CN214752881U

CN214752881U - Adjusting structure for brightness consistency of display screen

Info

Publication number: CN214752881U
Application number: CN202120634513.3U
Authority: CN
Inventors: 朱志强; 朱卫平; 洪荣辉
Original assignee: Fujian Qiangli Photoelectricity Co Ltd
Current assignee: Fujian Qiangli Photoelectricity Co Ltd
Priority date: 2021-03-29
Filing date: 2021-03-29
Publication date: 2021-11-16
Anticipated expiration: 2031-03-29

Abstract

The utility model discloses a regulating structure of the brightness consistency of a display screen, which comprises a light-emitting module, a driving IC, a receiving card, a sending card and a debugging device provided with debugging software; the drive IC is internally provided with an adjustable resistor, the drive IC is connected with the light-emitting module, the receiving card is connected with the light-emitting module, the sending card is connected with the receiving card, and the debugging device is connected with the sending card. Through the drive IC who adopts built-in resistance, not only can adjust pulse width PMW value, and can adjust drive IC's built-in resistance, the simultaneous adjustment of biparameter can reach the uniformity of whole display screen luminance under the prerequisite of not losing luminance and colourity more easily, makes energy-conserving, reliable more of product.

Description

Adjusting structure for brightness consistency of display screen

Technical Field

The utility model belongs to the technical field of the display screen technique and specifically relates to indicate a regulation structure of display screen luminance uniformity.

Background

Conventionally, due to manufacturing processes and other reasons, the characteristics of LEDs are very different, and the brightness of LED light points is 20% different, that is, the brightness of red, green and blue channels is 20% different. Also, due to cost pressure, lamp points with wavelengths that differ by 5nm are generally considered acceptable. When the display modules made of the LEDs with the differences are integrated into the LED display screen, if the differences are not compensated sufficiently, the differences of the brightness and the color of the LED display screen are clearly visible; meanwhile, after the LED display screen is installed and used for a period of time, the brightness and the chromaticity of the LED will change along with the attenuation of the time, which causes the visual quality of the LED display screen to be greatly reduced; in addition, the replacement of the damaged LED module in the use process of the LED display screen causes the mismatching of a new module and the whole screen, and the visual quality of the LED display screen can be greatly reduced.

As shown in fig. 1, a conventional light emitting module adopts a mode of driving an IC + an external fixed resistor, a resistance value of a display screen cannot be adjusted in use, when the display screen is used for adjusting brightness uniformity, only a pulse width PMW value can be adjusted, and in order to achieve brightness uniformity, a lower pulse width PMW value is usually obtained under the conditions that the external resistance value is fixed and the light emitting conditions of LED lamp beads are fixed, so that a certain adjustment space of brightness and chromaticity is lost. In addition, in the prior art, the driver IC has no data storage function, and therefore, if the receiving card is damaged, the software program is required to be used again for control, the receiving card is replaced, and a new program is transmitted. Therefore, there is a need to develop a solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to the deficiency of the prior art, and the main objective of the present invention is to provide a structure for adjusting the brightness uniformity of a display panel, which can not only adjust the pulse width PMW value, but also adjust the built-in resistance of the driver IC.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a regulating structure for the brightness consistency of a display screen comprises a light-emitting module, a drive IC, a receiving card, a sending card and a debugging device provided with debugging software; the drive IC is internally provided with an adjustable resistor, the drive IC is connected with the light-emitting module, the receiving card is connected with the light-emitting module, the sending card is connected with the receiving card, and the debugging device is connected with the sending card.

Preferably, the driver IC is built in the light emitting module, and the memory is further connected to the driver IC.

Preferably, the driver IC is model number SSOP 24.

As a preferable scheme, the debugging device is a PC terminal, and the debugging software is installed in the PC terminal.

As a preferable scheme, the debugging device includes a PC terminal and a mobile terminal, the PC terminal is connected to the cloud server, the mobile terminal is connected to the PC terminal, and the debugging software is installed in the mobile terminal.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:

firstly, through the drive IC who adopts built-in resistance, not only can adjust pulse width PMW value, and can adjust drive IC's built-in resistance, the dual parameter is adjusted simultaneously, can reach the uniformity of whole display screen luminance under the prerequisite of not losing luminance and colourity more easily, makes energy-conservation, reliable more of product.

And meanwhile, if the receiving card cannot send data, the single module information can be directly read back through the memory, so that bidirectional readback is realized.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a brightness adjusting structure of a conventional light emitting module in the prior art;

FIG. 2 is a block diagram of a schematic structure for determining the resistance of the light emitting module according to the preferred embodiment of the present invention;

FIG. 3 is a block diagram of the writing light module according to the preferred embodiment of the present invention;

FIG. 4 is a block diagram of the principle structure of the present invention, wherein the user can debug the brightness uniformity through the PC terminal during the operation of the display screen;

FIG. 5 is a block diagram of the principle structure of the preferred embodiment of the present invention, wherein the user can adjust the brightness uniformity by moving the mobile terminal during the operation of the display screen;

FIG. 6 is a schematic diagram of the preferred embodiment of the present invention;

FIG. 7 is a pin diagram of the driver IC in a preferred embodiment of the present invention;

fig. 8 is an overall flow chart of the preferred embodiment of the present invention.

The attached drawings indicate the following:

11. light emitting module 12 and driver IC

13. Receiving card 14 and sending card

15. Memory 20 and debugging device

21. PC terminal 22, PC terminal

23. Mobile terminal 30 and cloud server

40. The machine is lighted.

Detailed Description

Fig. 2 to 7 show a specific structure of a structure for adjusting brightness uniformity of a display screen according to a preferred embodiment of the present invention, which includes a light emitting module 11, a driving IC12, a receiving card 13, a sending card 14, and a debugging device 20 installed with debugging software.

The driver IC12 has a built-in adjustable resistor (not shown), the driver IC12 is connected to the light emitting module 11, the receiving card 13 is connected to the light emitting module 11, the transmitting card 14 is connected to the receiving card 13, and the debugging device 20 is connected to the transmitting card 14. In the present embodiment, the driver IC12 is built in the light emitting module 11, and the memory 15 is connected to the driver IC 12. The model of the driving IC12 is SSOP 24. The debugging apparatus 20 is a PC terminal 21, the debugging software is installed in the PC terminal 21, of course, the debugging apparatus 20 may also include a PC terminal 22 and a mobile terminal 23, the PC terminal 22 is connected to the cloud server 30, the mobile terminal 23 is connected to the PC terminal 22, the debugging software is installed in the mobile terminal 23, and the mobile terminal 23 is a mobile phone or a tablet computer.

The utility model also discloses a regulation method of display screen luminance uniformity, adopt aforementioned regulation structure of display screen luminance uniformity, to send out optical module 11 and connect driver IC12, this driver IC12 embeds adjustable resistor (not shown in the figure), adjustable resistor's resistance is debugged through debugging software, the resistance is decided by fluorescent tube luminance, the current value reads and writes through driver IC12, read and write operation is carried out data through debugging software, read the resistance on the optical module 11 that gives out light, and write in the resistance that will set for and send out optical module.

Specifically, the method comprises the following steps:

(1) determining the resistance value of the light emitting module 11, as shown in fig. 2, includes the following steps:

1) debugging the light-emitting module 11 through debugging software, wherein when the light-emitting module 11 reaches the preset target values of brightness and chromaticity coordinates, the current resistance value of the drive IC12 with the built-in adjustable resistor in the light-emitting module 11 is the ideal resistance value;

2) the driver IC12 having the built-in adjustable resistor transmits the desired resistance value to the receiving card 13;

3) the receiving card 13 receives the ideal resistance value and then transmits the ideal resistance value to the sending card 14;

4) the transmitting card 14 transmits the ideal resistance value to the debugging software;

5) the debugging software uploads the ideal resistance value to the cloud server 15 in a mode of 'order number + ideal resistance value';

(2) the write light module 11, as shown in fig. 3, includes the following steps:

1) uploading the order number to the cloud server 30 through the debugging software, retrieving the corresponding ideal resistance value stored in the cloud server 30 according to the order number, and returning the ideal resistance value to the debugging software;

2) the debugging software receives the ideal resistance value and then sends the ideal resistance value to the lighting machine 40;

3) the lighting machine 40 detects whether the state of the light emitting module 11 is normal; after receiving the normal status signal of the light emitting module 11, the lighting machine 40 lights the light emitting module 11 according to the ideal resistance value;

(3) the user debugs the brightness consistency through the PC terminal 21 or the mobile terminal 23 during the use of the display screen, and when debugging through the PC terminal 21, as shown in fig. 4, the method includes the following steps:

1) the PC end 21 is provided with debugging software, the PC end 21 is connected with the receiving card 13 and the sending card 14 through the light-emitting module 11, and the read resistance value data is stored in the sending card 14 and the receiving card 13;

2) the debugging software can read and write, and data is read and written through the sending card 14 and the receiving card 13;

when debugging is performed through the mobile terminal 23, as shown in fig. 5, the method includes the following steps:

1) writing data into the chip when the light-emitting module 11 is produced;

2) developing debugging software of the mobile terminal 23;

3) the mobile terminal 23 establishes a connection through communication with the PC terminal 22, and the data in the transmission cloud server 30 controls the transmission card 14 to write the data into the light emitting module 11.

And the type of the driving IC is SSOP24, the pin arrangement of the driving IC is as shown in fig. 7, and as shown in fig. 6, the driving IC12 is connected with the memory 15, and controls the output current of the driving IC12 by adjusting the register value inside the memory 15, so as to control the luminance and chromaticity information of the display screen, and meanwhile, if the receiving card cannot send data, the memory 15 directly reads back the information of the single light emitting module 11, so as to realize bidirectional readback.

In addition, the whole flow of the present invention is as shown in fig. 8, first, determining the first piece, debugging the first piece of the unit board according to the specified brightness and chromaticity coordinates, determining the resistance value, and writing the resistance value into the memory chip; then, the lighting machine is lighted, and the lighting machine reads back the resistance value stored in the register of the storage chip; then, production is carried out, and the module lighters in the same batch corresponding to the order number to lighten and write the corresponding resistance value; then, the client system is connected with the light-emitting module to read back the information of the light-emitting module and write the resistance value in the storage chip into the system.

The utility model discloses a design focus lies in: firstly, by adopting the drive IC with the built-in resistor, the pulse width PMW value can be adjusted, the built-in resistance value of the drive IC can be adjusted, and the dual-parameter simultaneous adjustment can achieve the brightness consistency of the whole display screen on the premise of not losing brightness and chromaticity more easily, so that the product is more energy-saving and reliable. Secondly, through setting up the memory, can store current data information in the memory, through the steerable drive IC output current of adjusting memory internal register value to control display screen luminance, colourity information, simultaneously, if the receiving card can not send data, the accessible memory directly reads back single module information, realizes two-way readback.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an adjust structure of display screen luminance uniformity which characterized in that: the device comprises a light-emitting module, a drive IC, a receiving card, a sending card and a debugging device provided with debugging software; the drive IC is internally provided with an adjustable resistor, the drive IC is connected with the light-emitting module, the receiving card is connected with the light-emitting module, the sending card is connected with the receiving card, and the debugging device is connected with the sending card.

2. The adjusting structure of the brightness uniformity of the display screen according to claim 1, wherein: the driving IC is built in the light-emitting module, and the driving IC is also connected with a memory.

3. The adjusting structure of the brightness uniformity of the display screen according to claim 1, wherein: the model of the drive IC is SSOP 24.

4. The adjusting structure of the brightness uniformity of the display screen according to claim 1, wherein: the debugging device is a PC end, and the debugging software is installed in the PC end.

5. The adjusting structure of the brightness uniformity of the display screen according to claim 1, wherein: the debugging device comprises a PC end and a mobile end, the PC end is connected with the cloud server, the mobile end is connected with the PC end, and the debugging software is installed in the mobile end.