TWM250179U - A retardation device for a liquid crystal display - Google Patents

Description

M250179 V. Creative Instructions (1) &quot; [Technical Field of New Type]. ^ This creation is to provide a phase deviation compensation device for liquid crystal display devices, especially a polarizing plate for high contrast and ultra-wide viewing angles. MVA-LCD can achieve the phase deviation compensation device to improve the contrast and angle of view of the product. [Previous technology] In the past ten years, owing to the booming development of the optoelectronic industry, computer-related equipment has also developed with the development of the optoelectronic industry in the direction of light weight, thinness, power saving and low radiation. However, the traditional CRT display is too bulky and <1 bulky due to the radiation problem. It is an outdated product for all the society that is moving towards weight reduction, thinness, and health considerations. Liquid crystal display (hereinafter referred to as LCD) is a display technology developed for this purpose. In the original liquid crystal display, because the phase difference compensation technology was not mature, so the so-called "ghost image" appeared, and the colors also bleed to each other. It can be said that the phase display technology is extremely distorted. The so-called phase difference can be roughly explained as the crystal grains of the LCD screen's middle layer (LC grain layer) are energized after the power is turned on. Phenomenon and phase shift state. However, with the advent of personal assistants (PDAs), tablet PCs, and even LCD TVs, the demand for high-quality LCD monitors is increasing. The most criticized shortcomings of LCD at present are its narrow viewing angle and severe color shift phenomenon. In response to this problem, researchers have developed M250179 in recent years. V. Creative Instructions (3) The arrangement structure has been broken and now it has not been removed from the substrate. In the state to the right of the dashed line in the TN LCD 1, black and intermediate voltages will produce different distortions when viewed. For example, the number of the first substrate on the same side is too small, so it is too narrow. The left side of the dotted line is the unavoidable wavelength dispersion. That is, there is. In addition, this system is formed by a weak two substrate surface electrode. In this way, it can be obtained as in the first VA system. When the pattern is shown, the bad crystal grains on the LC crystal LCD display become a few + hits on the substrate, ^ ^ w 戍 vertical, and enter the polarities ;: Through the grain layer, that is, because there is no spin #, the light re-passes the J light and is blocked, so a black color is generated on the display. Even when all the voltage is applied to it, as shown in the figure of the figure, the LC grains are not. It is completely vertical, so there is light leakage in the dark. When I is applied, the LC grains are imaged from different angles in a multi-polar polarization arrangement. That is, the observer sees from an angle other than the front side 0 2 0. In the I ps system, the arrangement of the crystal grains and the angle at which it tilts or rotates depends on the voltage applied: it also solves the problem of multi-polarized crystals. The perspective derived from the arrangement of grains is the same as in Figs. However, in the IPS, there are some non-applicable ', so the transmittance also varies with different colors. Some colors will react slowly due to different viewing angles and applied voltages, because the LC grains are rotated in a relatively large electric field, which is compared by the distance between the two electrodes that are precision-molded. The response speed of a conventional LCD is separated between two substrates. As shown in Figure 3, the v a system is different from the T N and I p s systems. When no voltage is applied, the arrangement on the left of the dashed lines in Figures 1 to 3 is perpendicular to the substrate, producing a black image at. § When using voltage, that is to the right of the dotted line in Figures 1 to 3

M250179 V. Creative Instructions (4) Schematic diagram, the grain is moved to a horizontal position to produce a white image. In the absence of voltage, all LC grains, including those on the substrate boundary, are completely vertical. In this state, the polarized light channel will not be interrupted by passing through the LC crystal layer between the upper and lower substrates, but will be blocked by the front polarizing plate. Because this is a complete block of light, the generated Black is a kind of pure black and the same degree of black is seen from the upper, lower, left, and right viewing angles. This system has a fast response speed without twisting or tilting structure, and has the characteristic that the LC grains only change between vertical and horizontal adjustment. However, as with the general TN LCD, the viewing angle of the VA system is only an intermediate level. Please refer to FIG. 2, which is a schematic diagram of the comparison between a single-array vertical arrangement of LCD in a conventional technology and a single-array arrangement of LCD in a multi-region in a conventional technology. The VA technique of the conventional technique in Figs. 2 to 1 is to tilt the LC grains uniformly to show an intermediate gray scale. Because it is arranged obliquely, the brightness depends on the viewing angle. When viewed from the front, the light seen by the viewer is only a part ’because if viewed from the front, the birefringence effect of the slanted grains will only cause part of the vision. If this base structure is viewed from an oblique direction, the birefringence effect disappears, and the area becomes black. On the other hand, if viewed from a direction perpendicular to the tilt angle, the birefringence effect is maximized 'and high brightness is produced. In order to solve this problem, a multi-domain (d o m a i n) technology is generated in 焉. In Figures 2 and 2, the grains on the left and right sides are arranged to be tilted in opposite directions. 'If the area tilted in the same direction is defined as a very small area, combining these small areas will greatly increase the brightness and viewing angle. Refer to FIG. 3, which is a schematic diagram of a conventional multi-region LC grain layer arrangement. Has been developed

M250179 V. Creative Instructions (5) A method that does not require friction technology, that is, in the oblique electric field of the obliquely arranged strips of the substrate, provides a form of obliquely arranged grains that are dynamically differentiated into two groups with a wide viewing angle and automatically form a group rubbing alignment (rubbi ng) is a new LC alignment technology. A plurality of bumps (r dge) are provided on the chip to achieve the chip component. When the potential difference passes through the two substrates, the LC grains will be tilted around the protrusions, as shown in Figure 3-11. This forms a regional pattern because the oblique electric field coincides with the oblique direction on the protrusion. With this method, the LC crystal grains have a characteristic of opposite viewing angle since the bulk region ', and thus a grain structure (c e 1 1) is generated. This arrangement technique is called "ADF; Automatic Domain Formation" π Please refer to Figures 3 and 2 on the top and bottom of the projection. In order to further improve the configuration of a substrate, the arrangement of multiple materials makes it one thing. In particular, there is a picture of an LC chip with a non-energized LC. The upper and lower layers are drawn to a plurality of recesses in various areas. More strips are recommended. The four-block design starts from the polarizer.

The sub-format of the domain is a slot design, and the two designs of the concave are combined so that the schematic diagram of the convex shape is shown in FIG. 4. The domain can make the VA LCD convex. Any LC multiple grain arrangement state design, groove design is used to know our performance has a regional band-like array. There is also a technology that has reached the maximum stability of the LC region, respectively, this technology, through changes The acquisition will be a breezy structure. State 3-2 'and Fig. 3-2 In addition, it is possible to make one or the same effect on the substrate by making protrusions. In recent years to better results. The MVA LCD is applied in the development of TFT-LCD. This dentate convex LCD. Taking this as an example, the angle between the absorption axis and the long axis of the LC crystal grains is 45. Therefore, a four-region type MV A is obtained-

Page 9 M250179

The use of light is the most efficient. Please refer to Fig. 5. The single-area vertical arrangement LCD of the conventional technology is used. #The comparison of the viewing angle and the contrast value of the multi-area vertical arrangement LC of the conventional technology. The single area on the left of Fig. 5 is vertical. When the viewing angle of the LCD display is 0 °, the contrast value is 5 (), and when the viewing angle is 8 ", the contrast value is 10; the vertical alignment LCD display of the multi-region on the right is displayed at the viewing angle of 0. The contrast value is 3GG when the viewing angle is 80. The comparison value is 10. The dark gray and light gray areas on the right are very evenly distributed, which means that the phase difference is very even. On the screen display, the color difference between different angles is not large. In contrast, on the left, the dark gray and light gray areas are very unevenly distributed. As mentioned above, in order to improve the viewing angle and contrast of existing multi-domain vertical alignment LCDs (mva — LCD; Multi-domain Vertical Alignment Liquid Crystal Display), most polarizers use biaxially-extended polarizers to perform phase difference compensation, and their optical quantities The measurement results show that the contrast can be effectively improved, and the area with a contrast (CR) of 10 has the effect of expanding to a viewing angle of 80 °. However, although the existing optical compensation methods can be extended to the full viewing angle ’, the contrast distribution cannot be effectively expanded, especially in the viewing angles of 45 °-2 25 ° and 135 ° -315. The direction still cannot be effectively improved to a contrast greater than 20, so that when viewed in this direction, there will still be a relative lack of contrast. Therefore, how to develop a phase difference compensation method 'to improve the above two viewing angle ranges with a contrast greater than 20 is a technique discussed and disclosed by this institute. [New content]

Page 10 M250179 V. Creation Instructions (7) ^ Creation ~ A kind of phase deviation compensation and wear difference compensation applied to liquid crystal display devices # ^ The purpose is to provide a phase deviation _-LCD applied to liquid crystal display devices, which can improve The contrast of products and the angle of view \ 'The wide-view screen and LCD TV can be raised to a viewing angle of 45. —2 25. The contrast of the too much direction with the direction of 1 3 5-3 1 5 ° is more than 20. The creative department includes an upper phase deviation compensation group. The upper phase deviation compensation group has a plurality of layers of phase deviation compensation layers. The arrangement from top to bottom can be a transparent substrate, a polar element, and a transparent substrate. Phase bias compensation group 'This lower phase bias compensation group has a plurality of phase bias compensation layers. The arrangement can be from top to bottom, such as the first biaxially stretched film, the second biaxially stretched film, a polarizer, A transparent substrate; a liquid crystal wafer layer is provided between the upper phase deviation compensation group and the lower phase deviation compensation group, and the outermost layers of the upper phase deviation compensation group and the lower phase deviation compensation group are further provided with a surface treatment layer. π layer Features and contributions To make those familiar with this skill understand the purpose of this creation, we will use the following specific examples, together with the details to explain later. [Performance method] Please refer to Figure 6 for the physical characteristics of the compensation film. Figure 6_1 is a standard positioning map that defines the directions of χ, y, and ^, and shows the standard refractive index of the X-axis refractive index, the y-axis refractive index, and the z-axis refractive index. nx = ny = nz means it. Compensation is generally

Page 11 M250179 V. Creative Instructions (8) There are three kinds of films, one is A-plate, as shown in Figures 6-2 and 6-3; one is C-plate, as shown in Figures 6-5 and 6- Figure 6; and the other biaxially stretched film (bi ax ia 1 p 1 ate as shown in Figure 4 A- plate is divided into p-A-plate (positive A- plate) as shown in Figure 6-2, and nA-plate (negative A-plate) is shown in Figure 6-3, and its physical properties are as follows: pA-plate: nx &gt; ny = nz, nA-plate: nz = nx &gt;ny; C-plate It is divided into pC-plate (positive C-plate), as shown in Figures 6-6, and nC-plate (negative C-plate), as shown in Figures 6-5, which have the following physical properties: PC -p 1 ate · η ζ &gt; η X = ny, η-C-p 1 ate: η X = ny &gt; η z; biaxial plate, as shown in Fig. 6-4 Physical properties: nx &gt; ny &nz; where ηχ is the refractive index of the y-axis, ny is the refractive index of the y-axis, and nz is the refractive index of the 2 axis. Therefore, the following formula defines the plane refraction R0 and the thickness Refraction Rth, that is: ^ = n y) * d, Rth = (((nx + ny) / 2) —nz) * d4Rth = (nx — nz) /, In which, d is the path length of the light through a medium. From the above, it can be seen that the refractive index of the PA-plate in the X direction is the largest, and the refractive index in the ϋ direction is the same; the refractive index of the n-A_plate in the Z-age direction is the smallest in the yf direction; the refractive index of the p_c_plate in the z-direction is笪 七 耵 丰 相 4, n — C-Phte has the smallest refractive index in the X and y directions; the biaxially stretched film has the largest refractive index in X Λ, followed by the refractive index in the y direction, and the refractive index in the ζ direction. Righteousness

Page 12 M250179 V. Creative Instructions (9) Please refer to the schematic diagram of the arrangement of the multi-region LC grain layer shown in Figure 7. This is a state where the crystal grains in the MVA-LCD crystal grain layer are perpendicular and inclined. When there is no current flow, as shown in Figure 7 ~ 1, that is, there is no electric field, and each grain is upright! At this time, the vertical angle is upright. At this time, it is also in a dark state. If current is applied, As shown in Figures 7 to 2, when there is an electric field, each grain is standing at an inclined angle, and it is also in a bright state at this time. Please refer to Figure 8, the LC mentioned in the figure The grain layer 15 'this creation is to compensate for the LC grain phase deviation. The display layer of this embodiment is composed of a first TAC (triacetic acid 13 and a second TAC (triacetic acid fiberboard) in total including a first biaxial extension and a second PVA (polyvinyl alcohol) 18 in total. Surface treatment layer 20. This is a preferred embodiment of this creation. At the sixth time, an LC grain layer layer 15 located in the middle position is composed of a main arrangement of bits generated in a bright state and a dark state into a liquid crystal screen. t surface treatment layer 11 upper polarizing plate, first pVA (polyvinyl alcohol) extension layer 15; lower polarizing diaphragm 16, one yam quilt A, one, two first and axially stretched film 17, one second TAC (triacetic acid) Fiber) 19; Once the LC grain layer 15 is in a dark state, i has a thickness refraction, which must be relied on, and the refraction produced at this time is compensated, that is, the part of Rth. The thickness of the film (triacetate) is 14. The first biaxial extension of the second TAC, which can be configured by Satoshi 'η 广', can compensate the R th produced by the LC crystal layer 15. Membrane 1 7 When LC crystal layer 15 is in a bright state, ^ 7 T 8th is two slaves ΛΑ refraction in plane, must rely on hair, oblique At this time, he compensated the film by compensating for the plane square M250179. V. The creative description (ίο) phase difference was compensated back, that is, the part of R0. Therefore, the first double film configured = extension film 16 and the second biaxial extension The film 17 can supplement the r0 produced by the LC grain layer 15, so that all refraction errors can be compensated. Other related components, such as the upper surface treatment layer 1 and the lower surface treatment layer 2 are protective and resistant Glare, anti-reflection, anti-scratch, anti-fouling, anti-static, etc .; first TAC (diacetate fiber) 丨 2 and third TAC (triacetate ^ nm (polyethenol) 13 and second pVA (polyvinyl alcohol) 18 ^ = has the effect of thinking about light, which can achieve the purpose of purifying light. The above-mentioned creation is a preferred embodiment. However, the first TAC (three to tth雔 ΓρνΑ (polyvinyl alcohol) 13, second tac (triacetate fiber; i = 8, two TAC (triacetate fiber) 19, there are still other arrangements: The following sequence is: TAC ^ Example, as a second implementation The upper polarizing plate of the example is from the top and μΐ is (triacetate), pVA (polyvinyl alcohol), the first reed cone Γ (triacetate); lower polarized light The plate is θ in order from top to bottom: axially stretched film, PVA (polyvinyl alcohol), TAC (triacetate fiber),); (\ '1's polarized light from top to bottom is: TAC ( Triacetic acid stretch film. The next layer of biaxially stretched film, the second layer of biaxial pvaK B :: the board from top to bottom are: TAC (triacetate), r vinyl alcohol), TAC (triacetate). Furthermore, in a preferred embodiment, 0 is extended with the lower phase deviation compensation group M ′, and the phase deviation compensation device has a compensation of a biaxially stretched film with an increased viewing angle, so that the gray level m: layer in the dark state

Page 14 M250179 V. Creative Instructions (11) 45 -2 25 and 135 _315. Orientation compensation is better, so that the contrast value can be greater than 20 at full viewing angle. On the other hand, the compensation of the two-layer biaxially stretched film also makes the color saturation relatively higher. Although this creation is disclosed as above with a preferred embodiment, it is not intended to limit the creation of 'any person familiar with this art, without departing from the essence and scope of this creation', can make various changes and retouching Therefore, the scope of protection of this creation shall be defined by the scope of patent application attached after the event.

Page 15 M250179 Simple Explanation [Simplified Illustration] Figure 1 is a schematic diagram of a single die arrangement of three conventional LCDs; Figures 2-1 and 2-2 are vertical LCDs with a single area of conventional technology A single die and a multi-region vertical arrangement of LCDs are not as intended by the driver than the original one. Figures 3-1 and 3-2 are schematic diagrams of the multi-region LC die layer arrangement of conventional technologies. Fig. 4 is a schematic view of a plurality of strip-shaped protrusions applied to a TFT-LCD in the conventional technology; Fig. 5 is a view of a viewing area and a contrast value of a vertically arranged LCD in a single area of the conventional technology and a multi-area vertically arranged LCD in the conventional technology Comparative schematic diagrams Figures 6-1 to 6-6 are schematic diagrams of the physical characteristics of the compensation film; Figure 7 is a schematic diagram of multi-region LC grain arrangement; Figure 8 is a preferred embodiment of this creation. [Illustration of drawing number] 11 Upper surface treatment layer 12 First TAC (diacetate) 13 First PVA (polyvinyl alcohol) 14 Second TAC (diacetate) 15 LC crystal layer 16 First biaxially stretched film 17 Second biaxially stretched film 18 Second PVA (polyvinyl alcohol)

P.16 M250179 Simple illustration 19 Third TAC (Triacetate) 20 Lower surface treatment layer

Claims (1)

2 4 M250179 6'Applicable patent scope A phase deviation applied to a liquid crystal display device includes: a upper phase deviation compensation group, the upper phase deviation complex layer phase deviation compensation layer; = lower phase deviation compensation group, the lower phase deviation complex number Stratigraphic phase deviation compensation layer; Binocular: the difference compensation group and the lower phase deviation compensation day BΘ sheet. If the phase deviation compensation of item 丄 of the scope of the patent application is set, one of them can be set to _ ,, and medium. The scope of the scope of the patent application is 1 layer. One of the applications described above for phase deviation compensation can be provided with a table, which is the second or T layer of the scope of patent application. Phase deviation compensation of the display device] Anti-glare. The device has an anti-reflection property as described in the patent application scope No. 24 for the phase deviation compensation of the display device. The device is scratch-resistant as described in the phase deviation supplement of the second display device of the patent application. The secret device, in which the compensating device, includes a difference compensation group having a difference compensation group having a phase deviation compensation group for the liquid crystal display device and a phase deviation compensation group for the liquid crystal display device. A surface treatment layer is applied to liquid crystals. The surface treatment layer is applied to liquid crystals. The surface treatment layer 6 M250179 6. Patent application display device W AW _L θ Shixia phase deviation compensation device, wherein the surface treatment chip has antifouling Sex. 9 8 Β2 = one of the patent scope 2 or 3 applied to liquid crystal 9 &quot; Phase phase deviation compensation device, wherein the surface has antistatic properties. The phase deviation compensation device applied to liquid crystal display devices described in item 1 of Zengyue's patent scope, wherein the upper phase deviation compensation group • S-day film phase deviation compensation layer is arranged from top to bottom in order Compensation group ^, polarized element, transparent substrate; the lower phase deviation compensation ^? The arrangement of the sheet phase deviation compensation layer from top to bottom according to the element: axis stretch film, the second layer of biaxially stretched film, biased 1: A kind of multiple phase as described in item 1 applied to the liquid crystal display device, and the phase deviation compensation component transparent substrate, Yuan: Under layer ::: Two ::: Lower difference: Sequence compensation: The r :: r difference compensation layer has a row and a transparent substrate. · The first layer is the axis extension film and the polar element 11 · As the phase deviation compensation device of the first range of the patent application of Shenjing;:; applied to the liquid crystal display device complex ^ 1 ^ ', ^ upper phase deviation compensation group •• Transparent Base #, Polarization Element, Wangyi Exhibition: From top to bottom, the first layer of biaxially stretched film, the second layer, page 19, M250179 VI. Patent application scope of biaxially stretched film; the lower phase deviation The arrangement mode of the plurality of phase-phase deviation compensation layers of the compensation group from top to bottom is: a transparent substrate, a polarizing element, and a transparent substrate. 12. A phase deviation compensation device applied to a liquid crystal display device according to item 9, 10, or 11 in the scope of the patent application, wherein the material of the transparent substrate is triacetate (TAC), PC, COC. 13. A phase deviation compensation device applied to a liquid crystal display device according to item 9, 10, or 11 in the scope of the patent application, wherein the material of the polarizing element is polyvinyl alcohol (PVA). Page 20