KR100982128B1 - Method for ruggedness seed making of lcd - Google Patents

Abstract

The present invention discloses a method of forming an uneven seed in a liquid crystal display. A method of forming an uneven seed in a liquid crystal display according to the present invention includes a substrate having respective unit pixel regions defined by crossing gate lines and data lines, wherein each unit pixel has a reflective region and is adjacent to the gate line direction. This feature is characterized in that the reflection areas of a predetermined number of unit pixels are bundled together to form a basic unit of one uneven seed arrangement.

In the method of forming the uneven seed in the liquid crystal display according to the present invention, the moire phenomenon can be prevented by irregularly disposing the uneven seed formed in the reflective region.

Moiré phenomenon, uneven seed, Fibonacci

Description

Formation of uneven seed in liquid crystal display device {METHOD FOR RUGGEDNESS SEED MAKING OF LCD}

1 is a view schematically showing the structure of a conventional transflective liquid crystal display device.

FIG. 2 is a diagram illustrating an arrangement of uneven seeds of a unit pixel region in a Fibonacci array according to the related art. FIG.

FIG. 3 is a diagram illustrating arrangement of an uneven seed defined by a unit pixel according to the related art. FIG.

FIG. 4 is a view showing an arrangement of uneven seeds formed in a reflection area of each unit pixel of the liquid crystal display of the first embodiment according to the present invention; FIG.

5A and 5B show the arrangement of the uneven seed in the unit pixel region in the Fibonacci array according to the present invention.

FIG. 6 is a view showing an arrangement of uneven seeds formed in the reflective region of each unit pixel of the reflective liquid crystal display device according to the second embodiment of the present invention; FIG.

7A and 7B are views showing the arrangement of the uneven seed formed in the reflective region of each unit pixel of the reflective liquid crystal display of the third embodiment according to the present invention;

<Description of the symbols for the main parts of the drawings>                 

410, 610, 710 --- Gate Line 420, 620, 720 --- Data Line

430, 630, 730, 750 --- reflective area 440, 640, 740 --- unit pixel area

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming an uneven seed in a liquid crystal display device, and in particular, a liquid crystal display device capable of preventing moiré phenomenon by irregularly arranging the uneven seed formed in the reflective region of the reflective or transflective liquid crystal display device. It relates to a method of forming the uneven seed.

In general, a liquid crystal display device is formed by arranging two substrates on which electric field generating electrodes are formed so that the surfaces on which the two electrodes are formed face each other, injecting a liquid crystal material between the two substrates, and then applying a voltage to the two electrodes. By moving the liquid crystal molecules by the electric field, it is a device that represents the image by controlling the transmittance of the light is changed accordingly.

The liquid crystal display may be classified into a transmission type and a reflection type according to a light source to be used.

Transmissive liquid crystal display is a form of displaying the color by adjusting the amount of light according to the arrangement of the liquid crystal by injecting artificial light from the backlight (backlight) attached to the back of the liquid crystal panel to the liquid crystal The device adjusts light transmittance according to the arrangement of liquid crystals by reflecting external natural or artificial light.

The transmissive liquid crystal display uses an artificial back light source, so that bright images can be realized even in a dark environment. However, the power consumption of the transmissive liquid crystal display is large. Because the structure is dependent on the power consumption is less than the transmissive liquid crystal display device, but can not be used in a dark place has the disadvantage.

Accordingly, a semi-transmissive liquid crystal display device that combines reflection and transmission has been proposed as a device capable of appropriately selecting and using two modes according to a necessary situation.

Hereinafter, a transflective liquid crystal display device will be described with reference to the accompanying drawings.

1 is a view schematically showing a structure of a conventional transflective liquid crystal display device.

As shown in the drawing, a pixel electrode 12 made of a transparent conductive material is formed on the lower first substrate 11 including a thin film transistor (not shown) which is a switching element corresponding to one pixel region. In addition, an opening 13a serving as a transmission hole and a reflective electrode 13 having a seed pattern are formed on the pixel electrode 12.

A linear first polarizing plate 14 through which only light in a direction parallel to the light transmission axis is disposed below the first substrate 11.

The second substrate 21 is disposed on the first substrate 11 at a predetermined distance from the first substrate 11, and the pixel electrode 12 is disposed on an inner surface of the second substrate 21. ) And the color filter 22 is formed at a position corresponding to the reflective electrode 13.

The common electrode 23 made of a transparent conductive material is formed on the color filter 22.

In addition, the diffusion film 24 and the second polarizing plate 25 are sequentially disposed on the second substrate 21, and the light transmitting axis of the second polarizing plate 25 is the light transmitting axis of the first polarizing plate 14. At an angle of about 90 degrees.

The liquid crystal layer 30 is inserted between the first substrate 11 and the second substrate 21.

Meanwhile, a backlight unit 40 used as a light source in a transmissive mode is disposed below the first polarizing plate 14, and the backlight unit 40 is installed on one side of the light guide plate 42 and the light guide plate 42. And a light collecting sheet 43 and a diffusion sheet 44 which are arranged on the light guide plate 42 and the light guide plate 42. Here, the light guide plate 42 is to change the light from the lamp 41, which is a linear light source, into a surface light source, and the lower surface of the light guide plate 42 scatters the light to form a uniform surface light source so as to make a uniform surface light source. A scattering pattern (not shown) may be formed. In addition, a reflector (not shown) may be disposed below the light guide plate 42 to prevent light leakage.

In the transflective liquid crystal display device as described above, in the reflective mode, external light is emitted from the second polarizer 25, the diffusion film 24, the second substrate 21, the color filter 22, and the After passing through the liquid crystal layer 30 in order through the common electrode 23, the liquid crystal layer 30, the common electrode 23, and the color are reflected by the reflective electrode 13 having the uneven structure pattern. The filter 22 is output to the outside through the second substrate 21, the diffusion film 24, and the second polarizing plate 25.

On the other hand, the light emitted from the backlight unit 40 when the transmission mode is driven passes through the first polarizing plate 14 and the first substrate 11 and corresponds to the pixel electrode corresponding to the opening 13a of the reflective electrode 13. After passing through the liquid crystal layer 30 from 12, the common electrode 23, the color filter 22, the second substrate 21, the diffusion film 24, and the second polarizing plate are disposed on the upper side. Passed by (25) is output to the outside.

In this way, by using the transflective liquid crystal display device having the reflective electrode of the uneven seed and the pixel electrode which is the transmissive electrode, the reflective mode and the transmissive mode can be appropriately selected and used according to a necessary situation.

On the other hand, in the semi-transmissive liquid crystal display device, in order to ensure sufficient brightness when driving the reflection mode, it is conceivable to use a reflection electrode made of a metal such as aluminum or silver with high reflectance.

By the way, when the surface of the reflective electrode is flat, it causes mirror reflection and the light source is projected on the reflective electrode, and the part of the reflective electrode is dark because it hardly reflects the light except for the part where the light source is reflected, so that the display of the display device is very large. It gets hard.

Therefore, if a large number of fine uneven seeds are formed on the surface of the metal reflective electrode, and the light is scattered by the uneven seeds, the projection of the light source is suppressed, and a reflective electrode having good reflectance can be obtained.                         

However, when the arrangement of the uneven seed is repeatedly arranged at equal intervals, the light diffracted by the unevenness on the surface of the reflector interferes with each other, the strong light is reflected in a specific direction, or the specific wavelength interferes to strengthen each other, As a result, the reflective electrode is colored.

Therefore, if the irregular shape arrangement is made irregular, the interference of the diffracted light is suppressed and the reflected light is whitened, whereby a reflective electrode having good reflection characteristics can be obtained.

2 is a diagram illustrating an arrangement of uneven seeds of a unit pixel region in a Fibonacci array according to the related art. As shown in the figure, the uneven seed is irregularly arranged by a Fibonacci type arrangement. That is, the distance distribution between uneven | corrugated seeds or the height distribution of uneven | corrugated seed are arrange | positioned so that it may become a predetermined | prescribed gap.

The Fibonacci equation is (x, y) = [a√n cos (nb), a√n sin (nb)].

Where a is any positive real number, n is a positive integer, and b is a constant value of 137.5 °.

Thus, the Fibonacci array represents the position on the (x, y) coordinates by arbitrarily expanding the above equation.

In this case, after defining the region of the unit pixel 210 on the coordinates of the position of the uneven seed 230 to be disposed in the unit pixel 210, the position of the uneven seed 230 corresponding to the reflective region 220 is actually measured. The pixel design is switched.

FIG. 3 is a diagram illustrating an uneven seed defined as a unit pixel according to the related art. As shown in the drawing, the uneven seed 230 of the unit pixel 210 defined in the Fibonacci array is formed in the pixel region formed by the intersection of the gate line 310 and the data line 320. It is arranged at 220.

However, as the uneven seed 230 defined as the unit pixel 210 is disposed in the reflective region 220 of each unit pixel 210, a Fibonacci array defined by the unit pixel 210 is repeatedly arranged in each unit pixel 210. They are arranged and appear in a regular array throughout the screen.

Therefore, the regular arrangement is such that moirés in which diffracted light on the screen to be displayed interfere with each other, strong light is reflected in a specific direction, or specific wavelengths interfere with each other to enhance each other, or thereby the reflective electrode is colored. Moire) has a problem that occurs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of forming an uneven seed in a liquid crystal display device which can prevent moiré phenomenon by irregularly disposing uneven seed formed in the reflective region.

In order to achieve the above object, the method of forming the uneven seed of the liquid crystal display according to the present invention,

A substrate having each unit pixel region defined by crossing a gate line and a data line, wherein each unit pixel has a reflection region, and includes one uneven seed by grouping reflection regions of a predetermined number of unit pixels adjacent in the gate line direction. Its characteristics are that it forms as a basic unit of arrangement.

In addition, in order to achieve the above object, the method of forming the uneven seed of the liquid crystal display device according to the present invention,

A substrate having each unit pixel region defined by crossing two adjacent gate lines and a data line, wherein each unit pixel has a reflection region, and one reflection region of a predetermined number of unit pixels adjacent in the data line direction is bundled. Its characteristics are that it forms a basic unit of uneven seed placement.

In addition, in order to achieve the above object, the method of forming the uneven seed of the liquid crystal display device according to the present invention,

A substrate having each unit pixel region defined by crossing two adjacent gate lines and a data line, wherein each unit pixel has a reflecting region and reflects a predetermined number of unit pixels adjacent in the gate line direction and the data line direction. Its characteristics are that it forms the region as a basic unit of one uneven seed arrangement.

Here, in particular, the basic unit of the uneven seed arrangement is characterized in that the reflection areas of two or three unit pixels are formed in a bundle.

In particular, the basic unit of the uneven seed arrangement is characterized by forming two reflective regions of a total of four unit pixels as a basic unit by tying two in the gate line direction and two in the data line direction.

In particular, the basic unit of the uneven seed arrangement is characterized by forming three reflective regions of a total of six unit pixels as basic units by tying three in the gate line direction and two in the data line direction.

According to the present invention as described above, the moiré phenomenon can be prevented by irregularly disposing the uneven seed formed in the reflective region.

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

FIG. 4 is a diagram illustrating an arrangement of uneven seeds formed in the reflective region of each unit pixel of the liquid crystal display according to the first exemplary embodiment of the present invention. As shown in the drawing, in the substrate having each unit pixel region 440 defined by the gate line 410 and the data line 420 intersecting, each unit pixel 440 has a reflective region 430. In addition, the reflection areas 430 of the predetermined number of unit pixels 440 adjacent to the gate line 410 are bundled to form a basic unit of one uneven seed arrangement.

5A and 5B are views illustrating arrangement of uneven seeds of a unit pixel region in a Fibonacci array according to the present invention. As shown in the figure, the position of the uneven seed is irregularly arranged by a Fibonacci type arrangement. That is, the distance distribution between uneven | corrugated seeds or the height distribution of uneven | corrugated seed are arrange | positioned so that it may become a predetermined | prescribed gap.

The Fibonacci equation is (x, y) = [a√n cos (nb), a√n sin (nb)].

Where a is any positive real number, n is a positive integer, and b is a constant value of 137.5 °.

In more detail, the angle of 137.5 degrees is mathematically derived from a theory called Fibonacci sequence, and at this angle, it is possible to have a regular arrangement in which the spacing between adjacent seeds is substantially equal. Further, by arranging the distance from the center to be proportional to the square root of n, when the points are arranged in order from the center to the periphery, the areas occupied by the seeds on the plane coordinates can be made substantially the same, and adjacent seeds It is possible to make the arrangement with the space | interval nearly equal.

Thus, the Fibonacci array represents the position on the (x, y) coordinates by arbitrarily expanding the above equation.

At this time, the position of the uneven seeds to be disposed in the unit pixel is defined as one unit by a predetermined number of pixel regions on the coordinates, and then the positions of the uneven seeds corresponding to the reflective regions are switched on the actual pixel design.

In more detail, irregularities positioned irregularly by the Fibonacci array are defined in a predetermined number of pixel regions as one unit, and arranged in the entire panel.

As shown in FIG. 5A, the pixel region 440 in which R, G, and B are repeatedly formed is combined with two sub-pixels 440 such as RG, BR, or GB to form a basic unit of one Fibonacci region ( 430).

The two sub-pixels are bundled to define a defined Fibonacci region in the gate line direction 410. At this time, if the Fibonacci uneven seed region 430 disposed along the gate line 410 is arranged as RG, BR, or GB in the Nth gate line 410, in the (N-1) th gate line 410, GB Can be arranged in order of RG, BR.

Alternatively, as shown in FIG. 5B, the pixel region 440 in which R, G, and B are repeatedly formed may be defined as a basic unit by grouping three sub-pixels into one Fibonacci region with R-G-B.

In this case, as mentioned in FIG. 5A, the arrangement order of the gate lines 410 may be modified.

FIG. 6 is a diagram illustrating an arrangement of uneven seeds formed in the reflective region of each unit pixel of the reflective LCD according to the second exemplary embodiment of the present invention. As shown in the drawing, in a substrate having each unit pixel region 640 defined by crossing two adjacent gate lines 610 and data lines 620, each of the unit pixels 640 is a reflective region 630. ) And the reflection areas 630 of a predetermined number of unit pixels 640 adjacent to the data line 620 are bundled to form a basic unit of one uneven seed arrangement.

Here, the two adjacent gate lines 610 and the data line 620 cross each other to bundle the basic unit of the uneven seed arrangement in the direction of the data line 620.

In this case, a detailed description of the second embodiment of the present invention is similar to that described with reference to FIGS. 5A and 5B, and thus the detailed description thereof will be omitted.

7A and 7B illustrate arrangement of uneven seeds formed in the reflective region of each unit pixel of the reflective LCD according to the third embodiment of the present invention. As shown in the drawing, in a substrate having each unit pixel region 740 defined by crossing two adjacent gate lines 710 and data lines 720, each unit pixel 740 is a reflection region 730. ) And the reflection areas 730 of the predetermined number of unit pixels 740 adjacent in the gate line 710 direction and the data line 720 direction are bundled to form a basic unit of one uneven seed arrangement.

In this case, a detailed description of the third embodiment of the present invention is similar to that described with reference to FIGS. 5A and 5B, and thus the detailed description thereof will be omitted.

As shown in FIG. 7A, the basic unit of the uneven seed arrangement includes two reflective regions 730 of four unit pixels 740 by tying two in the direction of the gate line 710 and two in the direction of the data line 720. ) As the basic unit.

In addition, as shown in FIG. 7B, the basic unit of the uneven seed arrangement includes three reflective regions of six unit pixels 740 in the three directions in the direction of the gate line 710 and the two in the direction of the data line 720. 730 is formed as a basic unit.

In the above embodiments, the two or three unit pixels are bundled to form one basic unit, but this may be performed by tying a plurality of unit pixels to form one basic unit.

In the above embodiments, the transflective reflection region has been described. However, this may also be applied to the uneven seed arrangement of the reflective region of the reflective liquid crystal display.                     

Although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

As described above, the method of forming the uneven seed in the liquid crystal display according to the present invention can prevent the moiré phenomenon by irregularly disposing the uneven seed formed in the reflective region.

Claims (6)

A substrate having respective unit pixel regions defined by crossing gate lines and data lines, wherein each unit pixel has a reflecting region, and includes one uneven seed by grouping reflective regions of a predetermined number of unit pixels adjacent in the gate line direction. The uneven seed forming method of a liquid crystal display device formed by the basic unit of a batch. A substrate having each unit pixel region defined by crossing two adjacent gate lines and a data line, wherein each unit pixel has a reflection region, and one reflection region of a predetermined number of unit pixels adjacent in the data line direction is bundled. The uneven seed forming method of the liquid crystal display device, characterized in that formed in the basic unit of the uneven seed arrangement. A substrate having each unit pixel region defined by crossing two adjacent gate lines and a data line, wherein each unit pixel has a reflecting region and reflects a predetermined number of unit pixels adjacent in the gate line direction and the data line direction. A method of forming an uneven seed in a liquid crystal display device, wherein the regions are bundled to form a base unit of one uneven seed arrangement. The method according to any one of claims 1 to 3, The uneven seed forming method of the liquid crystal display device, wherein the basic unit of the uneven seed arrangement is formed by grouping reflective regions of two or three unit pixels. The method of claim 3, wherein The uneven seed forming method of the uneven seed may be formed by grouping two in the gate line direction and two in the data line direction to form reflective regions of a total of four unit pixels in the basic unit. The method of claim 3, wherein The uneven seed forming method of the uneven seed may be formed by grouping three in the gate line direction and two in the data line direction to form reflective regions of a total of six unit pixels in the basic unit.

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