CN202256951U

CN202256951U - Liquid crystal display

Info

Publication number: CN202256951U
Application number: CN2011203234243U
Authority: CN
Inventors: 侯鸿龙; 賀成明
Original assignee: Shenzhen China Star Optoelectronics Technology Co Ltd
Current assignee: TCL China Star Optoelectronics Technology Co Ltd
Priority date: 2011-08-31
Filing date: 2011-08-31
Publication date: 2012-05-30
Anticipated expiration: 2021-08-31

Abstract

The utility model provides a liquid crystal display, which comprises a TFT-LCD (Thin Film Transistor-Liquid Crystal Display) module, wherein the TFT-LCD module comprises a pixel, a data line and a first switch tube for controlling the switch-on of the pixel, wherein the pixel comprises a primary pixel and a secondary pixel; the TFT-LCD module further comprises a pair of pixel capacitors and a second switch tube; and the TFT-LCD module further comprises a third switch tube for controlling the switch-on of the primary pixel or the secondary pixel. By controlling the switch-on of the primary pixel or the secondary pixel, the effects of reducing crosstalk phenomena during watching of 3D (three-dimensional) images and the absence of brightness decay during watching of three-dimensional images are achieved.

Description

LCD

Technical field

The utility model relates to field of liquid crystal display, particularly relates to a kind of 2D (two dimension) of crosstalking simultaneously to display that reduces between the pixel and shows that image quality not have the LCD that influences.

Background technology

Development along with 3D (three-dimensional) technology; People are for watching the demand of 3D film increasingly high through the 3D display; A kind of common spectacle 3D LCD cross section is as shown in Figure 1, and it comprises TFT-LCD (Thin Film Transistor-Liquid Crystal Display: thin film field-effect pipe LCD) module 110 and phase delay chip 120 (Retarder).TFT-LCD module 110 comprises TFT substrate 111; Between TFT-LCD module 110 and phase delay chip 120, also be provided with CF substrate 130 (Color Filter: colored filter); Have transparent TFT circuit on the TFT substrate 111, CF substrate 130 then has the trichromatic colored light-filtering units of many RGB (RGB).The picture element signal of this type of 3D panel of LCD from top to bottom is respectively the circulation of left eye signal and right eye signal, makes light signal that display shows received by right and left eyes by the staggered up and down mode of horizontal stripe formula, as shown in Figure 2.

Before TFT-LCD module 110, post phase delay chip 120; Circulation according to the right and left eyes signal from top to bottom of the picture element signal on the display; Phase arrangement through phase delay chip 120 gives right and left eyes different phase offset respectively, makes that the right and left eyes conversion of signals of the same vertical polarization state that TFT-LCD module 110 is sent is the different polarization light of right and left eyes.As shown in Figure 1; Suppose that it is the vertical polarization attitude that TFT-LCD module 110 goes out polarization state of light, the picture element signal of right eye becomes horizontal polarization through λ/2 wave plates, and the picture element signal of left eye is kept the vertical polarization attitude through 0 phase place wave plate; See through polarising glass again, be able to distinguish the right and left eyes signal.

But in the design of Fig. 1, there is a shortcoming; Promptly vertically observe limited with great visual angle; The visual angle can not surpass ± θ 1, surpasses ± θ 1 like observation visual angle, and the picture element signal that then can observe left eye sees through λ/2 wave plates; The picture element signal of right eye sees through 0 phase place wave plate, makes the observed left eye signal of vertical polariscope that sees through left eye originally also observe the right eye picture element signal simultaneously because the vertical right eye signal that produces through 0 phase place wave plate with great visual angle; And the observed right eye signal of horizontal polariscope that sees through right eye originally also observes the left eye picture element signal simultaneously because the horizontal left eye signal that produces through λ/2 wave plates with great visual angle; Produce so-called crosstalk phenomenon (crosstalk), promptly the picture profile of high-contrast is in the traction phenomena of background portion generation.

Fig. 3 is a kind of mode of improving the crosstalk phenomenon of LCD; Promptly on former CF substrate 130, design black matrix (black matrix); Make that original diameter is that λ/2 wave plates of a and the available reduced of 0 phase place wave plate are b; Angle through corresponding phase delay chip 120 when making the right and left eyes signal with great visual angle becomes big, thereby has increased the viewing angle that does not produce crosstalk phenomenon.But when being to use this LCD to watch two dimensional image, because the existence of black matrix on the CF substrate 130, brightness descends when making this liquid crystal display displays two dimensional image.

Fig. 4 and Fig. 5 are the another kind of mode of improving the crosstalk phenomenon of LCD; Promptly change the light-emitting zone scope of pixel; At this moment need use 2 data lines or 2 sweep traces to come the grey scale signal and the black matrix signal of control pixel separately; Make grey scale signal and black matrix signal space; Because the existence of black matrix signal is arranged, can reach the effect that increase can be watched the time of left eye signal or right eye signal with great visual angle equally, thereby reduce the crosstalk phenomenon between the pixel in the picture element signal that sends through TFT-LCD module 110 like this.

But when being to use this method; Owing to used double data line or sweep trace to make the expense of chip for driving increase, and be not suitable for through capacitor charge and discharge realize main pixel region and time pixel region the CS display mode (Charging sharing: the charging and discharging display mode) because in the CS display mode; In the LCD 600 as shown in Figure 6; The voltage of the voltage of main pixel 620 and time pixel 630 is by the pixel capacitance (not shown) decision that is connected separately, and therefore under the situation that pixel capacitance is confirmed, there is a voltage relationship in the voltage of the voltage of main pixel 620 and time pixel 630; When causing pixel to show high gray; Main pixel 620 can show main grey scale signal, and inferior pixel 630 is owing to showing that less important grey scale signal (becoming certain ratio with main grey scale signal, less than main grey scale signal) also can brighten; Can't keep normal black, cause and when 3D shows, can't realize real black matrix signal.

So, be necessary to provide a kind of LCD, to solve the existing in prior technology problem.

The utility model content

The purpose of the utility model is to provide a kind of LCD, when watching 3D rendering, is prone to produce crosstalk phenomenon and brightness descends when influencing display quality or watching two dimensional image problem with the LCD that solves prior art.

For addressing the above problem, the technical scheme that the utility model provides is following:

A kind of LCD comprises: be used for the pixel of display frame grey scale signal, be used for the data line that transmission of data signals is given said pixel, and be used to control first switching tube that said pixel is opened; Said pixel comprise one be used to show main grey scale signal main pixel and be used to show the inferior pixel of less important grey scale signal; Said LCD also comprises: be used for a pair of pixel capacitance that the grey scale signal voltage of main pixel described in the same frame picture and said pixel is redistributed, and be used to control the said second switch pipe of redistributing operation; Said LCD also comprises the 3rd switching tube that is used to control said pixel unlatching.

In an embodiment of the utility model, said first control end of switching tube is connected with sweep trace, and the input end of said first switching tube is connected with data line, and said first output end of switching tube is connected with said pixel with said main pixel respectively.

In an embodiment of the utility model; The control end of said second switch pipe is connected with sweep trace; The input end of said second switch pipe is connected with said main pixel through said pixel capacitance, and the output terminal of said second switch pipe is connected with said pixel through said pixel capacitance.

In an embodiment of the utility model; Said LCD also comprises: the control module of controlling said the 3rd switching tube conducting; Said control module is connected with said the 3rd control end of switching tube; The input end of said the 3rd switching tube is connected with the black matrix signal, and said the 3rd output end of switching tube is connected with said pixel.

A kind of LCD comprises: be used for the pixel of display frame grey scale signal, be used for the data line that transmission of data signals is given said pixel, and be used to control first switching tube that said pixel is opened; Said pixel comprise one be used to show main grey scale signal main pixel and be used to show the inferior pixel of less important grey scale signal; Said LCD also comprises: be used for a pair of pixel capacitance that the grey scale signal voltage of main pixel described in the same frame picture and said pixel is redistributed, and be used to control the said second switch pipe of redistributing operation; Said LCD also comprises the 3rd switching tube that is used to control said main pixel unlatching.

In an embodiment of the utility model; Said LCD also comprises: the control module of controlling said the 3rd switching tube conducting; Said control module is connected with said the 3rd control end of switching tube; The input end of said the 3rd switching tube is connected with the black matrix signal, and said the 3rd output end of switching tube is connected with said main pixel.

The utility model has when watching 3D rendering compared to existing LCD and is prone to produce crosstalk phenomenon and brightness descends when influencing display quality or watching two dimensional image problem, and the LCD of the utility model reaches the effect that crosstalk phenomenon when reducing to watch 3D rendering does not have brightness decay when watching two dimensional image through the unlatching of controlling main pixel or inferior pixel.

For letting the foregoing of the utility model can be more obviously understandable, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows:

Description of drawings

Fig. 1 is the structural representation of the LCD of prior art;

Fig. 2 is the panel signal graph of the LCD of prior art;

Fig. 3 is provided with the structural representation of the LCD of black matrix for the phase delay chip of prior art;

Fig. 4 is provided with the structural representation of the LCD of black matrix signal for the picture signal of prior art;

Fig. 5 is provided with another structural representation of the LCD of black matrix signal for the picture signal of prior art;

Fig. 6 is the pixel-driven structure synoptic diagram of CS display mode of the LCD of prior art;

Fig. 7 is the signal potential synoptic diagram of the various signals of preferred embodiment when 2D shows of the LCD of the utility model.

Fig. 8 is the pixel-driven structure synoptic diagram of CS display mode of first preferred embodiment of the LCD of the utility model;

Fig. 9 is the electrical block diagram of CS display mode of first preferred embodiment of the LCD of the utility model;

Figure 10 is the signal potential synoptic diagram of the various signals of first preferred embodiment when 3D shows of the LCD of the utility model;

Figure 11 is the pixel-driven structure synoptic diagram of CS display mode of second preferred embodiment of the LCD of the utility model;

Figure 12 is the electrical block diagram of CS display mode of second preferred embodiment of the LCD of the utility model;

Figure 13 is the signal potential synoptic diagram of the various signals of second preferred embodiment when 3D shows of the LCD of the utility model.

Embodiment

Below the explanation of each embodiment be with reference to additional graphic, can be in order to illustration the utility model in order to the specific embodiment of implementing.The direction term that the utility model is mentioned, for example " on ", D score, " preceding ", " back ", " left side ", " right side ", " interior ", " outward ", " side " etc., only be direction with reference to annexed drawings.Therefore, the direction term of use is in order to explanation and understands the utility model, but not in order to restriction the utility model.

In the drawings, the unit of structural similarity is to represent with same numeral.

See also Fig. 8 and Fig. 9, the pixel-driven structure synoptic diagram of the CS display mode of first preferred embodiment of the LCD of shown in Figure 8 is the utility model, Fig. 9 is the electrical block diagram of the LCD of Fig. 8.LCD 800 comprises pixel, data line 810 and first switching tube 840.Pixel is used for the display frame grey scale signal, and data line 810 is used for transmission of data signals and gives pixel, and first switching tube 840 is used to control the unlatching of pixel.Pixel comprise one be used to show main grey scale signal main pixel 820 and be used to show the inferior pixel 830 of less important grey scale signal, LCD 800 also comprises a pair of pixel capacitance C1 and C2 and second switch pipe 850.When second switch pipe 850 is opened; Main pixel 820 is passed through this to pixel capacitance C1 and C2 conducting with time pixel 830; The current potential meeting of main like this pixel 820 and time pixel 830 is redistributed according to the ratio of the capacitance of two electric capacity; The voltage of the voltage of final main pixel 820 and time pixel 830 forms a voltage relationship, thereby makes two pixels reach the wide viewing angle of different optical characteristics to realize showing.

In order to reduce crosstalk phenomenon, the LCD 800 of the utility model comprises that also control module (not shown) and the 3rd switching tube 860, the three switching tubes 860 are used to control the unlatching of time pixel 830.LCD comprises that also control module is connected with the control end of the 3rd switching tube 860 through sweep trace G3, in order to control 860 conductings of the 3rd switching tube.The input end of the 3rd switching tube 860 is connected with a fixed voltage end, and the output terminal of the 3rd switching tube 860 is connected with time pixel 830.This fixed voltage end is used to provide a fixed voltage signal, and preferably, this fixed voltage signal is a common signal (COM).

Please consult Fig. 7, Fig. 8 and Fig. 9 in the lump; When the LCD 800 that uses the utility model carries out the demonstration of 2D image; Owing to do not need the generation of crosstalk phenomenon; Therefore the 3rd switching tube 860 breaks off always, makes the fixed voltage signal can not transfer to time pixel 830 via the 3rd switching tube 860.When showing the 2D image,, the signal of data line 810 is sent to main pixel 820 and time pixel 830 earlier with 840 conductings of first switching tube (by sweep trace G1 control).With 850 conductings of second switch pipe (by sweep trace G2 control), driving voltage is redistributed between main pixel 820 and inferior pixel 830 then through corresponding pixel capacitance C1 and C2.The ON time of first switching tube 840 drops in the high potential signal of data line 810; Can guarantee the normal demonstration of 2D signal of video signal like this, the grey scale signal of main pixel 820 demonstrates different grey scale signal driving voltages to reach better display effect with the grey scale signal of time pixel 830 through pixel capacitance C1 and C2.Main pixel 820 and time pixel 830 can the same normal demonstrations 2D images with the LCD of prior art, make two pixels reach different optical characteristics to realize the wide viewing angle of demonstration

Please consult Fig. 8, Fig. 9 and Figure 10 in the lump; When the LCD 800 that uses the utility model carries out the demonstration of 3D image, the 3rd switching tube 860 conducting always, at this moment common signal can output to time pixel 830 through the 3rd switching tube 860; At this moment be equivalent on the position of inferior pixel 830, produce the black matrix signal; And this black matrix signal can not receive the influence of the grey scale signal of main pixel 820, can realize normal fully black black matrix signal, really reaches the purpose that reduces crosstalk phenomenon.When showing the 3D image, when data line 810 transmission 3D grey scale signals, first switching tube 840 and 850 conductings of second switch pipe at this moment, at this moment main pixel 820 and time pixel 830 normal display image signals.When said data line 810 transmission 3D grey scale signals finish; At this moment first switching tube 840 breaks off with second switch pipe 850; The 3rd switching tube 860 conductings (by sweep trace G3 control), at this moment time pixel 830 shows the black matrix signal, has realized normal fully black black matrix signal; The part that shows exactly inferior pixel 830 on the LCD presents dark attitude always, through interval demonstration the having reduced crosstalk phenomenon of black matrix signal and grey scale signal.Crosstalk phenomenon when therefore the LCD 800 of the utility model can well reduce the demonstration of 3D image, the brightness in the time of can not having influence on the demonstration of 2D image simultaneously again.

The utility model also relates to a kind of LCD; See also Figure 11 and Figure 12; The pixel-driven structure synoptic diagram of the CS display mode of second preferred embodiment of the LCD of shown in Figure 11 is the utility model; Figure 12 is the electrical block diagram of the LCD of Figure 11, and LCD 1100 comprises pixel, data line 1110 and first switching tube 1140.Pixel is used for the display frame grey scale signal, and data line 1110 is used for transmission of data signals and gives pixel, and first switching tube 1140 is used to control the unlatching of pixel.Pixel comprise one be used to show main grey scale signal main pixel 1120 and be used to show the inferior pixel 1130 of less important grey scale signal, LCD 1100 also comprises a pair of pixel capacitance C1 and C2 and second switch pipe 1150.When second switch pipe 1150 is opened; Main pixel 1120 and time pixel 1130 are through a pair of pixel capacitance C1 and C2 conducting; The current potential meeting of main like this pixel 1120 and time pixel 1130 is redistributed according to the ratio of the capacitance of two electric capacity; The voltage of the voltage of final main pixel 1120 and time pixel 1130 forms a voltage relationship, thereby makes two pixels reach the wide viewing angle of different optical characteristics to realize showing.

In order to reduce crosstalk phenomenon, the LCD 1100 of the utility model comprises that also control module (not shown) and the 3rd switching tube 1160, the three switching tubes 1160 are used to control the unlatching of main pixel 1120.LCD comprises that also control module is connected with the control end of the 3rd switching tube 1160 through sweep trace G3, in order to control 1160 conductings of the 3rd switching tube.The input end of the 3rd switching tube 1160 is connected with a fixed voltage end, and the output terminal of the 3rd switching tube 1160 is connected with main pixel 1120.This fixed voltage end is used to provide a fixed voltage signal, and preferably, this fixed voltage signal is a common signal (COM).

Please consult Fig. 7, Figure 11 and Figure 12 in the lump; When the LCD 1100 that uses the utility model carries out the demonstration of 2D image; Owing to do not need the generation of crosstalk phenomenon; Therefore the 3rd switching tube 1160 breaks off always, makes the fixed voltage signal can not transfer to main pixel 1120 via the 3rd switching tube 1160.When showing the 2D image,, the signal of data line 1110 is sent to main pixel 1120 and time pixel 1130 earlier with 1140 conductings of first switching tube (by sweep trace G1 control).With 1150 conductings of second switch pipe (by sweep trace G2 control), driving voltage is redistributed between main pixel 1120 and inferior pixel 1130 then through corresponding pixel capacitance C1 and C2.The ON time of first switching tube 1140 drops in the high potential signal of data line 1110; Can guarantee the normal demonstration of 2D signal of video signal like this, the grey scale signal of main pixel 1120 demonstrates different grey scale signal driving voltages to reach better display effect with the grey scale signal of time pixel 1130 through pixel capacitance C1 and C2.Main pixel 1120 and time pixel 1130 can the same normal demonstrations 2D images with the LCD of prior art, make two pixels reach different optical characteristics to realize the wide viewing angle of demonstration.

Please consult Figure 11, Figure 12 and Figure 13 in the lump; When the LCD 1100 that uses the utility model carries out the demonstration of 3D image, the 3rd switching tube 1160 conducting always, at this moment common signal can output to main pixel 1120 through the 3rd switching tube 1160; At this moment be equivalent on the position of main pixel 1120, produce the black matrix signal; And this black matrix signal can not receive the influence of the grey scale signal of time pixel 1130, can realize normal fully black black matrix signal, really reaches the purpose that reduces crosstalk phenomenon.When showing the 3D image, when data line 1110 transmission 3D grey scale signals, first

switching tube

1140 and 1150 conductings of second switch pipe at this moment, at this moment main pixel 1120 and time pixel 1130 normal display image signals.When said data line 1110 transmission 3D grey scale signals finish; At this moment first switching tube 1140 breaks off with second switch pipe 1150; The 3rd switching tube 1160 conductings (by sweep trace G3 control), at this moment main pixel 1130 shows the black matrix signal, has realized normal fully black black matrix signal; Showing on the LCD is exactly that the part of main pixel 1130 presents dark attitude always, and the interval through black matrix signal and grey scale signal shows and reduced crosstalk phenomenon.Crosstalk phenomenon when therefore the LCD 1100 of the utility model can well reduce the demonstration of 3D image, the brightness in the time of can not having influence on the demonstration of 2D image simultaneously again.

In sum; Though the utility model discloses as above with preferred embodiment; But above-mentioned preferred embodiment is not that those of ordinary skill in the art is in spirit that does not break away from the utility model and scope in order to restriction the utility model; All can do various changes and retouching, so the protection domain of the utility model is as the criterion with the scope that claim defines.

Claims

1. a LCD comprises: be used for the pixel of display frame grey scale signal, be used for the data line that transmission of data signals is given said pixel, and be used to control first switching tube that said pixel is opened;

Said pixel comprise one be used to show main grey scale signal main pixel and be used to show the inferior pixel of less important grey scale signal; Said LCD also comprises: be used for a pair of pixel capacitance that the grey scale signal voltage of main pixel described in the same frame picture and said pixel is redistributed, and be used to control the said second switch pipe of redistributing operation; It is characterized in that,

Said LCD also comprises the 3rd switching tube that is used to control said pixel unlatching.

2. LCD according to claim 1; It is characterized in that; Said first control end of switching tube is connected with sweep trace, and the input end of said first switching tube is connected with data line, and said first output end of switching tube is connected with said pixel with said main pixel respectively.

3. LCD according to claim 1; It is characterized in that; The control end of said second switch pipe is connected with sweep trace; The input end of said second switch pipe is connected with said main pixel through said pixel capacitance, and the output terminal of said second switch pipe is connected with said pixel through said pixel capacitance.

4. LCD according to claim 1; It is characterized in that; Said LCD also comprises: the control module of controlling said the 3rd switching tube conducting; Said control module is connected with said the 3rd control end of switching tube, and the input end of said the 3rd switching tube is connected with the black matrix signal, and said the 3rd output end of switching tube is connected with said pixel.

5. a LCD comprises: be used for the pixel of display frame grey scale signal, be used for the data line that transmission of data signals is given said pixel, and be used to control first switching tube that said pixel is opened;

Said LCD also comprises the 3rd switching tube that is used to control said main pixel unlatching.

6. LCD according to claim 5; It is characterized in that; Said first control end of switching tube is connected with sweep trace, and the input end of said first switching tube is connected with data line, and said first output end of switching tube is connected with said pixel with said main pixel respectively.

7. LCD according to claim 5; It is characterized in that; The control end of said second switch pipe is connected with sweep trace; The input end of said second switch pipe is connected with said main pixel through said pixel capacitance, and the output terminal of said second switch pipe is connected with said pixel through said pixel capacitance.

8. LCD according to claim 5; It is characterized in that; Said LCD also comprises: the control module of controlling said the 3rd switching tube conducting; Said control module is connected with said the 3rd control end of switching tube, and the input end of said the 3rd switching tube is connected with the black matrix signal, and said the 3rd output end of switching tube is connected with said main pixel.