CN1955797A - Manufacturing method of liquid crystal display - Google Patents

Abstract

A method for preparing liquid crystal display includes calculating out color difference of back light panel to be matched to LCD to be matched, pairing back light plate with LCD in the same color difference grade as that of back light panel, sticking paired back light panel with paired LCD. By applying said method, color cast of back light panel to LCD is greatly made up since both back light panel and LCD are in the same color difference grade.

Description

A kind of manufacture method of LCD

[technical field]

The invention relates to a kind of manufacture method of LCD.

[background technology]

In the existing LCD manufacture process, generally be that backlight and the chromatic liquid crystal screen (being LCD) that will be provided by supplier sticks together, but because the manufacture level difference of each manufacturer is difficult to the display effect that reaches desirable.Backlight is easy to generate slightly inclined to one side indigo plant or yellow partially, and it is desirable white bright and have in various degree colour cast that LCD also is difficult to reach, and like this, can make the bigger colour cast of display module generation after the assembling.

[summary of the invention]

The object of the present invention is to provide a kind of manufacture method that can improve the display effect of LCD.

The object of the present invention is achieved like this: the manufacture method of this LCD comprises the steps:

A) calculate step, calculate the aberration Δ E of backlight to be matched and LCD _Ab

B) coupling step will be in backlight in the same aberration grade and LCD pairing;

C) applying step is with the backlight and the LCD applying of pairing.

Described step a) comprises the steps:

A1) L of the white bright backlight of measurement standard ₁₀, a ₁₀, b ₁₀L with standard LCD ₂₀, a ₂₀, b ₂₀

A2) measure the L of backlight to be matched ₁₁, a ₁₁, b ₁₁L with LCD to be matched ₂₁, a ₂₁, b ₂₁

A3), calculate the aberration Δ E of each backlight to be matched and LCD respectively according to the data of measuring _Ab

Described step a) and b) between also comprise following determining step: judge whether backlight colourity a, b value right coordinate points and LCD a, b value right coordinate points about former point symmetry, if any then directly entering step c), as then not entering step b).

Described aberration grade comprises five ranks, and the scope of other value of chromatism of each grade is respectively: 0～2, more than 2～5,5～10,10～20 and 20.

Compared with prior art, the present invention has following advantage: by with backlight in the same aberration grade and LCD pairing, remedied the colour cast of backlight and LCD, made the arranging effect that reaches desirable between the two, thereby improved the display effect of LCD.

[description of drawings]

Fig. 1 is a process flow diagram of the present invention.

Fig. 2 is Descartes's rectangular coordinate system of expression color space.

Fig. 3 is the plane right-angle coordinate of expression colourity.

[embodiment]

See also Fig. 1, the manufacture method of a kind of LCD of the present invention is by measuring the aberration of backlight and LCD respectively, and seeks the backlight and the LCD of pairing mutually in same aberration allowed band, and the backlight that will match and LCD stick together.The manufacture method of this LCD comprises measuring and calculating step a), coupling step b) and applying step c).This measuring and calculating step a) comprises the steps: a1) L of the white bright backlight of measurement standard ₁₀, a ₁₀, b ₁₀L with standard LCD ₂₀, a ₂₀, b ₂₀A2) measure the L of backlight to be matched ₁₁, a ₁₁, b ₁₁L with LCD to be matched ₂₁, a ₂₁, b ₂₁A3), calculate the aberration Δ E of each backlight to be matched and LCD respectively according to the data of measuring _AbThe coupling step b) is as follows: as measure a of a backlight to be matched ₁₁, b ₁₁A with a LCD to be matched ₂₁, b ₂₁Right coordinate points about former point symmetry, then with this backlight and LCD pairing and enter the applying step c); Otherwise, will be in backlight and the LCD pairing in the same aberration allowed band and enter step c).Step c) is as follows: the backlight and the LCD of pairing are sticked together.

See also Fig. 2, among the present invention, described L represents psychological lightness, a and b all represent psychometric chroma, this L, a, b represent the coordinate axis of Descartes's rectangular coordinate system of an expression color space respectively, and this color space is that CIE1976LAB (or Lab) system was recommended in 1976, in this color space, the geometric distance that equates on diverse location, different directions visually has corresponding aberration, the tolerance of the space length of easily surveying as the color perception difference.In this rectangular coordinate system ,+a represents inclined to one side redness, and-a represents inclined to one side green, and+b represents inclined to one side yellow, and-b represents inclined to one side blueness, and the lightness of color is represented by the percentage of L.See also Fig. 3, a and b are the coordinate axis of the plane right-angle coordinate of expression colourity, and this a, b axle are divided into four quadrants with this coordinate system, and promptly chromatic value a, the b of each backlight or LCD constitute the coordinate points (a, b) in this coordinate system.

Described same aberration allowed band is to judge according to aberration division table, and this aberration division table is divided into five grades with value of chromatism, and described same aberration allowed band is and is in same aberration grade.This aberration is divided table as table one, and in the table one, value of chromatism is as the main foundation of backlight and LCD pairing, and chromatic value and luminosity equation are as a reference.

Table one: aberration is divided table

Rank	Value of chromatism Δ E ab	Luminosity equation Δ L	Colourity a, b	Sensation aberration degree
					1	0～2	0＜|ΔL|＜2	0＜|a|＜2 0＜|b|＜2	(small aberration) feels atomic

2	2～5	2＜|ΔL|＜5	2＜|a|＜5 2＜|b|＜5	(slight aberration) sensation is slight
					3	5～10	5＜|ΔL|＜10	5＜|a|＜10 5＜|b|＜10	(less aberration) sensation obviously
4	10～20	10＜|ΔL|＜20	10＜|a|＜20 10＜|b|＜20	(big aberration) sensation clearly
					5	More than 20	|ΔL|＞20	|a|＞2 |b|＞2	(big aberration) sensation is strong

In this table one, Δ L represents luminosity equation, Δ E _AbThe expression aberration, this aberration Δ E _AbThe set of the equidistant point between expression test luminous point and the benchmark luminous point is promptly with the sphere of the distance between test point and the reference point as radius.This aberration Δ E _AbComputing method as follows:

Luminosity equation: Δ L=L1-L2,

Colour difference: Δ a=a1-a2

Δb＝b1-b2

Aberration: $\mathrm{\Δ}{E}_{\mathrm{ab}}=\sqrt{{\left(\mathrm{\ΔL}\right)}^2+{\left(\mathrm{\Δa}\right)}^2+{\left(\mathrm{\Δb}\right)}^2}$

Among the present invention,, calculate the aberration Δ E of each backlight and LCD again by measuring brightness value and the chromatic value that obtains backlight to be matched and LCD respectively _Ab, promptly obtaining one, to be equivalent to radius be Δ E _AbHollow ball, according to geometrical principle, the color relations on the diameter of this hollow ball approximate regard linear relationship as, like this, can determine the backlight of arranging in pairs or groups with it by the coordinate figure (a, b) of LCD colourity, promptly have and the backlight of this coordinate (a, b) about the chromatic value of former point symmetry according to preferential selection of this coordinate figure (a, b), the foundation of this selection is that the backlight of this pairing and the colourity of LCD have good complementarity.

Now how to make in conjunction with a concrete embodiment explanation.

As lighting source, each supplemental characteristic that records the standard backlight is with standard sources D65:

L ₁₀＝75.52 a ₁₀＝0.051 b ₁₀＝-0.126

Equally, light LCD with this standard backlight, each supplemental characteristic that records BLG+LCD is:

L ₂₀＝20.36 a ₂₀＝-0.003 b ₂₀＝0.031

Use described standard sources as lighting source now again, each supplemental characteristic of measuring backlight to be measured is:

1#：L ₁₁＝74.23 a ₁₁＝-1.101 b ₁₁＝1.024

2#：L ₁₂＝75.86 a ₁₂＝1.263 b ₁₂＝0.812

3#：L ₁₃＝76.66 a ₁₃＝3.931 b ₁₃＝-2.374

Each supplemental characteristic of measuring LCD to be measured is: ...

1#：L ₂₁＝18.53 a ₂₁＝1.013 b ₂₁＝-1.597

2#：L ₂₂＝20.69 a ₂₂＝-0.524 b ₂₂＝-1.034

3#：L ₂₃＝19.03 a ₂₃＝-2.078 b ₂₃＝3.176

By resulting data, because the colourity (a, b) of the colourity (a, b) that does not have a backlight and LCD is about the true origin symmetry of (as shown in Figure 3) in the chromatic diagram, so need directly judgement aberration Δ E _Ab, can draw:

For backlight to be measured: Δ E _Ab11=2.08 Δ E _Ab12=1.57 Δ E _Ab12=4.63......

For LCD to be measured: Δ E _Ab21=3.35 Δ E _Ab22=1.23 Δ E _Ab23=3.99......

According to the aberration that calculates gained, can know: 1# backlight and 1#LCD are all in the scope of the rank 2 of aberration grade, so just in time match; 2# backlight and 2#LCD are all in the scope of the rank 1 of aberration grade, so just in time pairing; 3# backlight and 3#LCD are all in the scope of the rank 2 of aberration grade, so just in time pairing.

Claims (4)

1. the manufacture method of a LCD is characterized in that: comprise the steps:

A) calculate step, calculate the aberration Δ E of backlight to be matched and LCD _Ab

B) coupling step will be in backlight in the same aberration grade and LCD pairing;

C) applying step is with the backlight and the LCD applying of pairing.

2. the manufacture method of a kind of LCD as claimed in claim 1, it is characterized in that: described step a) comprises the steps:

A1) L of the white bright backlight of measurement standard ₁₀, a ₁₀, b ₁₀L with standard LCD ₂₀, a ₂₀, b ₂₀

A2) measure the L of backlight to be matched ₁₁, a ₁₁, b ₁₁L with LCD to be matched ₂₁, a ₂₁, b ₂₁

A3), calculate the aberration Δ E of each backlight to be matched and LCD respectively according to the data of measuring _Ab

3. the manufacture method of a kind of LCD as claimed in claim 2, it is characterized in that: described step a) and b) between also comprise following determining step: judge whether backlight colourity a, b value right coordinate points and LCD a, b value right coordinate points about former point symmetry, if any then directly entering step c), as then not entering step b).

4. as the manufacture method of any described a kind of LCD among the claim 1-3, it is characterized in that: described aberration grade comprises five ranks, and the scope of other value of chromatism of each grade is respectively: 0～2, more than 2～5,5～10,10～20 and 20.

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