TW202027060A - Display device and driving method - Google Patents

Abstract

A driving method includes: displaying a first color field, a second color field and a third color field in sequence to constitute a first frame; displaying the second color field, the third color field and the first color field in sequence to constitute a second frame; displaying the third color field, the first color field and the second color field in sequence to constitute a third field; and repeating displaying the first frame, the second frame and the third frame to constitute an output image.

Description

Display device and driving method

The present disclosure relates to a display device and a driving method, and in particular to a Field Sequential Color Liquid Crystal Display (FSC-LCD) and a driving method.

With the development of technology, the demand for high-resolution panels has become more and more extensive. Because the field sequential liquid crystal display can not only improve the resolution bottleneck of the traditional liquid crystal display, thereby increasing the system color gamut and saturation, reducing the material cost, etc., it can also greatly improve the electro-optical conversion performance of the display panel. Therefore, it is quite competitive for the technical specifications of flat-panel displays with wide color gamut, high resolution and low power consumption.

However, as the display object or the line of sight of the human eye moves, the edge of the object in the image of the field sequential liquid crystal display will form a color breakup (CBU) phenomenon. Therefore, how to improve color separation is the current design consideration and challenge.

An implementation aspect of this disclosure is about a driver The method includes: sequentially displaying the first color field, the second color field, and the third color field to form the first frame of picture; then sequentially displaying the second color field, the third color field and the first color field to form the second Frame picture; then sequentially display the third color field, the first color field and the second color field to form the third frame picture; and repeatedly display the first frame picture, the second frame picture and the third frame picture in sequence to form the output image.

Another embodiment of the present disclosure relates to a display device including a backlight element and a first driver. The backlight element includes a plurality of backlight regions. The backlight area includes a first area, a second area, and a third area. The first driver is coupled to the backlight element. The first driver is used to perform the following operations: drive the first area to display the first color, the second area to display the second color, and the third area to display the third color to form a first color field; drive the first area to display the second color, The second area displays the third color, and the third area displays the first color to form a second color field; drives the first area to display the third color, the second area displays the first color, and the third area displays the second color to form A third color field; and driving the backlight element to sequentially display the first color field, the second color field and the third color field to form a first frame of picture.

100‧‧‧Display device

120‧‧‧Memory

140, 140a, 140b‧‧‧drive

160‧‧‧Backlight component

180‧‧‧LCD element

D1~Dm, D1~Dk, Dk+1~D2k……Dxk‧‧‧Data line

G1~Gn, Gn+1~G2n‧‧‧Scan line

Z0, Z11~ZMN, A11~AMN, B11~BMN‧‧‧Backlight area

Px‧‧‧Pixel

Rled, Gled, Bled‧‧‧Light-emitting element

R, G, B‧‧‧Color

c1~cN, c1~c8, r1~rN, d1~dN‧‧‧Backlight area

Fd1, Fd2, Fd3‧‧‧Color field

T1~TN, TN+1~T2N, T2N+1~T3N‧‧‧period

Fa1, Fa2, Fa3‧‧‧Frame

P0, P1~P9‧‧‧period

400‧‧‧Drive method

S420, S440, S460‧‧‧Operation

LCD, LED‧‧‧Timing diagram

cy1~cy8‧‧‧LCD area

t1~t37‧‧‧period

ON‧‧‧Drive signal

PB‧‧‧period

M1~Mx‧‧‧Multiplexer

L1~Lx‧‧‧Signal line

FIG. 1 is a schematic diagram of a display device according to some embodiments of the present disclosure.

FIG. 2A is a schematic diagram showing another display device according to some embodiments of the present disclosure.

FIG. 2B is a schematic diagram showing a backlight area according to some embodiments of the present disclosure.

FIG. 3 is a schematic diagram of a backlight device displaying a frame of images according to some embodiments of the present disclosure.

FIG. 4 is a flowchart of a driving method according to some embodiments of the present disclosure.

FIG. 5 is a schematic diagram of a backlight device displaying multiple frames of images according to some embodiments of the present disclosure.

FIG. 6 is a schematic diagram showing a display sequence of a liquid crystal element and a backlight element according to some embodiments of the present disclosure.

FIG. 7 is a schematic diagram of another display device according to other embodiments of the present disclosure.

FIG. 8A is a schematic diagram showing another display device according to other embodiments of the present disclosure.

FIG. 8B is a timing diagram of a liquid crystal element and a backlight element for displaying according to some embodiments of FIG. 8A.

FIG. 9A is a schematic diagram of a backlight device displaying a color field according to some embodiments of the present disclosure.

FIG. 9B is a schematic diagram of a backlight device displaying three color fields according to some embodiments of the present disclosure.

FIG. 10A is a schematic diagram of a backlight device displaying a color field according to some embodiments of the present disclosure.

FIG. 10B is a schematic diagram of a backlight device displaying three color fields according to some embodiments of the present disclosure.

The following is a detailed description of the embodiments in conjunction with the accompanying drawings, but the specific embodiments described are only used to explain the case, not to limit the case, and the description of the structure operation is not used to limit the order of its execution. The recombined structures and the devices with equal effects are all within the scope of this disclosure.

Unless otherwise specified, the terms used in the entire specification and the scope of the patent application usually have the usual meaning of each term used in this field, in the content disclosed here, and in the special content.

Regarding the "first", "second", "third"... etc. used in this article, they do not specifically refer to the order or sequence, nor are they used to limit the present disclosure. They are only used to distinguish the same technology. The term describes the element or operation only.

In addition, the "coupling" or "connection" used in this text can refer to two or more components directly making physical or electrical contact with each other, or indirectly making physical or electrical contact with each other, and can also refer to two or more components. Multiple elements interoperate or act.

Please refer to Figure 1. FIG. 1 is a schematic diagram of a display device 100 according to some embodiments of the present disclosure. As shown in FIG. 1, the display device 100 includes a memory 120, a driver 140, a backlight element 160, and a liquid crystal element 180. Structurally, the driver 140 is coupled to the memory 120, the backlight element 160 and the liquid crystal element 180. In operation, the backlight unit 160 is used to output backlight. The liquid crystal element 180 is used to control the liquid crystal molecules to output images. The driver 140 is used for controlling the backlight element 160 and the liquid crystal element 180 for display according to the data signal and the scanning signal. The memory 120 is used to store data.

Please refer to Figure 2A. Figure 2A is based on this disclosure A schematic diagram of another display device 100 is shown according to an embodiment. As shown in FIG. 2A, the backlight element 160 includes a plurality of backlight regions, such as the backlight regions Z11 to ZMN shown in the figure. In some embodiments, the number of backlight regions included in the backlight element 160 is M times N, where both M and N are any positive integer greater than one. Structurally, the backlight unit 160 is coupled to the driver 140. Specifically, the driver 140 is coupled to the backlight element 160 through a plurality of data lines D1 to Dm and a plurality of scan lines G1 to Gn.

In operation, the driver 140 is used to output a plurality of data signals to the backlight element 160 through the data lines D1 to Dm, and to output a plurality of scanning signals to the backlight element 160 through the scan lines G1 to Gn. The backlight element 160 is used for driving each backlight zone Z11 to ZMN to output backlight according to the data signal and the scanning signal.

In some embodiments, the driver 140 can be implemented by various processing circuits, micro controllers, central drivers, microprocessors, digital signal processors (DSPs), and application specific integrated circuits (application specific integrated circuits). Circuit, ASIC), complex programmable logic device (Complex Programmable Logic Device, CPLD), field-programmable gate array (Field-programmable gate array, FPGA) or logic circuit and other implementation methods are not used to limit the case.

Please refer to Figure 2B. FIG. 2B is a schematic diagram showing a backlight area Z0 according to some embodiments of the present disclosure. Any one of the backlight zones Z11 to ZMN shown in Figure 1 can be implemented by the backlight zone Z0 in Figure 2B. As shown in Fig. 2B, the backlight zone Z0 corresponds to a plurality of pixels Px. specific In other words, in the vertical projection direction, the area ratio of the pixel Px and the backlight zone Z0 will be matched according to the pixel density unit (Pixels Per Inch, PPI) and brightness requirements. For example, the area ratio of the pixel Px and the backlight zone Z0 is about 5%-50%.

In addition, as shown in FIG. 2B, the backlight area Z0 includes three light-emitting elements Rled, Gled, and Bled of red, green, and blue. In some embodiments, the light-emitting elements Rled, Gled, and Bled can be implemented by Micro Light Emitting Diode (mLED), but this case is not limited to this.

Please refer to Figure 3. FIG. 3 is a schematic diagram of a backlight element 160 displaying a frame of images according to some embodiments of the present disclosure. It should be noted that the number or size of the backlight area included in the backlight element 160 can be adjusted according to actual requirements, and is not intended to limit the present case. For ease of description, the backlight element 160 includes 8 columns and 8 rows, a total of 64 backlight regions, as an example.

As shown in FIG. 3, during the T1 period, the backlight area c1 in the first column of the backlight element 160 displays and emits light in the color R. During T2, the backlight area c2 in the second column of the backlight element 160 displays and emits light in the color G. During T3, the backlight area c3 in the third column of the backlight element 160 displays and emits light in color B. By analogy, during the TN period, the backlight area cN in the last column of the backlight element 160 emits light in a corresponding one of the color R, the color G, and the color B. For example, as shown in the embodiment in FIG. 3, since the backlight element 160 includes a total of 8 columns, N is 8. In other words, during the T8 period, the backlight area c8 in the eighth column of the backlight element 160 displays and emits light in the color G.

In this way, through the first area (such as the backlight area c1, c4, c7) Display the first color (such as red R), the second area (such as backlight area c2, c5, c8) displays the second color (such as green G), and the third area (such as backlight area c3, c6) displays the third color (For example, blue B), which constitutes the first color field (as shown by Fd1 in Figure 3).

Next, during the TN+1 period, the backlight area c1 in the first column of the backlight element 160 displays and emits light in the color G. During TN+2, the backlight area c2 in the second column of the backlight element 160 displays and emits light in color B. During TN+3, the backlight area c3 in the third column of the backlight element 160 displays and emits light in the color R. By analogy, during the T2N period, the backlight area cN in the last column of the backlight element 160 emits light in a corresponding one of the color R, the color G, and the color B. For example, as shown in the embodiment in FIG. 3, since the backlight element 160 includes a total of 8 columns, 2N is 16. In other words, during the period T16, the backlight area c8 in the eighth column of the backlight element 160 displays and emits light in the color B.

In this way, the first area (such as the backlight area c1, c4, c7) displays the second color (such as green G), and the second area (such as the backlight area c2, c5, c8) displays the third color (such as blue) B), the third area (such as the backlight area c3, c6) displays the first color (such as red R), forming a second color field (as shown by Fd2 in Figure 3).

Then, during the T2N+1 period, the backlight area c1 in the first column of the backlight element 160 displays and emits light in the color B. During the T2N+2 period, the backlight area c2 in the second column of the backlight element 160 displays and emits light in the color R. During the T2N+3 period, the backlight area c3 in the third column of the backlight element 160 displays and emits light in the color G. By analogy, during T3N, the backlight area cN in the last column of the backlight element 160 is displayed in the corresponding one of color R, color G, and color B. Light. For example, as shown in the embodiment in FIG. 3, since the backlight element 160 includes a total of 8 columns, 3N is 24. In other words, during T24, the backlight area c8 in the eighth column of the backlight element 160 displays and emits light in the color R.

In this way, the first area (such as the backlight area c1, c4, c7) displays the third color (such as blue B), and the second area (such as the backlight area c2, c5, c8) displays the first color (such as red) R), the third region (such as the backlight regions c3, c6) displays the second color (such as green G), forming a third color field (as shown by Fd3 in Figure 3).

Therefore, after the period of T1~T3N, the first area, the second area, and the third area sequentially display the corresponding first color, second color or third color to form the first color field Fd1 and the second color. The field Fd2 and the third color field Fd3, and the first color field Fd1, the second color field Fd2 and the third color field Fd3 constitute the first frame of picture.

In other words, each frame to be output is divided into three color fields, and the backlight area at the same position in each color field Fd1, Fd2, Fd3 contains three different colors R, G, B ( For example, the backlight area r2 displays colors G, B, and R in the color fields Fd1, Fd2, and Fd3, respectively. Since the color field update frequency of the color fields Fd1, Fd2, and Fd3 is higher than the frequency perceivable by the human eye, the human eye will produce visual persistence. Therefore, the first color field Fd1, the second color field Fd2 and the third color field Fd3 The first frame of picture Fa1 can be constructed. In addition, because the color sequence displayed in different backlight areas is different (for example, the backlight area r3 displays colors B, R, and G in the color fields Fd1, Fd2, Fd3, respectively, which is different from the order in which the backlight area r2 displays colors G, B, and R) Therefore, the periodicity of Color Breakup (CBU) can be destroyed to reduce the occurrence of color separation.

Please refer to Figure 4 and Figure 5. FIG. 4 is a flowchart of a driving method 400 according to some embodiments of the present disclosure. FIG. 5 is a schematic diagram of a backlight element 160 displaying multiple frames according to some embodiments of the present disclosure. The following driving method 400 is described in conjunction with the embodiment shown in Figures 1 to 10, but not limited to this. Anyone who is familiar with this technique can make various changes without departing from the spirit and scope of the case. And retouch. As shown in FIG. 4, the driving method 400 includes operations S420, S440, and S460.

First, in operation S420, the first color field Fd1, the second color field Fd2, and the third color field Fd3 are sequentially displayed to form a first frame picture Fa1.

For example, as shown in Figure 4, the first frame of picture Fa1 includes a color field Fd1, a color field Fd2, and a color field Fd3. Furthermore, in the period P1 (corresponding to the period T1 to TN in FIG. 3), the backlight element 160 displays the color field Fd1. Next, in the period P2 (corresponding to the period TN+1 to T2N in FIG. 3), the backlight element 160 displays the color field Fd2. Next, in the period P3 (corresponding to the period T2N+1 to T3N in FIG. 3), the backlight element 160 displays the color field Fd3. In other words, after the period P1 to P3 (equivalent to the period T1 to T3N in FIG. 3), the backlight element 160 sequentially displays the color field Fd1, the color field Fd2, and the color field Fd3 to form the first frame of picture Fa1.

Next, in operation S440, the second color field Fd2, the third color field Fd3, and the first color field Fd1 are sequentially displayed to form a second frame picture Fa2.

For example, as shown in FIG. 4, the second frame of picture Fa2 also includes a color field Fd1, a color field Fd2, and a color field Fd3. But further speaking, unlike the periods P1, P2, and P3, during the periods P4, P5, and P6, the backlight element 160 sequentially displays the color field Fd2, the color field Fd3, and the color field Fd1. In other words, during the period from P4 to P6, the color field Fd2, color field Fd3, and color field Fd1 sequentially displayed by the backlight element 160 constitute the first Two frames of picture Fa2.

Next, in operation S460, the third color field Fd3, the first color field Fd1, and the second color field Fd2 are sequentially displayed to form a third frame picture Fa3.

For example, as shown in FIG. 4, the third frame of picture Fa3 also includes a color field Fd1, a color field Fd2, and a color field Fd3. However, unlike the periods P1, P2, P3 or the periods P4, P5, and P6, during the periods P7, P8, and P9, the backlight unit 160 sequentially displays the color field Fd3, the color field Fd1, and the color field Fd2. In other words, during the period from P7 to P9, the color field Fd3, the color field Fd1, and the color field Fd2 sequentially displayed by the backlight element 160 constitute the third frame of picture Fa3.

By analogy, after operation S460, return to operation S420 again. In other words, a cycle includes a total of three frames (such as Fa1, Fa2, Fa3) or nine color field sequences (such as Fd1, Fd2, Fd3, Fd2, Fd3, Fd1, Fd3, Fd1, Fd2). In other words, the next frame of picture will be displayed in the same color field sequence (such as Fd1, Fd2, Fd3) as the first frame of picture Fa1.

Therefore, during the period from P1 to P9, the sequence of displaying the first color field Fd1, the second color field Fd2, and the third color field Fd3 by the backlight element 160 alternately changing each frame of the screen is similar to changing the display in different backlight regions. Color sequence can also destroy the periodicity of color separation. In this way, the phenomenon of color separation can be reduced without increasing the field-rate.

To further illustrate the operation between the backlight element 160 and the liquid crystal element 180, please refer to FIG. 6. As shown in FIG. 6, the upper side is a timing diagram LCD displaying by the liquid crystal element 180, and the lower portion is a timing diagram LED displaying by the backlight element 160. Among them, the horizontal axis represents time, and the vertical axis represents the backlight area of different areas. For the convenience of description, the embodiment in Figure 6 will cooperate with In FIGS. 3 and 5, the backlight element 160 includes 8 columns of backlight regions c1 to c8 as an example for description. It is worth noting that the backlight area can also be divided into different areas in other ways, which will be described in subsequent paragraphs. In addition, the liquid crystal regions cy1 to cy8 in the time sequence diagram LCD are based on the 8 columns of backlight regions c1 to c8 included in the backlight element 160, and the liquid crystal element 180 is divided into 8 columns of liquid crystal regions cy1 to cy8, which is also illustrative. No need to limit the case.

In some embodiments, as shown in the upper part of FIG. 6, the liquid crystal area cy1 in the first column of the liquid crystal element 180 starts to rotate during the period t1 according to the driving signal ON and ends during the period t9. The liquid crystal area cy2 in the second column starts to rotate during the period t2 according to the driving signal ON and ends during the period t10. By analogy, the liquid crystal areas cy3 to cy8 in the third column to the eighth column start to rotate during t3 to t8 according to the corresponding drive signal ON, and until the end of t11 to t16 respectively.

In addition, the period P0 shown in FIG. 6 is the length of time for the liquid crystal element 180 to receive the corresponding driving signal until the liquid crystal molecules are determined to rotate to position. In other words, during the period P0 (that is, the period from t1 to t6), the backlight element 160 has not yet started to emit light. After the period from t1 to t6, the first column liquid crystal area c1 of the backlight element 160 displays and emits light in the color R during the period from t7 to t8 according to the data signal and the scan signal. The second column liquid crystal area c2 displays and emits light in color G during t8~t9 according to the data signal and the scan signal. The third column liquid crystal area c3 displays and emits light in color B during t9~t10 according to the data signal and the scan signal. By analogy, the liquid crystal areas c4~c8 in the fourth column to the eighth column are in the corresponding color R, G, R, G, and C during t10~t11, t11~t12, t12~t13...t14~t15 according to the data signal and scanning signal. B performs display light emission. For details, please refer to section 3 above The descriptions of Figures to Figure 5 will not be repeated here.

In other words, after it is determined that the first column liquid crystal area cy1 is rotated to position during the period from t1 to t6, the first column liquid crystal area cy1 remains in position during the period from t7 to t8, so that the first column backlight area c1 can be output and displayed in color R. Similarly, after determining that the second column liquid crystal area cy2 rotates to position during t2 to t7, the second column liquid crystal area cy2 maintains its position during t8 to t9, so that the second column backlight area c2 can be output and displayed in color G. After it is determined during t3~t8 that the third column liquid crystal area cy3 is rotated to position, during t9 to t10, the third column liquid crystal area cy3 maintains its position, so that the third column backlight area c3 can be output and displayed in color B. By analogy, after determining that the eighth column liquid crystal area cy8 rotates to position during t8~t13, during t14~t15, the eighth column liquid crystal area cy8 maintains its position, so that the eighth column backlight area c8 can be output and displayed in color G.

In this way, during the period from t7 to t15, the backlight element 160 sequentially drives each column of backlight regions c1 to c8 to emit light in the first color field Fd1, and sequentially drives the liquid crystal corresponding to each column through the liquid crystal element 180 The areas cy1~cy8 enable the output and display of the image content of the first color field. Then, during t16, the backlight element 160 controls all the backlight regions c1 to c8 to not emit light. In other words, a completely black screen is included between the first color field Fd1 and the second color field Fd2 output by the backlight element 160.

Since the liquid crystal element 180 sequentially controls each column of the liquid crystal area to rotate and actuate operations are similar, it will not be repeated, and only the operation of the backlight element 160 will be described. As shown in FIG. 6, then, during the period from t17 to t25, similar to the period from t7 to t15, the backlight element 160 again sequentially drives each column of the backlight regions c1 to c8 to emit light to form the second color field Fd2. During t26, similar During t16, all the backlight areas c1~c8 do not emit light. Afterwards, during the period t27-25, the backlight element 160 again sequentially drives each column of the backlight regions c1 to c8 to emit light to form the third color field Fd3. During t36, all the backlight areas c1~c8 do not emit light. In other words, a completely black screen may be included between the output color field Fd1, the color field Fd2, and the color field Fd3 of the backlight element 160.

In this way, by driving each backlight area of the backlight element 160 to sequentially display the corresponding color R, color G, or color B, and with the corresponding action of the liquid crystal element 180, the first output can be displayed at P1, P2, and P3. The video content of the color field Fd1, the second color field Fd2 and the third color field Fd3. The first frame of picture Fa1 can be formed by the first color field Fd1, the second color field Fd2 and the third color field Fd3.

Regarding the operation of the backlight element in P4 after P3, as well as the detailed description of the second frame of picture Fa2 and the third frame of picture Fa3, those with ordinary knowledge in the art can learn from Fig. 3, Fig. 4 and the above description. , So I won’t repeat it here.

It is worth noting that the unit length, number, and ratio of the period t1 to t37 to P1 are based on the number of backlight regions included in the backlight element 160, the time required for the rotation of liquid crystal molecules, the length of the backlight light-emitting time, and the black screen time (such as (Shown in PB in Figure 6) depends on the length. Figure 6 is only an illustrative description and is not intended to limit the case. For example, the update frequency of the color fields Fd1, Fd2, Fd3 may be 180 Hz (that is, the unit length of the period t1 is approximately 5.55 microseconds), but this value is only an illustrative description and is not intended to limit the case.

Please refer to Figure 7. FIG. 7 is a schematic diagram of another display device 100 according to other embodiments of the present disclosure. Implementation in Figure 7 In the example, the components similar to those in FIG. 2A are represented by the same component symbols, and their operations have been described in the previous paragraphs, and will not be repeated here. Compared with FIG. 2A, in this embodiment, the display device 100 further includes multiplexers M1 to Mx. Structurally, the driver 140 is coupled to the backlight element 160 through the multiplexers M1 ˜Mx.

Specifically, the driver 140 is respectively coupled to the multiplexers M1~Mx through the signal lines L1~Lx. The multiplexers M1~Mx are each coupled to the backlight element 160 through a plurality of data lines D1~Dk, Dk+1~D2k...Dxk. For example, the driver 140 is connected to the multiplexer M1 through the signal line L1. The multiplexer M1 can be a pair of k multiplexers, that is, the signal can be output to the k data lines D1 to Dk through the multiplexer M1. In this way, the number of pins required by the driver 140 can be reduced by the multiplexers M1~Mx, so as to reduce the cost and/or improve the feasibility of the driver 140 integrating different functions.

Please refer to Figure 8A. FIG. 8A is a schematic diagram of another display device 100 according to other embodiments of the present disclosure. In the embodiment shown in FIG. 8A, elements similar to those in FIG. 2A are represented by the same element symbols, and the operations have been described in the previous paragraphs, and will not be repeated here. Compared with FIG. 2A, in this embodiment, the display device 100 not only includes the driver 140a, but also includes the driver 140b, and the backlight element 160 includes a first part A11~AMN and a second part B11~BMN. Structurally, the drivers 140a and 140b are respectively coupled to the first part A11~AMN and the second part B11~BMN of the backlight element 160. Specifically, the driver 140a is coupled to one side of the backlight element 160 through a set of data lines D1~Dm (the first part A11~AMN), and the driver 140b is coupled to the other side of the backlight element 160 through another set of data lines D1~Dm. One side (the second part B11~BMN).

In operation, the driver 140a is used to drive each backlight area of the first part of the backlight element 160 from the first side (e.g., the left side in Figure 8A) to the second side (e.g., the right side in Figure 8A) of the backlight element 160 A11~AMN emit light. The driver 140b is used to drive each backlight area B11 of the second part of the backlight element 160 from the second side (e.g., the right side in Figure 8A) to the first side (e.g., the left side in Figure 8A) of the backlight element 160 BMN emits light.

For example, the driver 140a drives the first part of the first column backlight area A11~ZM1 to emit light through the first set of data lines D1~Dm and the scan line G1, and at the same time the driver 140b transmits through the second set of data lines D1~Dm and the scan line G2n Drive the backlight area B11~BM1 in the last column of the second part to emit light. Then, the driver 140a drives the first part of the second column backlight area Z12~ZM2 to emit light through the data lines D1~Dm and the scan line G2, and at the same time the driver 140b drives the second through the second set of data lines D1~Dm and the scan line G2n-1. Part of the backlight area B12~BM2 in the penultimate column emits light. And so on, until the driver 140a drives the last column of the first part of the backlight zone Z1N~ZMN to emit light through the data lines D1~Dm and the scan line G1, and at the same time the driver 140b transmits through the second set of data lines D1~Dm and the scan line Gn+1 Drive the second part of the first column backlight area B1N~BMN to emit light.

Specifically, please refer to Figure 8B. FIG. 8B is a timing diagram of LCD and LED displaying by the liquid crystal element 180 and the backlight element 160 according to some embodiments of FIG. 8A. In the embodiment shown in FIG. 8B, the components similar to those in FIG. 6 are represented by the same component symbols, and their operations have been described in the previous paragraphs, and will not be repeated here. Compared with Figure 6, in this embodiment, because Two drivers 140a, 140b simultaneously drive the backlight area of the first part c1~c4 and the second part c5~c8 of the backlight element 160 to emit light. Therefore, the total light emission time required for each color field Fd1, Fd2, Fd3 is shorter . For example, the total light-emitting time of a color field shown in Figure 8B is t7~t11, which is about half of the total light-emitting time t7~t15 in the embodiment of Figure 6.

In other words, in some embodiments, the time PB for inserting a black picture between each color field Fd1, Fd2, Fd3 can be extended. As shown in Fig. 8B, the time PB for inserting a black frame is t12~t16, which is approximately five times the time PB for inserting a black frame as t16 in the embodiment in Fig. 6. In this way, the double-sided driver drives half of the picture separately, which can speed up the display speed of one frame of picture, thereby increasing the time of the black picture when there is no light, and improving the color separation phenomenon without increasing the color field update rate. . It is worth noting that the unit length, quantity, and the ratio of the unit length between t1 to t37 and P1 or PB in Fig. 8B are only illustrative. Those skilled in the art can adjust the design according to actual needs and are not intended to limit the case.

Regarding the backlight area 160 dividing different areas in other ways, please refer to FIG. 9A and FIG. 9B. FIG. 9A is a schematic diagram of a backlight element 160 displaying a color field according to some embodiments of the present disclosure. FIG. 9B is a schematic diagram of a backlight element 160 displaying three color fields according to some embodiments of the present disclosure. As shown in FIG. 9A, in some embodiments, the 64 backlight regions in the backlight element 160 are divided into the first column r1, the second column r2, the third column r3, and the last column rN. In other words, as shown in FIG. 9B, taking the backlight element 160 including 8 columns of backlight regions as an example, in the first color field Fd1, the first region displaying the color R includes the backlight regions r1, r4, and r7, and the first region displaying the color G The second area includes backlight areas r2, r5, and r8, and the third area displaying color B includes backlight areas r3 and r6.

Similarly, in the second color field Fd2, the first area (r1, r4, r7) displays the color G, the second area (r2, r5, r8) displays the third color B, and the third area (r3, r6) displays Color R. In the third color field Fd3, the first area (r1, r4, r7) displays color B, the second area (r2, r5, r8) displays color R, and the third area (r3, r6) displays color G.

In addition, please refer to Figure 10A and Figure 10B. FIG. 10A is a schematic diagram showing another backlight element 160 displaying a color field according to some embodiments of the present disclosure. FIG. 10B is a schematic diagram showing another backlight element 160 displaying three color fields according to some embodiments of the present disclosure. As shown in FIG. 10A, in some embodiments, the 64 backlight areas in the backlight element 160 are divided into a first oblique line d1, a second oblique line d2, a third oblique line d3... and a last oblique line dN. In other words, as shown in FIG. 10B, taking the backlight element 160 including 15 diagonal backlight regions as an example, in the first color field Fd1, the first region displaying the color R includes d1, d4, d7, d10, and d13, and the display The second area of color G includes d2, d5, d8, d11, and d14, and the third area of color B includes d3, d6, d9, d12, and d15.

Similarly, in the second color field Fd2, the first area (d1, d4, d7, d10, d13) displays color G, the second area (d2, d5, d8, d11, d14) displays color B, and the third area (d3, d6, d9, d12, d15) display color R. In the third color field Fd3, the first area (d1, d4, d7, d10, d13) displays color B, the second area (d2, d5, d8, d11, d14) displays color R, and the third area (d3, d6, d9, d12, d15) display color G.

It is worth noting that the above-mentioned method of dividing the backlight area is only used for illustrative description, and those skilled in the art can adjust the method of dividing according to actual needs. For example, every two or more adjacent columns in the backlight element 160 can be divided into the same One area.

In addition, in some other embodiments, the driving method 400 of this case can be performed together with local dimming. In other words, the brightness of different backlight regions that display the same color R, G, or B may not be completely the same. For example, when the backlight element 160 displays the first color field Fd1, the backlight regions Z11 to Z1N in the first region r1 that also display the color R may have different degrees of grayscale.

Although the disclosed methods are shown and described herein as a series of steps or events, it should be understood that the order of these steps or events shown should not be construed in a limiting sense. For example, some steps may occur in a different order and/or simultaneously with other steps or events other than the steps or events shown and/or described herein. In addition, when implementing one or more aspects or embodiments described herein, not all the steps shown here are necessary. In addition, one or more steps herein may also be performed in one or more separate steps and/or stages.

It should be noted that, in the case of no conflict, the features and circuits in the various drawings, embodiments, and embodiments of the present disclosure can be combined with each other. The circuit shown in the drawing is only an example, and is simplified to make the description concise and easy to understand, and is not intended to limit the case. In addition, the various devices, units, and components in the foregoing embodiments can be implemented by various types of digital or analog circuits, and can also be implemented by different integrated circuit chips, or integrated into a single chip. The foregoing is only an example, and the present disclosure is not limited to this.

To sum up, in this case, by applying the above-mentioned various embodiments, the backlight element 160 alternately replaces the display color field Fd1 and color field Fd2 for each frame. And the order of the color field Fd3, and alternately changing the order of displaying colors R, G, and B in each backlight area can destroy the periodicity of the appearance of color separation. Therefore, the phenomenon of color separation can be reduced without increasing the color field update frequency.

Although the content of this disclosure has been disclosed in the above embodiments, it is not intended to limit the content of this disclosure. Those with ordinary knowledge in the technical field can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this The scope of protection of the disclosed content shall be subject to the scope of the attached patent application.

400‧‧‧Drive method

S420, S440, S460‧‧‧Operation

Claims (10)

A display device includes: a backlight element including a plurality of backlight regions, the backlight regions including a first region, a second region, and a third region; and a first driver coupled to the backlight element, the second A driver is used to perform the following operations: drive the first area to display a first color, the second area to display a second color, and the third area to display a third color to form a first color field; One area displays the second color, the second area displays the third color, and the third area displays the first color to form a second color field; driving the first area to display the third color, the second The area displays the first color, the third area displays the second color to form a third color field; and the backlight element is driven to sequentially display the first color field, the second color field, and the third color field To form a first frame of picture. The display device according to claim 1, wherein the first driver is used to drive the backlight element to sequentially display the second color field, the third color field, and the first color field to form a second frame image, and The backlight element is driven to sequentially display the third color field, the first color field and the second color field to form a third frame. The display device according to claim 1, wherein the first area is adjacent to the second area and the third area, the second area is adjacent to the first area and the third area, and the third area is adjacent to Adjacent to the second area and the first area. The display device according to claim 3, wherein the first area, the second area, and the third area are backlight areas of different rows in the backlight areas. The display device according to claim 1, further comprising: a multiplexer, coupled between the first driver and the backlight element, for receiving a plurality of data signals from the first driver through a signal line, and The data signals are output to the backlight element through a plurality of data lines. The display device according to claim 1, further comprising a second driver, wherein the first driver is coupled to a first side of the backlight element, and the second driver is coupled to a second side of the backlight element, The first driver is used for driving the backlight element from the first side to the second side, and the second driver is used for driving the backlight element from the second side to the first side. A driving method includes: sequentially displaying a first color field, a second color field, and a third color field to form a first frame picture; sequentially displaying the second color field, the third color field, and the The first color field to form A second frame picture; sequentially displaying the third color field, the first color field, and the second color field to form a third frame picture; and repeatedly displaying the first frame picture and the second frame picture in sequence And the third frame to form an output image. The driving method according to claim 7, further comprising: displaying a first color, a second color, and a third color by a first area, a second area, and a third area to form the first color Color field; the second color, the third color, and the first color are respectively displayed by the first area, the second area, and the third area to form the second color field; and by the first area, The second area and the third area respectively display the third color, the first color and the second color to form the third color field. The driving method according to claim 8, wherein the first area, the second area, and the third area each include a plurality of backlight areas, displaying the same of the first color, the second color, or the third color The brightness of these backlight areas is different. The driving method according to claim 7, wherein the first color field, the second color field, and the third color field include one or more black frames.

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