How to adjust the brightness consistency of the display screen

Abstract

The present invention discloses a method for adjusting the brightness consistency of a display screen, wherein a light-emitting module is connected to a driver IC, the driver IC has a built-in adjustable resistor, the resistance value of the adjustable resistor is debugged by debugging software, the resistance value is determined by the brightness of a lamp tube, the current value is read and written by the driver IC, the debugging software performs a read and write operation on the data, the resistance value of the resistor on the light-emitting module is read, and the set resistance value is written into the light-emitting module. By adopting a driver IC with a built-in resistor, not only the pulse width PMW value can be adjusted, but also the built-in resistance value of the driver IC can be adjusted, and the dual parameters are adjusted simultaneously, so that the brightness consistency of the entire display screen can be achieved more easily without losing brightness and chromaticity, making the product more energy-saving and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to a method for adjusting the brightness consistency of a display screen. Background Art

[0002] For a long time, due to manufacturing processes and other reasons, the characteristics of LEDs are very different. There is a 20% difference in the brightness of LED lamps, that is, there is a 20% difference in the three channels of red, green and blue. And due to cost pressure, it is generally believed that lamps with a wavelength difference of 5nm are qualified. When the display modules made of these different LEDs are integrated into LED display screens, if these differences are not adequately compensated, the differences in brightness and color of the LED display screens will be clearly visible; at the same time, after the LED display screens have been installed and used for a period of time, the brightness and color of the LEDs will decay and change over time, which will greatly reduce the visual quality of the LED display screens; in addition, the replacement of damaged LED modules during the use of the LED display screens will cause the new modules to not match the entire screen, which will also greatly reduce the visual quality of the LED display screens.

[0003] like Figure 1 As shown, the conventional light-emitting module adopts the mode of driver IC + external fixed resistor. The resistance value of the display screen cannot be adjusted during use. When the display screen is used to debug the brightness consistency, only the pulse width PMW value can be adjusted. When the external resistance value is fixed and the light-emitting conditions of the LED lamp beads themselves are fixed, in order to achieve brightness consistency, a lower pulse width PMW value is usually accommodated, which will lose a certain amount of brightness and chromaticity adjustment space. In addition, since the driver IC has no data storage function in the prior art, if the receiving card is damaged, it is necessary to use the software program control again, replace the receiving card, and send a new program. Therefore, it is necessary to study a solution to solve the above problems. Summary of the invention

[0004] In view of this, the present invention aims to solve the deficiencies in the prior art, and its main purpose is to provide a method for adjusting the brightness consistency of a display screen, which can not only adjust the pulse width PMW value, but also adjust the built-in resistance value of the driver IC.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A method for adjusting the brightness consistency of a display screen comprises connecting a light-emitting module to a driver IC, wherein the driver IC has a built-in adjustable resistor, the resistance value of the adjustable resistor is debugged through debugging software, and the resistance value is determined by the brightness of a lamp tube. The current value is read and written through the driver IC, and the debugging software is used to read and write data, read the resistance value of the resistor on the light-emitting module, and write the set resistance value into the light-emitting module.

[0007] As a preferred solution, the following steps are included:

[0008] (1) Determining the resistance value of the light-emitting module includes the following steps:

[0009] 1) Debug the light-emitting module through debugging software. When the light-emitting module reaches the preset brightness and chromaticity coordinate target values, the current resistance value of the driver IC with a built-in adjustable resistor in the light-emitting module is the ideal resistance value;

[0010] 2) The driver IC with built-in adjustable resistor sends the ideal resistance value to the receiving card;

[0011] 3) The receiving card receives the ideal resistance value and transmits it to the sending card;

[0012] 4) The sending card sends the ideal resistance value to the debugging software;

[0013] 5) The debugging software uploads the ideal resistance value to the cloud server in the mode of "order number + ideal resistance value";

[0014] (2) Writing into the light-emitting module includes the following steps:

[0015] 1) Upload the order number to the cloud server through the debugging software, retrieve the corresponding ideal resistance value stored in the cloud server according to the order number, and return it to the debugging software;

[0016] 2) The debugging software receives the ideal resistance value and sends it to the lighting machine;

[0017] 3) The lighting machine detects whether the state of the light-emitting module is normal; after receiving the signal that the state of the light-emitting module is normal, the lighting machine lights up the light-emitting module according to the ideal resistance value;

[0018] (3) When using the display, the user debugs the brightness consistency through the PC or mobile terminal. When debugging through the PC, the following steps are included:

[0019] 1) The PC is installed with debugging software, and the PC is connected to the receiving card and the sending card through the light-emitting module, and the resistance data is read and stored in the sending card and the receiving card;

[0020] 2) The debugging software can read and write, and read and write data through the sending card and receiving card;

[0021] When debugging via mobile, the following steps are included:

[0022] 1) Writing data to the chip during the production of the light-emitting module;

[0023] 2) Develop mobile debugging software;

[0024] 3) The mobile terminal establishes a connection with the PC terminal, transmits the data in the cloud server to control the sending card and then writes the data into the light-emitting module.

[0025] As a preferred solution, the driver IC is connected to a memory, and the output current of the driver IC is controlled by adjusting the internal register value of the memory, thereby controlling the brightness and chromaticity information of the display screen. At the same time, if the receiving card cannot send data, the information of a single light-emitting module is directly read back through the memory, thereby achieving two-way readback.

[0026] As a preferred solution, the model of the driver IC is SSOP24.

[0027] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0028] 1. By using a driver IC with built-in resistors, not only the pulse width PMW value can be adjusted, but also the built-in resistance value of the driver IC can be adjusted. By adjusting the two parameters at the same time, it is easier to achieve the consistency of the brightness of the entire display without losing brightness and chromaticity, making the product more energy-saving and reliable.

[0029] Second, by setting the memory, the existing data information can be stored in the memory. By adjusting the internal register value of the memory, the output current of the driver IC can be controlled, thereby controlling the brightness and chromaticity information of the display screen. At the same time, if the receiving card cannot send data, the single module information can be directly read back through the memory to achieve two-way readback.

[0030] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a brightness adjustment structure of a conventional light-emitting module in the prior art;

[0032] Figure 2 This is a block diagram of the principle structure of determining the resistance value of the light-emitting module in a preferred embodiment of the present invention;

[0033] Figure 3 It is a principle structural block diagram of a writing light-emitting module in a preferred embodiment of the present invention;

[0034] Figure 4 It is a principle structural block diagram of a preferred embodiment of the present invention in which a user debugs brightness consistency through a PC during use of a display screen;

[0035] Figure 5 It is a principle structural block diagram of a preferred embodiment of the present invention in which a user debugs brightness consistency through a mobile terminal during use of a display screen;

[0036] Figure 6 It is a schematic diagram of the principle structure of a preferred embodiment of the present invention;

[0037] Figure 7 is a pin diagram of a driver IC in a preferred embodiment of the present invention;

[0038] Figure 8 It is an overall flow chart of a preferred embodiment of the present invention.

[0039] Description of the accompanying drawings:

[0040] 11. Light-emitting module 12. Driver IC

[0041] 13. Receiving card 14. Sending card

[0042] 15. Cloud Server 16. Lighting Machine

[0043] 17. PC 18. Mobile

[0044] 19. PC side 20. Memory. DETAILED DESCRIPTION

[0045] The present invention discloses a method for adjusting the brightness consistency of a display screen. A light-emitting module 11 is connected to a driver IC 12. The driver IC 12 has a built-in adjustable resistor (not shown in the figure). The resistance value of the adjustable resistor is debugged through debugging software. The resistance value is determined by the brightness of the lamp tube. The current value is read and written through the driver IC 12. The debugging software is used to read and write data, read the resistance value of the resistor on the light-emitting module 11, and write the set resistance value into the light-emitting module.

[0046] Specifically, the following steps are included:

[0047] (1) Determine the resistance value of the light-emitting module 11, such as Figure 2 As shown, the following steps are included:

[0048] 1) Debugging the light-emitting module 11 through debugging software, when the light-emitting module 11 reaches the preset brightness and chromaticity coordinate target values, the current resistance value of the driving IC 12 with a built-in adjustable resistor in the light-emitting module 11 is the ideal resistance value;

[0049] 2) The driver IC 12 with built-in adjustable resistor sends the ideal resistance value to the receiving card 13;

[0050] 3) The receiving card 13 receives the ideal resistance value and transmits it to the sending card 14;

[0051] 4) The sending card 14 sends the ideal resistance value to the debugging software;

[0052] 5) The debugging software uploads the ideal resistance value to the cloud server 15 in the mode of "order number + ideal resistance value";

[0053] (2) Write to the light-emitting module 11, such as Figure 3 As shown, the following steps are included:

[0054] 1) Upload the order number to the cloud server 15 through the debugging software, retrieve the corresponding ideal resistance value stored in the cloud server 15 according to the order number, and return it to the debugging software;

[0055] 2) The debugging software receives the ideal resistance value and sends it to the lighting machine 16;

[0056] 3) The lighting machine 16 detects whether the state of the light-emitting module 11 is normal; after receiving the signal that the state of the light-emitting module 11 is normal, the lighting machine 16 lights up the light-emitting module 11 according to the ideal resistance value;

[0057] (3) When the user uses the display, he / she can debug the brightness consistency through the PC or mobile terminal. When debugging through the PC, such as Figure 4 As shown, the following steps are included:

[0058] 1) The PC terminal 17 is installed with debugging software, and the PC terminal 17 is connected to the receiving card 13 and the sending card 14 through the light-emitting module 11, and the resistance value data is read and stored in the sending card 14 and the receiving card 13;

[0059] 2) The debugging software can read and write, and read and write data through the sending card 14 and the receiving card 13;

[0060] When debugging through the mobile terminal 18, such as Figure 5 As shown, the following steps are included:

[0061] 1) Writing data to the chip during the production of the light-emitting module 11;

[0062] 2) Develop 18 debugging software for mobile terminals;

[0063] 3) The mobile terminal 18 establishes a connection by communicating with the PC terminal 19 , transmits the data in the cloud server 15 to control the sending card 14 and then writes the data into the light-emitting module 11 .

[0064] And, the model of the driver IC is SSOP24, and its pin arrangement is as follows Figure 7 As shown, and Figure 6 As shown, the driver IC 12 is connected to the memory 20, and the output current of the driver IC 12 is controlled by adjusting the internal register value of the memory 20, thereby controlling the brightness and chromaticity information of the display screen. At the same time, if the receiving card cannot send data, the information of a single light-emitting module 11 is directly read back through the memory 20, realizing two-way readback.

[0065] In addition, the overall process of the present invention is as follows Figure 8 As shown, first, determine the first piece, debug the first piece of the unit board according to the specified brightness and chromaticity coordinates, determine its resistance value, and write it into the storage chip; then, light up the lighting machine, and read back the resistance value stored in the storage chip register; then, during production, the lighting machine lights up the modules of the same batch with the corresponding order number and writes the corresponding resistance value; then, enter the client, the client system connects to the light-emitting module to read back the light-emitting module information, and writes the resistance value in the storage chip into the system.

[0066] The design focus of the present invention is: first, by adopting a driver IC with a built-in resistor, not only the pulse width PMW value can be adjusted, but also the built-in resistance value of the driver IC can be adjusted. The dual parameters are adjusted at the same time, which can more easily achieve the consistency of the brightness of the entire display screen without losing brightness and chromaticity, making the product more energy-saving and reliable. Secondly, by setting a memory, existing data information can be stored in the memory, and the output current of the driver IC can be controlled by adjusting the internal register value of the memory, thereby controlling the brightness and chromaticity information of the display screen. At the same time, if the receiving card cannot send data, the single module information can be directly read back through the memory to achieve two-way readback.

[0067] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A method for adjusting the brightness consistency of a display screen, wherein a light-emitting module is connected to a driver IC, characterized in that: The driver IC has a built-in adjustable resistor. The resistance value of the adjustable resistor is debugged through the debugging software. The resistance value is determined by the brightness of the lamp tube. The current value is read and written through the driver IC. The debugging software reads and writes data to read the resistance value on the light-emitting module and write the set resistance value into the light-emitting module. The driver IC is connected to a memory, and the output current of the driver IC is controlled by adjusting the internal register value of the memory, thereby controlling the brightness and chromaticity information of the display screen. At the same time, if the receiving card cannot send data, the information of a single light-emitting module is directly read back through the memory, realizing two-way readback; Determining the resistance value of the light-emitting module includes the following steps: 1) Debug the light-emitting module through debugging software. When the light-emitting module reaches the preset brightness and chromaticity coordinate target values, the current resistance value of the driver IC with a built-in adjustable resistor in the light-emitting module is the ideal resistance value; 2) The driver IC with built-in adjustable resistor sends the ideal resistance value to the receiving card; 3) The receiving card receives the ideal resistance value and transmits it to the sending card; 4) The sending card sends the ideal resistance value to the debugging software; 5) The debugging software uploads the ideal resistance value to the cloud server in the mode of "order number + ideal resistance value"; Writing the light-emitting module includes the following steps: 1) Upload the order number to the cloud server through the debugging software, retrieve the corresponding ideal resistance value stored in the cloud server according to the order number, and return it to the debugging software; 2) The debugging software receives the ideal resistance value and sends it to the lighting machine; 3) The lighting machine detects whether the state of the light-emitting module is normal; after receiving the signal that the state of the light-emitting module is normal, the lighting machine lights up the light-emitting module according to the ideal resistance value; During the use of the display, the user can debug the brightness consistency through the PC or mobile terminal. When debugging through the PC, the following steps are included: 1) The PC is installed with debugging software, and the PC is connected to the receiving card and the sending card through the light-emitting module, and the resistance data is read and stored in the sending card and the receiving card; 2) The debugging software can read and write, and read and write data through the sending card and receiving card; When debugging via mobile, the following steps are included: 1) Writing data to the chip during the production of the light-emitting module; 2) Develop mobile debugging software; 3) The mobile terminal establishes a connection with the PC terminal, transmits the data in the cloud server to control the sending card and then writes the data into the light-emitting module.

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