KR20130088673A - Dispaly apparatus and signal processing device and method for providing backlight - Google Patents

Dispaly apparatus and signal processing device and method for providing backlight Download PDF

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KR20130088673A
KR20130088673A KR1020120010058A KR20120010058A KR20130088673A KR 20130088673 A KR20130088673 A KR 20130088673A KR 1020120010058 A KR1020120010058 A KR 1020120010058A KR 20120010058 A KR20120010058 A KR 20120010058A KR 20130088673 A KR20130088673 A KR 20130088673A
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image
image frame
contents
dimming signal
content
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KR1020120010058A
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Korean (ko)
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김지원
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삼성전자주식회사
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Publication of KR20130088673A publication Critical patent/KR20130088673A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00—Image analysis
    • G06T7/40—Analysis of texture
    • G06T7/41—Analysis of texture based on statistical description of texture
    • G06T7/44—Analysis of texture based on statistical description of texture using image operators, e.g. filters, edge density metrics or local histograms
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Optics & Photonics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

Disclosed are a display apparatus, a signal processing apparatus, and a method for providing a backlight. The display device according to the present invention includes an input unit for receiving a plurality of different contents, an image processing unit for performing image processing on the plurality of contents, and analyzing the luminance characteristics of the image frames of each of the plurality of contents, A display processor for generating a dimming signal corresponding to a luminance characteristic, a display panel alternately displaying image frames of a plurality of contents, a backlight unit for providing a backlight to the display panel, and an image frame of each content The display timing includes a backlight driver for driving the backlight unit according to the dimming signal.

Description

Dispaly apparatus and signal processing device and method for providing backlight

The present invention relates to a display apparatus, a signal processing apparatus, and a method, and more particularly, to a display apparatus, a signal processing apparatus, and a method capable of controlling a dimming signal corresponding to a plurality of contents.

Various types of electronic products are being developed and distributed by the development of electronic technology. In particular, various display devices such as TVs, mobile phones, PCs, notebook PCs, and PDAs are used in most households.

As the use of display devices has increased, the user needs for more diverse functions have also increased. As a result, the efforts of manufacturers to meet user needs have increased, and products including new features such as the provision of 3D contents are emerging one after another.

In addition, in recent years, a development effort has been made for a display device in which a plurality of contents are simultaneously provided and a plurality of users can view different contents. In the case of such a display device, a plurality of different contents are simultaneously provided to output a dimming signal corresponding to one of the plurality of contents.

That is, in a display apparatus that provides a plurality of contents simultaneously, a dimming signal for a plurality of contents is set as a dimming signal of a specific content, thereby providing a backlight having the same luminance size for all contents. In addition, such a display device has a problem in that the dimming signal of all the contents is changed in the same manner when the user who is watching one of the plurality of contents changes the luminance magnitude associated with the backlight.

The present invention has been made in accordance with the above-described needs, and an object of the present invention is to provide a backlight suitable for a plurality of contents.

According to an aspect of the present invention, there is provided a display apparatus including an input unit for receiving a plurality of different contents, an image processor for performing image processing on the plurality of contents, and an image of each of the plurality of contents. A display processor for analyzing a luminance characteristic of a frame and generating a dimming signal corresponding to the luminance characteristic of each image frame; a display panel unit for alternately displaying image frames of the plurality of contents; and a display panel unit. And a backlight driver for driving the backlight unit according to the dimming signal at a display timing of an image frame of each content.

The image processor generates an image frame of each of the plurality of contents, combines the generated image frames, and the display processor applies an image analysis window having a preset size to the combined image frames. The luminance characteristic of the image frame of each content may be calculated, and a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame may be generated.

The image processor may generate an image frame of each of the plurality of contents, combine the generated image frames, and the display processor may separate the image frame of each of the contents from the combined image frame, and may separate the image frames. The luminance characteristic of each image frame may be calculated, and a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame may be generated.

The display apparatus may further include a UI unit for receiving a brightness adjustment command and a controller for controlling the display processor to adjust the duty of the dimming signal according to the brightness adjustment command.

The display processor may adjust the duty of the dimming signal to adjust the luminance to a size corresponding to the luminance adjustment command within a maximum luminance value range of the image frame of each content.

Meanwhile, according to an embodiment of the present disclosure, in the backlight providing method of the display apparatus, the method may include receiving a plurality of different contents, performing image processing on the plurality of contents, and performing the plurality of contents. Analyzing the luminance characteristics of each image frame, generating a dimming signal corresponding to the luminance characteristics for each image frame, and alternately displaying the image frames of the plurality of contents, at the display timing of each image frame, And driving a backlight unit according to the dimming signal to provide a backlight having a size corresponding to each image frame.

The performing of the image processing may include generating an image frame of each of the plurality of contents, combining the generated image frames, and generating the dimming signal, with respect to the combined image frame. After calculating the luminance characteristics of the image frames of the respective content by applying the image analysis window of the image content, the dimming signal having a duty corresponding to the calculated luminance characteristics for each image frame may be generated.

The performing of the image processing may include generating an image frame of each of the plurality of contents, combining the generated image frames, and generating the dimming signal, from each of the combined image frames. After dividing the image frame, the luminance characteristic of the image frame of each content may be calculated, and a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame may be generated.

The method may further include receiving a luminance adjustment command and adjusting a duty of the dimming signal to adjust the luminance to a size corresponding to the luminance adjustment command within a maximum luminance value range of the image frame of each content. have.

Meanwhile, according to an embodiment of the present disclosure, the signal processing apparatus may analyze an image processor for performing image processing on a plurality of different contents and luminance characteristics of image frames of each of the plurality of contents, and analyze the image for each image frame. And a display processing unit configured to generate a dimming signal corresponding to the luminance characteristic and provide a dimming signal corresponding to each image frame to the backlight unit in synchronization with the display timing of the image frame.

The image processor generates an image frame of each of the plurality of contents, combines the generated image frames, and the display processor applies an image analysis window having a preset size to the combined image frames. The luminance characteristic of the image frame of each content may be calculated, and a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame may be generated.

The image processor may generate an image frame of each of the plurality of contents, combine the generated image frames, and the display processor may separate the image frame of each content from the combined image frame, The luminance characteristics of each of the separated image frames may be calculated, and a dimming signal having a duty corresponding to the luminance characteristics calculated for each image frame may be generated.

Meanwhile, according to an embodiment of the present invention, in the signal processing method for providing a backlight in a signal processing apparatus, performing image processing on a plurality of different contents, and luminance of image frames of each of the plurality of contents Analyzing the characteristics, generating a dimming signal corresponding to the luminance characteristic analyzed for each image frame, and providing a dimming signal corresponding to each image frame to the backlight unit in synchronization with the display timing of the image frame. do.

The performing of the image processing may include generating an image frame of each of the plurality of contents, combining the generated image frames, and generating the dimming signal. Calculating a luminance characteristic of an image frame of each content by using a sized image analysis window and generating a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame; have.

The performing of the image processing may include generating an image frame of each of the plurality of contents, combining the generated image frames, and generating the dimming signal, from the combined image frame. And dividing the image frames, calculating a luminance characteristic of each of the separated image frames, and generating a dimming signal having a duty corresponding to the luminance characteristics calculated for each image frame. .

According to various embodiments of the present disclosure, the display device may drive different backlights for each of the plurality of contents according to the dimming signal for the plurality of contents. Furthermore, the display device according to the present invention may adjust the duty of the dimming signal only for the content selected from the user among the plurality of contents.

1 is a block diagram of a signal processing apparatus according to an embodiment of the present invention;
2 is a flowchart of a signal processing method for providing a backlight in a signal processing apparatus according to an embodiment of the present invention;
3 is a block diagram of a display device according to an embodiment of the present invention;
4 is an exemplary diagram of a display device generating a dimming signal by applying an image analysis window according to an embodiment of the present invention;
5 is an exemplary diagram of a display device that generates a dimming signal by separating the combined image frames according to an embodiment of the present invention;
6 is a flowchart of a method of providing a backlight in a display device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention.

1 is a block diagram of a signal processing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the signal processing apparatus includes an image processor 110 and a display processor 120. The image processor 110 performs image processing on a plurality of different contents. The display processor 120 analyzes the luminance characteristics of the image frames of the plurality of contents processed by the image processor 110 and generates a dimming signal corresponding to the luminance characteristics analyzed for each image frame. . Thereafter, the display processor 120 provides a dimming signal corresponding to each image frame to the backlight unit (not shown) in synchronization with the timing at which the image frames of the plurality of contents are displayed.

In detail, the image processor 110 generates an image frame of each of the plurality of contents input from the outside, and combines the generated image frames so that they can be displayed alternately. According to an exemplary embodiment, the image processor 110 decodes video data of a plurality of input contents and then performs up or down scaling in accordance with the displayed screen size. As such, since a technique for generating an image frame for the input content is a known technique, a detailed description thereof will be omitted. When an image frame for each of the plurality of contents is generated, the image processor 110 combines the image frames for each of the plurality of generated contents.

When image frames for each of the plurality of contents are combined, the display processor 120 may generate a dimming signal corresponding to each image frame through the following embodiments. According to an exemplary embodiment, the display processor 120 calculates a luminance characteristic of an image frame of each content by applying an image analysis window having a predetermined size to the combined image frame. According to another exemplary embodiment, the display processor 120 separates an image frame of each content from the combined image frame through the image processor 110 and calculates luminance characteristics of the image frame of each of the separated content.

As such, when the luminance characteristics of the image frames of the respective contents are calculated by applying the image analysis window or by separating the combined image frames, the display processor 120 corresponds to the duty corresponding to the luminance characteristics calculated for each image frame of the contents. A dimming signal having a duty may be generated.

According to an exemplary embodiment, the display processor 120 analyzes the histogram for each color signal of each image frame and checks the maximum grayscale value of the grayscale of the color signal for each image frame. Thereafter, the display processor 120 may calculate luminance characteristics by dividing each grayscale maximum range value by the maximum gray scale value identified for each image frame. As such, when the luminance characteristic of each image frame is calculated, the display processor 120 may generate a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame.

However, the present invention is not limited thereto, and the dimming signal corresponding to the calculated luminance characteristic may be generated by calculating the luminance characteristic of each image frame by another method.

As such, when a dimming signal of an image frame for each content is generated, the display processor 120 synchronizes a dimming signal corresponding to each image frame with a backlight unit (not shown) in synchronization with a timing at which each image frame is displayed. To provide. Accordingly, the backlight unit (not shown) may differently provide the backlight to the display panel that alternately displays each image frame by using the dimming signal provided from the display processor 120.

Hereinafter, a signal processing method for providing a backlight in the signal processing apparatus will be described in detail.

2 is a flowchart of a signal processing method for providing a backlight in a signal processing apparatus according to an embodiment of the present invention.

As illustrated in FIG. 2, when a plurality of different contents are input from the outside, the signal processing apparatus performs image processing on the plurality of different input contents (S210). When image processing is performed on a plurality of contents, the signal processing apparatus analyzes the luminance characteristics of the image frames of each of the plurality of image-processed contents and generates a dimming signal corresponding to the luminance characteristics analyzed for each image frame (S220). S230). Thereafter, the signal processing apparatus provides a dimming signal corresponding to each image frame to the backlight unit in synchronization with the timing at which the image frames of the plurality of contents are displayed (S240).

Specifically, the signal processing apparatus generates an image frame of each of a plurality of contents input from the outside, and combines the generated image frames so that they can be displayed alternately.

According to an exemplary embodiment, the signal processing apparatus performs decoding on video data for a plurality of input contents, and then performs up or down scaling in accordance with a displayed screen size. As such, since a technique for generating an image frame for the input content is a known technique, a detailed description thereof will be omitted. When an image frame for each of the plurality of contents is generated, the signal processing apparatus combines the image frames for each of the generated plurality of contents.

When image frames for each of the plurality of contents are combined, the signal processing apparatus may generate a dimming signal corresponding to each image frame through the following embodiments. According to an embodiment, the signal processing apparatus may calculate a luminance characteristic of an image frame of each content by applying an image analysis window having a predetermined size to the combined image frame. According to another embodiment, the signal processing apparatus may separate an image frame of each content from the combined image frame, and calculate luminance characteristics of the image frame of each of the separated content.

As such, when the luminance characteristics of the image frames of the respective contents are calculated by applying the image analysis window or by separating the combined image frames, the signal processing apparatus may determine a duty corresponding to the luminance characteristics calculated for each image frame of the respective contents. The branch may generate a dimming signal.

According to an exemplary embodiment, the signal processing apparatus analyzes a histogram for each color signal of each image frame and checks the maximum grayscale value of the grayscale of the color signal for each image frame. Subsequently, the signal processing apparatus may calculate a luminance characteristic by dividing each grayscale maximum range value by the maximum gray scale value identified for each image frame.

When the luminance characteristic of the image frame is calculated through the above embodiment, the signal processing apparatus may generate a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame. However, the present invention is not limited thereto, and the dimming signal corresponding to the calculated luminance characteristic may be generated by calculating the luminance characteristic of each image frame by another method.

As such, when a dimming signal of an image frame for each content is generated, the signal processing apparatus provides a dimming signal corresponding to each image frame to the backlight unit in synchronization with a timing at which each image frame is displayed. Accordingly, the backlight unit may differently provide a backlight to a display panel that alternately displays each image frame using a dimming signal provided by a signal processing apparatus.

Until now, the signal processing method for providing a backlight to a display panel displaying a plurality of contents in the signal processing apparatus according to the present invention has been described in detail. Hereinafter, a method of providing a different backlight for each of a plurality of contents in the display device according to the present invention will be described in detail.

3 is a block diagram of a display apparatus according to an embodiment of the present invention.

As shown in FIG. 3, the display apparatus includes an input unit 310, an image processor 320, a display processor 330, a display panel unit 340, a backlight driver 350, and a backlight unit 360. The input unit 310 receives a plurality of different contents. According to an exemplary embodiment, the input unit 310 that receives a plurality of different contents may be configured to receive a plurality of different contents. The input unit 310 may receive a plurality of different contents from a broadcasting station transmitting content related to a broadcast program using a broadcast network or a web server transmitting content using the Internet. In addition, the input unit 310 may receive content from various recording medium reproducing apparatuses provided in or connected to the display apparatus. The recording medium playback device refers to a device that plays back content stored in various types of recording media such as CD, DVD, hard disk, Blu-ray disk, memory card, USB memory,

In an embodiment of receiving content from a broadcasting station, the input unit 310 may be implemented in a form including a tuner (not shown), a demodulator (not shown), an equalizer (not shown), and the like. When receiving content from a source device such as a web server or an external device such as a DVD PC, the input unit 310 may receive content through at least one of SCART, AV, HDMI, COMPONENT, and USB interfaces. .

The image processor 320 performs image processing on a plurality of contents input through the input unit 310. The display processor 330 analyzes the luminance characteristics of the image frames of the plurality of contents processed by the image processor 320 and generates a dimming signal corresponding to the luminance characteristics analyzed for each image frame. The display panel 340 alternately displays image frames of each of the plurality of contents processed through the image processor 320, and the backlight unit 250 alternately displays the image frames. 340 provides a backlight. In addition, the backlight driver 260 drives the backlight unit 250 to provide a backlight according to the dimming signal generated from the display processor 330 at the timing when the image frame of each content is displayed through the display panel unit 340. Let's do it.

In detail, the image processor 320 generates an image frame of each of a plurality of different contents input through the input unit 310, and then combines the generated image frames. According to an embodiment, the image processor 320 separates video data and audio data included in each content. Thereafter, the image processor 320 decodes the video data of the corresponding content according to the input content type, and then up or down scales the image frame for the video data for each content according to the screen size of the display panel 340. To perform. As such, when scaling of image frames for each content is performed, the image processor 320 outputs the combined image frames for each content.

When the image frames for each content are combined and output through the image processor 320, the display processor 330 may generate a dimming signal related to the image frame for each content according to the following embodiments. According to an exemplary embodiment, the display processor 330 applies an image analysis window having a predetermined size to the image frames combined through the image processor 320 to calculate a luminance characteristic of the image frame of each content, A dimming signal having a duty corresponding to luminance characteristics of each image frame of each content may be generated.

As described above, a display apparatus including a display processor 330 for generating a dimming signal of an image frame of each content by applying an image analysis window will be described in more detail with reference to FIG. 4.

4 is an exemplary diagram of a display device generating a dimming signal by applying an image analysis window according to an embodiment of the present invention.

As illustrated in FIG. 4, when the first content 311 and the second content 312 are input through the input unit 310, the image processor 320 may input the first content 311 as described above. And image processing of the second content 312 to generate an image frame of each of the first content 311 and the second content 312. Thereafter, the image processor 320 outputs the combined image frame 321 by combining the generated image frames of each of the first content 311 and the second content 312. For example, when the first content 311 and the second content 312 having a frame rate of 60 Hz are input, respectively, the image processor 320 may generate an image frame of each of the first content 311 and the second content 312. May be combined and output as an image frame 321 having a frame rate of 60 Hz.

As such, when the image frames 321 are combined, the display processor 330 applies the combined image frame window 321 having a predetermined size. As illustrated, the display processor 330 calculates luminance characteristics of each image frame 331 and 332 by applying the image frame windows 10 and 20 having a predetermined size to the combined image frame 321. According to an exemplary embodiment, the display processor 330 analyzes a histogram for each color signal of each of the image frames 331 and 332 to which the image frame window is applied, and calculates the maximum grayscale value of the gray scale of the color signal for each of the image frames 331 and 332, respectively. Check it. Thereafter, the display processor 330 may calculate luminance characteristics by dividing each grayscale maximum range value by the maximum gray scale value identified for each of the image frames 331 and 332.

As such, when the luminance characteristics of the image frames 331 and 332 are calculated, the display processor 330 may generate a dimming signal having a duty corresponding to the luminance characteristics calculated for each of the image frames 331 and 332. In addition, the display processor 330 adjusts and outputs the frame rates of the image frames 331 and 332 to a frame rate that can be displayed alternately through the display panel 340. According to an exemplary embodiment, when the frame rate output through the display panel unit 340 is 120 Hz and the frame rate of each image frame 331 or 332 is 60 Hz, the display processor 330 may display the frame of each image frame 331 or 332. The output can be adjusted by adjusting the rate from 60Hz to 120Hz.

Meanwhile, according to another exemplary embodiment, the display processor 330 separates an image frame of each content from the combined image frame through the image processor 320, and calculates luminance characteristics of each of the separated image frames. A dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame may be generated. As described above, a display apparatus including a display processor 330 that separates the combined image frame and generates a dimming signal of the image frame of each content will be described in more detail with reference to FIG. 5.

5 is an exemplary diagram of a display device for generating a dimming signal by separating the combined image frame according to an embodiment of the present invention.

As illustrated in FIG. 5, when the first content 311 and the second content 312 are input through the input unit 310, the image processor 320 may input the first content 311 as described above. And image processing of the second content 312 to generate an image frame of each of the first content 311 and the second content 312. Thereafter, the image processor 320 outputs the combined image frame 321 by combining the generated image frames of each of the first content 311 and the second content 312. For example, when the first content 311 and the second content 312 having a frame rate of 60 Hz are input, respectively, the image processor 320 may generate an image frame of each of the first content 311 and the second content 312. May be combined and output as an image frame 321 having a frame rate of 60 Hz.

As such, when the image frames 321 are combined, the display processor 330 separates the combined image frames 321 into respective image frames 331 and 332. Thereafter, the display processor 330 calculates luminance characteristics of the image frame 331 of the separated first content 311 and the image frame 332 of the second content 312. As described above, the display processor 330 analyzes the histogram for each color signal of each of the separated image frames 331 and 332, and checks the maximum grayscale value of the grayscale of the color signal for each of the image frames 331 and 332, respectively. do. Thereafter, the display processor 330 may calculate luminance characteristics by dividing each grayscale maximum range value by the maximum gray scale value identified for each of the image frames 331 and 332.

As such, when the luminance characteristics of the image frames 331 and 332 are calculated, the display processor 330 may generate a dimming signal having a duty corresponding to the luminance characteristics calculated for each of the image frames 331 and 332. In addition, the display processor 330 adjusts and outputs the frame rates of the image frames 331 and 332 to a frame rate that can be displayed alternately through the display panel 340. According to an exemplary embodiment, when the frame rate output through the display panel unit 340 is 120 Hz and the frame rate of each image frame 331 or 332 is 60 Hz, the display processor 330 may display the frame of each image frame 331 or 332. The output can be adjusted by adjusting the rate from 60Hz to 120Hz.

As shown in FIG. 4 or FIG. 5, when the frame rate of each of the plurality of content frames is adjusted and output through the display processor 330, the display panel unit 340 displays the images of the plurality of contents of which the frame rate is adjusted. Display frames alternately. Meanwhile, as described above, the backlight unit 360 provides a backlight at a timing at which image frames of each of a plurality of contents are alternately displayed through the display panel 340 according to a driving command of the backlight driver 350. do.

In detail, the backlight driver 350 drives the backlight unit 360 according to a dimming signal for the image frame of each content generated through the display processor 330 at the display timing of the image frame of each content. According to an embodiment, as described with reference to FIG. 4 or FIG. 5, the backlight processor 230 generates a dimming signal having a 50% duty with respect to the image frame of the first content, and generates 20 dimming signals with respect to the image frame of the second content. It is possible to generate a dimming signal having a duty of%. When the dimming signal is generated, the backlight driver 350 outputs the dimming signal for each image frame of the first and second contents to the backlight unit 360 in response to the timing at which the image frames of the first and second contents are displayed. do.

Accordingly, the backlight unit 360 provides the display panel unit 340 with a backlight having a 50% duty at the timing when the image frame of the first content is displayed, and 20% at the timing when the image frame of the second content is displayed. Provides a backlight having a duty. Accordingly, the display panel unit 340 may alternately display the image frame of the first content and the image frame of the second content having different backlights.

On the other hand, the display device according to the present invention, the dimming of the image frame of at least one of the plurality of contents in accordance with the luminance adjustment command input through the UI unit 370 and the UI unit 370 receiving the luminance adjustment command The controller 380 further controls the display processor 330 to adjust the duty of the signal. The display processor 330 adjusts the luminance to a size corresponding to the luminance adjustment command input through the UI unit 370 within the maximum luminance value range of the image frame of each content according to the control command of the controller 380. The duty of the dimming signal of the corresponding video frame is adjusted as much as possible.

For example, the luminance value of the image frame of each content may be adjusted to 0 to 10 levels, the duty of the dimming signal for the image frame of the first content is 50%, and the dimming signal of the image frame of the second content is 50%. Duty can be 20%. In this state in which image frames of the first and second contents are alternately displayed as the dimming signals having different dutys, the luminance adjustment command for the first contents may be input through the UI unit 370. For example, a luminance adjustment command having a luminance value of 7 may be input to the image frame of the first content through the UI unit 370. When such a brightness adjustment command is input, the display processing unit 330 adjusts the duty of the dimming signal for the image frame of the first content from 50% to a duty corresponding to the brightness adjustment command according to the control command of the controller 380. Can be. Accordingly, the display panel unit 340 may display the image frame of the first content with brightness of a bright size compared to the brightness before the brightness adjustment command is input.

Hereinafter, a method of providing a backlight differently for a plurality of contents in the display apparatus according to the present invention will be described in detail.

6 is a flowchart of a method of providing a backlight in a display device according to an embodiment of the present invention.

As shown in FIG. 6, the display apparatus receives a plurality of different contents from outside (S610). According to an exemplary embodiment, the display apparatus may receive a plurality of different contents from a broadcasting station transmitting content related to a broadcast program using a broadcast network or a web server transmitting content using the Internet. In addition, the display apparatus may receive content from various recording medium reproducing apparatuses provided in or connected to the display apparatus. Here, the recording medium reproducing apparatus refers to a device for reproducing contents stored in the recording medium in various types such as a CD, a DVD, a hard disk, a Blu-ray disk, a memory card, a USB memory, and the like.

As such, when a plurality of contents is input from at least one of a broadcasting station, a web server, and a recording medium reproducing apparatus, the display apparatus performs image processing on the plurality of input contents (S620). According to an exemplary embodiment, the display apparatus decodes video data included in each content, and performs up or down scaling of an image frame for video data of each content according to the displayed screen size. As such, when scaling of image frames for each content is performed, the display apparatus combines the scaled image frames for each content.

Thereafter, the display apparatus analyzes the luminance characteristics of the combined image frames for each content to generate a dimming signal corresponding to the luminance characteristics of the image frames for each content (S630). Such a display device may generate a dimming signal corresponding to a luminance characteristic of an image frame for each content through the following embodiments. According to an exemplary embodiment, the display apparatus calculates a luminance characteristic of an image frame of each content by applying an image analysis window having a predetermined size to the combined image frame for each content. Thereafter, the display apparatus may generate a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame of each content.

According to another embodiment, the display apparatus separates the combined image frame for each content, and then calculates luminance characteristics of the image frame of each content. Thereafter, the display apparatus may generate a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame of each content. As described above, an operation of calculating luminance characteristics by applying an image analysis window having a predetermined size to the image frames combined for each content or calculating the luminance characteristics by separating the image frames combined for each content is illustrated in FIGS. 4 and 5. Since it has been described in detail through the following detailed description will be omitted. In addition, since the method of calculating the luminance characteristic of the image frame for each content has been described with reference to FIGS. 4 and 5, the method of calculating the luminance characteristic of the image frame for each content will be omitted.

As such, when a dimming signal having a duty of an image frame for each content is generated, the display apparatus drives the backlight unit according to the dimming signal generated for each image frame of each content at a timing at which the image frame of each content is displayed. A backlight having a size corresponding to the image frame is provided (S640). According to an embodiment, a dimming signal having a 50% duty for an image frame of the first content and a dimming signal having a 20% duty for the image frame of the second content may be generated through step S630. . In this case, the display apparatus outputs a dimming signal for each image frame of the first and second contents to the backlight unit in response to the timing at which the image frames of the first and second contents are displayed. Accordingly, the backlight unit provides a backlight having a 50% duty at the timing at which the image frame of the first content is displayed, and provides a backlight having a 20% duty at the timing at which the image frame of the second content is displayed.

Thereafter, the display device alternately displays the image frames of the plurality of contents with a backlight having a size corresponding to each image frame (S660). In this case, it is preferable that the display apparatus adjusts and displays the frame rates of the plurality of content-specific image frames to a frame rate that can be output. According to an embodiment, if the frame rate of the video frame of the plurality of image-processed content is 60 Hz and the outputable frame rate is 120 Hz, the display device adjusts each of the frame rates of the video frame of the plurality of image-processed content to 120 Hz Can be displayed.

In operation S660, the display apparatus according to the present invention determines whether a brightness adjustment command is input from a user. As a result of the determination, when a brightness adjustment command is input from the user, the display apparatus adjusts the duty of the dimming signal to adjust the brightness to a size corresponding to the brightness adjustment command within the maximum brightness value range of the image frame of each content (S670). For example, the luminance value of the image frame of each content may be adjusted to 0 to 10 levels, and the duty of the dimming signal for the image frame of the first content is 50%, and the duty of the dimming signal for the image frame of the second content. Could be 20%. As described above, while the image frames of the first and second contents are alternately displayed as dimming signals having different duty, a luminance adjustment command for the first contents may be input from the user.

For example, a luminance adjustment command having a luminance value of 7 may be input from the user with respect to an image frame of the first content. When such a brightness adjustment command is input, the display device may adjust the duty of the dimming signal for the image frame of the first content to a duty corresponding to the brightness adjustment command at 50%. Therefore, the display device may display the image frame of the first content with brightness of a bright size compared to the brightness before the brightness adjustment command is input.

Meanwhile, the program for performing the method according to various embodiments of the present disclosure described above may be stored and used in various types of recording media.

Specifically, the code for performing the above-described methods may be stored in a storage medium such as a RAM (Random Access Memory), a FLASH memory, a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electronically Erasable and Programmable ROM) Such as a floppy disk, a removable disk, a memory card, a USB memory, a CD-ROM, and the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the present invention.

110,320: image processing unit 120,330: display processing unit
310: input unit 340: display panel unit
350: backlight driver 360: backlight
370: UI unit 380: control unit

Claims (15)

An input unit configured to receive a plurality of different contents;
An image processor which performs image processing on the plurality of contents;
A display processor configured to analyze luminance characteristics of image frames of each of the plurality of contents and generate a dimming signal corresponding to the luminance characteristics for each image frame;
A display panel unit configured to alternately display image frames of the plurality of contents;
A backlight unit for providing a backlight to the display panel unit; And
And a backlight driver configured to drive the backlight unit according to the dimming signal at a display timing of an image frame of each content. The method of claim 1,
Wherein the image processing unit comprises:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
The display processing unit,
A dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame by calculating a luminance characteristic of the image frame of each content by applying an image analysis window having a predetermined size to the combined image frame. Display device, characterized in that for generating. The method of claim 1,
Wherein the image processing unit comprises:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
The display processing unit,
Separating the image frames of the respective content from the combined image frame, calculating luminance characteristics of each of the separated image frames, and generating a dimming signal having a duty corresponding to the luminance characteristics calculated for each image frame Display device, characterized in that. The method of claim 1,
A UI unit for receiving a brightness adjustment command; And
A controller configured to control the display processor to adjust the duty of the dimming signal according to the brightness adjustment command;
Display device further comprises. 5. The method of claim 4,
The display processing unit,
And adjusting the duty of the dimming signal so that the luminance is adjusted to a size corresponding to the luminance adjustment command within the maximum luminance value range of the image frame of each content. In the backlight providing method of the display device,
Receiving a plurality of different contents;
Performing image processing on the plurality of contents;
Analyzing a luminance characteristic of an image frame of each of the plurality of contents and generating a dimming signal corresponding to the luminance characteristic of each image frame; And
Providing a backlight having a size corresponding to each image frame by alternately displaying the image frames of the plurality of contents, driving a backlight unit according to the dimming signal at a display timing of each image frame;
Backlight providing method comprising a. The method according to claim 6,
The step of performing the image processing includes:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
Generating the dimming signal,
The luminance characteristics of the image frames of the respective contents are calculated by applying an image analysis window having a predetermined size to the combined image frames, and then dimming having a duty corresponding to the luminance characteristics calculated for each image frame. And providing a signal. The method according to claim 6,
The step of performing the image processing includes:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
Generating the dimming signal,
After dividing the image frame of each content from the combined image frame, the luminance characteristic of the image frame of each content is calculated, and a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame. And a display device. The method of claim 1,
Receiving a brightness adjustment command; And
Adjusting the duty of the dimming signal to adjust the luminance to a size corresponding to the luminance adjustment command within a maximum luminance value range of the image frame of each content;
Display device further comprises. An image processor which performs image processing on a plurality of different contents; And
Analyzing the luminance characteristics of the image frames of each of the plurality of contents, generating a dimming signal corresponding to the luminance characteristics analyzed for each of the image frames, and dimming corresponding to each image frame in synchronization with the display timing of the image frame. A display processor for providing a signal to the backlight unit;
And a signal processing unit. The method of claim 10,
Wherein the image processing unit comprises:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
The display processing unit,
A dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame by calculating a luminance characteristic of the image frame of each content by applying an image analysis window having a predetermined size to the combined image frame. Signal processing apparatus characterized in that for generating. The method of claim 10,
Wherein the image processing unit comprises:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
The display processing unit,
Separating the image frame of each content from the combined image frame, calculates the luminance characteristic of each of the separated image frame, and generates a dimming signal having a duty corresponding to the luminance characteristic calculated for each image frame Signal processing apparatus characterized in that. In the signal processing method for providing a backlight in the signal processing device,
Performing image processing on a plurality of different contents;
Analyzing a luminance characteristic of an image frame of each of the plurality of contents and generating a dimming signal corresponding to the luminance characteristic analyzed for each image frame; And
Providing a dimming signal corresponding to each image frame to a backlight unit in synchronization with the display timing of the image frame;
/ RTI > The method of claim 13,
The step of performing the image processing includes:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
Generating the dimming signal,
Calculating brightness characteristics of the image frames of the respective contents by applying an image analysis window having a predetermined size to the combined image frames; And
Generating a dimming signal having a duty corresponding to the luminance characteristic calculated for each of the image frames;
≪ / RTI > The method of claim 13,
The step of performing the image processing includes:
Generating an image frame of each of the plurality of contents, combining the generated image frames,
Generating the dimming signal,
Separating image frames of the respective content from the combined image frame, and calculating luminance characteristics of the separated image frames; And
Generating a dimming signal having a duty corresponding to the luminance characteristic calculated for each of the image frames;
Display device comprising a.
KR1020120010058A 2012-01-31 2012-01-31 Dispaly apparatus and signal processing device and method for providing backlight KR20130088673A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106033666A (en) * 2015-03-18 2016-10-19 联想(北京)有限公司 Information processing method and electronic equipment
WO2018080000A1 (en) * 2016-10-31 2018-05-03 삼성전자 주식회사 Display apparatus and method
CN114242002A (en) * 2021-11-18 2022-03-25 岚图汽车科技有限公司 Backlight brightness adjusting system and method for automobile central panel
WO2022124571A1 (en) * 2020-12-10 2022-06-16 삼성전자주식회사 Electronic apparatus and control method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106033666A (en) * 2015-03-18 2016-10-19 联想(北京)有限公司 Information processing method and electronic equipment
CN106033666B (en) * 2015-03-18 2019-02-05 联想(北京)有限公司 A kind of information processing method and electronic equipment
WO2018080000A1 (en) * 2016-10-31 2018-05-03 삼성전자 주식회사 Display apparatus and method
WO2022124571A1 (en) * 2020-12-10 2022-06-16 삼성전자주식회사 Electronic apparatus and control method thereof
CN114242002A (en) * 2021-11-18 2022-03-25 岚图汽车科技有限公司 Backlight brightness adjusting system and method for automobile central panel

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