TW201314334A - Unit pixel of liquid-crystal display - Google Patents

Abstract

An unit pixel of liquid-crystal display is disclosed. The unit pixel at least comprises a bottom electrode, an isolating layer and a top electrode. The top electrode comprises plural unit electrodes. A slit is located between two adjacent unit electrodes. The outer side edge of the slit closest to the outside of the top electrode is aligned to the outer side edge of the bottom electrode longitudinally. Alternatively, there is a distance between the outer side edge of the slit closest to the outside of the top electrode and the outer side edge of the bottom electrode. The distance is equal to or small than a half width of the slit. Since the unit electrode closest to the outer of the top electrode and the bottom electrode are not overlapped to each other in the present invention, the cross-talk can be avoided. The unit pixel of the present invention not only promotes the optical efficiency but also prevents from the cross-talk.

Description

Liquid crystal display unit pixel

The invention relates to a unit pixel of a liquid crystal display, in particular to a unit pixel of a liquid crystal display which improves the light-emitting efficiency and avoids the occurrence of crosstalk.

First, please refer to FIG. 1 , which is a schematic diagram showing a unit pixel of a liquid crystal display in a conventional boundary electric field switching mode. The unit pixel 1 of the liquid crystal display of the existing Fringe Field Switching (FFS) includes at least the lower substrate 11, the lower electrode 12, the insulating layer 13, the upper electrode 14, the liquid crystal arrangement layer 15, and the upper substrate 16. The lower electrode 12 is provided on the lower substrate 11. The insulating layer 13 is provided on the lower electrode 12. The upper electrode 14 is disposed over the insulating layer 13 such that the insulating layer 13 is located between the lower electrode 12 and the upper electrode 14. The liquid crystal arrangement layer 15 is provided on the upper electrode 14. The upper substrate 16 is provided on the liquid crystal arrangement layer 15. The upper electrode 14 is composed of a plurality of unit electrodes 141. The adjacent unit electrodes 141 have an opening 142 (Slit) therebetween. On the other hand, the outer side edge 121 of the electrode 12 and the outer side edge 1411 of the outermost side of the upper electrode 14 are vertically aligned or nearly longitudinally aligned with each other.

Please refer to FIG. 2 again, which is a schematic diagram showing the optical simulation results of the unit pixel of the liquid crystal display in the existing boundary electric field switching mode. According to the optical analog simulation of the unit pixel structure described above, it can be known that the unit pixel structure has high light transmittance, which further improves the light extraction efficiency of the unit pixel. However, although such a unit pixel structure can improve the light extraction efficiency of the unit pixel, the unit electrode between the outermost outer side and the lower electrode 12 overlaps vertically, thereby causing a cross-talk phenomenon. The foregoing is a technical subject still to be solved.

In view of various problems of the prior art, the inventors have proposed a unit pixel of a liquid crystal display based on years of research and development and many practical experiences, as an implementation method and basis for improving the above disadvantages.

It is an object of the present invention to provide a unit pixel of a liquid crystal display in which the outer side edge of the lower electrode and the outer side edge of the outermost side of the upper electrode are longitudinally aligned with each other.

Another object of the present invention is to provide a liquid crystal display unit having a distance from the outer side edge of the lower electrode and the outer side edge of the outermost side of the upper electrode, which is equal to or smaller than one-half the width of the opening. Picture.

It is still another object of the present invention to provide a unit pixel of a liquid crystal display which not only enhances the light extraction efficiency but also avoids the occurrence of crosstalk.

According to the above object of the present invention, the present invention provides a unit pixel of a liquid crystal display comprising at least a lower substrate, a lower electrode, an insulating layer, an upper electrode, a liquid crystal arrangement layer, and an upper substrate. The lower electrode is disposed on the lower substrate, and the insulating layer is disposed on the lower electrode such that the insulating layer is located between the lower electrode and the upper electrode, the upper electrode is disposed on the insulating layer, and the liquid crystal disposed layer is disposed on the upper electrode. The lower electrode has an outer edge, the upper electrode includes a plurality of unit electrodes, and an adjacent unit electrode has an opening therebetween, and the outer side edge of the uppermost electrode of the upper electrode and the outer side edge of the lower electrode are longitudinally aligned with each other. Or the outer side edge of the opening adjacent to the outer side of the upper electrode and the outer side edge of the lower electrode have a distance from each other which is equal to or smaller than one-half of the width of the opening.

According to the structural design of the unit pixel of the present invention, the unit pixel of the present invention has high light transmittance, which further improves the light extraction efficiency. Moreover, since there is no vertical overlap between the unit electrode and the lower electrode of the nearest neighboring unit pixel of the present invention, crosstalk is avoided. That is, the unit pixel of the liquid crystal display of the present invention not only improves the light extraction efficiency but also avoids the occurrence of crosstalk.

For a better understanding and understanding of the technical features and the efficacies of the present invention, the preferred embodiments and the detailed description are as follows.

Hereinafter, the unit pixels of the liquid crystal display of the present invention will be described with reference to the related drawings. For the sake of easy understanding, the same components in the following embodiments are denoted by the same reference numerals.

First, please refer to FIG. 3, which is a schematic view showing a first preferred embodiment of a unit pixel of the liquid crystal display of the present invention. The unit pixel 2 of the liquid crystal display of the present invention includes at least a lower substrate 21, a lower electrode 22, an insulating layer 23, an upper electrode 24, a liquid crystal arrangement layer 25, and an upper substrate 26 from bottom to top. The lower electrode 22 is provided on the lower substrate 21. The insulating layer 23 is provided on the lower electrode 22. The material of the insulating layer 23 is made of a material such as nitride or oxide, and the nitride is, for example, tantalum nitride or an oxide such as cerium oxide. The upper electrode 24 is disposed over the insulating layer 23 such that the insulating layer 23 is located between the lower electrode 22 and the upper electrode 24. The liquid crystal arrangement layer 25 is provided on the upper electrode 24. The upper substrate 26 is provided on the liquid crystal arrangement layer 25. The aforementioned upper electrode 24 includes a plurality of unit electrodes 241. An adjacent opening (Slit) 242 is provided between the adjacent unit electrodes 241. The widths W of the openings 242 are equal or unequal. In the present embodiment, only the width W of each of the openings 242 is equal, but is not limited by way of example. The outer side edge 221 of the electrode 22 below the unit pixel 2 and the outer side edge 242 of the outermost side of the upper electrode 24 are longitudinally aligned with each other.

Please refer to FIG. 4 again, which is a schematic diagram showing the optical simulation results of the first preferred embodiment of the unit pixel of the liquid crystal display of the present invention. According to the optical simulation of the structure of the first preferred embodiment of the present invention, it is known that the structure of the first preferred embodiment of the present invention has a high light transmittance, thereby improving the light extraction efficiency of the unit pixel 2.

Please refer to FIG. 5 again, which is a schematic diagram showing a second preferred embodiment of the unit pixel of the liquid crystal display of the present invention. The unit pixel 2 of the liquid crystal display of the present invention includes at least a lower substrate 21, a lower electrode 22, an insulating layer 23, an upper electrode 24, a liquid crystal arrangement layer 25, and an upper substrate 26 from bottom to top. The difference from the foregoing first preferred embodiment is that the outer side edge 221 of the lower surface of the electrode 22 of the unit pixel 2 and the outer side edge 242 of the outermost side of the upper electrode 24 have a distance A from each other, and the distance A is about Less than one-half of the width W of the opening 242. In the present embodiment, the distance A is, for example, about one quarter of the width W of the opening 242.

Please refer to FIG. 6 again, which is a schematic diagram showing optical simulation results of a second preferred embodiment of the unit pixel of the liquid crystal display of the present invention. According to the optical simulation of the structure of the second preferred embodiment of the present invention, it can be seen that the structure of the second preferred embodiment of the present invention also has high light transmittance, thereby improving the light extraction efficiency of the unit pixel 2.

Please refer to FIG. 7 again, which is a schematic diagram showing a third preferred embodiment of the unit pixel of the liquid crystal display of the present invention. The unit pixel 2 of the liquid crystal display of the present invention includes at least a lower substrate 21, a lower electrode 22, an insulating layer 23, an upper electrode 24, a liquid crystal arrangement layer 25, and an upper substrate 26 from bottom to top. The difference from the foregoing first preferred embodiment or the second preferred embodiment is that the outer side edge 221 of the lower surface of the electrode 22 of the unit pixel 2 and the outer edge 242 of the outermost side of the upper electrode 24 have the outer side edges 2421 of each other. The distance B is about one-half of the width W of the opening 242.

Please refer to FIG. 8 again, which is a schematic diagram showing optical simulation results of a third preferred embodiment of the unit pixel of the liquid crystal display of the present invention. According to the optical simulation of the structure of the third preferred embodiment of the present invention, it is understood that the structure of the third preferred embodiment of the present invention also has high light transmittance, thereby improving the light extraction efficiency of the unit pixel 2.

It should be further noted that the unit pixel 2 of the liquid crystal display of the present invention is particularly suitable for a boundary electric field switching type liquid crystal display, which can be easily understood by those skilled in the art, and therefore will not be described again.

It should be further noted that the polarizer is further disposed on the substrate 26 above the unit pixel 2 of the liquid crystal display of the present invention, and another polarizer and a backlight module are disposed under the lower substrate 21, however, the present invention is well known. Relevant personnel in the technical field can easily understand, and therefore will not be described here.

In summary, the unit pixel of the liquid crystal display of the present invention has at least the following advantages: the outer side edge of the electrode under the unit pixel of the liquid crystal display of the present invention and the outer side edge of the uppermost electrode of the upper electrode are longitudinally opposite to each other. Alignment; or the outer side edge of the electrode outside the unit pixel and the outermost side of the upper electrode have a distance from each other, the distance being about equal to or less than one-half of the width of the opening. According to the unit pixel of the present invention, it can be known that the unit pixel of the present invention has high light transmittance, and the light extraction efficiency is further improved. Moreover, since there is no vertical overlap between the unit electrode and the lower electrode of the nearest neighboring unit pixel of the present invention, crosstalk is avoided. The unit pixel of the liquid crystal display of the invention not only improves the light extraction efficiency but also avoids the occurrence of crosstalk.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1. . . Unit pixel

11. . . Lower substrate

12. . . Lower electrode

121. . . Outer edge

13. . . Insulation

14. . . Upper electrode

141. . . Unit electrode

1411. . . Outer edge

142. . . Opening

15. . . Liquid crystal configuration layer

16. . . Upper substrate

2. . . Unit pixel

twenty one. . . Lower substrate

twenty two. . . Lower electrode

221. . . Outer edge

twenty three. . . Insulation

twenty four. . . Upper electrode

241. . . Unit electrode

242. . . Opening

2421. . . Outer edge

25. . . Liquid crystal configuration layer

26. . . Upper substrate

W. . . width

A. . . distance

B. . . distance

Figure 1 is a schematic diagram of a unit pixel of a liquid crystal display of a conventional boundary electric field switching mode;

Figure 2 is a schematic diagram showing optical simulation results of a unit pixel of a liquid crystal display in a conventional boundary electric field switching mode;

3 is a schematic view showing a first preferred embodiment of a unit pixel of a liquid crystal display of the present invention;

4 is a schematic diagram showing optical simulation results of a first preferred embodiment of a unit pixel of a liquid crystal display of the present invention;

Figure 5 is a schematic view showing a second preferred embodiment of the unit pixel of the liquid crystal display of the present invention;

6 is a schematic diagram showing optical simulation results of a second preferred embodiment of a unit pixel of a liquid crystal display of the present invention;

Figure 7 is a schematic view showing a third preferred embodiment of the unit pixel of the liquid crystal display of the present invention;

Fig. 8 is a view showing the optical simulation result of the third preferred embodiment of the unit pixel of the liquid crystal display of the present invention.

2. . . Unit pixel

twenty one. . . Lower substrate

twenty two. . . Lower electrode

221. . . Outer edge

twenty three. . . Insulation

twenty four. . . Upper electrode

241. . . Unit electrode

242. . . Opening

2421. . . Outer edge

25. . . Liquid crystal configuration layer

26. . . Upper substrate

W. . . width

Claims (10)

A unit pixel of a liquid crystal display, comprising: a lower electrode, the lower electrode is disposed on the lower substrate, the lower electrode has an outer edge; an insulating layer, the insulating layer is disposed on the lower electrode, such that An insulating layer is disposed between the lower electrode and the upper electrode; an upper electrode is disposed on the insulating layer, the upper electrode includes a plurality of unit electrodes, and an adjacent one of the unit electrodes has an opening therebetween One outer edge of the opening adjacent to the outer side of the upper electrode and the outer edge of the lower electrode are longitudinally aligned with each other; and a liquid crystal arrangement layer disposed on the upper electrode. The unit pixel of the liquid crystal display of claim 1, further comprising an upper substrate and a lower substrate, wherein the lower electrode is disposed on the lower substrate, and the upper substrate is disposed on the liquid crystal arrangement layer. The unit pixel of the liquid crystal display according to claim 1, wherein one of the openings is equal in width. The unit pixel of the liquid crystal display according to claim 1, wherein one of the openings is unequal in width. The unit pixel of the liquid crystal display according to claim 1, wherein the insulating layer is made of a nitride or an oxide. A unit pixel of a liquid crystal display, comprising: a lower electrode, the lower electrode is disposed on the lower substrate, the lower electrode has an outer edge; an insulating layer, the insulating layer is disposed on the lower electrode, such that An insulating layer is disposed between the lower electrode and the upper electrode; an upper electrode is disposed on the insulating layer, the upper electrode includes a plurality of unit electrodes, and an adjacent one of the unit electrodes has an opening therebetween One outer edge of the opening adjacent to the outer side of the upper electrode and the outer edge of the lower electrode have a distance from each other, the distance being equal to or less than one-half the width of one of the openings; and a liquid crystal arrangement layer, The liquid crystal arrangement layer is disposed on the upper electrode. The unit pixel of the liquid crystal display of claim 6, further comprising an upper substrate and a lower substrate, wherein the lower electrode is disposed on the lower substrate, and the upper substrate is disposed on the liquid crystal arrangement layer. The unit pixel of the liquid crystal display according to claim 6, wherein the width of each of the openings is equal. The unit pixel of the liquid crystal display of claim 6, wherein the width of each of the openings is unequal. The unit pixel of the liquid crystal display according to claim 6, wherein the insulating layer is made of a nitride or an oxide.