KR20110049338A - Video display device and method of controlling video and audio using photosenso - Google Patents

Abstract

PURPOSE: A video display device and a method of controlling video and audio using a photo-sensor are provided to actively be adapted to a TV external environment. CONSTITUTION: An image display device senses the luminance of an external light source through an optical sensor(S101), and detects a video and audio adjustment value corresponding to a presently-detected luminance from a lookup table(S102). The image display device compensates the external input video and audio signals(S103), and the image display apparatus outputs the compensated video and audio signals adoptive to the luminance of the external light source(S104).

Description

Video display device and method of controlling video and audio using photosenso

The present invention relates to a video and audio adjustment method using an image display device and an optical sensor, and more particularly, to an image display device using an optical sensor to provide an optimal image and audio according to external brightness.

In general, in the video display, the optimum image quality according to various programs has different emotions depending on the content and theme of the contents. Therefore, the viewer sets the viewing environment according to the content and the theme. Watch the program.

The viewing environment includes video setting values such as contrast, brightness, color density, and line drawing, and audio setting values such as volume, treble, bass, and stereo sound. Use the shortcut button to set.

That is, the user displays a menu screen for setting the image quality in order to set the image quality, and sets image setting values such as contrast, brightness, color intensity and sharpness on the displayed menu screen, and also sets the sound quality in order to set the sound quality. It is necessary to display a menu screen for setting and to set voice setting values such as volume, high pitch, low pitch and stereo sound on the displayed menu screen, respectively.

Therefore, there is an inconvenience that the user must set the viewing environment individually.

An object of the present invention is to provide a video display device that senses an external environment change and corrects an image and a sound using a predetermined adjustment value corresponding to a change detection value.

Technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

In order to achieve the above object, an image display apparatus for adjusting an image and a voice using an optical sensor of the present invention includes: an optical sensor for sensing an external light amount; A memory for storing an image adjustment value and an audio adjustment value according to the external light amount as a look-up table; A controller for detecting a stored image adjustment value and an audio adjustment value corresponding to the sensed external light amount; And an image and audio correction unit configured to correct an input image and an audio signal according to the detected image adjustment value and the audio adjustment value.

The image adjustment value includes a brightness and contrast adjustment value, a color adjustment value, and a color density adjustment value corresponding to the external light amount.

The voice adjustment value adjusts a volume level by changing a dynamic range of an input voice signal in response to the external light amount.

The image and audio correction unit may include: an RGB demux for converting an input image signal into R, G, and B signals; brightness, contrast, color, and color saturation of the R, G, and B signals; An LHS converter for detecting the; And a processor configured to apply and correct brightness and contrast adjustment values, color adjustment values, and color depth adjustment values input from the controller to brightness and contrast, color, and color saturation of the input image. processor).

The processor for correcting the brightness and contrast of the input image

, <hef(a)는 명암 조정 값, b(x,y)는 밝기 조정 값>

, <hef (a) is the contrast adjustment value, b (x, y) is the brightness adjustment value>

식을 이용한다.

Use an equation.

When the external light amount is greater than the reference value, the brightness adjustment value b (x, y)> 0, the contrast adjustment value Luminance (x, y) * hef (a)> 0, and the external light amount is less than the reference value The brightness adjustment value b (x, y) <0, and the brightness adjustment value Luminance (x, y) * hef (a) <0.

The processing unit for correcting the color (Hue) of the input image

,<d(x,y)는 색상 조정 값> 을 이용한다.

, <d (x, y) is the color adjustment value>.

The color adjustment value may be corrected to a color opposite to a specific color of an external light source.

A processing unit for correcting the color saturation (Saturation) of the input image

,<c(x,y)는 색농도 조정값> 식을 이용한다.

, <c (x, y) is the color density adjustment value>.

When the external light amount is larger than the reference value, the color density adjustment value c (x, y)> 0, and when the external light amount is smaller than the reference value, the color density adjustment value c (x, y) <0. It is done.

The video and audio correction unit,

,<hef(e)는 음성 조정 값> 식을 이용하여 외부 밝기에 따라 음성 신호를 보정하는 오디오 다이내믹 처리부를 포함한다.

, <hef (e) includes an audio dynamics processor for correcting a voice signal according to external brightness using a voice adjustment value> equation.

When the external light amount is larger than the reference value, the voice adjustment value Audio (x) * hef (e)> 0, and when the external light amount is lower than the reference value, the voice adjustment value Audio (x) * hef (e) < It is characterized by being 0.

The controller sets an automatic viewing environment mode in which an image and an audio are corrected according to the external light amount.

In addition, the present invention provides a video and audio adjustment method of the image display apparatus using an optical sensor, the method comprising the steps of: sensing the external light amount; Detecting a pre-stored image adjustment value and an audio adjustment value corresponding to the sensed external light amount; And correcting the input video and audio signals according to the detected video adjustment value and the audio adjustment value.

The image adjustment value and the audio adjustment value according to the external light amount are stored as a look up table.

The image adjustment value includes a brightness and contrast adjustment value, a color adjustment value, and a color density adjustment value corresponding to the external light amount.

The voice adjustment value adjusts a volume level by changing a dynamic range of an input voice signal in response to the external light amount.

Correcting the input video signal,

Converting the input image signal into R, G, and B signals and detecting brightness, contrast, hue and color saturation; Detecting brightness and contrast adjustment values, color adjustment values, and color density adjustment values corresponding to the external light amount; And adjusting and applying the brightness and contrast adjustment value, the color adjustment value, and the color intensity adjustment value to the brightness, contrast, hue and color saturation of the detected input image, respectively. Is done.

When the amount of external light is greater than the reference value, the brightness adjustment value b (x, y)> 0 and the contrast adjustment value Luminance (x, y) * hef (a)> 0.

When the amount of external light is smaller than the reference value, the brightness adjustment value b (x, y) <0 and the contrast adjustment value Luminance (x, y) * hef (a) <0.

The color adjustment value may be corrected to a color opposite to a specific color of the external light source.

When the external light amount is larger than the reference value, the color density adjustment value c (x, y)> 0, and when the external light amount is smaller than the reference value, the color density adjustment value c (x, y) <0. It features.

When the external light amount is larger than the reference value, the voice adjustment value Audio (x) * hef (e)> 0, and when the external light amount is lower than the reference value, the voice adjustment value Audio (x) * hef (e) It is characterized by being <0.

The method may further include setting an automatic viewing environment mode according to the external light amount.

The present invention has the effect of actively adapting to the environment outside the TV, that is, the brightness of the bright and dark lighting to provide the viewer with the best video and audio.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to include a certain component, it means that it may further include other components, except to exclude other components unless specifically stated otherwise. In addition, terms such as '.. part', '.. module' described in the specification means a unit for processing at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

1 is a block diagram showing the configuration of a video display device according to the present invention. The image display device is any one of a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), and an electroluminescent element (EL).

The tuner 1010 tunes and receives a broadcast signal of a channel selected by a user among broadcast signals received through an antenna.

The demultiplexer 1020 separates the video, audio, and data streams from the broadcast signal received through the tuner 1010, respectively.

The separated audio, video and data streams at the demultiplexer 1020 are decoded at the audio decoder 1030 / video decoder 1040 and the data decoder 1050, respectively.

The image and voice corrector 1200 according to the present invention includes a voice processor 1210 and an image processor 1230 and corrects and processes the decoded audio and video signals under the control of the controller 1060. The image and voice corrector 1200 adjusts the audio signal and the video signal by the voice processor 1210 and the image processor 1230 by applying a preset adjustment value according to the brightness intensity output from the optical sensor 1100.

The voice processed by the voice processor 1210 is amplified and output through the speaker.

The display 1110 displays an image processed by the image processor 1230.

The optical sensor 1100 detects the ambient illumination light in which the liquid crystal display panel is installed, measures the intensity of the brightness, and outputs it as a voltage value. At this time, the optical sensor 1100 is a sensor for measuring the amount of light according to the natural light and the illumination around the place where the liquid crystal display panel is installed may be formed of a photodiode, a photo transistor, a photo IC, or a CCD image sensor, yellow light sensor The ambient light is detected using two sensors, a light sensor and a cyan light sensor. The analog voltage output from the light sensor 1100 is converted into digital data and supplied to the controller 1060 as a light amount detection value.

Table 1 illustrates an output voltage ratio (Ye / Cy) between an output of a yellow light sensor and an output of a cyan light sensor of an ambient light source of the image display device according to an exemplary embodiment of the present invention.

Standard white and ambient light source of video display Ye / Cy D ₆₅ 0.924 9300K + 27MPCD 0.813 Incandescent light 1.501 Fluorescent lamp 1.025

The signal input unit 1080 receives a user's request command as a key signal. According to the present invention, a signal for selecting an automatic viewing environment mode is received.

The controller 1060 controls the driving of the overall image display device and receives the selection signal from the signal input unit 1080 to set the automatic viewing environment mode. In addition, the controller 1060 detects an image adjustment value and an audio adjustment value corresponding to the light amount detection value measured by the light sensor 1100 from a pre-stored table, and inputs the image adjustment value to the image and audio correction unit 1200.

The memory 1070 stores the video adjustment value and the audio adjustment value corresponding to the light amount detection value as a look-up table.

The OSD processor 1090 generates menus and OSD data in the automatic viewing environment mode and outputs the same through the display 1110.

2 is a block diagram illustrating an image and audio controller based on an optical sensor measurement according to an exemplary embodiment of the present invention.

The RGB demux 1231 receives decoded image data and separates the decoded image data into R, G, and B signals.

The LHS converter 1232 converts to Luminance, Hue, and Saturation using the R, G, and B signals output from the RGB demux 1231, respectively. Specifically, the LHS converter 1232 converts the R, G, and B signals into luminance representing brightness and contrast according to Equation (1).

In addition, the LHS converter 1232 converts the R, G, and B signals into Hue representing colors by the equation (2).

,

,

, 여기서 N은 360도를 3개의 영역으로 분리한 것을 나타낸다.

Where N represents 360 degrees divided into three regions.

The LHS converter 1232 then converts the R, G, and B signals into saturation representing the color density by the equation (3).

Luminance, Hue, and Saturation converted by the LHS converter 1232 are corrected by the image adjustment values C _VL , C _VH, and C _VS depending on the brightness intensity of the external light source. Specifically, the Luminance processor 1233 adjusts the contrast using a hef (a) filter, which is an image adjustment value (C _VL ) applied to the luminance of the original image according to the external brightness, and the constant b (x, y Brightness correction is performed using the following equation, which is expressed by Equation 4 below.

,여기서 hef(a)는 명암 조정 값이고, b(x,y)는 밝기 조정 값을 나타내고 limit 255[]함수는 255 단계로 영상을 양자화한 경우 최대 포화 값이 255를 초과하지 않게 제한한 것이다.

Where hef (a) is the contrast adjustment value, b (x, y) is the brightness adjustment value, and the limit 255 [] function limits the maximum saturation value not to exceed 255 when the image is quantized in 255 steps. .

Here, when the external light source is brighter than the reference value, the brightness adjustment value is b (x, y)> 0, and the contrast adjustment value is Luminance (x, y) * hef (a)> 0. On the other hand, when the external light source is darker than the reference value, the brightness adjustment value is b (x, y) <0, and the contrast adjustment value is Luminance (x, y) * hef (a) <0.

The Hue processor 1234 corrects the color of the original image according to the color of the external light source. At this time, the image of natural color is output by correcting to a color opposite to a specific color of the light source using Equation 5.

The saturation processor 1235 adjusts the color depth of the original image using Equation 6 according to the brightness of the external light source.

,

,

Where c (x, y) is the color density adjustment value and according to an embodiment of the present invention, when the external light source is brighter than the reference value, the color density adjustment value c (x, y)> 0, and the external light source is darker than the reference value In this case, the color density adjustment value c (x, y) < 0.

The RGB converter 1236 converts the image signals corrected by the brightness and contrast adjustment values, the color adjustment values, and the color depth adjustment values from the Luminance processor 1233, the Hue processor 1234, and the Saturation processor 1235 to R, G, and B. Convert to data. The RGB mux 1237 is then processed into a predetermined form of the adjusted video signal and output.

The audio dynamic processor 1211 receives the decoded voice signal and corrects the dynamic range of the input voice using Equation 7 according to the filter hef (e), which is a voice adjustment value corresponding to the brightness of the external light source.

,여기서 외부 광원이 기준 값보다 밝은 경우, Audio(x)*hef(e) > 0이되고, 외부 광원이 기준 값보다 어두운 경우, Audio(x)*hef(e) < 0이 되어 밝은 환경에서는 음성의 다이내믹 레인지가 커지게 조정하고, 어두운 환경에서는 작아지도록 적응적으로 음성 신호를 조정하여 출력한다.

Here, if the external light source is brighter than the reference value, Audio (x) * hef (e)> 0, and if the external light source is darker than the reference value, Audio (x) * hef (e) <0, The dynamic range of the voice is adjusted to be large, and the voice signal is adaptively adjusted so as to be smaller in a dark environment and output.

3 is a flowchart illustrating a method of adjusting an image and an audio according to external brightness according to an exemplary embodiment of the present invention.

The change in the external environment, that is, the brightness of the external light source is sensed using the optical sensor mounted in the image display device (S101). At this time, the brightness intensity of the external light source is detected.

The image and audio adjustment values corresponding to the brightness of the currently detected external light source are detected from the look-up table that maps the image adjustment value and the audio adjustment value corresponding to the brightness intensity of the external light source (S102).

 The video and audio signals input from the outside are converted into R, G, and B signals and corrected by applying the detected video adjustment value and the audio adjustment value (S103).

A corrected video and audio signal adaptive to external brightness is output (S104).

4 is a flowchart illustrating a video and audio adjustment method according to an automatic viewing environment mode according to an embodiment of the present invention.

It is determined whether the automatic viewing environment mode of the video display device is set (S401). The automatic viewing environment mode is input and set through a user interface such as a key signal or a menu.

The brightness of the external light source is sensed using the optical sensor (S402). At this time, the voltage value corresponding to the brightness intensity of the light source is measured and converted into the light quantity detection value.

The image adjustment value and the audio adjustment value corresponding to the brightness intensity of the external light source are detected from the stored look-up table (S403).

The video signal and the audio signal input from the outside are decoded to convert the video signal into R, G and B signals (S404).

Luminance representing brightness and contrast, Hue representing color, and color saturation are obtained from the R, G, and B signals of the converted original image, and the detected image adjustment values (C _VL , C _VH and C _V ) are applied, respectively. Correction is made (S405).

 At the same time, a dynamic range of the input voice is adjusted by receiving the decoded audio signal and applying a filter hef (e), which is a voice adjustment value corresponding to the brightness of the external light source (S406).

The video and audio signals adaptively corrected for the brightness of the external light source are output (S407).

5 (M0 to M5) are exemplary views of images corrected according to external brightness according to an exemplary embodiment of the present invention.

As shown in FIG. 5, the original image input from the outside (M0) becomes a red color as a whole under the influence of illumination, such as M1, in a dark red light (red incandescent light system) in the room.

The Hue value is corrected in the red light of M3 by using a color adjustment value as in the image of M2 using the light amount detection value in the red light.

Then, by using the light amount detection value in the red light as shown in the image of M4 by applying the brightness and brightness (Luminance) adjustment value and outputs the image whose luminance value is corrected in the red light of M5.

On the other hand, the terms used in the present invention (terminology) are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of the skilled person in the relevant field, the definitions of which are used throughout the present invention. It should be based on.

The present invention is not limited to the above-described embodiments and may be variously modified and changed by those skilled in the art, which are included in the spirit and scope of the present invention as defined in the appended claims.

1 is a block diagram showing the configuration of a video display device according to the present invention;

2 is a block diagram illustrating an image and audio control unit according to an optical sensor measurement according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a method of adjusting an image and a sound according to external brightness according to an embodiment of the present invention.

4 is a flowchart illustrating a video and audio adjustment method according to an automatic viewing environment mode according to an embodiment of the present invention.

5 (M0 to M5) is an exemplary view corrected according to the external brightness according to an embodiment of the present invention

* Description of the symbols for the main parts of the drawings *

1010. Tuner 1020. Demultiplexer

1030. Audio Decoder 1040. Video Decoder

1050. Data Decoder 1060. Control Unit

1070. Memory 1080. Signal input unit.

1090.OSD Processing Unit 1100.Light Sensor

1110. Display unit 1200. Audio and video correction unit

Claims (24)

Sensing external light quantity; Detecting a pre-stored image adjustment value and an audio adjustment value corresponding to the sensed external light amount; And Correcting an input image and an audio signal according to the detected image adjustment value and the audio adjustment value. The method of claim 1, And a video adjustment value and an audio adjustment value according to the external light amount as a look-up table. 3. The method of claim 2, And the image adjustment value comprises a brightness and contrast adjustment value, a color adjustment value, and a color density adjustment value corresponding to the external light amount. 3. The method of claim 2, And adjusting the volume level by changing a dynamic range of an input audio signal in response to the external light amount. The method of claim 1, Correcting the input video signal, Converting the input image signal into R, G, and B signals and detecting brightness, contrast, hue and color saturation; Detecting brightness and contrast adjustment values, color adjustment values, and color density adjustment values corresponding to the external light amount; And And adjusting and applying the brightness and contrast adjustment value, the color adjustment value, and the color intensity adjustment value to the brightness, contrast, color, and color intensity of the detected input image, respectively. Image and audio control method of the video display device using an optical sensor, characterized in that. The method of claim 5, When the amount of external light is greater than the reference value, the brightness adjustment value b (x, y)> 0 and the contrast adjustment value Luminance (x, y) * hef (a)> 0. How to adjust video and audio on display device. The method of claim 5, When the external light amount is smaller than the reference value, the brightness adjustment value b (x, y) <0 and the contrast adjustment value Luminance (x, y) * hef (a) <0. How to adjust video and audio on display device. The method of claim 5, And adjusting the color adjustment value to a color opposite to a specific color of the external light source. The method of claim 5, When the external light amount is larger than the reference value, the color density adjustment value c (x, y)> 0, and when the external light amount is smaller than the reference value, the color density adjustment value c (x, y) <0. A video and audio adjusting method of a video display device using an optical sensor. The method of claim 1, When the external light amount is larger than the reference value, the voice adjustment value Audio (x) * hef (e)> 0, and when the external light amount is lower than the reference value, the voice adjustment value Audio (x) * hef (e) <0 and video adjusting method of the video display device using an optical sensor, characterized in that <0. The method of claim 1, And setting an automatic viewing environment mode according to the external light amount. An optical sensor for sensing an external light amount; A memory for storing an image adjustment value and an audio adjustment value according to the external light amount as a look-up table; A controller for detecting a stored image adjustment value and an audio adjustment value corresponding to the sensed external light amount; And And an image and audio controller using an optical sensor including an image and audio correction unit configured to correct an input image and an audio signal according to the detected image adjustment value and the audio adjustment value. The method of claim 12, And the image adjustment value comprises a brightness and contrast adjustment value, a color adjustment value, and a color intensity adjustment value corresponding to the external light amount. The method of claim 12, And the audio adjustment value adjusts a volume level by changing a dynamic range of an input audio signal in response to the external light amount. The method of claim 12, The video and audio correction unit, An RGB demux for converting the input image signal into R, G, and B signals; An LHS converter for detecting brightness, contrast, hue, and saturation of the R, G, and B signals; And A processor that applies and corrects the brightness and contrast adjustment values, the color adjustment values, and the color intensity adjustment values input from the controller to the brightness, contrast, hue, and color saturation of the input image, respectively. And a video display device using a light sensor, characterized in that the image and sound are adjusted. The method of claim 15, The processor for correcting the brightness and contrast of the input image

, <hef (a) is the contrast adjustment value, b (x, y) is the brightness adjustment value>

A video display device for adjusting video and audio using an optical sensor, characterized in that the equation is used. The method of claim 16, When the external light amount is greater than the reference value, the brightness adjustment value b (x, y)> 0, the contrast adjustment value Luminance (x, y) * hef (a)> 0, and the external light amount is less than the reference value And the brightness adjustment value b (x, y) <0 and the contrast adjustment value Luminance (x, y) * hef (a) <0. . The method of claim 15, The processing unit for correcting the color (Hue) of the input image

, <d (x, y) is the color adjustment value> A video display device for adjusting video and audio using an optical sensor, characterized in that the equation is used. The method of claim 18, And adjusting the image and audio using an optical sensor, wherein the color adjustment value is corrected to a color opposite to a specific color of an external light source. The method of claim 15, A processing unit for correcting the color saturation (Saturation) of the input image

, <c (x, y) is the color density adjustment value> A video display device for adjusting video and audio using an optical sensor, characterized in that the use of a formula. The method of claim 20, When the external light amount is larger than the reference value, the color density adjustment value c (x, y)> 0, and when the external light amount is smaller than the reference value, the color density adjustment value c (x, y) <0. A video display device for adjusting video and audio using an optical sensor. The method of claim 12, The video and audio correction unit,

, <hef (e) is the negative adjustment value> And an audio dynamics processor configured to correct an audio signal according to an external brightness by using an equation. 23. The method of claim 22, When the external light amount is larger than the reference value, the voice adjustment value Audio (x) * hef (e)> 0, and when the external light amount is lower than the reference value, the voice adjustment value Audio (x) * hef (e) < A video display device for adjusting video and audio using an optical sensor, characterized in that zero. The method of claim 12, And the controller is configured to adjust an image and audio using an optical sensor, characterized in that for setting an automatic viewing environment mode in which the image and audio are corrected according to the external light quantity.

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