CN105739194B

CN105739194B - Image display system

Info

Publication number: CN105739194B
Application number: CN201610184353.0A
Authority: CN
Inventors: 陈俊宇; 蔡明耀; 卢永信; 许绍武
Original assignee: Innolux Shenzhen Co Ltd; Innolux Display Corp
Current assignee: Innolux Shenzhen Co Ltd; Innolux Corp
Priority date: 2012-07-02
Filing date: 2012-07-02
Publication date: 2022-01-21
Anticipated expiration: 2032-07-02
Also published as: CN105739194A

Abstract

The invention relates to an image display system, which comprises a liquid crystal display panel. The liquid crystal display panel comprises an array substrate, an upper electrode and a lower electrode. The upper electrode is provided with a slit, wherein the slit comprises a slit first part and a slit second part, and the extending direction of the slit first part and the extending direction of the slit second part have a preset angle. The lower electrode is arranged between the array substrate and the upper electrode and is arranged corresponding to the slit of the upper electrode, the lower electrode comprises a first electrode part and a second electrode part, and the extending direction of the first electrode part and the extending direction of the second electrode part have a preset angle. Wherein the projection of a part of the edge of the lower electrode on the array substrate is in the projection of the edge of the slit on the array substrate.

Description

Image display system

The application is a divisional application of an invention patent application with an application date of 2012, 7/2 and a name of "image display system" and an application number of 201210223707.

Technical Field

The present invention relates to an image display system having a liquid crystal display panel, and more particularly to a liquid crystal display panel with improved upper and lower electrode structure design.

Background

In recent years, liquid crystal displays have been widely used In display elements of various products, wherein In-Plane Switching (IPS) liquid crystal displays and Fringe-Field Switching (FFS) liquid crystal displays belong to the wide viewing angle technology of In-Plane Switching (IPS) liquid crystal displays, and FFS liquid crystal displays are improved by improving electrodes In the IPS liquid crystal displays to improve light transmittance.

However, although these types of lcds can improve the viewing angle and increase the transmittance, the effect of the lcds is still quite different as the relative relationship between the top and bottom electrodes in the sub-pixels is different, and there are still many dark areas in the sub-pixels, which results in the decrease of the transmittance of the panel and the decrease of the display quality.

Disclosure of Invention

An image display system according to an embodiment of the present invention includes: a liquid crystal display panel, wherein the liquid crystal display panel has a plurality of pixels formed by regions where a plurality of gate lines and a plurality of data lines are alternately disposed on an array substrate, each of the plurality of pixels has a plurality of sub-pixels, and each of the plurality of sub-pixels includes: the upper electrode is provided with a slit, wherein the slit comprises a slit first part and a slit second part, and the extending direction of the slit first part and the extending direction of the slit second part have a first set angle; and a lower electrode disposed between the array substrate and the upper electrode and corresponding to the slit, wherein the lower electrode comprises a first electrode part and a second electrode part, the extending direction of the first electrode part and the extending direction of the second electrode part have a second predetermined angle, wherein the projections of the upper electrode and two of the gate lines on two sides of the lower electrode on the array substrate are at least partially overlapped, the extending direction of the slit first portion is the same as the extending direction of the electrode first portion, and the extending direction of the slit second portion is the same as the extending direction of the electrode second portion, wherein the projection of the partial outer edge of the lower electrode on the array substrate is positioned between the projections of the slits of the upper electrode on the array substrate.

An image display system according to an embodiment of the present invention includes: a liquid crystal display panel, wherein the liquid crystal display panel has a plurality of pixels formed by regions where a plurality of gate lines and a plurality of data lines are alternately disposed on an array substrate, each of the plurality of pixels has a plurality of sub-pixels, and each of the plurality of sub-pixels includes: the upper electrode is provided with a slit, wherein the slit comprises a slit first part and a slit second part, and the extending direction of the slit first part and the extending direction of the slit second part have a first set angle; and a lower electrode disposed between the array substrate and the upper electrode and corresponding to the slit, wherein the lower electrode includes a first electrode portion and a second electrode portion, an extending direction of the first electrode portion and an extending direction of the second electrode portion have a second predetermined angle, a projection of the lower electrode and the slit on the array substrate partially overlap and partially do not overlap, the extending direction of the first slit portion is the same as the extending direction of the first electrode portion, the extending direction of the second slit portion is the same as the extending direction of the second electrode portion, and when the first slit portion is turned toward a data line of the plurality of data lines, the first electrode portion is turned toward the data line of the plurality of data lines, or when the slit first part is turned away from the data line in the plurality of data lines, the electrode first part is turned away from the data line in the plurality of data lines, wherein the projection of the partial outer edge of the lower electrode on the array substrate is positioned between the projection of the slit of the upper electrode on the array substrate.

Drawings

A more complete understanding of the present disclosure thereof may be acquired by referring to the following detailed description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a top view of a sub-pixel of a liquid crystal display panel showing an embodiment;

fig. 2A is a top view showing a sub-pixel of the liquid crystal display panel 100 according to an embodiment of the present invention;

FIG. 2B is a cross-sectional view taken along section line A-A' of FIG. 2A;

FIG. 2C is a schematic diagram showing slits 112 of sub-pixels of the LCD panel 100 according to the embodiment of the present invention;

FIG. 2D is a diagram illustrating slits 114 of sub-pixels of the LCD panel 100 according to an embodiment of the present invention;

FIG. 2E is a schematic diagram showing the bottom electrodes 120 of the sub-pixels of the LCD panel 100 according to the embodiment of the invention;

fig. 2F is a top view showing a complete pixel of the liquid crystal display panel 100 according to the embodiment of the present invention;

fig. 3 is a top view showing a sub-pixel of the liquid crystal display panel 100 according to another embodiment of the present invention;

fig. 4 is a top view showing a sub-pixel of the liquid crystal display panel 100 according to another embodiment of the present invention;

fig. 5 is a schematic configuration diagram of an image display system 200 including a liquid crystal display panel according to the present invention.

[ description of main element symbols ]

100-a liquid crystal display panel;

110. 110A, 110B-upper electrode;

112. 114, 112A, 114A, 112B, 114B-slits;

112-1, 112-2, 112-3, 114-1, 114-2, 114-3 to the slit portion;

120. 120A, 120B-lower electrode;

120-1, 120-2, 120-3 to the electrode part;

200-image display system;

210-a liquid crystal display;

A. a' -a section line;

B. c-area;

DL to data line;

GL-gate line;

PLN-array substrate;

PV-dielectric layer.

Detailed Description

The following description shows a number of embodiments that can be achieved by the present invention. The description is not intended to limit the scope of the invention in any way. The scope of the invention is best defined in the appended claims.

Fig. 1 is a top view showing a sub-pixel of a liquid crystal display panel. In fig. 1, a sub-pixel is defined by two data lines DL extending along a vertical direction and two gate lines GL extending along a horizontal direction, and includes the data lines DL, the gate lines GL, an upper electrode 110, and a lower electrode 120, wherein the upper electrode 110 and the lower electrode 120 are transparent electrodes formed by Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO). In the embodiment of FIG. 1, the upper electrode 110 in the sub-pixel includes

slits

112 and 114, wherein the slit 112 is divided into three portions 112-1, 112-2 and 112-3 according to the intersection where the extending direction of the slit 112 changes, the slit 114 is also divided into three portions 114-1, 114-2 and 114-3, and the lower electrode 120 is disposed below the

slits

112 and 114 in a substantially rectangular shape. However, in the electrode structure design, the pitch between the two end turning regions of the upper electrode 110 and the lower electrode 120 is increased, and the generated electric field is not uniformly distributed, so that the turning regions a and B of the slit portion 112-1 and the slit portion 114-3 generate large dark regions, and thus the display resolution of the lcd panel 100 is poor and the transmittance is low. It should be noted that a dielectric layer is still provided between the upper electrode 110 and the lower electrode 120 for electrically separating the upper electrode 110 and the lower electrode 120, and for clarity of the drawings, it is not shown in the top view of fig. 1, and the functions and operation modes of the components can be understood by those skilled in the art, and are not described in detail herein.

In order to reduce the dark area generated at the corner of the conventional sub-pixel, the invention reduces the dark area at the corner of each sub-pixel in the liquid crystal display by improving the structure design of the lower electrode, thereby increasing the display quality and the transmittance of the display. The lower electrode structure design of the invention can be applied to the liquid crystal display of wide viewing angle technology, such as IPS or FFS liquid crystal display.

Fig. 2A is a top view illustrating a sub-pixel of the liquid crystal display panel 100 according to an embodiment of the present invention, and fig. 2B is a cross-sectional view taken along a section line a-a' of fig. 2A. The lcd panel 100 includes an array substrate PLN, data lines DL, gate lines GL, an upper electrode 110, a dielectric layer PV, and a lower electrode 120, wherein the upper electrode 110 and the lower electrode 120 are transparent electrodes formed of Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), the upper electrode 110 is used as a ground electrode for coupling to a ground voltage, and the lower electrode is used as a pixel electrode for coupling to a pixel voltage. In order to make the correspondence relationship between the elements in the embodiments clear, the same elements in the embodiments are denoted by the same reference numerals. Referring to fig. 2A, the sub-pixels of the liquid crystal display panel 100 are defined by two data lines DL extending in a vertical direction and two gate lines GL extending in a horizontal direction. Referring to fig. 2B, the array substrate PLN includes a data line DL, the lower electrode 120 is disposed between the array substrate PLN and the upper electrode 110, and a dielectric layer PV is further included between the upper electrode 110 and the lower electrode 120 for electrically separating the upper electrode 110 from the lower electrode 120.

In the embodiment of FIG. 2A, the upper electrode 110 in the sub-pixel includes

slits

112 and 114, wherein the slit 112 can be divided into three portions 112-1, 112-2 and 112-3 according to the intersection where the extending direction of the slit varies, as shown in FIG. 2C, and the slit 114 can be equally divided into three portions 114-1, 114-2 and 114-3, as shown in FIG. 2D. The bottom electrode 120 in the sub-pixel is disposed corresponding to the slit 112 and the slit 114, for example, the bottom electrode 120 may be divided into three portions 120-1, 120-2 and 120-3 at the intersection where the extending direction changes, as shown in fig. 2E, the three portions 112-1, 112-2 and 112-3 corresponding to the slit 112 and the three portions 114-1, 114-2 and 114-3 corresponding to the slit 114, respectively, the electrode portion 120-1 and the slit portions 112-1 and 114-1 extend in the same direction, the electrode portion 120-2 and the slit portions 112-2 and 114-2 extend in the same direction, and the electrode portion 120-3 and the slit portions 112-3 and 114-3 extend in the same direction. Comparing to the two ends of the

slits

112 and 114 in fig. 1, it is noted that the distances between the upper electrode 110 and the lower electrode 120 are substantially the same in each region of the

slits

112 and 114, so that the dark regions in the original turning regions (such as the region B and the region C in fig. 1) can be reduced, and the display quality and the transmittance of the lcd panel 100 can be improved. In some embodiments, the angle between the extending direction of the slit portion 112-1 and the extending direction of the slit portion 112-2 is between 30 degrees and 45 degrees, the angle between the extending direction of the slit portion 112-2 and the extending direction of the slit portion 112-3 is between 30 degrees and 45 degrees, and the turning angles of the corresponding slit 114 and the lower electrode 120 are the same.

In addition, as shown in the top view of fig. 2A, the left side portion of the lower electrode 120 partially overlaps the slit 112, and the right side portion of the lower electrode 120 partially overlaps the slit 114, in other words, a portion of the right side edge of the lower electrode 120 is projected on the array substrate PLN within the projection of the edge of the slit 112 on the array substrate PLN, and a portion of the left side edge of the lower electrode 120 is projected on the array substrate PLN within the projection of the edge of the slit 112 on the array substrate PLN. On the other hand, from the perspective of the cross-sectional view of fig. 2B, the projection of the edge of the lower electrode 120 on the array substrate PLN is located between the projections of the slit of the upper electrode 110 on the array substrate PLN, i.e. the projections of the upper electrode 110 and the lower electrode 120 on the array substrate PLN have a distance d. In some embodiments, the spacing d may be 2.0 μm, and the light transmittance may be effectively improved at this spacing. Fig. 2F is a top view of a whole pixel of the lcd panel 100 according to the embodiment of the invention, wherein the pixel is composed of three sub-pixels as in the embodiment of fig. 2A, and each sub-pixel corresponds to the output of light with different colors.

Although an embodiment according to the present invention is shown in FIG. 2A, the present invention is not limited thereto. For example, in FIG. 2A, portions 112-1 and 112-3 of slit 112 have the same extension direction, portions 114-1 and 114-3 of slit 114 have the same extension direction, and portions 120-1 and 120-3 of bottom electrode 120 have the same extension direction. However, in some embodiments of the present invention, portions 112-1 and 112-3 of slit 112 may have different extending directions, portions 114-1 and 114-3 of slit 114 may have different extending directions, and portions 120-1 and 120-3 of bottom electrode 120 may have different extending directions, and in this embodiment, portions 112-1 and 114-1 of slit 112, portion 114-1 of slit 114 and portion 120-1 of bottom electrode 120 still have the same extending directions, and portions 112-3 and 114-3 of slit 112 and portion 120-3 of slit 114 still have the same extending directions, so as to maintain the distances between top electrode 110 and bottom electrode 120 in the regions of

slits

112 and 114 substantially the same.

In addition, in the above embodiments, the

slits

112 and 114 and the lower electrode 120 are divided into three parts, however, in other embodiments of the present invention, only the slit of the upper electrode and the lower electrode are divided into two parts, or the slit of the upper electrode and the lower electrode are divided into four parts as shown in fig. 3.

Although only some of the sub-pixels of the lcd panel 100 are illustrated in the above embodiments, it should be understood that each sub-pixel of the lcd panel 100 may have the improved structure of the slits and the electrodes in the above embodiments. In addition, in some embodiments of the present invention, the extending directions of the slits of the sub-pixels may be different, as shown in fig. 4, the extending directions of the slits 112A and 114A of the upper electrode 110A and the

slits

112B and 114B of the upper electrode 110B are different, and the extending directions of the lower electrode 120A and the lower electrode 120B are different because the lower electrode 120A is disposed corresponding to the slits 112A and 114A and the lower electrode 120B is disposed corresponding to the

slits

112B and 114B.

Although the above embodiments are described with reference to the IPS or FFS type liquid crystal display, the invention is not limited thereto, and the invention can be applied to other types of liquid crystal displays. In addition, although the above embodiments refer to the same extending direction of the slit and the corresponding portion of the bottom electrode, it is not limited thereto, and in some embodiments, when the turning point of the change of the extending direction of the bottom electrode is disposed corresponding to the turning point of the change of the extending direction of the slit, the extending direction of each portion of the slit and the extending direction of the corresponding portion of the bottom electrode may have a small amount of angular deviation.

Referring to fig. 5, a schematic configuration diagram of an image display system 200 including a liquid crystal display panel according to the present invention is shown, wherein the image display system includes a liquid crystal display 210 having the liquid crystal display panel 100 according to the present invention, and a pair of upper and lower polarizing plates sandwiching the liquid crystal display panel 100, and a backlight device disposed below the lower polarizing plate, the liquid crystal display 210 may be a part of an electronic device. Generally, the image display system 200 includes a liquid crystal display 210 and an input unit 220, wherein the input unit 220 is coupled to the liquid crystal display 210 and transmits a signal to the liquid crystal display to enable the liquid crystal display to display an image. The image display system 200 may be a mobile phone, a digital camera, a Personal Digital Assistant (PDA), a notebook computer, a desktop computer, a television, a car monitor, or a portable DVD player.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the above disclosure is not intended to limit the embodiments of the invention. On the contrary, it is intended to cover various modifications and similar arrangements (as would be apparent to those skilled in the art). Furthermore, the appended claims are to be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.

Claims

1. An image display system, comprising:

a liquid crystal display panel, wherein the liquid crystal display panel has a plurality of pixels formed by regions where a plurality of gate lines and a plurality of data lines are alternately disposed on an array substrate, each of the plurality of pixels has a plurality of sub-pixels, and each of the plurality of sub-pixels includes:

the upper electrode is provided with a slit, wherein the slit comprises a slit first part and a slit second part, and the extending direction of the slit first part and the extending direction of the slit second part have a first set angle; and

a lower electrode disposed between the array substrate and the upper electrode and corresponding to the slit, wherein the lower electrode includes a first electrode portion and a second electrode portion, an extending direction of the first electrode portion and an extending direction of the second electrode portion have a second predetermined angle,

wherein the projections of the upper electrode and two gate lines of the plurality of gate lines on both sides of the lower electrode on the array substrate at least partially overlap, the extending direction of the first part of the slit is the same as the extending direction of the first part of the electrode, and the extending direction of the second part of the slit is the same as the extending direction of the second part of the electrode,

wherein the projection of the partial outer edge of the lower electrode on the array substrate is positioned between the projections of the slits of the upper electrode on the array substrate.

2. The image display system of claim 1, wherein the top electrode overlaps with projections of two of the data lines on the array substrate at two sides of the bottom electrode.

3. The image display system of claim 1, wherein the lower electrode at least partially overlaps a projection of one of two gate lines of the plurality of gate lines on both sides of the lower electrode, which is not electrically connected to the lower electrode, onto the array substrate.

4. The image display system of claim 1, wherein the bottom electrode comprises a third portion of an electrode extending at a third predetermined angle to the extending direction of the second portion of the electrode,

the slit includes a slit third portion, an extending direction of the slit third portion and the extending direction of the slit second portion have a fourth predetermined angle, the extending direction of the electrode third portion and the extending direction of the slit third portion are the same,

the first portion of the electrode is turned toward a first side with respect to the second portion of the electrode, and the third portion of the electrode is turned toward a second side opposite to the first side with respect to the second portion of the electrode.

5. An image display system, comprising:

wherein the projection of the lower electrode and the slit on the array substrate are partially overlapped and partially not overlapped, the extending direction of the first part of the slit is the same as the extending direction of the first part of the electrode,

the extending direction of the slit second portion is the same as the extending direction of the electrode second portion,

wherein when the first slit portion is turned to be close to one of the data lines, the first electrode portion is turned to be close to the one of the data lines, or

When the slit first part is turned away from the data line in the plurality of data lines, the electrode first part is turned away from the data line in the plurality of data lines, wherein the projection of the partial outer edge of the lower electrode on the array substrate is positioned between the projection of the slit of the upper electrode on the array substrate.

6. The image display system of claim 5, wherein the top electrode overlaps with projections of two of the data lines on the array substrate at two sides of the bottom electrode.

7. The image display system of claim 5, wherein the lower electrode at least partially overlaps a projection of one of two gate lines of the plurality of gate lines on both sides of the lower electrode, which is not electrically connected to the lower electrode, onto the array substrate.

8. The image display system of claim 5, wherein the bottom electrode further comprises a third portion of an electrode extending at a third predetermined angle to the extending direction of the second portion of the electrode,

the slit further comprises a slit third portion having an extending direction at a fourth predetermined angle to the extending direction of the slit second portion,

the extending direction of the electrode third portion and the extending direction of the slit third portion are the same,

the electrode first portion is turned towards the data line of the plurality of data lines, the electrode third portion is turned towards the data line of the plurality of data lines,

when the first electrode portion is turned away from the data line of the plurality of data lines, the third electrode portion is turned toward the data line of the plurality of data lines.