CN109084897B - LCM color coordinate calculation method based on LED color block searching - Google Patents

Abstract

The invention discloses a method for calculating a central value of a color coordinate of an LED lamp, which comprises the following steps: (1) LCM color coordinates and LED color coordinates; (2) determining the difference value of color coordinates of the BL and the LCD; (3) preliminarily determining the LED color blocks; (4) calculating an LCM color coordinate area; (5) calculating the limit value range of the LCM color coordinate, belonging to the technical field related to the calculation method of the center value of the color coordinate of the LED lamp. The purpose is that the calculation of whole color coordinate central value and the lamp of looking for suitable colour gamut are convenient, have simplified the complexity of transferring the lamp in the production process, have evaded because the color coordinate uses various problems that the mistake leads to, have provided powerful technical support for the development of backlight unit trade.

Description

LCM color coordinate calculation method based on LED color block searching

Technical Field

The invention relates to the technical field of LED lamp color coordinates in the display module industry, in particular to a method for calculating LCM color coordinates based on LED color block searching.

Background

In the prior art, the color coordinate of an LED lamp is one of important contents of colorimetry, and the measurement of the color coordinate of a light source is one of important methods for researching the characteristics of the light source, so that the method has wide use significance. The basic principle of color coordinate measurement is calculated from the basic specification of color coordinates according to the spectral distribution of the light source, and the color coordinate measurement is relatively independent from the products, and lacks the connection among the products and how to implement effective management and control.

Through market research, the existing color coordinates are called only under specific conditions in practical application and are not commonly used; the color coordinates are generally only related to the field with stronger specialty, and meanwhile, the color coordinates are more needed in the display module industry, but are generally provided by suppliers, and the provided color coordinates are only in the aspect of monomers, so that the requirement on the color coordinates of the whole module product cannot be met.

Disclosure of Invention

The invention aims to provide a method for calculating and controlling the color coordinate center value of an LED lamp and aims to search the theoretical calculation and control capability of the color coordinate of an integral module product, conveniently calculate the center value of the integral color coordinate and search lamps with proper color gamut, simplify the complexity of lamp adjustment in the production process and improve the production efficiency.

A method for calculating LCM color coordinates based on LED color patch finding, the method comprising:

(1) LCM color coordinate and LED color coordinate, the LCM color coordinate mainly depends on the difference value caused by the LED color coordinate, BL and LCD, the concrete relation is as formula one:

XLCM＝XLED+ΔXBL+ΔXLCD

YLCM＝YLED+ΔYBL+ΔYLCD

determining specific LED color coordinates according to specific XLCM and YLCM color coordinate values, wherein the difference value of BL and LCD color coordinates must be determined;

(2) determining the difference value of color coordinates of the BL and the LCD;

measuring LEDs of the existing color blocks, assembling the LEDs into BL and LCM color coordinates, calculating the difference value of the BL and LCD color coordinates, and sorting the color coordinates into corresponding tables;

(3) preliminarily determining the LED color blocks;

according to the needs of specific situations, taking the average values of delta XBL and delta YBL and delta XLCD and delta YLCD of the table arranged in the step (2), calculating the color coordinates of the LED according to the formula I in the step (1), and determining a preliminarily determined color block;

(4) calculating an LCM color coordinate area;

selecting an LED color coordinate area according to the color block obtained in the step (3), correspondingly taking the average values of delta XBL and delta YBL and delta XLCD and delta YLCD, and calculating the LCM color coordinate value range according to the formula I in the step (1);

(5) calculating an LCM color coordinate range by considering the limit values of delta XBL, delta YBL, delta XLCD and delta YLCD, and taking the limit values of delta XBL, delta YBL, delta XLCD and delta YLCD according to the table obtained in the step (2); and calculating LCM color coordinate limit value range by using the limit values of delta XBL and delta YBL, delta XLCD and delta YLCD at the LED limit coordinate point.

The beneficial effect of adopting above-mentioned technical scheme is: the method for calculating the color coordinate center value of the LED lamp is convenient for calculating the color coordinate center value of the whole body and searching for the lamp with a proper color gamut, simplifies the complexity of lamp adjustment in the production process, avoids various problems caused by wrong use of the color coordinate, and provides powerful technical support for the development of the backlight module industry.

Drawings

FIG. 1 is a first diagram illustrating a calculation method according to the present invention;

FIG. 2 is a second schematic diagram of the calculation method of the present invention;

FIG. 3 is a third schematic diagram of the calculation method of the present invention;

FIG. 4 is a fourth schematic diagram of the calculation method of the present invention;

Detailed Description

The invention will be further described with reference to the accompanying drawings and preferred embodiments thereof. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention.

Referring to fig. 1 to 4, a method for calculating LCM color coordinates based on LED color patch finding, the method comprising:

1. relationship between LCM color coordinates and LED color coordinates

The LCM color coordinate mainly depends on the difference value caused by the LED color coordinate, the BL and the LCD, and the specific relationship is as follows:

XLCM＝XLED+ΔXBL+ΔXLCD

YLCM ═ YLED + Δ YBL + Δ YLCD equation one

The difference between color coordinates of BL and LCD must be determined to determine the specific LED according to the color coordinate values of XLCM and YLCM requested by the customer.

Z190(KD050M1-31TA-A3) project, customer requires LCM color coordinates:

XLCM＝0.30±0.02

YLCM＝0.32±0.02

2. BL and LCD color coordinate difference determination

The LEDs of the existing W2 color block were measured and assembled into BL, LCM color coordinates, organized in the following table. The LED color coordinates are the average of 10 data, and the BL and LCM are the center point values.

Wherein the average value of delta XBL, delta YBL, delta XLCD and delta YLCD is 5pcs as follows:

ΔXBL＝0.00202 ΔYBL＝0.0157

ΔXLCD＝0.0236 ΔYLCD＝0.0572

table one:

3. LED color block preliminary determination

According to the client requirement:

XLCM＝0.30±0.02

YLCM＝0.32±0.02

and (3) calculating the color coordinates of the LED according to a formula I by taking the average values of delta XBL, delta YBL, delta XLCD and delta YLCD:

XLED＝0.2744

YLED＝0.2471

the coordinate point falls within the F3 color space, and the item initially selects the F3 color space.

4. Theoretical calculation of LCM color coordinate area

F3 color block LED color coordinate area:

and a point: XLED 0.2679 YLED 0.2389;

b, point: XLED 0.2728 YLED 0.2358;

and c, point: XLED 0.2799 YLED 0.2482;

and d, point: XLED 0.2749 YLED 0.2513;

and (3) calculating the LCM color coordinate value range according to a formula I by taking the average values of delta XBL, delta YBL, delta XLCD and delta YLCD:

and a point: XLCM 0.29352 ymcm 0.3118;

b, point: XLCM 0.29842 ymcm 0.3087;

and c, point: XLCM 0.30552 ymcm 0.3211;

and d, point: XLCM 0.30052 ymcm 0.3242;

from the chart, the LCM color coordinate of the F3 color block is adopted at the client

Within specification, such as red region.

5. Calculating LCM color coordinate ranges taking into account Δ XBL and Δ YBL and Δ XLCD and Δ YLCD extremes

According to table one, take Δ XBL and Δ YBL and Δ XLCD and Δ ylocd limit values:

ΔXBL min＝0.0016 ΔYBL min＝0.0149；

ΔXBL max＝0.0023 ΔYBL max＝0.0169；

ΔXLCD min＝0.0182 ΔYLCD min＝0.0455

ΔXLCD max＝0.0274 ΔYLCD max＝0.0655

at the limit coordinate point of the LED, using delta XBL, delta YBL, delta XLCD and delta YLCD

Limit value, theoretical calculation LCM color coordinate limit value range:

and (B) point A: XLCM ═ Δ XBL min + Δ XLCD min +0.2679 ═ 0.2877

YLCM＝ΔYBL min+ΔYLCD min+0.2389＝0.2993

And B, point: XLCM ═ Δ XBL max + Δ XLCD max +0.2728 ═ 0.3025

YLCM＝ΔYBL min+ΔYLCD min+0.2358＝0.2962

And C, point: XLCM ═ Δ XBL max + Δ XLCD max +0.2799 ═ 0.3096

YLCM＝ΔYBL max+ΔYLCD max+0.2482＝0.3306

And D, point: XLCM ═ Δ XBL min + Δ XLCD min +0.2749 ═ 0.2947

YLCM＝ΔYBL max+ΔYLCD max+0.2513＝0.3337

6. LCM test verification of assembly with F3 color block LED

The 5pcs finished test color coordinates were assembled, taking the center point value, as shown in the table below.

Table two:

	1	2	3	4	5
						x	0.298	0.3024	0.3006	0.3028	0.3033
y	0.3181	0.326	0.3229	0.3254	0.3261

the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (1)

1. A method for calculating LCM color coordinates based on LED color block searching is characterized in that: the method comprises the following steps:

(1) determining the relation between the LCM color coordinate and the LED color coordinate, wherein the LCM color coordinate mainly depends on the difference value caused by the LED color coordinate, the BL and the LCD, and the specific relation is as the formula I:

XLCM＝XLED+ΔXBL+ΔXLCD

YLCM＝YLED+ΔYBL+ΔYLCD

determining specific LED color coordinates according to specific XLCM and YLCM color coordinate values, wherein the difference value of BL and LCD color coordinates must be determined;

(2) determining the difference value of color coordinates of the BL and the LCD;

measuring the LED of the existing color block and the color coordinates assembled into BL and LCM, calculating the difference value of the color coordinates of BL and LCD, and arranging the color coordinates of the LED, BL and LCM and the difference value of the color coordinates of BL and LCD into a corresponding table;

(3) preliminarily determining the LED color blocks;

according to the needs of specific situations, taking the average values of delta XBL and delta YBL and delta XLCD and delta YLCD of the table arranged in the step (2), calculating the color coordinates of the LED according to the formula I in the step (1), and determining a preliminarily determined color block;

(4) calculating an LCM color coordinate area;

selecting an LED color coordinate area according to the color block obtained in the step (3), correspondingly taking the average values of delta XBL and delta YBL and delta XLCD and delta YLCD, and calculating the LCM color coordinate value range according to the formula I in the step (1);

(5) calculating an LCM color coordinate range by considering the limit values of delta XBL, delta YBL, delta XLCD and delta YLCD, and taking the limit values of delta XBL, delta YBL, delta XLCD and delta YLCD according to the table obtained in the step (2); and calculating LCM color coordinate limit value range by using the limit values of delta XBL and delta YBL, delta XLCD and delta YLCD at the LED limit coordinate point.

Images