IEC 61747-6-2:2011/COR1:2012

Corrigendum 1 - Liquid crystal display devices - Part 6-2: Measuring methods for liquid crystal display modules - Reflective type

Corrigendum 1 - Dispositifs d'affichage à cristaux liquides - Partie 6-2: Méthodes de mesure pour les modules d'affichage à cristaux liquides - Type réflexible

General Information

• Status: Published
• Publication Date: 26-Jan-2012
• ICS: 31.120 - Electronic display devices
• Technical Committee: TC 110 - Electronic displays
• Current Stage: PPUB - Publication issued
• Start Date: 31-Jan-2012
• Completion Date: 27-Jan-2012

Relations

• Corrects: IEC 61747-6-2:2011 - Liquid crystal display devices - Part 6-2: Measuring methods for liquid crystal display modules - Reflective type
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 61747-6-2
st
(1 edition – 2011)
Liquid crystal display devices –
Part 6-2: Measuring methods for liquid crystal display modules – Reflective type

CORRIGENDUM 1
Figures 11 and 12
Replace existing Figures 11 and 12 by the following new figures:
Front view Top view Side view
A

B

Gloss trap
Receiver slit
A
IEC  040/12
Figure 11– Hemispherical illumination with gloss-trap (GT)
opposite to receiver inclination
I I
Revolution B
Cross section A-A
1 1
0 0


–90° 0° 90° 0° 180° 360°
IEC  041/12
Figure 12a – Measured luminance as function of    Figure 12b – Measured luminance as function of 
Figure 12 – Normalized illuminance at the location of the measuring spot

5.1.3 Measuring method
Replace existing items a) to d) by the following new items, so as to include the procedure for
determining the WWS reflectance:
a) Select one of the standard measuring systems.
b) Place the WWS at the position where the DUT will be placed for subsequent
measurement and measure Rw’(
January 2012 Janvier 2012
c) Place the DUT at the correct measuring position.
d) Supply the signals to the device so that the contrast ratio is maximised to the full
WHITE conditions. Then measure the DUT at position p (the centre of the active area
of the display) to obtain tristimulus values; X , Y , Z
on on on.
e) Supply the signals to the device to the full BLACK conditions. Then measure the
reflectance R at position p to obtain tristimulus values; X , Y , Z .
0 0 off off off
f) Determine reflectance of the full WHITE; R as Y , and reflectance of the full
on on
BLACK; R as Y
off off.
5.4.3 Measuring method
Replace existing items a) to d) by the following new items, so as to include the procedure for
determining the WWS reflectance:
a) Place the WWS at the position where the DUT will be placed for subsequent
measurement and measure X , Y , Z . Use the measurement data for
wws wws wws
calibration of the LMD, or for subsequent correction of the measured data.
b) Position the DUT at position p (the centre of the active area of the display) and
supply the maximum value of the colour input-signals of the primaries R (red), G
(green) and B (blue) simultaneously to the device. Next, maximise the contrast ratio at
this value of the input primaries. Then measure the DUT to obtain tristimulus values;
X , Y , Z
on on on.
c) Place the DUT and supply the signals to the device to the full BLACK conditions. Then
measure the position p to obtain tristimulus values; X , Y , Z
0 off off off.
d) Supply the signals of any intermediate (grey) states, if required. Then for n
intermediate states measure the position p to obtain tristimulus values X . X ; Y .
0 g1 gn g1
Y ; Z .Z .
gn g1 gn
e) Finally separately supply the maximum R-data input-signal to the device, with data
input of the complimentary primaries set to minimum or zero, and measure the red
, Y , Z .
colour tristimulus values; X
R R R.
f) In the same way measure the green and blue colour tristimulus values; X , Y , Z ,
G G G
and X , Y , Z respectively.
B B B
5.5.4 Evaluation and representation
Replace Equation (22) by the following new equation:
R(ED-i) = R(std) x L-i (DUT) / L(std)  (22)

5.6.4 Evaluation and representation
Replace Equation (23) by the following new equation:
Rλ (ED-i) = Rλ (std) x Lλ-i (DUT) / Lλ (std) (23)

Replace Equation (24) by the following new equation:
R (ED-i) = R (std) x L -i (DUT) / L (std) (24)
X/Y/Z X/Y/Z X/Y/Z X/Y/Z
January 2012 Janvier 2012
CEI 61747-6-2
ère
(1 édition – 2011)
Dispositifs d'affichage à cristaux liquides
Partie 6-2: Méthodes de mesure pour les modules d'affichage à cristaux liquides –
Type réflexible
CORRIGENDUM 1
Figures 11 et 12
Remplacer les Figures 11 and 12 existantes par les nouvelles figures suivantes:
Vue de face Vue de dessus Vue latérale
A

B

Piège à brillant
Fente réceptrice
A
IEC  040/12
...