ENH050Q1-320 查看數據表（PDF） - White Electronic Designs => Micro Semi
零件编号
产品描述 (功能)
生产厂家
ENH050Q1-320 Datasheet PDF : 21 Pages
| |||
White Electronic Designs
Display Systems Division
ENH050Q1-320/450/600
LCD panel
Normal line
θ
Photodetector
(including luminosity factor)
ADJUSTING METHOD OF OPTIMUM COMMON
ELECTRODE DC BIAS VOLTAGE
To obtain optimum DC bias voltage of common electrode
driving signal (VCDC). Photo-electric devices are very
effective, and the accuracy is within 0.1V. (In visual
examination method, the accuracy is about 0.5V because
of the difference amoung individuals.)
To gain optimum common electrode DC bias voltage,
there is the following method which uses the photoelectric
device.
(Measurement of flicker)
Polarizing filter
DC bias voltage is adjusted so as to minimize NTSC: 60Hz
(30Hz) PAL: 50Hz (25Hz) flicker.
Frame
Backlight
(Plane source)
Brightness: Less than 5000cd/m2
Wave length: To be cut less than 400nm
Photo-electric
device
Output voltage
LCD
VCDC
Fig. A Measurement system
Oscilloscope
(X-Y recorder)
Fig. 9 Optical characteristics
Photo-electric output voltage is measured by an
oscilloscope at a system shown in Fig. A.
DC bias voltage must be adjusted so as to minimize the
NTSC:60Hz(30Hz) PAL:50Hz(25Hz) flicker with DC bias
voltage changing slowly. (Fig. B)
DC bias: Optimum
DC bias: Optimum + 1V
Fig. B Waveforms of flicker
White Electronic Designs Corp. reserves the right to change products or specifications without notice.
Original specifications created by Sharp.
August 2003
Rev. 0
21
Display Systems Division • Hillsboro, OR • (503) 690-2460 • www.wedc.com
Share Link: 