KR20130101324A - Apparatus and method for processing data, image display device using the same and method for driving thereof - Google Patents

Abstract

PURPOSE: A data processing device, a method thereof, an image display device using the same, and a driving method thereof reduce power consumption by differentiating the brightness of an interested region and an uninterested region through the analysis of an input image. CONSTITUTION: An area-specific gain value generation unit (110) extracts an interested region where a certain part of one screen is highlighted and an uninterested region except for the interested region and differentiates and generates a gain value of the interested region and a gain value of the uninterested region based on each input data of the interested region and the uninterested region. A data correction unit (120) generates corrected data per frame by correcting the input data of the interested region according to the gain value of the interested region and the input data of the uninterested region according to the gain value of the uninterested region. A data transmission unit (130) outputs the corrected data. [Reference numerals] (110) Area-specific gain value generation unit; (120) Data correction unit; (130) Data transmission unit; (AA) Data operation unit

Description

Data processing apparatus and method, image display device using same and driving method thereof {APPARATUS AND METHOD FOR PROCESSING DATA, IMAGE DISPLAY DEVICE USING THE SAME AND METHOD FOR DRIVING THEREOF}

The present invention relates to an image display apparatus, and more particularly, to a data processing apparatus and method capable of reducing power consumption, an image display apparatus using the same, and a driving method thereof.

Currently, image display devices such as laptops, monitors, mobile devices (eg, mobile phones, smart phones, notebook computers, tablet personal computers), and televisions include liquid crystal display devices and organic light emitting diodes. Display devices (Organic Light Emitting Display Device) are widely commercialized.

The liquid crystal display displays an image through light transmission of the liquid crystal. Since the liquid crystal does not have self-luminous property, a separate light source such as a backlight is used.

The organic light emitting diode display displays an image through light emission of the light emitting diode. Since the organic light emitting diode displays self-emission characteristics of the light emitting diode, the organic light emitting diode display does not require a separate light source.

Recently, in the display industry, various technologies for lowering power consumption of display devices have been proposed in accordance with the trend of environmental technology. For example, in the case of a liquid crystal display, power consumption is reduced by using a local dimming method, and in the case of an organic light emitting display, power consumption is reduced by using a peak luminance control method. .

The local dimming driving method, as in the "liquid crystal display device and its local dimming method" disclosed in Korean Patent Application Laid-Open No. 10-2011-0057540, analyzes an input image and adjusts backlight dimming data to adjust the luminance of the backlight unit. In addition to reducing the power consumption by compensating the brightness of the backlight unit is reduced through the data compensation.

And, the peak luminance control method, as in the "consumption power control device, image processing device, self-luminous display device, electronic devices, power consumption control method and computer program" disclosed in Korean Patent Laid-Open No. 10-2009-0033413 The power consumption is reduced by controlling the peak luminance of the self-luminous display device based on the power consumption value of the self-luminous display device based on the image signal.

However, since each of the aforementioned display devices reduces power consumption based only on an input image, image quality may deteriorate, and there is a limit to reducing power consumption.

Disclosure of Invention The present invention has been made to solve the above-described problem, and a data processing apparatus and method for reducing power consumption by differentially dividing brightness of a region of interest and an uninterested region through analysis of an input image, an image display apparatus using the same, and It is a technical problem to provide a driving method thereof.

According to an aspect of the present invention, a data processing apparatus according to the present invention analyzes input data of an input image, extracts an ROI where a certain portion is highlighted and an uninterested region excluding the ROI, and extracts the ROI. An area-specific gain value generation unit for generating the gain value of the region of interest and the gain value of the region of uninterested region based on input data of each of the uninterested region; A data corrector configured to correct input data of the region of interest according to the gain value of the region of interest, correct input data of the region of uninterested region according to the gain value of the region of interest, and generate correction data in a frame unit; And a data transmission unit for outputting the correction data.

According to an aspect of the present invention, there is provided an image display device including: a display panel having a plurality of pixels formed for each pixel area defined by an intersection of a plurality of gate lines and a plurality of data lines; A timing controller including a data processor configured to correct input data of an input image and generate correction data; And a panel driver configured to drive each pixel according to the correction data supplied from the data processor by controlling the timing controller, wherein the data processor analyzes the input data of the input image and emphasizes a certain portion on one screen. Extracting the uninterested region except for the ROI and the ROI, and differentially generating a gain value of the ROI and a gain value of the uninterested region based on input data of each ROI and the uninterested region An area gain value generation unit; A data corrector configured to correct input data of the region of interest according to the gain value of the region of interest, correct input data of the region of uninterested region according to the gain value of the region of interest, and generate correction data in a frame unit; And a data transmission unit for outputting the correction data.

The data processing method according to the present invention for achieving the above-described technical problem is to analyze the input data of the input image to extract the region of interest and the non-interested region except for the region of interest highlighted on a screen, the region of interest And generating (A) the difference between the gain value of the ROI and the gain value of the ROI based on the input data of each of the uninterested regions; (B) correcting input data of the ROI according to the gain value of the ROI, and correcting input data of the ROI according to the gain value of the ROI, thereby generating frame correction data; And outputting the correction data (C).

According to an aspect of the present invention, there is provided a method of driving an image display apparatus including an image display panel including a display panel having a plurality of pixels formed for each pixel region defined by an intersection of a plurality of gate lines and a plurality of data lines. A method of driving an apparatus, comprising: generating correction data using the data processing method; And driving each pixel based on the correction data.

Each of the plurality of pixels is formed in the pixel area and outputs a data current corresponding to the correction data; And a light emitting cell emitting light by a data current supplied from the cell driving circuit, and driving each pixel based on the correction data comprises supplying the correction data to the cell driving circuit to supply the correction data. The light emitting cell may emit light according to a corresponding data current.

Each of the plurality of pixels includes a liquid crystal cell formed in the pixel area to adjust a transmittance of light irradiated from the backlight unit to the display panel, and the driving of each pixel based on the correction data may include the correction. The liquid crystal cell is driven according to a data voltage corresponding to data.

The driving method of the image display apparatus may include dividing the display panel into a plurality of blocks, and calculating backlight dimming data for each block based on correction data of each block; And individually driving light sources of the backlight unit arranged to individually irradiate light to each block of the display panel according to the backlight dimming data for each block.

According to the above solution, the data processing apparatus and method, an image display apparatus using the same, and a driving method thereof according to the present invention extract a region of interest and an uninterested region from an input image and adjust brightness of the region of interest and an uninterested region. Differentiation can reduce power consumption. In particular, the present invention minimizes image quality deterioration of an image displayed on a flat panel display device by reducing the brightness of the uninterested region by an allowance for decreasing the brightness of the uninterested region generated according to the input data of the uninterested region. The power consumption can be further reduced.

1 is a block diagram schematically illustrating a data processing apparatus according to a first embodiment of the present invention.
2 is a diagram for describing a region of interest and an uninterested region of an input image.
FIG. 3 is a block diagram schematically illustrating a gain value generator for each region illustrated in FIG. 1.
FIG. 4 is a block diagram schematically illustrating an area extractor illustrated in FIG. 3.
FIG. 5 is a block diagram schematically illustrating a second gain value generator shown in FIG. 3.
6A to 6E are graphs for explaining an example of a first brightness reduction allowance calculation function for calculating the first brightness reduction allowance in the first brightness reduction allowance calculator shown in FIG. 5.
7A to 7E are graphs for describing an example of a second brightness reduction allowance calculation function for calculating the second brightness reduction allowance in the second brightness reduction allowance calculator shown in FIG. 5.
8 is a flowchart illustrating a data processing method using a data processing apparatus according to a first embodiment of the present invention.
FIG. 9 is a flowchart illustrating a process of setting gain values of an ROI and an uninterested region shown in FIG. 8.
10 is a block diagram schematically illustrating a data processing apparatus according to a second embodiment of the present invention.
11 is a diagram schematically illustrating an image display apparatus according to a first embodiment of the present invention.
12 is a block diagram schematically illustrating the timing controller shown in FIG. 11.
FIG. 13 is an experimental image for explaining an effect of reducing power consumption of a dark image in the image display device according to the first embodiment of the present invention.
14 is an experimental image for explaining an effect of reducing power consumption of a bright image in the image display device according to the first embodiment of the present invention.
15 is a diagram schematically illustrating an image display device according to a second embodiment of the present invention.
FIG. 16 is a block diagram schematically illustrating the timing controller illustrated in FIG. 15.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram schematically illustrating a data processing apparatus according to a first embodiment of the present invention, and FIG. 2 is a view for explaining a region of interest and an uninterested region of an input image.

1 and 2, the data processing apparatus 100 according to the first exemplary embodiment of the present disclosure analyzes frame input data Fdata of an input image Iimage to analyze an ROI and an NROI of interest. Frame input data according to gain values G1 and G2 of the region-specific gain value generator 110, the ROI, and the NROI, which generate respective gain values G1 and G2. A data correction unit 120 for correcting Fdata to generate correction data Fdata ', and aligning the correction data Fdata' to the aligned alignment data RGB as a data driver (not shown) of the image display device. It is configured to include a data transmission unit 130 for outputting.

The gain value generator 110 for each region analyzes the frame input data Fdata of the input image Iimage, and as shown in FIG. 2, the ROI and the ROI where a certain portion is highlighted on one screen. Extracts the uninterested region NROI except for the ROI, and extracts the region of interest location information A1 for the extracted ROI and the uninterested region position information A2 for the extracted uninterested region NROI. In addition, the gain value G1 of the ROI and the gain value G2 of the uninterested region are generated based on the input data of each of the ROI and the NROI.

The gain value generator 110 for each region generates a gain value G1 of the ROI for maintaining the brightness of the ROI at the brightness corresponding to the input data of the ROI. For example, the gain value G1 of the ROI may be set to a reference gain value, for example, a value of 1.

The region-specific gain value generator 110 compares a preset image reference brightness level with an image brightness level calculated from frame-based input data Fdata, and input data of an uninterested region NROI to correspond to a comparison result. Analyze to generate a gain value (G1) of the uninterested region (NROI) for reducing the brightness of the uninterested region (NROI). For example, the gain value G2 of the uninterested region NROI may be set to a value of 0 to less than 1 according to the input data of the uninterested region NROI.

In detail, the gain value generator 110 for each region analyzes the input data Fdata of the input image Iimage on a frame-by-frame basis to calculate an average brightness level of the frame image data as an image brightness level, and the image brightness level. Analyzes the input data of the NROI so as to correspond to the comparison result between the image reference brightness level and the image reference brightness level, and generates a gain value G2 of the NROI for reducing the brightness of the NROI. do. That is, when the image reference brightness level is equal to or higher than the image brightness level, the gain value generator 110 for each region calculates an average luminance level of the uninterested region NROI for input data of the uninterested region NROI. Reduces the brightness of the NROI based on the brightness level of the NROI, which is calculated according to the brightness level of the non-interested area based on the viewer's (or user's) cognitive characteristics. A gain value G2 of the uninterested region NROI is reduced to decrease by the amount of decrease in brightness. On the other hand, when the image reference brightness level is lower than the image brightness level, the region-specific gain value generator 110 may determine the ratio based on the image complexity of the NROI with respect to the input data of the NROI. The NROI is to reduce the brightness of the NROI, but to reduce the brightness of the NROI by an allowance for decreasing the NROI calculated according to the image complexity of the NUT based on the cognitive characteristics of the viewer (or user). To generate the gain value (G2).

The data corrector 120 may include input data of the ROI included in the ROI information A1 using gain values G1 and G2 of the ROI and the NROI, respectively. Each of the input data of the uninterested region NROI included in the uninterested region information A2 is corrected to generate correction data Fdata 'in units of frames.

The data transmission unit 130 aligns the correction data Fdata 'supplied from the data correction unit 120 to be suitable for driving (eg, resolution) of the image display device (not shown), and sorts the aligned data. The data RGB is output to a data driver (not shown) of the image display device. In this case, the data transmitter 130 may output the alignment data RGB to the data driver according to a predetermined data interface scheme.

As such, the data processing apparatus 100 according to the first exemplary embodiment of the present invention extracts the ROI and the uninterested region NROI from the input image Iimage, and extracts the ROI and the uninterested region. The power consumption can be reduced by differentiating the brightness of the (NROI). In particular, the data processing apparatus 100 may adjust the brightness of the non-interested region NROI by an amount of allowance for decreasing the brightness of the uninterested region generated based on the input data of the uninterested region NROI based on the cognitive characteristic of the viewer (or user). By reducing the power consumption, the image quality of the input image Iimage can be minimized and power consumption can be further reduced.

FIG. 3 is a block diagram schematically showing a gain value generating unit for each region shown in FIG. 1, FIG. 4 is a block diagram schematically showing an area extracting unit shown in FIG. 3, and FIG. 5 is a second gain shown in FIG. 3. A block diagram schematically showing a value generator.

3 to 5, the gain value generator 110 for each region includes an area extractor 112, an image brightness calculator 114, and first and second gain value generators 116 and 118. It is configured by.

As illustrated in FIG. 2, the area extractor 112 analyzes frame input data Fdata of the input image Iimage to determine a region of interest ROI and a region of interest ROI in which a certain portion is highlighted on one screen. The region of interest NROI, which is excluded, is extracted, and the region of interest location information A1 and the region of uninterested region information A2 are generated based on the extracted positions of the ROI and the NROI, respectively. . In this case, the input image Iimage may include a focus area where a focus is adjusted to emphasize a certain portion, and a non-focus area blurry by out focus. In this case, since the viewer (or the user) mainly views the focus area of the input image, the focus area may be defined as the ROI, and the nonfocus area may be defined as the NROI.

As illustrated in FIG. 4, the area extractor 112 may include a focus area extractor 112a, a focus area blocker 112b, and an area information extractor 112c.

As shown in FIG. 2, the focus region extractor 112a extracts a focus region of the input image Iimage based on the input data Fdata of the input image Iimage, and includes the extracted focus region. The first processed image is generated and provided to the focal region blocker 112b. For example, the focus area extractor 112a divides the input image Iimage into a plurality of blocks composed of a plurality of pixels, and calculates an average value for each block based on input data values of each pixel included in each block. The first processed image including the focal region may be generated by subtracting the input data value of each pixel from the calculated average value for each block.

The focus region blocker 112b blocks the focus region from the first processed image provided from the focus region extractor 112a, generates a second processed image in which the focus region is blocked, and provides the generated region image to the region information extractor 112c. do. For example, the focus area blocker 112b calculates the maximum value of each block of the first processed image, extracts the maximum value for each block, and changes the data value of each block to the extracted maximum value for each block. Block and generate a second processed image including the blocked focal region.

The region information extracting unit 112c sets the region of focus blocked in the second processed image provided from the focus region blocking unit 112b as the region of interest ROI, and based on the set position of the region of interest ROI. The position information A1 is generated and provided to the first gain value generator 116. In addition, the area information extracting unit 112c sets the non-focus area NROI except the focus area in the second processed image provided from the focus area blocking unit 112b and sets the set uninterested area ( Based on the position of the NROI, the uninterested region position information A2 is generated and provided to the second gain value generator 118.

3 again, the image brightness calculator 114 analyzes the frame input data Fdata of the input image Iimage to calculate an image brightness level IBL for the input image Iimage to generate a second gain value generator ( 118). For example, the image brightness calculator 114 may calculate an average data value of the input data Fdata in units of frames, and calculate an average brightness level corresponding to the average data value as the image brightness level IBL.

The first gain value generator 116 generates the gain value G1 of the ROI as described above based on the ROI position information A1 provided from the region extractor 112 and generates the gain value G1 of the ROI. The gain value G1 of the ROI is provided to the data correction unit 120 described above. That is, the first gain value generator 116 generates a gain value G1 of the ROI based on the ROI position information A1, but adjusts the brightness of the ROI to the ROI. A gain value G1 of the ROI is maintained to maintain the brightness corresponding to the input data. In this case, the gain value G1 of the ROI may be set to a reference gain value, for example, a value of 1.

Meanwhile, the first gain value generator 116 adjusts the brightness of the ROI based on input data of the ROI corresponding to the ROI information A1 provided from the region extractor 112. A gain value G1 of the region of interest ROI for increasing may be generated. In this case, the first gain value generator 116 calculates the brightness level of the ROI from the input data of the ROI, and sets the reference brightness level of the ROI preset and the calculated ROI. By comparing the brightness levels of the ROIs, the gain value G1 of the ROI may be set as a reference value or higher than the reference value according to the comparison result.

For example, when the brightness level of the ROI is less than the reference brightness level of the ROI, the first gain value generator 116 may reference the gain value G1 of the ROI as a reference value. Can be set. On the contrary, when the brightness level of the ROI is equal to or higher than the reference brightness level of the ROI, the first gain value generator 116 may reference the gain value G1 of the ROI. Can be set to a higher value. In this case, the gain value G1 of the ROI may have one or more values according to the brightness level of the ROI.

The second gain value generator 118 generates the gain value G2 of the uninterested region NROI as described above based on the uninterested region position information A2 provided from the region extractor 112. To this end, as shown in FIG. 5, the second gain value generation unit 118 includes a brightness determination unit 118a, a first brightness reduction allowance calculator 118b, and a second brightness reduction allowance calculator 118c. And a second gain value setting section 118d.

The brightness determiner 118a determines the brightness of the input image based on the image brightness level IBL supplied from the image brightness calculator 114, and the uninterested region supplied from the area extractor 112 according to the determination result. The positional information A2 is supplied to the first brightness reduction allowance calculator 118b or the second brightness reduction tolerance calculator 118c. That is, the brightness determining unit 118a determines that the input image is a dark image when the preset image reference brightness level is equal to or higher than the image brightness level IBL supplied from the image brightness calculating unit 114. The information A2 is supplied to the first brightness reduction allowance calculator 118b. On the other hand, when the image reference brightness level is lower than the image brightness level IBL, the brightness determining unit 118a determines the input image as a bright image and calculates the uninterested region location information A2 as the second brightness reduction allowable amount. It supplies to the part 118c.

As such, the brightness determining unit 118a divides the input image into a dark image and a bright image according to the image brightness level IBL of the input image, and differentiates the brightness of the NROI of each of the dark image and the bright image. As described above, the uninterested region position information A2 is supplied to the first brightness reduction allowance calculator 118b or the second brightness reduction allowance calculator 118c as described above.

When the uninterested region position information A2 is supplied from the brightness determiner 118a, the first brightness reduction allowance calculating unit 118b receives the uninterested region position information A2 from the input data Fdata in units of frames. The second gain is obtained by extracting the input data A2_data of the uninterested region NROI corresponding to and calculating the first brightness reduction allowable amount LDV1 based on the extracted input data A2_data of the uninterested region NROI. It supplies to the value setting part 118d. That is, when the input image is a dark image, the perception characteristic of the viewer (or user or person) with respect to the NROI of the input image is lowered as the brightness of the image is higher, so the first brightness reduction allowance calculator 118b Calculates the first brightness reduction allowance LDV1 for reducing the power consumption relatively much by increasing the brightness reduction allowance of the uninterested region NROI. Specifically, the first brightness reduction allowance calculator 118b analyzes the input data A2_data of the uninterested region NROI to calculate the brightness level of the uninterested region NROI, and calculates the calculated uninterested region NROI. The first brightness reduction allowable amount LDV1 for limiting the brightness reduction allowance of the uninterested region NROI is calculated and supplied to the second gain value setting unit 118d based on the brightness level of the NORI. In this case, the brightness level of the uninterested region NROI may be an average luminance level of the input data A2_data of the uninterested region NROI.

The first brightness reduction allowance calculator 118b is configured based on a first brightness reduction tolerance calculation function having a slope in which the first brightness reduction allowance LDV1 increases as the brightness level x of the uninterested region is increased. The brightness reduction allowance LDV1 can be calculated. At this time, the first brightness reduction allowance calculation function, as shown in Figs. 6A to 6E, is a linear function of y = ax + b (Fig. 6A) and a second order of y = -ax ² + bx + c. Function (FIG. 6B), power function consisting of y = ax ^b (FIG. 6C), exponential function consisting of y = ae ^bx (FIG. 6D), and logarithm function consisting of y = aLn (x) + b (FIG. 6E). It may be any one of. Here, in the first brightness reduction allowance calculation function y, the constants a, b, and c each represent a viewer (or user) for the uninterested region NROI of the input image based on the brightness level of the uninterested region NROI. , Cognitive characteristics of humans) can be set through experiments. Accordingly, the first brightness reduction allowance calculator 118b substitutes the x value, which is the brightness level of the uninterested region NROI, into the variable x of the first brightness reduction tolerance calculation function y, thereby allowing the first brightness reduction tolerance. (LDV1) is calculated.

Meanwhile, the first brightness reduction allowable amount LDV1 according to the brightness level of the uninterested region NROI may be data-formed through the preliminary experiment and mapped and stored in the lookup table. In this case, the first brightness reduction allowance calculator 118b analyzes the input data A2_data of the uninterested region NROI to calculate the brightness level of the uninterested region NROI, and is mapped to a lookup table. The first brightness reduction allowance LDV1 corresponding to the brightness level of the uninterested region NROI calculated among the first brightness reduction allowances LDV1 is read and supplied to the second gain value setting unit 118d.

Referring back to FIG. 5, when the uninterested region position information A2 is supplied from the brightness determiner 118a, the second brightness reduction allowance calculator 118c determines the uninterested region position in the input data Fdata in units of frames. The input data A2_data of the uninterested region NROI corresponding to the information A2 is extracted, and the second brightness reduction allowable amount LDV2 is calculated based on the extracted input data A2_data of the uninterested region NROI. To the second gain value setting section 118d. That is, when the input image is a bright image, the viewer (or user or person) perception characteristic of the NROI of the input image increases as the image complexity of the image increases, so that the second brightness reduction allowance calculator 118c ) Reduces the brightness reduction allowance of the uninterested region (NROI) to reduce the power consumption relatively little and calculates the second brightness reduction allowance LDV2 for minimizing image degradation. Specifically, the second brightness reduction allowance calculator 118c analyzes the input data A2_data of the uninterested region NROI, calculates an image complexity of the uninterested region NROI, and calculates the calculated uninterested region NROI. The second brightness reduction allowance LDV2 for limiting the brightness reduction allowance of the uninterested region NROI is calculated and supplied to the second gain value setting unit 118d based on the image complexity. In this case, the image complexity of the NROI may be calculated based on an image edge component of the NROI.

The second brightness reduction allowance calculator 118c may generate a second brightness based on a second brightness reduction allowance calculation function having a slope in which the brightness reduction allowance of the uninterested region increases as the image complexity x of the uninterested region increases. The reduction allowance LDV2 can be calculated. In this case, as shown in FIGS. 7A to 7E, the second brightness reduction allowance calculation function is a linear function of y = -ax + b (FIG. 7A) and ² consisting of y = -ax ² + bx + c. A difference function (Fig. 7B), a power function consisting of y = ax ^-b (Fig. 7C), an exponential function consisting of y = ae ^{- bx} (Fig. 7D), and a logarithm function consisting of y = -aLn (x) + b (FIG. 7E). Here, in the second brightness reduction allowance calculation function y, the constants a, b, and c each represent a viewer (or user) for the uninterested region NROI of the input image based on the image complexity of the uninterested region NROI. , Cognitive characteristics of humans) can be set through experiments. Accordingly, the second brightness reduction allowance calculating unit 118c substitutes the value x of the image complexity of the NROI into the variable x of the second brightness reduction allowance calculation function y and substitutes the second brightness reduction allowance. (LDV2) is calculated.

On the other hand, the second brightness reduction allowable amount LDV2 according to the brightness level of the uninterested region NROI may be data-formed through the preliminary experiment and mapped and stored in the lookup table. In this case, the second brightness reduction allowance calculator 118c analyzes the input data A2_data of the uninterested region NROI to calculate an image complexity of the uninterested region NROI, and is mapped to a lookup table. The second brightness reduction allowance LDV2 corresponding to the image complexity of the uninterested region NROI calculated from the two brightness reduction allowances LDV2 is read and supplied to the second gain value setting unit 118d.

Again, in FIG. 5, the second gain value setting unit 118d is configured to reduce the brightness of the uninterested region NROI by the first brightness reduction allowance LDV1 supplied from the first brightness reduction allowance calculator 118b. Computing the second gain value G2 of the region of interest NROI or reducing the brightness of the uninterested region NROI by the second brightness reduction allowance LDV2 supplied from the second brightness reduction allowance calculator 118c. The second gain value G2 of the uninterested region NROI is set, and the second gain value G2 of the set uninterested region NROI is provided to the data correction unit. In this case, the second gain value G2 of the uninterested region NROI may be set to a value of 0 to less than 1.

8 is a flowchart illustrating a data processing method using a data processing apparatus according to a first embodiment of the present invention.

Referring to FIG. 8, a data processing method using a data processing apparatus according to the first embodiment of the present invention will be described below.

First, inputting frame input data of an input image and analyzing the input data to extract the region of interest and the non-interested region except for the region of interest highlighted on a screen, each of the extracted region of interest and the uninterested region The gain value is differentially generated (S100 and S200). The generation of the gain value of the ROI and the gain value of the uninterested region are performed by the region-specific gain value generator illustrated in FIG. 1.

The gain value of the ROI is set to maintain the brightness of the ROI at a brightness corresponding to the input data of the ROI or to increase the brightness of the ROI corresponding to the input data of the ROI. The gain value of the uninterested region is set such that the brightness of the uninterested region decreases according to the input data of the uninterested region.

Then, based on the gain value of the region of interest and the gain value of the uninterested region, correction data is generated by correcting each of input data of the region of interest and input data of the uninterested region (S300). Generation of the correction data is performed by the data correction unit shown in FIG.

Then, the correction data is aligned and output to the data driver (S400). The data output is performed by the data transmission unit shown in FIG.

FIG. 9 is a flowchart illustrating a process of setting gain values of an ROI and an uninterested region shown in FIG. 8.

Referring to FIG. 9, a process of setting the gain value of the ROI and the gain value of the uninterested region is described as follows.

First, the frame input data of the input image is analyzed to extract an ROI and an uninterested region, and an image brightness level of the input image is calculated (S210). The process of extracting the ROI and the uninterested region is performed by the region extractor of the gain value generator for each region illustrated in FIGS. 3 and 4, and the process of calculating the image brightness level is performed for each region illustrated in FIG. 3. The image brightness calculating unit of the gain value generating unit is performed.

Then, a reference gain value is generated as a gain value of the ROI, or the brightness of the ROI increases based on the input data of the ROI so that the brightness of the ROI is maintained at the brightness corresponding to the input data of the ROI. The gain value of the ROI is generated to be possible (S220). The gain value of the ROI is performed by the first gain value generator shown in FIG. 3.

In addition, the gain value of the uninterested region is generated based on the image brightness level and the input data of the uninterested region (S230). The gain value of the uninterested region is performed by the second gain value generator shown in FIGS. 3 and 5 described above. The process of generating the gain value of the uninterested region will be described in detail as follows.

First, it is determined whether the input image is a dark image or a bright image by comparing the image brightness level IBL and a preset image reference brightness level IBref (S230-1). In this case, the image reference brightness level IBref may be set to 45% of a specific luminance level of data of one frame. The image determination process is performed by the brightness determination unit shown in FIG. 5 described above.

In step S230-1, when the image reference brightness level IBref is equal to or higher than the image brightness level IBL, the input image is determined to be a dark image, and the image reference brightness level IBref is the image brightness. If it is lower than the level IBL, the input image is determined to be a bright image.

If the image reference brightness level IBref is equal to or higher than the image brightness level IBL in step S230-1 (“Yes” in S230-1), it is uninterested based on input data of an uninterested region. The brightness level of the region is calculated, and the first brightness reduction allowance for limiting the brightness reduction allowance of the uninterested region is calculated based on the brightness level of the uninterested region (S230-2 and S230-3). The process of calculating the brightness level of the uninterested region and the process of calculating the first brightness reduction allowance are performed by the first brightness reduction allowance calculator shown in FIG. 5.

In contrast, when the image reference brightness level IBref is lower than the image brightness level IBL in step S230-1 (“No” in S230-1), the image reference brightness level IBref of the uninterested region is determined based on the input data of the uninterested region. The image complexity is calculated, and a second brightness reduction allowance for limiting the brightness reduction allowance in the uninterested region is calculated based on the image complexity of the uninterested region (S230-4, S230-5). The process of calculating the image complexity of the uninterested region and the calculating of the second brightness reduction allowance are performed by the second brightness reduction allowance calculator shown in FIG. 5.

Then, a gain value of the uninterested region for reducing the brightness of the uninterested region by the first brightness reduction allowable amount or reducing the brightness of the uninterested region by the second brightness reduction allowable amount is generated (S230-6). The process of generating the gain value of the uninterested region is performed by the second gain value setting unit illustrated in FIG. 5.

The data processing device and the data processing method using the same according to the first embodiment of the present invention are applied to a flat panel display such as a liquid crystal display, an organic light emitting display, or a plasma display panel, and thus consume power of the flat panel display. It is possible to minimize the deterioration of image quality due to the reduction of power consumption.

10 is a block diagram schematically illustrating a data processing apparatus according to a second embodiment of the present invention.

Referring to FIG. 10, the data processing apparatus 200 according to the second exemplary embodiment of the present invention may include an area-specific gain value generator 110, a data corrector 120, a data transmitter 130, and a local dimming unit. And 140. Since the data processing apparatus 200 according to the second exemplary embodiment of the present invention is the same as the data processing apparatus 100 illustrated in FIGS. 1 to 5 except that the data processing apparatus 200 further includes a local dimming unit 140. Duplicate descriptions of the same components will be omitted. The data processing apparatus 200 according to the second exemplary embodiment of the present invention is applied to a liquid crystal display, and extracts a region of interest and an uninterested region of interest from an input image to be displayed on a liquid crystal display panel (not shown). And a block for driving the backlight unit for localizing the backlight unit that irradiates light on the liquid crystal display panel based on the correction data Fdata 'by correcting the input data Fdata by differentiating gain values of the regions of interest and uninterested regions. The star backlight dimming data Bdim is calculated.

The local dimming unit 140 divides the correction data Fdata 'of the input image supplied from the data correcting unit 120 into a plurality of blocks, and blocks the backlight dimming data Bdim for each block based on the correction data of each block. Calculate In detail, the local dimming unit 140 divides the liquid crystal display panel into imaginary blocks arranged in a lattice form, and blocks dimming data Bdim for each block based on block correction data to be supplied to each of the blocks. Calculate In this case, the backlight dimming data Bdim for each block may be calculated to correspond to the maximum value, average value, or average luminance level of the correction data for each block.

Meanwhile, the local dimming unit 140 is Korean Patent Application No. 10-2009-0113985, Korean Patent Application No. 10-2009-0116808, or Korean Patent Application No. 10-2009-0117734 filed by the present applicant. It can be implemented by the local dimming device disclosed in each.

Such a data processing method using the data processing apparatus according to the second embodiment of the present invention is the same as the data processing method using the data processing apparatus according to the first embodiment of the present invention illustrated in FIGS. 8 and 9. As described above, the method may further include calculating the backlight dimming data Bdim for each block based on the correction data Fdata ′ of the input image.

As described above, the data processing device and the data processing method according to the second embodiment of the present invention may be applied to a liquid crystal display device to reduce power consumption of the liquid crystal display device and to minimize image quality deterioration due to reduction of power consumption. have.

FIG. 11 is a diagram schematically illustrating an image display device according to a first embodiment of the present invention, and FIG. 12 is a block diagram schematically illustrating the timing controller shown in FIG. 11.

11 and 12, the image display device 300 according to the first embodiment of the present invention includes a display panel 310, a timing controller 320, and a panel driver 330.

The display panel 310 includes a plurality of pixels formed for each pixel area defined by the plurality of data lines DL and the plurality of gate lines GL.

The plurality of data lines DL are formed to have a predetermined interval along the short side direction of the display panel 310, and the plurality of gate lines GL intersect the plurality of data lines DL. It is formed to have a constant interval along the long side direction.

The plurality of pixels are repeatedly arranged in the order of red, green, and blue in each pixel area. Each pixel includes a cell driving circuit 312 and a light emitting cell 314.

The cell driving circuit 312 converts a data current corresponding to the data signal supplied to the data line DL and supplies the converted data current to the light emitting cell 314 in response to the gate signal supplied to the gate line GL. To this end, the cell driving circuit 312 includes a switching transistor ST, a driving transistor DT, and a capacitor C.

The switching transistor ST is switched according to the gate signal supplied to the gate line GL to supply the data signal supplied to the data line DL to the driving transistor DT.

The driving transistor DT is switched according to the data signal supplied from the switching transistor ST to control the data current flowing from the first driving power line PL1 to the light emitting cell 314.

The capacitor C stores a voltage corresponding to the data signal supplied to the gate terminal of the driving transistor DT, and maintains the turn-on state of the driving transistor DT constant for one frame with the stored voltage.

The cell driving circuit described above may further include at least one compensation transistor (not shown) and at least one compensation capacitor (not shown) for compensating the threshold voltage of the driving transistor DT. ) May further include an emitting transistor (not shown) for selectively supplying a current supplied to the light emitting cell 314.

The light emitting cell 314 emits light by the data current supplied from the driving transistor DT. The light emitting cell 314 is formed on the first electrode (or pixel electrode) connected to the driving transistor DT, the organic layer (not shown) formed on the first electrode, and the organic layer, and formed on the second driving power line PL2. It is comprised including the connected 2nd electrode (or cathode electrode). Here, the organic layer may include a hole injection layer / a hole transporting layer / a light emitting layer / an electron transporting layer / an electron injection layer.

The light emitting layer according to the embodiment includes a red organic light emitting material, a green organic light emitting material, and a blue organic light emitting material according to each pixel. In this case, the emission layer according to the exemplary embodiment is formed on the lower substrate of the display panel 310.

The light emitting layer according to another embodiment may be made of a white organic light emitting material. In this case, the light emitting layer according to another exemplary embodiment is formed on the lower substrate of the display panel 310, and the display panel 310 further includes red, green, and blue color filters formed on the upper substrate to overlap each pixel. It is composed.

The timing controller 320 receives the image data Idata of the input image supplied from the driving system, and corrects by differentially correcting the brightness of the ROI and the uninterested region of the input image based on the received image data Idata. The data RGB is generated and supplied to the panel driver 330. In addition, the timing controller 320 receives the timing synchronization signal TSS supplied from an external driving system, and based on the data enable signal DE of the received timing synchronization signal TSS, The timing control signals GCS and DCS for controlling the driving timing are generated and supplied to the panel driver 330. To this end, the timing controller 320 includes a data receiver 322, a memory unit 324, a timing signal generator 326, and a data processor 328, as shown in FIG. 12.

The data receiving unit 322 receives and restores the image data Idata input from the driving system based on a predetermined interface method to generate the restoration data Rdata, and stores the generated restoration data Rdata in the memory unit 324. Store in In addition, the data receiver 322 receives the timing synchronization signal TSS input from the driving system and supplies the received timing synchronization signal TSS to the timing signal generator 326. In this case, the timing synchronization signal TSS may include a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE, and a reference clock DCLK, or may consist of only a data enable signal. have.

Meanwhile, the driving system converts image data according to a predetermined image into a low voltage differential signal (LVDS) interface method and transmits the image data to the data receiving unit 322 of the timing controller 320 and the image data. In addition, the data enable signal DE may be transmitted to the data receiver 322. In this case, the data receiver 322 receives and restores the image data and the data enable signal DE based on the LVDS interface method.

The timing signal generator 326 may include a gate timing control signal GCS and a data timing control signal for controlling driving timing of the panel driver 330 based on the data enable signal DE input from the data receiver 322. Each DCS is generated and provided to the panel driver 330.

The gate timing control signal GCS may include a gate start pulse for sequentially supplying gate signals to the plurality of gate lines GL, a plurality of gate clock signals, and the like. Can be.

The data timing control signal DCS includes a source start pulse and a source sampling clock for supplying a data voltage of one horizontal line to the plurality of data lines DL so as to be synchronized with a gate signal. , And Source Output Enable.

The data processor 328 generates the correction data RGB corrected by differentially correcting the brightness of the ROI and the uninterested region of the input image based on the input data Fdata input from the memory unit 324, thereby driving the panel driver 330. Supplies). The data processor 328 includes the data processor 100 according to the first embodiment of the present invention illustrated in FIGS. 1 to 5. Accordingly, the configuration of the data processor 328 and the description of the data processing method will be replaced with the description of FIGS. 1 to 9.

The data transmitter 130 (see FIG. 1) of the data processor 328 aligns the correction data Fdata 'according to the driving of the display panel 310, that is, the resolution or pixel driving method, and the aligned data RGB. ) Is transmitted to the panel driver 330 in units of one horizontal line.

Meanwhile, the data transmitter 130 (see FIG. 1) of the data processor 328 may convert the alignment data RGB into a data packet form and transmit the converted data RGB to the panel driver 330.

The panel driver 330 may include a gate driving circuit 332 for supplying a gate signal to the gate line GL of the display panel 310, and a data driver for supplying a data voltage to the data line DL of the display panel 310. The circuit part 334 is comprised.

The gate driving circuit unit 332 generates a gate signal in response to the gate timing control signal GCS supplied from the timing controller 320 and sequentially supplies the gate signal to the gate lines GL of the display panel 310. To this end, the gate driving circuit unit 332 may include a plurality of gate driving integrated circuits mounted on each of a plurality of gate circuit films (not shown), such as a tape carrier package (TCP) or a chip on flexible board or chip on film (COF). It may be configured to include. In this case, each of the plurality of gate circuit films (not shown) is attached to the gate pad portion of the display panel 310 by a tape automated bonding (TAB) process. The gate driving circuit unit 332 may be formed on one side non-display area of the lower substrate to be connected to the gate line together with the transistor manufacturing process of the display panel 310.

The data driving circuit unit 334 receives the data RGB and the data timing control signal DCS supplied from the timing controller 320 and converts the data RGB in analog form in response to the received data timing control signal DCS. The data voltage is converted into the data voltage and supplied to the data line DL. Accordingly, the cell driving circuit 312 of each pixel converts a data voltage into a data current according to a gate signal and supplies the same to the light emitting cell 314, and the light emitting cell 314 emits light by the data current to display the display panel ( An input image is displayed on the 310.

The data driving circuit unit 334 may include a plurality of data driving integrated circuits (not shown) mounted on each of a plurality of data circuit films (not shown) such as TCP or COF. In this case, each of the plurality of data circuit films (not shown) is attached to the data pad portion of the display panel 310 by a TAB process.

Meanwhile, when the data interface between the data driving circuit unit 334 and the timing controller 320 is in the form of a data packet, the data driving circuit unit 334 receives the data packet transmitted from the timing controller 320 and receives the received data packet. The display data is sampled at the C, converted into a data voltage, and supplied to the data line DL. As such, the data interface between the timing controller 320 and the timing controller 320 using the data packet is Korean Patent Application No. 10-2008-0127456 or Korean Patent Application No. 10-2008-0127458 filed by the present applicant. It may be implemented by the interface method disclosed in each call.

As such, the image display apparatus 300 according to the first exemplary embodiment of the present invention extracts an ROI and an uninterested region from an input image by using the data processor 328 of the timing controller 320, and extracts an ROI and an uninterested region. Differentiating the brightness of the region, but reducing the brightness of the uninterested region can minimize the deterioration of the image quality and further reduce the power consumption.

FIG. 13 is an experimental image for explaining an effect of reducing power consumption of a dark image in the image display device according to the first embodiment of the present invention.

FIG. 13A shows an input image having a dark brightness, and FIG. 13B shows that the brightness of the ROI and the uninterested region are differentially reduced by the data processing method of the present invention. Represents a corrected image whose brightness is reduced by the first brightness reduction allowable amount according to the brightness level of the uninterested region.

In the case of the input image, the brightness level of the uninterested region was calculated as 25%, and the first brightness reduction allowance according to the brightness level of the uninterested region was calculated as 18.8%. When the data of the uninterested region is corrected and displayed on the display panel according to the gain value of the uninterested region based on the first brightness reduction allowance, the power consumption of the image display apparatus 300 according to the first embodiment of the present invention is It is measured that 29.65% of the power consumption is reduced when the dark input image is displayed without correction.

14 is an experimental image for explaining an effect of reducing power consumption of a bright image in the image display device according to the first embodiment of the present invention.

FIG. 14A illustrates an input image having bright brightness, and FIG. 14B illustrates that the brightness of the ROI and the uninterested region are differentiated and reduced by the data processing method of the present invention. Represents a corrected image whose brightness is reduced by a second brightness reduction allowable amount according to the image complexity of the uninterested region.

In the case of the input image, the image complexity of the uninterested region was calculated as 24.7%, and the second brightness reduction allowance according to the image complexity of the uninterested region was calculated as 20.2%. When the data of the uninterested region is corrected and displayed on the display panel according to the gain value of the uninterested region based on the second brightness reduction allowance, the power consumption of the image display apparatus 300 according to the first embodiment of the present invention is It is measured that 22.82% of power consumption is reduced when displaying bright input image without correction.

FIG. 15 is a diagram schematically illustrating an image display device according to a second exemplary embodiment of the present invention, and FIG. 16 is a block diagram schematically illustrating the timing controller illustrated in FIG. 15.

15 and 16, the image display device 400 according to the second exemplary embodiment of the present invention may include a display panel 410, a backlight unit 415, a timing controller 420, a panel driver 430, And a backlight driver 440.

The display panel 410 includes a plurality of pixels P formed for each pixel area defined by the plurality of data lines DL and the plurality of gate lines GL.

The plurality of data lines DL are formed to have a predetermined interval along the short side direction of the display panel 410, and the plurality of gate lines GL intersect the plurality of data lines DL. It is formed to have a constant interval along the long side direction.

The plurality of pixels P are repeatedly arranged in order of red, green, and blue in each pixel area. Each pixel includes a thin film transistor T connected to a gate line GL and a data line DL, a liquid crystal capacitor C1 and a storage capacitor C2 formed between the thin film transistor T and the pixel electrode. do.

The liquid crystal capacitor C1 is a liquid crystal layer formed between the pixel electrode and the common electrode, and the liquid crystal array of the liquid crystal layer according to the data voltage applied from the panel driver 430 to the thin film transistor T and the common voltage applied to the common electrode. By changing the state, the transmittance of light emitted from the backlight unit 415 is adjusted.

The storage capacitor C2 is formed between the pixel electrode and the common electrode to charge the data voltage, and maintain the turn-on state of the thin film transistor T until the next data voltage is applied using the charged voltage. .

The backlight unit 415 divides the display panel 410 into virtual blocks arranged in a lattice form, and includes a plurality of light sources that irradiate light individually to each block. In this case, each of the plurality of light sources may be a light emitting diode array having a plurality of light emitting diodes disposed under the display panel 410 so as to face each of the blocks.

The timing controller 420 receives the image data Idata of the input image supplied from the driving system, and corrects by differentially correcting the brightness of the ROI and the uninterested region of the input image based on the received image data Idata. By generating the data RGB and supplying it to the panel driver 430, the backlight dimming data Bdim for each block for controlling the luminance of light irradiated to each block on a block basis is generated based on the correction data. The light driver 440 is supplied. In addition, the timing controller 420 receives the timing synchronization signal TSS supplied from an external driving system, and based on the data enable signal DE of the received timing synchronization signal TSS, the timing controller 420 of the panel driver 430. The timing control signals GCS and DCS for controlling the driving timing are generated and supplied to the panel driver 430.

As illustrated in FIG. 16, the timing controller 420 includes a data receiver 322, a memory 324, a timing signal generator 326, and a data processor 428. In the timing controller 420 having such a configuration, the remaining components except for the data processor 428 are the same as the timing controller 320 illustrated in FIG. 12, and thus, duplicate descriptions of the same components will be omitted. Reference numerals will be given.

The data processor 428 generates the correction data RGB corrected by differentially correcting the brightness of the ROI and the uninterested region of the input image based on the input data Fdata input from the memory unit 324 to drive the panel driver 330. ), And generates backlight dimming data Bdim for each block based on the correction data and supplies the same to the backlight driver 440. The data processor 428 includes a data processor 200 according to a second embodiment of the present invention illustrated in FIG. 11. Accordingly, the description of the configuration of the data processing unit 428 and the data processing method will be replaced with the description of FIGS. 1 to 11.

The panel driver 430 may include a gate driver circuit 432 for supplying a gate signal to the gate line GL of the display panel 410, and a data driver for supplying a data voltage to the data line DL of the display panel 410. The circuit unit 434 is configured.

The gate driving circuit unit 432 generates a gate signal in response to the gate timing control signal GCS supplied from the timing controller 420, and sequentially supplies the gate signal to the gate lines GL of the display panel 410. Since the gate driving circuit unit 432 is the same as the gate driving circuit unit 332 shown in FIG. 11 described above, redundant description thereof will be omitted.

The data driving circuit unit 434 receives the data RGB and the data timing control signal DCS supplied from the timing controller 420, and controls the data RGB in response to the received data timing control signal DCS. The data voltage is converted into an analog data voltage having a polarity corresponding to the signal and supplied to the data line DL. Since the data driving circuit unit 434 is the same as the data driving circuit unit 334 illustrated in FIG. 11 except for converting the data voltage into a positive or negative form according to the data polarity signal, a duplicate description thereof will be given. It will be omitted.

The backlight driver 440 drives the backlight unit 415 in units of blocks based on the block-based backlight dimming data Bdim supplied from the timing controller 420 to display the display panel 410 from the backlight unit 415. The luminance to be irradiated to each block of) is individually controlled. That is, the backlight driver 440 generates a pulse width modulation (PWM) signal having a duty ratio corresponding to the backlight dimming data Bdim for each block for each block and corresponds to the generated PWM signal. A backlight driving signal BDS for each block is generated to drive each light source of the backlight unit 415. Accordingly, the backlight unit 415 irradiates each block of the display panel 410 with light whose luminance is controlled in units of blocks by individually driving the plurality of light sources in units of blocks according to the blocks of backlight driving signals BDS. .

As such, the image display apparatus 400 according to the second exemplary embodiment of the present invention extracts an ROI and an uninterested region from an input image by using the data processor 428 of the timing controller 420, and extracts an ROI and an uninterested region. The brightness of the area is differentiated, but the brightness of the uninterested area is reduced to minimize the deterioration of the image quality and the power consumption can be further reduced. The local dimming of the backlight unit 415 allows the backlight unit 415 to be The power consumption can be further reduced.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

110: region gain unit 112: region extraction unit
114: image brightness calculator 116: first gain value generator
118: second gain value generation unit 120: data correction unit
130: data transmission unit 140: local dimming unit
310, 410: display panel 320, 420: timing controller
330 and 430 panel driver 415 backlight unit
440: backlight driving unit

Claims (21)

Analyze the input data of the input image to extract the ROI and the uninterested region except for the ROI where a certain portion is highlighted on one screen, and extract the ROI based on the input data of each of the ROI and the uninterested region. An area-specific gain value generation unit for generating a gain value and a gain value of an uninterested region by differentially generating the gain value;
A data corrector configured to correct input data of the region of interest according to the gain value of the region of interest, correct input data of the region of uninterested region according to the gain value of the region of interest, and generate correction data in a frame unit; And
And a data transmission unit for outputting the correction data. The method of claim 1,
And the gain value generation unit for each region generates a gain value of the ROI to maintain the brightness of the ROI at a brightness corresponding to the input data of the ROI. The method of claim 1,
The gain value generator for each region compares an image reference brightness level with an image brightness level calculated from input data in units of frames, and analyzes input data of the uninterested region according to a comparison result to reduce the brightness of the uninterested region. And generate a gain value of the uninterested region. The method of claim 3, wherein
The gain value generation unit for each region,
When the image reference brightness level is equal to or higher than the image brightness level, the brightness level of the uninterested region is calculated from the input data of the uninterested region to obtain a gain value of the uninterested region for reducing the brightness of the uninterested region. Create,
When the image reference brightness level is lower than the image brightness level, the image complexity of the uninterested region is calculated from the input data of the uninterested region to generate a gain value of the uninterested region for reducing the brightness of the uninterested region. A data processing device, characterized in that. 5. The method of claim 4,
The gain value generator for each region calculates a brightness reduction allowance of the uninterested region according to a brightness level of the uninterested region or an image complexity of the uninterested region, and reduces the brightness of the uninterested region by the brightness reduction allowance. And generate a gain value of the uninterested region. The method of claim 5, wherein
The brightness reduction allowance of the uninterested region increases as the brightness level of the uninterested region increases, or decreases as the image complexity of the uninterested region increases. A display panel having a plurality of pixels formed for each pixel region defined by intersections of the plurality of gate lines and the plurality of data lines;
A timing controller including a data processor configured to correct input data of an input image and generate correction data; And
A panel driver configured to drive each pixel according to the correction data supplied from the data processor by driving under the control of the timing controller,
The data display unit comprises the data processing device according to any one of claims 1 to 6. The method of claim 7, wherein
Wherein each of the plurality of pixels comprises:
A cell driving circuit formed in the pixel area and driven by driving of the panel driver to output a data current corresponding to the correction data; And
And a light emitting cell connected to the cell driving circuit and emitting light by a data current supplied from the cell driving circuit. The method of claim 7, wherein
A backlight unit radiating light onto the display panel; And
It further comprises a backlight driving unit for driving the backlight unit,
Each of the plurality of pixels includes a liquid crystal cell driven according to a data voltage corresponding to the correction data supplied from the panel driver to adjust a transmittance of light emitted from the backlight unit. . The method of claim 9,
The data processing apparatus further includes a local dimming unit which divides the display panel into a plurality of blocks, analyzes correction data of each block, calculates backlight dimming data for each block, and supplies the backlight dimming data to the backlight driver.
And the backlight driver individually controls light sources of the backlight unit arranged to irradiate light individually to each block of the display panel according to the backlight dimming data for each block. Analyze the input data of the input image to extract the ROI and the uninterested region except for the ROI where a certain portion is highlighted on one screen, and extract the ROI based on the input data of each of the ROI and the uninterested region. Generating a difference between the gain value and the gain value of the uninterested region (A); And
Correcting input data of the region of interest according to the gain value of the region of interest and correcting the input data of the region of interest of the uninterested region according to the gain value of the region of interest; And
Outputting said correction data (C). The method of claim 11,
The generating of the gain value of the ROI may include generating a gain value of the ROI to maintain the brightness of the ROI at a brightness corresponding to the input data of the ROI. The method of claim 11,
Generating the gain value of the uninterested region,
Comparing the image reference brightness level with an image brightness level calculated from input data in units of frames (A1); And
Analyzing the input data of the uninterested region so as to correspond to the comparison result, and generating a gain value of the uninterested region for reducing the brightness of the uninterested region (A2). Way. The method of claim 13,
As a result of the comparison of the step A1, when the image reference brightness level is equal to or higher than the image brightness level, the step A2 calculates the brightness level of the uninterested region from the input data of the uninterested region and thus the ratio. Generating a gain value of the uninterested region for reducing the brightness of the region of interest (A2-1). 15. The method of claim 14,
Step (A2-1),
Calculating an allowance for decreasing the brightness of the uninterested region according to the brightness level of the uninterested region; And
Generating a gain value of the uninterested region for reducing the brightness of the uninterested region by the brightness reduction allowance;
The amount of reduction in brightness of the uninterested region increases as the brightness level of the uninterested region increases. The method of claim 13,
As a result of the comparison of the step A1, when the image reference brightness level is lower than the image brightness level, the step A2 calculates an image complexity of the uninterested region from the input data of the uninterested region and thus the uninterested region. Generating (A2-2) a gain value of the uninterested region to reduce the brightness of the signal. 17. The method of claim 16,
Step (A2-2),
Calculating a brightness reduction allowance of the uninterested region according to the image complexity of the uninterested region; And
Generating a gain value of the uninterested region for reducing the brightness of the uninterested region by the brightness reduction allowance;
The brightness reduction allowance of the uninterested region decreases as the image complexity of the uninterested region increases. A driving method of an image display apparatus including a display panel having a plurality of pixels formed for each pixel region defined by intersections of a plurality of gate lines and a plurality of data lines.
Generating correction data using the data processing method according to any one of claims 11 to 17; And
And driving each pixel based on the correction data. The method of claim 18,
Each of the plurality of pixels is formed in the pixel area and outputs a data current corresponding to the correction data; And a light emitting cell that emits light by data current supplied from the cell driving circuit.
The driving of each pixel based on the correction data comprises supplying the correction data to the cell driving circuit to emit light according to a data current corresponding to the correction data. The method of claim 18,
Each of the plurality of pixels is configured to include a liquid crystal cell formed in the pixel area to adjust the transmittance of light irradiated from the backlight unit to the display panel.
The driving of each pixel based on the correction data comprises driving the liquid crystal cell according to a data voltage corresponding to the correction data. 21. The method of claim 20,
Dividing the display panel into a plurality of blocks, and calculating backlight dimming data for each block based on correction data of each block; And
And separately driving light sources of the backlight unit arranged to individually irradiate light to each block of the display panel according to the backlight dimming data for each block. Way.

Images