CN105989810A - Manufacturing method of liquid crystal module - Google Patents

Abstract

The invention provides a method for manufacturing a liquid crystal module. The liquid crystal module includes an LED backlight module and a liquid crystal screen. The manufacturing method includes: a chromaticity measurement step, using an optical instrument to measure the chromaticity of a specified point of the liquid crystal module; a chromaticity determination step, Determine whether the measured chromaticity is within the specified range; the standard driving voltage writing step, if the chromaticity is within the specified range, then write the standard driving voltage parameters into the IC drive unit; the chromaticity adjustment step, if the chromaticity is within the specified range In addition, by changing the RGB driving voltage of the IC driving unit, the chromaticity is adjusted to a specified range; the first correction driving voltage writing step is to write the changed RGB driving voltage in the chromaticity adjustment step into the IC driving unit . According to the manufacturing method of the present invention, the parameters of the liquid crystal module can be changed while manufacturing the liquid crystal module, thereby narrowing the tolerance in mass production.

Description

Manufacturing method of liquid crystal module

technical field

The present invention relates to a method for manufacturing a liquid crystal module, in particular to a method for manufacturing a liquid crystal module capable of reducing mass production tolerances.

Background technique

In the prior art, due to the limitations of engineering controllable tolerance ranges such as the thickness of the liquid crystal panel and the amount of liquid crystal injection, as well as the limitation of the chromaticity range of LEDs used for backlighting, the chromaticity range of the overall white screen after the liquid crystal module is assembled will be relatively large. The chromaticity range tolerance of the current white screen is between ±0.03 and ±0.05, and the Gamma tolerance is ±0.3. There will be obvious differences in the white screen display and gray scale effect between the LCD modules.

In the traditional liquid crystal module color, only according to the standard products (thickness, liquid crystal volume, etc.) of each type of liquid crystal panel, combine the liquid crystal screen and LED backlight module. Then determine a writing parameter scheme of the driving voltage of the backlight panel. Although this can ensure that the standard product meets the customer's display effect requirements, the problem of display effect differences caused by related deviation factors in mass production cannot be avoided. Since there are tolerances between various liquid crystal panels, and there are also tolerances between various LED backlight modules, the combination of the two will result in a larger tolerance.

The distribution of whiteness of actual products of existing liquid crystal modules is shown in FIG. 1 , and each point in the figure represents the actual whiteness of each liquid crystal module. However, with the improvement of the specifications of liquid crystal display devices, the chromaticity range tolerance of the white screen within ±0.03˜±0.05 cannot meet the requirements.

In addition, the distribution of Gamma values of actual products of existing liquid crystal modules is shown in FIG. 2 , and the area enclosed by the curves in the figure represents the range of Gamma values. The range of Gamma value in the figure is within ±0.3. However, a Gamma value with a smaller tolerance is sought.

Contents of the invention

Therefore, the present invention was made in view of the above-mentioned problems, and an object thereof is to provide a method of manufacturing a liquid crystal module capable of reducing mass production tolerances.

A method for manufacturing a liquid crystal module according to one aspect of the present invention, the liquid crystal module includes an LED backlight module and a liquid crystal screen, it is characterized in that the manufacturing method is used to manufacture a plurality of liquid crystal modules, for each of the plurality of liquid crystal modules , the manufacturing method includes: a chromaticity measuring step, after assembling the LED backlight module and the liquid crystal screen, using an optical instrument to measure the chromaticity of a specified point of the liquid crystal module; a chromaticity judging step, judging Whether the measured chromaticity is within the first specified range; the first standard driving voltage writing step, if the measured chromaticity is within the specified range, the preset standard driving voltage corresponding to each luminance Writing parameters into the IC drive unit; a chromaticity adjustment step, if the measured chromaticity is outside the specified range, adjusting the chromaticity to within the specified range by changing the RGB driving voltage of the IC drive unit; The first modified driving voltage writing step is to write the changed RGB driving voltage in the chromaticity adjustment step into the IC driving unit.

According to the manufacturing method of the above-mentioned liquid crystal module, the parameters of the liquid crystal module can be changed while manufacturing the liquid crystal module, thereby narrowing the tolerance of the chromaticity range.

In addition, in the above-mentioned manufacturing method of the liquid crystal module, it also includes: a Gamma value measuring step, after the step of writing the first standard driving voltage or the step of writing the first corrected driving voltage, measure the Gamma value of the liquid crystal module respectively. The luminance values corresponding to the white, black and middle tone of the specified point, and calculate the Gamma value according to these luminance values; the Gamma value judging step is to judge whether the measured Gamma value is within the second specified range; the driving voltage is kept Step, if the measured Gamma value is within the second specified range, then keep the standard driving voltage in the first standard driving voltage writing step or the changed one in the first modified driving voltage writing step RGB driving voltage; Gamma value adjustment step, if the measured Gamma value is outside the second specified range, then change the luminance value corresponding to the middle tone by changing the RGB driving voltage of the IC drive unit, so that the The Gamma value is adjusted to be within the second specified range; the second corrected driving voltage writing step is to write the RGB driving voltage of the IC driving unit changed in the Gamma value adjusting step into the IC driving unit. Thereby, the tolerance of the Gamma value can also be reduced.

In addition, in the method for manufacturing a liquid crystal module according to another aspect of the present invention, the liquid crystal module includes an LED backlight module and a liquid crystal screen, and it is characterized in that the manufacturing method is used to manufacture a plurality of liquid crystal modules, and for the plurality of liquid crystal For each of the modules, the manufacturing method includes: a Gamma value measuring step, after assembling the LED backlight module and the liquid crystal screen, using an optical instrument to respectively measure the luminance values corresponding to white, black and middle tone , and calculate the Gamma value according to these luminance values; the Gamma value determination step determines whether the measured Gamma value is within the second specified range; the second standard driving voltage writing step, if the measured Gamma value is within the second specified range Within the specified range, then write the preset standard driving voltage parameters corresponding to each luminance into the IC drive unit; the Gamma value adjustment step, if the measured Gamma value is outside the second specified range, then by changing the IC Drive the RGB drive voltage of the unit to change the luminance value corresponding to the mid-tone, thereby adjusting the Gamma value to the second specified range; the second correction drive voltage writing step, the Gamma value adjustment step The changed RGB driving voltage of the IC driving unit is written into the IC driving unit. In this way, the parameters of the liquid crystal module can be changed while manufacturing the liquid crystal module, thereby narrowing the tolerance of the Gamma value.

In addition, in the above method of manufacturing a liquid crystal module, the predetermined point is a center point of the liquid crystal module. According to such a structure, a liquid crystal module can be measured easily.

In addition, in the above method of manufacturing a liquid crystal module, the chromaticity adjustment step includes: a chromaticity area determination step, which determines which area of the preset chromaticity area the measured chromaticity is located in; a driving voltage change amount determination step , according to the mapping between the region determined in the chromaticity region determination step and the first specified range, the change amount of the RGB drive voltage of the IC drive unit is set; the RGB drive voltage adjustment step is changed according to the change amount The RGB drive voltage, thereby adjusting the chromaticity. According to such a structure, the chromaticity of a liquid crystal module can be adjusted to a predetermined range simply and quickly.

The effect of the invention

By means of the above technical solution, the advantages and beneficial effects of the manufacturing method of the liquid crystal module of the present invention are as follows:

It is possible to change the parameters of the liquid crystal module while manufacturing the liquid crystal module, thus reducing the tolerance in mass production;

Ability to obtain liquid crystal modules with small chromaticity range tolerance or Gamma tolerance;

It is easy to manufacture liquid crystal modules of different specifications according to customer requirements.

Description of drawings

FIG. 1 is a graph showing the chromaticity range of a white screen of a conventional liquid crystal module.

FIG. 2 is a graph showing the range of Gamma values of a conventional liquid crystal module.

3 is a flowchart showing a method of manufacturing a liquid crystal module according to the first embodiment of the present invention.

4 is a detailed flowchart showing a chromaticity adjustment step in the method of manufacturing a liquid crystal module according to the first embodiment of the present invention.

5 is a diagram showing a chromaticity range of a white screen of a liquid crystal module manufactured by the method of manufacturing a liquid crystal module according to the first embodiment of the present invention.

6 is a graph showing the range of the Gamma value of a liquid crystal module manufactured by the method of manufacturing a liquid crystal module according to the first embodiment of the present invention.

7 is a flowchart showing a method of manufacturing a liquid crystal module according to a second embodiment of the present invention.

8 is a flowchart showing a method of manufacturing a liquid crystal module according to a third embodiment of the present invention.

detailed description

The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

Preferred embodiments of the method for manufacturing a liquid crystal module according to the present invention will be described in detail below with reference to the drawings. In addition, in the description of the drawings, the same reference numerals are attached to the same or corresponding parts, and overlapping descriptions are omitted.

<First Embodiment>

3 is a flowchart showing a method of manufacturing a liquid crystal module according to the first embodiment of the present invention. As shown in FIG. 3 , the method for manufacturing a liquid crystal module in the first embodiment is used to manufacture a plurality of liquid crystal modules, and the crystal module includes an LED backlight module and a liquid crystal panel.

The manufacturing method will be described below for each of the plurality of liquid crystal modules with reference to FIG. 3 . As shown in FIG. 3 , for a liquid crystal module assembled with an LED backlight module and a liquid crystal screen, the following steps are performed. After the start step S101, the chromaticity measurement step S102 is performed. In the chromaticity measuring step S102, after the LED backlight module and the liquid crystal screen are assembled, an optical instrument is used to measure the chromaticity of a predetermined point of the liquid crystal module. Here, as an optical instrument, for example, a commercially available colorimeter can be used. The predetermined point is generally taken as the center point of the liquid crystal module, and the chromaticity of the white screen at this point is measured. However, it is not limited thereto, and the measurement point and the chromaticity of the predetermined screen can also be appropriately set according to the specific conditions of the liquid crystal module.

Thereafter, the chromaticity determination step S103 is performed to determine whether the measured chromaticity is within the first predetermined range. The first predetermined range can be appropriately set according to the customer's request, for example, it can be set within a range of ±0.015 centered on 0.32 and 0.31.

If it is determined in the chromaticity determination step S103 that the chromaticity is within the first predetermined range, the first standard driving voltage writing step S104 is performed. That is, a preset standard driving voltage parameter corresponding to each luminance is written into the IC driving unit. Here, according to the corresponding LED backlight module and LCD screen, there will be a corresponding standard driving voltage. That is to say, it only needs to use a standard driving voltage to drive the liquid crystal module.

If it is judged in the chromaticity determination step S103 that the chromaticity is outside the first predetermined range, the chromaticity adjustment step S105 is performed, that is, the chromaticity is adjusted to be within the predetermined range by changing the RGB driving voltage of the IC driving unit. Afterwards, the first modified driving voltage writing step S106 is performed, that is, the changed RGB driving voltage in the chromaticity adjustment step S105 is written into the IC driving unit. In this way, even if the chromaticity of the liquid crystal module is not within the specified range required by the customer, the chromaticity of the liquid crystal module can meet the requirements by changing the driving voltage of the liquid crystal.

So far, the chromaticity adjustment of the liquid crystal module is completed.

Afterwards, the Gamma value measurement step S108 may also be performed. That is, after the first standard driving voltage writing step S104 or the first corrected driving voltage writing step S106, respectively measure the luminance values corresponding to the white, black and intermediate tone of the specified point of the liquid crystal module, and according to these The brightness value calculates the Gamma value. Here, the prescribed point may be a center point of the liquid crystal module.

Thereafter, the Gamma value determination step S109 is performed to determine whether the measured Gamma value is within the second predetermined range. Here, the second predetermined range may be a value set according to a customer's request. For example, the Gamma value can be set within the range of 2.2±0.2.

If the gamma value measured in the gamma value determination step S109 is within the second predetermined range, the standard driving voltage holding step S110 is performed. That is, the standard driving voltage in the first standard driving voltage writing step S104 or the changed RGB driving voltage in the first corrected driving voltage writing step S106 is maintained.

If the Gamma value measured in the Gamma value determination step S109 is outside the second predetermined range, the Gamma value adjustment step S111 is performed. That is, by changing the RGB drive voltage of the IC drive unit to change the luminance value corresponding to the mid-tone, thereby adjusting the Gamma value to the second specified range; after that, the second corrected drive voltage writing step S112 is performed , that is, the changed RGB driving voltage of the IC driving unit in the Gamma value adjusting step S111 is written into the IC driving unit.

So far, the adjustment of the Gamma value of the liquid crystal module is completed, thus ending the detection S107 of the liquid crystal module. Then enter the detection of the next liquid crystal module.

In addition, FIG. 4 is a detailed flowchart showing the chromaticity adjustment step S105 in the manufacturing method of the liquid crystal module according to the first embodiment of the present invention.

As shown in FIG. 4 , in the chromaticity adjustment step S105 , a chromaticity area determination step S1051 is first performed, which determines which area of the preset chromaticity areas the measured chromaticity is located in. For example, the chromaticity regions that may appear in the liquid crystal module are grouped in advance, and the mapping to the first predetermined range is set for each grouped chromaticity region. As a result, all possible chromaticities can be quickly mapped to the first predetermined range.

Afterwards, the driving voltage change amount determining step S1052 is performed, and the RGB driving voltage change amount of the IC driving unit is set according to the mapping between the region determined in the chromaticity region determining step S1501 and the first predetermined range.

Afterwards, the RGB driving voltage adjustment step S1503 is performed, and the RGB driving voltage is changed according to the change amount, so as to adjust the chromaticity. Thus, the chromaticity of the liquid crystal module can be quickly modified to the first specified range required by the customer, thereby reducing the tolerance range of the chromaticity of the liquid crystal module.

5 is a diagram showing a chromaticity range of a white screen of a liquid crystal module manufactured by the method of manufacturing a liquid crystal module according to the first embodiment of the present invention. 6 is a graph showing the range of the Gamma value of a liquid crystal module manufactured by the method of manufacturing a liquid crystal module according to the first embodiment of the present invention. It can be seen from FIG. 5 that the chromaticity of the liquid crystal module is controlled within the first prescribed range, thereby reducing the tolerance of the chromaticity range of the white screen to ±0.005-±0.015. In addition, as can be seen from Figure 6, the tolerance of the Gamma value is reduced to ±0.2.

According to the manufacturing method of the liquid crystal module of the first embodiment, the detection steps of the chromaticity and the Gamma value are added for each liquid crystal module, so that different driving voltages are set for each liquid crystal module, so that the chromaticity of a plurality of liquid crystal modules The tolerance and Gamma value tolerance are greatly reduced, thereby reducing the variability among multiple liquid crystal modules.

<Second embodiment>

7 is a flowchart showing a method of manufacturing a liquid crystal module according to a second embodiment of the present invention. The difference between the manufacturing method of the liquid crystal module of the second embodiment and the first embodiment is only that the steps related to gamma value detection are omitted.

That is, the manufacturing method of the liquid crystal module according to the second embodiment includes a chromaticity measuring step S102, a chromaticity judging step S103, a first standard driving voltage writing step S104, a chromaticity adjusting step S105, and a first corrected driving voltage writing step. S106. After the first standard driving voltage writing step S104 or the first corrected driving voltage writing step S106, the detection S107 of the liquid crystal module ends. Then enter the detection of the next liquid crystal module.

According to the manufacturing method of the liquid crystal module of 2nd Embodiment, the tolerance of the small chromaticity range similar to 1st Embodiment can be obtained. And it is especially preferred when the customer does not have high requirements on the tolerance range of the Gamma value.

<third embodiment>

8 is a flowchart showing a method of manufacturing a liquid crystal module according to a third embodiment of the present invention. The difference between the manufacturing method of the liquid crystal module of the third embodiment and the first embodiment is only that the steps related to chromaticity detection are omitted.

Next, the manufacturing method according to the third embodiment will be described for each of the plurality of liquid crystal modules with reference to FIG. 8 . As shown in FIG. 3 , for a liquid crystal module assembled with an LED backlight module and a liquid crystal screen, the following steps are performed. After the start step S201, the Gamma value measurement step S202 is performed. In the Gamma value measuring step S202, after the LED backlight module and the LCD screen are assembled, optical instruments are used to respectively measure the luminance values corresponding to the white, black, and middle tone of the specified points of the liquid crystal module, and according to these luminance Calculate the Gamma value from the degree value. Here, the specified point is generally taken as the center point of the liquid crystal module, and the luminance values corresponding to the white, black and middle tone of the point are measured. However, it is not limited thereto, and the measurement point and the luminance value corresponding to the predetermined tone can also be appropriately set according to the specific conditions of the liquid crystal module.

After that, the Gamma value determination step S203 is performed to determine whether the measured Gamma value is within the second predetermined range. Here, the second predetermined range may be a value set according to a customer's request. For example, the Gamma value can be set within the range of 2.2±0.2.

If the Gamma value measured in the Gamma value judging step S203 is within the second predetermined range, the second standard driving voltage writing step S204 is performed. That is, a preset standard driving voltage parameter corresponding to each luminance is written into the IC driving unit. Here, according to the corresponding LED backlight module and LCD screen, there will be a corresponding standard driving voltage. That is to say, it only needs to use a standard driving voltage to drive the liquid crystal module.

If the Gamma value measured in the Gamma value determination step S203 is outside the second predetermined range, the Gamma value adjustment step S205 is performed. That is, by changing the RGB drive voltage of the IC drive unit to change the luminance value corresponding to the mid-tone, thereby adjusting the Gamma value to the second specified range; after that, the second corrected drive voltage writing step S206 is carried out , that is, the changed RGB driving voltage of the IC driving unit in the Gamma value adjusting step S205 is written into the IC driving unit.

So far, the adjustment of the Gamma value of the liquid crystal module is completed, thus ending the detection S207 of the liquid crystal module. Then enter the detection of the next liquid crystal module.

According to the manufacturing method of the liquid crystal module of 3rd Embodiment, the tolerance of the small Gamma value similar to 1st Embodiment can be obtained. And it is especially preferred when the customer does not have high requirements on the tolerance range of the chromaticity range.

Although the present invention has been specifically described above in conjunction with the drawings and embodiments, it should be understood that the above description does not limit the present invention in any form. Those skilled in the art can make modifications and changes to the present invention as required without departing from the true spirit and scope of the present invention, and these modifications and changes all fall within the scope of the present invention. For example, the adjustment of the Gamma value in the present invention utilizes the method of changing the luminance value corresponding to the middle tone, but the method of changing the luminance value corresponding to the specified tone can also be used to adjust the Gamma value of the liquid crystal module. In addition, the chromaticity adjustment in this example adopts the method of setting the mapping between the specified chromaticity area and the target range, and the method of looking up a table or setting a conversion formula can also be used to adjust the chromaticity to the target range.

Claims (5)

1. a manufacture method for Liquid Crystal Module, described Liquid Crystal Module include LED-backlit module and Liquid crystal display screen, it is characterised in that

Described manufacture method is used for manufacturing multiple Liquid Crystal Module, for the plurality of Liquid Crystal Module Each, described manufacture method includes:

Colour measurement step, after described LED-backlit module and described liquid crystal display screen are assembled, Utilize the colourity of the point of the regulation of the optical instrument described Liquid Crystal Module of measurement；

Colourity determination step, it is determined that whether measured colourity is in the 1st prescribed limit；

1st standard driving voltages write step, if measured colourity is in described prescribed limit In, then the standard driving voltages parameter read-in IC corresponding to each briliancy set in advance is driven single Unit；

Chroma control step, if measured colourity is outside described prescribed limit, then by changing Become the RGB driving voltage of IC driver element, and by described chroma control to described prescribed limit In；

1st revises driving voltage write step, after the change in described chroma control step RGB driving voltage write IC driver element.

2. the manufacture method of Liquid Crystal Module as claimed in claim 1,

Described manufacture method also includes:

Gamma value measuring process, in described 1st standard driving voltages write step or described 1 revises after driving voltage write step, measures point white of the regulation of described Liquid Crystal Module respectively Color, black and middle brightness value corresponding to contrast, and calculate Gamma according to these brightness values Value；

Gamma value determination step, it is determined that whether measured Gamma value specifies model the 2nd In enclosing；

Driving voltage keeps step, if measured Gamma value is in described 2nd prescribed limit In, then keep the described standard driving voltages or described in the 1st standard driving voltages write step 1st revises the RGB driving voltage after the change in driving voltage write step；

Gamma value set-up procedure, if measured Gamma value specifies model the described 2nd Outside enclosing, then change middle contrast institute by changing the RGB driving voltage of IC driver element right The brightness value answered, thus described Gamma value is adjusted in described 2nd prescribed limit；

2nd revises driving voltage write step, by the change in described Gamma value set-up procedure After IC driver element RGB driving voltage write IC driver element.

3. a manufacture method for Liquid Crystal Module, described Liquid Crystal Module include LED-backlit module and Liquid crystal display screen, it is characterised in that

Described manufacture method is used for manufacturing multiple Liquid Crystal Module, for the plurality of Liquid Crystal Module Each, described manufacture method includes:

Gamma value measuring process, is assembling it by described LED-backlit module and described liquid crystal display screen After, utilize optical instrument to measure white, black and middle brightness value corresponding to contrast respectively, And calculate Gamma value according to these brightness values；

Gamma value determination step, it is determined that whether measured Gamma value specifies model the 2nd In enclosing；

2nd standard driving voltages write step, if measured Gamma value is the described 2nd In prescribed limit, then by the standard driving voltages parameter read-in corresponding to each briliancy set in advance IC driver element；

Gamma value set-up procedure, if measured Gamma value specifies model the described 2nd Outside enclosing, then change middle contrast institute by changing the RGB driving voltage of IC driver element right The brightness value answered, thus described Gamma value is adjusted in described 2nd prescribed limit；

2nd revises driving voltage write step, by the change in described Gamma value set-up procedure After IC driver element RGB driving voltage write IC driver element.

4. the manufacture method of the Liquid Crystal Module as according to any one of claims 1 to 3,

The point of described regulation is the central point of described Liquid Crystal Module.

5. the manufacture method of Liquid Crystal Module as claimed in claim 1 or 2,

Described chroma control step includes:

Chroma areas determination step, it is determined that measured colourity is positioned at chroma areas set in advance In which region；

Driving voltage knots modification determines step, according to the district judged in chroma areas determination step Territory and the mapping of described 1st prescribed limit, set the RGB driving electricity of described IC driver element The knots modification of pressure；

RGB driving voltage set-up procedure, changes described RGB and drives electricity according to described knots modification Pressure, thus adjust described colourity.