KR100741971B1 - Driving Method of Organic Electro Luminescence Display Device - Google Patents

Abstract

A driving method for uniformly correcting luminance with respect to a boundary region of each organic electroluminescent display panel provided in an organic electroluminescent display is disclosed. In the method of driving an organic electroluminescent display device, a luminance value is uniformly adjusted so that a luminance difference does not occur for each boundary region of each organic electroluminescent display panel provided in the organic electroluminescent display device. Eliminates nonuniformities that appear in

Boundary area, reference luminance value, first and second compensation data

Description

Driving method of organic electroluminescent display device {Driving Method of Organic Electro Luminescence Display Device}

1 is a view showing a plurality of organic EL display panels of an organic EL display device according to an embodiment of the present invention.

2 is a flowchart illustrating a method for correcting luminance input to boundary regions of a plurality of organic EL display panels according to an exemplary embodiment of the present invention.

The present invention relates to a method of driving an organic electroluminescent display device, and more particularly, to adjust a uniform luminance value so that a luminance difference does not occur for each boundary region of each organic electroluminescent display panel. The present invention relates to a method of driving an organic electroluminescent display device that eliminates nonuniformity occurring in a region.

Recently, organic electroluminescent display devices have advantages such as fast response time, high contrast ratio, wide viewing angle, power saving, and the like, and are used in high performance mobile phones, digital cameras, and high performance home appliances than liquid crystal displays. In addition, the organic EL display device is attracting attention as a next-generation flat panel display device because it has excellent luminance characteristics and viewing angle characteristics as compared to the liquid crystal display device.

In particular, a tiling type organic electroluminescence display device of an organic EL display device is one of flat panel displays manufactured by connecting a plurality of organic EL display panels to each other, and a consumer who wants to receive a larger image. Is provided to them. Accordingly, the tiling type organic EL display device in which a plurality of organic EL display panels, which are the final goals of the organic EL display device, are tiled and provided is a next-generation flat panel display device that responds to technological developments requiring the broadband era.

SUMMARY OF THE INVENTION An object of the present invention is to drive an organic electroluminescent display device that eliminates nonuniformity appearing in the boundary region of the organic electroluminescent display panel by adjusting the luminance to a uniform luminance value so that a luminance difference does not occur in each boundary region of each organic electroluminescent display panel. To provide a way.

A method of driving an organic electroluminescent display device in which a plurality of organic electroluminescent display panels having a plurality of pixels displaying a predetermined image are tiled to display a single image, the reference luminance of a boundary region of each organic electroluminescent display panel Setting a value; Measuring luminance values of a boundary area of each organic electroluminescent display panel as input data for displaying an image is received; Comparing the measured luminance value with the reference luminance value; Generating compensation data when the luminance value and the reference luminance value do not match; Generating correction data by adding or subtracting the input data and the compensation data; And displaying the image in the boundary area of each organic electroluminescent display panel by inputting the correction data to the boundary area of each organic electroluminescent display panel.

Hereinafter, described in detail with reference to the accompanying drawings of the present invention.

Example

1 is a view showing a plurality of organic EL display panels of an organic EL display device according to an embodiment of the present invention.

Referring to FIG. 1, a data driver for generating image data includes a first unit display panel 100, a second unit display panel 200, a third unit display panel 300, and a fourth unit display panel 400. In the organic EL display device provided, the first unit display panel 100, the second unit display panel 200, the third unit display panel 300, and the fourth unit display panel 400 are tiled with each other. Is connected.

The first unit display panel 100 receives and displays the first image data of D0, D1, .., D478, D479 generated from the data driver, and the second unit display panel 200 displays the data. The second image data of D482, D483, D960, D961 generated by the driver is received and displayed. In addition, the third unit display panel 300 receives and displays third image data of D964, D965, .. D1442, D1443 generated from the data driver, and the fourth unit display panel 400 displays the data. The fourth image data D1446, D1447, D1924, D1925 generated by the driver is received and displayed.

That is, the first unit display panel 100, the second unit display panel 200, the third unit display panel 300, and the fourth unit display panel 400 may include the first image data, the second image data, In the display of a predetermined image by receiving the third image data and the fourth image data, the data driver is formed between the first unit display panel 100 and the second unit display panel 200. In order to prevent the predetermined video data D480 and D481 from being applied, a blanking process is blocked.

Here, the first, second, third and fourth unit display panels 100, 200, 300, and 400 provided in the organic EL display device are not limited to only four unit display panels tiled, but a plurality of unit displays including four or more units. Note that the panel is tiled.

In addition, the data driver blocks and blanks the predetermined image data D962 and D963 by a gap formed between the second unit display panel 200 and the third unit display panel 300.

In addition, the data driver blocks and blanks the predetermined image data D1444 and D1445 by a gap formed between the first unit display panel 100 and the fourth unit display panel 400.

Next, a more detailed description according to an embodiment of the present invention will be described.

Since the first unit display panel 100 is tiled with the second unit display panel 200, the boundary area A 110 formed on the first unit display panel is a first boundary area of the second unit display panel. Adjacent to B 210 and connected to each other. That is, the one or more data lines formed in the boundary area A 110 of the first unit display panel may include data selected from one or more of first image data D0, D1,... D478, and D479 applied from the data driver. Receive 1: 1 correspondence.

Therefore, one or more selected data formed in the boundary area A 110 among the first image data D0, D1,..., D478, and D479 output a predetermined gamma voltage, and a predetermined state according to the gamma voltage. The luminance value is represented.

Next, the first boundary area B 210 formed in the second unit display panel 200 is adjacent to and connected to the boundary area A 110 of the first unit display panel. That is, at least one data line formed at the first boundary area B 210 of the second unit display panel is selected from at least one of the second image data D482, D483, .., D960, D961 applied from the data driver. Receive 1: 1 correspondence with data.

Therefore, one or more selected data formed in the boundary area B 210 among the second image data D482, D483, .., D960, D961 output a predetermined gamma voltage and a predetermined state according to the gamma voltage. The luminance value is represented.

Next, the second boundary region B ′ 220 formed in the second unit display panel 200 is adjacent to and connected to the boundary region C 310 of the third unit display panel. That is, at least one data line formed at the second boundary area B ′ 220 of the second unit display panel is at least one of the second image data D482, D483, .., D960, D961 applied from the data driver. Receive 1: 1 correspond with selected data.

Accordingly, one or more selected data formed in the boundary region B ′ 220 among the second image data D482, D483,..., D960, D961 output a predetermined gamma voltage, and according to the gamma voltage, State luminance values are represented.

Next, the boundary area C 310 formed on the third unit display panel is adjacent to and connected to the second boundary area B ′ 220 of the second unit display panel. That is, one or more data lines formed in the boundary region C 310 of the third unit display panel may be selected from at least one of third image data D964, D965,..., D1442, D1443 applied from the data driver. Receive 1: 1 correspondence.

Accordingly, one or more selected data formed in the boundary region C 310 among the third image data D964, D965,..., D1442, and D1443 output a predetermined gamma voltage and a predetermined state according to the gamma voltage. The luminance value is represented.

Next, the boundary region E 410 formed in the fourth unit display panel 400 is tiled adjacent to a predetermined boundary region existing in the first unit display panel 100. That is, one or more first wires intersecting the data lines of the fourth unit display panel 400 and formed in the boundary area E 410 are fourth image data D1446, D1447, .., D1924 applied from the data driver. , D1925) and 1: 1 correspondence.

However, it is noted that the first wiring formed in the boundary region E 410 is one or more selected among the first wirings formed up to L0, L1,.

Accordingly, the fourth image data D1446, D1447, .., D1924, D1925 outputs a predetermined gamma voltage through one or more selected first wirings formed in the boundary region E 410, and according to the gamma voltage. Display the luminance value.

2 is a flowchart illustrating a method for correcting luminance input to boundary regions of a plurality of organic EL display panels according to an exemplary embodiment of the present invention.

Referring to FIG. 2, each unit display panel named by each of the organic EL display panels formed on the plurality of organic EL display panels receives tiled image data and is tiled with each other to have a large screen. That is, when each unit display panel is tiled with each other, the driving method of the organic electroluminescent display device is to implement a method for correcting the luminance represented by each boundary region of each unit display panel.

First, when a person skilled in the art wants to have the same luminance for each boundary region of each unit display panel, a reference luminance value suitable for the same luminance is set in advance (S1).

That is, the boundary area of each unit display panel receives predetermined input data output through the data driver, and the organic EL display measures the first luminance value according to the input data (S2).

Next, the organic EL display device compares the measured first luminance value with the reference luminance value (S3). If the measured first luminance value and the reference luminance value are the same, the organic EL display device inputs the measured first luminance value to a boundary area of each unit display panel so as to display the desired luminance. . However, when the measured first luminance value does not coincide with the reference luminance value, the organic EL display device measures the measured first luminance to make the measured first luminance value equal to the reference luminance value. In operation S4, first compensation data, which is data having a value corresponding to a difference between a value and the luminance value, is generated.

Accordingly, the EL display device adds or subtracts the input data and the first compensation data in which the first luminance value is formed (S5) to generate first correction data through an arithmetic operation (S6). That is, the first correction data is data obtained by adding and subtracting the first compensation data to the input data such that the measured luminance value is equal to the reference luminance value.

Next, the organic EL display device applies the first correction data to the boundary region of each unit display panel (S7), and then measures the measured second luminance value according to the first correction data (S8).

Accordingly, the organic EL display device compares the measured second luminance value with the reference luminance value (S9). If the measured second luminance value and the reference luminance value are the same, the organic EL display device inputs the measured second luminance value to a boundary area of each unit display panel to display the desired luminance. However, when the measured second luminance value and the reference luminance value do not coincide, the organic EL display device generates second compensation data to generate the same luminance value as the reference luminance value (S10).

Next, the organic EL display device adds or subtracts the first correction data and the second compensation data that form the first luminance value through an arithmetic operation (S11). In other words, the organic EL display generates second correction data obtained by adding and subtracting the first correction data and the second compensation data (S12).

Accordingly, the organic EL display device applies the second correction data to the boundary region of each unit display panel (S13), and then measures the measured third luminance value according to the second correction data (S14). .

Next, the organic EL display device compares the measured third luminance value with the reference luminance value (S15). If the measured third luminance value and the reference luminance value are the same, the organic EL display device inputs the measured third luminance value to a boundary area of each unit display panel and displays the desired luminance. However, when the measured third luminance value and the reference luminance value do not coincide, the organic EL display generates second compensation data again to produce the same luminance value as the reference luminance value (S10). That is, if the measured third luminance value does not match the reference luminance value, the organic EL display returns to step S10 to regenerate the second compensation data.

Summary of the Invention According to the present invention, in displaying an image according to data sequentially applied from a data driver to a plurality of tiled display panels, a line formed in the boundary area so that the boundary area generated by tiling has a constant luminance. The luminance values of the input data sequentially applied to the measurement data are measured, and when the luminance values are the same as the reference luminance values, the luminance values are input to the boundary region for display. However, if the measured luminance value is different from the reference luminance value, the input data must be compensated to compensate for the reference luminance value. Such correction forms one limited loop until the luminance value of the data applied to the line formed in the boundary region or the compensated correction data is displayed equal to the reference luminance value.
While the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated.

delete

According to the present invention described above, the method of driving an organic electroluminescent display device is tuned to a uniform luminance value so that a luminance difference does not occur for each boundary region of each organic electroluminescent display panel included in the organic electroluminescent display device. The effect of eliminating the nonuniformity appearing in the boundary region of the electroluminescent display panel is achieved.

Claims (5)

A method of driving an organic electroluminescent display device in which an organic electroluminescent display panel having a plurality of pixels displaying a predetermined image is tiled to display a single image. Setting a reference luminance value according to a boundary area of each organic electroluminescent display panel; Measuring luminance values of the boundary areas of the organic electroluminescent display panels as the input data for displaying the image is transferred to the boundary areas of the organic electroluminescent display panels; Comparing the measured luminance value with the reference luminance value; Generating compensation data when the measured luminance value and the reference luminance value do not match; Generating correction data by adding or subtracting the input data and the compensation data; And As the correction data is input to the boundary region of each organic electroluminescent display panel, the boundary region of each organic electroluminescent display panel has a corrected luminance value and displays an image. . The method of claim 1, wherein the driving method of the organic light emitting display device comprises: generating the correction data; Resetting the compensation data by comparing the luminance value according to the correction data with the reference luminance value; And And regenerating correction data corresponding to the reset compensation data. The method of claim 2, wherein the compensation data is a digital value generated to compensate for a difference between the luminance value and the reference luminance value. The method of claim 1, wherein the boundary area is an area in which at least one of the plurality of data lines wired in a first direction for receiving predetermined image information is arranged. The method of claim 4, wherein the boundary area is an area in which at least one of the plurality of first wires intersecting the plurality of data lines and wired in a second direction is disposed.

Images