CN104134431B - Field sequential display device and driving method thereof - Google Patents
Field sequential display device and driving method thereof Download PDFInfo
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- CN104134431B CN104134431B CN201410334529.7A CN201410334529A CN104134431B CN 104134431 B CN104134431 B CN 104134431B CN 201410334529 A CN201410334529 A CN 201410334529A CN 104134431 B CN104134431 B CN 104134431B
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Abstract
The present invention relates to Display Technique field, disclose a kind of field sequential display device and driving method thereof.Each pixel cell of described field sequential display device includes at least two sub-pixel unit, by arranging light-shielding structure, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, simultaneously, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, such that it is able to reduce the deflection number of times of liquid crystal molecule corresponding to sub-pixel unit, the response time of liquid crystal can be extended, overcome the bottleneck of liquid crystal response time during a sequence shows.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of field sequential display device and driving method thereof.
Background technology
The agent structure of liquid crystal indicator is liquid crystal panel, and liquid crystal panel includes the upper substrate to box and infrabasal plate, and is filled in the liquid crystal between upper substrate and infrabasal plate.Liquid crystal indicator also includes driving the drive circuit of liquid crystal panel and providing the backlight of area source for liquid crystal panel.Wherein, the method for liquid crystal indicator realization colour display is divided into RGB (red, green, blue) color filter method and colored field sequential method.
In the liquid crystal indicator using RGB color filter method, each pixel cell is divided into three RGB sub-pixel unit, and for each sub-pixel unit provide corresponding color color filter, the light that backlight sends is sent to RGB color filter by liquid crystal, is consequently formed coloured image.
In the liquid crystal indicator using colored field sequential method, each pixel cell arranges rgb light source, rather than pixel cell is decomposed into three RGB sub-pixel unit.And in the way of timesharing, R, G and the B primaries that rgb light source sends is made to pass sequentially through liquid crystal injection, correspondingly control the angle that liquid crystal molecule timesharing deflection corresponding to pixel cell is preset, the GTG of corresponding R, G and B primaries, thus use afterimage effect to show coloured image.Concrete, as shown in Figure 1, first data R is shown on liquid crystal panel, control the first angle that liquid crystal molecule deflection corresponding for pixel cell 10 ＇ is preset, fully after response, connect the R light source 1 of backlight, it is then turned off R light source 1, with video data G on liquid crystal panel, control the second angle that liquid crystal molecule deflection corresponding for pixel cell 10 ＇ is preset, fully after response, connect the G light source 2 of backlight, it is then turned off G light source 2, with video data B on liquid crystal panel, control the third angle that liquid crystal molecule deflection corresponding for pixel cell 10 ＇ is preset, fully after response, connect the B light source 3 of backlight, form a coloured image.
Colored field sequential method make use of the principle of time mixing color, and RGB color filter method have employed spacing color mixed principle.Owing to colored field sequential method does not need sub-pix, resolution can realize three times of raisings, nor needs color film, does not have the loss that color blocking passes through, and transmitance is high, and color saturation is good.It addition, colored field sequential method is provided source by backlight as color, therefore can be easy to show at colour, change between monochromatic display and white and black displays.Under same resolution, the pixel driver of colored field sequential method reduces 2/3, reduces energy consumption.
But, colored field sequential method needs liquid crystal to have higher response speed, needing be down to RGB color filter method 1/3 just can meet requirement on response time, for existing technical merit, response time problem has become as the main technical bottleneck of colored field sequential method.
Summary of the invention
The present invention provides a kind of field sequential display device and driving method thereof, in order to solve the liquid crystal response matter of time during a sequence shows.
For solving above-mentioned technical problem, the present invention provides a kind of field sequential display device, including:
Liquid crystal panel, including multiple sub-pixel unit；
Backlight, in order to produce the light of different colours, and is supplied to described liquid crystal panel, and wherein, described field sequential display device also includes:
Controller, for, in the display process of each frame, carrying out GTG control to the N number of sub-pixel unit forming a pixel cell so that pixel cell shows the pixel data of correspondence by the mode that field sequence shows, wherein, N is positive integer, and N >=2；
At least one light-shielding structure, in the display process of each frame, it is light transmission state that described controller controls certain sub-pixel unit of pixel cell, carry out the display of corresponding GTG, simultaneously, also control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell so that the sub-pixel unit corresponding with described light-shielding structure position is light tight state..
Field as above sequential display device, preferably, in the display process of each frame, it is light transmission state that described controller controls certain sub-pixel unit of pixel cell, carry out the display of corresponding GTG, simultaneously, it is corresponding with at least one position in other sub-pixel unit of pixel cell that described controller also controls light-shielding structure, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, and the control sub-pixel unit corresponding with light-shielding structure position carries out the display of other GTGs.
Field as above sequential display device, it is preferred that described pixel cell includes two the first adjacent sub-pixel unit and the second sub-pixel unit；Described field sequential display device includes a light-shielding structure；
In the display process of each frame, for the first adjacent GTG and the second GTG, it is corresponding with the position of described second sub-pixel unit that described controller controls light-shielding structure, and control the first sub-pixel unit and carry out the display of the first GTG；In the display of the second GTG, it is corresponding with the position of the first sub-pixel unit that described controller controls described light-shielding structure, and control the second sub-pixel unit and carry out the display of the second GTG, control the first sub-pixel unit simultaneously and carry out the display of threeth GTG adjacent with the second GTG.
Field as above sequential display device, it is preferred that described backlight includes the light source of M kind different colours, wherein, M is positive integer, and N≤M < 3N.
Field as above sequential display device, it is preferred that described backlight includes red light source, green light source and blue-light source.
Field as above sequential display device, it is preferred that described light-shielding structure is between described liquid crystal panel and backlight.
Field as above sequential display device, it is preferred that described liquid crystal panel includes first substrate and second substrate that box is arranged, and is filled in the liquid crystal between described first substrate and second substrate；
Described controller includes:
Pixel driver, in order to control the angle that liquid crystal molecule deflection corresponding to each sub-pixel unit is preset, it is achieved the display of specific grey-scale；
Backlight controller, the light producing required color in order to control described backlight is incident in pixel cell, and coordinates with described pixel driver, controls each sub-pixel unit and realizes the display of particular color and GTG；
Switching device, coordinates with described pixel driver, in order to switch the position of light-shielding structure in the display process of each frame.
The present invention also provides for the driving method of a kind of sequential display device, and described field sequential display device includes:
Liquid crystal panel, including multiple sub-pixel unit；
Backlight, in order to produce the light of different colours, and is supplied to described liquid crystal panel, and wherein, described field sequential display device also includes at least one light-shielding structure；
Described driving method includes:
In the display process of each frame, the N number of sub-pixel unit forming a pixel cell is carried out GTG control so that pixel cell shows the pixel data of correspondence by the mode that field sequence shows, wherein, N is positive integer, and N >=2；
Wherein, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, simultaneously, also control described light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell so that the sub-pixel unit corresponding with described light-shielding structure position is light tight state.
Driving method as above, preferably, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, meanwhile, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, and the control sub-pixel unit corresponding with described light-shielding structure position carries out the display of other GTGs.
Driving method as above, it is preferred that described pixel cell includes two the first adjacent sub-pixel unit and the second sub-pixel unit；Described field sequential display device includes a light-shielding structure；
In the display process of each frame, for the first adjacent GTG and the second GTG, control light-shielding structure corresponding with the position of described second sub-pixel unit, and control the first sub-pixel unit and carry out the display of the first GTG；In the display of the second GTG, control described light-shielding structure corresponding with the position of the first sub-pixel unit, and control the second sub-pixel unit and carry out the display of the second GTG, control the first sub-pixel unit simultaneously and carry out the display of threeth GTG adjacent with the second GTG.
Having the beneficial effect that of the technique scheme of the present invention:
In technique scheme, each pixel cell of field sequential display device includes at least two sub-pixel unit, by arranging light-shielding structure, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, simultaneously, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, such that it is able to reduce the deflection number of times of liquid crystal molecule corresponding to sub-pixel unit, the response time of liquid crystal can be extended, overcome the bottleneck of liquid crystal response time during a sequence shows.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 represents the displaying principle schematic diagram of prior art midfield sequential display device；
Fig. 2 represents the displaying principle schematic diagram of embodiment of the present invention midfield sequential display device.
Detailed description of the invention
Color field sequence shows that (showing hereinafter referred to as field sequence) is that liquid crystal indicator realizes one of colored method shown, it is in the display process of each frame, in the way of timesharing, make red (R) light that backlight sends, green (G) light, indigo plant (B) light primaries pass sequentially through liquid crystal panel injection to the side showing picture, thus use afterimage effect to show coloured image.It is utilize the principle of time mixing color to realize colored display owing to field sequence shows, do not need sub-pix, relative to utilizing the spacing color mixed RGB color filter method realizing colour display, the resolution that field sequence shows can realize three times of raisings, nor need color film, not havinging the loss that color blocking passes through, transmitance is high, and color saturation is good.It addition, field sequence shows is provided source by backlight as color, therefore can be easy to show at colour, change between monochromatic display and white and black displays.Under same resolution, relative to RGB color filter method, the pixel driver that field sequence shows reduces 2/3, reduces energy consumption.
But, field sequence is shown in the display process of each frame, and liquid crystal molecule is required for deflection three times, shows the GTG that R, G, B primaries is corresponding respectively, thus the color that display is required.Therefore, field sequence shows that the response time to liquid crystal has higher requirement so that the response time problem of liquid crystal becomes the main technical bottleneck that a sequence shows.
The bottleneck problem that the liquid crystal response time shown to solve a sequence exists, the present invention provides a kind of field sequential display device and driving method thereof, each pixel cell of described field sequential display device includes at least two sub-pixel unit, by arranging light-shielding structure, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, simultaneously, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, such that it is able to reduce the deflection number of times of liquid crystal molecule corresponding to sub-pixel unit, the response time of liquid crystal can be extended, overcome the bottleneck of liquid crystal response time during a sequence shows.
In the present invention, sub-pixel unit is light transmission state and light tight state refers to:
Light transmission state refers to: this sub-pixel unit is not corresponding with the position of light-shielding structure, because being subject to blocking of light-shielding structure, and the light that backlight sends will not be made can not to pass through sub-pixel unit injection and show the side of picture to liquid crystal panel.If the liquid crystal molecule now controlling sub-pixel unit corresponding deflects to the angle that 0 GTG is corresponding, represent 0 GTG that sub-pixel unit shows.
Light tight state refers to: this sub-pixel unit is corresponding with the position of light-shielding structure, because being subject to blocking of light-shielding structure, and makes the light that backlight sends cannot pass through sub-pixel unit injection and shows the side of picture to liquid crystal panel.If now the liquid crystal molecule by controlling sub-pixel unit corresponding deflects to the angle that 0 GTG is corresponding, also represent 0 GTG that sub-pixel unit shows.
GTG in the present invention shows and refers to:
Liquid crystal molecule corresponding to sub-pixel unit deflects to the predetermined angle corresponding with certain GTG, do not limit this sub-pixel unit and necessarily have light transmission, that is, sub-pixel unit is when carrying out GTG display, it is not necessary to has light to pass through the injection of this sub-pixel unit and shows the side of picture to liquid crystal panel.
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
Embodiment one
The present invention provides a kind of field sequential display device, and it includes liquid crystal panel, backlight and controller.Described liquid crystal panel includes multiple sub-pixel unit, the angle that described controller is different in order to control liquid crystal molecule deflection, thus realizing the GTG of sub-pixel unit is controlled.Described backlight is in order to produce the light of different colours, and is supplied to described liquid crystal panel.
Described liquid crystal panel specifically includes first substrate and second substrate that box is arranged, and is filled in the liquid crystal between described first substrate and second substrate.Each sub-pixel unit includes the pixel electrode and the public electrode that coordinate, and described controller is by applying certain voltage to pixel electrode, it is possible to control the angle that corresponding liquid crystal molecule deflection is preset, it is achieved the display of specific grey-scale.
Described backlight can send RGB primaries, it is also possible to sends the combination of RGB primaries, such as white light, dark red light and dark blue light.Certainly, backlight can be sent out the combination except RGB primaries or RGB primaries except light, such as gold-tinted, fuchsin light etc..
Concrete, backlight can pass through the light emitting diode (LED) of multiple shades of colour light and be formed, but is not limited thereto.
In the embodiment of the present invention, the controller of field sequential display device is specifically in the display process of each frame, the N number of sub-pixel unit forming a pixel cell is carried out GTG control, pixel cell is made to show the pixel data of correspondence (including color and the GTG of display) by the mode that a sequence shows, wherein, N is positive integer, and N >=2.Described field sequential display device also includes at least one light-shielding structure, in the display process of each frame, it is light transmission state (namely described light-shielding structure is not corresponding with the position of certain sub-pixel unit described) that described controller controls certain sub-pixel unit of pixel cell, carry out the display of corresponding GTG, simultaneously, also control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell so that the sub-pixel unit corresponding with described light-shielding structure position is light tight state.
In technique scheme, owing to the pixel cell of field sequential display device includes the sub-pixel unit of more than 2, and it is light transmission state in certain sub-pixel unit of pixel cell, carries out the display of corresponding GTG.Simultaneously, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure is light tight state, such that it is able to reduce the deflection number of times of liquid crystal molecule corresponding to sub-pixel unit, the response time of liquid crystal can be extended, overcome the bottleneck of liquid crystal response time during a sequence shows.
In order to realize the function of light-shielding structure, it is possible to be arranged on by light-shielding structure between described liquid crystal panel and backlight, the light that blocking-up backlight sends is supplied to liquid crystal panel, so that the sub-pixel unit corresponding with light-shielding structure position is light tight state.
Further, in the display process of each frame, it is light transmission state that described controller controls certain sub-pixel unit of pixel cell, carries out the display of corresponding GTG.Simultaneously, it is corresponding with at least one position in other sub-pixel unit of pixel cell that described controller also controls light-shielding structure, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, and the control sub-pixel unit corresponding with light-shielding structure position carries out the display of other GTGs.Owing to the sub-pixel unit corresponding with light-shielding structure position is light tight state, when controlling the angle that liquid crystal molecule deflection corresponding to this sub-pixel unit is certain, when carrying out the display of other GTGs, without influence on the display of current gray, and extend the response time of liquid crystal molecule.
In prior art, the backlight of liquid crystal indicator is generally three-color light source or four color light source.In the sequential display device of existing field, each pixel cell i.e. a corresponding sub-pixel unit, it is desirable to the response time of liquid crystal molecule is 1/3 (corresponding three-color light source) or 1/4 (corresponding four color light source) of a frame display time.
And in the embodiment of the present invention, when the pixel cell arranging a sequential display device includes two adjacent sub-pixel unit, said two sub-pixel unit shows in order to alternately to realize three coloured light or GTG corresponding to four coloured light.For three-color light source, can so that the response time of liquid crystal molecule extends to the 2/3 of a frame display time, so that the response time of liquid crystal molecule extends to the 2/4 of a frame display time, relative to existing field sequential display device, the response time of liquid crystal molecule can be all extended for four color light source.But, when backlight is five color light source, the response time of liquid crystal molecule is only the 2/5 of a frame display time, and the prolongation of liquid crystal molecule response time is limited.Therefore, in order to better improve the liquid crystal response time bottleneck problem of a sequential display device, when backlight includes the light source of M kind different colours, when pixel cell includes N number of sub-pixel unit, it is desirable to arrange N≤M < 3N, wherein, M is positive integer.
Concrete, when the pixel cell of sequential display device includes two the first adjacent sub-pixel unit and the second sub-pixel unit on the spot, the number of described light-shielding structure is one.In the display process of each frame, for the first adjacent GTG and the second GTG, it is corresponding with the position of described second sub-pixel unit that described controller controls light-shielding structure, and control the first sub-pixel unit and carry out the display of the first GTG；In the display of the second GTG, it is corresponding with the position of the first sub-pixel unit that described controller controls described light-shielding structure, and control the second sub-pixel unit and carry out the display of the second GTG, control the first sub-pixel unit simultaneously and carry out the display of threeth GTG adjacent with the second GTG.Owing to first sub-pixel unit corresponding with light-shielding structure position is light tight state, when controlling the angle that liquid crystal molecule deflection corresponding to the first sub-pixel unit is certain, when carrying out the display of the 3rd GTG, without influence on the display of the second GTG, and extend the response time of liquid crystal molecule.
As it is shown in figure 1, in the embodiment of the present invention, the principle that is particularly shown of field sequential display device is:
Wherein, the pixel cell of field sequential display device includes two the first adjacent sub-pixel unit 10 and the second sub-pixel unit 11, and backlight includes red light source 1, green light source 2 and blue-light source 3.Field sequential display device also includes a light-shielding structure 4.
At initial position, light-shielding structure 4 is corresponding with the position of the second sub-pixel unit 11, and the light of backlight is blocked structure 4 to be stopped, it is impossible to be supplied to the second sub-pixel unit 11 so that the second sub-pixel unit 11 is light tight state.And the first sub-pixel unit 10 is not corresponding with the position of light-shielding structure 4, for light transmission state.
The display of each frame comprises the following steps:
Step S1, first control the first sub-pixel unit 10 correspondence liquid crystal molecule deflection, it is achieved the GTG of HONGGUANG shows；Then open the red light source 1 of backlight, provide HONGGUANG for liquid crystal panel.Meanwhile, control the liquid crystal molecule deflection of the second sub-pixel unit 11 correspondence, it is achieved the GTG of green glow shows, owing to the second sub-pixel unit 11 is light tight state, HONGGUANG and the display of corresponding GTG thereof can't be affected.
Step S2, switching light-shielding structure 4 position so that it is corresponding with the position of the first sub-pixel unit 10, the light of backlight is blocked structure 4 to be stopped, it is impossible to be supplied to the first sub-pixel unit 10 so that the first sub-pixel unit 10 is light tight state.And the second sub-pixel unit 11 is not corresponding with the position of light-shielding structure 4, for light transmission state.
Step S3, opening the green light source 2 of backlight, provide green glow for liquid crystal panel, owing to the liquid crystal molecule of the second sub-pixel unit 11 correspondence begins to deflection from step S1, the GTG to realize green glow shows, thus extending the liquid crystal response time.Meanwhile, control the liquid crystal molecule deflection of the first sub-pixel unit 10 correspondence, it is achieved the GTG of blue light shows, owing to the first sub-pixel unit 10 is light tight state, green glow and the display of corresponding GTG thereof can't be affected.
Step S4, switching light-shielding structure 4 position so that it is corresponding with the position of the second sub-pixel unit 11, the light of backlight is blocked structure 4 to be stopped, it is impossible to be supplied to the second sub-pixel unit 11 so that the second sub-pixel unit 11 is light tight state.And the first sub-pixel unit 10 is not corresponding with the position of light-shielding structure 4, for light transmission state.
Step S5, opening the blue-light source 3 of backlight, provide blue light for liquid crystal panel, owing to the liquid crystal molecule of the first sub-pixel unit 10 correspondence begins to deflection from step S3, the GTG to realize blue light shows, thus extending the liquid crystal response time.Meanwhile, control the liquid crystal molecule deflection of the second sub-pixel unit 11 correspondence, it is achieved during next frame show, the GTG of HONGGUANG shows, owing to the second sub-pixel unit 11 is light tight state, the display of blue light and correspondence GTG thereof in this frame can't be affected.
In above-mentioned steps, red light source 1, green light source 2 and the opening sequence of blue-light source 3 and the GTG of correspondence thereof show and are not limited thereto.
In a specific embodiment, the controller of field sequential display device includes:
Pixel driver, in order to control the angle that liquid crystal molecule deflection corresponding to each sub-pixel unit is preset, it is achieved the display of specific grey-scale；
Backlight controller, the light producing required color in order to control described backlight is incident in sub-pixel unit, and coordinates with described pixel driver, controls each sub-pixel unit and realizes the display of particular color and GTG；
Switching device, coordinates with described pixel driver, in order to switch the position of light-shielding structure in the display process of each frame.
Wherein, described pixel driver, backlight controller and switching device can operate under control of the synchronization signal accordingly, making pixel cell show the pixel data of correspondence by the mode that a sequence shows, described pixel data includes color data and luma data.
Embodiment two
The present invention also provides for the driving method of a kind of sequential display device, and described field sequential display device includes liquid crystal panel and backlight, and described liquid crystal panel includes multiple sub-pixel unit, and described backlight is in order to produce the light of different colours, and is supplied to described liquid crystal panel.Described field sequential display device also includes at least one light-shielding structure, and the light in order to stop backlight is supplied to the sub-pixel unit of liquid crystal panel.
Described driving method includes:
In the display process of each frame, the N number of sub-pixel unit forming a pixel cell is carried out GTG control so that pixel cell shows the pixel data of correspondence by the mode that field sequence shows, wherein, N is positive integer, and N >=2.
Wherein, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, simultaneously, also control described light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell so that the sub-pixel unit corresponding with described light-shielding structure position is light tight state.
The deflection number of times of liquid crystal molecule corresponding to sub-pixel unit can be reduced, it is possible to extend the response time of liquid crystal, overcome the bottleneck of liquid crystal response time during a sequence shows by above-mentioned driving method.
Further, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carries out the display of corresponding GTG.Simultaneously, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, and the control sub-pixel unit corresponding with light-shielding structure position carries out the display of other GTGs.Owing to the sub-pixel unit corresponding with light-shielding structure position is light tight state, when controlling the angle that liquid crystal molecule deflection corresponding to this sub-pixel unit is certain, when carrying out the display of other GTGs, without influence on the display of current gray, and extend the response time of liquid crystal molecule.
When including two adjacent first sub-pixel unit and the second sub-pixel unit when described pixel cell, described field sequential display device includes a light-shielding structure, then:
In the display process of each frame, for the first adjacent GTG and the second GTG, control light-shielding structure corresponding with the position of described second sub-pixel unit, and control the first sub-pixel unit and carry out the display of the first GTG；In the display of the second GTG, control described light-shielding structure corresponding with the position of the first sub-pixel unit, and control the second sub-pixel unit and carry out the display of the second GTG, control the first sub-pixel unit simultaneously and carry out the display of threeth GTG adjacent with the second GTG.
As it is shown in figure 1, in the embodiment of the present invention, the concrete driving method of field sequential display device is:
Wherein, the pixel cell of field sequential display device includes two the first adjacent sub-pixel unit 10 and the second sub-pixel unit 11, and backlight includes red light source 1, green light source 2 and blue-light source 3.Field sequential display device also includes a light-shielding structure 4.
At initial position, light-shielding structure 4 is corresponding with the position of the second sub-pixel unit 11, and the light of backlight is blocked structure 4 to be stopped, it is impossible to be supplied to the second sub-pixel unit 11 so that the second sub-pixel unit 11 is light tight state.And the first sub-pixel unit 10 is light transmission state.
The display of each frame comprises the following steps:
Step S1, first control the first sub-pixel unit 10 correspondence liquid crystal molecule deflection, it is achieved the GTG of HONGGUANG shows；Then open the red light source 1 of backlight, provide HONGGUANG for liquid crystal panel.Meanwhile, control the liquid crystal molecule deflection of the second sub-pixel unit 11 correspondence, it is achieved the GTG of green glow shows, owing to the second sub-pixel unit 11 is light tight state, HONGGUANG and the display of corresponding GTG thereof can't be affected.
Step S2, switching light-shielding structure 4 position so that it is corresponding with the position of the first sub-pixel unit 10, the light of backlight is blocked structure 4 to be stopped, it is impossible to be supplied to the first sub-pixel unit 10 so that the first sub-pixel unit 10 is light tight state.And the second sub-pixel unit 11 is not corresponding with the position of light-shielding structure 4, for light transmission state.
Step S3, opening the green light source 2 of backlight, provide green glow for liquid crystal panel, owing to the liquid crystal molecule of the second sub-pixel unit 11 correspondence begins to deflection from step S1, the GTG to realize green glow shows, thus extending the liquid crystal response time.Meanwhile, control the liquid crystal molecule deflection of the first sub-pixel unit 10 correspondence, it is achieved the GTG of blue light shows, owing to the first sub-pixel unit 10 is light tight state, green glow and the display of corresponding GTG thereof can't be affected.
Step S4, switching light-shielding structure 4 position so that it is corresponding with the position of the second sub-pixel unit 11, the light of backlight is blocked structure 4 to be stopped, it is impossible to be supplied to the second sub-pixel unit 11 so that the second sub-pixel unit 11 is light tight state.And the first sub-pixel unit 10 is not corresponding with the position of light-shielding structure 4, for light transmission state.
Step S5, opening the blue-light source 3 of backlight, provide blue light for liquid crystal panel, owing to the liquid crystal molecule of the first sub-pixel unit 10 correspondence begins to deflection from step S3, the GTG to realize blue light shows, thus extending the liquid crystal response time.Meanwhile, control the liquid crystal molecule deflection of the second sub-pixel unit 11 correspondence, it is achieved during next frame show, the GTG of HONGGUANG shows, owing to the second sub-pixel unit 11 is light tight state, the display of blue light and correspondence GTG thereof in this frame can't be affected.
In above-mentioned steps, red light source 1, green light source 2 and the opening sequence of blue-light source 3 and the GTG of correspondence thereof show and are not limited thereto.
In technical scheme, each pixel cell of field sequential display device includes at least two sub-pixel unit, by arranging light-shielding structure, in the display process of each frame, certain sub-pixel unit controlling pixel cell carries out the display of corresponding GTG, simultaneously, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, such that it is able to reduce the deflection number of times of liquid crystal molecule corresponding to sub-pixel unit, the response time of liquid crystal can be extended, overcome the bottleneck of liquid crystal response time during a sequence shows.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and replacement, these improve and replace and also should be regarded as protection scope of the present invention.
Claims (10)
1. a field sequential display device, including:
Liquid crystal panel, including multiple sub-pixel unit；
Backlight, in order to produce the light of different colours, and is supplied to described liquid crystal panel, it is characterised in that described field sequential display device also includes:
Controller, for, in the display process of each frame, carrying out GTG control to the N number of sub-pixel unit forming a pixel cell so that pixel cell shows the pixel data of correspondence by the mode that field sequence shows, wherein, N is positive integer, and N >=2；
At least one light-shielding structure, in the display process of each frame, it is light transmission state that described controller controls certain sub-pixel unit of pixel cell, carry out the display of corresponding GTG, simultaneously, also control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell so that the sub-pixel unit corresponding with described light-shielding structure position is light tight state.
2. according to claim 1 sequential display device, it is characterized in that, in the display process of each frame, it is light transmission state that described controller controls certain sub-pixel unit of pixel cell, carry out the display of corresponding GTG, simultaneously, it is corresponding with at least one position in other sub-pixel unit of pixel cell that described controller also controls light-shielding structure, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, and the control sub-pixel unit corresponding with light-shielding structure position carries out the display of other GTGs.
3. according to claim 2 sequential display device, it is characterised in that described pixel cell includes two the first adjacent sub-pixel unit and the second sub-pixel unit；Described field sequential display device includes a light-shielding structure；
In the display process of each frame, for the first adjacent GTG and the second GTG, it is corresponding with the position of described second sub-pixel unit that described controller controls light-shielding structure, and control the first sub-pixel unit and carry out the display of the first GTG；In the display of the second GTG, it is corresponding with the position of the first sub-pixel unit that described controller controls described light-shielding structure, and control the second sub-pixel unit and carry out the display of the second GTG, control the first sub-pixel unit simultaneously and carry out the display of threeth GTG adjacent with the second GTG.
4. according to claim 3 sequential display device, it is characterised in that described backlight includes the light source of M kind different colours, wherein, M is positive integer, and N≤M < 3N.
5. according to claim 4 sequential display device, it is characterised in that described backlight includes red light source, green light source and blue-light source.
6. the field sequential display device according to any one of claim 1-5, it is characterised in that described light-shielding structure is between described liquid crystal panel and backlight.
7. the field sequential display device according to any one of claim 1-5, it is characterised in that described liquid crystal panel includes first substrate and second substrate that box is arranged, and is filled in the liquid crystal between described first substrate and second substrate；
Described controller includes:
Pixel driver, in order to control the angle that liquid crystal molecule deflection corresponding to each sub-pixel unit is preset, it is achieved the display of specific grey-scale；
Backlight controller, the light producing required color in order to control described backlight is incident in pixel cell, and coordinates with described pixel driver, controls each sub-pixel unit and realizes the display of particular color and GTG；
Switching device, coordinates with described pixel driver, in order to switch the position of light-shielding structure in the display process of each frame.
8. a driving method for field sequential display device, described field sequential display device includes:
Liquid crystal panel, including multiple sub-pixel unit；
Backlight, in order to produce the light of different colours, and is supplied to described liquid crystal panel, it is characterised in that described field sequential display device also includes at least one light-shielding structure；
Described driving method includes:
In the display process of each frame, the N number of sub-pixel unit forming a pixel cell is carried out GTG control so that pixel cell shows the pixel data of correspondence by the mode that field sequence shows, wherein, N is positive integer, and N >=2；
Wherein, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, simultaneously, also control described light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell so that the sub-pixel unit corresponding with described light-shielding structure position is light tight state.
9. driving method according to claim 8, it is characterized in that, in the display process of each frame, certain sub-pixel unit controlling pixel cell is light transmission state, carry out the display of corresponding GTG, meanwhile, control light-shielding structure corresponding with at least one position in other sub-pixel unit of pixel cell, making the sub-pixel unit corresponding with described light-shielding structure position is light tight state, and the control sub-pixel unit corresponding with described light-shielding structure position carries out the display of other GTGs.
10. driving method according to claim 9, it is characterised in that described pixel cell includes two the first adjacent sub-pixel unit and the second sub-pixel unit；Described field sequential display device includes a light-shielding structure；
In the display process of each frame, for the first adjacent GTG and the second GTG, control light-shielding structure corresponding with the position of described second sub-pixel unit, and control the first sub-pixel unit and carry out the display of the first GTG；In the display of the second GTG, control described light-shielding structure corresponding with the position of the first sub-pixel unit, and control the second sub-pixel unit and carry out the display of the second GTG, control the first sub-pixel unit simultaneously and carry out the display of threeth GTG adjacent with the second GTG.
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| CN108206016B (en) * | 2018-01-02 | 2020-02-07 | 京东方科技集团股份有限公司 | Pixel unit, driving method thereof and display device |
| CN115083360B (en) * | 2021-03-10 | 2023-04-07 | 成都九天画芯科技有限公司 | Field sequence time color mixing algorithm |
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