CN103926720A - Liquid crystal display panel - Google Patents
Liquid crystal display panel Download PDFInfo
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- CN103926720A CN103926720A CN201310012645.2A CN201310012645A CN103926720A CN 103926720 A CN103926720 A CN 103926720A CN 201310012645 A CN201310012645 A CN 201310012645A CN 103926720 A CN103926720 A CN 103926720A
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Abstract
An embodiment of the invention discloses a liquid crystal display panel. Gray level can be increased, and the display quality of the liquid crystal display panel is improved. The liquid crystal display panel comprises a backlight module, a lower polarizer, an upper polarizer, a first liquid crystal layer, at least one second liquid crystal layer and at least one driving circuit, wherein the first liquid crystal layer is positioned between the lower polarizer and the upper polarizer, the second liquid crystal layers are positioned between the lower polarizer and the upper polarizer, and the driving circuits are used for driving the second liquid crystal layers. The liquid crystal display panel is applicable to liquid crystal display technology.
Description
Technical field
The present invention relates to lcd technology, relate in particular to display panels.
Background technology
Along with scientific and technological development, lcd technology is widespread use.Generally will drive signal to be divided into the signal of different steps, the signal by different steps produces different energy and drives liquid crystal molecule, and then makes pixel show the effect of GTG.GTG represented a pixel by the most secretly to the level of different brightness the brightest, level is more, the picture effect that can present is also just finer and smoother.
Make the picture effect that presents more fine and smooth, will make to drive signal to be divided into more step, produce more accurate energy and drive liquid crystal molecule, make liquid crystal molecule show more GTG.
Produce more GTG, can be by making the driving signal that is added on liquid crystal layer be divided into more step, or make meticulousr realization of liquid crystal molecule in liquid crystal layer.But the Technology Need of this two aspect improves the driving circuit of liquid crystal layer or liquid crystal material, be all difficult for realizing.Therefore, be necessary to provide a kind of technology based on existing driving signalling technique and the more GTGs of liquid crystal material technology generation.
Summary of the invention
Embodiments of the invention provide a kind of display panels, can increase the grey exponent number of pixel, improve the display quality of display panels.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, the embodiment of the present invention provides a kind of display panels, described display panels comprises: backlight module, lower polaroid, upper polaroid and the first liquid crystal layer between lower polaroid and upper polaroid, it is characterized in that, and described display panels also comprises:
At least one deck the second liquid crystal layer between described lower polaroid and upper polaroid;
And for driving at least at least one driving circuit of one deck the second liquid crystal layer.
Second aspect, the embodiment of the present invention provides a kind of liquid crystal indicator, and described liquid crystal indicator comprises the display panels of described first aspect.
The embodiment of the present invention provides a kind of display panels, described display panels comprises: backlight module, lower polaroid, upper polaroid, at the first liquid crystal layer between lower polaroid and upper polaroid and at least one deck the second liquid crystal layer between described lower polaroid and upper polaroid, and for driving at least at least one driving circuit of one deck the second liquid crystal layer.By described the second liquid crystal layer, increased grey exponent number, improved the display quality of display panels.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of a kind of display panels that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the another kind of display panels that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the another kind of display panels that Fig. 3 provides for the embodiment of the present invention;
The structural representation of the another kind of display panels that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the another kind of display panels that Fig. 5 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
One embodiment of the invention provides a kind of display panels, as shown in Figure 1, described display panels comprises: backlight module 10, lower polaroid 11, upper polaroid 12, at the first liquid crystal layer 13 between lower polaroid and upper polaroid and the second liquid crystal layer 14 of at least one deck between described lower polaroid and upper polaroid.Suspension points in Fig. 1 represents multilayer the second liquid crystal layer.
Described display panels also comprises for driving at least at least one driving circuit of one deck the second liquid crystal layer.
In the schematic diagram of display panels of the present invention, curve between the liquid crystal layer adjacent with lower polaroid 11 represents other layers such as glass substrate, color film, black matrix and driving circuit, and the curve between the liquid crystal layer adjacent with upper polaroid 12 represents other layers such as glass substrate.Because above technology is technology well-known to those skilled in the art, therefore, the embodiment of the present invention no longer illustrates at this.
In prior art, liquid crystal modulation is the driving signal of the different brackets that produces by driving circuit, make liquid crystal molecule rotate different angles, and then make the light that sees through liquid crystal layer rotate different angles, to seeing through the light of display panels, carry out liquid crystal modulation, make the pixel of display panels show different GTGs.The progression of the driving signal producing due to driving circuit is fixed, and therefore, display panels makes to see through the angle sequence that the light of display panels can rotate to be determined, the grey exponent number that the pixel of display panels can show then is also determined.
In the present invention, the driving circuit of every layer of liquid crystal layer does not improve in manufacture craft, therefore, produce more GTG, just need to make the light that sees through display panels can rotate more angle sequence, and then the grey exponent number that the pixel of display panels can be shown is more.It is certain that the display panels of individual layer liquid crystal layer makes to see through the angle sequence that the light of display panels can rotate.Make the light that sees through display panels can rotate more angle sequence, will make the liquid crystal layer of display panels can rotate more angle.In the situation that do not change the driving circuit of every layer of liquid crystal layer, can be by increasing the number of plies of liquid crystal layer, making to see through the angle sequence that the light of display panels can rotate increases, and then making the pixel of display panels can show more GTG, the image that display panels shows is more fine and smooth.
Concrete, between upper polaroid and lower polaroid, be also provided with at least one deck the second liquid crystal layer.At the first liquid crystal layer, the polarized light seeing through after lower polaroid is modulated, this polarized light is rotated after the first angle [alpha] 1, when polarized light process n layer the second liquid crystal layer, described n layer the second liquid crystal layer modulated this polarized light, rotate successively the second angle beta 1, the 3rd angle beta 2 ..., n+1 angle beta n.The angle that described the first liquid crystal layer and n layer the second liquid crystal layer are modulated rotation to described polarized light is α 1+ β 1+ β 2+...+ β n.
Through the first liquid crystal layer and at least modulation of one deck the second liquid crystal layer, make to see through angle sequence that the polarized light of lower polaroid can rotate than in prior art, the angle sequence that described polarized light can rotate increases, and therefore, makes the pixel of display panels can show more GTG.
Due to the rotation of liquid crystal molecule, each some variation to rear a kind of color by front a kind of color transition on display panels, this has the process of a time, namely the response time.Because the transfer process between the different GTGs of each pixel, is different in size, complicated, be difficult to represent with an objective yardstick.Because liquid crystal molecule " by black to white " is not on all four with the slewing rate of " by vain to black ", for the significant reaction velocity that indicates liquid crystal display of can trying one's best, using the GTG of " Hei-Bai-Hei " response time as display panels.
Conventionally, GTG is divided into two parts: rise time Tr and fall time Tf, and GTG be rise time Tr and fall time Tf and.Rise time Tr refers to executing in alive situation, when liquid crystal layer brightness changes to 10% from 90%, and the torsion time that liquid crystal layer is required; Fall time, Tf referred to executing in alive situation, when liquid crystal layer brightness changes to 90% from 10%, and the turnaround time that liquid crystal layer is required.
The coefficient of viscosity of liquid crystal material in GTG and liquid crystal layer, the driving voltage of liquid crystal layer, the thickness of liquid crystal layer is relevant with the specific inductive capacity of liquid crystal material.For specific liquid crystal layer, the coefficient of viscosity, the thickness of liquid crystal layer, specific inductive capacity is all determined, and driving voltage becomes the major parameter that affects the response time.Therefore, response speed be improved, driving voltage will be increased.Driving voltage is determined by the liquid crystal anglec of rotation: if the GTG changing is little, at this time driving voltage is lower, and the response time will extend greatly.
For instance, suppose that liquid crystal layer is by the phase place of polarized light rotation 1 degree, if only have one deck liquid crystal, now driving voltage will be very low, and the response time will be very long.If adopt two-layer liquid crystal layer, can be by controlling driving voltage, make the first liquid crystal layer 90-degree rotation, the second liquid crystal layer reverse rotation 89 degree, so greatly increased the driving voltage of liquid crystal layer, therefore, when adopting the first liquid crystal layer and at least during one deck the second liquid crystal layer, can reduce GTG, improve gray scale response speed.
Concrete, display panels as shown in Figure 1, described the second liquid crystal layer 14 described the first liquid crystal layer 13 and described between polaroid 12.
Certainly, concrete display panels as shown in Figure 2, described the second liquid crystal layer 14 can also be between described lower polaroid 11 and described the first liquid crystal layer 13.Suspension points in Fig. 2 represents multilayer the second liquid crystal layer.
The first liquid crystal layer and at least one deck the second liquid crystal layer are modulated the polarized light seeing through after lower polaroid, the first liquid crystal layer is modulated the phase place of polarized light by the rotation of liquid crystal molecule, making the angle of described polarized light rotation is α 1, n layer the second liquid crystal layer modulated this polarized light, rotate successively the second angle beta 1, the 3rd angle beta 2 ..., n+1 angle beta n.Described the first liquid crystal layer and n layer the second liquid crystal layer are modulated described polarized light, and the angle of rotation is α 1+ β 1+ β 2+...+ β n.
If described the first liquid crystal layer is under the effect of the driving signal of different brackets, by liquid crystal modulation, making the grey exponent number that pixel can show is N, described each second liquid crystal layer is driving under the effect of signal, and by liquid crystal modulation, making the grey exponent number that pixel can show is M.When the first liquid crystal layer makes the first angle sequence that light can rotate with the second angle sequence that makes after the first liquid crystal layer, the second liquid crystal layer modulation of n layer that light can rotate when identical, the angle sequence that described display panels can rotate light is minimum.The GTG that this display panels can show is the grey exponent number M that the first liquid crystal layer can show.The common modulation of all liquid crystal layers before each second liquid crystal layer and this second liquid crystal layer, make the second angle sequence of light rotation, all with all liquid crystal layers through before this second liquid crystal layer, light modulate while making the first angle sequence that light can rotate there is no the angle of repetition, the angle sequence that this display panels can rotate light is maximum.The grey exponent number that this display panels can show is maximum, to the grey exponent number that should be able to show, is N+M*n.
Concrete, as shown in Figure 3, described display panels comprises: backlight module 10, lower polaroid 11, upper polaroid 12, at the first liquid crystal layer 13 between lower polaroid and upper polaroid, the second liquid crystal layer 14 between described lower polaroid and upper polaroid.
Described the first liquid crystal layer and described the second liquid crystal layer have respectively corresponding driving circuit.For the first liquid crystal layer, under the effect of the driving signal of the different brackets producing at driving circuit, described the first liquid crystal layer is modulated seeing through the polarized light of lower polaroid, and described polarized light is rotated a certain angle.Described the second liquid crystal layer, under the effect of the driving signal of the different brackets producing at driving circuit, modulates again to the described polarized light by the first liquid crystal layer, and described polarized light is rotated a certain angle.
If described the first liquid crystal layer is driving under the effect of signal, rotation by liquid crystal molecule is modulated polarized light, the grey exponent number that can show is N, described the second liquid crystal layer is driving under the effect of signal, rotation by liquid crystal molecule is modulated polarized light, and the grey exponent number that can show is M.While making the second angle that polarized light can rotate repeat completely after the first liquid crystal layer makes the first angle sequence that polarized light can rotate and double-deck liquid crystal modulation, the grey exponent number that described display panels can show is minimum, is the grey exponent number N that the first liquid crystal layer can show.While making angle that the second angle sequence neither one that polarized light can rotate repeats after the first liquid crystal layer makes the first angle sequence that polarized light can rotate and double-deck liquid crystal modulation, the angle sequence that described display panels can rotate polarized light is maximum, now, the grey exponent number that described display panels can show is maximum, is N+M.
For instance, suppose by driving the control of signal to liquid crystal molecule, make the light that sees through liquid crystal layer can rotate 5.5 degree, 10 degree, 16.5 degree etc., but light can not rotate to 15.5 degree.For display panels as shown in Figure 3, can be by the control to driving signal, make to see through light rotation 10 degree of the first liquid crystal layer, see through light rotation 5.5 degree of the second liquid crystal layer, thereby, make phase rotating 15.5 degree of display panels to the light that will see through, increased GTG corresponding to 15.5 degree.
Optionally, described display panels can also comprise middle polaroid and one deck the second liquid crystal layer at least.
The described display panels of take comprises that one deck the second liquid crystal layer and a middle polaroid are example.As shown in Figure 4, described display panels comprises: backlight module 10, lower polaroid 11, upper polaroid 12, at the first liquid crystal layer 13 between lower polaroid and upper polaroid, the second liquid crystal layer 14 and middle polaroid 15 between described lower polaroid and upper polaroid.
In Fig. 4, take described the second liquid crystal layer 14 described the first liquid crystal layer 13 and described on be example between polaroid 12.Certainly, described the second liquid crystal layer 14 also can be between described lower polaroid 11 and described the first liquid crystal layer 13.
Described the first liquid crystal layer and described the second liquid crystal layer have respectively corresponding driving circuit.For the first liquid crystal layer, under the effect of the driving signal of the different brackets producing at driving circuit, described the first liquid crystal layer is modulated seeing through the polarized light of lower polaroid, and described polarized light is rotated a certain angle.Described polarized light further sees through middle polaroid.Described the second liquid crystal layer, under the effect of the driving signal of the different brackets producing at driving circuit, modulates again to the described polarized light that sees through middle polaroid, and this polarized light is rotated a certain angle.
If described the first liquid crystal layer is driving under the effect of signal, rotation by liquid crystal molecule is modulated polarized light, the grey exponent number that can show is N, described the second liquid crystal layer is driving under the effect of signal, rotation by liquid crystal molecule is modulated polarized light, and the grey exponent number that can show is M.While making the second angle sequence that polarized light can rotate repeat completely after the first liquid crystal layer makes the first angle sequence that polarized light can rotate and double-deck liquid crystal modulation, the grey exponent number that described display panels can show is minimum, is the grey exponent number N that the first liquid crystal layer can show.While making angle that the second angle sequence neither one that polarized light can rotate repeats after the first liquid crystal layer makes the first angle sequence that polarized light can rotate and double-deck liquid crystal modulation, the angle sequence that described display panels can rotate polarized light is maximum, now, the grey exponent number that described display panels can show is maximum.The grey exponent number that this display panels shows is N*M.
Gamma value (gamma) is the electro-optic response parameter of display panels.Different GTGs represents different brightness, and the brightness of different GTGs is decided by the gamma exponential function of GTG.When GTG figure place is 8, GTG is the arbitrary positive integer in 0-255.
For instance, if polarized light is by after the first liquid crystal layer, the GTG showing is A, the brightness that this GTG is corresponding is B, and described polarized light I1 is by after the second liquid crystal layer, and the brightness that display panels can show is B* (x/255) ^gamma, wherein, x is GTG, can get the arbitrary positive integer in 0-255, has increased the grey exponent number that display panels can show.
For instance, GTG is 1 o'clock, and the brightness that display panels shows is 0.5nit, and GTG is 2 o'clock, and the brightness that display panels shows is 2nit.When display panels is when to need display brightness be 0.5nit to the image of 2nit, traditional individual layer liquid crystal layer cannot make display panels show that 0.5nit is to the image of 2nit.For the structure that comprises the first liquid crystal layer, middle polaroid and the second liquid crystal layer described in the embodiment of the present invention, can be so that display panels display brightness be that 0.5nit is to the image of 2nit.Suppose that the GTG figure place that the second liquid crystal layer produces is 8, this second liquid crystal layer can show 256 grey exponent numbers.First, regulate to drive signal, making the GTG of the polarized light by the first liquid crystal layer is 2, i.e. brightness is 2nit; Then, can regulate the driving signal of the second liquid crystal layer, the brightness that the display panels that makes to modulate by bilayer can show is 2* (x/255) ^gamma, and x is the arbitrary positive integer in 0-255.Increased the GTG that display panels can show.
It is more than the situation that described display panels comprises one deck the second liquid crystal layer, for described display panels, comprise at least situation of one deck the second liquid crystal layer, as shown in Figure 5, described display panels comprises: backlight module 10, lower polaroid 11, upper polaroid 12, polaroid 15 in the first liquid crystal layer 13 between lower polaroid and upper polaroid, at least one deck the second liquid crystal layer 14 between described lower polaroid and upper polaroid and at least one corresponding with the described second liquid crystal layer number of plies.Described display panels also comprises for driving at least at least one driving circuit of one deck the second liquid crystal layer.Described polaroid 15 and described upper polaroid 12 in each, lower polaroid 11 and at least one the close polaroid between two in polaroid 15 form the polarizer and analyzer.Suspension points in Fig. 5 represents multilayer the second liquid crystal layer.Display panels as shown in Figure 5, described at least one deck the second liquid crystal layer is between described lower polaroid 11 and the first liquid crystal layer 13.Certainly, 14 layers, described at least one deck the second liquid crystal also can described the first liquid crystal layer 13 and described between polaroid 12.
When described display panels has n layer the second liquid crystal layer, and while having in L polaroid, establishing the grey exponent number that described the first liquid crystal layer can show is N, and the grey exponent number that described each second liquid crystal layer can show is M.When the first liquid crystal layer makes the first angle sequence that light can rotate with the second angle sequence that makes after the first liquid crystal layer, a L polaroid, the second liquid crystal layer modulation of n layer that light can rotate when identical, the angle sequence that described display panels can rotate light is minimum, is the grey exponent number N that the first liquid crystal layer can show display panels.All liquid crystal layers and middle polaroid before each second liquid crystal layer and this second liquid crystal layer are modulated jointly, the second angle sequence that light can be rotated, all with this second liquid crystal layer before all liquid crystal layers and the common modulation of middle polaroid while making the first angle that light can rotate there is no the angle of repetition, the angle sequence that this display panels can rotate light is maximum, the grey exponent number that this display panels can show is maximum, to the grey exponent number that should be able to show, is N*M*n.
The embodiment of the present invention provides a kind of display panels, described display panels comprises: backlight module, lower polaroid, upper polaroid, at the first liquid crystal layer between lower polaroid and upper polaroid and at least one deck the second liquid crystal layer between described lower polaroid and upper polaroid, and for driving at least at least one driving circuit of one deck the second liquid crystal layer.By described the second liquid crystal layer, increased grey exponent number, improved the display quality of display panels.
The embodiment of the present invention provides a kind of liquid crystal indicator, has the display panels of the described arbitrary characteristics of above-described embodiment.
The liquid crystal indicator that the embodiment of the present invention provides, described liquid crystal indicator can have product or the parts of Presentation Function for liquid crystal display, LCD TV, digital album (digital photo frame), mobile phone, panel computer etc., and the present invention does not do concrete restriction.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of programmed instruction, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (4)
1. a display panels, described display panels comprises: backlight module, lower polaroid, upper polaroid and the first liquid crystal layer between lower polaroid and upper polaroid, it is characterized in that, described display panels also comprises:
At least one deck the second liquid crystal layer between described lower polaroid and upper polaroid;
And for driving at least at least one driving circuit of one deck the second liquid crystal layer.
2. display panels according to claim 1, is characterized in that, described the second liquid crystal layer is between described lower polaroid and the first liquid crystal layer, or between described the first liquid crystal layer and upper polaroid.
3. display panels according to claim 1, it is characterized in that, described display panels, also comprises: polaroid at least one deck the second liquid crystal layer between described lower polaroid and upper polaroid and at least one corresponding with the described second liquid crystal layer number of plies;
Described at least one deck the second liquid crystal layer is between described lower polaroid and the first liquid crystal layer, or between described the first liquid crystal layer and upper polaroid;
Described in each polaroid between any two-layer liquid crystal layer, and described upper polaroid, lower polaroid and at least one the close polaroid between two in polaroid form the polarizer and analyzer.
4. a liquid crystal indicator, is characterized in that, comprises the display panels described in claims 1 to 3 any one.
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| CN201310012645.2A CN103926720A (en) | 2013-01-14 | 2013-01-14 | Liquid crystal display panel |
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| CN201310012645.2A CN103926720A (en) | 2013-01-14 | 2013-01-14 | Liquid crystal display panel |
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Cited By (7)
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| CN108227286A (en) * | 2018-01-25 | 2018-06-29 | 惠州市华星光电技术有限公司 | A kind of display panel and display device |
| CN112687244A (en) * | 2021-01-20 | 2021-04-20 | 惠科股份有限公司 | Display device, display panel and display method of display panel |
| WO2021109285A1 (en) * | 2019-12-06 | 2021-06-10 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display device and control method therefor |
| CN113243030A (en) * | 2019-09-26 | 2021-08-10 | 京东方科技集团股份有限公司 | Image processing method and device |
| CN113534539A (en) * | 2021-07-27 | 2021-10-22 | 武汉华星光电技术有限公司 | Display module and display device |
| CN114236920A (en) * | 2022-01-26 | 2022-03-25 | 重庆惠科金渝光电科技有限公司 | Display assembly, display panel and driving method |
| CN116125710A (en) * | 2022-12-27 | 2023-05-16 | 厦门天马微电子有限公司 | Display panel and display device |
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| CN108227286A (en) * | 2018-01-25 | 2018-06-29 | 惠州市华星光电技术有限公司 | A kind of display panel and display device |
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| CN114236920A (en) * | 2022-01-26 | 2022-03-25 | 重庆惠科金渝光电科技有限公司 | Display assembly, display panel and driving method |
| CN114236920B (en) * | 2022-01-26 | 2024-10-18 | 重庆惠科金渝光电科技有限公司 | Display assembly, display panel and driving method |
| CN116125710A (en) * | 2022-12-27 | 2023-05-16 | 厦门天马微电子有限公司 | Display panel and display device |
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