KR20100001322A - Method for controlling display apparatus of television - Google Patents

Abstract

The present invention relates to a method of controlling a display device of a television, comprising the steps of: measuring an illuminance value of a surrounding of a television; Comparing the measured illuminance value with a set control table; And controlling the brightness of the LED according to the comparison result.

Unlike the conventional invention, the present invention can prevent unnecessary power consumption by measuring the ambient illumination in a display device of a television such as an LCD and outputting the LED displaying the state of the television according to the brightness of the ambient light with an appropriate brightness. In addition, the user may not be disturbed by viewing the screen due to the brightness of the LED.

Description

Display method control method of television {METHOD FOR CONTROLLING DISPLAY APPARATUS OF TELEVISION}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting diode (LED) as a display device for displaying an operation state of a television. More particularly, the present invention relates to a state of a television according to an illuminance after sensing an ambient illuminance using an illuminance detector. The present invention relates to a method of controlling a display device of a television in consideration of ambient illumination so that a user can watch a television without being disturbed by LED lighting by adjusting a brightness of a display LED.

As electronic and communication technologies are developed, most electronic and communication devices are becoming smaller and lighter. Also, with the advent of the multimedia era, information that can be visually confirmed, such as video and video, has been spotlighted, rather than simple information such as voice and text. Therefore, most of the recently released electronic and communication devices are equipped with a display device that can check information visually. Recently used display devices include a cathode ray tube (CRT), a memory display device, a liquid crystal display (LCD), an electroluminescence (EL), an LED, an electrochromic display (ECD), and the like.

In addition, LEDs are used as a device for displaying a state such as on / off of a television in a television.

From monochromatic textual displays to sophisticated motion video displays, technology is changing rapidly. The display used here requires sophisticated LED drivers that can provide varying brightness levels.

Analog brightness control and PWM (Pulse Width Modulation) illumination control can be used to adjust the brightness of the LED.

LED brightness using analog illumination control is controlled by varying the LED current. For example, if the LED is at full brightness with 20 mA forward current, then 25% brightness is achieved by driving the LED with 5 mA forward current.

In PWM dimming control, the change in LED brightness is achieved by adjusting the overall time the forward current flows. That is, the LED quickly changes "on" and "off". When this switching frequency is above 100 Hz, human vision does not detect that the LED is "on" and "off". The 25% brightness level is achieved by turning on the LED at full current for 25% of the time.

The foregoing has been described for the purpose of understanding the background of the invention, and does not imply prior art that is well known in the art.

Conventional LEDs for displaying the state of the television is fixed to a constant brightness, there is a problem that the user does not adjust the brightness of the LED to the desired brightness, even if the user feels the brightness of the LED is bright or dark while watching the television. Therefore, there is a need for improvement.

The present invention was created to improve the above problems, by using the ambient light sensor to detect the ambient light and adjust the brightness of the LED according to the illumination so that the user can watch TV without being disturbed by the LED light The purpose is.

In addition, an object of the present invention is to prevent unnecessary power consumption caused by keeping the brightness of the LED constant regardless of ambient illumination.

According to an aspect of the present invention, there is provided a method of controlling a display device of a television, the method comprising: measuring an illuminance value around a television installed; Comparing the measured illuminance value with a set control table; And controlling the brightness of the LED according to the comparison result.

In the control table set in the present invention, when the measured illuminance value is 10000Lux or more, the brightness of the LED is 1.3 times to 1.35 times the standard LED brightness, and when the measured illuminance value is 400Lux or more and less than 10000Lux, the brightness of the LED is 0.98 times the standard LED brightness. 1.02 times, when the measured illuminance value is more than 4Lux and less than 400Lux, the brightness of the LED is 0.65 to 0.7 times the standard LED brightness, and when the measured illuminance value is less than 4Lux, the brightness of the LED is 0.3 to 0.35 times the standard LED brightness. It is done.

In the present invention, controlling the brightness of the LED is characterized in that the step of adjusting the amount of LED current.

In the present invention, controlling the brightness of the LED is characterized in that the step of adjusting the on / off time of the LED.

In the present invention, the LED is characterized in that the LED indicating a state such as on / off of the television.

As described above, the display device control method of the television according to the present invention, unlike the conventional invention, the brightness of the LED is automatically adjusted according to the ambient illumination. Therefore, the user may not be disturbed by the LED brightness while watching television, and it is possible to prevent unnecessary power consumption caused by keeping the brightness of the LED constant regardless of ambient illumination.

Hereinafter, an embodiment of a method of controlling a display device of a television according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, the definitions of these terms should be made based on the contents throughout the specification.

1 is a block diagram schematically illustrating a system to which a method for controlling a display device of a television according to an embodiment of the present invention is applied.

As shown in FIG. 1, the system consists of an illuminance sensor 10, an LED controller 20, a memory 30, and an LED 40.

In order to implement the present invention, the illuminance sensing unit 10 measures the intensity of light, that is, illuminance of the outside of the television, and transmits the measured intensity to the LED controller 20.

The LED controller 20 periodically controls the illuminance sensor 10 to measure the ambient illuminance and receives the illuminance value from the illuminance sensor 10, and then compares the illuminance measured with the control table stored in the memory 30. The LED 40 is controlled to output the LED brightness corresponding to the value.

The memory 30 stores a control table corresponding to the LED brightness to be controlled according to the external illuminance, and stores an LED driving program for driving the LED to emit light and various data therefor. Here, the control table will be described in detail with reference to FIG. 3 in a later process.

2 is a flowchart illustrating a method of controlling a display device of a television in consideration of peripheral illumination according to an exemplary embodiment of the present invention.

As described above, the illuminance sensing unit 10 measures the illuminance around the television under the control of the LED control unit 20 (S201).

The LED controller 20 compares the measured illuminance value with the control table stored in the memory 30 (S202), and controls the LED 40 to output an LED brightness corresponding to the measured illuminance value according to the comparison result ( S203).

Here, analog illumination control and PWM illumination control can be used as a method of controlling the LED brightness. In the case of analog illumination control, the brightness of the LED can be controlled by adjusting the amount of LED current. In the case of PWM illumination control, the brightness of the LED can be controlled by controlling the on / off time of the LED.

3 is a diagram illustrating a control table according to an embodiment of the present invention.

The LED controller 20 controls the LED 40 so that the brightness of the LED is 1.3 times to 1.35 times the standard LED brightness when the measured illuminance value is 10000Lux or more. That is, when the illuminance value is more than 10000Lux, the LED control unit 20 determines that the surrounding environment is a very bright daytime environment and prevents the LED lighting from being seen due to the bright surrounding environment.

Similarly, the LED control unit 20 controls the LED 40 so that the brightness of the LED is 0.98 times to 1.02 times the standard LED brightness when the measured illuminance value is 400Lux or more and less than 10000Lux. As shown in the figure based on the illuminance at this time. When the illuminance value is more than 400Lux and less than 10000Lux, the LED controller 20 determines that the surrounding environment is a slightly bright daytime environment and controls the standard LED brightness level.

3, the LED control unit 20, when the measured illuminance value is more than 4Lux and less than 400Lux, the brightness of the LED is 0.65 times to 0.7 times the standard LED brightness, the measured illuminance value is less than 4Lux The brightness of the LED controls LED 40 to be 0.3 to 0.35 times the standard LED brightness. Each judges that the surroundings are slightly dark at night and very dark at night.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and those skilled in the art to which the art belongs can make various modifications and other equivalent embodiments therefrom. Will understand. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a block diagram schematically illustrating a system to which a method for controlling a display device of a television according to an embodiment of the present invention is applied.

2 is a flowchart illustrating a method of controlling a display device of a television in consideration of peripheral illumination according to an exemplary embodiment of the present invention.

3 is a diagram illustrating a control table according to an embodiment of the present invention.

-Explanation of symbols for the main parts of the drawings-

10: illuminance detection unit 20: LED control unit

30: memory 40: LED

Claims (5)

Measuring an illuminance value of the surroundings of the television; Comparing the measured illuminance value with a set control table; And Controlling the brightness of the LED according to the comparison result. The method of claim 1, wherein the set control table is When measured illuminance value is more than 10000Lux, the brightness of LED is 1.3 times 1.35 times of standard LED brightness, When measured illuminance value is more than 400Lux and less than 10000Lux, the brightness of LED is 0.98 times to 1.02 times of standard LED brightness, If the measured illuminance value is more than 4Lux and less than 400Lux, the brightness of the LED is 0.65 to 0.7 times the standard LED brightness. If the measured illuminance value is less than 4 Lux, the brightness of the LED is 0.3 to 0.35 times the standard LED brightness, characterized in that the display device control method of a television. The method of claim 1, wherein controlling the brightness of the LED And controlling the amount of LED current. The method of claim 1, wherein controlling the brightness of the LED And controlling the on / off time of the LED. The method of claim 1, wherein the LED A display device control method for a television, comprising: an LED indicating a state such as on / off of the television.

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