KR20100043418A - Brightness control apparatus of television having luminary and method thereof - Google Patents

Brightness control apparatus of television having luminary and method thereof Download PDF

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Publication number
KR20100043418A
KR20100043418A KR1020080102447A KR20080102447A KR20100043418A KR 20100043418 A KR20100043418 A KR 20100043418A KR 1020080102447 A KR1020080102447 A KR 1020080102447A KR 20080102447 A KR20080102447 A KR 20080102447A KR 20100043418 A KR20100043418 A KR 20100043418A
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KR
South Korea
Prior art keywords
brightness
screen brightness
screen
television
light emitting
Prior art date
Application number
KR1020080102447A
Other languages
Korean (ko)
Inventor
전영규
Original Assignee
주식회사 대우일렉트로닉스
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 대우일렉트로닉스 filed Critical 주식회사 대우일렉트로닉스
Priority to KR1020080102447A priority Critical patent/KR20100043418A/en
Publication of KR20100043418A publication Critical patent/KR20100043418A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • F21V23/0464—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H04N5/58—Control of contrast or brightness in dependence upon ambient light

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Television Receiver Circuits (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE: An apparatus for controlling brightness of a television with a light emitting unit and an adjusting method thereof are provided to maintain ambient light of the television to the fixed brightness when intensity of illumination of a screen is changed. CONSTITUTION: An illumination sensor(105) detects ambient light of a television. A light emitting unit(130) emits light. A luminance sensing unit(120) detects screen brightness of an image. When a value of the ambient light of the television which is detected by the illumination sensor, is lower than a fixed value, a control unit(140) controls intensity of illumination of the luminance sensing unit according to screen brightness of the detected images.

Description

Brightness control apparatus of television which has light emitting part, and its control method {BRIGHTNESS CONTROL APPARATUS OF TELEVISION HAVING LUMINARY AND METHOD THEREOF}

The present invention relates to a brightness adjusting apparatus for a television having a light emitting unit and a control method thereof, and more particularly, when the channel is changed or when viewing a program, the illuminance of the screen output through the display unit is sharp compared to that of the space in which the television is installed. The present invention relates to a brightness control apparatus for a television and a method of adjusting the brightness of the television when the difference is achieved.

A television typically receives a broadcast signal transmitted from a broadcasting station, outputs a video signal through a screen, and outputs an audio signal through a speaker. As an analog broadcast is recently converted into digital broadcast, digital television takes up most of the time. As digital television is becoming more popular due to the transition to digital broadcasting, viewers are able to select channels while receiving dozens and hundreds of broadcasts through terrestrial, satellite, cable and IP (Internet) broadcasting.

As the number of channels increases, a recently provided television detects a synchronization signal of a received composite video signal and automatically searches for available channel information to form a channel map. According to the stored order at the time of key input, the channel without the broadcast signal is not displayed, and only the broadcast channel stored in the channel memory is displayed on the display unit. The television is provided with various colors, illuminance, brightness, contrast, etc. according to the user's manipulation of the screen provided on the display unit.

On the other hand, viewers who watch television often watch with dark illumination of the space where the television is installed so that they can see the screen of the television better.

The conventional television as described above has a problem in that a glare phenomenon occurs when the screen is changed through a channel change or the illuminance of the screen is suddenly changed in a dark environment.

SUMMARY OF THE INVENTION The present invention has been made to improve the above-mentioned conventional problems. When the channel is changed or when the illuminance of the screen output through the display unit is suddenly changed from a dark background to a bright background while watching a program, the peripheral illumination of the television is changed. It is an object of the present invention to provide a brightness control device and a control method of the television for maintaining a constant brightness.

Brightness adjusting device of a television having a light emitting unit according to an aspect of the present invention includes an illumination sensor for detecting the ambient brightness of the television; Light emitting unit for emitting light; A luminance sensor for detecting screen brightness of an image; And a controller configured to control the illuminance of the light emitting unit according to the screen brightness of the image detected by the luminance sensor if the ambient brightness of the television detected by the illuminance sensor is less than or equal to a predetermined value.

The light emitting unit may include a plurality of LEDs (LEDs) provided at a predetermined interval on the outer frame; And an LED driver for controlling a driving current applied to the LED so that the illumination of the LED is controlled.

The apparatus may further include an illuminance setting unit configured to set a screen brightness reference value so that the light emitting unit is turned on according to the screen brightness of the image.

The controller may compare the screen brightness value of the image provided to the display unit with the screen brightness reference value to turn off the light emitting unit if the screen brightness of the image is greater than or equal to the screen brightness reference value, and the screen brightness of the image may be set to the screen brightness. If it is less than the reference value, the light emitting unit is turned on.

The controller may control the illuminance of the light emitting unit according to the brightness of the video screen so that the peripheral brightness of the television becomes the screen brightness reference value when the video screen brightness is less than the screen brightness reference value.

According to another aspect of the present invention, a method of adjusting a brightness of a television having a light emitting unit includes: detecting ambient brightness of the television; Detecting screen brightness of an image; And controlling the illuminance of the light emitter according to the screen brightness of the image sensed by the luminance sensor if the ambient brightness of the television is less than or equal to a predetermined value.

The method may further include an illuminance setting step of setting a screen brightness reference value so that the light emitter is turned on according to the screen brightness of the image provided to the display unit.

Further, when the screen brightness reference value is set in the illuminance setting step, the screen brightness of the current image is compared with the screen brightness reference value, and when the screen brightness of the current image is equal to or greater than the screen brightness reference value, the light emitting unit is turned off, and the current image The light emitting unit is turned on when the screen brightness is less than the screen brightness reference value.

The illumination of the light emitting unit may be controlled according to the brightness of the current video screen such that the ambient brightness of the television becomes the screen brightness reference value when the screen brightness of the current video is equal to or less than the screen brightness reference value.

According to the brightness control apparatus of a television having a light emitting unit and a brightness adjustment method of a television having a light emitting unit according to the present invention as described above, the channel is changed in a dark environment or the illuminance of the screen output through the display unit while the program is suddenly changed. When the ambient brightness of the television is maintained at a constant brightness by the light emitting unit, there is an effect that can minimize the glare phenomenon.

Specific embodiments of 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 below 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.

Hereinafter, a brightness adjusting apparatus for a television having a light emitting unit and a brightness adjusting method for a television having a light emitting unit according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a front view showing the appearance of a television having a light emitting unit according to an embodiment of the present invention, Figure 2 is a block diagram showing the configuration of a brightness control apparatus of a television having a light emitting unit according to an embodiment of the present invention.

1 and 2, the television according to the embodiment of the present invention, the brightness control device 100 whose illumination is adjusted so that the ambient brightness of the television is adjusted according to the screen brightness of the image provided through the display unit 103. ). The brightness adjusting device 100 is operated when the ambient brightness of the television detected by the illumination sensor 105 is equal to or less than a predetermined value.

The brightness control apparatus 100 receives a video signal and detects the screen brightness of the video signal output from the video signal processor 110 and the video signal processor 110 that outputs the digital R / G / B video signal in units of frames. The light emitter 130 according to the brightness sensor 120 and the screen brightness detected by the brightness sensor 120, and the screen brightness of the image detected by the brightness sensor 120. Control unit 140 to control the illuminance of the. In addition, the brightness controller 100 further includes a memory unit 150 that stores the screen brightness value detected by the brightness sensor 120.

The brightness sensor 120 detects the screen brightness of the video signal provided to the display 103 through the video signal processor 110 at predetermined time intervals and displays the screen brightness value of the detected video signal in the memory unit 150. Save it. Specifically, the brightness sensor 120 detects the screen brightness of the image signal provided to the display unit 103 in units of frames, and the screen brightness values of the image signals detected in each frame unit are respectively stored in the memory unit 150. Stored.

The light emitting unit 130 includes a plurality of LEDs 131 installed at a predetermined interval on the outer frame 101 and the LEDs 131 so that the illuminance of the LEDs 131 is controlled according to the brightness of the image screen provided to the display unit 103. It includes an LED driver 133 for controlling the driving current applied to.

The controller 140 may display the screen brightness value of the current image frame provided to the current display unit 103 through the luminance detector 120 and the memory unit 150, and then, the next image frame to be provided to the display unit 103. If screen brightness is provided, compare it. When the screen brightness value of the next video frame is different from the screen brightness value of the current video frame by more than a predetermined brightness value, the controller 140 displays the peripheral brightness of the screen of the current video frame. The illumination of the LED 131 is controlled by controlling the LED driver 133 to have a brightness value. Accordingly, the screen brightness provided to the display unit 103 and the ambient brightness of the television are kept similar.

As such, when the ambient brightness of the television is controlled by the light emitter 130 according to the screen brightness of the current image frame provided to the display 103, the display unit 103 is displayed while watching television in a dark state. Even if the provided screen suddenly darkens and brightens, the ambient brightness of the television is constantly controlled, so glare is minimized.

That is, since the LED 131 of the driving unit 103 is emitted by the control unit 140 to be the same as the screen brightness of the current display unit 103, since the periphery of the television maintains a bright state beyond a certain level of illumination, the display unit Even if the brightness of the screen provided to the 103 is suddenly changed, the glare that the viewer feels is minimized.

In addition, when the channel change signal is input through the remote controller (not shown) or the key input unit (not shown), the control unit 140 according to the present exemplary embodiment detects the brightness detection unit 120 at the time when the channel change signal is input. The illuminance of the LED 131 of the light emitter 130 is controlled by using the screen brightness value of one image frame. Accordingly, when the channel of the television is changed in the process of changing the channel of the television, the display unit 103 is blanked and darkened in the channel without the broadcast signal. In case of loss, the ambient brightness of the television remains controlled by the screen brightness of the previous channel, so that the glare is reduced.

Meanwhile, the brightness control apparatus 100 of the television according to the present exemplary embodiment may set the screen brightness reference value so that the LED 131 of the light emitting unit 130 is turned on according to the screen brightness of the image provided to the display unit 103. The illuminance setting unit 160 further includes. When the screen brightness reference value of the display unit 103 is set through the illuminance setting unit 160, the controller 160 compares the set screen brightness reference value with the screen brightness of the current image provided to the display unit 103. If the screen brightness of the current image of 103 is less than the screen brightness reference value, the illumination of the LED 131 is controlled by controlling the LED bulb 133 so that the ambient brightness of the television becomes the screen brightness reference value.

In addition, the controller 160 adjusts the illuminance of the light emitter 130 according to the brightness of the video screen so that the peripheral brightness of the television becomes the screen brightness reference value when the video screen brightness to be provided to the display 103 is less than the screen brightness reference value. Dimming can also be controlled. Accordingly, when the screen brightness of the current image is less than or equal to the screen brightness reference value, the ambient brightness of the television is always kept the same as the screen brightness reference value.

Meanwhile, the controller 160 compares the set screen brightness reference value with the screen brightness of the current image provided to the display 103, and if the current image screen brightness of the display 103 is greater than or equal to the screen brightness reference value, the LED driver 133. ) To turn off the LEDs 131.

Next, a method of adjusting brightness of a television having a light emitting unit according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.

3 is a flowchart illustrating a brightness control method of a television having a light emitting unit according to an exemplary embodiment of the present invention.

1 to 3, the brightness control method of a television having a light emitting unit according to the present embodiment detects illuminance around the television through the illuminance sensor 105 (S10) when the illuminance around the television is below a predetermined illuminance. It is determined whether the screen brightness reference value of the display 103 is set (S11).

First, if the screen brightness reference value is set in step S11, the screen brightness reference value is compared with the screen brightness of the current image provided to the display 103 (S13). When the screen brightness of the current image provided to the display unit 103 is less than the screen brightness reference value (S13), the light emitter 130 is turned on so that the ambient brightness of the television is equal to the screen brightness reference value. According to the brightness of the screen, the illumination of the LED 131 of the light emitting unit 130 is controlled by dimming (S15). That is, when the screen brightness of the current image is less than the screen brightness reference value, the illuminance of the LED 131 is controlled so that the ambient brightness of the television is always maintained at the screen brightness reference value, so that the glare is further reduced and the eye fatigue is also reduced. do.

Meanwhile, when the screen brightness of the current image provided to the display unit 103 is equal to or greater than the screen brightness reference value, the LED 130 is turned off by controlling the light emitter 130.

In addition, if the screen brightness reference value is not set in step S11, screen brightness of an image provided to the display unit 103 is sensed (S20). In the step S20 of detecting the screen brightness of the current image of the display 103, the brightness sensor 120 displays the screen brightness of the image signal provided to the display 103 through the image signal processor 110 for each frame. Detect by unit

After the step S20, according to the screen brightness of the current image provided to the display unit 103, the illumination unit 130 is controlled so that the ambient brightness of the television becomes the screen brightness of the current image to dimm the illuminance of the LED 131. (DIMMING) Control (S21). When the LED 131 of the light emitting unit 130 emits light and the ambient brightness of the television is maintained to be the same as the screen brightness of the current image provided to the display unit 103 (S21), the LED is provided through the current display unit 103. The screen brightness of the current video frame is compared with the screen brightness of the next video frame to be provided to the display 103 (S23). In this case, the screen brightness of the current image frame provided to the display unit 103 may be adjusted so that the controller 140 may compare the screen brightness of the current image frame provided to the display unit 103 with the screen brightness of the next provided image frame. The brightness of the next image frame to be provided through the memory unit 150 and to the display unit 103 is provided through the luminance sensor 120, respectively.

In addition, as a result of comparing the screen brightness of the current video frame with the screen brightness of the next video frame (S23), the screen brightness of the next video frame has a screen brightness darker than a predetermined luminance value compared to the screen brightness of the current video frame. In operation S25, the luminance of the LED 131 is controlled by controlling the light emitter 130 so that the ambient brightness of the television becomes the screen brightness of the current image frame. That is, since the light emitter 130 is controlled to compare the screen brightness of the current video frame with the screen brightness of the next video frame so that the ambient brightness of the television becomes the screen brightness of the brighter video frame, the ambient brightness of the television is constantly maintained. I can keep it.

The brightness control method of the television as described above darkens the periphery of the television at night, while the screen provided through the display unit 103 suddenly darkens and becomes bright when the television is turned around by the light emitter 130. Since the brightness is kept constant, the glare of the viewer is minimized.

In addition, even when the channel of the television is changed through the operation of the remote controller (not shown) or the key input unit (not shown), the display unit 103 is blanked and darkened in a channel without a broadcast signal. When it suddenly brightens while crossing the channel, the peripheral illumination of the television has a constant brightness by the light emitter 130, and this also reduces the glare.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is merely exemplary, and various modifications and equivalent other embodiments of the present invention may be made by those skilled in the art. I understand that it is possible. Therefore, the true technical protection scope of the present invention will be defined by the claims below.

1 is a front view showing the appearance of a television having a light emitting unit according to an embodiment of the present invention.

2 is a block diagram showing the configuration of a brightness control apparatus of a television having a light emitting unit according to an embodiment of the present invention.

3 is a flowchart illustrating a brightness control method of a television having a light emitting unit according to an exemplary embodiment of the present invention.

♠ Code description for the main part of the drawing ♠

100: brightness control device 101: outer frame

103: display unit 110: image signal processing unit

120: luminance detection unit 130: light emitting unit

131: LED 133: LED drive unit

140: control unit 150: memory unit

160: illuminance setting unit

Claims (9)

Ambient light sensor for detecting the ambient brightness of the television; Light emitting unit for emitting light; A luminance sensor for detecting screen brightness of an image; And A controller for controlling the illuminance of the light emitting unit according to the screen brightness of the image sensed by the luminance sensor if the ambient brightness of the television detected by the illuminance sensor is less than or equal to a predetermined value; Brightness control apparatus having a light emitting unit comprising a. The method of claim 1, wherein the light emitting unit LEDs (LEDs) provided in a plurality at predetermined intervals on the outer frame; And An LED driver configured to control a driving current applied to the LED so that the illumination of the LED is controlled; Brightness control apparatus having a light emitting unit comprising a. The method of claim 1, And an illuminance setting unit for setting a screen brightness reference value so that the light emitting unit is turned on according to the screen brightness of the image. The method of claim 1, The controller compares the screen brightness value of the image provided to the display unit with the screen brightness reference value to turn off the light emitting unit when the screen brightness of the image is greater than or equal to the screen brightness reference value, and the screen brightness of the image is less than the screen brightness reference value. A brightness controller of a television having a light emitting unit, wherein the light emitting unit is turned on. The method of claim 1, And the controller controls the illuminance of the light emitting unit according to the brightness of the video screen so that the ambient brightness of the television becomes the screen brightness reference value when the video screen brightness is less than the screen brightness reference value. Detecting ambient brightness of the television; Detecting screen brightness of an image; And Controlling the illuminance of the light emitter according to the screen brightness of the image sensed by the brightness detector when the ambient brightness of the television is less than or equal to a predetermined value; How to adjust the brightness of the television comprising a. The method of claim 6, And an illuminance setting step of setting a screen brightness reference value so that the light emitter is turned on according to the screen brightness of the image provided to the display unit. The method of claim 7, wherein When the screen brightness reference value is set in the illuminance setting step, the screen brightness of the current image is compared with the screen brightness reference value, and when the screen brightness of the current image is greater than or equal to the screen brightness reference value, the light emitting unit is turned off, and the screen of the current image is displayed. And illuminating the light emitting unit when the brightness is less than the screen brightness reference value. The method of claim 7, wherein And if the screen brightness of the current video is equal to or less than the screen brightness reference value, controlling the illuminance of the light emitting unit according to the brightness of the current video screen so that the peripheral brightness of the television becomes the screen brightness reference value.
KR1020080102447A 2008-10-20 2008-10-20 Brightness control apparatus of television having luminary and method thereof KR20100043418A (en)

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KR1020080102447A KR20100043418A (en) 2008-10-20 2008-10-20 Brightness control apparatus of television having luminary and method thereof

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Application Number Priority Date Filing Date Title
KR1020080102447A KR20100043418A (en) 2008-10-20 2008-10-20 Brightness control apparatus of television having luminary and method thereof

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KR20100043418A true KR20100043418A (en) 2010-04-29

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180133307A (en) * 2017-04-19 2018-12-14 선전 구딕스 테크놀로지 컴퍼니, 리미티드 light intensity detection method, device and SMART terminal
US10204593B2 (en) 2015-04-21 2019-02-12 Samsung Electronics Co., Ltd. Display apparatus and method for controlling the same
US11122235B2 (en) 2014-12-30 2021-09-14 Samsung Electronics Co., Ltd. Display device and control method therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11122235B2 (en) 2014-12-30 2021-09-14 Samsung Electronics Co., Ltd. Display device and control method therefor
US10204593B2 (en) 2015-04-21 2019-02-12 Samsung Electronics Co., Ltd. Display apparatus and method for controlling the same
KR20180133307A (en) * 2017-04-19 2018-12-14 선전 구딕스 테크놀로지 컴퍼니, 리미티드 light intensity detection method, device and SMART terminal

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