TWI386740B - Liquid crystal display device and image display method thereof - Google Patents

Description

Liquid crystal display device and image display method thereof

The present invention relates to a liquid crystal display device and an image display method thereof.

The liquid crystal display device has the advantages of light weight, low power consumption, low radiation, etc., and thus has gradually replaced the conventional cathode ray tube display device and is applied to many kinds of electronic products such as a notebook computer, a liquid crystal television, and a liquid crystal screen. Wait.

In the liquid crystal display device, since the liquid crystal display device uses the characteristics that the liquid crystal molecules have different polarization or refraction effects on the light in different arrangement states, the amount of light penetration is controlled, thereby enabling the liquid crystal display device to generate rich images. . However, when a liquid crystal display device plays a moving image, it often occurs that the outline of the image is blurred or the image is smeared. This is because the reaction speed of the liquid crystal itself is slow, and since the liquid crystal display device is in a hold-type light-emitting mode, when the user views the motion image played by the liquid crystal display device, it is often caused by a person. The integral behavior pattern of the eye causes the display screen to have an edge blur problem.

Please refer to FIG. 1. FIG. 1 is a partial equivalent circuit diagram of a conventional liquid crystal display device 1. The liquid crystal display device 1 includes a switch unit 16, a liquid crystal capacitor 151, a storage capacitor 152, at least one data line 12, at least one scan line 11, a storage electrode line 14, and a common electrode line 13. In addition, the liquid crystal display device 1 further includes a data line driving circuit 17 and a scan line driving circuit 18 for use in conjunction therewith.

The switch unit 16 has a gate 161, a source 162 and a drain 163. The gate 161 is electrically connected to the scan line 11 , the source 162 is electrically connected to the data line 12 , and the drain 163 is electrically connected to the liquid crystal capacitor 151 and the storage capacitor 152 . The data line driving circuit 17 is electrically connected to the data line 12, and provides an image data to the liquid crystal capacitor 151 and the storage capacitor 152 via the data line 12 and the switch unit 16. The scan line driving circuit 18 is electrically connected to the scan line 11 and provides a driving voltage to control the switching unit 16 via the scan line 11.

The liquid crystal capacitors 151 are electrically connected to the common electrode line 13, the drain 163 and the storage capacitor 152, respectively, and the storage capacitor 152 is electrically connected to the storage electrode line 14, the drain 163 and the liquid crystal capacitor 151, respectively. Further, the storage electrode line 14 and the common electrode line 13 respectively transmit a common voltage.

When the scan line driving circuit 18 transmits a driving voltage to the scanning line 11 and turns on the switching unit 16, the data line driving circuit 17 transmits an image data to the liquid crystal capacitor 151 through the data line 12. In addition, the storage capacitor 152 stores a voltage to compensate for leakage current generated by the switching unit 16 in the liquid crystal display device 1 to maintain the voltage of the liquid crystal display device 1 stable.

In the above, the frequency of displaying the image frame of the liquid crystal display device is usually 60 Hz, and in order to solve the problem of the edge afterimage of the liquid crystal display device, it is conventional practice to insert a picture between adjacent image frames. Black image. However, in order for the human eye not to feel the flicker of the picture, the clock frequency of the data line driving circuit responsible for providing the image data must be doubled, that is, the image frame time of the liquid crystal display device must be multiplied by the original frequency of 60 Hz. The frequency is 120Hz. Such a data line driving circuit with a high clock frequency is not easy to manufacture, and there is a problem that the twisting time of the liquid crystal molecules is insufficient.

In addition, inserting a black screen between adjacent image frames will fix the black-inset-ratio to 50%, that is, the liquid crystal display device must display a black screen halfway. This causes the brightness of the liquid crystal display device to be lowered, and the black picture insertion rate of 50% is not the most suitable ratio for the human eye. Therefore, how to provide a liquid crystal display device which does not require frequency doubling and which can improve the edge afterimage problem of a liquid crystal display device is one of the current important issues.

In view of the above problems, an object of the present invention is to provide a liquid crystal display device capable of eliminating edge residual images and an image display method therefor.

In order to achieve the above object, a liquid crystal display device according to the present invention comprises a scan line, a data line, an auxiliary electrode line, a pixel capacitor, a first switching unit and a second switching unit. The data line is perpendicular to the scan line and the auxiliary electrode line is parallel to the data line, and the pixel capacitance is set near the intersection of the scan line and the data line. The first switching unit is electrically connected to the scan line, the data line and the pixel capacitor respectively, wherein a first sub-image data is transmitted from the data line to the pixel capacitor via the first switching unit; and the second switching unit is respectively connected to the auxiliary electrode The line, the scan line and the pixel capacitor are electrically connected, wherein a second sub-image data is transmitted from the scan line to the pixel capacitor via the second switch unit.

In order to achieve the above object, another liquid crystal display device according to the present invention comprises a first scan line, a second scan line, a data line, an auxiliary electrode line, a pixel capacitor, a first switch unit and a The second switching unit. The second scan line is parallel to the first scan line, the data line is perpendicular to the first scan line, the auxiliary electrode line is parallel to the data line, and the pixel capacitance is set on the first scan line and the data line. Near the intersection. The first switching unit is electrically connected to the first scan line, the data line and the pixel capacitor, wherein a first sub-image data is transmitted from the data line to the pixel capacitor via the first switching unit. The second switching unit is electrically connected to the auxiliary electrode line, the second scanning line and the pixel capacitor, wherein a second image data is transmitted from the second scanning line to the pixel capacitor via the second switching unit.

In addition, in order to achieve the above object, an image display method for a liquid crystal display device according to the present invention is performed at an image frame time, wherein the image frame time is divided into a first sub-image frame time and a second Sub-image frame time. The image display method includes the steps of: transmitting a first sub-image data to a pixel capacitor via a first switching unit at a first sub-picture frame time; and transmitting the second sub-picture frame time via a second switching unit at a second sub-picture frame time A second sub-image data to the pixel capacitor.

As described above, according to the liquid crystal display device and the image display method thereof according to the present invention, the black switch data is written by the second switch unit, which not only improves the problem of the edge afterimage, but also eliminates the need for the data line drive circuit. The multiplier can be inserted into the black screen, so that the cost of the liquid crystal display device can be reduced, and the display time ratio between the image data and the black screen material can be adjusted.

Hereinafter, a liquid crystal display device and an image display method thereof according to a preferred embodiment of the present invention will be described with reference to the related drawings.

Please refer to FIG. 2. FIG. 2 is a partial equivalent circuit diagram of a liquid crystal display device 2 according to a preferred embodiment of the present invention. The liquid crystal display device 2 includes a scan line 21, a data line 22, a common electrode line 23, a storage electrode line 24, a pixel capacitor 25, a first switching unit 26 and a second switching unit 27.

In the embodiment, the liquid crystal display device 2 further includes a data line driving circuit and a scan line driving circuit (not shown). The data line driving circuit is electrically connected to the data line 22 and provides a first sub-image data to the pixel capacitor 25. The scan line driving circuit is electrically connected to the scan line 21 and can provide a second sub-image data to the pixel capacitor 25. The second sub-image data is a black screen material. In a normally black liquid crystal display device, the voltage value of the second sub-image data is approximately equal to a common voltage voltage; in the normally white liquid crystal display device, the second sub-image data The voltage value is approximately equal to the voltage value of the dark state.

Next, the first switching unit 26 is electrically connected to the scan line 21, the data line 22, and the pixel capacitor 25, respectively. The second switching unit 27 is electrically connected to the scan line 21, the storage electrode line 24, and the pixel capacitor 25, respectively.

The pixel capacitor 25 has a liquid crystal capacitor 251 and a storage capacitor 252. The liquid crystal capacitor 251 is electrically connected to the first switch unit 26, the second switch unit 27 and the common electrode line 23, respectively; the storage capacitor 252 is electrically connected to the first switch unit 26, the second switch unit 27 and the storage electrode line 24, respectively. connection.

In this embodiment, the first switching unit 26 and the second switching unit 27 are, for example but not limited to, a thin film transistor. Therefore, the first switching unit 26 has a first gate 261, a first source 262 and a first drain 263. The first gate 261 is electrically connected to the scan line 21; the first source 262 is electrically connected to the data line 22; and the first drain 263 is electrically connected to the pixel capacitor 25. The second switching unit 27 has a second gate 271, a second source 272 and a second drain 273. The second gate 271 is electrically connected to the storage electrode line 24; the second source 272 is electrically connected to the scan line 21; and the second drain 273 is electrically connected to the pixel capacitor 25 and the first drain 263.

In the present embodiment, the common electrode line 23 transmits a common voltage, and the storage electrode line 24 can transmit a storage voltage or an auxiliary voltage, and the storage voltage can also be equal to a common voltage.

Please refer to FIG. 3A to FIG. 3C simultaneously, between an image frame time t ₀ ~ t _f (as shown in FIG. 3A ), wherein the image frame time t ₀ ~t _f is divided into a first sub image. Frame time t ₀ ~ t _1f and a second sub-picture frame time t _1f ~ t _f (as shown in FIG. 3B ), and the image frame time is the image frame time of frequency 60 Hz.

Hereinafter, please refer to FIG. 2 and FIG. 3A to FIG. 3C simultaneously, the operation of the liquid crystal display device 2 is as follows: t ₀ ~ t ₁ between the first sub-frame frame time t ₀ ~ t _1f , the scan line drive The circuit provides a drive voltage (as shown in FIG. 3A) and turns on the first switching unit 26 via the scan line 21. At the same time, the data line driving circuit provides a first sub-picture data to the data line 22 and is transmitted to the pixel capacitor 25 via the first switching unit 26. Then, between t ₁ and t _{1f of the} first sub-frame time t ₀ ~ t _1f , the scan line driving circuit maintains an appropriate voltage to turn off the first switching unit 26 (as shown in FIG. 3A ). The first sub-image data stored by the pixel capacitor 25 will twist the liquid crystal molecules and cooperate with the backlight to generate an image. Between the first sub-frame time t ₀ ~ t _1f , the storage electrode line 24 maintains a storage voltage (as shown in FIG. 3B).

In addition, _a change in the pixel voltage V _a of the pixel capacitor 25 (as shown in FIG. 3C ) is caused by a voltage drop f _t after the first switching unit 26 is turned off (ie, after t ₁ ) because the first switch The first gate 261 of the unit 26 and the first drain 263 have a parasitic capacitance. Therefore, when the first switching unit 26 is turned off, V _a is also slightly lowered due to the effect of parasitic capacitance.

Next, at the second sub-frame time t _1f ~ t _f , the storage electrode line 24 transmits an auxiliary voltage to the second switching unit 27 (as shown in FIG. 3B ) to turn on the second switching unit 27 . And between t _1f ~ t _{2 of the} second sub-frame time t _1f ~ t _f , the scan line driving circuit provides a second sub-image data to the scan line 21 , wherein the liquid crystal in the normally dark state In the display device, the voltage value of the second sub-image data is approximately equal to the common voltage (as shown in FIG. 3A), and is transmitted to the pixel capacitor 25 via the second switching unit 27. In addition, between the second sub-frame time t _1f ~ t _f , since the reference voltage of one end of the storage capacitor 252 must be maintained, so that the second sub-image data can be stored, the storage electrode line 24 needs to continuously provide assistance. The voltage (as shown in FIG. 3B) causes the second switching unit 27 to maintain the on state during this period of time, and the scan line driving circuit continuously supplies the second sub-picture data (black picture data) to the pixel capacitor 25, so as to avoid The voltage of the pixel capacitor 25 is changed because the voltage at one end of the storage capacitor 252 is changed.

In summary, between the first sub-image frame time t ₀ to t _1f , the liquid crystal display device 2 displays the normal picture with the operation of the backlight module, and the second sub-picture frame time t _1f to t Between _f , the liquid crystal display device 2 displays a black screen in conjunction with the operation of the backlight module. In addition, the liquid crystal display device 2 can adjust the frequency of the first sub-picture frame time and the second sub-picture frame time to match the frequency of the 60 Hz image frame time in accordance with the frequency of the black picture to be inserted.

As described above, after the image frame time t _f , the operation of the image frame time t ₀ to t _f is repeated, but it should be noted that in the next frame time, the liquid crystal display device 2 can adopt a relative The negative voltage of the common voltage is driven (as shown in Figure 3C).

Next, please refer to FIG. 4. FIG. 4 is a partial equivalent circuit diagram of a liquid crystal display device 3 according to another preferred embodiment of the present invention. The liquid crystal display device 3 includes a scan line 31, a data line 32, a common electrode line 33, a storage electrode line 34, an auxiliary electrode line 38, a pixel capacitor 35, a first switching unit 36, and a second Switch unit 37.

In the embodiment, the liquid crystal display device 3 further includes a data line driving circuit and a scan line driving circuit (not shown). The operation and function of the data line driving circuit and the scanning line driving circuit are the same as those of the liquid crystal display device 2 of the above embodiment, and thus will not be described herein. In addition, the connection relationship and function of the pixel capacitor 35 and the pixel capacitor 25 of the above embodiment are the same, and therefore will not be described herein.

Next, the first switch unit 36 is electrically connected to the scan line 31, the data line 32, and the pixel capacitor 35, respectively. The second switching unit 37 is electrically connected to the scan line 31, the auxiliary electrode line 38, and the pixel capacitor 35, respectively.

In this embodiment, the first switching unit 36 and the second switching unit 37 are, for example but not limited to, a thin film transistor. The connection relationship of the first switch unit 36 is the same as that of the first switch unit 26 of the above embodiment, and therefore will not be described herein. It should be noted that the second switch unit 37 has a second gate 371, a second source 372, and a second drain 373. The second gate 371 is electrically connected to the auxiliary electrode line 38; the second source 372 is electrically connected to the scan line 31; and the second drain 373 is electrically connected to the pixel capacitor 35 and the first drain 363. .

In the present embodiment, the common electrode line 33 and the storage electrode line 34 respectively transmit a common voltage, and the auxiliary electrode line 38 transmits an auxiliary voltage. Of course, depending on the design, the common electrode line 33 can transmit a common voltage, and the storage electrode line 34 can transmit a stored voltage.

Referring to FIG. 5A to FIG. 5C simultaneously, an image frame time t ₀ '~t _f ' is divided into a first sub-picture frame time t ₀ '~t _1f ' (as shown in FIG. 5A ) and a The second sub-picture frame time t _1f '~t _f ' (as shown in FIG. 5B ), and the image frame time t ₀ '~t _f ' is the image frame time of frequency 60 Hz.

Hereinafter, please refer to FIG. 4 and FIG. 5A to FIG. 5C simultaneously, the operation of the liquid crystal display device 3 is as follows: between the first sub-frame frame time t ₀ '~t _1f ', the operation of the liquid crystal display device 3 and the above The liquid crystal display device 2 of the embodiment is the same, and therefore will not be described again. Then, between t _1f '~t ₂ ' of the second sub-frame time t _1f '~t _f ', the auxiliary electrode line 38 transmits an auxiliary voltage to the second switching unit 37 (as shown in FIG. 5B). The second switching unit 37 is turned on, and the scan line driving circuit supplies a second sub-image data to the scan line 31 and is transmitted to the pixel capacitor 35 via the second switching unit 37. Then, between t ₂ '~t _f ' of the second sub-frame time t _1f '~t ₂ ', the second sub-image data (black picture data) stored by the pixel capacitor 35 will twist and match the liquid crystal molecules The backlight acts to create a black picture. Further, since the auxiliary electrode line 38 and the actuator 31 for the scan lines, the pixel capacitance change in the voltage V _b of one pixel 35 shown in Figure 5C.

In summary, between the first sub-image frame time t ₀ ' to t _1f ', the liquid crystal display device 3 displays the normal picture with the operation of the backlight module, and the second sub-picture frame time t _1f between 'to t _f', the liquid crystal display device with the backlight module 3 system is actuated to display a black screen. In addition, the liquid crystal display device 3 can adjust the frequency of the first sub-picture frame time and the second sub-picture frame time to match the frequency of the 60 Hz image frame time in accordance with the frequency of the black picture to be inserted.

After the image frame time t _f ', the image frame time t ₀ ' to t _f ' is repeated, but it should be noted that in the next frame time, the liquid crystal display device 3 can adopt one. The negative polarity voltage is driven relative to the common voltage (as shown in Figure 5C).

Please refer to FIG. 6. FIG. 6 is a partial equivalent circuit diagram of a liquid crystal display device 4 according to another preferred embodiment of the present invention. The liquid crystal display device 4 includes a first scan line 41, a second scan line 42, a data line 43, a common electrode line 44, a storage electrode line 45, an auxiliary electrode line 46, a pixel capacitor 47, A first switching unit 48 and a second switching unit 49.

In the embodiment, the liquid crystal display device 4 further includes a data line driving circuit and a scan line driving circuit (not shown). The operation and function of the data line driving circuit and the scanning line driving circuit are the same as those of the liquid crystal display device 2 of the above embodiment, and thus will not be described herein. In addition, the connection relationship and function of the pixel capacitor 47 and the pixel capacitor 25 of the above embodiment are the same, and therefore will not be described herein.

Next, the first switching unit 48 is electrically connected to the first scan line 41, the data line 43, and the pixel capacitor 47, respectively. The second switch unit 49 is electrically connected to the second scan line 42, the auxiliary electrode line 46 and the pixel capacitor 47, respectively.

In this embodiment, the first switching unit 48 and the second switching unit 49 are, for example but not limited to, a thin film transistor. Since the connection relationship between the first switch unit 48 and the first switch unit 26 of the above embodiment is the same, it will not be described herein. It should be noted that the second switch unit 49 has a second gate 491, a second source 492 and a second drain 493. The second gate 491 is electrically connected to the auxiliary electrode line 46; the second source 492 is electrically connected to the second scan line 42; the second drain 493 is connected to the pixel capacitor 47 and the first drain 483. Electrical connection.

In the present embodiment, the common electrode line 44 and the storage electrode line 45 respectively transmit a common voltage, and the auxiliary electrode line 46 transmits an auxiliary voltage. Of course, depending on the design, the common electrode line 44 can transmit a common voltage, and the storage electrode line 45 can transmit a stored voltage.

Referring to FIG. 7A to FIG. 7D simultaneously, an image frame time t ₀ ′′~t _f ′′ is divided into a first sub-image frame time t ₁ ′′~t _1f ” (as shown in FIG. 7A ) and a The second sub-frame time t _1f ”~t _f ” (as shown in FIGS. 7B and 7C ), and the image frame time is the image frame time of frequency 60 Hz.

Hereinafter, please refer to FIG. 6 and FIG. 7A to FIG. 7D simultaneously, the operation of the liquid crystal display device 4 is as follows: between the first sub-frame frame time t ₀ ′′~t _1f ′′, the operation of the liquid crystal display device 4 and the above The liquid crystal display device 2 of the embodiment is the same, and therefore will not be described again. Then, between t _1f ′′~t ₂ ′ of the second sub-frame time t _1f ”~t _f ”, the auxiliary electrode line 46 transmits an auxiliary voltage to the second switching unit 49 to make the second switching unit 49 is turned on (as shown in Figure 7C). At the same time, the second scan line 42 provides a second sub-picture data (black picture data) to the second switch unit 49 and to the pixel capacitor 47 (as shown in FIG. 7B). Then, between t ₂ ′~t _f ′ of the second sub-frame time t _1f ”~t _f ”, the second sub-image data (black picture data) stored by the pixel capacitor 47 will twist the liquid crystal molecules and match the backlight. The role of the source to produce a black picture. Further, since the auxiliary electrode line 46, a first scan line and the second scan lines 41 for the actuator 42, so that the pixel supply voltage V _c changes the capacitance of one pixel 47 shown in Figure 7D.

In summary, between the first sub-image frame time t ₀ ′′ to t _1f ′′, the liquid crystal display device 4 displays the normal picture with the operation of the backlight module, and at the image frame time t _1f ” to t Between " _f ", the liquid crystal display device 4 displays a black screen in conjunction with the operation of the backlight module. In addition, the liquid crystal display device 4 can adjust the frequency of the first sub-picture frame time and the second sub-picture frame time in accordance with the frequency of the black picture to be inserted, and complete the time in the image frame time of 60 Hz. Moreover, since the first sub-picture frame time and the second sub-picture frame time cooperate to insert a black picture between the two image data, the data driving circuit does not need to multiply.

Incidentally, in each frame time, the black screen data provided by each scan line is supplied to the pixel capacitance of the upper stage, so that the image displayed by the liquid crystal display device has a linkage effect.

Similarly, after the image frame time t _f ", the image frame time t ₀ " to t _f " is repeated, but it should be noted that in the next frame time, the liquid crystal display device 4 adopts a relative commonality. The negative voltage of the voltage is driven (as shown in Figure 7D).

Next, please refer to FIG. 8 , which is a flowchart of an image display method of a liquid crystal display device according to a preferred embodiment of the present invention, which includes steps S01 to S02 . It should be noted that the image display method of the liquid crystal display device of the preferred embodiment of the present invention can be applied to the above liquid crystal display device 2, 3 or 4. Hereinafter, the flow chart of the image display method will be described by taking the liquid crystal display device 2 as an example.

The image display method is performed at an image frame time t ₀ ~ t _f , and the image frame time is divided into a first sub-image frame time t ₀ ~ t _1f and a second sub image frame time t _1f ~ t _f .

In step S01, a first sub-image data is transmitted to the pixel capacitor 25 via the first switching unit 26 at the first sub-frame time t ₀ ~ t _1f .

In step S02, a second sub-image data is transmitted to the pixel capacitor 25 via the second switching unit 27 at the second sub-frame time t _1f to t _f .

The features and details of the above steps S01 to S02 have been disclosed in the above embodiments of the liquid crystal display device, and thus will not be described again.

In summary, according to the liquid crystal display device of the present invention, the black image is inserted by the second switching element, the problem of the edge afterimage can be improved, and the data line driving circuit can be inserted into the black screen without multiplying the frequency. In addition, it can better match the needs of the human eye and adjust the display frequency of the black screen so that the user can feel the better image. Therefore, the cost of the liquid crystal display device can be reduced, the display screen of the liquid crystal display device can be improved, and the display screen can be more perfect.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

1, 2, 3, 4. . . Liquid crystal display device

11, 21, 31. . . Sweep line

17. . . Data line driver circuit

18. . . Sweep line drive circuit

41. . . First scan line

12, 22, 32, 43. . . Data line

42. . . Second scan line

13, 23, 33, 44. . . Common electrode line

14, 24, 34, 45. . . Storage electrode line

38, 46. . . Auxiliary electrode line

25, 35, 47. . . Pixel capacitance

151, 251, 351, 471. . . Liquid crystal capacitor

152, 252, 352, 472. . . Storage capacitor

16. . . Switch unit

161. . . Gate

162. . . Source

163. . . Bungee

26, 36, 48. . . First switch unit

261, 361, 481. . . First gate

262, 362, 482. . . First source

263, 363, 483. . . First bungee

27, 37, 49. . . Second switching unit

271, 371, 491. . . Second gate

272, 372, 492. . . Second source

273, 373, 493. . . Second bungee

V _a , V _b , V _c . . . Pixel voltage

S01~S02. . . Image display step

f _t . . . Pressure drop

t ₀ ~t _f , t ₀ '~t _f ', t ₀ ′~t _f ”. . . Image frame time

t ₀ ~ t _1f , t ₀ '~t _1f ', t ₀ ′~t _1f ”. . . First sub-frame time

t _1f ~t _f , t _1f '~t _f ', t _1f ”~t _f ”. . . Second sub-frame time

1 is a schematic diagram of a conventional liquid crystal display device; FIG. 2 is a partial equivalent circuit diagram of a liquid crystal display device according to a preferred embodiment of the present invention; FIG. 3A is a scanning line voltage of a liquid crystal display device according to a preferred embodiment of the present invention; FIG. 3B is a timing diagram of a storage electrode line voltage of a liquid crystal display device according to a preferred embodiment of the present invention; FIG. 3C is a voltage timing diagram of a pixel capacitor node of a liquid crystal display device according to a preferred embodiment of the present invention; FIG. 5A is a timing diagram of a scanning line voltage of a liquid crystal display device according to another preferred embodiment of the present invention; FIG. 5B is another timing diagram of a liquid crystal display device according to another preferred embodiment of the present invention; FIG. 5C is a voltage timing diagram of a pixel capacitor node of a liquid crystal display device according to another preferred embodiment of the present invention; FIG. 6 is a second preferred embodiment of the present invention. FIG. 7A is a timing diagram of a first scanning line voltage of a liquid crystal display device according to still another preferred embodiment of the present invention; FIG. 7B is a timing diagram of a second scan line voltage of a liquid crystal display device according to another preferred embodiment of the present invention; FIG. 7C is a timing diagram of an auxiliary electrode line voltage of the liquid crystal display device according to still another preferred embodiment of the present invention; FIG. A voltage timing diagram of a pixel capacitance node of a liquid crystal display device according to still another preferred embodiment of the present invention; and FIG. 8 is a flow chart of an image display method of a liquid crystal display device according to a preferred embodiment of the present invention.

2. . . Liquid crystal display device

twenty one. . . Sweep line

twenty two. . . Data line

twenty three. . . Common electrode line

twenty four. . . Storage electrode line

25. . . Pixel capacitance

251. . . Liquid crystal capacitor

252. . . Storage capacitor

26. . . First switch unit

261. . . First gate

262. . . First source

263. . . First bungee

27. . . Second switching unit

271. . . Second gate

272. . . Second source

273. . . Second bungee

Va. . . Pixel voltage

Claims (20)

A liquid crystal display device comprising: a scan line; a data line perpendicular to the scan line; an auxiliary electrode line parallel to the data line; a pixel capacitor disposed on the scan line and the data a first switch unit is electrically connected to the scan line, the data line and the pixel capacitor, wherein a first sub-image data is transmitted from the data line to the data line via the first switch unit The pixel capacitor is electrically connected to the auxiliary electrode line and the pixel of the scan line, and a second sub-image data is transmitted from the scan line via the second switch unit. To the pixel capacitance. The liquid crystal display device of claim 1, wherein the scan line sequentially transmits a driving voltage to control the first switching unit and the second sub-image data to the pixel capacitor. The liquid crystal display device of claim 1, wherein the first switching unit and the second switching unit are respectively a thin film transistor. The liquid crystal display device of claim 3, wherein the The first switching unit has a first gate, a first drain and a first source. The first gate is electrically connected to the scan line, and the first source and the data line are electrically connected. Connected, the first drain is electrically connected to the pixel capacitor. The liquid crystal display device of claim 3, wherein the second switching unit has a second gate, a second drain, and a second source, the second gate and the auxiliary electrode line The second source is electrically connected to the scan line, and the second drain is electrically connected to the pixel capacitor. The liquid crystal display device of claim 5, wherein the auxiliary electrode line transmits an auxiliary voltage to control the second switching unit. The liquid crystal display device of claim 1, wherein the pixel capacitor comprises: a liquid crystal capacitor electrically connected to the first switch unit, the second switch unit and a common electrode line; A storage capacitor is electrically connected to the first switch unit, the second switch unit, and a storage electrode line. The liquid crystal display device of claim 7, wherein the common electrode line and the storage electrode line respectively transmit different voltage signals number. The liquid crystal display device of claim 7, wherein the storage electrode line sequentially transmits a storage voltage to the storage capacitor. The liquid crystal display device of claim 1, wherein the second sub-image data is a black screen material. The liquid crystal display device of claim 1, further comprising a data line driving circuit electrically connected to the data line and providing the first sub-image data. The liquid crystal display device of claim 1, further comprising a scan line driving circuit electrically connected to the scan line and providing the second sub-image data. The image display method of the liquid crystal display device is performed in an image frame time, and the image frame time is divided into a first sub-picture frame time and a second sub-picture frame time, and the liquid crystal display device includes a scan. a line, a data line, an auxiliary electrode line, a pixel capacitor, a first switch unit and a second switch unit, the data line is perpendicular to the scan line, and the auxiliary electrode line is parallel to the data line, a pixel capacitor is disposed near an intersection of the scan line and the data line, and the first switch unit is respectively connected to the scan line, the data line, and the pixel The second switch unit is electrically connected to the auxiliary electrode line and the scan line, and the image display method includes: receiving the data from the data line at the first sub-picture frame time. The first switching unit transmits a first sub-image data to the pixel capacitor; and transmits a second sub-image data to the pixel capacitor from the scan line via the second switching unit at the second sub-frame time. The image display method according to claim 13, wherein the image frame time is an image frame time of a frequency of 60 Hz. The image display method of claim 13, wherein the second sub-image data is a black image material. The image display method of claim 13, wherein the voltage value of the second sub-image data is approximately equal to a voltage value of a common voltage. The image display method of claim 13, wherein the second switching unit is turned off when the first switching unit is turned on. The image display method of claim 13, wherein the first sub-image data is provided by a data line driving circuit, the capital The material line driving circuit is electrically connected to the data line. The image display method of claim 13, wherein the second sub-image data is provided by a scan line driving circuit, and the scan line driving circuit is electrically connected to the scan line. The image display method of claim 13, wherein the first sub-image frame time is not equal to the two sub-image frame time.