TW591317B - Manufacturing method and structure of reflective liquid crystal display - Google Patents

Abstract

The present invention discloses a manufacturing method and structure of reflective liquid crystal display, which can improve the light leakage phenomenon of reflective liquid crystal display. The method includes the steps of: first providing a substrate formed thereon a plurality of gate lines in parallel with each other and a plurality of data lines in parallel with each other, wherein the gate lines and data lines are vertically intersected, a pixel area is formed between two adjacent gate lines and two adjacent data lines, a source-drain area is formed in the pixel area, and the source is electrically connected to one of the two adjacent data lines; and then forming a pixel electrode on two adjacent pixel areas for covering the data line between the two adjacent pixel areas, so as to drive liquid crystal for use as a light source reflective layer, which is electrically connected to the drain.

Description

591317 V. Description of the invention α) The technical field to which the invention belongs is particularly related, and the present invention relates to a process of a reflective liquid crystal display to improve the light leakage of the reflective liquid crystal display. The liquid crystal display of the prior art is (U quidcrysta 1 disp 1 ay, hereinafter referred to as Lf1? 疋 疋) the mainstream of the development of flat panel display. Its display principle is to use the dielectric anisotropy and conductive anisotropy of liquid crystal molecules. When an electric field is applied, the arrangement of liquid crystal molecules is switched, which causes various photoelectric effects on the liquid crystal film. In liquid crystal displays, liquid crystals play the role of a light valve. The state of the liquid crystal array is changed by using different voltages to control the light source to pass through the liquid crystal light. The brightness of the valve reaches the gray scale of the display. Therefore, a high-efficiency flat light source, called a moon light source, must be provided on the back of the transmissive liquid crystal display. The translucent liquid crystal display consists of an LCD panel and a backlight module. However, the power consumption of the backlight module accounts for about 60% to 80% of the power consumption of the entire transmissive liquid crystal display, which is disadvantageous for the development of portable electronic products that seek to save power. Reflective liquid crystals The display is on the liquid crystal panel. The lower plate is made or pasted with a reflective layer, and the external ambient light is used as the illumination light source. However, the cost of manufacturing the backlight module is low, and the power consumption is low during use. Under the same power supply, the use time can reach several times more than that of the transmissive liquid crystal, which greatly increases the competitiveness and practicality of mass production. TFT Active array LCDs use thin film transistors (thin tranS1Str, hereinafter referred to as TFT) as active components, which have the advantages of low, low cup electrical power, low voltage drive, thin, light, etc. Therefore, thin films are used.

Page 5 591317

:: Motion element '& cry with the above-mentioned external environment shoot-type liquid crystal display, driven by 勹', ', radio-source TFT back pressure drive, f, light, etc., make 1 t consume electric power, low power ^ ^ I make it very important. m-:: The main test section: Figure: Figure 2, the top view of the tank line u η cut; Figure 2 is a cut along the green U — II cut along the first figure. The number f ^ 11 is not known, the conventional 1 ^-the LCD active array substrate 0 includes a plurality of gate lines 2 arranged in rows, a plurality of longitudinal and parallel shell material lines 4, and a plurality of adjacent gates Line 2 and data line 4 are arranged in a matrix in an approximately rectangular area in the TFT_LCD. In addition, each pixel region 6 includes a pixel element 8 covering a rectangular region 'and a TFT source-drain. In the electrode region 10, the gate 12 of the TFT source-drain region 10 is vertically protruding from the gate line 2. The drain electrode is electrically connected to the pixel electrode 8 through a contact hole 7, and the source electrode The electrode 16 is electrically connected to the data line 4. The cross-section taken along line II-II in the above first figure is shown in second figure, where 0 is the substrate, 4 is the data line, 5 is the insulating layer, and 21 is the wave-shaped protrusion provided on the surface to increase the surface. The undulations increase the reflection of the light source. 22 is a transparent photoresist layer. This layer can be selected according to the specifications, or it can be omitted. 8 is a day element electrode. Generally, a highly reflective metal material is used to reflect the light source. The substrate 0 is generally composed of a glass substrate, a metal layer formed at intervals, and a passivation layer (not shown). In the design of a general reflective TFT-LCD active array substrate, the area covered by the pixel electrode 8 can not only be aligned by the direction of the upper liquid crystal molecules after being energized.

0632-8723TWf (nl); AU91177; Renee.ptd page 6 591317 V. Description of the invention (3) :: 2 2 t The light source made of I is opaque and reflective. The use of reflective layers. However, due to the limitation of its coverage area; =; daytime zone 6 surrounded by the bucket line 4 and the gate line 2, or sometimes extended to the two two / knife & interpolar line 2 or part of the data line 4 ' Therefore, the liquid crystal molecules located above two adjacent celestial lines 2 and the material line 4 are controlled by the celestial electrode 8 and the column direction. When the LCD Snormal white mode (that is, no power is applied ^ the liquid crystal alignment direction can make light The panel is white; after the current is turned on, the liquid crystal arrangement direction blocks the light source and makes the panel black). After the power is turned on, some materials retain the original alignment direction, that is, the light source still has a second part under the dark surface =:: plus The data line 4 is formed of a metal material and can reflect ambient light. Therefore, it is easy to cause the so-called light leakage and reduce the contrast of the display. The use of the light leakage indicator in the invention changes the polarity to the prime area of the phenomenon. The existence of the phenomenon is tolerated here. The phenomenon is the structure and the data line of the pixel electrical data line. The present invention aims to achieve the above-mentioned purpose by reducing the cost of the method. Its poles are positioned to cover and simultaneously cover the phase. Although the problem is in this area, it is invented by the leakage in this area. In other words, the present invention adopts a new method to form the conventional liquid crystal liquid crystal which is adjacent to two adjacent pixels and is still under its direct light phenomenon. The good-reflective liquid crystal mentioned in the Ming Dynasty proposed a reflective active array substrate formed in the daylight region. The area between the electrodes is easily turned due to reflection. There is no metal in the LCD display. The daylight element 1 leaks;) Move to彳 Unable to ii light material 1 device

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Page 7 To improve reflective LCD

591317 V. Description of the invention (4) Disgraceful slogan; :: Method for making reflective liquid crystal display with light leakage = 100, including providing a substrate first, with a plurality of parallel formed on it: polar lines and plural The data lines that are parallel to each other, and the gate line and the data line are the first and second prime areas, and the two adjacent lines form a day-to-day ice-to-percentage area. There is a source-drain region, and the source system is electrically connected to one of the data lines in the Γ shell material line. Second, a ^ is formed, which is on the adjacent diurnal prime region and covers the above phase at the same time. The next two paintings are: the data line between which is used to drive the liquid crystal and is used as the reflective layer of the light source and forms an electrical connection with the above drain electrode. Cheng Youyi The structure of a reflective liquid crystal display includes a substrate with an upper shape , And U :: f parallel gate lines and a plurality of mutually parallel data lines and adjacent two data lines; the father of the father, "and in the above-mentioned daytime prime region of the adjacent two interpolar lines, and the source- The non-polar region is formed on the line to form an electrical connection; and, and-data in two adjacent data lines, and At the same time, the upper two liquid crystals formed on the adjacent two diurnal prime regions are used as a source and line to reflect sound ^ denier t ^, which is used to drive the above diurnal electrodes to be "Li; the drain electrode is electrically connected. The above-mentioned day element electrode can be further formed into materials such as Shao, silver; according to the present invention, the reflection line is divided into 4 gate points. Since the structure and manufacturing method of the pixel electrode step 2 === 15 are the same, it is easy. Combining with the current method, the method and the conventional method are used to effectively improve the findings. The purpose, characteristics and advantages are more obvious and easier to understand.

0632-8723TWf (nl); AU91177; Renee.ptd Page 8 591317 V. Description of the invention (5) The following describes the preferred embodiments in detail with the accompanying drawings, as follows: Embodiments Examples The present invention The manufacturing method of the reflective liquid crystal display is the same as the conventional method before the step of forming the day electrode. Figures 3A to 3C are top views showing the manufacturing process of the reflective TFT-LCD active array substrate of this embodiment. First, as shown in FIG. 3A, a substrate such as glass is provided, and a deposition process and a first lithography etching step (PM- 丨, ie, using the first photomask) are performed to form a horizontally extending parallel gate. The polar lines 200 and 201 are on the substrate 0, wherein the gate line 200 has a protrusion, and the protrusion is a gate 12. Next, a gate insulating layer 5 (not shown) is formed on the gate lines 2000, 2000, 12 and the substrate 0. Among them, the gate lines 2000, 2001, and the gate 12 are, for example, metal layers formed by the > product method. Among them, the gate insulating layer 5 is, for example, a silicon dioxide layer, a silicon nitride (S N &) layer or a silicon oxynitride layer formed by a hafnium deposition method. χ Next, according to Figure 3B, perform a deposition process and a second lithography etching step (PEP-II, that is, use a second photomask) to form an α _Si layer (at η + α-S 1 layer 1 3 below, not shown) and n + a-S i layer 1 3 on part of the gate insulating layer 5 'wherein the α-Si layer and the η + α-Si layer 13 constitute a semiconductor island located in the transistor region 10 (A—Si semiconductor island). Then refer to Figure 3C, first deposit a conductive layer (not shown), and then perform the third lithography I insect engraving step (P E P-I I I, that is, use a third mask)

0632-8723TOf (nl); AU91177; Renee.ptd Page 9 591317 V. Description of the invention (7) Light zone 'Finally, the active array substrate and the color filter substrate are bonded together, and then liquid crystal is poured into the substrate and sealed. That is, the production of the reflective liquid crystal display of this embodiment is completed. As shown in FIG. 3D, the structure of the reflective liquid crystal display of this embodiment includes a substrate 0 on which gate lines 200, 201 parallel to each other and data lines 40 0, 401 parallel to each other are formed, and Gate lines 2 0, 201 and data lines 4 0, 4 0 1 intersect perpendicularly. A celestial region 6 ′ is formed between the adjacent gate lines 2000 and 2000 and the adjacent data lines 400 and 401, and a transistor region 10, a source electrode 16 and data are formed in the celestial region 6. Line 4 0 0 forms an electrical connection. The structure of this embodiment includes a day element electrode 801 formed on the adjacent two day element regions 6, 9 and covers the data line 4 0 between the pixel regions 6, 7 at the same time. The features of this embodiment are shown in Fig. 4. Fig. 4 is a cross-sectional view cut along the tangent line V-V of Fig. 3D, where 0 is a substrate, 4 is a data line, 5 is an insulating layer, and 21 is provided at The wave-shaped protrusions on the surface are used to increase the undulations on the surface to increase the reflection of the light source. 22 is a transparent photoresist layer, 8 is a day element electrode, and a highly reflective metal material is used to reflect the light source. The above-mentioned substrate 0 through # is composed of a glass substrate, a metal layer formed at intervals, and a passivation layer (not shown). It can be clearly seen from FIG. 4 that according to the structure and manufacturing method of the reflective liquid crystal display of the present invention, the daylight electrode 8 0 1 that is conventionally formed in the pixel area 6 is moved above the material line 4 01. In order to cover the data line 4 which was originally liable to cause light leakage due to reflection, and simultaneously move the area between the two celestial electrodes 801 and 802 to the center of the celestial area 6, at this time, although this area is above The LCD still has the problem of insufficient steering and unable to deflect to the design angle, but because it is directly below

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Page 11 591317 V. Description of the invention (8) Fang does not have a metal reflective material, which can reduce the light leakage in this area and improve the performance of the liquid crystal display. According to the structure and manufacturing method of the reflective liquid crystal display of the present invention, since the manufacturing method before the step of forming the day electrode is the same as the conventional method, it is easy to combine with the current method without increasing the cost of production equipment. Can effectively improve the phenomenon of light leakage. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications and retouching without departing from the spirit and scope of the present invention. The scope of protection shall be determined by the scope of the attached patent application.

0632-8723TWf (nl); AU91177; Renee.ptd Page 12 591317 Brief Description of Drawings Figure 1 shows a top view of a conventional reflective TFT-LCD active array substrate. Figure 2 is a sectional view cut along the tangent line I I-I I in Figure 1. 3A to 3C are top views showing a manufacturing process of a reflective TFT-LCD active array substrate according to an embodiment of the present invention. FIG. 3D is a top view of a reflective TFT-LCD active array substrate according to an embodiment of the present invention. Fig. 4 is a sectional view cut along the tangent line V-V of Fig. 3D. [Symbol description] 0 ~ substrate; 2, 2 0, 2 0 1 ~ gate line; 4, 4 0 0, 4 0 1 data line; 5 ~ insulating layer; 6, 9 ~ day prime area; 7 ~ contact Holes; 8,801,802 ~ day electrode; 10 ~ transistor area; 12 ~ gate; 13 ~ η + α-Si layer; 1 ~ 4 drain; 16 ~ source electrode; 2 1 ~ Wave-shaped protrusions; 2 2 to transparent photoresist layer.

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Claims (1)

«2 丄 /« 2 丄 / Revised version ^ SS_J2100399 6. Application for patent scope 1-Two yyii. A type of reflective liquid crystal display crying from the light leakage phenomenon of seven, t 廿 · type LCD display:-can improve the reflection and provide a A ^ ° ^ · line and plural lines: head] flat ;; JH: there are a plurality of parallel gate prime regions, and the two adjacent data lines 资料 ^ 4 :: one of the data lines Electrical connection; and the adjacent two days; on the celestial area, 1 is used to cover the upper reflective layer at the same time: 丄 丄; d Φ is used to drive the liquid crystal and is used as the light source electrode to move to the celestial area Inside. —Su Dian Produce U Shen :! The method of the reflective liquid crystal display according to item 1 of the utility model is described above, wherein the day electrode is a metal. 3. The manufacturing method as described in item 1 of the scope of the patent application, wherein the daylight electrode is a Ming or silver reflective liquid day-day display; manufacturing method; Lili; reflective liquid crystal display as described in item 1 The / / ~ ~ the denier electrode further covers part of the gate line. Said :: The structure of the reflective liquid crystal display, which can improve the light leakage phenomenon of the reflective liquid every day, including: a substrate; a plurality of parallel gate lines and a plurality of parallel lines are formed in the On the substrate, and the gate line and the data line intersect perpendicularly, and form a diurnal zone between the adjacent two gate lines and the adjacent two data lines; the source and the pole area are formed in the diurnal zone , And the source is related to the 0632-8723TWFl (Nl); AU91177; ICRptc Page 14 591317 ---- Case No. 921003M__T Month 倏 _ VI. Patent application scope ^ ~ ^-One of the two adjacent data lines forms an electrical connection; And a daylight element electrode is formed on the adjacent two pixel area, and simultaneously covers the data line of the above-mentioned adjacent daylight interval, which is used to drive the liquid crystal and serve as a light source reflection layer, and is connected to the drain electrode. An electrical connection is formed, and the space between adjacent diurnal electrodes is moved to the diurnal zone. 1 "6 · The structure of a reflective liquid crystal display according to item 5 of the scope of patent application, wherein the day electrode is a metal. 7 · The structure of a reflective liquid crystal display according to item 5 of the scope of patent application, wherein the The pixel electrodes are aluminum or silver. 8. The structure of the reflective liquid crystal display according to item 5 of the scope of patent application, wherein the day electrode further covers a part of the gate line. 9 · A method for manufacturing a reflective liquid crystal display, which can improve the light leakage phenomenon of the reflective liquid crystal display, including: ^ providing a first substrate on which a plurality of gate lines and a plurality of two flat lines are formed; Data lines that are parallel to each other, and the above-mentioned gate lines and duty lines intersect perpendicularly to form a dentin region between adjacent two gate lines and adjacent two data lines, and a source electrode is formed in the day-prime region- Drain region, and The source is electrically connected to one of the two adjacent data lines; a pixel electrode is formed on the adjacent two pixel area and covers the data line of the adjacent two pixel interval For driving the liquid crystal and as a light source reflection layer, and forming an electrical connection with the drain electrode, and the space between adjacent diuron electrodes is moved to the diurnal region; and a second substrate is provided on the first substrate. At a predetermined distance above a substrate, a plurality of color filter regions are formed thereon; 591317 King No. 92100_ VI. Scope of patent application The above-mentioned daylight regions are respectively aligned above the first and second substrates with a color filter area; and the above first and second substrates are bonded. 1 0. The method for manufacturing a reflective liquid crystal display as described in claim 9 of the patent application range, wherein the day electrode is a metal. 1. The method for manufacturing a reflective liquid crystal display device as described in item 9 of the scope of patent application, wherein the daylight electrode is tin or silver. 1 2 · The method for manufacturing a reflective liquid crystal display according to item 9 of the scope of patent application, wherein the day electrode further covers a part of the gate line. 13. A structure of a reflective liquid crystal display, which can improve the light leakage phenomenon of the reflective liquid crystal display, including: a first substrate; a plurality of gate lines parallel to each other and a plurality of data lines parallel to each other On the first substrate, and the above-mentioned interpolar lines and data lines intersect perpendicularly, and = a dipole region is formed between the adjacent two gate lines and the adjacent two data lines; a source-drain region is formed in the diphemic region And the source is electrically connected to one of the ^ f-data lines, and the interval between adjacent two gold f electrodes is moved to the daytime region; and once the phase is formed: daytime formation In the adjacent two pixel regions 1, and simultaneously covering the data line 'Xiao of the phase 4 one pixel interval, to drive the liquid crystal and the reflective layer, and form an electrical connection with the drain; ~ Xianyuan /, A second substrate is disposed at a predetermined distance above the first substrate, and a plurality of color filter regions are formed, so that each pixel region has a Taizu /, a color filter region. 1 Should be formed with 591317 _ Case No. 92100399 6. Scope of patent application: Amendment 1 4. The structure of the reflective liquid crystal display as described in item 13 of the scope of patent application, wherein the daylight electrode is metal. 1 5. The structure of the reflective liquid crystal display according to item 13 of the scope of patent application, wherein the daylight electrode is aluminum or silver. 16. The structure of the reflective liquid crystal display according to item 13 of the scope of patent application, wherein the day electrode further covers a part of the gate line. 0632-8723TWFl (Nl); AU91177; ICE.ptc page 17