CN101950103A - Liquid crystal display unit - Google Patents
Liquid crystal display unit Download PDFInfo
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- CN101950103A CN101950103A CN 201010282131 CN201010282131A CN101950103A CN 101950103 A CN101950103 A CN 101950103A CN 201010282131 CN201010282131 CN 201010282131 CN 201010282131 A CN201010282131 A CN 201010282131A CN 101950103 A CN101950103 A CN 101950103A
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Abstract
The invention relates to a liquid crystal display unit which comprises a pixel unit and a quasi-isotropic liquid crystal layer with Kerr effect, wherein the pixel unit comprises a plurality of sub-pixel units, each sub-pixel unit is at least provided with a first penetration area and a second penetration area, and each sub-pixel unit comprises a switch assembly, a pixel electrode and a common electrode, wherein the pixel electrode is provided with a plurality of first strip-shaped patterns; the common electrode is provided with a plurality of second strip-shaped patterns, and the first strip-shaped patterns and the second strip-shaped patterns are arranged alternately; in the first penetration area, the width of each first strip-shaped pattern is L1, and the gap between each first strip-shaped pattern and the adjacent second strip-shaped pattern is S1; in the second penetration area, the width of each first strip-shaped pattern is L2, and the gap between each first strip-shaped pattern and the adjacent second strip-shaped pattern is S2; and L1 is not equal to L2 or S1 is not equal to S2 or L1/S1 is not equal to L2/S2.
Description
[technical field]
The invention relates to a kind of liquid crystal display, and particularly have the liquid crystal display of tropisms' such as standard (quasi-isotropic) liquid crystal layer relevant for a kind of employing.
[background technology]
In the development of display, along with the progress of photoelectric technology and semiconductor fabrication, have that high image quality, space utilization efficient are good, the LCD of low consumpting power, advantageous characteristic such as radiationless becomes the main flow in market gradually.The liquid crystal material that more often is used in the LCD at present comprises vertical orientation liquid crystal (vertically aligned LC), twisted nematic liquid crystal (twisted nematic LC), cholesterol liquid crystal etc.Because different liquid crystal has different optics and electrical specification,, need to adopt the active assembly array base plate of different designs, so that the display quality optimization therefore at different types of liquid crystal molecule.
Figure 1A is the voltage-penetrance curve of vertical orientation liquid crystal.Please refer to Figure 1A, when the vertical orientation liquid crystal was subjected to different driven, its penetrance can change to some extent.With the display panels that can show 256 kinds of color ranges is example, and penetrance is the driving voltage V that 100% magnitude of voltage that is corresponded to is defined as GTG L255
L255, and penetrance is the driving voltage V that 0% magnitude of voltage that is corresponded to can be defined as GTG L0
L0By Figure 1A as can be known, as the driving voltage V that puts on liquid crystal
L255When slightly skew being arranged, the penetrance of liquid crystal is not easy to occur very significantly to change, so display panels is when showing GTG L255, and display quality is very stable.
Figure 1B is the voltage-penetrance curve with liquid crystal of Kerr effect.Please refer to Figure 1A and Figure 1B, the liquid crystal (as blue phase liquid crystal) with Kerr effect is different with the optics and the electrical specification of vertical orientation liquid crystal, and the penetrance with liquid crystal of Kerr effect can present the phenomenon of height concussion along with the increase of voltage.With the display panels that can show 256 kinds of color ranges is example, and penetrance is the driving voltage V that 100% magnitude of voltage that is corresponded to is defined as GTG L255
L255, and penetrance is the driving voltage V that 0% magnitude of voltage that is corresponded to can be defined as GTG L0
L0By Figure 1B as can be known, as the driving voltage V that puts on liquid crystal
L255When slightly skew being arranged, very significantly changing just can appear in the penetrance of liquid crystal, so display panels is when showing GTG L255, the display quality instability.
Hold above-mentionedly, how to improve aforementioned display quality problem of unstable, one of emphasis subject under discussion of real field for this reason research and development.
[summary of the invention]
The invention provides a kind of liquid crystal display, its use has tropisms such as standard (quasi-isotropic) liquid crystal layer.
The invention provides a kind of liquid crystal display, it comprises tropism's liquid crystal layers such as picture element unit and standard.The picture element unit comprises a plurality of sub-picture elements unit, and each sub-picture element unit has first penetrating region and second penetrating region at least, and each sub-picture element unit comprises switch module, pixel electrode and common electrode.Pixel electrode and switch module electrically connect, and pixel electrode has a plurality of first strip patterns.Common electrode and pixel electrode are electrically insulated, and common electrode has a plurality of second strip patterns, and first strip pattern and second strip pattern are alternately arranged.In first penetrating region, the width of each first strip pattern is L1, and the gap between each first strip pattern and adjacent second strip pattern is S1.In second penetrating region, the width of each first strip pattern is L2, and the gap between each first strip pattern and adjacent second strip pattern is S2, wherein L1 ≠ L2 or S1 ≠ S2 or L1/S1 ≠ L2/S2.Tropism's liquid crystal layers such as standard are disposed at top, sub-picture element unit, and tropism's liquid crystal layers such as standard when not applying voltage be optics etc. to (optically isotropic), and should standard etc. tropism's liquid crystal layer when being applied in voltage, be optical anisotropy (optically anisotropic).
In one embodiment of this invention, the complex index of refraction of tropism's liquid crystal layers such as standard (Δ n) for example be proportional to pixel electrode and common electrode between electric field (E), perhaps the complex index of refraction (Δ n) of tropism's liquid crystal layer such as standard be proportional to pixel electrode and common electrode between square (E of electric field
2).
In one embodiment of this invention, aforesaid switch module comprises a transistor, and first strip pattern is electrically connected to each other.
In one embodiment of this invention, aforesaid switch module comprises two-transistor, first strip pattern constitutes the two sub-pixel electrodes that are electrically insulated each other, and each transistor electrically connects with a sub-pixel electrode wherein respectively, and part first strip pattern that belongs to same sub-pixel electrode is electrically connected to each other.
In one embodiment of this invention, aforesaid one of them sub-pixel electrode is positioned at first penetrating region, and another sub-pixel electrode is positioned at second penetrating region.
In one embodiment of this invention, the voltage-penetrance curve VT1 of the tropism's liquid crystal layers such as standard in aforesaid first penetrating region and the voltage-penetrance curve VT2 difference that is positioned at tropism's liquid crystal layers such as standard of second penetrating region.
In one embodiment of this invention, the area of aforesaid each first penetrating region is A1, the area of each second penetrating region is A2, and the equivalent voltage-penetrance curve VT=[(VT1 of the tropism's liquid crystal layers such as standard in each sub-picture element unit * A1)+(VT2 * A2)]/(A1+A2).
In one embodiment of this invention, aforesaid L1=L2, and S1 ≠ S2.
In one embodiment of this invention, the area of aforesaid first penetrating region equals the area of second penetrating region in fact.
In one embodiment of this invention, the area of aforesaid first penetrating region is not equal to the area of second penetrating region.
In one embodiment of this invention, tropism's liquid crystal layer such as aforesaid standard is a blue phase liquid crystal.
In one embodiment of this invention, aforesaid each sub-picture element unit can further have one the 3rd penetrating region, in the 3rd penetrating region, the width of each first strip pattern is L3, and the gap between each first strip pattern and adjacent second strip pattern is S3, and L1/S1 ≠ L2/S2 ≠ L3/S3.For example, L1=L2=L3, and S1 ≠ S2 ≠ S3.
In one embodiment of this invention, aforesaid switch module comprises a transistor, and first strip pattern is electrically connected to each other.
In one embodiment of this invention, aforesaid switch module comprises three transistors, first strip pattern constitutes three sub-pixel electrodes that are electrically insulated each other, and each transistor electrically connects with a sub-pixel electrode wherein respectively, and part first strip pattern that belongs to same sub-pixel electrode is electrically connected to each other.
In one embodiment of this invention, the aforesaid voltage-penetrance curve VT1 that is positioned at tropism's liquid crystal layers such as standard of first penetrating region, the voltage-penetrance curve VT2 of tropism's liquid crystal layers such as standard that is positioned at second penetrating region and the voltage-penetrance curve VT3 difference that is positioned at tropism's liquid crystal layers such as standard of the 3rd penetrating region.
In one embodiment of this invention, the area of aforesaid each first penetrating region is A1, the area of each second penetrating region is A2, the area of each the 3rd penetrating region is A3, and the equivalent voltage-penetrance curve VT=[(VT1 of the tropism's liquid crystal layers such as standard in each sub-picture element unit * A1)+(VT2 * A2)+(VT3 * A3)]/(A1+A2+A3).
In one embodiment of this invention, the Ke Er coefficient of tropism's liquid crystal layers such as aforesaid standard is 1e-8, tropism's liquid crystal layers such as standard are suitable for driving by a driving voltage V, driving voltage V position is in a driving voltage interval, and the driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as standard are driven by high driving voltage Vmax, the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit be Tmax 99% the time, the difference of driving voltage V and maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞2.9%.
In one embodiment of this invention, the Ke Er coefficient of tropism's liquid crystal layers such as aforesaid standard is 1e-8, tropism's liquid crystal layers such as standard are suitable for driving by a driving voltage V, driving voltage V position is in a driving voltage interval, and the driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as standard are driven by high driving voltage Vmax, the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit be Tmax 97% the time, the difference of driving voltage V and maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞5.4%.
In one embodiment of this invention, the Ke Er coefficient of tropism's liquid crystal layers such as aforesaid standard is 1e-9, tropism's liquid crystal layers such as standard are suitable for driving by a driving voltage V, driving voltage V position is in a driving voltage interval, and the driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as standard are driven by high driving voltage Vmax, the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit be Tmax 99% the time, the difference of driving voltage V and maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞3.8%.
In one embodiment of this invention, the Ke Er coefficient of tropism's liquid crystal layers such as aforesaid standard is 1e-9, tropism's liquid crystal layers such as standard are suitable for driving by a driving voltage V, driving voltage V position is in a driving voltage interval, and the driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as standard are driven by high driving voltage Vmax, the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit be Tmax 97% the time, the difference of driving voltage V and maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞6.4%.
Width/gap that the present invention passes through to change pixel electrode can make the voltage-breakthrough curve of the liquid crystal in the different penetrating regions difference occur than (L/S), and then changes the equivalent voltage-breakthrough curve of liquid crystal display.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
[description of drawings]
Figure 1A is the voltage-penetrance curve of vertical orientation liquid crystal.
Figure 1B is the voltage-penetrance curve with liquid crystal of Kerr effect.
Fig. 2 is the synoptic diagram of the liquid crystal display of first embodiment of the invention.
Fig. 3 A is the voltage-penetrance curve of the liquid crystal in first penetrating region among Fig. 2 and second penetrating region.
Fig. 3 B is the equivalent voltage-penetrance curve of the tropism's liquid crystal layers such as standard in the sub-picture element unit among Fig. 2.
Fig. 3 C is the enlarged drawing at Vmax place at voltage for equivalent voltage-penetrance curve among Fig. 3 B.
Fig. 4 is the synoptic diagram of the liquid crystal display of second embodiment of the invention.
Fig. 5 and Fig. 6 are the experimental data of other embodiment of the present invention.
[primary clustering symbol description]
100: liquid crystal display
110,110 ': the picture element unit
112,112 ': sub-picture element unit
120: tropism's liquid crystal layers such as standard
SW: switch module
P: pixel electrode
P1: first strip pattern
C: common electrode
P2: second strip pattern
T1: first penetrating region
T2: second penetrating region
T3: the 3rd penetrating region
L1, L2, L3: width
S1, S2, S3: gap
A1, A2, A3: area
VT1, VT2, VT3: voltage-penetrance curve
VT: equivalent voltage-penetrance curve
Vmin: minimum drive voltage
Vmax: high driving voltage
V, V (97%), V (99%): driving voltage
Tmax, T (97%), T (99%): penetrance
Δ V (97%), Δ V (99%): voltage difference
[embodiment]
[first embodiment]
Fig. 2 is the synoptic diagram of the liquid crystal display of first embodiment of the invention.Please refer to Fig. 2, the liquid crystal display 100 of present embodiment comprises tropism's liquid crystal layers 120 such as picture element unit 110 and standard.Picture element unit 110 comprises a plurality of sub-picture elements unit 112, and each sub-picture element unit 112 has the first penetrating region T1 and the second penetrating region T2 at least, and each sub-picture element unit 112 comprises switch module SW, pixel electrode P and common electrode C.Pixel electrode P and switch module SW electrically connect, and pixel electrode P has a plurality of first strip pattern P 1.Common electrode C and pixel electrode P are electrically insulated, and common electrode C has a plurality of second strip pattern P 2, and the first strip pattern P 1 and the second strip pattern P 2 are alternately arranged.In the first penetrating region T1, the width of each first strip pattern P 1 is L1, and the gap between each the first strip pattern P 1 and the adjacent second strip pattern P 2 is S1.In the second penetrating region T2, the width of each first strip pattern P 1 is L2, and the gap between each the first strip pattern P 1 and the adjacent second strip pattern P 2 is S2, and L1 ≠ L2 or S1 ≠ S2 or L1/S1 ≠ L2/S2.Tropism's liquid crystal layers 120 such as standard are disposed at 112 tops, sub-picture element unit, and tropism's liquid crystal layers 120 such as standard when not applying voltage be optics etc. to (optically isotropic), and should standard etc. tropism's liquid crystal layer 120 when being applied in voltage, be optical anisotropy (optically anisotropic).
In the present embodiment, in the first penetrating region T1, the width of each second strip pattern P 2 can equal the width (being that the two is all L1) of the first strip pattern P 1 in fact, and certainly, the width of each second strip pattern P 2 can also be not equal to the width of the first strip pattern P 1.Similarly, in the second penetrating region T2, the width of each second strip pattern P 2 can equal the width (being that the two is all L1) of the first strip pattern P 1 in fact, and certainly, the width of each second strip pattern P 2 can also be not equal to the width of the first strip pattern P 1.For example, in the first penetrating region T1, if the width of the first strip pattern P 1 is about 3 microns, then the width of the second strip pattern P 2 can be in fact between 2 microns to 5 microns; In the second penetrating region T2, if the width of the first strip pattern P 1 is about 3 microns, then the width of the second strip pattern P 2 can be in fact between 2 microns to 5 microns.Certainly, the design of the width of the first strip pattern P 1 and the second strip pattern P 2 is not exceeded with aforesaid numerical value, and the width that present embodiment can see through the first strip pattern P 1 is adjusted the first penetrating region T1 and interior voltage-penetrance curve VT1, the VT2 of the second penetrating region T2 with the relation between the width of the second strip pattern P 2.
For example, the complex index of refraction of tropism's liquid crystal layers 120 such as standard (Δ n) is proportional to the electric field (E) between pixel electrode P and the common electrode C in fact, and perhaps the complex index of refraction (Δ n) of tropism's liquid crystal layer 120 such as standard is proportional to square (E of the electric field between pixel electrode P and the common electrode C in fact
2).In the present embodiment, tropism's liquid crystal layer 120 such as standard for example is blue phase liquid crystal or other liquid crystal material.
In the present embodiment, the switch module SW in each sub-picture element unit 112 for example is a transistor, and this crystal piping and the first strip pattern P 1 electrically connect.In other words, first penetrating region T1 in the sub-picture element unit 112 and the first strip pattern P 1 among the second penetrating region T2 all electrically connect with same transistor, and have identical voltage.Yet the present invention does not limit the kenel of employed transistorized quantity and pixel electrode P.
In other feasible embodiment, the first strip pattern P 1 that part is positioned at the first penetrating region T1 constitutes a sub-pixel electrode, and all the other first strip pattern P 1 that are positioned at the second penetrating region T2 constitute another sub-pixel electrode, and the two sub-pixel electrodes that lay respectively in the first penetrating region T1 and the second penetrating region T2 are electrically insulated each other.For indivedual two sub-pixel electrodes that are positioned at the first penetrating region T1 and the second penetrating region T2 that drive, switch module SW in each sub-picture element unit 112 comprises two-transistor, wherein a transistor AND gate is positioned at the sub-pixel electrode electric connection of the first penetrating region T1, and another transistor then electrically connects with the sub-pixel electrode that is positioned at the second penetrating region T2.Hold above-mentionedly, the present invention does not limit the quantity of each sub-picture element unit 112 neutron pixel electrode, and this field has knows that usually the knowledgeable can be according to the actual demand of product, and the layout (layout) of antithetical phrase picture element unit 112 is done suitable change.
In the present embodiment, in the first penetrating region T1 and the second penetrating region T2, the first strip pattern P 1 has approximate or identical width with the second strip pattern P 2, promptly
In addition, in the first penetrating region T1 and the second penetrating region T2, the gap between the first strip pattern P 1 and the adjacent second strip pattern P 2 is inequality, i.e. S1 ≠ S2.For example, L1, L2 are about 3 microns, and S1 is about 3 microns, and S2 is about 5 microns.In other words, the L1/S1 in the present embodiment is about 3 microns/3 microns, and L2/S2 is about 3 microns/5 microns.Yet, the present invention does not limit the first penetrating region T1 must have identical width with the first strip pattern P 1 and the second strip pattern P 2 among the second penetrating region T2, any L1, L2, S1, S2 that satisfies the inequality of L1 ≠ L2 or S1 ≠ S2 or L1/S1 ≠ L2/S2 all should belong to the category that the present invention desires to contain.For example, when L1/S1 is about 3 microns/3 microns, and L2/S2 is when being about 6 microns/6 microns, though L1/S1=L2/S2 but still satisfies L1 ≠ L2 or S1 ≠ S2, so it still is category that the present invention desired to contain.In brief, as long as the collocation of the collocation of L1 and S1 and L2 and S2 difference to some extent all should belong to the category that the present invention desires to contain.
Fig. 3 A is the voltage-penetrance curve of the liquid crystal in first penetrating region among Fig. 2 and second penetrating region, and Fig. 3 B is the equivalent voltage-penetrance curve of the tropism's liquid crystal layers such as standard in the sub-picture element unit among Fig. 2.Please refer to Fig. 2 and Fig. 3 A, when L1/S1 is about 3 microns/3 microns, and L2/S2 is when being about 3 microns/5 microns, and the voltage-penetrance curve VT1 of the tropism's liquid crystal layers 120 such as standard in the first penetrating region T1 and the voltage-penetrance curve VT2 of the tropism's liquid crystal layers 120 such as standard in the second penetrating region T2 are obviously different.Because first penetrating region T1 in each sub-picture element unit 112 and the area of the second penetrating region T2 are very little, human eye vision is difficult to clearly pick out the first penetrating region T1 and the second penetrating region T2, therefore for the user, the shown GTG in each sub-picture element unit 112 is relevant with equivalent voltage-penetrance curve VT (being illustrated in Fig. 3 B), the equivalent voltage-penetrance curve VT of the tropism's liquid crystal layers such as standard in each sub-picture element unit 112 then with voltage-penetrance curve VT1, voltage-penetrance curve VT2, the area A 1 of the first penetrating region T1 in each sub-picture element unit 112, the area A 2 of the second penetrating region T2 in each sub-picture element unit 112 is relevant.In detail, the equivalent voltage-penetrance curve VT of the tropism's liquid crystal layers such as standard in each sub-picture element unit 112 can calculate and get via following relationship formula (1).
VT＝[(VT1×A1)+(VT2×A2)]/(A1+A2)…(1)
When having of the first penetrating region T1 in each sub-picture element unit 112 and the second penetrating region T2 during approximate or equal area (
), the equivalent voltage-penetrance curve VT of the tropism's liquid crystal layers such as standard in the sub-picture element unit 112 is shown in Fig. 3 B.Equivalent voltage from Fig. 3 B-penetrance curve VT as can be known, when being subjected to voltage Vmax, tropism's liquid crystal layers such as standard drive, but when the driving voltage Vmax that puts on tropism's liquid crystal layers such as standard has skew slightly, very significantly changing can not appear in the penetrance of tropism's liquid crystal layers such as standard, so the liquid crystal display of present embodiment has very stable display quality.
It should be noted that the area A 1 of the first penetrating region T1 that the present invention does not limit must equal the area A 2 of the second penetrating region T2.This field has knows that usually the knowledgeable can be according to the actual demand of product, and the area of the first penetrating region T1 and the second penetrating region T2 is carried out suitable adjustment, to obtain required equivalent voltage-penetrance curve VT.
Fig. 3 C is the enlarged drawing at Vmax place at voltage for equivalent voltage-penetrance curve among Fig. 3 B.Please refer to Fig. 3 B and Fig. 3 C, with the Ke Er coefficient is that tropism's liquid crystal layers such as standard of 1e-8 are example, tropism's liquid crystal layers such as standard are suitable for driving by a driving voltage V, driving voltage V position is in a driving voltage interval, and the driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as standard by a driven, when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, this driving voltage then is defined as Vmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is about 99% (being T (99%)) of Tmax, driving voltage V (99%) is about Δ V (99%) with the difference of maximum drive voltage Vmax, and (Δ V (99%)/Vmax) is approximately greater than 2.9%.In addition, when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is about 97% (being T (97%)) of Tmax, driving voltage V (97%) is about Δ V (97%) with the difference of maximum drive voltage Vmax, and (Δ V (97%)/Vmax) is approximately greater than 5.4%.
With the Ke Er coefficient is that tropism's liquid crystal layers such as standard of 1e-9 are example, tropism's liquid crystal layers such as standard are suitable for driving by a driving voltage V, driving voltage V position is in a driving voltage interval, and the driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as standard are driven by a driving voltage, when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, this driving voltage then is defined as Vmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is about 99% (being T (99%)) of Tmax, driving voltage V (99%) is about Δ V (99%) with the difference of maximum drive voltage Vmax, and (Δ V (99%)/Vmax) is approximately greater than 3.8%.In addition, when tropism's liquid crystal layers such as standard are driven by high driving voltage Vmax, the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as standard in each sub-picture element unit is about 97% (being T (97%)) of Tmax, driving voltage V (97%) is about Δ V (97%) with the difference of maximum drive voltage Vmax, and (Δ V (97%)/Vmax) is approximately greater than 6.4%.
[second embodiment]
Fig. 4 is the synoptic diagram of the liquid crystal display of second embodiment of the invention.Please refer to Fig. 2 and Fig. 4, the picture element unit 110 ' of present embodiment and the picture element unit 110 of first embodiment are similar, only the two main difference is: each of present embodiment picture element unit 112 ' comprises the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3, in the 3rd penetrating region T3, the width of each first strip pattern P 1 is L3, and the gap between each the first strip pattern P 1 and the adjacent second strip pattern P 2 is S3, and L1 ≠ L2 ≠ L3 or S1 ≠ S2 ≠ S3 or L1/S1 ≠ L2/S2 ≠ L3/S3.In the 3rd penetrating region T3, the width of each second strip pattern P 2 can equal the width (being that the two is all L3) of the first strip pattern P 1 in fact, and certainly, the width of each second strip pattern P 2 can also be not equal to the width of the first strip pattern P 1.
In the present embodiment, the switch module SW in each sub-picture element unit 112 ' for example is a transistor, and this crystal piping and the first strip pattern P 1 electrically connect.In other words, the first strip pattern P 1 among the first penetrating region T1 in the sub-picture element unit 112, the second penetrating region T2 and the 3rd penetrating region T3 all electrically connects with same transistor, and has identical voltage.Yet the present invention does not limit the kenel of employed transistorized quantity and pixel electrode P.
In other feasible embodiment, the first strip pattern P 1 that part is positioned at the first penetrating region T1 constitutes a sub-pixel electrode, the first strip pattern P 1 that part is positioned at the second penetrating region T2 constitutes second sub-pixel electrode, and all the other first strip pattern P 1 that are positioned at the 3rd penetrating region T3 constitute the 3rd sub-pixel electrode, and three sub-pixel electrodes that lay respectively in the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3 are electrically insulated each other.For indivedual three sub-pixel electrodes that are positioned at the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3 that drive, switch module SW in each sub-picture element unit 112 ' comprises three transistors, wherein a transistor AND gate is positioned at the sub-pixel electrode electric connection of the first penetrating region T1, second transistor AND gate is positioned at the sub-pixel electrode electric connection of the second penetrating region T2, and the 3rd transistor then electrically connects with the sub-pixel electrode that is positioned at the 3rd penetrating region T3.Hold above-mentionedly, the present invention does not limit the quantity of each sub-picture element unit 112 ' neutron pixel electrode, and this field has knows that usually the knowledgeable can be according to the actual demand of product, and the layout (layout) of antithetical phrase picture element unit 112 ' is done suitable change.
In the present embodiment, in the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3, the first strip pattern P 1 has approximate in fact or identical width with the second strip pattern P 2, promptly
In addition, in the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3, the gap between the first strip pattern P 1 and the adjacent second strip pattern P 2 is inequality, i.e. L1/S1 ≠ L2/S2 ≠ L3/S3.For example, L1, L2, L3 are about 3 microns, and S1 is about 3 microns, and S2=is about 4 microns, and S3 is about 5 microns.In other words, the L1/S1 in the present embodiment is about 3 microns/3 microns, and L2/S2 is about 3 microns/4 microns, and L3/S3 is about 3 microns/5 microns.Yet, the first strip pattern P 1 that the present invention does not limit among the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3 must have in fact or identical width with the second strip pattern P 2, any L1, L2, S1, S2, L3, S3 that satisfies the inequality of L1/S1 ≠ L2/S2 ≠ L3/S3 all should belong to the category that the present invention desires to contain.
When L1/S1 ≠ L2/S2 ≠ L3/S3, the voltage-penetrance curve VT2 of the tropism's liquid crystal layers 120 such as standard in voltage-penetrance curve VT1, the second penetrating region T2 of the tropism's liquid crystal layers 120 such as standard in the first penetrating region T1 and voltage-penetrance curve VT3 of the tropism's liquid crystal layers 120 such as standard in the 3rd penetrating region T3 can be obviously different.Because the first penetrating region T1 in each sub-picture element unit 112 ', the area of the second penetrating region T2 and the 3rd penetrating region T3 is very little, human eye vision is difficult to clearly pick out the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3, therefore for the user, VT is relevant with equivalent voltage-penetrance curve for each sub-picture element unit 112 ' shown GTG, the equivalent voltage-penetrance curve VT of the tropism's liquid crystal layers such as standard in each sub-picture element unit 112 ' then with voltage-penetrance curve VT1, voltage-penetrance curve VT2, voltage-penetrance curve VT3, the area A 1 of the first penetrating region T1 in each sub-picture element unit 112 ', the area A 2 of the second penetrating region T2 in each sub-picture element unit 112 ', the area A 3 of the 3rd penetrating region T3 in each sub-picture element unit 112 ' is relevant.Detailed speech, the equivalent voltage-penetrance curve VT of the tropism's liquid crystal layers such as standard in each sub-picture element unit 112 ' can calculate and get via following relationship formula (2).
VT＝[(VT1×A1)+(VT2×A2)+(VT3×A3)]/(A1+A2+A3)…(2)
It should be noted that the first penetrating region T1, the second penetrating region T2 that the present invention does not limit and the area ratio of the 3rd penetrating region T3.This field has knows that usually the knowledgeable can be according to the actual demand of product, and the area ratio of the first penetrating region T1, the second penetrating region T2 and the 3rd penetrating region T3 is carried out suitable adjustment, to obtain required equivalent voltage-penetrance curve VT.
Width/gap that the present invention passes through to change pixel electrode can make the voltage-breakthrough curve of the liquid crystal in the different penetrating regions difference occur than (L/S), and then changes the equivalent voltage-breakthrough curve of liquid crystal display.
[experimental example]
Fig. 5 and Fig. 6 are the experimental data of other embodiment of the present invention.Please refer to Fig. 5, with the Ke Er coefficient is that tropism's liquid crystal layers such as standard of 1e-8 are example, and when the width/gap ratio of pixel electrode was about 3 microns/3 microns (being LS33), maximum drive voltage Vmax was about 23 volts, Δ V (99%)/Vmax is 1.70%, and Δ V (97%)/Vmax is about 4.80%; When the width/gap ratio of pixel electrode was about 3 microns/4 microns (being LS34), maximum drive voltage Vmax was about 28 volts, and Δ V (99%)/Vmax is about 2.10%, and Δ V (97%)/Vmax is about 4.60%; When the width/gap ratio of pixel electrode was about 3 microns/5 microns (being LS35), maximum drive voltage Vmax was about 31 volts, and Δ V (99%)/Vmax is about 2.30%, and Δ V (97%)/Vmax is about 4.80%; When the width/gap ratio of pixel electrode was about 3 microns/6 microns (being LS36), maximum drive voltage Vmax was about 35 volts, and Δ V (99%)/Vmax is about 2.90%, and Δ V (97%)/Vmax is about 5.40%.Clearly, when width/gap when being fixed as 3 microns/3 microns (they being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) or 3 microns/6 microns (being LS36) approximately, its V (99%)/Vmax all is less than about 2.90%, and Δ V (97%)/Vmax all is less than about 5.40%.Clearly, when the strip pattern in the pixel electrode only have single-width/gap than the time, the penetrance of tropism's liquid crystal layers such as standard is very responsive for the skew of voltage Vmax.
In a plurality of embodiment of the present invention, when the area ratio of each penetrating region with 3 microns/3 microns (being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) and 3 microns/6 microns (being LS36) is about 1: 1: 4: in the time of 0, its maximum drive voltage Vmax is about 30 volts, V (99%)/Vmax is about 4.87%, and Δ V (97%)/Vmax is about 8.10%; When the area ratio of each penetrating region with 3 microns/3 microns (being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) and 3 microns/6 microns (being LS36) is about 1: 0: 2.3: in the time of 0.3, its maximum drive voltage Vmax is about 34 volts, V (99%)/Vmax is about 15.47%, and Δ V (97%)/Vmax is about 19.71%; When the area ratio of each penetrating region with 3 microns/3 microns (being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) and 3 microns/6 microns (being LS36) is about 1: 0.4: 2.6: in the time of 0.2, its maximum drive voltage Vmax is about 30 volts, V (99%)/Vmax is about 6.30%, and Δ V (97%)/Vmax is about 9.80%.Clearly, when the strip pattern in the pixel electrode have multiple width/gap than the time, the penetrance of tropism's liquid crystal layers such as standard is more insensitive for the skew of voltage Vmax.
Please refer to Fig. 6, with the Ke Er coefficient is that tropism's liquid crystal layers such as standard of 1e-9 are example, and when the width/gap ratio of pixel electrode was 3 microns/3 microns (being LS33), maximum drive voltage Vmax was about 74 volts, Δ V (99%)/Vmax is about 3.40%, and Δ V (97%)/Vmax is about 5.90%; When the width/gap ratio of pixel electrode was about 3 microns/4 microns (being LS34), maximum drive voltage Vmax was about 90 volts, and Δ V (99%)/Vmax is about 3.80%, and Δ V (97%)/Vmax is about 6.40%; When the width/gap ratio of pixel electrode was about 3 microns/5 microns (being LS35), maximum drive voltage Vmax was about 99 volts, and Δ V (99%)/Vmax is about 3.20%, and Δ V (97%)/Vmax is about 5.90%; When the width/gap ratio of pixel electrode was about 3 microns/6 microns (being LS36), maximum drive voltage Vmax was about 111 volts, and Δ V (99%)/Vmax is about 3.10%, and Δ V (97%)/Vmax is about 5.70%.Clearly, when width/gap when being fixed as 3 microns/3 microns (they being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) or 3 microns/6 microns (being LS36) approximately, its V (99%)/Vmax all is less than about 3.8%, and Δ V (97%)/Vmax all is less than about 6.40%.Clearly, when the strip pattern in the pixel electrode only have single-width/gap than the time, the penetrance of tropism's liquid crystal layers such as standard is very responsive for the skew of voltage Vmax.
In a plurality of embodiment of the present invention, when the area ratio of each penetrating region with 3 microns/3 microns (being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) and 3 microns/6 microns (being LS36) is about 2: 0: 5: in the time of 0.4, its maximum drive voltage Vmax is about 96 volts, V (99%)/Vmax is about 6.70%, and Δ V (97%)/Vmax is about 10.50%; When the area ratio of each penetrating region with 3 microns/3 microns (being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) and 3 microns/6 microns (being LS36) is about 2: 3: 3: in the time of 2.2, its maximum drive voltage Vmax is about 109 volts, V (99%)/Vmax is about 14.00%, and Δ V (97%)/Vmax is about 18.90%; When the area ratio of each penetrating region with 3 microns/3 microns (being LS33), 3 microns/4 microns (being LS34), 3 microns/5 microns (being LS35) and 3 microns/6 microns (being LS36) is about 2: 0.2: 4.2: in the time of 0.8, its maximum drive voltage Vmax is about 110 volts, V (99%)/Vmax is about 18.40%, and Δ V (97%)/Vmax is about 22.00%.Clearly, when the strip pattern in the pixel electrode have multiple width/gap than the time, the penetrance of tropism's liquid crystal layers such as standard is more insensitive for the skew of voltage Vmax.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (25)
1. liquid crystal display comprises:
One picture element unit comprises a plurality of sub-picture elements unit, and respectively this sub-picture element unit has one first penetrating region and one second penetrating region at least, and respectively this sub-picture element unit comprises:
One switch module;
One pixel electrode electrically connects with this switch module, and this pixel electrode has a plurality of first strip patterns;
One common electrode, be electrically insulated with this pixel electrode, this common electrode has a plurality of second strip patterns, and described first strip pattern and described second strip pattern are alternately arranged, in this first penetrating region, respectively the width of this first strip pattern is L1, and respectively the gap between this first strip pattern and adjacent second strip pattern is S1, in this second penetrating region, respectively the width of this first strip pattern is L2, and respectively the gap between this first strip pattern and adjacent second strip pattern is S2, wherein L1 ≠ L2 or S1 ≠ S2 or L1/S1 ≠ L2/S2; And
Surely wait tropism's liquid crystal layer, be disposed at described sub-picture element unit top, tropism's liquid crystal layers such as this standard be optics etc. when not applying voltage to, and should standard etc. tropism's liquid crystal layer when being applied in voltage, be the optical anisotropy.
2. liquid crystal display according to claim 1 is characterized in that this switch module comprises a transistor, and described first strip pattern is electrically connected to each other.
3. liquid crystal display according to claim 1, it is characterized in that, this switch module comprises two-transistor, described first strip pattern constitutes the two sub-pixel electrodes that are electrically insulated each other, and respectively this transistor electrically connects with a sub-pixel electrode wherein respectively, and part first strip pattern that belongs to same sub-pixel electrode is electrically connected to each other.
4. liquid crystal display according to claim 3 is characterized in that, a sub-pixel electrode is positioned at this first penetrating region, and another sub-pixel electrode is positioned at this second penetrating region.
5. liquid crystal display according to claim 1, it is characterized in that, respectively this sub-picture element unit has more one the 3rd penetrating region, in the 3rd penetrating region, respectively this first strip pattern is L3 with the width of this second strip pattern respectively, the and respectively gap between this first strip pattern and adjacent second strip pattern is S3, and L1/S1 ≠ L2/S2 ≠ L3/S3.
6. liquid crystal display according to claim 5 is characterized in that this switch module comprises a transistor, and described first strip pattern is electrically connected to each other.
7. liquid crystal display according to claim 5, it is characterized in that, this switch module comprises three transistors, described first strip pattern constitutes three sub-pixel electrodes that are electrically insulated each other, and respectively this transistor electrically connects with a sub-pixel electrode wherein respectively, and part first strip pattern that belongs to same sub-pixel electrode is electrically connected to each other.
8. liquid crystal display according to claim 5 is characterized in that, L1=L2=L3, and S1 ≠ S2 ≠ S3.
9. liquid crystal display according to claim 5, it is characterized in that, be positioned at the voltage-penetrance curve VT1 of tropism's liquid crystal layers such as this standard of this first penetrating region, the voltage-penetrance curve VT2 of tropism's liquid crystal layers such as this standard that is positioned at this second penetrating region and the voltage-penetrance curve VT3 difference that is positioned at tropism's liquid crystal layers such as this standard of the 3rd penetrating region.
10. liquid crystal display according to claim 9, it is characterized in that, respectively the area of this first penetrating region is A1, respectively the area of this second penetrating region is A2, respectively the area of the 3rd penetrating region is A3, and respectively equivalent voltage-penetrance curve the VT=[(VT1 of the tropism's liquid crystal layers such as this standard in this sub-picture element unit * A1)+(VT2 * A2)+(VT3 * A3)]/(A1+A2+A3).
11. liquid crystal display according to claim 5, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-8, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage V position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 99% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞2.9%.
12. liquid crystal display according to claim 5, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-8, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage V position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 97% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞5.4%.
13. liquid crystal display according to claim 5, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-9, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage V position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 99% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞3.8%.
14. liquid crystal display according to claim 5, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-9, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage position V is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 97% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞6.4%.
15. liquid crystal display according to claim 1 is characterized in that, L1=L2, and S1 ≠ S2.
16. liquid crystal display according to claim 1 is characterized in that, the area of this first penetrating region equals the area of this second penetrating region in fact.
17. liquid crystal display according to claim 1 is characterized in that, the area of this first penetrating region is not equal to the area of this second penetrating region.
18. liquid crystal display according to claim 1 is characterized in that, tropism's liquid crystal layers such as this standard are blue phase liquid crystal.
19. liquid crystal display according to claim 1, it is characterized in that, be positioned at the voltage-penetrance curve VT1 of tropism's liquid crystal layers such as this standard of this first penetrating region and the voltage-penetrance curve VT2 difference that is positioned at tropism's liquid crystal layers such as this standard of this second penetrating region.
20. liquid crystal display according to claim 19, it is characterized in that, respectively the area of this first penetrating region is A1, respectively the area of this second penetrating region is A2, and respectively equivalent voltage-penetrance curve the VT=[(VT1 of the tropism's liquid crystal layers such as this standard in this sub-picture element unit * A1)+(VT2 * A2)]/(A1+A2).
21. liquid crystal display according to claim 1, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-8, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 99% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞2.9%.
22. liquid crystal display according to claim 1, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-8, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 97% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞5.4%.
23. liquid crystal display according to claim 1, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-9, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 99% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞3.8%.
24. liquid crystal display according to claim 1, it is characterized in that, the Ke Er coefficient of tropism's liquid crystal layers such as this standard is 1e-9, tropism's liquid crystal layers such as this standard are suitable for driving by a driving voltage V, this driving voltage position is in a driving voltage interval, and this driving voltage interval is defined by a minimum drive voltage Vmin and high driving voltage Vmax, when tropism's liquid crystal layers such as this standard are driven by this high driving voltage Vmax, respectively the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit is Tmax, and when the penetrance of the tropism's liquid crystal layers such as this standard in this sub-picture element unit respectively be Tmax 97% the time, the difference of this driving voltage V and this maximum drive voltage Vmax is Δ V, and (Δ V/Vmax)＞6.4%.
25. liquid crystal display according to claim 1, it is characterized in that, the complex index of refraction (Δ n) of tropism's liquid crystal layers such as tropism's standard such as this standard be proportional to this pixel electrode and this common electrode between electric field (E), or should standard etc. the complex index of refraction (Δ n) of tropism's liquid crystal layer be proportional to this pixel electrode and this common electrode between square (E of electric field
2).
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