TW594185B - Liquid crystal display panel - Google Patents

Abstract

A liquid crystal display panel includes a first substrate, a second substrate opposite to the first substrate, a plurality of pixels arranged in a matrix and positioned between the first substrate and the second substrate, and a plurality of electric-field coupling devices positioned on the second substrate. The electric field coupling devices are respectively corresponding to the pixels for reducing light leakage of each pixel.

Description

594185 V. Description of the invention d) ^ [Technical Field] The present invention relates to a liquid crystal display which is the inverse of fringe effect / day special ^ 疋 a kind of display panel (LC〇s) which can reduce the tempo of the sun. ) [Previous technology] As the LCD silicon display panel (H uid ς LCOS) star right 丨 Guibengu ▲ by 77.1 on slllcon, Xiaotian Λ, Λ degree and high resolution and other technical advantages, also has, private Early time, low cost, and small size, so the LCD silicon alpha panel is mainly used in high-definition televisions (High

Definition Television) and multimedia projectors. " Please refer to FIG. 1 and FIG. 2. FIG. 1 is a top view of a conventional liquid crystal silicon display panel, and FIG. 2 is a schematic cross-sectional view of the liquid crystal display panel shown in FIG. 1 along a tangent line 2-2 '. . As shown in FIGS. 1 and 2, the liquid crystal silicon display panel 10 includes a glass substrate 12, a semiconductor wafer 14 parallel to and opposite to the glass substrate 12, and a plurality of pixels 16 disposed on the glass substrate. 1 2 and the semiconductor wafer 1 4. Each pixel 16 includes a common electrode 18 provided on the glass substrate 12, a pixel electrode 20 provided on the semiconductor wafer 14, and a liquid crystal molecular layer 24 provided on the common electrode 18 and Day element electrode between 20. In addition, each pixel 16 further includes an alignment film 2 2 a formed between the common electrode 18 and the liquid crystal molecular layer 24, and an alignment film 594185. 5. Description of the invention (2) '^ ------- -2 2 b is provided between each pixel electrode 20 and the liquid crystal molecular layer 24, and the alignment films 22 a and 22 b are both used to adjust the direction of the liquid crystal molecules in the liquid crystal sub-layer 24. In addition, since the liquid crystal silicon display panel is generally a reflective liquid crystal display panel, each day element electrode 20 is usually composed of a metal material having light diffusivity, such as aluminum, and the common electrode 18 is composed of Indium tin oxide (ITO) or hafnium zinc oxide (I2Q) is a transparent conductive layer. 4 As shown in FIG. 2 ′, the semiconductor wafer 1 4 includes a silicon substrate 32 and a plurality of thin-film transistors 3 4 provided on the silicon substrate 32, which are used as switching elements of each pixel 16. In addition, the semiconductor wafer 4 is separately packaged; the metal layer 36, the metal layer 38, and the contact plug 40, wherein each contact ^ 40 is used to electrically connect the metal layers 36 and 38 to each pixel electrode 2 〇 and each ^ film transistor 32, and the metal layers 36 and 38 respectively include a plurality of scanning lines and data lines, which are used to transmit the ^ 1 trace signal and The image signal is sent to each thin film transistor 34. On the other hand, the half-scan body wafer 1 4 usually also includes a plurality of light-shielding layers 3 0, which are arranged between the $ 20 conductive electrodes of each day to prevent light from entering the semiconductor wafer i 4 and the film transistor 3 The operation of 4. Set the Tao electrode element pole iiyml JL / O / Jiatong all elements to draw the road, straight each electric time vertical and 8 moving direction 1 drive square pole ο 2 field electricity 10 pole electricity board electricity is born on the same plane Indicate that the daytime production position shows each meeting and the crystals are connected to each other 8 ^ 1 Here, the crystal 2 field liquid electrode electricity should be energized directly, and the totality is stated in the picture, each of the 2 general information and the pole 8 a voltage 1 electricity 594185 five 2. Description of the invention (3) The liquid crystal molecules between 3 and 20 will generate the corresponding deflection according to the vertical electric field to produce the proper light transmittance. However, when two adjacent pixel electrodes 20 are respectively applied with different voltages, a lateral electric field (1 at era 1 e 1 ec tr icfie 1 d) is generated between the adjacent two pixel electrodes 20, Therefore, the liquid crystal molecules located between two adjacent pixel electrodes 20 will be affected by the δH vertical electric field and the lateral electric field at the same time, and it will not be able to produce inexpensive deflection and light transmittance. This is the so-called Stripe effect (fr 丨 ng = effect). Especially when each pixel 16 wants to display black, the occurrence of such a streak effect will cause a light leakage phenomenon between two adjacent pixel electrodes 20 / thereby reducing the contrast effect of the liquid crystal silicon display panel 10.

In addition, when the liquid crystal molecular layer 24 is composed of twisted nematic liquid crystal molecules (TNLC), the alignment directions of the alignment films 20 a and 20 b (rubb i ng dir ec ti on) are also One of the reasons for the streak effect. As shown in FIG. 1, for a TNLC-type liquid crystal display panel 10, the alignment direction 2 6 of the alignment film 20 a is generally approximately perpendicular to the alignment direction 28 of the alignment film 20 b, and the alignment film 20 2 Under the influence of the orientation direction of Ob, the region 16a in each day element 16 will often have a serious streak effect, so that each region 16a becomes a light leakage region of each pixel 16 ', thereby reducing the liquid crystal display panel. Display quality of 10. Therefore, how to suppress the streak effect to reduce light leakage is a key problem currently faced by the liquid crystal display panel 10. 【content】

594185 V. Description of the invention (4) Summary of the invention The object of the present invention is to provide a liquid crystal display panel to solve the aforementioned problems. According to the purpose of the present invention, a preferred embodiment of the present invention is to provide a liquid crystal display panel, which includes a first substrate, a second substrate opposite to the first substrate, a plurality of which are arranged in a matrix and disposed on the first substrate. A day element (pi xe 1) between a substrate and the second substrate, and a plurality of electric field coupling elements disposed on the second substrate and corresponding to the pixels, respectively, are used to reduce each of the day elements. Light leakage. The elementary light in the shadow area shows that the light effect of the crystal field leaks the effect of the electricity and electricity. It should be noted that there are several inefficiencies that should be reduced in the future. The partitioned smooth surface is a plain crystal painting of the element that is leaked by the light leakage display element. The liquid crystal paints the quality field, the products, the electric power, the display of the electric power, and so on. The display should be reduced, or the plate should be adjacent to the or, the plate is shown by the internal surface of the crystal. The example solution is the illustration of the illustration of the illustration, the third illustration of the drawing, and the sectional drawing. The illustration is shown in Fig. 5. The illustration of the illustration 5 is the four illustration of the drawing, and the three are cut. See 4 sides, 5 tops, 4 lines shown in the picture 1 to the board cut crystal method, 3 sides along the silicon side, the plate crystals are shown on the surface, and the actual liquid crystals are shown [Please show the silicon

Page 10 594185 V. Description of the invention (5) As shown in Figures 3 and 4, the liquid crystal display panel 50 includes a transparent glass substrate 5 2 (not shown in Figure 3), one parallel to the glass substrate 5 2 and In contrast, the semiconductor wafer 54 and a plurality of pixels 56 are disposed between the glass substrate 52 and the semiconductor wafer 54. In addition, each pixel 56 includes a common electrode 58 on the glass substrate 52, a pixel electrode 60 on the semiconductor wafer 54, and a liquid crystal molecular layer 64 on the common electrode 58 and the pixel electrode. 60, and alignment films 62a and 62b. The alignment films 62a and 62b are used to adjust the alignment direction of the liquid crystal molecules in the liquid crystal molecular layer 64, and the semiconductor wafer 54 further includes a plurality of light shielding layers 72 disposed between the pixel electrodes 60 to avoid The light enters the semiconductor wafer 54, and the internal structure of each semiconductor wafer 54 is similar to that of the semiconductor wafer 14 shown in FIG. 2 and will not be repeated here. In addition, when the liquid crystal molecular layer 64 of the present invention is composed of twisted nematic liquid crystal molecules and aligned, the alignment directions of the films 6 2 a and 6 2 b are the same as those of the alignment film 20 a shown in FIG. 1 and 20b is the same, each pixel 56 has a light leakage area 56a. On the other hand, the common electrode 58 is made of a transparent conductive layer such as indium tin oxide or indium zinc oxide, and each day element 60 is made of a metal material having light reflectivity, such as aluminum. In addition, the material system is composed of polyimide (pilyimide, pi) f; U2a fossil evening (Si02) or nitride nitride evening (SiNx) Rong j; ^ ^ Rong s & 科 π r. Etc. Material, and each light-shielding layer 72 is made of black resin (res 1 η) or chromium. As shown in FIG. 3, the liquid crystal silicon display panel 30 further includes a plurality of electric fields 594185. 5. Description of the invention ⑹ ⑹ '' '' ~ ~ —— ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ 5 ~ It is shown that each electric field is coupled to the pixel electrodes 6 of the two rows of daytime electrode columns, and the poles 68, 70, and 70 are reflective conductive materials of light reflectivity, or the surface has 2 to 2 t 6 6 and is provided in each Pixels 5 to 6 are missing 1 anti-striping elements to suppress streak effect /% image. Moreover, as shown in Figs. 3, 4 and e, the element 66 includes an electrode 6 8 provided in the phase 60 =, and an electrode 70 provided in two adjacent spaces 2 gold straight to the electrode 68. In addition, in order to avoid light leakage caused by electricity, the electrodes 68 and 70 are preferably made of a metal having an antireflective structure such as chromium, indium tin oxide, or an indium zinc oxide antireflection layer. It is worth noting that the voltage V 1 is applied to the strips between the horizontal electrodes 60 and 60 between the element electrodes 60. Similarly, the liquid crystal voltage V 2 is applied to each electrode ripple effect, reducing the VI and voltage V2 equalizing voltage V1. The driving circuit of the 'liquid crystal silicon display panel 50' for the adjacent pixel V40 which is also the pixel electrode 40 of each day-time pixel electrode 40 can be applied to each electrode 6 8 so that each electrode 6 8 An appropriate electric field is generated on the adjacent day, and the electric field on the two adjacent pixel electrodes is reduced. In this way, it is possible to suppress the pixel effect of two adjacent pixels and reduce the light leakage phenomenon of the light leakage area 5 6 a. The driving circuit of the silicon display panel 50 can also apply an electric current 70 'to suppress the light leakage phenomenon of the light leakage area 56a between the two adjacent pixel electrodes 60. In addition, the voltage is a voltage that changes with position and time. The average value of the voltage of the pixel electrode 60 is preferably the average value of the voltage of the pixel electrode 60 and the average value of the voltage of the adjacent pixel electrode 60 is the better. Alternatively, in a frame, the voltage VI may be an average value of the voltages of two adjacent rows, and the voltage V 2 may be an average value of the voltages of two adjacent columns. On the other hand, voltage VI and voltage V2

Page 12 594185 At this time, the resistance of the square element is applied to other parts of the body, and it is also known as the body electricity, invention description (7) ~~ " It can be a fixed voltage, such as gamma volt (gamma volt age) from 1 to 7 " 1 0, and when the voltage y 1 and the voltage V 2 are a fixed voltage value, each electrode 6 8 and the electrode 7 0 can also be directly connected to each other. Please refer to the liquid crystal fragmentation example in the example. Each stripe element field is transferred to the floating metal layer, and the liquid crystal silicon display panel 50 shown in FIG. 3 is subtracted. The following is another implementation of the present invention. The following description is based on The same reference numerals are used to consider Figures 6 to 8. Figures 6 and 8 are top views of the broken crystal display panel. Figure 7 shows the section of the display panel along the tangent line 7-7. The component elements are arranged, and the light leakage area elements 74 provided in each pixel 56 are all electrodes. In addition, each state (floating state), and through the consumption of (c0 u p 1 i n g), to achieve the reduction of light leakage phenomenon of each pixel 56. This is not an example, which means that the hair is intended to be 74. Each of the electrodes in the domain is electrically streaked. The invention is unique and for the same Yuan and Ming Second Reality Figure 6 shows. As shown in Fig. 6, each 7 4 can be used as a pole 7 4 and its effect. 5 The i-electrode 74 can also be used to receive a voltage V3 to reduce the stripe effect between the electrodes 60 and reduce leakage. Two adjacent methods of inputting the voltage V3 to each electrode 74 are first described below. Each electrode 74 is passed through a contact plug (not shown J: 2 square f wafer 5 4 metal wind broad soil station-, And, and) is connected to the metal layer of the semiconducting milk (not shown), and passes through the sink V3. In addition, the voltage v of each electrode 74 is

Page 13

594185 V. Description of the invention (8) The voltage of the pole 6 is determined. For example, the voltage V3 of the secondary electrode A and the secondary electrode A of the turbulent electrode B and the turret electrode is based on the prime electrode. Depending on the voltage. And, too cautiously = first, the pixel electrode B and the book sound snow tray Γ can be made into a comparison table from the two original examples (700, k ... t, h 彳 f corresponding to the better voltage V3 element Electrode B and pixel electrode c :, '^ After inputting the voltage to the day, find the picture in the comparison table to find the difference between the circuit / the circuit and the judgment circuit. Ran will find the better voltage V3 Input to electrode A. In addition to the above example of the method of rotating the voltage V3 into each electrode 74, a switching element can also be provided (i) between the pixel electrodes 60, which is not shown; V each electrode 74 and Gaya * wins Reto and uses 4 switches to control the opening and closing between each electrode 74 and each element electrode 60. The display driving circuit applies a voltage between ... electrode 74 and element electrode 60 · The switching element can be turned on temporarily, so there is no circuit (〇Pen '). Therefore, the electrode 74 can receive the electric power f V3 for the day electrode 60 to suppress the streak effect and reduce the light leakage phenomenon of each day element. The voltage y3 does not need to be the same as the voltage of the pixel electrode 60. The switch element may be a thin film transistor, and the shape and position of the electrode 74 are the same. Limited to Figure 6 ^, which can be adjusted according to the process or product needs. 'For example, a square or a strip, and the position is located at any corner or one side. Figure 8 is another electrode 74. Design. Please refer to FIG. 9 'FIG. 9 is a top view of a liquid crystal silicon crystal display panel according to a third embodiment of the present invention. As shown in FIG.

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V. Description of the invention (9) The field coupling element 76 is located in the light leakage area of each pixel 56 and each of the electric field coupling elements 76 is an anti-reflection conductive layer for receiving voltage or floating. State 'to suppress the streak effect and reduce the light leakage of each day element 56. In addition,' each electric field coupling element 76 can also be an anti-reflective layer directly, so that the light leakage region of each pixel portion 56 appears dark, and It is ensured that the liquid crystal molecules in the light leakage area of each pixel 56 are not used to display the image, thereby improving the display quality of the liquid crystal silicon display panel 50. Of course, the shape and position of the anti-reflective layer 76 is not limited to that shown in FIG. 9 'It can be adjusted according to the needs of the process or product', such as a triangle or a strip, and the position is located at any corner or side. In addition, each of the anti-reflection layers 76 may be provided on the surface of the semiconductor wafer 54 or on the glass substrate 52, and each of the anti-reflection layers 76 may be made of a black resin (r e s i n) or other light-absorbing materials. Please refer to Fig. 10, which is a top view of a liquid crystal silicon crystal display panel according to a fourth embodiment of the present invention. 'The diagram is a schematic cross-sectional view of the liquid crystal silicon crystalline display panel shown in Fig. 10 along a tangent line 11 to 11'. As shown in FIG. 10 and FIG. 11, in order to make the light leakage area of each pixel 56 appear dark, so as to ensure that the liquid crystal molecules in the light leakage area of each pixel 56 are not used to display an image, each picture of the present invention Each of the pixels 5 6 includes a clean region 78 serving as an anti-striping element, which is located in the light leakage region of each pixel 56 and no blank electrode 6 is provided in each of the blank regions 7 8. 0, so it does not drive liquid crystal molecules or cause reflections. It must be noted that since the blank area 7 8 of each day element 6 6 is the area with the most severe streaking effect,

Page 15 594185 V. Description of the invention (ίο) In this embodiment, a blank electrode 60 is provided in the blank area of each day element 56 to avoid the possibility that you may see any day image x ... The eye area =, ^ pole 60, so the blank area 78 is a 'ς non-area', so that the leakage of the light leakage area of each pixel 56 can be avoided: now = and then the display quality of the liquid crystal silicon display panel 50 is improved. The shape of the * area 78 is not limited to that shown in Fig. 10, and it can be based on the process; the product is required, such as a triangle or a bar, and the position = at any corner or side. Although the above description is based on the example of a twisted nematic liquid crystal molecule, the present invention is not limited to this. In fact, the present invention is applicable to any liquid crystal display panel that produces a chirped streak effect. Moreover, the semiconductor of the present invention The chip 54 can also be replaced by a glass substrate, a plastic substrate or a substrate of any transparent material, and applied to other types of liquid crystal display panels. Compared with the conventional technology, the liquid crystal display panel of the present invention includes a plurality of electric fields. Combined elements, these electric field coupling elements are respectively located in or adjacent to the light leakage area of each pixel to reduce the effect of the streak effect, and reduce the light leakage phenomenon of each pixel to improve The display quality of the liquid crystal display panel. The above description is only a preferred embodiment of the present invention, and any equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention patent.

Page 16 594185 V. Description of the invention (11) Coverage. (11 594185 Simple illustration of the drawing Simple illustration of the drawing Figure 1 is a top view of a conventional liquid crystal display panel. Figure 2 is a cross-section of the liquid crystal silicon display panel shown in Figure 1 along a tangent line 2-2 ' Figure 3 is a top view of the liquid crystal silicon display panel of the first embodiment of the present invention. Figure 4 is a schematic cross-sectional view of the liquid crystal silicon display panel shown in FIG. 3 along the tangent line 4-4 '. Figure 5 is Figure 3 is a schematic cross-sectional view of the liquid crystal silicon display panel along the tangent line 5-5 '. Figures 6 and 8 are top views of the liquid crystal silicon display panel according to the second embodiment of the present invention. Figure 7 is a view of Figure 6 A schematic cross-sectional view of the liquid crystal silicon crystal display panel along the tangent line 7-7 'is shown. Figure 9 is a top view of a liquid crystal second crystal display panel of the second embodiment of the present invention. Figure 10 is a fourth embodiment of the present invention A top view of a liquid crystal silicon crystal display panel. Fig. 11 is a schematic cross-sectional view of the liquid crystal display panel shown in Fig. 10 along a tangent line 11 -1 Γ. Explanation of symbols in the figure

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Brief description of the drawings 10 Liquid crystal silicon display panel 12 Glass substrate 14 Semiconductor wafer 16 Pixel 16a Light leakage area 18 Common electrode 20 Daylight electrode 22a Alignment film 22b Alignment film 2 4 Liquid crystal molecular layer 26 Alignment direction 28 Alignment direction 30 Light-shielding layer 32 Silicon substrate 34 thin film transistor 36 metal layer 38 metal layer 40 contact plug 50 liquid crystal silicon display panel 52 glass substrate 54 semiconductor wafer 56 daylight 5 6a light leakage area 58 common electrode 60 daylight electrode 62a alignment film 62b alignment film 64 liquid crystal Molecular layer 66 Electric field coupling element 68 Electrode 70 Electrode 72 Light-shielding layer 74 Electrode 76 Anti-reflection layer 78 Blank area Page 19

Claims (1)

594185 VI. Scope of patent application 1. A liquid crystal display panel including: a first substrate; a second substrate opposite to the first substrate; a plurality of day elements (pi X e 1) arranged in a matrix It is disposed between the first substrate and the second substrate; and a plurality of electric field coupling elements are respectively disposed on the second substrate, and the electric field coupling elements are respectively corresponding to the pixels. 2. The liquid crystal display panel according to item 1 of the scope of patent application, wherein each of the pixels includes: a common electrode provided on the first substrate; a pixel electrode, provided On the second substrate; and a liquid crystal molecular layer is disposed between the pixel electrodes and the common electrodes. 3. For the liquid crystal display panel of the second item of the patent application, wherein each of the electric field coupling elements includes a first electrode, which is used to receive a first voltage. 4. For the liquid crystal display panel of item 3 of the patent application, wherein each of the first electrodes is connected to each of the adjacent first electrodes. 5. The liquid crystal display panel according to item 3 of the patent application, wherein each of the first electrodes is not connected to each of the adjacent first electrodes. Page 20 594185 VI. Application for patent scope 6 · If the liquid crystal display panel of the patent application scope item 5 further includes a plurality of switching elements, which are respectively disposed between each of the first electrodes and the corresponding pixel electrodes, It is used to control the opening and closing between each of the first electrodes and the corresponding celestial electrodes, and enable each of the first electrodes to obtain the first voltage through the corresponding celestial electrodes. 7. The liquid crystal display panel according to item 3 of the patent application, wherein each of the electric field coupling elements further includes a second electrode approximately perpendicular to the first electrode, which is used to receive a second voltage. 8. The liquid crystal display panel according to item 7 of the application, wherein each of the second electrodes is connected to each of the adjacent second electrodes. 9. The liquid crystal display panel according to item 2 of the scope of patent application, wherein each of the electric field coupling elements is a third electrode in a floating state (f 1 0 a t i n g s t a t e). 10. The liquid crystal display panel according to item 2 of the patent application range, wherein each of the electric field coupling elements is an anti-reflection layer. 11. The liquid crystal display panel according to item 1 of the application, wherein the first substrate is a transparent substrate and the second substrate is a transparent substrate or a semiconductor wafer. Page 21 594185 VI. Application for Patent Scope 1 2. A liquid crystal display panel including: a first substrate; a second substrate opposite to the first substrate; a common electrode provided in the A surface of the first substrate opposite to the second substrate; a plurality of pixels (P i xe 1) arranged in a matrix are arranged between the first substrate and the table, between a substrate ', and each of the pixels includes a A pixel electrode is provided on a surface of the second substrate opposite to the first substrate; a plurality of anti-fringe elements are provided on a surface of the second substrate opposite to the first substrate and respectively Phases corresponding to the pixels are used to reduce light leakage of each pixel; and a liquid crystal molecular layer is provided between the pixel electrodes and the common electrode. 1 3 · According to the liquid crystal display panel of the item No. 2 in the patent application range, each of the anti-striping elements is an electric field coupling element, and each of the electric field coupling elements includes a first electrode, which is used for To receive a first voltage to suppress the fringe effect (fr ngeeffec VII) of two adjacent δH pixel pixels, thereby reducing the light leakage phenomenon of each day element. 1 4 · The liquid crystal display panel according to item No. 3 of the patent application / application, wherein each of the first electrodes is connected to each of the adjacent first electrodes. Page 22 594185 VI. Application for patent scope 15. For example, the liquid crystal display panel of the patent application scope item 13 further includes a plurality of switching elements, which are respectively disposed at each of the first electrodes and the corresponding daylight electrodes. For controlling the opening and closing between each of the first electrodes and the corresponding day electrode, and enabling each of the first electrodes to obtain the first voltage through the corresponding pixel electrodes. . 16. The liquid crystal display panel according to item 13 of the patent application scope, wherein each of the electric field coupling elements further includes a second electrode approximately perpendicular to the first electrode, which is used to receive a second voltage to suppress Stripe effect of two adjacent pixel electrodes. 17. The liquid crystal display panel according to item 16 of the patent application, wherein each of the second electrodes is connected to each of the adjacent second electrodes. 18. The liquid crystal display panel according to item 12 of the scope of patent application, wherein each of the anti-striping elements is a third electrode in a floating state (f 1 0 a t i n g s t a t e). 19. The liquid crystal display panel according to item 12 of the scope of patent application, wherein each of the anti-striping elements is an anti-reflection layer or a non-reflection region. 20. The liquid crystal display panel according to item 12 of the application, wherein the first substrate is a transparent substrate and the second substrate is a transparent substrate or a semiconductor wafer. Page 23