Seiko Instruments user manual AN.No.G1216B1N000-3D0E Definition of response time

AN.No.G1216B1N000-3D0E

Note 3: Definition of contrast (C)	Note 4:	Definition of response time
	(V)	Vopr

C =	Brightness of non-selected dot (reflection) B2
	Brightness of selected dot (reflection)		B1
		Brightness for selected
		dot				1/fFRM
(%)		B2			Non-selected	Selected status			Non-selected status
		Brightness			status	(display ON)			(display OFF)
		curve for non-			Light				10%
Brightness		selected dot
							90%
(reflection)					100%
		B1		Brightness
					Dark		ton		toff
		0
		Operating		Vopr	: Operating voltage		ton	: Response time (rise)
		voltage(V)		fFRM	: Frame frequency		tof	: Response time (fall)
				Note: Measurement must be made using a transmissive LCD panel.

1.7 LC panel life time

Item	Conditions	Standard	Unit
Life time1	25°C±10°C	100,000 or more	hrs
	<65%RH

1Definition of life time: the time up to occurrence of any of the following:

žContrast reduces to 30% of the initial value.

žCurrent consumption becomes three times the initial value.

žOrientation deteriorates significantly.

žThe display malfunctions.

1.8LED backlight characteristics

(1)Absolute maximum ratings

Item	Symbol	Standard		Unit
DC forward current	IF	200*		mA
DC reverse voltage	VR		8	V
Allowable dissipation	PD		860	mW
Operating temp. range	Topr	−20	to +70	°C
Storage temp. range	Tstg	−30	to +80	°C

*Forward current reduction characteristics: The absolute maximum rating of the forward current varies depending on ambient temperature.

200

IF ( mA )

50

−20 25 70 Ta (°C)

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