Osram ORBEOS Components Manual do Utilizador descarregar pdf (Página 11)

BINNING

OSRAM has established a ﬁ ner resolution classiﬁ cation and

has divided the ANSI-NEMA color boxes into smaller sub-bins

(so called “ﬁ ne-bins”). In order to cover the full production

output, a row of sub-bins of similar size have been introduced

above and below the ANSI-NEMA boxes. The scheme is

shown in ﬁ gure 9.

In this binning scheme, the size of one ﬁ ne-bin box roughly

corresponds to a three-step MacAdam ellipse. According

to MacAdam, a one-step ellipse in the CIE 1931 diagram

represents an area where a homogeneous color impression

is perceived (MacAdam, D. L., Visual sensitivities to color dif-

ferences in daylight, J. Opt. Soc. Am., 32, 247 (1942)) and

where color differences are just noticeable to human observers.

The nomenclature of the ﬁ ne-bins is set up as follows. The

resulting grid pattern is created by rows – enumerated from

4 to 8 (and 9, respectively) towards the top – and by columns

assigned from left to right with characters ranging from C to

X. The ﬁ ne-bin is addressed via a combination of row num-

ber and column character. The example in ﬁ gure 9 highlights

the bin 7H. The chromaticity coordinates of the ﬁ ne-bins are

given in the appendix.

Since it is impossible to produce only one selected bin, an order

has to combine several ﬁ ne-bins. The more parts are needed,

the more ﬁ ne-bins have to be selected in order to ensure se-

curity of supply. Individual selections can be agreed upon in

close cooperation with each customer.

Fig. 9. OSRAM Opto Semiconductors’ ﬁ ne binning scheme of white color.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 19 20

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Osram ORBEOS Components Manual do Utilizador Página 11