CN102903345A - Method and device for adjusting brightness of liquid crystal splicing system - Google Patents

Abstract

The present invention is applicable to the technical field of display units, and provides a method and system for adjusting the brightness of a liquid crystal splicing system. The method includes: adjusting the brightness value, contrast value, and backlight value of each display unit in the liquid crystal splicing system to 100; Monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value 100 at the same time until the brightness of each display unit meets the preset benchmark; according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100 , calculate the register values corresponding to other preset backlight values; generate multiple backlight curves according to the above backlight values and the register values corresponding to the above backlight values; adjust each Brightness of the display unit. The present invention ensures that the brightness consistency of each display unit in the liquid crystal large-screen splicing system is guaranteed.

Description

A method and device for adjusting the brightness of a liquid crystal splicing system

technical field

The invention belongs to the technical field of display units, and in particular relates to a method and a device for adjusting the brightness of a liquid crystal splicing system.

Background technique

LCD large screen splicing system has become a major application in the field of monitoring technology. The quality of the image quality of the LCD large-screen splicing system depends on the subjective color difference of each LCD screen in the splicing system, and the premise of adjusting the color difference is to adjust the brightness consistency of each LCD screen.

In order to adjust the brightness consistency of each LCD screen, the usual method is to correct the parameter GAMMA value of each LCD screen. This is time-consuming and laborious, and the production efficiency is greatly reduced, which cannot meet the needs of mass production.

Contents of the invention

Embodiments of the present invention provide a method, device and system for adjusting the brightness of a liquid crystal splicing system, aiming to solve the problem that the prior art cannot meet the needs of mass production.

On the one hand, a method for adjusting the brightness of a liquid crystal splicing system is provided, the method comprising:

Adjust the brightness value, contrast value, and backlight value of each display unit in the LCD splicing system to 100;

Monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value 100 at the same time, until the brightness of each display unit meets the preset benchmark;

According to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100, calculate the register value corresponding to other preset backlight values;

Generate a plurality of backlight curves according to the above backlight value and the register value corresponding to the above backlight value;

The brightness of each display unit is adjusted according to the input backlight value and the backlight curve corresponding to the backlight value.

On the other hand, a system for adjusting the brightness of a liquid crystal splicing system is provided, including a display unit core module and a liquid crystal splicing system equipped for the display unit core module, the liquid crystal splicing system includes a plurality of display units, the The system for adjusting the brightness of the liquid crystal splicing system also includes: a debugging control terminal and a color temperature meter, the debugging control terminal and the core module of the display unit are connected through a first communication interface, and the connection between the debugging control terminal and the color temperature meter are connected through the second communication interface;

The debugging control terminal includes:

A parameter value adjustment unit, configured to adjust the brightness value, contrast value, and backlight value of each display unit in the liquid crystal splicing system to 100 through the first communication interface;

The register value adjustment unit is used to monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value 100 at the same time, until the brightness of each display unit meets the preset benchmark;

The color temperature meter includes a probe, which is used to measure the brightness of each display unit through the probe, and transmit it to the register value adjustment unit of the debugging control terminal through the second communication interface;

The display unit movement module includes:

The first register value acquiring unit is configured to calculate register values corresponding to other preset backlight values according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100;

A backlight curve generating unit, configured to generate multiple backlight curves according to the above-mentioned backlight value and the register value corresponding to the above-mentioned backlight value;

The brightness adjustment unit is used to adjust the brightness of each display unit according to the backlight value input by the debugging control terminal and the backlight curve corresponding to the backlight value.

In another aspect, a display unit movement module is provided, and the display unit movement module includes:

The first register value acquiring unit is configured to calculate register values corresponding to other preset backlight values according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100;

A backlight curve generating unit, configured to generate multiple backlight curves according to the above-mentioned backlight value and the register value corresponding to the above-mentioned backlight value;

The brightness adjustment unit is configured to adjust the brightness of each display unit according to the input backlight value and the backlight curve corresponding to the backlight value.

In the embodiment of the present invention, the brightness value, contrast value, and backlight value of each display unit in the LCD splicing system are first adjusted to 100, and then the brightness of each display unit is monitored, and the register value corresponding to the backlight value of 100 is adjusted at the same time until The brightness of each display unit meets the preset benchmark, so that the brightness consistency of each display unit in the LCD large-screen splicing system is guaranteed.

Description of drawings

Fig. 1 is a flowchart of the implementation of the method for adjusting the brightness of the liquid crystal splicing system provided by Embodiment 1 of the present invention;

Fig. 2 is a structural block diagram of a system for adjusting brightness of a liquid crystal splicing system provided by Embodiment 2 of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the embodiment of the present invention, the brightness value, contrast value, and backlight value of each display unit in the LCD splicing system are first adjusted to 100, and then the brightness of each display unit is monitored, and the register value corresponding to the backlight value of 100 is adjusted at the same time until The brightness of each display unit meets the preset benchmark, so that the brightness consistency of each display unit in the LCD large-screen splicing system is guaranteed.

The realization of the present invention is described in detail below in conjunction with specific embodiment:

Embodiment one

Figure 1 shows the implementation process of the method for adjusting the brightness of the LCD splicing system provided by Embodiment 1 of the present invention, which is described in detail as follows:

In step S101, the brightness value, contrast value, and backlight value of each display unit in the liquid crystal splicing system are all adjusted to 100.

In this embodiment, firstly, the signal generator inputs 100% white signal to the core module of the display unit, and then the debugging control terminal adjusts the splicing of the display unit through the communication interface connected to the core module of the display unit, such as a serial port. The brightness value, contrast value, and backlight value of each display unit in the system are all 100.

In step S102, the brightness of each display unit is monitored, and the register value corresponding to the backlight value 100 is adjusted at the same time until the brightness of each display unit meets a preset benchmark.

In this embodiment, the debugging control terminal is connected to the color temperature meter through a communication interface, which may be a serial port, and the debugging control terminal obtains the brightness measured by the probe of the color temperature meter from each display unit in real time through the serial port. The debugging control terminal can adjust the register value corresponding to the backlight value 100 in real time according to the brightness until the brightness meets the preset benchmark, where the benchmark is a typical value of the maximum full-screen brightness specified in the specification of the large-screen LCD screen. Of course, some errors can also be allowed. In this embodiment, the maximum brightness error generated by debugging is controlled within 0 to 5 nit.

Through this step, the brightness consistency of each display unit in the LCD large-screen splicing system is guaranteed. On this basis, the color difference consistency adjustment of the LCD large-screen splicing system is carried out, so that the subjective feeling of good color difference consistency in the large-screen splicing system is significantly improved. improve. In addition, it also makes the LCD large-screen splicing system more flexible in factory and after-sale adjustments.

Specifically, read the brightness measured by the probe of the color temperature meter CA210 through the serial port of the debugging control terminal. When the brightness is greater than the preset reference value, the debugging control terminal subtracts 1 from the register value corresponding to the backlight value 100. , and then compare the read brightness with the preset benchmark, and repeat this process until the maximum brightness of each display unit meets the preset benchmark; when the read brightness is lower than the preset benchmark, the debugging control terminal Add 1 to the register value corresponding to the backlight value 100, and then compare the read brightness with the preset benchmark, and repeat this process until the maximum brightness of each display unit meets the preset benchmark.

In step S103 , according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100 , register values corresponding to other preset backlight values are calculated.

In this embodiment, the core module of the display unit calculates the register values corresponding to the backlight value 25, the backlight value 50, and the backlight value 75 through the register value corresponding to the backlight value 100 and the register value corresponding to the backlight value 0, and saves them in their respective in the register.

Wherein, the register value corresponding to the backlight value 0 of the minimum brightness is preset, and this value is determined by the backlight parameter of the liquid crystal display unit.

The specific calculation method is:

The register value Y50=(Y0+Y100)/2 corresponding to the backlight value 50;

The register value Y25=(Y0+Y50)/2 corresponding to the backlight value 25;

The register value Y75=(Y50+Y100)/2 corresponding to the backlight value 75.

In step S104, a plurality of backlight curves are generated according to the above-mentioned backlight value and the register value corresponding to the above-mentioned backlight value.

In this embodiment, the display unit core module automatically generates the backlight curve corresponding to the backlight value between 0 and 25 according to the above backlight value and the register value corresponding to the above backlight value, and the backlight value is 25~25. The backlight curve corresponding to the backlight value between 50, the backlight curve corresponding to the backlight value between 50 and 75, and the backlight curve corresponding to the backlight value between 75 and 100.

The backlight curve between two points is determined by the following formula, although other linear functions can also be used:

A backlight curve is generated according to the linear function relationship Y=KX+A, where Y represents the backlight value, and X represents the register value corresponding to the backlight value.

Of course, according to the splicing display effect, the register values corresponding to other preset backlight values manually input are received, and then according to the backlight value 0, the backlight value 100, the register values corresponding to the backlight value 0 and the backlight value 100, and the above manual input Other preset backlight values and the register values corresponding to the above other preset backlight values generate multiple backlight curves, for example, manually adjust the register values of backlight value 25, backlight value 50 and backlight value 75, and record them in the display unit movement In the module, according to the backlight value 0, the backlight value 100, the register value corresponding to the backlight value 0 and the backlight value 100, and the backlight value 25, the backlight value 50, the backlight value 75, the backlight value 25, the backlight value 50. The register value corresponding to the backlight value 75 regenerates the backlight curve with a backlight value of 0~25, the backlight curve with a backlight value of 25~50, the backlight curve with a backlight value of 50~75, and the backlight curve with a backlight value of 75~100 curve.

In step S105, the brightness of each display unit is adjusted according to the input backlight value and the backlight curve corresponding to the backlight value.

In this embodiment, first adjust the brightness value, contrast value, and backlight value of each display unit in the LCD splicing system to 100, then monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value of 100 until each display The brightness of the units all meet the preset benchmark, so that the brightness consistency of each display unit in the LCD large-screen splicing system is guaranteed.

Embodiment two

FIG. 2 shows a specific structural block diagram of a system for adjusting the brightness of a liquid crystal splicing system provided by Embodiment 2 of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown. In this embodiment, the system for adjusting the brightness of the liquid crystal splicing system includes a display unit core module 21 and a liquid crystal splicing system 22 equipped for the display unit core module. The liquid crystal splicing system includes a plurality of display units, so The system also includes: a debugging control terminal 23 and a color temperature meter 24, the debugging control terminal 23 and the display unit core module 21 are connected through a first communication interface, the debugging control terminal 23 and the color temperature meter 24 They are connected through a second communication interface, and both the first communication interface and the second communication interface may be serial ports.

Specifically, the debugging control terminal 23 includes: a parameter value adjustment unit 231 and a register value adjustment unit 232 .

Wherein, the parameter value adjustment unit 231 is configured to adjust the brightness value, contrast value, and backlight value of each display unit in the liquid crystal splicing system to 100 through the first communication interface;

The register value adjustment unit 232 is configured to monitor the brightness of each display unit, and at the same time adjust the register value corresponding to the backlight value 100 through the first communication interface until the brightness of each display unit meets a preset benchmark, the preset The benchmark is the typical value of the maximum full-screen brightness specified in the specifications of the large-screen LCD screen.

Further, the register value adjustment unit 232 includes: a brightness reading module, a register value increasing module and a register value decreasing module.

Wherein, the brightness reading module is used to read the brightness measured from each display unit;

The register value increase module is used to subtract 1 from the register value corresponding to the backlight value 100 when the read brightness is greater than the preset reference, and then compare the read brightness with the preset reference, Repeat this process until the maximum brightness of each display unit meets the preset benchmark;

The register value reduction module is used to add 1 to the register value corresponding to the backlight value 100 when the read brightness is lower than the preset reference, and then compare the read brightness with the preset reference, This process is repeated until the maximum brightness of each display unit meets the preset benchmark.

The color temperature meter 24 includes a probe, which is used to measure the brightness of each display unit through the probe, and transmit it to the register value adjustment unit 232 of the debugging control terminal 23 through the second communication interface.

The display unit core module 21 includes: a first register value acquisition unit 211 , a backlight curve generation unit 212 and a brightness adjustment unit 213 .

Wherein, the first register value acquisition unit 211 is configured to calculate register values corresponding to other preset backlight values according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100;

A backlight curve generation unit 212, configured to generate multiple backlight curves according to the above-mentioned backlight value and the register value corresponding to the above-mentioned backlight value;

The brightness adjustment unit 213 is configured to adjust the brightness of each display unit according to the backlight value input by the debugging control terminal and the backlight curve corresponding to the backlight value.

Further, the display unit movement module 21 may further include: a second register value acquisition unit, which is used to receive register values corresponding to other preset backlight values manually input according to the splicing display effect.

The system for adjusting the brightness of the liquid crystal splicing system provided by the embodiment of the present invention can be applied in the first corresponding method embodiment above. For details, refer to the description of the first embodiment above, and will not be repeated here.

It is worth noting that in the above system embodiments, the units included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of each functional unit It is only for the convenience of distinguishing each other, and is not used to limit the protection scope of the present invention.

In addition, those of ordinary skill in the art can understand that all or part of the steps in the methods of the above-mentioned embodiments can be completed by instructing related hardware through programs, and the corresponding programs can be stored in a computer-readable storage medium. Storage media, such as ROM/RAM, magnetic disk or optical disk, etc.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (12)

1. A method for adjusting the brightness of a liquid crystal splicing system, characterized in that the method comprises: Adjust the brightness value, contrast value, and backlight value of each display unit in the LCD splicing system to 100; Monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value 100 at the same time, until the brightness of each display unit meets the preset benchmark; According to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100, calculate the register value corresponding to other preset backlight values; Generate a plurality of backlight curves according to the above backlight value and the register value corresponding to the above backlight value; The brightness of each display unit is adjusted according to the input backlight value and the backlight curve corresponding to the backlight value. 2. The method according to claim 1, wherein the monitoring the brightness of each display unit and simultaneously adjusting the register value corresponding to the backlight value 100 until the brightness of each display unit meets a preset benchmark comprises: Read the brightness measured from each display unit; When the read brightness is greater than the preset benchmark, subtract 1 from the register value corresponding to the backlight value of 100, and then compare the read brightness with the preset benchmark, and repeat this process until each display The maximum brightness of the unit complies with the preset benchmark; When the read brightness is lower than the preset benchmark, add 1 to the register value corresponding to the backlight value 100, and then compare the read brightness with the preset benchmark, and repeat this process until each display unit The maximum brightness meets the preset benchmark. 3. The method according to claim 1, wherein, before generating a plurality of backlight curves according to the backlight value and the register value corresponding to the backlight value, the method further comprises: According to the splicing display effect, the register values corresponding to other preset backlight values input manually are received. 4. The method according to claim 1, wherein the preset reference is a typical value of the maximum full-screen brightness specified in the specifications of the large-screen liquid crystal display. 5. A system for adjusting the brightness of a liquid crystal splicing system, including a display unit core module and a liquid crystal splicing system equipped for the display unit core module. The liquid crystal splicing system includes a plurality of display units, wherein the The system for adjusting the brightness of the liquid crystal splicing system further includes: a debugging control terminal and a color temperature meter, the debugging control terminal and the core module of the display unit are connected through a first communication interface, and the debugging control terminal and the color temperature meter are connected through the second communication interface; The debugging control terminal includes: A parameter value adjustment unit, configured to adjust the brightness value, contrast value, and backlight value of each display unit in the liquid crystal splicing system to 100 through the first communication interface; The register value adjustment unit is used to monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value 100 at the same time, until the brightness of each display unit meets the preset benchmark; The color temperature meter includes a probe, which is used to measure the brightness of each display unit through the probe, and transmit it to the register value adjustment unit of the debugging control terminal through the second communication interface; The display unit movement module includes: The first register value acquiring unit is configured to calculate register values corresponding to other preset backlight values according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100; A backlight curve generating unit, configured to generate multiple backlight curves according to the above-mentioned backlight value and the register value corresponding to the above-mentioned backlight value; The brightness adjustment unit is used to adjust the brightness of each display unit according to the backlight value input by the debugging control terminal and the backlight curve corresponding to the backlight value. 6. The system according to claim 5, wherein the register value adjustment unit comprises: The brightness reading module is used to read the brightness measured from each display unit; The register value increase module is used to subtract 1 from the register value corresponding to the backlight value 100 when the read brightness is greater than the preset reference, and then compare the read brightness with the preset reference, Repeat this process until the maximum brightness of each display unit meets the preset benchmark; The register value reduction module is used to add 1 to the register value corresponding to the backlight value 100 when the read brightness is lower than the preset reference, and then compare the read brightness with the preset reference, This process is repeated until the maximum brightness of each display unit meets the preset benchmark. 7. The system according to claim 5, wherein the display unit core module further comprises: The second register value acquisition unit is configured to receive register values corresponding to other preset backlight values manually input according to the splicing display effect. 8 . The system according to claim 5 , wherein the preset reference is a typical value of maximum full-screen brightness specified in the specifications of the large-screen LCD screen. 9. A debugging control terminal, characterized in that it is connected to the display unit core module through a first communication interface, and the debugging control terminal includes: A parameter value adjustment unit, configured to adjust the brightness value, contrast value, and backlight value of each display unit in the liquid crystal splicing system to 100 through the first communication interface; The register value adjustment unit is used to monitor the brightness of each display unit, and adjust the register value corresponding to the backlight value 100 at the same time until the brightness of each display unit meets the preset benchmark. 10. The debugging control terminal according to claim 9, wherein the register value adjustment unit comprises: A luminance value reading module, used to read the luminance measured from each display unit; The register value increasing module is used to subtract 1 from the register value corresponding to the backlight value 100 when the read brightness is greater than the preset reference, and then compare the read brightness with the preset reference, Repeat this process until the maximum brightness of each display unit meets the preset benchmark; The register value reduction module is used to add 1 to the register value corresponding to the backlight value 100 when the read brightness is lower than the preset reference, and then compare the read brightness with the preset reference, This process is repeated until the maximum brightness of each display unit meets the preset benchmark. 11. A display unit movement module, characterized in that the display unit movement module comprises: The first register value acquiring unit is configured to calculate register values corresponding to other preset backlight values according to the register value corresponding to the backlight value 0 and the register value corresponding to the backlight value 100; A backlight curve generating unit, configured to generate multiple backlight curves according to the above-mentioned backlight value and the register value corresponding to the above-mentioned backlight value; The brightness adjustment unit is configured to adjust the brightness of each display unit according to the input backlight value and the backlight curve corresponding to the backlight value. 12. The display unit core module according to claim 11, wherein the display unit core module further comprises: The second register value acquisition unit is configured to receive register values corresponding to other preset backlight values manually input according to the splicing display effect.

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