Light emitting diode backlight display system

Abstract

The invention provides a light-emitting diode backlight display system, which comprises an image processing unit, a first driving unit, a second driving unit and a multi-path read-back unit, and is characterized in that the image processing unit comprises a read-back interface, and the first driving unit and the second driving unit respectively comprise a light-emitting diode; the first driving unit is used for detecting a light emitting diode to obtain first detection information and sending the first detection information to the multi-path backward reading unit; the second driving unit is used for detecting the light emitting diode to obtain second detection information and sending the second detection information to the multi-path backward-reading unit; the multi-path backward reading unit is used for receiving the first detection information and the second detection information, determining target information according to the first detection information and the second detection information, and sending the target information to the image processing unit; and the image processing unit is used for reading back the target information through the read-back interface, so that the purpose that the image processing unit reads back the detection information of the multi-path driving path through one read-back interface is achieved, and the information transmission efficiency of the multi-path driving path is improved.

Description

Technical Field

[0001] The present invention relates to the field of computer technology, and in particular to a light emitting diode backlight display system. Background Art

[0002] Existing light-emitting diode (LED) backlight display systems are divided into two types: one driven directly by an image processing unit and the other driven by a driving control unit after being processed by the image processing unit. Among them, the LED backlight display system driven directly by the image processing unit includes an image processing unit and a single-channel driving unit path. The image processing unit includes a readback interface. The single-channel driving unit path includes at least one driving unit. The driving unit detects the detection information obtained by the light-emitting diode and sends the detection information to the image processing unit; the image processing unit reads back the detection information through the readback interface.

[0003] However, since the image processing unit has only one read-back interface, only the detection information sent by the driving unit on a single driving unit path can be read back through the read-back interface, and the detection information sent by the driving units on multiple driving paths cannot be read back. As a result, the LED backlight display system driven by the image processing unit is difficult to meet the demand of the image processing unit to read back the detection information sent by the driving units on multiple driving paths through one read-back interface. Summary of the invention

[0004] The present invention provides a light emitting diode backlight display system having two driving paths, realizing the purpose of an image processing unit reading back detection information of multiple driving paths through a read-back interface, meeting the demand of the image processing unit reading back detection information sent by driving units of multiple driving paths through a read-back interface, improving the information transmission efficiency of the multiple driving paths, and increasing the flexibility of information transmission of the LED backlight display system.

[0005] An embodiment of the present invention provides a light emitting diode backlight display system, the system comprising:

[0006] An image processing unit, a first driving unit, a second driving unit and a multi-channel readback unit, wherein the image processing unit includes a readback interface, the first driving unit belongs to a first driving path, the second driving unit belongs to a second driving path, and the first driving unit and the second driving unit both include light emitting diodes; wherein,

[0007] The first driving unit is used to detect the light emitting diode to obtain first detection information, and send the first detection information to the multi-channel read-back unit;

[0008] The second driving unit is used to detect the light emitting diode to obtain second detection information, and send the second detection information to the multi-channel read-back unit;

[0009] The multi-channel read-back unit is used to receive the first detection information and the second detection information, determine target information according to the first detection information and the second detection information, and send the target information to the image processing unit;

[0010] The image processing unit is used to read back the target information through the read-back interface.

[0011] In the above embodiment, the first detection information includes a first voltage, the second detection information includes a second voltage, and the multi-channel read-back unit is specifically used to determine that the target information is a low level when the first voltage / the second voltage is a low voltage, and to determine that the target information is a high level when the first voltage and the second voltage are both high voltages.

[0012] In the above embodiment, the multi-channel readback unit includes a first readback pin, a second readback pin and an AND gate. The multi-channel readback unit is specifically used to determine that the target information is a low level when the first voltage / the second voltage is a low voltage, and to determine that the target information is a high level when the first voltage and the second voltage are both high voltages, including: reducing the level of the readback pin whose received voltage is a low voltage to a low level through the AND gate, and performing an AND operation on the levels of the first readback pin and the second readback pin through the AND gate to output a low level, and determining that the target information is a low level; when the first voltage and the second voltage are high voltages, increasing the levels of the first readback pin and the second readback pin to a low level through the AND gate, and performing an AND operation on the levels of the first readback pin and the second readback pin through the AND gate to output a high level, and determining that the target information is a high level.

[0013] In the above embodiment, the image processing unit further includes a control power supply, and the image processing unit is specifically configured to determine a feedback voltage based on the target information and adjust the voltage of the control power supply to the feedback voltage.

[0014] In the above embodiment, the image processing unit is specifically used to determine the feedback voltage based on the target information and adjust the voltage of the control power supply to the feedback voltage, including: when the target information is the low level, determining that the feedback voltage is a low voltage and adjusting the voltage of the control power supply to a low voltage; when the target information is the high level, determining that the feedback voltage is a high voltage and adjusting the voltage of the control power supply to a high voltage.

[0015] In the above embodiment, the first detection information also includes first communication information, the second detection information also includes second communication information, and the multi-channel read-back unit is further specifically used to determine the target information according to the first communication information and the second communication information.

[0016] In the above embodiment, the multi-channel readback unit is further specifically used to determine the target information according to the first communication information and the second communication information, including: raising the level of the first readback pin to a high level through the AND gate, and lowering the level of the second readback pin to a low level, so that the first readback pin receives the first communication information and sends the first communication information to the AND gate, and the first communication information is determined as the target information through the AND gate; or, lowering the level of the first readback pin to a low level through the AND gate, and raising the level of the second readback pin to a high level, so that the second readback pin receives the second communication information and sends the second communication information to the AND gate, and the second communication information is determined as the target information through the AND gate.

[0017] In the above embodiment, the first communication information includes a first address and a first current brightness of the light-emitting diode corresponding to the first address, the second communication information includes a second address and a second current brightness of the light-emitting diode corresponding to the second address, and the image processing unit is further specifically used to, when the first current brightness and the first preset brightness corresponding to the first address are different, determine the first preset brightness as the first target brightness of the light-emitting diode, and send the first target brightness and the first address to the first driving unit; when the second current brightness and the second preset brightness corresponding to the second address are different, determine the second preset brightness as the second target brightness of the light-emitting diode, and send the second target brightness to the second driving unit.

[0018] In the above embodiment, the first driving unit is further used to adjust the first current brightness of the light-emitting diode corresponding to the first address to the first target brightness; the second driving unit is further used to adjust the second current brightness of the light-emitting diode corresponding to the second address to the second target brightness.

[0019] In the above embodiment, the first communication information also includes a first current temperature corresponding to the first address, and the second communication information also includes a second current temperature corresponding to the second address. The image processing unit is further specifically used to, when the first current temperature and the first preset temperature corresponding to the first address are different, determine the first preset temperature as the first target temperature of the light-emitting diode, and send the first target temperature and the first address to the first driving unit; when the second current temperature and the second preset temperature corresponding to the second address are different, determine the second target temperature of the light-emitting diode by the second preset temperature, and send the second target temperature and the second address to the second driving unit.

[0020] In the above embodiment, the first driving unit is further used to adjust the first current temperature corresponding to the first address to the first target temperature; the second driving unit is further used to adjust the second current temperature corresponding to the second address to the second target temperature.

[0021] In the above embodiment, the first detection information also includes first abnormality report information, the second detection information also includes second abnormality report information, and the image processing unit is further used to generate an abnormality handling prompt based on the first abnormality report information and / or the second abnormality report information.

[0022] The light-emitting diode backlight display system provided by the present invention comprises: an image processing unit, a first driving unit, a second driving unit and a multi-channel readback unit, the image processing unit comprises a readback interface, the first driving unit belongs to a first driving path, the second driving unit belongs to a second driving path, and the first driving unit and the second driving unit both comprise light-emitting diodes; wherein the first driving unit is used to detect the light-emitting diodes of the first driving path to obtain first detection information, and send the first detection information to the multi-channel readback unit; the second driving unit is used to detect the light-emitting diodes of the second driving path to obtain second detection information, and send the second detection information to the multi-channel readback unit; the multi-channel readback unit is used to receive the first detection information and the second detection information, determine target information according to the first detection information and the second detection information, and send the target information to the image processing unit; the image processing unit is used to read back the target information through the readback interface. Therefore, compared with the prior art, the light-emitting diode backlight display system provided by the present invention has two driving paths, and the detection information of the driving units of the two driving paths can be used to determine the target information that the image processing unit needs to read back through the multi-channel readback unit, and then the multi-channel readback unit sends the target information to the image processing unit, and the image processing unit reads back the target information through the readback interface, that is, the multi-channel readback unit determines the target information according to the detection information sent by the driving units of the multi-channel driving paths, and sends the target information to the image processing unit, and the image processing unit reads back the target information corresponding to the detection information of the multi-channel driving paths through the readback interface, which is equivalent to the image processing unit reading back the detection information of the multi-channel driving paths through a readback interface. The target information corresponds to the detection information sent by the driving unit, realizes the purpose of the image processing unit reading back the detection information of multiple driving paths through a read-back interface, meets the demand of the image processing unit to read back the detection information sent by the driving units of multiple driving paths through a read-back interface, improves the information transmission efficiency of the multiple driving paths, increases the flexibility of information transmission of the LED backlight display system, and solves the problem that the LED backlight display system driven by the image processing unit is difficult to meet the demand of the image processing unit to read back the detection information sent by the driving units of multiple driving paths through a read-back interface because the image processing unit can only read back the detection information sent by the driving unit on a single driving path through the read-back interface. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1is a structural schematic diagram of a light emitting diode backlight display system provided by an embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a multi-channel readback unit in a light emitting diode backlight display system provided by an embodiment of the present invention;

[0026] Figure 3 is another structural schematic diagram of the light emitting diode backlight display system provided by an embodiment of the present invention;

[0027] Figure 4 is another structural schematic diagram of the light emitting diode backlight display system provided by an embodiment of the present invention;

[0028] Figure 5 It is another structural schematic diagram of a multi-channel read-back unit in a light-emitting diode backlight display system provided by an embodiment of the present invention;

[0029] Figure 6 This is another structural schematic diagram of a multi-channel read-back unit in a light-emitting diode backlight display system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] 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.

[0031] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0033] Figure 1FIG. 1 is a schematic diagram of a structure of a light emitting diode backlight display system provided by an embodiment of the present invention. Figure 1 As shown, the light-emitting diode backlight display system provided by the present invention includes: an image processing unit 100, a first driving unit 110, a second driving unit 120 and a multi-channel read-back unit 130, the image processing unit 100 includes a read-back interface 1001, the first driving unit 110 belongs to the first driving channel, the second driving unit 120 belongs to the second driving channel, and the first driving unit 110 and the second driving unit 120 both include a light-emitting diode 1101; wherein the first driving unit 110 is used to detect the light-emitting diode 1101 of the first driving channel to obtain first detection information, and send the first detection information to the multi-channel read-back unit 130; the second driving unit 120 is used to detect the light-emitting diode 1101 of the second driving channel to obtain second detection information, and send the second detection information to the multi-channel read-back unit 130; the multi-channel read-back unit 130 is used to receive the first detection information and the second detection information, determine the target information according to the first detection information and the second detection information, and send the target information to the image processing unit 100; the image processing unit 100 is used to read back the target information through the read-back interface 1001.

[0034] The readback interface 1001 can be understood as a signal interface for receiving information; the first detection information can be understood as the detection information obtained by the first driving unit 110 detecting the light emitting diode 1101; the second detection information can be understood as the detection information obtained by the second driving unit 120 detecting the light emitting diode 1101. The target information can be understood as information determined according to the first detection information and the second detection information.

[0035] like Figure 2 As shown, the multi-channel readback unit 130 may include a first readback pin 1301 and a second readback pin 1302. The first readback pin 1301 may be used to receive first detection information of a first driving path, and the second readback pin 1302 may be used to receive second detection information of a second driving path.

[0036] In an optional embodiment, the multi-channel readback unit 130 can receive the first detection information through the first readback pin 1301, receive the second detection information through the second readback pin 1302, determine the target information based on the first detection information and the second detection information, and send the target information to the image processing unit 100; the image processing unit 100 reads back the target information through the readback interface 1001.

[0037] For example, the first driving unit 110 detects the light-emitting diode 1101 to obtain the first detection information S1, and sends the first detection information S1 to the multi-channel read-back unit 130; the second driving unit 120 detects the light-emitting diode 1101 to obtain the first detection information S2, and sends the first detection information S2 to the multi-channel read-back unit 130; the multi-channel read-back unit 130 receives the first detection information S1 through the first read-back pin 1301, receives the second detection information S2 through the second read-back pin 1302, determines the target information T according to the first detection information S1 and the second detection information S2, and sends the target information T to the image processing unit 100; the image processing unit 100 reads back the target information T through the read-back interface 1001.

[0038] In an optional embodiment, if Figure 3 As shown, the first driving path may include a plurality of first driving units 110, each of which includes a light emitting diode 1101; the second driving path may include a plurality of second driving units 120, each of which includes a light emitting diode 1101; each first driving unit 110 may be used to detect the light emitting diode 1101 to obtain first detection information, and send the first detection information to the multi-channel read-back unit 130; each second driving unit 120 may be used to detect the light emitting diode 1101 to obtain second detection information, and send the second detection information to the multi-channel read-back unit 130; the multi-channel read-back unit 130 may be used to receive the first detection information through the first read-back pin 1301, and the multi-channel read-back unit 130 may be used to receive the second detection information through the second read-back pin 1302, determine the target information according to the first detection information and the second detection information, and send the target information to the image processing unit 100; the image processing unit 100 may be used to read back the target information through the read-back interface 1001.

[0039] In a specific embodiment of the present invention, the first detection information includes a first voltage, the second detection information includes a second voltage, and the multi-channel read-back unit 130 is specifically used to determine that the target information is a low level when the first voltage / the second voltage is a low voltage, and to determine that the target information is a high level when the first voltage and the second voltage are both high voltages. The first voltage can be understood as the voltage of the first driving power supply on the first driving path obtained by the first driving unit 110 detecting the light-emitting diode 1101, and the second voltage can be understood as the voltage of the second driving power supply on the second driving path obtained by the second driving unit 120 detecting the light-emitting diode 1101; the first driving power supply can be understood as the power supply for supplying power to the first driving unit 110; and the second driving power supply can be understood as the power supply for supplying power to the second driving unit 120.

[0040] like Figure 2As shown, the multi-channel read-back unit 130 may include an AND gate 1311, and the AND gate 1311 is connected to the first read-back pin 1301 and the second read-back pin 1302 respectively. The AND gate 1311 can be used to receive the first detection information sent by the first read-back pin 1301 and the second detection information sent by the second read-back pin 1302, and determine the target information according to the first detection information and the second detection information; the AND gate 1311 can be understood as a basic logic gate circuit that performs an "AND" operation.

[0041] Since in the LED backlight display system, when the voltage fed back by the driving unit is a low voltage, it is necessary to increase the driving voltage of the driving power supply for the driving unit by reducing the feedback voltage, so as to ensure that the voltage of the light-emitting diode 1101 in the path where each driving unit is located reaches the preset voltage, wherein the preset voltage can be understood as the preset voltage of the light-emitting diode 1101, and the feedback voltage can be understood as the voltage of the control power supply for the image processing unit 100. For the LED backlight display system with multiple driving paths in the embodiment of the present invention, when the voltage of any driving path is a low voltage, the multiple readback unit 130 can output a low level, and then the image processing unit 100 determines to reduce the feedback voltage to a low voltage according to the low level, so as to achieve the purpose of reducing the feedback voltage to increase the driving voltage of the driving unit; when the voltage of each driving path is a high voltage, the multiple readback unit 130 can output a high level, and then the image processing unit 100 determines to increase the feedback voltage to a high voltage according to the high level, so as to achieve the purpose of increasing the feedback voltage to reduce the driving voltage of the driving unit.

[0042] In an optional implementation, the multi-channel readback unit 130 may receive the first voltage of the first driving path through the first readback pin 1301, and send the first voltage to the AND gate 1311 through the first readback pin 1301; receive the second voltage of the second driving path through the second readback pin 1302, and send the second voltage to the AND gate 1311 through the second readback pin 1302; when the first voltage / the second voltage is a low voltage, the multi-channel readback unit 130 reduces the level of the first readback pin 1301 to a low level through the AND gate 1311, and reduces the level of the second readback pin 1302 to a low level through the AND gate 1311, and sends the second voltage to the AND gate 1311 at the first readback pin 1301. 01 / When the level of the second readback pin 1302 is low, after the AND operation of the AND gate 1311, the multi-channel readback unit 130 outputs a low level through the AND gate 1311, determines the target information as a low level, and sends the target information to the image processing unit 100. The image processing unit 100 can determine that the feedback voltage is a low voltage according to the target information (low level); when the first voltage and the second voltage are both high voltages, the multi-channel readback unit 130 raises the level of the first readback pin 1301 to a high level through the AND gate 1311, and raises the level of the second readback pin 1302 to a high level through the AND gate 1311, and the feedback voltage is low. When the levels of the pins 1302 are all high, after the AND operation of the AND gate 1311, the multi-channel read-back unit 130 outputs a high level through the AND gate 1311, determines the target information as a high level, and sends the target information to the image processing unit 100. The image processing unit 100 can determine that the feedback voltage is a high voltage according to the target information (high level). In this way, when the voltage fed back by the driving unit is a low voltage, the driving voltage of the driving power supply for the driving unit can be reduced / increased by reducing / increasing the feedback voltage, so as to ensure that the voltage of the light-emitting diode 1101 in the path where each driving unit is located reaches the preset voltage, thereby ensuring that the LED backlight display system with multiple driving paths The driving unit in the LED backlight display system detects the normal transmission of the voltage information obtained by the path where it is located, so that the image processing unit 100 can adjust the voltage of the control power supply in real time according to the target information, thereby greatly reducing the overall energy consumption of the LED backlight display system. The driving unit in the LED backlight display system with multiple driving paths detects the voltage information obtained by the path where it is located, that is, the interrupt feedback signal of the LED backlight display system in the interrupt mode. Therefore, it is equivalent to achieving the purpose of normal transmission of the interrupt feedback signal of the LED backlight display system with multiple driving paths in the interrupt mode, thereby improving the transmission efficiency of the interrupt feedback signal of the LED backlight display system with multiple driving paths.

[0043] Table 1 Truth table of the AND operation corresponding to AND gate 1311

[0044] DO1 DO2 OUT 0 0 0 0 1 0 1 0 0 1 1 1

[0045] Table 1 is a truth table of the AND operation corresponding to the AND gate 1311 in the embodiment of the present invention, wherein a low level is represented by 0, a high level is represented by 1, DO1 represents the first read-back pin 1301, DO2 represents the second read-back pin 1302, and OUT represents the output level of the AND gate 1311. It can be seen from Table 1 that when DO1 is 0 / DO2 is 0, the OUT value is 0, that is, the output level of the AND gate 1311 is a low level; when DO1 is 1 and DO2 is 1, the OUT value is 1, that is, the output level of the AND gate 1311 is a high level.

[0046] For example, the first voltage is a low voltage and the second voltage is a high voltage; the first driving unit 110 detects the voltage of the light-emitting diode 1101 to obtain the first voltage. When the first voltage is less than a preset voltage, the first voltage is determined to be a low voltage and the first voltage is sent to the multi-channel read-back unit 130; the second driving unit 120 is specifically used to detect the voltage of the light-emitting diode 1101 to obtain the second voltage. When the second voltage is greater than a preset voltage, the second voltage is determined to be a high voltage and the second voltage is sent to the multi-channel read-back unit 130. The multi-channel readback unit 130 can receive the first voltage of the first driving path through the first readback pin 1301, and send the first voltage to the AND gate 1311 through the first readback pin 1301; receive the second voltage of the second driving path through the second readback pin 1302, and send the second voltage to the AND gate 1311 through the second readback pin 1302; the multi-channel readback unit 130 reduces the level of the first readback pin 1301 to a low level "0" through the AND gate 1311, and reduces the level of the second readback pin 1302 to a low level "0" through the AND gate 1311. When the level of the first readback pin 1301 / the second readback pin 1302 is a low level, after the "AND" operation of the AND gate 1311, the multi-channel readback unit 130 outputs a low level "0" through the AND gate 1311, and determines that the target information is a low level.

[0047] In a specific embodiment of the present invention, the image processing unit 100 also includes a control power supply, which is used to power the image processing unit 100. The image processing unit 100 is specifically used to determine the feedback voltage based on the target information and adjust the voltage of the control power supply to the feedback voltage. This can ensure that the image processing unit 100 adjusts the voltage of the control power supply in real time according to the target information, and ensures that the voltage of the light-emitting diode 1101 in the path where each drive unit is located is kept the same as the preset voltage in a timely manner, thereby greatly reducing the overall energy consumption of the LED backlight display system.

[0048] Since increasing the feedback voltage can reduce the voltage of the light-emitting diode 1101 in the path where each driving unit is located, and reducing the feedback voltage can increase the voltage of the light-emitting diode 1101 in the path where each driving unit is located. Therefore, in an optional embodiment, the image processing unit 100 can determine that the feedback voltage is a low voltage and adjust the voltage of the control power supply to a low voltage when the target information is a low level, and determine that the feedback voltage is a high voltage and adjust the voltage of the control power supply to a high voltage when the target information is a high level. In this way, it can be ensured that in the LED backlight display system with multiple driving paths, the image processing unit 100 can adjust the voltage of the control power supply in real time according to the target information, ensure that the voltage of the light-emitting diode 1101 in the path where each driving unit is located is kept at the same voltage as the preset voltage in a timely manner, and greatly reduce the overall energy consumption of the LED backlight display system.

[0049] For example, the first voltage is a low voltage, the second voltage is a high voltage, and the target information determined by the first voltage and the second voltage is a low level. When the target information is a low level, the image processing unit 100 determines that the feedback voltage is a low voltage, and adjusts the voltage of the control power supply to a low voltage, thereby ensuring that the first voltage of the light-emitting diode 1101 in the path detected by the first driving unit 110 reaches a preset voltage.

[0050] In a specific embodiment of the present invention, the first detection information also includes first communication information, the second detection information also includes second communication information, and the multi-channel read-back unit 130 is further specifically used to determine the target information according to the first communication information and the second communication information. The first communication information can be understood as the communication information obtained by the first driving unit 110 detecting the light-emitting diode 1101, and the second communication information can be understood as the communication information obtained by the second driving unit 120 detecting the light-emitting diode 1101.

[0051] When the level of the first readback pin 1301 is at a high level, the multiple readback unit 130 can receive the first detection information through the first readback pin 1301, and when the level of the first readback pin 1301 is at a low level, the multiple readback unit 130 cannot receive the first detection information through the first readback pin 1301; when the level of the second readback pin 1302 is at a high level, the multiple readback unit 130 can receive the second detection information through the second readback pin 1302, and when the level of the second readback pin 1302 is at a low level, the multiple readback unit 130 cannot receive the second detection information through the second readback pin 1302.

[0052] Therefore, in an optional embodiment, when the multi-channel readback unit 130 receives the first communication information and the second communication information, it can increase the level of the first readback pin 1301 and reduce the level of the second readback pin 1302 through the AND gate 1311, so that the first readback pin 1301 receives the first communication information and sends the first communication information to the AND gate 1311, and then the first communication information is determined as the target information through the AND gate 1311 and the target information is sent to the image processing unit 100; and then the level of the first readback pin 1301 is reduced through the AND gate 1311, and the level of the second readback pin 1302 is increased, so that the second readback pin 1302 receives the second communication information and sends the second communication information to the AND gate 1311, and then the second communication information is determined as the target information through the AND gate 1311 and the target information is sent to the image processing unit 100. Unit 100, and then lowers the level of the second read-back pin 1302 through the AND gate 1311, so that the image processing unit 100 can achieve the purpose of reading back the communication information of the multi-channel driving path through a read-back interface 1001, meet the image processing unit 100 through a read-back interface 1001 Read back the communication information sent by the driving unit of the multi-channel driving path, improve the information transmission efficiency of the multi-channel driving path, increase the flexibility of information transmission of the LED backlight display system, and solve the problem that the image processing unit 100 can only read back the communication information sent by the driving unit on a single driving path through the read-back interface 1001, resulting in the LED backlight display system driven by the image processing unit 100 being difficult to meet the image processing unit 100 Read back the communication information sent by the driving unit of the multi-channel driving path through a read-back interface 1001.

[0053] In a specific embodiment of the present invention, the first communication information includes a first address and a first current brightness of the light-emitting diode 1101 corresponding to the first address, and the second communication information includes a second address and a second current brightness of the light-emitting diode 1101 corresponding to the second address. The image processing unit 100 is specifically used to determine the first preset brightness as the first target brightness of the light-emitting diode 1101 when the first current brightness and the first preset brightness corresponding to the first address are different, and send the first target brightness and the first address to the first driving unit 110. The first driving unit 110 is also used to adjust the first current brightness of the light-emitting diode 1101 corresponding to the first address to the first target brightness; when the second current brightness and the second preset brightness corresponding to the second address are different, determine the second preset brightness as the second target brightness of the light-emitting diode 1101, and send the second target brightness to the second driving unit 120. The second driving unit 120 is also used to adjust the second current brightness of the light-emitting diode 1101 corresponding to the second address to the second target brightness. In this way, the image processing unit 100 can be realized according to the communication information. The target brightness information (the first current brightness and the second current brightness) is determined in real time based on the brightness information (the first target brightness and the second target brightness) in the information, and the target brightness information is sent to the driving unit through the output interface. The driving unit timely adjusts the brightness of the light-emitting diode 1101 to the target brightness, thereby reducing the overall energy consumption of the LED backlight display system. In addition, the image processing unit 100 can read back the brightness information of multiple driving paths through a read-back interface 1001, meet the demand of the image processing unit 100 to read back the brightness information sent by the driving units of multiple driving paths through a read-back interface 1001, improve the information transmission efficiency of the multiple driving paths, increase the flexibility of information transmission of the LED backlight display system, and solve the problem that the LED backlight display system driven by the image processing unit 100 is difficult to meet the demand of the image processing unit 100 to read back the brightness information sent by the driving units of multiple driving paths through a read-back interface 1001 because the image processing unit 100 can only read back the brightness information sent by the driving unit on a single driving path through the read-back interface 1001.

[0054] Among them, the first address can be understood as the address of the light-emitting diode 1101 in the first driving unit 110, and the second address can be understood as the address of the light-emitting diode 1101 in the second driving unit 120; the first current brightness can be understood as the brightness obtained by the first driving unit 110 detecting the light-emitting diode 1101 at the current time, and the first preset brightness can be understood as the preset brightness of the light-emitting diode 1101 in the first driving unit 110; the second current brightness can be understood as the brightness obtained by the second driving unit 120 detecting the light-emitting diode 1101 at the current time, and the second preset brightness can be understood as the preset brightness of the light-emitting diode 1101 in the second driving unit 120, and the first preset brightness and the second preset brightness can be the same or different.

[0055] In a specific embodiment of the present invention, the first communication information also includes a first current temperature corresponding to the first address, and the second communication information also includes a second current temperature corresponding to the second address. The image processing unit 100 is specifically used to determine the first preset temperature as the first target temperature of the light-emitting diode 1101 when the first current temperature and the first preset temperature corresponding to the first address are different, and send the first target temperature and the first address to the first driving unit 110. The first driving unit 110 is also used to adjust the first current temperature corresponding to the first address to the first target temperature; when the second current temperature and the second preset temperature corresponding to the second address are different, the second preset temperature is determined as the second target temperature of the light-emitting diode 1101, and the second target temperature and the second address are sent to the second driving unit 120. The second driving unit 120 is also used to adjust the second current temperature corresponding to the second address to the second target temperature. In this way, the image processing unit 100 can be implemented according to the temperature information in the communication information (the first current temperature and the second current temperature). ) determines the target temperature information (the first target temperature and the second target temperature) in real time, and sends the target temperature information to the driving unit through the output interface, and the driving unit timely adjusts the temperature of the light-emitting diode 1101 to the target temperature, thereby reducing the overall energy consumption of the LED backlight display system, and can achieve the purpose of the image processing unit 100 reading back the temperature information of multiple driving paths through a read-back interface 1001, meet the demand of the image processing unit 100 reading back the temperature information sent by the driving units of multiple driving paths through a read-back interface 1001, improve the information transmission efficiency of the multiple driving paths, increase the flexibility of information transmission of the LED backlight display system, and solve the problem that the image processing unit 100 can only read back the temperature information sent by the driving unit on a single driving path through the read-back interface 1001, resulting in the LED backlight display system driven by the image processing unit 100 being difficult to meet the demand of the image processing unit 100 reading back the temperature information sent by the driving units of multiple driving paths through a read-back interface 1001.

[0056] Among them, the first current temperature can be understood as the temperature obtained by the first driving unit 110 detecting the light-emitting diode 1101, and the first preset temperature can be understood as the preset temperature of the light-emitting diode 1101 in the first driving unit 110; the second current temperature can be understood as the temperature obtained by the second driving unit 120 detecting the light-emitting diode 1101, and the second preset temperature can be understood as the preset temperature of the light-emitting diode 1101 in the second driving unit 120. The first preset temperature and the second preset temperature can be the same or different.

[0057] In a specific embodiment of the present invention, the first detection information also includes first abnormality report information, the second detection information also includes second abnormality report information, and the image processing unit 100 is further used to generate an abnormality handling prompt based on the first abnormality report information and / or the second abnormality report information. In this way, the image processing unit 100 can achieve the purpose of reading back the abnormal information of multiple drive paths through a read-back interface 1001, meet the need of the image processing unit 100 to read back the abnormal information sent by the drive unit of the multiple drive paths through a read-back interface 1001, improve the information transmission efficiency of the multiple drive paths, and increase the flexibility of information transmission of the LED backlight display system.

[0058] Among them, the first abnormal report information can be understood as the abnormal information obtained by the first driving unit 110 based on the detection of the light-emitting diode 1101, which may include the temperature abnormality information, voltage abnormality information, etc. of the light-emitting diode 1101 of the first driving path; the second abnormal report information can be understood as the abnormal information obtained by the second driving unit 120 based on the detection of the light-emitting diode 1101, which may include the temperature abnormality information, voltage abnormality information, etc. of the light-emitting diode 1101 of the second driving path.

[0059] For example, the first abnormality report information may be first voltage abnormality information, and the image processing unit 100 may generate an abnormality handling prompt according to the first voltage abnormality information, so that a technician can handle the first voltage abnormality in a timely manner.

[0060] Optionally, if it is necessary to add driving paths in the LED backlight display system, it is only necessary to add AND gates and readback pins in the multi-channel readback unit 130 that are the same in number as the driving paths that need to be added.

[0061] In a specific embodiment of the present invention, Figure 4As shown, the LED backlight display system has three driving paths, and the LED backlight display system may further include a third driving unit 140, the third driving unit 140 belongs to the third driving path, and the third driving unit 140 includes a light emitting diode 1101; the third driving unit 140 is used to detect the light emitting diode 1101 to obtain third detection information, and send the third detection information to the multi-channel read-back unit 130; the multi-channel read-back unit 130 is used to receive the first detection information, the second detection information and the third detection information, determine the target information according to the first detection information, the second detection information and the third detection information, and send the target information to the image processing unit 100. For the LED backlight display system with three driving paths, as shown in FIG. Figure 5 As shown, an AND gate 1312 and a third readback pin 1303 can be added to the multi-channel readback unit 130, that is, the multi-channel readback unit 130 can include an AND gate 1311 and an AND gate 1312, the AND gate 1311 is connected to the first readback pin 1301 and the second readback pin 1302, the AND gate 1311 is connected to the AND gate 1312, and the AND gate 1312 is connected to the third readback pin 1303, and the third readback pin 1303 is used to receive the third detection information obtained by the third driving unit 140 detecting the light emitting diode 1101. In this way, the LED backlight display system provided by the embodiment of the present invention has better expansibility and flexibility of information transmission because the driving path of the LED backlight display system can be increased by adding an AND gate and a readback pin.

[0062] In an optional embodiment, the first detection information includes a first voltage, the second detection information includes a second voltage, and the third detection information includes a third voltage. The third voltage can be understood as the voltage of the third driving power supply on the third driving path obtained by the third driving unit 140 detecting the light-emitting diode 1101. The third driving power supply can be understood as a power supply used to power the third driving unit 140; the multi-channel read-back unit 130 is specifically used to determine that the target information is a low level when the first voltage / the second voltage / the third voltage is a low voltage, and to determine that the target information is a high level when the first voltage, the second voltage and the third voltage are all high voltages.

[0063] For example, the first voltage is a low voltage, the second voltage is a high voltage, and the third voltage is a low voltage; the first driving unit 110 detects the voltage of the light-emitting diode 1101 to obtain the first voltage, and when the first voltage is less than a preset voltage, the first voltage is determined to be a low voltage, and the first voltage is sent to the multi-channel read-back unit 130; the second driving unit 120 detects the voltage of the light-emitting diode 1101 to obtain the second voltage, and when the second voltage is greater than a preset voltage, the second voltage is determined to be a high voltage, and the second voltage is sent to the multi-channel read-back unit 130; the third driving unit 140 detects the voltage of the light-emitting diode 1101 to obtain the third voltage, and when the third voltage is less than the preset voltage, the third voltage is determined to be a low voltage, and the third voltage is sent to the multi-channel read-back unit 130. The multi-channel readback unit 130 can receive the first voltage of the first driving path through the first readback pin 1301, and send the first voltage to the AND gate 1311 through the first readback pin 1301; the multi-channel readback unit 130 can receive the second voltage of the second driving path through the second readback pin 1302, and send the second voltage to the AND gate 1311 through the second readback pin 1302; the multi-channel readback unit 130 can reduce the level of the first readback pin 1301 to a low level "0" through the AND gate 1311, and reduce the level of the second readback pin 1302 to a low level "0" through the AND gate 1311, and the first readback pin 1301 / the second readback pin 1302 are connected to the AND gate 1311. When the level of the pin 1302 is low, after the “AND” operation of the AND gate 1311, the multi-channel read-back unit 130 outputs the low level “0” through the AND gate 1311, and sends the low level “0” to the AND gate 1312. The multi-channel read-back unit 130 can receive the third voltage of the third driving path through the third read-back pin 1303, and send the third voltage to the AND gate 1312 through the third read-back pin 1303; the multi-channel read-back unit 130 can reduce the level of the third read-back pin 1303 to the low level “0” through the AND gate 1312, and output the low level “0” through the “AND” operation of the AND gate 1312, and send the low level “0” to the image processing unit 100.

[0064] In an optional implementation, the first detection information also includes first communication information, the second detection information also includes second communication information, the third detection information also includes third communication information, and the multi-channel read-back unit 130 is further specifically used to determine the first communication information, the second communication information and the third communication information as target information. The third communication information can be understood as the communication information obtained by the third driving unit 140 detecting the light emitting diode 1101.

[0065] When receiving the first communication information, the second communication information and the third communication information, the multi-channel readback unit 130 can increase the level of the first readback pin 1301 through the AND gate 1311 and reduce the level of the second readback pin 1302, so that the first readback pin 1301 receives the first communication information and sends the first communication information to the AND gate 1311, and then the first communication information is determined as the target information through the AND gate 1311 and the target information is sent to the image processing unit 100; then the level of the first readback pin 1301 is reduced through the AND gate 1311, and the level of the second readback pin 1302 is increased, so that the second readback pin 1302 receives the second communication information and sends the second communication information to the AND gate 1311, and then the second communication information is determined as the target information through the AND gate 1311 and the target information is sent to the image processing unit 100, and then the level of the second readback pin 1302 is reduced through the AND gate 1311, and the level of the third readback pin 1303 is increased through the AND gate 1312, so that The third read-back pin 1303 receives the third communication information and sends the third communication information to the AND gate 1312, and then the third communication information is determined as the target information through the AND gate 1312 and the target information is sent to the image processing unit 100. In this way, the image processing unit 100 can achieve the purpose of reading back the communication information of multiple driving paths through a read-back interface 1001, meet the demand of the image processing unit 100 to read back the communication information sent by the driving unit of multiple driving paths through a read-back interface 1001, improve the information transmission efficiency of the multiple driving paths, increase the flexibility of information transmission of the LED backlight display system, and solve the problem that the LED backlight display system driven by the image processing unit 100 is difficult to meet the demand of the image processing unit 100 to read back the communication information sent by the driving unit of multiple driving paths through a read-back interface 1001.

[0066] Optionally, in a specific embodiment of the present invention, Figure 6As shown, the multi-channel readback unit 130 may include a potential energy comparator 1330, which is connected to the first readback pin 1301 and the second readback pin 1302. The potential energy comparator 1330 can be used to obtain the first potential energy of the path where the first driving unit 110 is located / the second potential energy of the path where the second driving unit 120 is located. The multi-channel readback unit 130 can be used to determine whether to receive the first detection information / the second detection information according to the first potential energy / the second potential energy through the potential energy comparator 1330. In this way, the potential energy comparator 1330 can be used to determine whether to receive the first detection information / the second detection information. The detection information is detected, and then the target information that the image processing unit needs to read back is determined by the multi-channel readback unit according to the first detection information and the second detection information. The multi-channel readback unit sends the target information to the image processing unit, and the image processing unit reads back the target information through the readback interface, so as to achieve the purpose of the image processing unit reading back the detection information of the multi-channel driving path through a readback interface, meet the demand of the image processing unit to read back the detection information sent by the driving unit of the multi-channel driving path through a readback interface, improve the information transmission efficiency of the multi-channel driving path, and increase the flexibility of information transmission of the LED backlight display system.

[0067] In an optional embodiment, the multi-channel readback unit 130 can be used to increase the level of the first readback pin 1301 to a high level and lower the level of the second readback pin 1302 to a low level through the potential comparator 1330 when it is determined that the first potential energy belongs to the first potential energy interval through the potential comparator 1330 to receive the first detection information; when it is determined that the second potential energy belongs to the second potential energy interval through the potential comparator 1330, lower the level of the first readback pin to a low level and increase the level of the second readback pin 1302 to a high level through the potential comparator 1330 to receive the second detection information; then the multi-channel readback unit 130 determines the target information according to the first detection information and the second detection information. The specific logic for determining the target information is the same as above and will not be repeated here.

[0068] Optionally, the multi-channel read-back unit 130 may not include Figure 2The AND gate 1311 shown; in a specific embodiment of the present invention, the multi-channel read-back unit 130 can be used to determine a voltage combination according to the first voltage and the second voltage, and determine whether to receive the first detection information / the second detection information according to the voltage combination. In this way, whether to receive the first detection information / the second detection information can be determined according to the voltage combination, thereby realizing the target information that the image processing unit needs to read back through the first detection information and the second detection information of the multi-channel read-back unit, and the multi-channel read-back unit sends the target information to the image processing unit, and the image processing unit reads back the target information through the read-back interface, so as to realize the purpose of the image processing unit reading back the detection information of the multi-channel driving path through a read-back interface, and meet the need of the image processing unit to read back the detection information sent by the driving unit of the multi-channel driving path through a read-back interface, thereby improving the information transmission efficiency of the multi-channel driving path and increasing the flexibility of information transmission of the LED backlight display system.

[0069] For example, a low voltage is represented by 0 and a high voltage is represented by 1. The multi-channel readback unit 130 can be used to determine to increase the level of the first readback pin 1301 to a high level and to reduce the level of the second readback pin 1302 to a low level when the voltage combination is (1, 0) to receive the first detection information; the multi-channel readback unit 130 can be used to determine to increase the level of the second readback pin 1302 to a high level and to reduce the level of the first readback pin 1301 to a low level when the voltage combination is (0, 1) to receive the second detection information.

[0070] The light emitting diode 1101 backlight display system provided by the present invention comprises: an image processing unit 100, a first driving unit 110, a second driving unit 120 and a multi-channel read-back unit 130, the image processing unit 100 comprises a read-back interface 1001, the first driving unit 110 belongs to a first driving path, the second driving unit 120 belongs to a second driving path, and the first driving unit 110 and the second driving unit 120 both comprise a light emitting diode 1101; wherein the first driving unit 110 is used to detect the light emitting diode 1101 of the first driving path to obtain first detection information, and send the first detection information to the multi-channel read-back unit 130; the second driving unit 120 is used to detect the light emitting diode 1101 of the second driving path to obtain second detection information, and send the second detection information to the multi-channel read-back unit 130; the multi-channel read-back unit 130 is used to receive the first detection information and the second detection information, determine target information according to the first detection information and the second detection information, and send the target information to the image processing unit 100; the image processing unit 100 is used to read back the target information through the read-back interface 1001. Therefore, compared with the prior art, the light emitting diode 1101 backlight display system provided by the present invention has two driving paths, and the detection information of the driving units of the two driving paths can be used to determine the target information that the image processing unit 100 needs to read back through the multi-channel read-back unit 130, and then the multi-channel read-back unit 130 sends the target information to the image processing unit 100, and the image processing unit 100 reads back the target information through the read-back interface 1001, that is, the multi-channel read-back unit 130 determines the target information according to the detection information sent by the driving units of the multi-channel driving paths, and sends the target information to the image processing unit 100, and the image processing unit 100 reads back the target information corresponding to the detection information of the multi-channel driving paths through the read-back interface 1001, which is equivalent to the image processing unit 100 reading back multiple detection information through one read-back interface 1001. The invention can realize the purpose of the image processing unit 100 reading back the detection information of multiple driving paths through a read-back interface 1001, meet the demand of the image processing unit 100 reading back the detection information sent by the driving units of multiple driving paths through a read-back interface 1001, improve the information transmission efficiency of the multiple driving paths, increase the flexibility of information transmission of the LED backlight display system, and solve the problem that the image processing unit 100 can only read back the detection information sent by the driving unit on a single driving path through the read-back interface 1001, resulting in the LED backlight display system driven by the image processing unit 100 being difficult to meet the demand of the image processing unit 100 reading back the detection information sent by the driving units of multiple driving paths through a read-back interface 1001.

[0071] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting diode backlight display system, characterized in that: The system comprises: an image processing unit, a first driving unit, a second driving unit and a multi-channel readback unit, the image processing unit comprises a readback interface, the first driving unit belongs to a first driving path, the second driving unit belongs to a second driving path, the first driving unit and the second driving unit both comprise light emitting diodes; wherein, The first driving unit is used to detect the light emitting diode to obtain first detection information, and send the first detection information to the multi-channel read-back unit; The second driving unit is used to detect the light emitting diode to obtain second detection information, and send the second detection information to the multi-channel read-back unit; The multi-channel read-back unit is used to receive the first detection information and the second detection information, determine target information according to the first detection information and the second detection information, and send the target information to the image processing unit; The image processing unit is used to read back the target information through the read-back interface.

2. The system according to claim 1, characterized in that The first detection information includes a first voltage, the second detection information includes a second voltage, and the multi-channel read-back unit is specifically used to determine that the target information is a low level when the first voltage / the second voltage is a low voltage, and to determine that the target information is a high level when the first voltage and the second voltage are both high voltages.

3. The system according to claim 2, characterized in that The multi-channel readback unit includes a first readback pin, a second readback pin and an AND gate. The multi-channel readback unit is specifically used to determine that the target information is a low level when the first voltage / the second voltage is a low voltage, and to determine that the target information is a high level when the first voltage and the second voltage are both high voltages, including: reducing the level of the readback pin whose received voltage is a low voltage to a low level through the AND gate, and performing an AND operation on the levels of the first readback pin and the second readback pin through the AND gate to output a low level, and determining that the target information is a low level; when the first voltage and the second voltage are high voltages, increasing the levels of the first readback pin and the second readback pin to a low level through the AND gate, and performing an AND operation on the levels of the first readback pin and the second readback pin through the AND gate to output a high level, and determining that the target information is a high level.

4. The system according to claim 2, characterized in that The image processing unit further includes a control power supply, and the image processing unit is specifically configured to determine a feedback voltage based on the target information and adjust the voltage of the control power supply to the feedback voltage.

5. The system according to claim 4, characterized in that The image processing unit is specifically used to determine the feedback voltage based on the target information and adjust the voltage of the control power supply to the feedback voltage, including: determining that the feedback voltage is a low voltage and adjusting the voltage of the control power supply to a low voltage when the target information is the low level, and determining that the feedback voltage is a high voltage and adjusting the voltage of the control power supply to a high voltage when the target information is the high level.

6. The system according to claim 3, characterized in that The first detection information also includes first communication information, the second detection information also includes second communication information, and the multi-channel read-back unit is further specifically configured to determine the target information according to the first communication information and the second communication information.

7. The system according to claim 6, characterized in that The multi-channel readback unit is further specifically used to determine the target information according to the first communication information and the second communication information, including: raising the level of the first readback pin to a high level and lowering the level of the second readback pin to a low level through the AND gate, so that the first readback pin receives the first communication information and sends the first communication information to the AND gate, and determining the first communication information as the target information through the AND gate; or lowering the level of the first readback pin to a low level and raising the level of the second readback pin to a high level through the AND gate, so that the second readback pin receives the second communication information and sends the second communication information to the AND gate, and determining the second communication information as the target information through the AND gate.

8. The system according to claim 6, characterized in that The first communication information includes a first address and a first current brightness of the light-emitting diode corresponding to the first address, the second communication information includes a second address and a second current brightness of the light-emitting diode corresponding to the second address, and the image processing unit is further specifically used to, when the first current brightness and a first preset brightness corresponding to the first address are different, determine the first preset brightness as the first target brightness of the light-emitting diode, and send the first target brightness and the first address to the first driving unit; when the second current brightness and a second preset brightness corresponding to the second address are different, determine the second preset brightness as the second target brightness of the light-emitting diode, and send the second target brightness to the second driving unit.

9. The system according to claim 8, characterized in that The first driving unit is further used to adjust the first current brightness of the light-emitting diode corresponding to the first address to the first target brightness; the second driving unit is further used to adjust the second current brightness of the light-emitting diode corresponding to the second address to the second target brightness.

10. The system according to claim 8, characterized in that The first communication information also includes a first current temperature corresponding to the first address, and the second communication information also includes a second current temperature corresponding to the second address. The image processing unit is further specifically used to, when the first current temperature and the first preset temperature corresponding to the first address are different, determine the first preset temperature as the first target temperature of the light-emitting diode, and send the first target temperature and the first address to the first driving unit; when the second current temperature and the second preset temperature corresponding to the second address are different, determine the second target temperature of the light-emitting diode by the second preset temperature, and send the second target temperature and the second address to the second driving unit.

11. The system according to claim 10, characterized in that The first driving unit is further used to adjust the first current temperature corresponding to the first address to the first target temperature; the second driving unit is further used to adjust the second current temperature corresponding to the second address to the second target temperature.

12. The system according to claim 1, characterized in that The first detection information also includes first abnormality report information, and the second detection information also includes second abnormality report information. The image processing unit is further used to generate an abnormality handling prompt according to the first abnormality report information and / or the second abnormality report information.

Images