TWI813334B - LED array dead pixel data return method and LED display device - Google Patents

Abstract

A method for returning dead pixel data in an LED array is applied to an LED display. The LED display includes a plurality of LED modules configured in series and receives a string of display data containing addressing information from a host computer to enable Each LED module displays a corresponding sub-screen. The method includes: setting a main control chip in each LED module to receive local dead pixel data provided by multiple local LED pixel groups. The module receives a first bad pixel data string, combines the local bad pixel data and the first bad pixel data string into a second bad pixel data string, and transmits the second bad pixel data string to all the previous level The LED module, wherein the first dead pixel data string includes the local dead pixel data in the subsequent stage and each LED module after the subsequent stage; and causing the first stage LED module to output its The generated second bad pixel data stream is sent to the host computer.

Description

LED array dead pixel data return method and LED display device

The present invention relates to a combined LED display, and in particular to a method for returning dead pixel data of a combined LED display.

In existing LED displays, when the lamp beads on the screen are damaged or short-circuited, dark spots or bright lines will be formed, which will affect the display effect. In order to solve the above problems, driver chips with the function of eliminating open and short circuits are generally used. In addition, the LED display screen must also let a host computer know the lamp beads of each LED module to decide whether to replace the LED module.

Please refer to Figure 1, which illustrates a block diagram of a conventional combined LED display. As shown in Figure 1, the combined LED display has a plurality of LED modules 10 configured in series and receives a series of display data containing addressing information from a host computer 20 so that each LED module 10 displays a corresponding In the sub-screen, each LED module 10 has a receiving card 11, a plurality of LED pixel groups 12 and a multi-function card 13.

The receiving card 11 receives a string of display data containing addressing information from the host computer 20 and reads corresponding display data from the string of display data containing addressing information to drive the LED pixel groups 12 to display a corresponding sub-screen, and The string of display data containing the addressing information is transmitted to the receiving card 11 of the LED module 10 at the next level through the multi-function card 13 .

In addition, the local driving circuits in the LED pixel groups 12 will detect the bad pixel information of the LED pixels in the LED pixel groups 12 and transmit it to the multi-function card 13 . In addition to receiving local bad pixel data provided by multiple local driving circuits, the multi-function card 13 also receives data from the subsequent LED module 10 Receive a first bad pixel data string, combine the local bad pixel data and the first bad pixel data string to form a second bad pixel data string, and transmit the second bad pixel data string to the previous stage via the receiving card 11 , wherein the first dead pixel data string includes the local dead pixel data in the next stage and each LED module 10 after the last stage.

In addition, please refer to FIG. 2 , which illustrates a block diagram of another existing combined LED display. As shown in Figure 2, the combined LED display has a plurality of LED modules 30 configured in series and receives a series of display data containing addressing information from a host computer 20 so that each LED module 30 displays a corresponding In the sub-screen, each LED module 30 has a receiving card 31, a plurality of LED pixel groups 32 and a multi-function card 33.

The receiving card 31 receives a string of display data containing addressing information from the host computer 20 and reads corresponding display data from the string of display data containing addressing information to drive the LED pixel groups 32 to display a corresponding sub-screen, and The string of display data containing the addressing information is sent to the receiving card 31 of the LED module 30 at the next level.

In addition, the local driving circuits in the LED pixel groups 32 will detect the bad pixel information of the LED pixels in the LED pixel groups 32 and transmit it to the multi-function card 33. The multi-function card 33 will then use the local driving circuits to The provided LED pixel dead pixel information is sent to the receiving card 31 . In addition to receiving the local bad pixel data provided by the multi-function card 33, the receiving card 31 also receives a first bad pixel data string from the subsequent LED module 30, and combines the local bad pixel data and the first bad pixel data. The strings form a second bad pixel data string, and the second bad pixel data string is transmitted to the previous stage, where the first bad pixel data string includes the next stage and each LED module 30 after the latter stage. The local bad pixel data.

However, the backhaul solutions in Figures 1 and 2 will increase the number of addressing IDs for each LED module, which is difficult to manage by software, and an increase in the number of cards will also increase the probability of errors. In other words, the backhaul solutions in Figures 1 and 2 all have the problems of complex systems, large volumes, high costs, and difficulty in maintenance.

In order to solve the above problems, a novel LED array dead pixel data return method is urgently needed in this field.

One purpose of the present invention is to disclose a method for returning data from dead pixels in an LED array, which can reduce the size and cost of an LED module by replacing a receiving card and a multi-function card with a main control chip.

Another object of the present invention is to disclose a method for returning dead pixel data in an LED array, which can reduce the number of IDs required to address an LED module by replacing a receiving card and a multi-function card with a main control chip.

Another object of the present invention is to disclose a method for returning data from dead pixels in an LED array, which can reduce the power consumption of an LED module by replacing a receiving card and a multi-function card with a main control chip.

In order to achieve the aforementioned purpose, a method for returning data of dead pixels in an LED array is proposed, which is applied to an LED display. The LED display includes a plurality of LED modules configured in series and receives a data from a host computer. The display data containing the addressing information is serialized so that each LED module displays a corresponding sub-screen. The method includes: setting a main control chip in each LED module to receive local dead pixels provided by multiple local LED pixel groups. data, receiving a first bad pixel data string from the LED module of the next stage, combining the local bad pixel data and the first bad pixel data string to form a second bad pixel data string, and converting the second bad pixel data string The dot data string is transmitted to the LED module of the previous stage, wherein the first bad pixel data string includes the local bad pixel data in the subsequent stage and each LED module after the subsequent stage; and the third The LED module in the first stage outputs the second bad pixel data string generated by it to the host computer.

In one embodiment, the local bad pixel data includes a pixel address and a damage state, and the damage state is an open circuit damage state or a short circuit damage state.

In one embodiment, the main control chip in each LED module has a memory to store the first bad pixel data string.

In one embodiment, each of the local LED pixel groups performs an open circuit detection operation and a short circuit detection operation on the plurality of LED units it contains to determine whether each of the LED units has the open circuit damage state or This short circuit damage condition.

In one embodiment, each of the local LED pixel groups has a plurality of driving circuits configured in series to correspondingly drive the LED units to perform the open circuit detection operation and the short circuit detection operation.

In order to achieve the above object, the present invention further proposes an LED display device, which has a plurality of LED modules in a series configuration. It receives a series of display data containing addressing information from a host computer so that each LED module A corresponding sub-screen is displayed, and the information of the dead pixels in the LED modules is transmitted to the host computer according to a dead pixel data return program. The program includes: using a master control in each LED module The chip receives local bad pixel data provided by multiple local LED pixel groups, receives a first bad pixel data string from the LED module at the next level, and combines the local bad pixel data and the first bad pixel data string. A second bad pixel data string, and transmitting the second bad pixel data string to the LED module of the previous stage, wherein the first bad pixel data string includes the subsequent stage and each LED after the latter stage The local bad pixel data in the module; and causing the first-level LED module to output the second bad pixel data string generated by it to the host computer.

In one embodiment, the local bad pixel data includes a pixel address and a damage state, and the damage state is an open circuit damage state or a short circuit damage state.

In one embodiment, the main control chip in each LED module has a memory to store the first bad pixel data string.

In one embodiment, each of the local LED pixel groups performs an open circuit detection operation and a short circuit detection operation on the plurality of LED units it contains to determine whether each of the LED units has the open circuit damage state or This short circuit damage condition.

In one embodiment, each of the local LED pixel groups has a plurality of driving circuits configured in series to correspondingly drive the LED units to perform the open circuit detection operation and the short circuit detection operation.

In order to enable the review committee to further understand the structure, characteristics and purpose of the present invention, drawings and detailed descriptions of preferred embodiments are attached as follows.

10:LED module

11:Receive card

12:LED pixel group

13:Multi-function card

20:Host computer

30:LED module

31:Receive card

32:LED pixel group

33:Multi-function card

100:LED module

101: Main control chip

102:LED pixel group

102a: Drive circuit

102b:LED unit

110:Host computer

Step a: Set up a main control chip in each LED module to receive local bad pixel data provided by multiple local LED pixel groups, receive a first bad pixel data string from the LED module at the next level, and The local bad pixel data and the first bad pixel data string form a second bad pixel data string, and the second bad pixel data string is transmitted to the LED module of the previous stage, wherein the first bad pixel The data string includes the local dead pixel data in the next level and each LED module after the last level.

Step b: Make the LED module of the first stage output the second bad pixel data string generated by it to the host computer

Figure 1 shows a block diagram of a conventional combined LED display.

Figure 2 shows a block diagram of another existing combined LED display.

FIG. 3 is a block diagram of an embodiment of the LED display device of the present invention.

FIG. 4 is a block diagram of an embodiment of the LED pixel group of the LED display device of FIG. 3 .

FIG. 5 is a flow chart illustrating an embodiment of the LED array dead pixel data return method according to the present invention.

Please refer to FIG. 3 , which illustrates a block diagram of an embodiment of the LED display device of the present invention. As shown in Figure 3, the LED display device has multiple LED modules 100 configured in series. It receives a series of display data containing addressing information from a host computer 110 so that each LED module 100 displays a corresponding sub-screen, and it transmits the information of the dead pixels in the LED modules 100 to the host computer 110 according to a dead pixel data return program, in which each LED module 100 has a main control chip 101 and multiple 102 LED pixel groups.

When transmitting display data, the main control chip 101 of each LED module 100 receives the string of display data containing addressing information from the previous stage, reads the corresponding display data of this level from the string of display data containing addressing information, and Assigned to each LED pixel group 102 so that these LED pixel groups 102 can display one of the sub-pictures, and transmit the series of display data containing the addressing information to the next-level LED module 100. In addition, the main control chip 101 may have a memory to store the series of display data including the addressing information.

Please refer to FIG. 4 , which illustrates a block diagram of an embodiment of the LED pixel group 102 . As shown in FIG. 4 , the LED pixel group 102 has a plurality of driving circuits 102 a configured in series to drive a plurality of LED units 102 b according to the display data provided by the main control chip 101 . In addition, each driving circuit 102a performs an open circuit detection operation and a short circuit detection operation on an LED unit 102b to determine whether the LED unit 102b has an open circuit damage state or a short circuit damage state, and will determine the open circuit damage state or short circuit damage state. The status information together with the display data is sent to the next driving circuit 102a. In this way, the last driving circuit 102a can return the pixel damage information of the LED pixel group 102 to the main control chip 101.

Specifically, the bad pixel data return program includes:

(1) In each LED module 100, the main control chip 101 is used to receive local bad pixel data provided by multiple LED pixel groups 102, and a first bad pixel data string is received from the LED module 100 of the next level, and the said The local bad pixel data and the first bad pixel data string form a second bad pixel data string, and the second bad pixel data string is transmitted to the LED module 100 of the previous stage, where the first bad pixel data string includes The local dead pixel data in the next stage and each LED module 100 after the last stage. That is, the LED module 100 of the last stage forwards its local bad pixel data to the last second stage, and the last second stage combines its local bad pixel data with the local bad pixel data of the last stage. in a stream of data and passed forward, and so on. In addition, the local bad pixel data may include pixel position information and damage status information (open circuit or short circuit), and the main control chip 101 in each LED module 100 may have a memory to store the first bad pixel data string. .

(2) Make the first-level LED module 100 output the second bad pixel data string generated by it to the host computer 110 for determining whether to replace an LED module 100.

According to the above description, the present invention discloses a data return method for LED array dead pixels. Please refer to FIG. 5 , which illustrates a flow chart of an embodiment of the LED array dead pixel data return method of the present invention, which is applied to an LED display. The LED display includes a plurality of LED modules configured in series. The group receives a series of display data containing addressing information from a host computer so that each LED module displays a corresponding sub-screen. As shown in Figure 5, the method includes: arranging a main control chip in each LED module to receive local bad pixel data provided by multiple local LED pixel groups, and the LED module at the next level receives a first a bad pixel data string, which combines the local bad pixel data and the first bad pixel data string to form a second bad pixel data string, and transmits the second bad pixel data string to the LED module of the previous stage, Wherein, the first bad pixel data string includes the local bad pixel data in the subsequent stage and each LED module after the subsequent stage (step a); and causing the first stage LED module to output its The generated second bad pixel data string is sent to the host computer (step b).

In each of the above steps, the local bad pixel data includes a pixel address and a damage state. The damage state is an open circuit damage state or a short circuit damage state; the main control chip in each LED module has a memory. To store the first bad pixel data string; each of the local LED pixel groups determines whether each of the LED units has an open circuit detection operation and a short circuit detection operation by performing an open circuit detection operation and a short circuit detection operation on the plurality of LED units it contains. The open circuit damage state or the short circuit damage state; and each of the local LED pixel groups has a plurality of drive circuits configured in series to correspondingly drive the LED units to perform the open circuit detection operation and the short circuit detection operation. .

Through the design disclosed above, the present invention has the following advantages:

1. The LED array dead pixel data return method of the present invention can reduce the size and cost of an LED module.

2. The LED array dead pixel data return method of the present invention can reduce the number of IDs required to address an LED module.

3. The LED array dead pixel data return method of the present invention can reduce the power consumption of an LED module.

What is disclosed in this case is a preferred embodiment. Any partial changes or modifications derived from the technical ideas of this case and easily inferred by those familiar with the art will not deviate from the scope of the patent rights of this case.

To sum up, regardless of the purpose, means and effects of this case, it shows that it is completely different from the conventional technology, and that the invention is practical first, and indeed meets the patent requirements for inventions. I sincerely ask the review committee to take a clear look and grant the patent as soon as possible for your benefit. Society is a prayer for the Supreme Being.

Step a: Set up a main control chip in each LED module to receive local bad pixel data provided by multiple local LED pixel groups, receive a first bad pixel data string from the LED module at the next level, and The local bad pixel data and the first bad pixel data string form a second bad pixel data string, and the second bad pixel data string is transmitted to the LED module of the previous stage, wherein the first bad pixel The data string includes the local dead pixel data in the next level and each LED module after the last level.

Step b: Make the LED module of the first stage output the second bad pixel data string generated by it to the host computer

Claims (10)

A method for returning dead pixel data in an LED array is applied to an LED display. The LED display includes a plurality of LED modules configured in series and receives a string of display data containing addressing information from a host computer to enable Each LED module displays a corresponding sub-screen. The method includes: setting a main control chip in each LED module to receive local dead pixel data provided by multiple local LED pixel groups. The module receives a first bad pixel data string, combines the local bad pixel data and the first bad pixel data string into a second bad pixel data string, and transmits the second bad pixel data string to all the previous level The LED module, wherein the first dead pixel data string includes the local dead pixel data in the subsequent stage and each LED module after the subsequent stage; and causing the first stage LED module to output its The generated second bad pixel data stream is sent to the host computer. For example, in the LED array dead pixel data return method described in item 1 of the patent application, the local dead pixel data includes a pixel address and a damage state, and the damage state is an open circuit damage state or a short circuit damage state. The LED array dead pixel data return method described in the patent scope item 1, wherein the main control chip in each LED module has a memory to store the first dead pixel data string. The LED array dead pixel data return method described in item 2 of the patent application, wherein each of the local LED pixel groups performs an open circuit detection operation and a short circuit detection operation on the plurality of LED units it contains. Test operation to determine whether each LED unit has the open circuit damage state or the short circuit damage state. The LED array dead pixel data return method described in item 4 of the patent application, wherein each of the local LED pixel groups has a plurality of drive circuits configured in series to correspondingly drive the LED units to perform the required tasks. Describe the open circuit detection operation and short circuit detection operation. An LED display device with multiple LED modules configured in series. It receives a string of display data containing addressing information from a host computer so that each LED module displays a corresponding sub-picture. above, and transmits the information of the dead pixels in the LED modules to the host computer according to a dead pixel data return procedure. The procedure includes: using a main control chip in each LED module to receive multiple local The local bad pixel data provided by the LED pixel group receives a first bad pixel data string from the LED module at the next stage, and combines the local bad pixel data and the first bad pixel data string to form a second bad pixel data string. data string, and transmit the second bad pixel data string to the LED module of the previous stage, wherein the first bad pixel data string includes all the LED modules of the subsequent stage and the subsequent stage. the local bad pixel data; and causing the first-level LED module to output the second bad pixel data string generated by it to the host computer. For example, in the LED display device described in Item 6 of the patent application, the local bad pixel data includes a pixel address and a damage state, and the damage state is an open circuit damage state or a short circuit damage state. The LED display device described in Item 6 of the patent scope, wherein the main control chip in each LED module has a memory to store the first bad pixel data string. The LED display device as described in Item 7 of the patent application, wherein each of the local LED pixel groups determines each of the LED units by performing an open circuit detection operation and a short circuit detection operation. Whether the LED unit has the open circuit damage state or the short circuit damage state. The LED display device as described in Item 9 of the patent application, wherein each of the local LED pixel groups has a plurality of drive circuits configured in series to correspondingly drive the LED units to perform the open circuit detection operation. and short circuit detection operation.

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