A method for controlling the lighting of LED backlight modules and backlight modules

Abstract

The present invention discloses a method for controlling the lighting of LED backlight modules by partitions and a backlight module. The control method comprises: a control chip receives image display information and divides the image display information into partition display information; a driver chip receives the image display information and divides the image display information into several partition display information according to several display partitions; a display unit required for displaying an image is extracted, and the number of times the LED lamp beads are reused is obtained according to the display unit analysis; the lighting frequency of each LED lamp bead is analyzed according to the number of times the LED lamp beads are reused; partition display driving information is generated according to the lighting frequency, and image display is completed based on the partition display driving information. The partition lighting control method processes the display image information by setting a multi-level driver chip, calculates the lighting frequency of each LED lamp bead, thereby achieving precise control of the LED lamp bead and effectively improving the display effect of the display module.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of LED display, and in particular to a method for controlling zone lighting of an LED backlight module and a backlight module. Background Art

[0002] Traditional direct-type LED display screens require all LED lamp beads to be lit during display, resulting in a large waste of power. The prior art generally adopts a control method of zone drive lighting, that is, by dividing the display area, each display area is provided with a separate driver to control the lighting of the LED lamp beads.

[0003] The current partition lighting control generally controls the lighting of the partitions participating in the display task according to the image display requirements. However, this control method does not accurately control the LED lamp beads in the partition, and the display effect of the display module needs to be further improved. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a partition lighting control method for an LED backlight module and a backlight module. The partition lighting control method processes the display image information by setting a multi-stage driving chip and calculates the lighting frequency of each LED lamp bead, thereby achieving precise control of the LED lamp beads and effectively improving the display effect of the display module.

[0005] The present invention provides a method for controlling the lighting of LED backlight modules in different zones, the method comprising:

[0006] The control chip receives the image display information and divides the image display information into partition display information;

[0007] The driving chip receives the image display information and divides the image display information into a plurality of partition display information according to a plurality of display partitions;

[0008] Extract the display unit required to display the image, and obtain the reuse times of the LED lamp beads according to the display unit analysis;

[0009] According to the reuse times of LED lamp beads, analyze the lighting frequency of each LED lamp bead;

[0010] The partition display driving information is generated according to the lighting frequency, and the image display is completed based on the partition display driving information.

[0011] Furthermore, the control chip receives the image display information and divides the image display information into partition display information, including:

[0012] The control chip receives image information sent by an external image signal source, and the control chip combines the image display information with the display size of the display area to generate image display information according to the display size of the display area.

[0013] Furthermore, the driving chip receives the image display information and divides the image display information into a plurality of partition display information according to a plurality of display partitions, including:

[0014] The primary driving chip receives the image display information, and extracts the partition display image from the image display information through the image extraction frame;

[0015] The first-level driver chip positions and marks the extracted partition display image to generate partition display information.

[0016] Furthermore, the primary driving chip receives the image display information, and extracts the partition display image from the image display information through the image extraction frame, including:

[0017] The primary driving chip generates an image extraction frame according to the display size of the display partition, performs image extraction on the image display information through the image extraction frame, and divides the image information into a plurality of partition display information.

[0018] Furthermore, the first-level driving chip performs positioning marking on the extracted partition display image, and generates partition display information including:

[0019] The primary driver chip marks the position of each display partition according to the access positions of several secondary driver chips, and performs positioning marking on each intercepted image information in combination with the position mark to generate the partition display information.

[0020] Furthermore, the extraction of the display unit required to display the image and the number of reuses of the LED lamp beads obtained by analyzing the display unit include:

[0021] The secondary driving chip extracts the display units required to complete the image display in the display partition according to the partition display information;

[0022] According to the positions of several display units, analysis is performed to obtain each LED lamp bead involved in image display and the number of reuses of each LED lamp bead.

[0023] Furthermore, the secondary driving chip extracts the display unit required to complete the image display in the display partition according to the partition display information, including:

[0024] The secondary driving chip performs grayscale value processing on the display image in the partition display information according to the partition display information to obtain a gray value map of the partition display;

[0025] The secondary driving chip analyzes the gray value map to obtain the color display intensity of each position in the partition display image.

[0026] Furthermore, the analysis of the lighting frequency of each LED lamp bead according to the reuse times of the LED lamp bead includes:

[0027] Performing a ratio analysis on the number of times the LED lamp beads in the display partition are turned on to obtain a lighting ratio of each LED lamp bead;

[0028] The secondary driving chip analyzes the lighting frequency of the LED lamp beads per unit time according to the lighting ratio.

[0029] The present invention provides an LED backlight module, and the LED backlight module is used to execute the LED backlight module zone lighting control method;

[0030] The LED backlight module comprises a substrate, a display area and a control area are arranged on the substrate, and a plurality of display subareas are arranged in the display area;

[0031] At least one driving chip and a plurality of LED lamp beads are arranged in any of the display partitions, and the driving chip is connected to drive the plurality of LED lamp beads.

[0032] Furthermore, the plurality of LED lamp beads include at least three different light colors, and the plurality of LED lamp bead arrays are arranged in the display partition;

[0033] The light colors of any two adjacent LED lamp beads are different.

[0034] The present invention provides a method for controlling the lighting of LED backlight modules and a backlight module. The method for controlling the lighting of LED backlight modules is to set a multi-stage driving chip.

[0035] The present invention provides a zone lighting control method for an LED backlight module and a backlight module. The zone lighting control method processes display image information by setting a multi-stage driving chip and calculates the lighting frequency of each LED lamp bead, thereby achieving precise control of the LED lamp beads and effectively improving the display effect of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a schematic diagram of the structure of an LED backlight module in an embodiment of the present invention;

[0038] Figure 2 It is a schematic diagram of the arrangement structure of LED lamp beads in a display partition in an embodiment of the present invention;

[0039] Figure 3 is a schematic diagram of a first wiring structure in an embodiment of the present invention;

[0040] Figure 4 is a schematic diagram of a second wiring structure in an embodiment of the present invention;

[0041] Figure 5 This is a flow chart of a method for controlling the lighting of LED backlight modules in different zones according to an embodiment of the present invention;

[0042] Figure 6 It is a flowchart of the image processing of the driver chip in the implementation of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] Figure 1 FIG. 1 shows a schematic diagram of the structure of an LED backlight module in an embodiment of the present invention. Figure 2 A schematic diagram of the LED lamp bead arrangement structure in the display partition in an embodiment of the present invention is shown, the LED backlight module includes a substrate 1, a control area 11 and a display area 12 are provided on the substrate 1, a plurality of display partitions 121 are provided in the display area 12, and the plurality of display partitions 121 are arranged in an array in the display area 12.

[0045] Specifically, a driving chip and a control chip 2 are arranged on the substrate 1, the control chip 2 is located in the control area 11, the driving chip includes a primary driving chip 3 and several secondary driving chips 4, several of the secondary chips are arranged on the back of the substrate 1, and several of the secondary driving chips 4 are correspondingly arranged at positions corresponding to several of the display partitions 121.

[0046] Furthermore, a plurality of LED lamp beads 6 are disposed in any of the display partitions 121 , and the plurality of LED lamp beads 6 are arranged in an array in the display partition 121 , and the light colors emitted by any two adjacent LED lamp beads 6 are different.

[0047] Specifically, within the display partition 121, any three LED lamp beads 6 with different display primary colors can constitute a display unit. By arranging the LED lamp beads 6 in an array, the LED lamp beads 6 form a virtual pixel arrangement structure, so that a number of virtual pixels are formed in the display partition 121, thereby improving the display resolution of the display module.

[0048] Specifically, the control chip 2 and the primary driving chip 3 are arranged in the control area 11 , the control chip 2 is electrically connected to the primary driving chip 3 , and the primary driving chip 3 is used to receive the image display information of the control chip 2 .

[0049] Furthermore, a bus 13 and a first circuit layer 14 are provided on the front side of the substrate 1 , a plurality of LED lamp beads 6 in the display area 12 are connected to the bus 13 based on the first circuit layer 14 , and the control chip 2 is connected to the bus 13 .

[0050] Specifically, a plurality of through holes are provided on the substrate 1, and a connecting copper column 17 is provided in any of the through holes. A second circuit layer is provided on the back side of the substrate 1, and a plurality of LED lamp beads 6 are electrically connected to the second circuit layer based on the connecting copper column 17. By arranging the secondary driving chip 4 and the second circuit layer on the back side of the substrate 1, the heat dissipation path between the secondary driving chip 4 and the LED lamp beads 6 is increased, thereby improving the heat dissipation effect of the secondary driving chip 4 and the LED lamp beads 6.

[0051] Specifically, Figure 3 FIG. 1 shows a schematic diagram of the structure of the first wiring 15 in an embodiment of the present invention. Figure 4 A schematic diagram of the structure of the second wiring 16 in an embodiment of the present invention is shown, where the second circuit layer includes a first wiring 15 and a second wiring 16, wherein the first wiring 15 is arranged at a position corresponding to the display area 12, one end of the second wiring 16 is arranged at a position corresponding to the display area 12, and the other end is arranged at a position corresponding to the control area 11.

[0052] Furthermore, a plurality of connection ports are provided on the first wiring 15, and any of the LED lamp beads 6 is electrically connected to the connection port, and the driving connection pins of the secondary driving chip 4 are electrically connected to the connection ports based on welding wires, that is, any of the LED lamp beads 6 is connected to the connection pins of the secondary driving chip 4 based on the connection copper column 17 and the second circuit layer.

[0053] Furthermore, the driving connection pin of the first-level driving chip 3 is electrically connected to the second wiring 16 based on the connecting copper column 17, one end of the second wiring 16 is electrically connected to the connection pin of the first-level driving chip 3, and the other end of the second wiring 16 is electrically connected to the second-level driving chip 4, that is, the first-level driving chip 3 and the second-level driving chip 4 are electrically connected based on the second wiring 16.

[0054] Furthermore, the primary driver chip 3 may send partition display information to the secondary driver chip 4 , and the secondary driver chip 4 may adjust the brightness of the LED lamp beads 6 in the display partition 121 based on the partition display information.

[0055] Specifically, the LED backlight module is provided with a secondary driving chip 4 on the back of the substrate 1, and the secondary driving chip 4 drives and controls the LED lamp beads 6 in the display partition 121, and the primary driving chip 3 regulates multiple secondary driving chips 4, thereby simplifying the circuit arrangement of the LED display module.

[0056] Figure 5 The flowchart of the LED backlight module partition lighting control method in an embodiment of the present invention is shown. The LED backlight module partition lighting control method includes:

[0057] S11: The control chip 2 receives image display information and divides the image display information into partition display information.

[0058] Specifically, the control chip 2 is connected to an external image signal source, the control chip 2 receives image information sent by the external image signal source, and the control chip 2 combines the image display information and the display size of the display area 12 to generate image display information according to the display size of the display area 12.

[0059] S12 : The driving chip receives the image display information and divides the image display information into a plurality of partition display information according to a plurality of display partitions 121 .

[0060] Specifically, the primary driving chip 3 receives the image display information, and the primary driving chip 3 generates a plurality of partition display information according to the array arrangement of a plurality of display partitions 121 in the display area 12 .

[0061] Furthermore, the primary driver chip 3 sends a number of the partition display information to a number of the secondary driver chips 4 accordingly, and the secondary driver chip 4 adjusts the light emission of the LED lamp beads 6 in the display partition 121 based on the partition display information.

[0062] Specifically, Figure 6The flowchart of the image processing of the driver chip in the implementation of the present invention is shown. The driver chip receives the image display information and divides the image display information into several partition display information according to several display partitions 121, including:

[0063] S121: the primary driving chip 3 receives the image display information, and extracts the partition display image from the image display information through the image extraction frame.

[0064] Specifically, the primary driving chip 3 generates an image extraction frame according to the display size of the display partition 121, and extracts the image display information through the image extraction frame, thereby dividing the image information into a plurality of partition display information.

[0065] Furthermore, the first-level driving chip 3 reads the image display information, takes the lower left corner of the image in the image display information as the starting point of the image extraction frame, drives the image extraction frame to move along a preset path within the image display information, and intercepts the image information within the image display information each time it moves.

[0066] S122: The primary driving chip 3 performs positioning marking on the extracted partition display image to generate partition display information.

[0067] Specifically, the primary driver chip 3 marks the position of each display partition 121 according to the positions of the connection pins connected to several secondary driver chips 4, and the primary driver chip 3 marks the position of each intercepted image information in combination with the position mark, thereby generating the partition display information.

[0068] Furthermore, the primary driving chip 3 sends the partition display information to the secondary driving chip 4 based on the positioning mark, so as to ensure that the secondary driving chip 4 can accurately display the image information.

[0069] S13: extract the display unit required to display the image, and obtain the reuse times of the LED lamp bead 6 according to the analysis of the display unit.

[0070] Specifically, the secondary driving chip 4 extracts the display units required to complete the image display in the display partition 121 according to the partition display information, analyzes the positions of several display units, and obtains each LED lamp bead 6 participating in the image display and the number of reuses of each LED lamp bead 6.

[0071] Furthermore, by analyzing the positions of the display units and the overlapping positions of each display unit, the LED lamp beads 6 at the overlapping positions of every two display units are in a multiplexing state.

[0072] Specifically, the extraction of the display unit required for displaying the image and obtaining the reuse times of the LED lamp bead 6 according to the display unit analysis include: the secondary driving chip 4 performs grayscale value analysis on the display image in the display partition 121 according to the partition display information.

[0073] Specifically, the secondary driving chip 4 performs grayscale value processing on the display image in the partition display information according to the partition display information to obtain a gray value map of the partition display, and the secondary driving chip 4 analyzes the gray value map to obtain the color display intensity of each position in the partition display image.

[0074] Furthermore, the secondary driving chip 4 extracts the display units required to complete the partition display image according to the grayscale values ​​at different positions of the grayscale map, so that the display partition 121 can achieve a good display effect.

[0075] S14: Analyze the lighting frequency of each LED lamp bead 6 according to the reuse times of the LED lamp bead 6.

[0076] Specifically, the secondary driving chip 4 performs a ratio analysis on the lighting times of the LED lamp beads 6 in the display partition 121 according to the reuse times of each LED lamp bead 6 , so as to obtain the lighting ratio of each LED lamp bead 6 .

[0077] Furthermore, the lighting ratio can reflect the working proportion of each LED lamp bead 6 in the display partition 121 when a display operation of the partition display information is completed.

[0078] Specifically, the secondary driving chip 4 analyzes the lighting frequency of the LED lamp beads 6 per unit time according to the lighting ratio, including: analyzing the proportion of the LED lamp beads 6 displayed per unit time according to the lighting ratio, that is, allocating a ratio of the display time of each LED lamp bead 6 according to the lighting ratio.

[0079] Furthermore, the lighting time of the LED lamp beads 6 is allocated according to the different reuse times of the LED lamp beads 6 and the display ratio of the LED lamp beads 6. By controlling and adjusting the lighting time of each LED lamp bead 6, the display brightness of each LED lamp bead 6 is adjusted, so that the image display in the display partition 121 can achieve high contrast and high resolution effects.

[0080] Specifically, the secondary driving chip 4 generates a lighting frequency of each LED lamp bead 6 according to the display duration of each LED lamp bead 6 in the display partition 121 and the number of reuses of each LED lamp bead 6, and drives the LED lamp bead 6 to perform a lighting operation according to the LED lighting frequency, so that the display partition 121 achieves a good display effect.

[0081] Furthermore, since the unit time required for display processing of a partition display information within the display partition 121 is short, the LED lamp bead 6 has a visual persistence effect when displaying. By adjusting the frequency of each LED lamp bead 6 and adjusting the display contrast of the display partition 121 according to the display time of each LED lamp bead 6, the display resolution of the display module can be effectively improved and the display effect can be improved.

[0082] S15: generating partition display driving information according to the lighting frequency, and completing image display based on the partition display driving information.

[0083] Specifically, the secondary driving chip 4 generates the partition display driving information according to the lighting frequency, including: the secondary driving chip 4 registers a number for each LED lamp bead 6 according to the wiring conditions of the plurality of LED lamp beads 6 in the display partition 121, so as to register the address of each LED lamp bead 6.

[0084] Furthermore, the secondary driving chip 4 analyzes and obtains the lighting frequency of each LED lamp bead 6 , and generates driving information of the LED lamp bead 6 according to the address label signal of the LED lamp bead 6 and the lighting frequency of the LED lamp bead 6 .

[0085] Specifically, after the secondary driving chip 4 calculates the lighting frequency of each LED lamp bead 6 in the display partition 121 and allocates the addressing, it generates driving information for each LED lamp bead 6, thereby obtaining the partition display driving information of the display partition 121. The secondary driving chip 4 allocates the partition display driving information according to the address number, thereby lighting up the LED lamp bead 6 in the display partition 121.

[0086] Specifically, the partition lighting control method of the LED backlight module involved in the embodiment of the present invention processes the display image information by setting a multi-stage driving chip, analyzes the display units participating in the image display in the display partition 121, and calculates the lighting duration of the LED lamp bead 6 in combination with the number of reuses of each LED lamp bead 6, and obtains the lighting frequency of each LED lamp bead 6, thereby achieving precise control of the LED lamp bead 6 and effectively improving the display effect of the display module.

[0087] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the storage medium may include: a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, etc.

[0088] In addition, the above is a detailed introduction to a LED backlight module zone lighting control method and a backlight module provided in an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A method for controlling the lighting of LED backlight modules, characterized in that: The control method comprises: The control chip receives the image display information and divides the image display information into partition display information; The driving chip receives the image display information and divides the image display information into a plurality of partition display information according to a plurality of display partitions; Extract the display unit required to display the image, and obtain the reuse times of the LED lamp beads according to the display unit analysis; According to the reuse times of LED lamp beads, analyze the lighting frequency of each LED lamp bead; Generating partition display driving information according to the lighting frequency, and completing image display based on the partition display driving information; The driving chip receives the image display information and divides the image display information into a plurality of partition display information according to a plurality of display partitions, including: The primary driving chip receives the image display information, and extracts the partition display image from the image display information through the image extraction frame; The first-level driver chip positions and marks the extracted partition display image and generates partition display information; The extraction of the display unit required for displaying the image and the analysis of the number of reuses of the LED lamp beads obtained according to the display unit include: The secondary driving chip extracts the display units required to complete the image display in the display partition according to the partition display information; According to the positions of several display units, each LED lamp bead involved in image display and the number of reuses of each LED lamp bead are obtained; The analysis of the lighting frequency of each LED lamp bead according to the reuse times of the LED lamp bead includes: Performing a ratio analysis on the number of times the LED lamp beads in the display partition are turned on to obtain a lighting ratio of each LED lamp bead; The secondary driving chip analyzes the lighting frequency of the LED lamp beads per unit time according to the lighting ratio.

2. The LED backlight module zone lighting control method according to claim 1, characterized in that: The control chip receives the image display information and divides the image display information into partition display information, including: The control chip receives image information sent by an external image signal source, and the control chip combines the image display information with the display size of the display area to generate image display information according to the display size of the display area.

3. The LED backlight module zone lighting control method according to claim 1, characterized in that: The first-level driving chip receives the image display information, and extracts the partition display image from the image display information through the image extraction frame, including: The primary driving chip generates an image extraction frame according to the display size of the display partition, performs image extraction on the image display information through the image extraction frame, and divides the image information into a plurality of partition display information.

4. The LED backlight module zone lighting control method according to claim 1, characterized in that: The first-level driving chip performs positioning marking on the extracted partition display image, and generates partition display information including: The primary driver chip marks the position of each display partition according to the access positions of several secondary driver chips, and performs positioning marking on each intercepted image information in combination with the position mark to generate the partition display information.

5. The LED backlight module zone lighting control method according to claim 1, characterized in that: The secondary driving chip extracts the display unit required to complete the image display in the display partition according to the partition display information, including: The secondary driving chip performs grayscale value processing on the display image in the partition display information according to the partition display information to obtain a gray value map of the partition display; The secondary driving chip analyzes the gray value map to obtain the color display intensity of each position in the partition display image.

6. An LED backlight module, characterized in that: The LED backlight module is driven and controlled based on the partition lighting control method according to any one of claims 1 to 5, and the LED backlight module comprises a substrate, a display area and a control area are arranged on the substrate, and a plurality of display partitions are arranged in the display area; At least one driving chip and a plurality of LED lamp beads are arranged in any of the display partitions, and the driving chip is connected to drive the plurality of LED lamp beads.

7. The LED backlight module according to claim 6, characterized in that: The plurality of LED lamp beads include at least three different light colors, and the plurality of LED lamp bead arrays are arranged in the display partition; The light colors of any two adjacent LED lamp beads are different.

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