbols on the main parts of the drawings

10, 20 ... regulator 30 ... battery

40 ... car audio switch 50 ... illumination control unit

L1 to LN ... light lamps D1, D2, D3 ... diodes

TR1 ... first transistor TR2 ... second transistor

In order to achieve the above object, the audio control device of the LCD of the car audio according to the present invention is a plurality of lighting lamps connected in parallel and interconnected to illuminate the periphery of the LCD for displaying information such as the operation state of the car audio, A regulator for applying a driving power having a different voltage level during the day and at night, and a car audio switch for applying the charging power of the battery to the regulator when the vehicle is turned on by being driven in conjunction with a battery and a ignition key of a vehicle And an illuminance controller configured to variably adjust illuminance of an illumination lamp by controlling a driving power level supplied from the regulator to the respective illumination lamps when a charging voltage is applied from a battery to the regulator as the car audio switch is turned on. Characterized in that made.

In addition, in the car audio lighting lamp illumination control device according to the present invention, the illumination control unit is connected to the third diode connected to the ground terminal of the regulator, the collector terminal is connected to the anode side of the third diode and the resistor (R1) A first transistor having a base end connected to the cathode side of the second diode that prevents reverse current between the regulator and the battery through R2, and an emitter end connected between the resistors R1 and R2. The base stage may include a second transistor driven by receiving a headlamp driving signal through the resistors R4 and R5.

Hereinafter, with reference to the accompanying drawings, the configuration and operation effects of the LCD roughness control device of the car audio according to a preferred embodiment of the present invention will be described.

2 is a circuit diagram showing the configuration of the illumination control device of the car audio lighting lamp according to the present invention. As shown in Figure 2, the illumination control device of the car audio lighting lamp according to the present invention is a plurality of lighting lamps L1 ~ LN connected in parallel to each other provided to illuminate the periphery of the LCD for displaying information such as the operation state of the car audio ), The regulator 20 to apply different levels of driving power to the lighting lamps L1 to LN during the day and at night, the battery 30 charged with the battery power, and the ignition key and the driving key of the vehicle. When the vehicle is turned on (turned on), the car audio switch 40 applying the charging power of the battery 30 to the regulator 20 and the battery 30 as the car audio switch 40 is turned on. When a charging voltage is applied from the regulator 20 to the regulator 20, the illumination intensity of the illumination lamps L1 to LN is variably controlled by controlling the magnitude of the driving power supplied from the regulator 20 to the respective illumination lamps L1 to LN. Illumination control unit (50) It accomplished by having.

In the above-described configuration, the regulator 20 receives the battery power output from the battery 30 through the power input terminal IN and according to the magnitude of the voltage signal applied to the ground terminal GND, the power output terminal ( By controlling the level of the voltage signal output to OUT), the voltage between the ground terminal GND and the power output terminal OUT is kept constant.

In addition, the illuminance control unit 50 includes a third diode D3 connected to the ground terminal GND of the regulator 20, and a collector end connected to an anode side of the third diode D3, and a resistor R1. The first transistor TR1 and the emitter stage whose base ends are connected to the cathode side of the second diode D2 which prevents reverse current between the regulator 20 and the battery 30 through R2). The second terminal TR2 is connected to the middle of the resistors R1 and R2, and the base terminal includes a second transistor TR2 driven by receiving a headlamp driving signal through the resistors R4 and R5. In this case, the first transistor TR1 is an NPN transistor, and the second transistor TR2 is a PNP transistor.

The headlight driving signal applied as the base driving signal of the second transistor TR2 is configured to turn on the headlight switch (not shown) when the driver determines that illumination is required in front of the vehicle, such as at night. As the driving signal, the high level signal is applied when the headlight switch is turned on and the headlight is turned on, and the low level signal is applied when the headlight switch is turned off and the headlight is turned off.

Hereinafter, the configuration and operation of the illumination lamp illumination control device of the car audio according to a preferred embodiment of the present invention will be described in detail.

First, when the exterior light of the vehicle is bright as in the daytime, the driver does not turn on the headlight of the vehicle, so the headlight driving signal applied as the base driving signal to the base terminal of the second transistor TR2 becomes a low level signal. Thus, the second transistor TR2 is turned on.

On the other hand, when the driver turns on the ignition key to drive the vehicle, the car audio switch 40 is turned on and the charging power from the battery 30 is applied to the regulator 20 through the second diode D2. In this case, since the first transistor TR1 is turned on because the second transistor TR2 is turned on, a low level signal is applied to the base terminal, thereby being turned off.

Therefore, since the first transistor TR1 is turned off to the ground terminal GND of the regulator 20, 0.7V is applied to the voltage signal of the third diode D3, for example, 0.7V diode. In this case, when the voltage difference between the ground terminal GND and the power output terminal OUT is set to 5 V as an example, the regulator 20 adjusts the battery power to output a voltage of 5.7 V to the output terminal OUT. Done. Accordingly, since the plurality of lighting lamps L1 to LN that are turned on by receiving the driving voltage from the regulator 20 are driven with a relatively high voltage when compared to the night, the illumination of the lamp can be increased.

On the other hand, when the vehicle is dark, such as at sunset, at night, or in rainy weather, it is difficult to identify the vehicle ahead. Therefore, the driver turns on the headlights to drive the vehicle. It is applied as a base drive signal. Accordingly, the second transistor TR2 is turned off as the high level driving signal is applied to the base terminal.

Since the charging voltage supplied from the battery 30 is applied to the base terminal of the first transistor TR2 while the car audio switch 40 is turned on, it is turned on. As a ground voltage is applied to the ground terminal GND of the regulator 20, a voltage of 5 V, which is a voltage lower than the daytime, is applied to the power output terminal OUT of the regulator 20.

Therefore, since the lighting lamps L1 to LN are turned on by applying a voltage of 5V, the lighting lamps L1 to LN are lit with relatively low illumination compared to the daytime to illuminate the LCD screen of the car audio.

The illuminance control device of the car audio lighting lamp according to the present invention is not limited to the above-described embodiment, and may be variously modified within the range allowed by the technical idea of the present invention.

As described above, the illumination control device of the car audio lighting lamp according to the present invention is the power applied to the illumination lamp from the regulator according to whether the headlight driving the illumination of the illumination lamp for illuminating the LCD screen indicating the operation state of the car audio Control the illumination of the lighting lamp differently.

Therefore, the illumination control device of the car audio lighting lamp according to the present invention controls the illuminance of the car audio lighting lamp differently during the day and night, thereby easily identifying the information on the LCD screen regardless of the ambient illumination in the daytime. In the case of night, such as driving the light lamp with a relatively low illumination compared to the day can reduce the driver's eyes fatigue can be obtained so as not to interfere with the driver's driving.

Claims (2)

A plurality of mutually connected lighting lamps arranged to illuminate the periphery of the LCD, which displays information on the operation status of the car audio, A regulator for applying driving power having a different voltage level to the illumination lamp each day and night; With battery, A car audio switch operable to apply the charging power of the battery to the regulator when the vehicle is turned on; When the car audio switch is turned on, when the charging voltage is applied from the battery to the regulator is provided with an illuminance control unit for controlling the illumination level of the illumination lamp by controlling the drive power level supplied from the regulator to the respective illumination lamps Car audio lighting lamp dimming device. According to claim 1, wherein the roughness control unit A third diode connected to the ground terminal of the regulator; A first transistor having a collector terminal connected to an anode side of the third diode and a base terminal connected to a cathode side of a second diode that prevents reverse current between the regulator and the battery through resistors R1 and R2. Wow, Car emitter is characterized in that the emitter stage is connected to the middle of the resistor (R1) (R2) and the base stage is provided with a second transistor driven by receiving the headlight driving signal through the resistor (R4) (R5) Lamp dimming device.