CN103323984B - Liquid crystal indicator - Google Patents
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- CN103323984B CN103323984B CN201210075676.8A CN201210075676A CN103323984B CN 103323984 B CN103323984 B CN 103323984B CN 201210075676 A CN201210075676 A CN 201210075676A CN 103323984 B CN103323984 B CN 103323984B
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Abstract
The present invention provides a kind of liquid crystal indicator.Above-mentioned liquid crystal indicator includes a first substrate, and it has pixel cell, and pixel cell has a pixel electrode, including a main electrode area and a slit area；Above pixel cell, one first edge along a horizontal direction has one first intermediate point；A main electrode area first side horizontally over has one second intermediate point, and wherein the second point midway is in the first intermediate point left；Main electrode area is positioned at above-mentioned second intermediate point left and has a second side, and wherein second side and first side form one first angle in main electrode area, and the first angle is be more than or equal to 90 degree；One second substrate, it has a counter electrode；One liquid crystal layer mixing chiral agent, is arranged between first substrate and second substrate.
Description
Technical field
Present invention is directed to a kind of liquid crystal indicator, system is related to the electrode design of a kind of liquid crystal display especially.
Background technology
Liquid crystal indicator system utilizes liquid crystal molecule under different ordered states, has the characteristic of different polarizations or refraction effect to control the penetration of light for light, and then makes liquid crystal indicator be produced image.Tradition stable twisted nematic (TwistedNematic, TN) liquid crystal indicator, has an extraordinary through characteristic, but is subject to the impact of liquid crystal molecule structure and optical characteristics, and its visual angle is very narrow relatively.Therefore how to allow display have wide viewing angle and high light utilization efficiency concurrently simultaneously, counter plate Display Technique is caused new breakthrough.
In order to solve this problem, recent dealer has developed vertical orientation type (VerticalAlignment, VA) wide viewing angle liquid crystal display device, such as: figure vertical orientation type (PatternedVerticalAlignment, PVA) liquid crystal indicator, multiregional vertical align type (Multi-domainVerticalAlignment, MVA) liquid crystal indicator etc.；Wherein PVA type is the purpose utilizing fringing field effect and compensating plate to reach wide viewing angle.It is then that a pixel is separated into multiple region as MVA type, and use the special pattern structure (electrode pattern) of thrust or transparent conductive film of In-Sn oxide (ITO), enable the liquid crystal molecule being positioned at zones of different to topple over towards different directions, therefore can reach wide viewing angle and the effect promoting penetrance simultaneously.
But, the design of above-mentioned electrode pattern is relevant with the rotation of liquid crystal molecule itself.The rotation of liquid crystal molecule itself if electrode pattern design cannot be arranged in pairs or groups, can make in viewing area because of liquid crystal molecule is not toppled over or dump angle mistake and the Optical Dark Solitary Pulse stricture of vagina distributed areas change that produces causes that greatly penetrance declines.In view of this, how to promote the penetrance of liquid crystal indicator further, be the important topic of present displays technology.
Summary of the invention
In view of this, one embodiment of the invention system provides a kind of liquid crystal indicator, and above-mentioned liquid crystal indicator includes a first substrate, and it has at least one pixel cell, and above-mentioned pixel cell cording has a pixel electrode, including a main electrode area and a slit area；Above above-mentioned pixel cell, one first edge along a horizontal direction has one first intermediate point；Having one second intermediate point along a first side of above-mentioned horizontal direction above above-mentioned main electrode area, wherein above-mentioned second point midway is in above-mentioned first intermediate point left；Above-mentioned main electrode area is positioned at above-mentioned second intermediate point left and has a second side, and wherein above-mentioned second side and above-mentioned first side form one first angle in above-mentioned main electrode area, and above-mentioned first angle is be more than or equal to 90 degree；One second substrate, it has a counter electrode；One first polaroid, is arranged at below above-mentioned first substrate；One second polaroid, is arranged at above above-mentioned second substrate, and its polarizing axis is vertical each other with the polarizing axis of above-mentioned first polaroid；One liquid crystal layer mixing chiral agent, is arranged between above-mentioned first substrate and above-mentioned second substrate.
Another embodiment of the present invention system provides a kind of liquid crystal indicator, and above-mentioned liquid crystal indicator includes a first substrate, and it has at least one pixel cell, and above-mentioned pixel cell cording has a pixel electrode；One second substrate, it has a counter electrode, and above-mentioned counter electrode includes: a main slit of cross, and above-mentioned counter electrode is divided into four quadrants, and being shaped as of a slit area in the above-mentioned quadrant of at least one of which is trapezoidal；One first polaroid, is arranged at below above-mentioned first substrate；One second polaroid, is arranged at above above-mentioned second substrate, and its polarizing axis is vertical each other with the polarizing axis of above-mentioned first polaroid；One liquid crystal layer mixing chiral agent, is arranged between above-mentioned first substrate and above-mentioned second substrate.
Accompanying drawing explanation
For the above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 be one embodiment of the invention the profile of liquid crystal indicator.
Fig. 2 is the top view of the electrode pattern in a pixel of the liquid crystal indicator of one embodiment of the invention.
Fig. 3 a is without when applying electric field, one embodiment of the invention the side view of Liquid Crystal Molecules Alignment of liquid crystal indicator.
Fig. 3 b for applying under electric field, one embodiment of the invention the side view of Liquid Crystal Molecules Alignment of liquid crystal indicator.
Fig. 4 a is the top view of the pixel electrode least unit pattern of the liquid crystal indicator of comparative example.
Fig. 4 b～4c is the top view of the pixel electrode least unit pattern of the liquid crystal indicator of other comparative examples.
Fig. 4 d～4e is the top view of the counter electrode least unit pattern of the liquid crystal indicator of comparative example.
Fig. 4 f is the viewing area penetrance schematic diagram of the liquid crystal indicator of the comparative example of the pixel electrode using Fig. 4 a, 4d to show and counter electrode pattern composition.
Fig. 5 a～5c is the top view of the pixel electrode least unit pattern of the liquid crystal indicator of different embodiments of the invention.
Fig. 6 is the top view of the counter electrode least unit pattern of the liquid crystal indicator of different embodiments of the invention.
Main element symbol description:
100-1～the first edge；
100-2～the second edge；
100-3～the 3rd edge；
100-4～the 4th edge；
102a1～102a3,102b～102d, 302a1,302a2,302b～main electrode area；
104,114～branch sub-electrode；
106,116～slit；
108a1～108a3,108b～108d～slit area；
110-1,116-1,120-1,124-1～first side；
110-2,118-1,122-1,126-1～second side；
110-3,116-2,120-2,124-2～the 3rd side；
110-4,118-2,122-2,126-2～four side；
116-3,120-3,124-3～the 5th side；
118-3,122-3,126-3～the 6th side；
116-4,120-4,124-4～heptalateral limit；
118-4,122-4,126-4～the 8th side；
202～mix the liquid crystal layer of chiral agent；
203～liquid crystal molecule；
204,212～substrate；
206a1,206a2,206b～counter electrode；
208～second substrate；
210～the second polaroids；
214～first substrate；
216a1～216a3,216b～216d～pixel electrode；
218～the first polaroids；
222～the first compensate film；
224～the second compensate film；
The main slit of 300～cross；
301～cross-point；
304a1,304b～secondary slit area；
304a2～slit area；
308～secondary slit；
206b1～206b4～quadrant；
310e～border；
400～pixel；
422～pixel cell；
402～horizontal direction；
404～vertical direction；
406,600,608～slit；
500～liquid crystal indicator；
A1～a4, b1～b4, d1～d4, e1～e4, f1～f4～intermediate point；
C1, h1～first summit；
C2, h2～second summit；
C3, h3～the 3rd summit；
C4, h4～the 4th summit；
A1, B1, C1～first angle；
A2, B2, C2～second angle；
A3, B3, C3～the 3rd angle；
A4, B4, C4～the 4th angle；
G1, g2, g3, g4～summit.
Detailed description of the invention
Below with the detailed description of each embodiment the example along with graphic explanation, as the reference frame of the present invention.In graphic or description describe, similar or identical part all uses identical figure number.And in the drawings, the shape of embodiment or thickness can expand, and to simplify or convenient to indicate.Furthermore, in graphic, the part of each element will be respectively described explanation, it is notable that the element not illustrating in figure or describing, for having the form known to usually intellectual in art.
It is an object of the invention to provide a kind of liquid crystal indicator, it uses the liquid crystal material mixing chiral agent (Chiral) as the liquid crystal layer of liquid crystal indicator, by the design of pixel electrode and counter electrode pattern, the overall penetrance in viewing area can be promoted and suppress the generation of the dark stricture of vagina of edge optical.
Fig. 1 is the profile of the liquid crystal indicator 500 of one embodiment of the invention.The liquid crystal indicator 500 of one embodiment of the invention can be vertical orientation (VA) type liquid crystal indicator.As it is shown in figure 1, liquid crystal indicator 500 includes first substrate 214 and the second substrate 208 being oppositely arranged and being generally parallel to each other.In an embodiment of the present invention, first substrate 214 can be considered a thin film transistor base plate (TFTsubstrate), and it is comprise a substrate 212, at least one pixel cell.Pixel cell has a pixel electrode 216 and a thin film transistor (TFT) (figure does not show), is arranged in substrate 212.In an embodiment of the present invention, substrate 212 is such as glass substrate.It addition, black matrix" (figure does not show) can be provided with between each pixel cell.
Second substrate 208 can be considered a colored filter substrate (CFsubstrate), it has substrate 204, counter electrode 206 and colored filter (figure does not show), it addition, black matrix" (figure does not show) can be provided with between each colored filter.In an embodiment of the present invention, pixel electrode 216 and counter electrode 206 can be an indium tin oxide transparency electrode, an indium-zinc oxide transparency electrode or an aluminum zinc oxide transparency electrode.In an embodiment of the present invention, pixel electrode 216 and counter electrode 206 are the electrode of patterning, all have least unit pattern.
Liquid crystal indicator 500 more includes one first Polarizer 218 and one second Polarizer 210, and the first Polarizer 218 is be arranged at below first substrate 214, and the second Polarizer 210 is be arranged at above second substrate 208.In an embodiment of the present invention, the polarizing axis of the first Polarizer 218 and the second Polarizer 210 is orthogonal.In an embodiment of the present invention, liquid crystal indicator 500 more includes one first compensation film 222, and between first substrate 214 and the first Polarizer 218, and one second compensates film 224, between second substrate 208 and the second Polarizer 210.
As it is shown in figure 1, the liquid crystal layer 202 of liquid crystal indicator 500 is be arranged between first substrate 214 and second substrate 208.In an embodiment of the present invention, the liquid crystal molecule that liquid crystal layer 202 uses is nematic liquid crystalline material, and it can be minus nematic crystal, also can be eurymeric nematic crystal.And liquid crystal layer 202 is be added with optically active substance, for instance add the chiral agent (chiral) having left-handed characteristic, therefore the liquid crystal molecule of liquid crystal layer 202 can along an axial torsion thus there is optical activity, this axially system be parallel to normal of first substrate 214.
Fig. 2 is the top view of the electrode pattern in a pixel 400 of the liquid crystal indicator of one embodiment of the invention.Pixel 400 is made up of several pixel cells 422, and the pixel electrode pattern of each pixel cell 422 and counter electrode pattern are least unit pattern.In fig. 2, the pixel electrode being positioned at first substrate (thin film transistor base plate) side of liquid crystal indicator and be positioned at the counter electrode of second substrate (colored filter substrate) side and can overlap each other.It is the slit 600 and 608 indicating the slit 406 of pixel electrode and counter electrode in detail in this figure, occupies region with what facilitate display pixel electrode and counter electrode.Therefore, the region that occupies of pixel electrode is the region except slit 406, and the region that occupies of counter electrode is the region except slit 600 and 608.
Fig. 3 a is without when applying electric field between first substrate 214 and second substrate 208, the side view of liquid crystal molecule 203 arrangement of the liquid crystal layer 202 mixing chiral agent of liquid crystal indicator 500, wherein respectively both the polarizing axis direction of the direction of arrow system in the first Polarizer 218 and the second Polarizer 210.When Fig. 2 b is apply electric field between first substrate 214 and second substrate 208, the side view of liquid crystal molecule 203 arrangement of the liquid crystal layer 202 mixing chiral agent of liquid crystal indicator 500.Owing to liquid crystal layer 202 is the optically active substance being added with such as chiral agent (chiral), therefore, as shown in Figure 3 b, liquid crystal molecule 203 axially can reverse gradually from first substrate 214 to second substrate 208 along one thus has optical activity, and stand gradually again after being poured onto level gradually, this is axially the normal being parallel to first substrate 214.Promote with applying electric field value, liquid crystal molecule topple over completely in horizontally arranged scope also with expansion, wherein liquid crystal molecule windup-degree can determine by adjusting chiral agent concentration.If representing thickness of liquid crystal layer with d, and represent chiral agent pitch with p, then liquid crystal molecule torsional capacity can represent by d/p ratio.In an embodiment of the present invention, the liquid crystal molecule torsional capacity (d/p) of the liquid crystal layer 202 mixing chiral agent is about 0.2≤d/p≤0.3, optical path difference (Δ nd) is about 330nm≤Δ nd≤550nm, wherein d is the thickness of the liquid crystal layer 202 mixing chiral agent, p is the pitch mixing chiral agent, and Δ n is the double refractive inde of this liquid crystal layer mixing chiral agent.
Then, utilize the liquid crystal indicator of comparative example, the relation using the pixel electrode of the liquid crystal indicator of the liquid crystal layer composition mixing the chiral agent having left-handed characteristic and counter electrode configurations with the distribution of Optical Dark Solitary Pulse stricture of vagina is described.Fig. 4 a～4c is the top view of the pixel electrode 216a1～216a3 least unit pattern of the liquid crystal indicator of different comparative example.As shown in fig. 4 a, the pixel electrode 216a1 of the pixel cell of a kind of comparative example includes a slit area 108a1 of a main electrode area 102a1 and adjacent main electrode district 102a1.Slit area 108a1 includes each and every one branch sub-electrodes 104 many and each and every one slits 106 many, is separate by slit 106 between any two adjacent branch sub-electrodes 104.As shown in fig. 4 a, above the pixel cell of this comparative example, one first edge 100-1 along a horizontal direction 402 has an intermediate point a1.Main electrode area 102a1 horizontally over 402 first side 110-1 there is intermediate point b1, wherein the intermediate point b1 of the intermediate point a1 and first side 110-1 of the first edge 100-1 is located along on the same straight line (shown in dotted line) of vertical direction 404.Additionally, the pixel cell left of this comparative example vertically 404 one second edge 100-2 there is an intermediate point a2, main electrode area 102a1 left vertically 404 a second side 110-2 there is an intermediate point b2, wherein the intermediate point b2 of the intermediate point a2 and second side 110-2 of the second edge 100-2 is located along on the same straight line (shown in dotted line) of horizontal direction 402.And, below pixel cell, one the 3rd edge 100-3 of 402 has an intermediate point a3 in the horizontal direction, below main electrode area 102a1, one the 3rd side 110-3 of 402 has an intermediate point b3 in the horizontal direction, and wherein the intermediate point b3 of intermediate point a3 and the three side 110-3 of the 3rd edge 100-3 is located along on the same straight line (shown in dotted line) of vertical direction 404.In addition, pixel cell right vertically 404 one the 4th edge 100-4 there is an intermediate point a4, main electrode area 102a1 right vertically 404 a four side 110-4 there is an intermediate point b4, wherein the intermediate point b4 of the intermediate point a4 and four side 110-4 of the 4th edge 100-4 is located along on the same straight line (shown in dotted line) of horizontal direction 402.Angle between slit 106 and horizontal direction 402 and the vertical direction 404 of the slit area 108a1 of the pixel electrode 216a1 of comparative example is all 45 °.As shown in fig. 4 a, the pixel electrode 216a1 of comparative example is symmetrical up and down.
Fig. 4 b～4c is the top view of the pixel electrode 216a2～216a3 least unit pattern of the liquid crystal indicator of other comparative examples.The size for main electrode area 102a2～102a3 that do not exist together between the pixel electrode 216a1 of pixel electrode 216a2～216a3 and Fig. 4 a is different from the main electrode area 102a1, the therefore size of the slit area 108a2～108a3 of the pixel electrode 216a2～216a3 slit area 108a1 also different from pixel electrode 216a1 of pixel electrode 216a1.As illustrated in fig. 4 c, summit g1, g2, g3, g4 of main electrode area 102a3 respectively with the intermediate point a1 of the first edge 100-1, the intermediate point a2 of the second edge 100-2, the 3rd edge 100-3 the intermediate point a4 of intermediate point a3 and the 4th edge 100-4 be positioned on same straight line (shown in dotted line).
Fig. 4 d is the top view of the counter electrode 206a1 least unit pattern of the liquid crystal indicator of comparative example.As shown in figure 4d, the counter electrode 206a1 least unit pattern of comparative example includes a main slit 300 of cross, a main electrode area 302a1 and the slit area 304a1 surrounded by main electrode area 302a1.In this comparative example, the main slit 300 of cross of counter electrode 206a1 be in the horizontal direction 402 and vertical direction 404 extend.As shown in figure 4d, the secondary slit area 304a1 of counter electrode 206a1 be shaped as rhombus.First summit c1 and the three summit c3 of secondary slit area 304a1 all align vertically 404 extend the main slit 300 of cross.The 402 main slit 300 of cross extended in the horizontal direction it addition, second summit c2 and the four summit c4 of secondary slit area 304a all aligns.Angle between slit 308 and horizontal direction 402 and the vertical direction 404 of the secondary slit area 304a1 of the counter electrode 206a1 of comparative example is all 45 °.As shown in figure 4d, the counter electrode 206a1 of comparative example is symmetrical up and down.
Fig. 4 e is the top view of the counter electrode 206a2 least unit pattern of the liquid crystal indicator of other comparative examples.As shown in fig 4e, the border 310e of the slit area 304a2 of the counter electrode 206a2 surrounded by main electrode area 302a2 is generally circular in shape.Or, in other comparative examples, the boundary shape of the counter electrode slit area surrounded by main electrode area in counter electrode is alternatively rhombus.Additionally, in other comparative examples, counter electrode also can only have the main slit of cross.
Fig. 4 f is the viewing area penetrance schematic diagram of the liquid crystal indicator of the comparative example of the pixel electrode 216a1 using Fig. 4 a, 4d to show and counter electrode 206a1 least unit pattern composition.As shown in fig. 4f, the secondary slit area 304a1 of the counter electrode 206a1 that Fig. 4 a, 4d shows is positioned at the main electrode area 102a1 of pixel electrode 216a1 on projecting direction.Can learn that by Fig. 4 f the Optical Dark Solitary Pulse stricture of vagina distribution character of the liquid crystal indicator of the comparative example that the liquid crystal layer of the chiral agent having left-handed characteristic is constituted is added in the symmetrical up and down pixel electrode 216a1 of tool and the collocation of counter electrode 206a1 configurations.As shown in fig. 4f, simulation penetrance (T%) value of the liquid crystal indicator of comparative example is about 27.283%, and the left margin in the right margin in the first quartile district of viewing area and third quadrant district is dark, and the right margin in the left margin in the second quadrant district of viewing area and fourth quadrant district is brighter.
The overall penetrance of the liquid crystal indicator that the liquid crystal layer adding the chiral agent having left-handed characteristic is constituted by the configurations changing pixel electrode and counter electrode, can be promoted further.The top view of pixel electrode 216b, 216c, 216d, 216e least unit pattern of the liquid crystal indicator of Fig. 5 a～5d respectively different embodiments of the invention.The mode expanding pixel electrode main electrode (not having the electrode district of slit) area can be utilized to promote the overall penetrance of liquid crystal indicator.As shown in Figure 5 a, pixel electrode 216a1 compared to comparative example, the main electrode area 102b of the pixel electrode 216b of the present embodiment horizontally over 402 a first side 120-1 there is an intermediate point d1, wherein the intermediate point d1 of first side 120-1 is positioned at the intermediate point a1 left of the first edge 100-1 of pixel cell.Further, as shown in Figure 5 a, centrally located some d1 left of main electrode area 102b has a second side 122-1, and wherein second side 122-1 and first side 120-1 forms one first included angle A 1 in main electrode area 102b, and the first included angle A 1 is be more than or equal to 90 degree.It addition, in the present embodiment, main electrode area 102b left vertically 404 one the 3rd side 120-2 there is an intermediate point d2, wherein the intermediate point d2 of the 3rd side 120-2 is positioned at below the intermediate point a2 of the second edge 100-2 of pixel cell.Further, as shown in Figure 5 a, having a four side 122-2 below centrally located some d2 of main electrode area 102b, wherein four side 122-2 and the three side 120-2 forms one second included angle A 2 in main electrode area 102b, and the second included angle A 2 is be more than or equal to 90 degree.And, in the present embodiment, below main electrode area 102b, one the 5th side 120-3 of 402 has an intermediate point d3 in the horizontal direction, wherein the intermediate point d3 of the 5th side 120-3 is positioned at the intermediate point a3 right of the 3rd edge 100-3 of pixel cell, and centrally located some d3 right of main electrode area 102b has one the 6th side 122-3, wherein the 6th side 122-3 and the five side 120-3 forms one the 3rd included angle A 3 in main electrode area 102b, and the 3rd included angle A 3 is be more than or equal to 90 degree.Additionally, in the present embodiment, main electrode area 102b right vertically 404 a heptalateral limit 120-4 there is an intermediate point d4, wherein the intermediate point d4 of heptalateral limit 120-4 is positioned at above the intermediate point a4 of the 4th edge 100-4 of pixel cell.Further, as shown in Figure 5 a, having one the 8th side 122-4 above centrally located some d4 of main electrode area 102b, wherein the 8th side 122-4 and heptalateral limit 120-4 forms one the 4th included angle A 4 in main electrode area 102b, and the 4th included angle A 4 is be more than or equal to 90 degree.
Fig. 5 b is the top view of the pixel electrode 216c least unit pattern of the liquid crystal indicator of other embodiments of the invention.Compared to the pixel electrode 216a3 shown in Fig. 4 c, first side 124-1 above the main electrode area 102c of the pixel electrode 216c of the present embodiment, the 3rd side 124-2, the 5th side 124-3 and heptalateral limit 124-4 intermediate point e1, e2, e3, e4 lay respectively at the intermediate point a1～a4 left of first, second, third and fourth edge 100-1～100-4 of pixel cell of correspondence, lower section, right and top.And, as shown in Figure 5 b, the first side 124-1 of main electrode area 102c and the first included angle B 1 between the second side 126-1 of 124-1 intermediate point e1 left, first side, the second included angle B 2 between 3rd side 120-2 and the four side 126-2 below the 3rd side 124-2 intermediate point e2, the 4th included angle B 4 between 5th side 124-3 and the 3rd included angle B 3 and heptalateral limit 124-4 and the 8th side 126-4 above the 124-4 intermediate point e4 of heptalateral limit between the 6th side 126-3 of the 5th side 124-3 intermediate point e3 left is all be more than or equal to 90 degree.
Fig. 5 c is the top view of the pixel electrode 216c least unit pattern of the liquid crystal indicator of other embodiments of the invention.Compared to the pixel electrode 216a2 shown in Fig. 4 b, intermediate point f1, f2, f3, f4 of the heptalateral limit 116-4 of first side 116-1 above the main electrode area 102d of the pixel electrode 216d of the present embodiment, the 3rd side 116-2 of left, the 5th side 116-3 of lower section and right lay respectively at the intermediate point a1～a4 left of first, second, third and fourth edge 100-1～100-4 of pixel cell of correspondence, lower section, right and top.And, as shown in Figure 5 c, the first side 116-1 of main electrode area 102d and the first angle C1 between the second side 118-1 of 116-1 intermediate point f1 left, first side, the second angle C2 between 3rd side 116-2 and the four side 118-2 below the 3rd side 116-2 intermediate point f2, the 4th angle C4 between 5th side 116-3 and the 3rd angle C3 and heptalateral limit 116-4 and the 8th side 118-4 above the 116-4 intermediate point f4 of heptalateral limit between the 6th side 118-3 of the 5th side 116-3 intermediate point f3 right is all be more than or equal to 90 degree.
It should be noted that, in other embodiments of the present invention, if the first side of main electrode area of pixel electrode 216b～216d as shown in Fig. 5 a～5c, the 3rd side, the 5th side and heptalateral limit have one of them, wherein two or wherein the point midway of three in the corresponding intermediate point left at first, second, third and fourth edge of pixel cell, lower section, right and top.In the present invention again other embodiments, if main electrode area the first angle to the 4th angle of the pixel electrode 216b～216d as shown in Fig. 5 a～5d have one of them, wherein two or wherein three be more than or equal to 90 degree.
On the other hand, it is also possible to utilize the mode expanding counter electrode main electrode (not having the electrode district of slit) area to promote the overall penetrance of liquid crystal indicator.The top view of the counter electrode 206b least unit pattern of the liquid crystal indicator of Fig. 6 respectively one embodiment of the invention.Pixel electrode 216a1 compared to the comparative example shown in Fig. 4 d, the counter electrode 206b of the present embodiment shown in Fig. 6 in the horizontal direction 402 and the cross main slit 300 that extends of vertical direction 404 counter electrode 206b is divided into four quadrant 206b1～206b4, the shape that secondary slit area 304b at least one quadrant of quadrant 206b1～206b4 (implies that the distributed areas of secondary slit 308) is substantially trapezoidal.It addition, as shown in Figure 6, in other embodiments of the present invention, the trapezoidal secondary slit area 304b at least one quadrant, with the multiple of 90 degree for the cycle, goes out paper direction anticlockwise repeated arrangement with a normal of a cross-point 301 of the main slit 300 of cross.
Table 1
In order to reach by the configurations changing pixel electrode and counter electrode, promote the overall penetrance of the liquid crystal indicator that the liquid crystal layer adding the chiral agent having left-handed characteristic is constituted further, we utilize method for numerical simulation, analyze and calculate the limit field effect that above-mentioned different embodiment pixel electrode/combination of counter electrode pattern produces and the penetrance corresponding to liquid crystal layer adding chiral agent.The viewing area penetrance comparative result of the liquid crystal indicator that table 1 is the pixel electrode of different embodiment and counter electrode pattern is constituted.As shown in Table 1, the first side of main electrode area when the pixel electrode of liquid crystal indicator, 3rd side, the intermediate point on the 5th side and heptalateral limit lays respectively at the first of the pixel cell of correspondence, second, the intermediate point left at the third and fourth edge, lower section, the shape of the secondary slit area in one quadrant of four quadrants that right and top (implying that pixel electrode 216b) or counter electrode are divided by the main slit of cross is substantially trapezoidal, and with the multiple of 90 degree for the cycle, go out paper direction anticlockwise repeated arrangement (implying that counter electrode 206b) with a normal of a cross-point of the main slit of cross and can promote penetrance (refer to embodiment 1 and 3).Compared to counter electrode, the configurations of pixel electrode is bigger to the influence degree of penetrance.More preferably, the liquid crystal indicator with the composition of pixel electrode 216b and counter electrode 206b combination is had the penetrance (refer to embodiment 2) of the best.Therefore, pixel electrode or counter electrode configurations and configuration need to arrange in pairs or groups liquid crystal layer add chiral agent rotation.
Table 2
On the other hand, can by the first angle of the main electrode area of change pixel electrode to the 4th corner dimension in the way of changing expansion pixel electrode main electrode area (not having the electrode district of slit) area, promote the overall penetrance of the liquid crystal indicator that the liquid crystal layer adding the chiral agent having left-handed characteristic is constituted further, we utilize method for numerical simulation, analyze and calculate the limit field effect that above-mentioned different embodiment pixel electrode/combination of counter electrode pattern produces and the penetrance corresponding to liquid crystal layer adding chiral agent.The viewing area penetrance comparative result of the liquid crystal indicator that table 2 is the pixel electrode of different embodiment and counter electrode pattern is constituted.As shown in Table 2, compared to the penetrance of comparative example, when the first angle of the main electrode area of the pixel electrode of liquid crystal indicator to the 4th angle more than 90 degree and less than 180 degree (implying that pixel electrode 216e) or approximates 90 degree of (implying that pixel electrode 216b) Shi Jieke penetrance (refer to embodiment 4,5) is promoted about 1.84% and 3.10%.Particularly when the first angle of the main electrode area of the pixel electrode of liquid crystal indicator to the 4th angle close to right angle (implying that pixel electrode 216b) have the best penetrance (refer to embodiment 5), its relatively comparative example penetrance promote about 3.10%.
The present invention provides a kind of liquid crystal indicator, it uses the liquid crystal material mixing the chiral agent (Chiral) having left-handed characteristic as the liquid crystal layer of liquid crystal indicator, by the design of pixel electrode and counter electrode pattern, suitably to expand comprehensive transparency electrode region.For example, if the main electrode area first side horizontally over of design pixel electrode, left the 3rd side vertically, lower section the 5th side in the horizontal direction and heptalateral limit vertically, right have one of them, the point midway of wherein two, wherein three or four in corresponding first edge horizontally over of pixel cell, left the second edge vertically, lower section the 3rd edge and the right in the horizontal direction intermediate point left at the 4th edge vertically, lower section, right and top.Further, as long as first side and the first angle between the second side of intermediate point left, first side, the second angle between the 3rd side and the four side below the 3rd side intermediate point, the 4th angle between the 5th side and the 3rd angle and heptalateral limit and the 8th side above the intermediate point of heptalateral limit between the 6th side of the 5th side intermediate point right have one of them, wherein two, wherein three or four are be more than or equal to 90 degree.Or, reducing counter electrode time slit and occupy region area, the shape making secondary slit area at least one quadrant of four quadrants that counter electrode divided by the main slit of cross is substantially trapezoidal.Or, the trapezoidal secondary slit area at least one quadrant, with the multiple of 90 degree for the cycle, goes out paper direction anticlockwise repeated arrangement with a normal of a cross-point of the main slit of cross.From the above results, using the liquid crystal material mixing the chiral agent (Chiral) having dextrorotation characteristic as in the embodiment of the liquid crystal layer of liquid crystal indicator, the main electrode area of pixel electrode first side horizontally over, left the 3rd side vertically, as long as lower section the 5th side in the horizontal direction and heptalateral limit vertically, right have one of them, wherein two, wherein the point midway of three or four is in first edge horizontally over of corresponding pixel cell, the second edge vertically, left, the intermediate point right at the 3rd edge and right the 4th edge vertically in the horizontal direction, lower section, top, left and lower section.Further, as long as first side and the first angle between the second side of intermediate point right, first side, the second angle between the 3rd side and the four side above the 3rd side intermediate point, the 4th angle between the 5th side and the 3rd angle and heptalateral limit and the 8th side below the intermediate point of heptalateral limit between the 6th side of the 5th side intermediate point left have one of them, wherein two, wherein three or four are be more than or equal to 90 degree.Or, make the trapezoidal secondary slit area at least one quadrant of counter electrode with the multiple of 90 degree for the cycle, go out paper direction right rotation repeated arrangement with a normal of a cross-point of the main slit of cross.By the design of pixel electrodes and counter electrode pattern, the overall penetrance in viewing area can be promoted and suppress the generation of the dark stricture of vagina of edge optical.
Although the present invention discloses as above with preferred embodiment; so it is not limited to the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little amendment and perfect, therefore protection scope of the present invention is when with being as the criterion that claims define.
Claims (20)
1. a liquid crystal indicator, including:
One first substrate, it has at least one pixel cell, and this pixel cell cording has a pixel electrode, including:
One main electrode area and a slit area；
Above this pixel cell, one first edge along a horizontal direction has one first intermediate point；
Having one second intermediate point along a first side of this horizontal direction above this main electrode area, wherein this second point midway is in this first intermediate point left；And
This main electrode area is positioned at this second intermediate point left and has a second side, this second side is the line adjacent to this first side and the root of multiple branch sub-electrodes of this slit area being positioned at this second intermediate point left, wherein this second side and this first side form one first angle in this main electrode area, and this first angle is be more than or equal to 90 degree；
One second substrate, it has a counter electrode；
One first polaroid, is arranged at below this first substrate；
One second polaroid, is arranged at above this second substrate, and its polarizing axis is vertical each other with the polarizing axis of this first polaroid；And
One liquid crystal layer mixing chiral agent, is arranged between this first substrate and this second substrate.
2. liquid crystal indicator as claimed in claim 1, it is characterized in that, the liquid crystal molecule torsional capacity d/p of this liquid crystal layer mixing chiral agent is 0.2≤d/p≤0.3, optical path difference △ nd is 330nm≤△ nd≤550nm, wherein d is the thickness of this liquid crystal layer mixing chiral agent, p is the pitch mixing chiral agent, and △ n is the double refractive inde of this liquid crystal layer mixing chiral agent.
3. liquid crystal indicator as claimed in claim 1, it is characterized in that, this pixel cell left has one the 3rd intermediate point along one second edge of a vertical direction, this main electrode area left has one the 4th intermediate point along one the 3rd side of this vertical direction, wherein the 4th point midway is below the 3rd intermediate point, and this main electrode area is positioned at below the 3rd intermediate point and has a four side, this four side is the line adjacent to the 3rd side and the root of the multiple branch sub-electrodes being positioned at this slit area below the 4th intermediate point, wherein this four side and the 3rd side form one second angle in this main electrode area, and this second angle is be more than or equal to 90 degree.
4. liquid crystal indicator as claimed in claim 1, it is characterized in that, below this pixel cell, one the 3rd edge along a horizontal direction has one the 5th intermediate point, below this main electrode area, one the 5th side along this horizontal direction has one the 6th intermediate point, wherein the 6th point midway is in the 5th intermediate point right, and this main electrode area is positioned at the 5th intermediate point right and has one the 6th side, 6th side is the line adjacent to the 5th side and the root of multiple branch sub-electrodes of this slit area being positioned at the 6th intermediate point right, wherein the 6th side and the 5th side form one the 3rd angle in this main electrode area, and the 3rd angle be more than or equal to 90 degree.
5. liquid crystal indicator as claimed in claim 1, it is characterized in that, this pixel cell right has one the 7th intermediate point along one the 4th edge of a vertical direction, this main electrode area left has one the 8th intermediate point along a heptalateral limit of this vertical direction, wherein the 8th point midway is above the 7th intermediate point, and this main electrode area is positioned at above the 7th intermediate point and has one the 8th side, 8th side is the line adjacent to this heptalateral limit and the root of the multiple branch sub-electrodes being positioned at this slit area above the 8th intermediate point, wherein the 8th side and this heptalateral limit form one the 4th angle in this main electrode area, and the 4th angle be more than or equal to 90 degree.
6. liquid crystal indicator as claimed in claim 1, it is characterised in that this counter electrode includes:
One main electrode area；And
The one main slit of cross, vertically extending along this horizontal direction and one, and surrounded by this main electrode area.
7. liquid crystal indicator as claimed in claim 6, also includes:
Slit area, is surrounded by this main electrode area, and a central point of this slit area overlaps with a cross-point of the main slit of this cross, wherein this slit area be shaped as rhombus or circle.
8. liquid crystal indicator as claimed in claim 7, it is characterised in that the angle between secondary slit and this horizontal direction and this vertical direction of this slit area of this pixel electrode and this slit area of this counter electrode is all 45 °.
9. liquid crystal indicator as claimed in claim 7, it is characterised in that this slit area of this counter electrode is positioned at this main electrode area of this pixel electrode on projecting direction.
10. a liquid crystal indicator, including:
One first substrate, it has at least one pixel cell, and this pixel cell cording has a pixel electrode；
One second substrate, it has a counter electrode, and this counter electrode includes:
The one main slit of cross, vertically extending along a horizontal direction and one and this counter electrode is divided into four quadrants, being shaped as of a slit area in this quadrant of at least one of which is trapezoidal；
One first polaroid, is arranged at below this first substrate；
One second polaroid, is arranged at above this second substrate, and its polarizing axis is vertical each other with the polarizing axis of this first polaroid；And
One liquid crystal layer mixing chiral agent, is arranged between this first substrate and this second substrate.
11. liquid crystal indicator as claimed in claim 10, it is characterized in that, the liquid crystal molecule torsional capacity d/p of this liquid crystal layer mixing chiral agent is 0.2≤d/p≤0.3, optical path difference △ nd is 330nm≤△ nd≤550nm, wherein d is the thickness of this liquid crystal layer mixing chiral agent, p is the pitch mixing chiral agent, and △ n is the double refractive inde of this liquid crystal layer mixing chiral agent.
12. liquid crystal indicator as claimed in claim 10, it is characterised in that this slit area, with the multiple of 90 degree for the cycle, goes out paper direction anticlockwise repeated arrangement with a normal of a cross-point of the main slit of this cross.
13. liquid crystal indicator as claimed in claim 10, it is characterised in that this pixel electrode includes:
One main electrode area and a slit area；
Above this pixel cell, one first edge along this horizontal direction has one first intermediate point；
Having one second intermediate point along a first side of this horizontal direction above this main electrode area, wherein this second point midway is in this first intermediate point left；
This main electrode area is positioned at this second intermediate point left and has a second side, this second side is the line adjacent to this first side and the root of multiple branch sub-electrodes of this slit area being positioned at this second intermediate point left, wherein this second side and this first side form one first angle in this main electrode area, and this first angle is be more than or equal to 90 degree.
14. liquid crystal indicator as claimed in claim 13, it is characterized in that, this pixel cell left has one the 3rd intermediate point along one second edge of this vertical direction, this main electrode area left has one the 4th intermediate point along one the 3rd side of this vertical direction, wherein the 4th point midway is below the 3rd intermediate point, and this main electrode area is positioned at below the 3rd intermediate point and has a four side, this four side is the line adjacent to the 3rd side and the root of the multiple branch sub-electrodes being positioned at this slit area below the 4th intermediate point, wherein this four side and the 3rd side form one second angle in this main electrode area, and this second angle is be more than or equal to 90 degree.
15. liquid crystal indicator as claimed in claim 13, it is characterized in that, this pixel cell left has one the 5th intermediate point along one the 3rd edge of a horizontal direction, this main electrode area left has one the 6th intermediate point along one the 5th side of this horizontal direction, wherein the 6th point midway is in the 5th intermediate point right, and this main electrode area is positioned at the 5th intermediate point right and has one the 6th side, 6th side is the line adjacent to the 5th side and the root of multiple branch sub-electrodes of this slit area being positioned at the 6th intermediate point right, wherein the 6th side and the 5th side form one the 3rd angle in this main electrode area, and the 3rd angle be more than or equal to 90 degree.
16. liquid crystal indicator as claimed in claim 13, it is characterized in that, this pixel cell right has one the 7th intermediate point along one the 4th edge of a vertical direction, this main electrode area left has one the 8th intermediate point along a heptalateral limit of this vertical direction, wherein the 8th point midway is above the 7th intermediate point, and this main electrode area is positioned at above the 7th intermediate point and has one the 8th side, 8th side is the line adjacent to this heptalateral limit and the root of the multiple branch sub-electrodes being positioned at this slit area above the 8th intermediate point, wherein the 8th side and this heptalateral limit form one the 4th angle in this main electrode area, and the 4th angle be more than or equal to 90 degree.
17. liquid crystal indicator as claimed in claim 10, it is characterised in that this pixel electrode includes:
One main electrode area and a slit area；
Above this pixel cell, one first edge along this horizontal direction has one first intermediate point；
Having one second intermediate point along a first side of this horizontal direction above this main electrode area, wherein this first intermediate point and this second intermediate point are located along on the same straight line of this vertical direction.
18. liquid crystal indicator as claimed in claim 17, it is characterized in that, this pixel cell left has one the 3rd intermediate point along one second edge of a vertical direction, this main electrode area left has one the 4th intermediate point along a second side of this vertical direction, and wherein this first intermediate point and this second intermediate point are located along on the same straight line of this horizontal direction.
19. liquid crystal indicator as claimed in claim 17, it is characterized in that, below this pixel cell, one the 3rd edge along a horizontal direction has one the 5th intermediate point, below this main electrode area, one the 3rd side along this horizontal direction has one the 6th intermediate point, and wherein the 5th intermediate point and the 6th intermediate point are located along on the same straight line of this vertical direction.
20. liquid crystal indicator as claimed in claim 17, it is characterized in that, this pixel cell right has one the 7th intermediate point along one the 4th edge of a vertical direction, this main electrode area right has one the 8th intermediate point along a four side of this vertical direction, and wherein the 7th intermediate point and the 8th intermediate point are located along on the same straight line of this horizontal direction.
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| KR102159683B1 (en) * | 2014-04-29 | 2020-09-25 | 삼성디스플레이 주식회사 | Liquid crystal display |
| TWI564638B (en) * | 2014-07-18 | 2017-01-01 | 友達光電股份有限公司 | Pixel structure of display panel |
| CN104298026B (en) * | 2014-10-24 | 2017-01-11 | 华中科技大学 | Wavefront control chip based on electronic control liquid crystal plane micro lens |
| CN104820320B (en) * | 2015-05-07 | 2018-03-30 | 深圳市华星光电技术有限公司 | Pixel electrode and liquid crystal display panel |
| CN108051963B (en) * | 2018-02-01 | 2023-11-03 | 惠科股份有限公司 | Pixel structure, display panel and display device |
| CN111781779B (en) * | 2019-04-03 | 2023-02-03 | 咸阳彩虹光电科技有限公司 | Liquid crystal display panel and display device |
| CN110824789B (en) * | 2019-10-16 | 2020-10-27 | 深圳市华星光电技术有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
| CN111258123A (en) * | 2020-03-16 | 2020-06-09 | Tcl华星光电技术有限公司 | Display panel |
| CN111413828B (en) * | 2020-04-26 | 2021-06-22 | 苏州华星光电技术有限公司 | Display panel and display device |
| US11086162B1 (en) | 2020-04-26 | 2021-08-10 | Tcl China Star Optoelectronics Technology Co., Ltd. | Display panel and display device |
| CN114488626A (en) * | 2020-10-26 | 2022-05-13 | 群创光电股份有限公司 | Display device |
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| US8537317B2 (en) * | 2009-08-17 | 2013-09-17 | Innolux Corporation | Multi-domain vertical alignment liquid crystal display comprising slanting slits extending along diagonals of a plurality of pixel electrodes wherein the slanting slits have a length of ⅓ the total length of the diagonals of the pixel electrodes |
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