KR101536300B1 - Curved liquid crystal display device - Google Patents

Abstract

The present invention provides a curved liquid crystal display device capable of realizing more clean and clear high definition by alleviating definition deterioration. To this end, the curved liquid crystal display device comprises: a curved liquid crystal panel consisting of a plurality of pixels; a first storing unit for storing first compensation data obtained by compensating initial voltage data applied to the pixels according to an optical path (d′) of light penetrating liquid cells respectively corresponding to the pixels by horizontally moving; a timing controller for applying compensation voltage data to the pixels based on the first compensation data; a light source PCB arranged on a panel and having a plurality of unit light source PCBs, with two to four light sources respectively mounted thereon, selected to form a plurality of rows or lines; a second storing unit for storing second compensation data obtained by compensating an initial electric current applied to the unit light source PCBs so that strength of light irradiated from each pixel or particular region of the curved liquid crystal panel coincides in a first position; and a light source inverter for applying an electric current respectively compensated on the unit light source PCBs based on the second compensation data.

Description

[0001] Curved liquid crystal display device [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a curved liquid crystal display device capable of improving image quality deterioration and realizing a clearer and clear high quality image.

As the information society develops, the demand for display devices for displaying images is increasing in various forms. A liquid crystal display (LCD) device, a plasma display panel (PDP), or an organic light emitting diode (OLED) device as compared with a conventional cathode ray tube (CRT) ) Display device is actively researched and commercialized.

On the other hand, the flat panel display device has a problem in that the distance from the display screen is varied.

That is, since the display device is manufactured in the form of a flat plate, the distance from the main viewing area to the central area of the display screen and the distance from the main viewing area to both side areas of the display screen are different, do.

Such a distance deviation can be improved by bending the display screen to a curved surface, which is generally referred to as a curved display.

On the other hand, the curved surface type liquid crystal display of the curved display device has a curved surface, so that even if the same data voltage is applied to each pixel, the brightness, contrast, color, gamma, Type liquid crystal display device, the image quality characteristic deteriorates.

Particularly, as the bending angle becomes larger, the problem of deterioration of image quality becomes larger.
Further, the technology of the background of the present invention is disclosed in Korean Patent Laid-Open Nos. 10-2014-0025220 and 10-2014-0036461.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a curved surface liquid crystal display device having improved image quality by correcting a voltage applied to each pixel or a current value applied to a light source.

According to an aspect of the present invention, there is provided a liquid crystal display device including: a curved liquid crystal panel including a plurality of pixels; (D ') of light passing through a liquid crystal cell corresponding to each of the plurality of pixels in a horizontal direction and storing first correction data corrected for initial voltage data applied to the plurality of pixels, A storage unit; A timing controller for applying correction voltage data to the plurality of pixels based on the first correction data; A light source package disposed on the panel, the light source package having a plurality of unit light source package cases each having two to four light sources mounted thereon, the light source package having a plurality of rows or columns; And a second storage unit for storing second correction data obtained by correcting an initial current applied to the plurality of unit light source PCBs so that intensity of light radiated from each pixel or a predetermined area of the curved liquid crystal panel is the same at a first position, ; And a light source inverter for applying a corrected current to each of the plurality of unit light source PCBs based on the second correction data.

The optical path d 'may be expressed by the following equation: d' = d / cos (?) Where? = Sin¹ (L / R), d is the thickness of the liquid crystal cell, A distance away from the center in the vertical direction, and R is a radius of the curved shape).

When the curved liquid crystal panel is bent to the left and right, the light source panel is arranged in a plurality of rows on the panel, and when the curved liquid crystal panel is bent up and down, the light source is arranged in a plurality of rows on the panel .

The first storage unit is embedded in the timing controller.

In addition, the second storage unit is embedded in the light source inverter.

Further, a single gray level external image signal is applied to the curved liquid crystal panel,

The image pickup section picks up the luminance of the curved liquid crystal panel before and after the external video signal is applied in front of the curved liquid crystal panel to extract the first and second luminance data, 1 and the second luminance data, and the central control unit applies the third correction data to the first storage unit or the second storage unit.

The liquid crystal display device according to claim 1, wherein an external video signal is applied to the curved liquid crystal panel for each of a plurality of gradations and the image pickup section picks up the luminance of the curved liquid crystal panel before and after the external video signal is applied in front of the curved liquid crystal panel, And the second luminance data, and the data processing unit calculates the first and second luminance data for each pixel or the predetermined area to store the fourth correction data, and the central control unit supplies the fourth correction data to the first To the storage unit or the second storage unit.

The plurality of curved liquid crystal panels are arranged on the same plane, and a single gradation external video signal is applied to the plurality of curved liquid crystal panels. The luminance data of the plurality of curved surface liquid crystal panels before and after the curved liquid crystal panel is picked up to extract the fourth and fifth luminance data and the data processing unit calculates the fourth and fifth luminance data for each of the curved liquid crystal panels The fifth correction data is stored, and the central control unit applies the fifth correction data to the first storage unit or the second storage unit.

The liquid crystal panel according to claim 1, wherein the plurality of curved liquid crystal panels are arranged on the same plane, and an external video signal is applied to each of the plurality of curved liquid crystal panels for each of a plurality of gradations, The first and second luminance data are picked up by respectively capturing the luminance of the plurality of curved surface type liquid crystal panels before and after the application of each of the plurality of curved surface type liquid crystal panels, The sixth correction data calculated and calculated, and the central control unit applies the sixth correction data to the first storage unit or the second storage unit.

It is possible to improve a picture quality deterioration of a curved surface type liquid crystal display device by correcting a voltage applied to a pixel or a current value applied to a backlight, thereby realizing a curved liquid crystal display device with a clearer picture quality.

1 is a view showing an optical path of light passing horizontally and passing through a liquid crystal panel of a flat panel type liquid crystal display device.
2 is a view showing an optical path of light passing horizontally and passing through a liquid crystal panel of a curved liquid crystal display device.
3 is a block diagram of a curved liquid crystal display device according to the first embodiment of the present invention.
4 is a view showing an optical path of light emitted from a curved liquid crystal panel at a first position.
5 is a block diagram of a curved-surface liquid crystal display device according to a second embodiment of the present invention.
6 and 7 are views showing a light source array and a light source inverter according to a second embodiment of the present invention.
8 is a block diagram of a curved surface type liquid crystal display device according to the third to sixth embodiments of the present invention.

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

≪ Embodiment 1 >

As the physical arrangement of the liquid crystal molecules changes, the phase delay value (G? N: G: cell gap, n: refractive index) of the incident light that is linearly polarized varies in the liquid crystal display device.

That is, the incident light, which is linearly polarized according to the phase delay value, passes through the liquid crystal cell and becomes linearly polarized light, circularly polarized light, or linearly polarized light rotated by 90 degrees.

When an electric field corresponding to the difference between the data voltage and the common voltage applied to the pixel electrode is applied to the liquid crystal, the physical arrangement of the liquid crystal molecules is changed and the light is transmitted at a transmittance corresponding to the intensity of the electric field.

 At this time, the transmittance is determined by the dielectric anisotropy of the liquid crystal, the thickness of the liquid crystal cell, and the data voltage applied to the pixel electrode.

 At this time, the transmittance T is defined by Equation (1).

[Equation 1]

 T α sin 2 (2 * Δn * d / λ)

Where T is the transmittance,? N is the anisotropic refractive index difference of the liquid crystal cell due to the data voltage, d is the vertical thickness of the liquid crystal cell, and? Is the wavelength of the light transmitted through the liquid crystal cell.

In particular, when the same data voltage is applied to a plurality of pixels, the transmittance of light passing through the liquid crystal cell that advances horizontally and corresponds to each of the plurality of pixels is set to a vertical thickness of the liquid crystal cell, Lt; / RTI >

Fig. 1 is a view showing an optical path of light passing through a liquid crystal panel of a planar type liquid crystal display device as it goes horizontally, Fig. 2 is a view showing an optical path of light passing through a liquid crystal panel of a curved- Fig.

1 and 2, the flat panel type and the curved type liquid crystal panels 10 and 100 include first and second substrates 1 and 101 including a thin film transistor (not shown) and a color filter (not shown) 2 substrates 103 and 103 and liquid crystal layers 2 and 102 sandwiched between the first and second substrates 101 and 103 and 103, respectively.

Further, Ray1 is the light passing through the liquid crystal cell in the center of the flat panel type and the curved surface type liquid crystal panel 10, 100 as it proceeds horizontally, and Ray2 is horizontally progressing, and the flat panel type and curved type liquid crystal panels 10, And L is the radius of curvature of the curved surface type liquid crystal display device.

For example, when a data voltage V0 corresponding to a specific video signal is applied to all the pixels of the flat panel liquid crystal display device, since the liquid crystal panel does not form a curved surface, The optical path d 'of the Ray 2 passing through the liquid crystal cell at a position which is horizontal with respect to the optical path d of the Ray 1 passing through the liquid crystal cell of the liquid crystal cell 10 and is L in the vertical direction from the center of the liquid crystal panel 10.

However, when a data voltage V0 corresponding to a specific video signal is applied to all the pixels of the curved-type liquid crystal display device, as the liquid crystal panel is formed into a curved surface, The optical path d 'of the Ray 2 passing through the liquid crystal cell at a position separated by L is longer than the optical path d of the Ray 1 passing through the liquid crystal cell at the center of the curved liquid crystal panel 100.

At this time, the optical path d 'of Ray 2 is defined by Equation (2).

&Quot; (2) "

 d '= d / cos?

 Where d is the thickness of the optical path or the liquid crystal cell of Ray 1,? = Sin-1 (L / R), R is the radius of curvature of the curved liquid crystal panel, L is the point spaced vertically from the center of the curved liquid crystal panel Of the liquid crystal cell.

That is, as the distance L of the liquid crystal cell at a position vertically away from the center of the curved liquid crystal panel 100 having the curved surface radius R is increased, the optical path of the light passing through the liquid crystal cell becomes longer.

In addition, when the curved surface radius R of the curved liquid crystal panel 100 is different, the optical path of the light passing through the liquid crystal cell at a position that is horizontal and is L in the vertical direction from the center of the curved liquid crystal panel 100, The larger the R, the longer.

As described above, optical paths of light passing through the liquid crystal cell corresponding to each pixel are different, and even if the same data voltage is applied to each pixel, different optical characteristics are exhibited in transmittance, gradation gamma characteristic, color characteristic, And image quality deterioration occurs.

3 is a block diagram of a curved liquid crystal display device according to the first embodiment of the present invention.

As shown in the drawing, a curved-surface liquid crystal display device according to the first embodiment of the present invention is a curved-surface liquid crystal display device in which a curved-surface liquid crystal panel 100 composed of a plurality of pixels horizontally passes through a liquid crystal cell corresponding to each of the plurality of pixels A first storage unit 150 for storing first correction data obtained by correcting the initial voltage data applied to the plurality of pixels in accordance with d 'of the equation (2), and a second storage unit 150 for storing, based on the first correction data, And a timing controller (130) for applying correction voltage data to the plurality of pixels.

At this time, the first storage unit 150 in which the first correction data is stored may be separately formed in the curved liquid crystal display, or may be incorporated in the timing controller 130.

Specifically, the first correction data extraction method will be described. The phase delay value according to the optical path of the Ray 1 transmitting through the liquid crystal cell at the center of the curved liquid crystal panel 100 is denoted by delta 1, the center of the curved liquid crystal panel 100 And? 2 is a phase delay value according to the optical path of Ray2 passing through the liquid crystal cell at a position distant by L in the vertical direction,

&Quot; (3) "

? 1 =? n * d

Here, d is the thickness of the optical path or the liquid crystal cell of Ray1, and? N is the anisotropic refractive index difference of the liquid crystal cell due to the data voltage VO.

&Quot; (4) "

? 2 =? n '* d'

Here, d 'is the optical path of Ray 2, and Δn' is the anisotropic refractive index difference of the liquid crystal cell due to the corrected data voltage V0 '.

At this time,? 2 in the equation (4) becomes? N '* d / cos? According to the equation (2).

That is, when the data voltage V0 corresponding to the specific data signal is applied to all the pixels of the curved liquid crystal display,? N and? N 'are the same, and the optical path d' of Ray2 is d / cos? Becomes longer than the optical path d of Ray1, and δ2 becomes larger than δ1.

Therefore, in order to compensate for the image quality difference due to the optical path,? 2 and? 1 need to be equal to each other. In this case,? N '* d' =? N * d is obtained by Equation (3) By applying the corrected data voltage V0 'whose value is? N * d / d' or? N * cos? To a pixel located at a distance L in the vertical direction from the center of the curved liquid crystal panel 100 to make? 2 and? .

Specifically, after applying the same data voltage V0 to all the pixels of the curved-type liquid crystal display device, the corrected data voltage V0 'is calculated so that the value of n' is equal to? N * d / d ' And extracts the first correction data corresponding thereto.

In this case, the first correction data is stored in the first storage unit 150, and when the external image signal is applied to the curved liquid crystal display device, the timing controller 130 stores initial voltage data in the first storage unit 150 And applies correction voltage data to a plurality of pixels based on the first correction data.

Accordingly, the voltage value applied to each pixel is corrected to improve the deterioration of the image quality of the curved-surface type liquid crystal display device, thereby realizing a clearer, clean high-quality curved-surface type liquid crystal display device.

In addition, if the curved liquid crystal panel is warped to the left or to the right without performing correction for each pixel, image quality deterioration can be compensated for only by adjusting the size of the data voltage applied to the data line according to the distance from the center of the curved liquid crystal panel 100, And the amount of memory in the storage unit.

≪ Embodiment 2 >

The second embodiment of the present invention is a curved type liquid crystal display device having a clearer image quality through the light source inverter control in addition to the first embodiment.

4 is a view showing an optical path of light emitted from a curved liquid crystal panel at a first position.

As shown in the figure, Ray11 is the light emitted from the curved liquid crystal panel 100 from the center of the curved liquid crystal panel 100 to the first position 110, and Ray 12 is the light emitted from the curved liquid crystal panel 100 Is a light emitted from the curved liquid crystal panel 100 from a distance L away from the center in the vertical direction to the first position 110.

At this time, the first position 110 may be, for example, a viewer's viewing position or an imaging position of the imaging section.

 Further, the intensity I (PHI) of the light measured at the first position 110 is defined by Equation (5).

&Quot; (5) "

I (?) = I * cos? (?)

I is the intensity of Ray 11 measured at the first position 110, L is the distance from the center of the curvilinear liquid crystal panel 100 to the vertical position, X is the curved surface shape The light emitted from the curved liquid crystal panel 100 is radiated at the same brightness on all the surfaces and the intensity distribution of the light is radiated from the center of the liquid crystal panel 100 to the first position 110, Respectively.

According to Equation (5), in order to measure Ray 11 and Ray 12 at the first position 110 with the same intensity of light, the intensity Y (?) Of Ray 12 is defined by Equation (6).

&Quot; (6) "

Y (?) = Y / cos? (?)

L denotes a distance from the center of the curved liquid crystal panel 100 to a point where the ray 11 is vertically separated from the center of the curved liquid crystal panel 100, X is a distance from the center of the curved liquid crystal panel 100 to the first position 110. At this time, the light emitted from the curved liquid crystal panel 100 is radiated at the same brightness on all surfaces, Has a Rambo cyan characteristic.

Therefore, in order that the light at the center of the curved liquid crystal panel 100 and the light L in the direction perpendicular to the center can be measured at the same intensity at the first position 110, the intensity Y (PHI) The intensity of Y / cos (Φ) greater than the intensity Y of the light of the liquid crystal panel should be emitted at the L position of the liquid crystal panel.

FIG. 5 is a block diagram of a curved surface liquid crystal display device according to a second embodiment of the present invention, and FIGS. 6 and 7 are views showing a light source array and a light source inverter according to a second embodiment of the present invention.

As shown in the figure, in a curved surface type liquid crystal display device according to the second embodiment of the present invention, in addition to the components of the first embodiment, a panel 210, a plurality of light sources 225 arranged on a panel 210, A light source array 200 including a plurality of light source device packages 220 arranged and arranged in a curved surface type liquid crystal panel 100, A second storage unit 250 for storing second correction data obtained by correcting an initial current applied to the plurality of light source device units 220 so that the plurality of light source device units 220 are the same, And a light source inverter 230 for applying a corrected current to each of the light sources.

At this time, the second storage unit 250, in which the second correction data is stored, may be separately formed in a curved liquid crystal display or may be embedded in the light source inverter 230.

The curvilinear liquid crystal panel 100 may include a plurality of light source panel units 220 arranged on the panel 210 such that the curvilinear liquid crystal panel 100 is vertical in length, Are arranged on the panel 210 in a single row with the length thereof being horizontal.

Accordingly, the light source inverter 230 applies the corrected current to the plurality of light source device units 220 based on the second correction data stored in the second storage unit 250, thereby improving the image deterioration of the curved liquid crystal display device So that a curved liquid crystal display device of a clearer and clear high quality can be realized.

Although not shown in the drawing, the light source package is characterized by comprising a plurality of unit light source package housings in which two to four light sources are mounted and arranged in a plurality of rows or columns.

Also, at this time, the light source inverter is connected to each of the plurality of unit light source unit charges to apply the current.

At this time, if a plurality of unit light source package ratios having two to four light sources are selectively arranged, the light source package including all the light sources of two or more can be constituted by one row or one row.

Therefore, by applying a current to each of the plurality of unit light source PCBs, the luminance is adjusted for each area of the curved surface type liquid crystal display device by improving the deterioration of image quality of the curved surface type liquid crystal display device, A display device can be implemented.

In addition, image quality deterioration can be compensated for by adjusting the magnitude of the current applied to the light source device 200 according to the distance from the center of the curved liquid crystal panel 100, which is effective in reducing the production cost and the memory size of the storage unit.

≪ Third Embodiment >

8 is a block diagram of a curved-surface liquid crystal display device according to a third embodiment of the present invention.

As shown in the figure, a curved-surface liquid crystal display device according to a third embodiment of the present invention is the curved-surface liquid crystal display device according to the second embodiment, in which a single-gradation external video signal is applied to the curved liquid crystal panel 100, ) Picks up the luminance of the curved liquid crystal panel 100 before and after the external video signal is applied in front of the curved liquid crystal panel 100 to extract the first and second luminance data, And the central control unit 350 stores the third correction data in the first storage unit 150 or the second storage unit 150. [ To the second storage unit (250).

The ambient light in the external environment is reflected by the surface of the curved liquid crystal panel 100 and enters the lens unit of the image sensing unit 300 and the image sensor to have a constant brightness and color data, The distorted data may be generated by blending with the luminance or color information actually emitted from the light source.

In order to remove such distorted data, in a state where the image pickup unit 300 does not apply an external video signal to the curved liquid crystal panel 100, that is, in a state of only external environment illumination, The first and second luminance data are picked up by applying the luminance and the monochromatic external video signal reflected by the panel 100 and the luminance of the curved liquid crystal panel 100 respectively and the data processing unit 330 The central controller 350 stores the third correction data in the first storage unit 150 or in the second storage unit 150, To the second storage unit (250).

At this time, the image sensing unit 300 measures the luminance of each pixel or a predetermined region, and extracts first and second luminance data corresponding to each pixel or each predetermined region.

In addition, the data processing unit 330 calculates the average value of the third luminance data obtained by subtracting the first luminance data from the second luminance data for each pixel or the predetermined area, and the third luminance data, which is smaller or larger than the average value, And calculates correction data.

The central control unit 350 applies the third correction data to the first storage unit 150 or the second storage unit 250. In the low gray area, the image quality unevenness is mainly caused by the difference in the data signal In general, the image quality is not uniform in the high gray range, and the central controller 350 controls the brightness of each pixel (for example, And corrects the current applied to the light source in the case of a high gray level.

Accordingly, the central control unit 350 may apply the third correction data to the first storage unit 150 to correct the first correction data stored in the first storage unit 150, or to apply the third correction data to the second storage unit 150 250 to correct the second correction data stored in the second storage unit 250 so that the image quality of the curved liquid crystal display device can be clearly realized.

<Fourth Embodiment>

8 is a block diagram of a curved liquid crystal display device according to a fourth embodiment of the present invention.

In the curved surface type liquid crystal display device according to the fourth embodiment of the present invention, the external image signal is applied to the curved surface type liquid crystal panel 100 every plural gradations, Type liquid crystal panel 100 before and after the application of the external video signal in front of the liquid crystal panel 100, extracts the first and second luminance data, and the data processing unit 330 extracts the first and second luminance data, Or the first and second brightness data by a predetermined area to store the fourth correction data and the central control unit 350 may supply the fourth correction data to the first storage unit 150 or the second storage unit 250).

Specifically, in a state in which the image pickup unit 300 does not apply an external video signal to the curved liquid crystal panel 100, that is, in a state of only surrounding illumination, the ambient illuminance is reflected by the curved liquid crystal display And the luminance of the curved liquid crystal display device is imaged for each of a plurality of gradations, and first and second luminance data are extracted for each of a plurality of gradations.

At this time, the image sensing unit 300 measures the luminance of each pixel or a predetermined region, and extracts first and second luminance data corresponding to each pixel or each predetermined region.

The data processing section 330 calculates the average value of the third luminance data obtained by subtracting the first luminance data from the second luminance data for each gradation, and calculates the average value of the third luminance data, which is smaller or larger than the average value, 3 &lt; / RTI &gt;

Next, the data processing unit 330 generates correction gamma data by the third correction data for each gradation, and calculates and stores the fourth correction data for each pixel or each predetermined region according to the correction gamma data.

The central control unit 350 applies the fourth correction data to the first storage unit 150 or the second storage unit 250. In the low gray area, the image quality unevenness is mainly caused by the difference in the data signal In general, the image quality is not uniform in the high gray range, and the central controller 350 controls the brightness of each pixel (for example, And corrects the current applied to the light source in the case of a high gray level.

Accordingly, the central control unit 350 applies the fourth correction data to the first storage unit 150 to correct the first correction data stored in the first storage unit 150, or the fourth correction data to the second storage unit 150 250 to correct the second correction data stored in the second storage unit 250 so that the image quality of the curved liquid crystal display device can be clearly realized.

<Fifth Embodiment>

8 is a block diagram of a curved liquid crystal display device according to a fifth embodiment of the present invention.

The curved surface type liquid crystal display device according to the fifth embodiment of the present invention is the same as the curved surface type liquid crystal display device according to the second embodiment except that the curved surface type liquid crystal panels 100 are arranged on the same plane, And the brightness of the plurality of curved liquid crystal panels 100 before and after the external video signal is applied in front of the plurality of curved liquid crystal panels 100 is imaged And the data processing unit 330 stores the calculated fifth correction data by calculating the fourth and fifth luminance data for each of the curved liquid crystal panels 100, And the control unit 350 applies the fifth correction data to the first storage unit 150 or the second storage unit 250. [

The ambient light in the external environment is reflected by the surface of the curved liquid crystal panel 100 and enters the lens unit of the image sensing unit 300 and the image sensor to have a constant brightness and color data, The distorted data may be generated by blending with the luminance or color information actually emitted from the light source.

In order to remove such distorted data, in a state where the image pickup unit 300 does not apply an external video signal to the curved liquid crystal panel 100, that is, in a state of only external environment illumination, The brightness of the curved liquid crystal panel 100 and the luminance data of the curved liquid crystal panel 100 are extracted to extract the fourth and fifth luminance data, And the central control unit 350 stores the fifth correction data in the first storage unit 150 and the fifth correction data in the first storage unit 150. The fifth correction data is calculated by calculating the fourth and fifth luminance data for each curved liquid crystal panel 100, Or to the second storage unit 250.

At this time, the image pickup unit 300 measures luminance for each curved liquid crystal panel 100, and also extracts fourth and fifth luminance data corresponding to each curved liquid crystal panel 100 for each curved liquid crystal panel 100.

The data processing unit 330 calculates the average value of the sixth brightness data obtained by subtracting the fourth brightness data from the fifth brightness data for each curved liquid crystal panel 100 and sets the sixth brightness data smaller or larger than the average value as an average value And generates and stores the fifth correction data.

The central control unit 350 applies the fifth correction data to the first storage unit 150 or the second storage unit 250. In the low gray area, the image quality unevenness is mainly caused by the difference in the data signal In general, the image quality is not uniform in the high gray range, and the central controller 350 controls the brightness of each pixel (for example, And corrects the current applied to the light source in the case of a high gray level.

Accordingly, the central control unit 350 may apply the fifth correction data to the first storage unit 150 to correct the first correction data stored in the first storage unit 150 or to output the fifth correction data to the second storage unit 150 250 to correct the second correction data stored in the second storage unit 250 so that the image quality of the curved liquid crystal display device can be clearly realized.

The curved-surface liquid crystal display device of the fifth embodiment of the present invention can image a plurality of curved-surface liquid crystal display devices at the same time and correct the image quality, thereby making the manufacturing process efficient and reducing the manufacturing cost.

<Sixth Embodiment>

8 is a block diagram of a curved liquid crystal display device according to a sixth embodiment of the present invention.

The curved-surface-type liquid crystal display device according to the sixth embodiment of the present invention, in the second embodiment,

The liquid crystal display device according to claim 1, wherein the plurality of curved liquid crystal panels (100) are arranged on the same plane, an external image signal is applied to the plurality of curved liquid crystal panels (100) The luminance data of the plurality of curved liquid crystal panels 100 before and after the application of the external video signal are extracted in front of the liquid crystal panel 100 for each of a plurality of gradations to extract first and second luminance data, The central control unit 350 may store the sixth correction data in the first storage unit 150 and the sixth correction data in the first storage unit 150, Or to the second storage unit (250).

More specifically, in a state in which the image pickup unit 300 does not apply an external video signal to a plurality of curved liquid crystal panels 100, that is, in a state of only surrounding illumination, a plurality of curved liquid crystal displays After applying the luminance and the external image signal reflected by the device, the luminance of the plurality of curved type liquid crystal display devices is imaged for each of the plurality of gradations, and the fourth and fifth luminance data are extracted for each of the plurality of gradations.

At this time, the image pickup unit 300 measures luminance for each curved liquid crystal panel 100, and also extracts fourth and fifth luminance data corresponding to each curved liquid crystal panel 100 for each curved liquid crystal panel 100.

The data processor 330 calculates the average value of the sixth luminance data obtained by subtracting the fourth luminance data from the fifth luminance data for each gradation and outputs the average luminance value of the sixth luminance data 6 Calculation data is calculated.

Then, the data processing unit 330 generates correction gamma data by the sixth correction data for each gradation, and calculates and stores the seventh correction data for each curved surface type liquid crystal panel 100 according to the correction gamma data.

The central control unit 350 applies the seventh correction data to the first storage unit 150 or the second storage unit 250. In the low gray area, the image quality unevenness is mainly caused by a difference in data signal In general, the image quality is not uniform in the high gray range, and the central controller 350 controls the brightness of each pixel (for example, And corrects the current applied to the light source in the case of a high gray level.

Accordingly, the central control unit 350 applies the seventh correction data to the first storage unit 150 to correct the first correction data stored in the first storage unit 150, or to apply the fourth correction data to the second storage unit 150 250 to correct the second correction data stored in the second storage unit 250 so that the image quality of the curved liquid crystal display device can be clearly realized.

The curved surface type liquid crystal display device according to the sixth embodiment of the present invention can simultaneously image a plurality of curved liquid crystal display devices and correct the image quality, so that the manufacturing process is efficient and the manufacturing cost is reduced.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. Therefore, it should be understood that the embodiments described above are provided to fully disclose the scope of the invention to a person having ordinary skill in the art to which the present invention belongs. The invention is only defined by the scope of the claims.

100: a curved liquid crystal panel
130: timing controller
150, 250: first and second storage sections
200: Light source array
230: Light source inverter
300:
330: Data processor
350:

Claims (9)

A liquid crystal display device comprising: a curved liquid crystal panel including first and second substrates and a liquid crystal layer disposed between the first and second substrates; In a curved surface type liquid crystal display device including a plurality of pixels each having a path (optical path) passing through a liquid crystal layer,
A first storage unit for storing first correction data obtained by correcting an initial data voltage so that a data voltage applied to each of the plurality of pixels increases in proportion to the optical path;
A timing controller for applying a data signal corresponding to the data voltage to the plurality of pixels, respectively, based on the first correction data;
A light source package including a plurality of unit light source unit packages each having two to four light sources mounted thereon, the light source package having light incident on the first substrate;
A second storage unit for storing second correction data obtained by correcting an initial current applied to each of the plurality of unit light source PCBs so that intensity of light incident on each of the plurality of pixels increases in proportion to the optical path; And
And a light source inverter for applying a current to the plurality of unit light source PCBs based on the second correction data,
And a liquid crystal display panel.
The method according to claim 1,
The optical path includes:
&Lt; Equation &
d is the optical path, d is the thickness of the liquid crystal layer,? = sin? (L / R), and L is a vertical distance from the center of the curved liquid crystal panel Distance, R is the radius of curvature of the curved liquid crystal panel)
Of the curved surface type liquid crystal display device.
The method according to claim 1,
Wherein the plurality of unit light source PCs are arranged in a plurality of rows or columns.
The method according to claim 1,
Wherein the first storage unit is incorporated in the timing controller.
The method according to claim 1,
And the second storage unit is embedded in the light source inverter.
The method according to claim 1,
Type liquid-crystal panel in front of the curved-surface-type liquid-crystal panel, before and after applying the data signal,
Extracting the first luminance data before applying the data signal, extracting second luminance data after applying the data signal,
Calculates difference values of the first and second luminance data,
Calculating an average value of the difference values of the first and second luminance data and further correcting the initial data voltage or the initial current so that the difference value of the first and second luminance data of each of the plurality of pixels becomes the average value And the curved surface type liquid crystal display device.
delete The method according to claim 1,
Type liquid crystal panel in front of the plurality of curved-surface liquid crystal panels, respectively, before and after the data signal is applied,
Extracting third luminance data before application of the data signal, extracting fourth luminance data after application of the data signal, converting the intensity of the captured light into data for each of the plurality of curved liquid crystal panels,
Calculates difference values of the third and fourth luminance data,
Calculating an average value of the difference values of the third and fourth luminance data and outputting the initial data voltage or the initial current so that the difference value of the third and fourth luminance data of each of the plurality of curved liquid crystal panels becomes the average value The liquid crystal display device comprising:
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