Backlight unit control method, and device

Abstract

Provided in the present application are a backlight unit control method, and a device. The method comprises: acquiring a driving sequence of pixels on a display panel, and on the basis of the driving sequence of the pixels on the display panel, determining a driving sequence of backlight areas in a backlight unit; and acquiring image data, and on the basis of the image data, generating local dimming data of each backlight area, and on the basis of the local dimming data of each backlight area, driving a driving unit of each backlight area according to the driving sequence of the backlight areas. In this way, the synchronous display of a backlight unit and a display panel is realized.

Description

Backlight unit control method and device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 11, 2023, with application number 202311697032.7 and application name “Control method and device for backlight unit”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to, but is not limited to, a method and device for controlling a backlight unit. Background Art

[0003] With the development of technology, display devices have become important components of many electronic devices. Display devices are usually composed of a display panel and a backlight unit. The backlight unit is used to provide a backlight source for the display panel.

[0004] How to improve the performance of display devices has always been a research hotspot. Summary of the Invention

[0005] The present application provides a method for controlling a backlight unit, comprising:

[0006] Acquiring a driving sequence of each pixel on the display panel, and determining a driving sequence of each backlight area in the backlight unit according to the driving sequence of each pixel on the display panel;

[0007] Image data is acquired, local dimming data of each backlight area is generated according to the image data, and driving units of each backlight area are driven according to the local dimming data of the backlight area and in a driving order of each backlight area.

[0008] In some embodiments, determining the driving order of each backlight area in the backlight unit according to the driving order of each pixel on the display panel specifically includes:

[0009] The backlight area corresponding to each pixel is determined, and the driving order of each pixel on the display panel is used as the driving order of the backlight area corresponding to each pixel.

[0010] In some embodiments, the driving order of each pixel on the display panel is used as the driving order of the backlight area corresponding to each pixel, specifically including:

[0011] If the driving order of each pixel on the display panel is to drive at least one row of pixels each time, the driving order of the backlight area corresponding to each pixel is determined to be to drive at least one row of backlight area each time.

[0012] In some embodiments, pixels arranged along a first direction are connected to a gate driver chip through scan lines, and pixels arranged along a second direction are connected to a source driver chip through data lines. The gate driver chip is used to send a scan signal to at least one scan line so that at least one row of pixels receives the scan signal, and the source driver chip sends data to all data lines so that all columns of pixels receive data.

[0013] In some embodiments, generating local dimming data for each backlight area according to image data, and driving the driving units of each backlight area according to the local dimming data of the backlight area in a driving order of each backlight area specifically includes:

[0014] Obtain image data of the current pixel, generate local dimming data of the current backlight area according to the image data of the current pixel, and send the local dimming data to the current driving unit;

[0015] The current backlight area corresponds to the area where the current pixel is located, and the current driving unit is the driving unit corresponding to the current backlight area.

[0016] In some embodiments, sending local dimming data to the current driving unit specifically includes:

[0017] A dimming data packet of the current driving unit is generated according to the local dimming data of the current backlight area and the address of the driving unit corresponding to the current backlight area, and the local dimming data packet is sent to the current driving unit.

[0018] In some embodiments, generating a dimming data packet of the current driving unit according to the local dimming data of the current backlight area and the address of the driving unit corresponding to the current backlight area specifically includes:

[0019] A dimming data packet is generated according to the local dimming data, the preset delay time and the address of the driving unit, and the dimming data packet is sent to the current driving unit, so that the current driving unit delays lighting the backlight area based on the preset delay time after receiving the dimming data packet.

[0020] In some embodiments, sending a local dimming data packet to the current driving unit specifically includes:

[0021] After waiting for the preset delay time, the dimming data packet is sent to the driver unit.

[0022] Some embodiments of the present application provide a control device for a backlight unit, including:

[0023] An acquisition module, configured to acquire a driving sequence of each pixel on the display panel, and determine a driving sequence of each backlight area in the backlight unit according to the driving sequence of each pixel on the display panel;

[0024] The processing module is used to obtain image data, generate local dimming data of each backlight area according to the image data, and drive the driving unit of each backlight area according to the local dimming data of the backlight area and the driving sequence of each backlight area.

[0025] Some embodiments of the present application provide a controller, comprising: a processor, and a memory communicatively connected to the processor;

[0026] Memory stores computer-executable instructions;

[0027] The processor executes the computer-executable instructions stored in the memory to implement the methods involved in the above embodiments.

[0028] Some embodiments of the present application provide a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the methods involved in the above embodiments.

[0029] The control method and device of the backlight unit provided in the present application obtain the driving order of each pixel on the display panel, determine the driving order of each backlight area in the backlight unit according to the driving order of each pixel on the display panel, drive the driving unit of each backlight area according to the driving order of each backlight area according to the local dimming data of the backlight area, so that each backlight area emits light according to the driving order of each backlight area, thereby realizing synchronous display of the backlight unit and the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0031] FIG1 is a schematic diagram of a display device with a direct backlight that does not employ local dimming technology;

[0032] FIG2 is a schematic diagram of a display device with a direct backlight using local dimming technology;

[0033] FIG3 is a schematic diagram of a display device that adopts a direct-lit backlight, incorporates local dimming technology, and uses an AM driving mode;

[0034] FIG4 is a schematic flow chart of a method for controlling a backlight unit according to some embodiments of the present application;

[0035] FIG5 is a schematic structural diagram of a display device provided in some embodiments of the present application;

[0036] FIG6 is a schematic structural diagram of a backlight unit provided in some embodiments of the present application;

[0037] FIG7 is a schematic diagram of a lighting sequence of the backlight unit shown in FIG6 ;

[0038] FIG8 is a schematic diagram of another lighting sequence of the backlight unit shown in FIG6 ;

[0039] FIG9 is a schematic structural diagram of a backlight unit provided in some other embodiments of the present application;

[0040] FIG10 is a schematic diagram of a lighting sequence in the backlight unit shown in FIG9 ;

[0041] FIG11 is a schematic structural diagram of a backlight unit provided in some other embodiments of the present application;

[0042] FIG12 is a schematic diagram of a lighting sequence in the backlight unit shown in FIG11 ;

[0043] FIG13 is a schematic diagram of a controller provided in some embodiments of the present application.

[0044] Description of the drawings: 100, backlight unit; 200, display panel; 10, driving unit; 30, backlight area; 40, pixel; 300, dimming controller; 400, timing controller; 210, gate driver chip; 220, source driver chip; X, first direction; Y, second direction.

[0045] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0046] Exemplary embodiments are described in detail herein, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatuses and methods consistent with certain aspects of the present application.

[0047] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with the relevant laws, regulations and standards of relevant countries and regions, and corresponding operation entrances are provided for users to choose to authorize or refuse.

[0048] Display device backlighting methods include direct backlighting and edge backlighting. Edge backlighting means that the backlight source is located on the side of the display panel, and the light is transmitted to the center of the screen through the light guide plate. Direct backlighting means that the backlight source is located on the back of the display panel.

[0049] Figure 1 is a schematic diagram of a display device with a direct-lit backlight that does not utilize local dimming technology. As shown in Figure 1 , the display device includes a single backlight unit 100. When the display device is operating, the entire backlight unit 100 turns on and off simultaneously, resulting in a high driving current. Figure 2 is a schematic diagram of a display device with a direct-lit backlight that utilizes local dimming technology. To reduce power loss in the backlight panel, mini-light-emitting diode (Mini-LED) technology is introduced. Mini-LEDs can be used as backlight sources to achieve regional dimming, also known as local dimming. Each backlight region 30 can be individually controlled to turn on and off. Each backlight region 30 can be composed of at least one Mini-LED. Furthermore, each backlight region 30 corresponds to an area containing n×m pixels 40 within the display panel 200. For example, in Figure 2 , one backlight region 30 corresponds to an area containing 2×2 liquid crystal pixels 40. For ease of description, Mini-LEDs will be referred to as LEDs below.

[0050] There are two main driving modes for light emitting diodes as backlight sources: passive matrix (PM) driving mode and active matrix (AM) driving mode.

[0051] In PM drive mode, the anodes of each column of LEDs in the LED array are connected to the column scan line, while the cathodes of each row of LEDs are connected to the row scan line. When a specific column scan line (b) and row scan line (a) are selected, the LED at their intersection (a, b) is illuminated. This high-speed, point-by-point scanning of the entire screen creates a display.

[0052] In AM drive mode, multiple driver units (Dimmers) are provided. One driver unit can control LEDs in multiple backlight areas 30 or a single backlight area 30. A single backlight area 30 can have multiple LEDs or just one LED, with no restrictions imposed. A driver unit is provided for each LED, and each driver unit controls the LED's light emission.

[0053] Figure 3 is a schematic diagram of a display device with a direct-lit backlight and an AM drive mode. As shown in Figure 3 , the display device includes a timing controller (TCON), a dimming controller 300, a backlight unit 100 (BLU), and a display panel 200. The timing controller 400 is used to generate display data and local dimming data based on video data. The display data is used to drive the display panel 200. The timing controller 400 is also used to generate local dimming data for the entire backlight unit 100 based on the video data. The dimming controller 300 is used to generate local dimming data for each backlight area 30 based on the local dimming data for the entire backlight unit 100. The local dimming data for each backlight area 30 is then sent to the driver units of each LED. The driver units provide backlight drive signals to the LEDs, which control the brightness of the LEDs, thereby providing backlight with varying brightness levels.

[0054] It should be noted that the functions of the timing controller 400 and the dimming controller 300 can be adaptively adjusted. For example, the timing controller 400 can send image data to the dimming controller 300, and the dimming controller 300's built-in dimming algorithm can calculate local dimming data. The dimming controller 300 can also be omitted, and the timing controller 400 can send local dimming data to the driving unit. In other words, the architecture of the display device is not limited to the architecture shown in Figure 3. Figure 3 is only an example of the architecture of a display device.

[0055] Since the local dimming technology is adopted in the display device, it is necessary to consider the synchronous display between the backlight unit 100 and the display panel 200 to improve the performance of the display device.

[0056] FIG4 is a flow chart of a method for controlling a backlight unit provided in some embodiments of the present application. As shown in FIG4 , some embodiments of the present application provide a method for controlling a backlight unit 100. The method for controlling the backlight unit 100 is applied to a controller, which may be the timing controller in FIG3 , the dimming controller in FIG3 , or other controllers, without limitation. The method for controlling the backlight unit 100 specifically includes the following steps:

[0057] S101 : Acquire a driving sequence of each pixel on a display panel, and determine a driving sequence of each backlight area in a backlight unit according to the driving sequence of each pixel on the display panel.

[0058] As shown in FIG5 , the display panel 200 includes a plurality of pixels 40, which are arranged at intervals along a first direction X. The plurality of pixels 40 are also arranged at intervals along a second direction Y. The driving order of the pixels on the display panel can be determined based on the video data or image data to be displayed, or can be determined by configuration parameters of the display panel, and this is not limited here.

[0059] The driving order of each pixel on the display panel is used as the driving order of each backlight area in the backlight unit. More specifically, the backlight area corresponding to each pixel is determined, and the driving order of each pixel on the display panel is used as the driving order of the backlight area corresponding to each pixel.

[0060] As shown in Figure 5, the display device also includes a source driver chip 220 and a gate driver chip 210. The pixels of the display panel include thin film transistors (TFTs). The source driver chip 220 is used to drive the source of the thin film transistors in the display panel, and the gate driver chip 210 is used to drive the gate of the TFT transistors in the display panel. The timing controller 400 sends data to the source driver chip 220, and the timing controller sends a scanning signal to the gate driver chip 210 to drive the thin film transistors in the display panel to emit light according to the received data.

[0061] In some embodiments, pixels arranged along a first direction X are connected to a gate driver chip via scan lines, and pixels arranged along a second direction Y are connected to a source driver chip via data lines. The gate driver chip is configured to send a scan signal to at least one scan line so that at least one row of pixels receives the scan signal, and the source driver chip sends data to all data lines so that all columns of pixels receive the data. In this way, at least one row of pixels is driven for display by the timing controller, the gate driver chip, and the source driver chip.

[0062] In some embodiments, if the driving order of each pixel on the display panel is to drive at least one row of pixels at a time, the driving order of the backlight area corresponding to each pixel is determined to be to drive at least one row of backlight area at a time. In other words, the driving order of each pixel on the display panel is to drive the pixels in units of pixel rows.

[0063] In some embodiments, the number of pixel rows driven each time may be one or more, and this is not limited here. The number of pixel rows driven each time may be the same or different, and this is not limited here. The display panel may be driven in a sequence from one end of the display panel along the second direction Y to the other end along the second direction Y, or from the middle of the display panel to both ends of the display panel. This is not limited here.

[0064] In some embodiments, the number of rows of pixels driven each time in a frame image is the same, and each time a row of pixels is driven, the driving order of each pixel on the display panel is from one end of the display panel along the second direction Y to the other end of the display panel along the second direction Y.

[0065] For example, the driving order of the pixels on the display panel is: first row of pixels, second row of pixels, ..., second to last row of pixels, and last to last row of pixels. The driving order of the backlight areas is: backlight area corresponding to the first row of pixels, backlight area corresponding to the second row of pixels, ..., backlight area corresponding to the second to last row of pixels, and backlight area corresponding to the last to last row of pixels.

[0066] In some embodiments, the number of rows of pixels driven each time in a frame image is the same, and each time a row of pixels is driven, the driving order of the pixels on the display panel is from the middle row of pixels of the display panel to one end along the second direction Y, and then from the middle row of pixels of the display panel to the other end along the second direction Y.

[0067] For example, the driving order of pixels on the display panel is the Nth row of pixels, the (N-1)th row of pixels, ..., the 1st row of pixels, the (N+1)th row of pixels, the (N+2)th row of pixels, ... the 2Nth row of pixels.

[0068] In some embodiments, the number of rows of pixels driven each time in a frame of image is the same, and multiple rows of pixels are driven each time. The order of driving the pixels on the display panel is from one end of the display panel along the second direction Y to the other end of the display panel along the second direction Y.

[0069] For example, the order in which pixels on a display panel are driven is first the first and second rows of pixels, then the third and fourth rows of pixels, etc. The order in which backlight areas are driven is first the backlight areas corresponding to the first and second rows of pixels, then the backlight areas corresponding to the third and fourth rows of pixels, etc.

[0070] In some embodiments, the number of rows of pixels driven each time in a frame image is the same, and multiple rows of pixels are driven each time, and the driving order of each pixel on the display panel is from the middle row of pixels of the display panel to one end along the second direction Y, and then from the middle row of pixels of the display panel to the other end along the second direction Y.

[0071] For example, the driving order of the pixels on the display panel is to first drive the Nth row of pixels and the (N-1)th row of pixels, then drive the (N-2)th row of pixels and the (N-3)th row of pixels, ..., the 2nd row of pixels and the 1st row of pixels, the (N+1)th row of pixels and the (N+2)th row of pixels, the (N+3)th row of pixels and the (N+4)th row of pixels, ..., the (2N-1)th row of pixels and the 2Nth row of pixels.

[0072] In some embodiments, the number of pixel rows driven each time in a frame of image is different. The driving order of each pixel on the display panel is from one end of the display panel along the second direction Y to the other end of the display panel along the second direction Y.

[0073] For example, the order in which the pixels on the display panel are driven is: first, the pixels in the first row, followed by the pixels in the second and third rows, then the pixels in the fourth, fifth, and sixth rows, etc. The order in which the backlight areas are driven is: the backlight area corresponding to the pixels in the first row, then the backlight area corresponding to the pixels in the second and third rows, then the backlight area corresponding to the pixels in the fourth, fifth, and sixth rows, etc.

[0074] In some embodiments, the number of rows of pixels driven each time in a frame image is different, and the driving order of each pixel on the display panel is from the middle row of pixels of the display panel to one end along the second direction Y, and then from the middle row of pixels of the display panel to the other end along the second direction Y.

[0075] S102 , acquiring image data, generating local dimming data for each backlight area according to the image data, and driving the driving units of each backlight area according to the local dimming data of the backlight area and in a driving order of each backlight area.

[0076] The image data is processed using an existing dimming algorithm to generate local dimming data for each backlight area. The local dimming data for each backlight area is sent to the driver units of each backlight area, which are driven according to the driving sequence of each backlight area, so that each backlight area emits light according to the driving sequence of each backlight area, thereby achieving synchronous display between the backlight unit and the display panel.

[0077] In the above technical solution, the driving sequence of each pixel on the display panel is obtained, the driving sequence of each backlight area in the backlight unit is determined according to the driving sequence of each pixel on the display panel, and the driving units of each backlight area are driven according to the driving sequence of each backlight area according to the local dimming data of the backlight area, so that each backlight area emits light according to the driving sequence of each backlight area, thereby realizing synchronous display of the backlight unit and the display panel.

[0078] Some embodiments of the present application provide a method for controlling a backlight unit. The method for controlling the backlight unit uses a controller and specifically includes the following steps:

[0079] S201 : Acquire a driving sequence of each pixel on a display panel, and determine a driving sequence of each backlight area in a backlight unit according to the driving sequence of each pixel on the display panel.

[0080] This step has been described in detail in S101 and will not be repeated here.

[0081] S202 : Acquire image data, generate local dimming data for each backlight area according to the image data, and drive the driving units of each backlight area according to the local dimming data of the backlight area and in a driving order of each backlight area.

[0082] The current pixel is obtained based on the driving order of each pixel on the display panel. The current pixel is the currently displayed pixel. Image data of the current pixel is obtained. Local dimming data for the current backlight area is generated based on the image data of the current pixel. The area where the current pixel is located corresponds to the current backlight area. The local dimming data is sent to the current driving unit. The current driving unit is the driving unit corresponding to the current backlight area. The local dimming data controls the current driving unit to drive the backlight area to emit light.

[0083] In some embodiments, local dimming data of the current backlight area is generated according to the image data of the current pixel, and a dimming data packet of the current driving unit is generated according to the local dimming data of the current backlight area and the address of the current driving unit.

[0084] In some embodiments, because the amount of local dimming data is smaller than the amount of image data, after generating the local dimming data for the backlight area corresponding to the current pixel, a dimming data packet is generated based on the local dimming data for the current backlight area and the address of the driver unit corresponding to the current backlight area. After a preset delay, the dimming data packet is sent to the current driver unit. This delays the backlight area's light emission and enables synchronized display between the backlight unit and the display panel.

[0085] In some embodiments, after generating local dimming data of the backlight area corresponding to the current pixel, a dimming data packet is generated based on the local dimming data, the preset delay time and the address of the driving unit, and the dimming data packet is sent to the current driving unit, so that after receiving the dimming data packet, the current driving unit delays lighting up the backlight area based on the preset delay time, thereby achieving synchronous display between the backlight unit and the display panel.

[0086] In the above technical solution, after generating local dimming data based on image data, the driving unit can be controlled to delay lighting the backlight area by delaying the sending of the dimming data packet or setting a preset delay time in the dimming data packet, thereby achieving synchronous display between the backlight unit and the display panel.

[0087] Some embodiments of the present application provide a method for controlling a backlight unit. The method for controlling the backlight unit uses a controller and specifically includes the following steps:

[0088] S301 : Acquire a driving sequence of each pixel on a display panel, and determine a driving sequence of each backlight area in a backlight unit according to the driving sequence of each pixel on the display panel.

[0089] The driving order of each pixel on the display panel is to drive each row of pixels as a unit, and the driving order of each backlight area in the backlight unit is to drive each row of backlight areas as a unit.

[0090] S302 : Acquire image data, generate local dimming data for each backlight area according to the image data, and drive the driving units of each backlight area according to the local dimming data of the backlight area and in a driving order of each backlight area.

[0091] The method obtains at least one row of pixels and generates local dimming data for the current backlight area based on the image data of the at least one row of pixels. The area where the at least one row of pixels is located corresponds to the current backlight area. A dimming data packet for the current drive unit is generated based on the local dimming data for the current backlight area and the address of the current drive unit. The current drive unit is the drive unit corresponding to the current backlight area.

[0092] In some embodiments, multiple transmission lines are arranged on the backlight unit, and multiple driving units share the same transmission line. The transmission line corresponding to the current driving unit is obtained, and the controller combines the dimming data packets of the current driving unit on the same transmission line and outputs them through the transmission line, so that the combined data packets are transmitted on the transmission line.

[0093] The following uses any driver unit on the transmission line as an example. For ease of description, any driver unit is referred to as the target driver unit. The target driver unit receives the combined data packet sent by the previous driver unit and traverses the dimming data packets in the combined data packet. For ease of description, any dimming data packet in the combined data packet is referred to as the target data packet. When the address in the target dimming data packet is the same as the address of the target driver unit, it is determined that the target dimming data packet matches the target driver unit, and the target driver unit drives the backlight unit based on the target dimming data.

[0094] The following uses the structures of three backlight units as examples to illustrate the transmission process of the dimming data packet. The structures of the backlight units may also be other cases, which are not limited here.

[0095] 6 is a schematic structural diagram of a backlight unit 100 , in which a plurality of driving units 10 are arranged at intervals along a first direction X, and a plurality of driving units 10 are arranged at intervals along a second direction Y, and the driving units 10 arranged at intervals in the second direction Y are connected in sequence.

[0096] The drive units 10 arranged along the first direction X are referred to as a row of drive units 10, and the drive units 10 arranged along the second direction Y are referred to as a column of drive units 10. The drive units 10 in the first column are connected to the controller via a transmission line, the drive units 10 in the second column are connected to the controller via a transmission line, and so on, until the drive units 10 in the last column are connected to the controller via a transmission line.

[0097] The transmission line to which the current driver unit 10 is connected is determined, and a dimming data packet is sent to the current driver unit 10 via the transmission line. The dimming data packet is sent to the corresponding driver unit column, and the dimming data packet is transmitted between the driver units 10 in the column. When the address of the driver unit receiving the dimming data packet is the same as the address of the driver unit in the dimming data packet, the driver unit 10 controls the backlight area 30 to emit light based on the local dimming data in the dimming data packet.

[0098] For example, as shown in Figure 6, one backlight area 30 corresponds to a 2×2 pixel, and the backlight unit is provided with 8×6 backlight areas 30 and 4×6 driving units 10. One row driving unit 10 drives two rows of backlight areas 30, and one column driving unit 10 drives one column of backlight areas 30.

[0099] As an example, in a frame of image, the number of pixel rows driven each time is the same, and one row of pixels is displayed at a time. That is, in a frame of image, the first row of pixels is displayed first, followed by the second row of pixels, and so on. The current pixel is the first row of pixels, and the current backlight region 30 is the first row of backlight region 30. The current driving unit 10 is the first row of driving units. As shown in FIG7 , FIG7 is filled with black to indicate the current backlight region, and filled with diagonal lines to indicate the current driving unit.

[0100] A local dimming data packet of the backlight area of ​​the first row is generated based on the image data of the pixels of the first row. The local dimming data packet of the backlight area of ​​the first row specifically includes the local dimming data of the backlight area of ​​the first row and the first column, the local dimming data of the backlight area of ​​the first row and the second column, ... the local dimming data of the backlight area of ​​the first row and the sixth column.

[0101] The backlight area in row 1, column 1 is controlled by the drive unit in row 1, column 1, the backlight area in row 1, column 2 is controlled by the drive unit in row 1, column 2, ..., the backlight area in row 1, column 6 is controlled by the drive unit in row 1, column 6. That is, the current drive units include the drive unit in row 1, column 1, the drive unit in row 1, column 2, ..., the drive unit in row 1, column 6.

[0102] The driving unit in the 1st row and 1st column receives local dimming data through the 1st transmission line, the driving unit in the 1st row and 2nd column receives local dimming data through the 2nd transmission line, ... the driving unit in the 1st row and 6th column receives local dimming data through the 6th transmission line.

[0103] If the current driver units do not use the same transmission line, there is no need to combine the dimming data packets. The local dimming data packet for the backlight zone in row 1 and column 1 is transmitted via the first transmission line. The local dimming data packet for the backlight zone in row 1 and column 2 is transmitted via the second transmission line. ... The local dimming data packet for the backlight zone in row 1 and column 6 is transmitted via the first transmission line.

[0104] After the last driver unit 10 in the first column of driver units 10 receives the dimming data packet transmitted on the first transmission line, the last driver unit 10 extracts the driver unit address from the dimming data packet. If the driver unit address is not the address of the last driver unit 10, the dimming data packet is passed to the second-to-last driver unit 10. This process continues in this manner until the dimming data packet is passed to the first row of driver units 10. After the first driver unit 10 determines that the driver unit address is the address of the first driver unit, it controls the first column, first row backlight area 30 according to the local dimming data in the dimming data packet. The dimming data packet transmission and processing process for the second to sixth column driver units 10 is similar and will not be further described here.

[0105] As another example, as shown in FIG8 , in one frame of image, the number of pixel rows driven each time is the same, and 6 rows of pixels are displayed each time. That is, in one frame of image, the pixels in rows 1 to 6 are displayed first, followed by the pixels in rows 7 to 12, and so on.

[0106] The current pixels are pixels in the 1st row to pixels in the 6th row, and the current backlight regions 30 are backlight regions 30 in the 1st row to backlight regions 30 in the 3rd row. The current driving units include driving units 10 in the 1st row and driving units 10 in the 2nd row.

[0107] The 1st row backlight area 30 and the 2nd row backlight area 30 are driven by the 1st row driving unit 10. The local dimming data corresponding to the 1st row 1st column driving unit includes the local dimming data packet of the backlight area in the 1st row 1st column and the local dimming data of the backlight area in the 2nd row 1st column. The local dimming data corresponding to the 1st row 2nd column driving unit includes the local dimming data packet of the backlight area in the 1st row 2nd column and the local dimming data of the backlight area in the 2nd row 2nd column. ..., the local dimming data corresponding to the 1st row 6th column driving unit includes the local dimming data packet of the backlight area in the 1st row 6th column and the local dimming data of the backlight area in the 2nd row 6th column.

[0108] The backlight area 30 in the third row is driven by the driving unit 10 in the second row. The local dimming data corresponding to the driving unit in the second row and the first column includes the local dimming data packet of the backlight area in the third row and the first column. The local dimming data corresponding to the driving unit in the third row and the second column includes the local dimming data of the backlight area in the third row and the second column. ... The local dimming data corresponding to the driving unit in the third row and the sixth column includes the local dimming data of the backlight area in the third row and the sixth column.

[0109] The current driving units include the 1st row and 1st column driving units, the 1st row and 2nd column driving units, ..., the 1st row and 6th column driving units, and the current driving units also include the 2nd row and 1st column driving units, the 2nd row and 1st column driving units, ..., the 1st row and 6th column driving units.

[0110] The 1st row 1st column driving unit and the 2nd row 1st column driving unit share the 1st data line, the 1st row 2nd column driving unit and the 2nd row 2nd column driving unit share the 2nd data line, ..., the 1st row 6th column driving unit and the 2nd row 6th column driving unit share the 6th data line.

[0111] The local dimming data corresponding to the 1st row and 1st column drive unit is combined with the local dimming data corresponding to the 2nd row and 1st column drive unit and sent to the 1st transmission line. The local dimming data corresponding to the 1st row and 2nd column drive unit is combined with the local dimming data corresponding to the 2nd row and 2nd column drive unit and sent to the 2nd transmission line. ..., the local dimming data corresponding to the 1st row and 6th column drive unit is combined with the local dimming data corresponding to the 2nd row and 6th column drive unit and sent to the 6th transmission line.

[0112] The processing of the local dimming data packet by each driving unit has been described in the above embodiment and will not be repeated here.

[0113] FIG9 is a schematic structural diagram of a backlight unit 100 , in which a plurality of drive units 10 are arranged at intervals along a first direction X, and a plurality of drive units 10 are arranged at intervals along a second direction Y. The drive units 10 arranged along the first direction X are referred to as a row of drive units 10 , and the drive units 10 arranged along the second direction Y are referred to as a column of drive units 10 .

[0114] 6 , the drive units 10 arranged alternately in the first direction X are connected sequentially. The first row of drive units 10 are connected to the controller via the first transmission line, the second row of drive units 10 are connected to the controller via the second transmission line, and so on. The second row of drive units 10 are connected to the controller via the fourth transmission line.

[0115] Different from Figure 8, as shown in Figure 10, only for the current driving unit, the 1st row and 1st column driving unit, the 1st row and 2nd column driving unit, ..., the 1st row and 6th column driving unit share the 1st data line, and the 2nd row and 1st column driving unit, the 2nd row and 2nd column driving unit, ..., the 2nd row and 6th column driving unit share the 2nd data line.

[0116] The dimming data packet corresponding to the 1st row and 1st column driving unit, the dimming data packet corresponding to the 1st row and 2nd column driving unit, ..., the dimming data packet corresponding to the 1st row and 6th column driving unit are combined and transmitted through the first data line.

[0117] The dimming data packet corresponding to the 2nd row 1st column driving unit, the dimming data packet corresponding to the 2nd row 2nd column driving unit, ..., the dimming data packet corresponding to the 2nd row 6th column driving unit are combined and transmitted via the second data line.

[0118] FIG11 is a schematic structural diagram of a backlight unit 100. A plurality of drive units 10 are arranged at intervals along a first direction X, and a plurality of drive units 10 are arranged at intervals along a second direction Y. The drive units 10 arranged along the first direction X are referred to as a row of drive units 10, and the drive units 10 arranged along the second direction Y are referred to as a column of drive units 10. Unlike FIG6 , the columns of drive units are divided into multiple groups based on their positional relationship. Each group of drive units includes two adjacent columns of drive units, and the two columns of drive units in each group share a common data line.

[0119] FIG11 shows that the six columns of driving units are divided into three groups. The first column of driving units and the second column of driving units share the first transmission line, the third column of driving units and the fourth column of driving units share the second transmission line, and the fifth column of driving units and the sixth column of driving units share the third transmission line.

[0120] Different from FIG8 , as shown in FIG12 , only for the current driving unit, the driving unit in the 1st row and 1st column, the driving unit in the 1st row and 2nd column, the driving unit in the 2nd row and 1st column, and the driving unit in the 2nd row and 2nd column share the 1st data line, the driving unit in the 1st row and 3rd column, the driving unit in the 1st row and 4th column, the driving unit in the 2nd row and 3rd column, and the driving unit in the 2nd row and 4th column share the 2nd data line, and the driving unit in the 1st row and 5th column, the driving unit in the 1st row and 6th column, the driving unit in the 2nd row and 5th column, and the driving unit in the 2nd row and 6th column share the 3rd data line.

[0121] The dimming data packet corresponding to the 1st row and 1st column driving unit, the dimming data packet corresponding to the 1st row and 2nd column driving unit, the dimming data packet corresponding to the 2nd row and 1st column driving unit, and the dimming data packet corresponding to the 2nd row and 2nd column driving unit are combined and transmitted through the first data line.

[0122] The dimming data packets corresponding to the 1st row 3rd column driving unit, the dimming data packets corresponding to the 1st row 4th column driving unit, the dimming data packets corresponding to the 2nd row 3rd column driving unit and the dimming data packets corresponding to the 2nd row 4th column driving unit are combined and transmitted through the second data line.

[0123] The dimming data packets corresponding to the 1st row 5th column driving unit, the dimming data packets corresponding to the 1st row 6th column driving unit, the dimming data packets corresponding to the 2nd row 5th column driving unit and the dimming data packets corresponding to the 2nd row 6th column driving unit are combined and transmitted through the second data line.

[0124] In the above technical solution, when the display panel 200 displays pixels in units of each row, local dimming data for the current backlight area 30 is generated based on the image data of the current pixel, and a dimming data packet for the current drive unit 10 is generated based on the local dimming data of the current backlight area 30 and the address of the current drive unit. In this way, backlight source light is provided in units of each backlight area 30. That is, when the pixels in the display panel 200 are displayed simultaneously in the first direction X and sequentially in the second direction Y, the backlight areas 30 are illuminated simultaneously in the first direction X and sequentially in the second direction Y. This can improve the performance of the display device by synchronizing the display time of the display panel 200 and the lighting time of the backlight unit 100.

[0125] Some embodiments of the present application provide a control device for a backlight unit, including:

[0126] An acquisition module, configured to acquire a driving sequence of each pixel on the display panel, and determine a driving sequence of each backlight area in the backlight unit according to the driving sequence of each pixel on the display panel;

[0127] The processing module is used to obtain image data, generate local dimming data of each backlight area according to the image data, and drive the driving unit of each backlight area according to the local dimming data of the backlight area and the driving sequence of each backlight area.

[0128] In some embodiments, the acquisition module is specifically configured to:

[0129] The backlight area corresponding to each pixel is determined, and the driving order of each pixel on the display panel is used as the driving order of the backlight area corresponding to each pixel.

[0130] In some embodiments, the acquisition module is specifically configured to:

[0131] If the driving order of each pixel on the display panel is to drive at least one row of pixels each time, the driving order of the backlight area corresponding to each pixel is determined to be to drive at least one row of backlight area each time.

[0132] In some embodiments, pixels arranged along a first direction are connected to a gate driver chip through scan lines, and pixels arranged along a second direction are connected to a source driver chip through data lines. The gate driver chip is used to send a scan signal to at least one scan line so that at least one row of pixels receives the scan signal, and the source driver chip sends data to all data lines so that all columns of pixels receive data.

[0133] In some embodiments, the processing module is specifically configured to:

[0134] Obtain image data of the current pixel, generate local dimming data of the current backlight area according to the image data of the current pixel, and send the local dimming data to the current driving unit;

[0135] The current backlight area corresponds to the area where the current pixel is located, and the current driving unit is the driving unit corresponding to the current backlight area.

[0136] In some embodiments, the processing module is specifically configured to:

[0137] A dimming data packet of the current driving unit is generated according to the local dimming data of the current backlight area and the address of the driving unit corresponding to the current backlight area, and the local dimming data packet is sent to the current driving unit.

[0138] In some embodiments, the processing module is specifically configured to:

[0139] A dimming data packet is generated according to the local dimming data, the preset delay time and the address of the driving unit, and the dimming data packet is sent to the current driving unit, so that the current driving unit delays lighting the backlight area based on the preset delay time after receiving the dimming data packet.

[0140] In some embodiments, the acquisition module is specifically configured to:

[0141] After waiting for the preset delay time, the dimming data packet is sent to the driver unit.

[0142] As shown in FIG. 13 , an embodiment of the present application provides a controller 400 , which includes a memory 401 and a processor 402 .

[0143] The memory 401 is used to store computer instructions executable by the processor;

[0144] The processor 402 implements each step of the method in the above embodiment when executing the computer instructions. For details, please refer to the relevant description in the above method embodiment.

[0145] Optionally, the memory 401 can be independent or integrated with the processor 402. When the memory 401 is independent, the controller further includes a bus for connecting the memory 401 and the processor 402.

[0146] An embodiment of the present application further provides a computer-readable storage medium, in which computer instructions are stored. When a processor executes the computer instructions, each step of the method in the above embodiment is implemented.

[0147] An embodiment of the present application further provides a computer program product, including computer instructions, which, when executed by a processor, implement the various steps of the method in the above embodiment.

[0148] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0149] It should be understood that the present application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for controlling a backlight unit, wherein: include: Acquiring a driving order of each pixel on the display panel, and determining a driving order of each backlight area in the backlight unit according to the driving order of each pixel on the display panel; Image data is acquired, local dimming data of each backlight area is generated according to the image data, and driving units of each backlight area are driven according to the local dimming data of the backlight area and in a driving sequence of each backlight area.

2. The control method according to claim 1, wherein: Determining the driving order of each backlight area in the backlight unit according to the driving order of each pixel on the display panel specifically includes: The backlight area corresponding to each pixel is determined, and the driving order of each pixel on the display panel is used as the driving order of the backlight area corresponding to each pixel.

3. The control method according to claim 2, wherein: The driving order of each pixel on the display panel is used as the driving order of the backlight area corresponding to each pixel, which specifically includes: If the driving order of each pixel on the display panel is to drive at least one row of pixels each time, the driving order of the backlight area corresponding to each pixel is determined to be to drive at least one row of the backlight area each time.

4. The control method according to claim 3, wherein: The pixels arranged along the first direction are connected to the gate driving chip through the scanning lines, and the pixels arranged along the second direction are connected to the source driving chip through the data lines. The gate driving chip is used to send a scanning signal to at least one scanning line so that at least one row of pixels receives the scanning signal, and the source driving chip sends data to all data lines so that all columns of pixels receive data.

5. The control method according to any one of claims 1 to 4, wherein: Acquiring image data, generating local dimming data of each backlight area according to the image data, and driving the driving units of each backlight area according to the driving order of each backlight area according to the local dimming data of the backlight area, specifically comprising: Acquire image data of a current pixel, generate local dimming data of a current backlight area according to the image data of the current pixel, and send the local dimming data to a current driving unit; The current backlight area corresponds to an area where the current pixel is located, and the current driving unit is a driving unit corresponding to the current backlight area.

6. The control method according to claim 5, wherein: Sending the local dimming data to the current driving unit specifically includes: A dimming data packet of the current driving unit is generated according to the local dimming data of the current backlight area and an address of a driving unit corresponding to the current backlight area, and the local dimming data packet is sent to the current driving unit.

7. The control method according to claim 6, wherein: Generate a dimming data packet of the current driving unit according to the local dimming data of the current backlight area and the address of the driving unit corresponding to the current backlight area, specifically including: The dimming data packet is generated according to the local dimming data, the preset delay time and the address of the driving unit, and the dimming data packet is sent to the current driving unit, so that the current driving unit delays lighting the backlight area based on the preset delay time after receiving the dimming data packet.

8. The control method according to claim 6, wherein: Sending the local dimming data packet to the current driving unit specifically includes: After waiting for the preset delay time, a dimming data packet is sent to the driver unit.

9. A controller, wherein: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 8 when executed by a processor.

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