www.DataSheet4U.net
DATA SHEET
TFT COLOR LCD MODULE
NL6448AC20-06
17 cm (6.5 type), 640 × 480 pixels 262144/4096 colors, incorporated edge-light type backlight high brightness, inverter separated from module
DESCRIPTION
NL6448AC20-06 is a TFT(thin film transistor) active matrix color liquid crystal display(LCD) comprising amorphous silicon TFT attached to each signal electrode, a driving circuit and a backlight. NL6448AC20-06 has a builtin backlight. Backlight includes long-life-lamps and its lamps are replaceable. The 17cm diagonal display area contains 640 × 480 pixels and can display 4096 or 262144 colors simultaneously. NL6448AC20-06 is suitable for industrial application use, because the luminance is high, and the viewing direction is selectable by display scan select.
FEATURES
™ High luminance (200 cd/m2 Typ.: saturated value) ™ Low reflection ™ Wide viewing angle with retardation film ™ Display reverse scan function ™ 6-bit/4-bit digital RGB signals ™ Edge type backlight with long-life-lamps (Two lamp holders, inverter) ™ Variable luminance control ™ Backlight lamp holder (65LHS-3L) replaceable ™ Compatible to the mounting hole position of NL6448AC20-02 except for inverter.
APPLICATIONS
™ Measuring instruments ™ Display terminals for control system ™ New media ™ Control boards for NC machine ™ Monitor for process controller
Document No. EN0323EJ1V0DS00 (1st edition) Date Published July 1997 M Printed in Japan
www.DataSheet4U.net
©
1997
www.DataSheet4U.net
NL6448AC20- 06
STRUCTURE AND FUNCTIONS
A TFT color LCD module comprises a TFT LCD panel, LSIs for driving liquid crystal, and a backlight. The TFT LCD panel is composed of a TFT array glass substrate superimposed on a color filter glass substrate with liquid crystal filled in the narrow gap between two substrates. The backlight apparatus is located on the backside of the LCD panel. RGB (Red, Green, Blue) data signals are sent to LCD panel drivers after modulation into suitable forms for active matrix addressing through signal processor. Each of the liquid crystal cells acts as an electro-optical switch that controls the light transmission from the backlight by a signal applied to a signal electrode through the TFT switch.
BLOCK DIAGRAM
H – driver
R0 – R5 G0 – G5 B0 – B5
V – driver 480 lines
960 lines Digital signal processor Level shift
TFT LCD panel H : 640 × 3 (RGB) V : 480
CLK Hsync Vsync DE DPS LCD timing controller
960 lines
H – driver
VCC
Power supply circuit
LSIs Drivers Backlight
VDD
Inverter
BRTL BRTH GNDB
GND(SG) Frame(FG)
2
www.DataSheet4U.net
www.DataSheet4U.net
NL6448AC20-06
OUTLINE OF CHARACTERISTICS (at room temperature)
Display area Drive system Display colors Number of pixels Pixel arrangement Pixel pitch Module size Inverter size Weight Contrast ratio 132.48 (H) × 99.36 (V) mm a-Si TFT active matrix 262144 or 4096 colors 640 × 480 RGB vertical stripe 0.207 (H) × 0.207 (V) mm 178.8(H) × 126.8(V) × 11.0 Typ. (D) mm 26 (H) × 105 (V) × 9.5 Typ. (D) mm 237g (Typ.) + 17g (Typ., inverter) 150 : 1 (Typ.)
Viewing angle (more than the contrast ratio of 10:1) • Horizontal : 50° (Typ. left side, right side) • Vertical : 35° (Typ. up side), 45° (Typ. down side) Designed viewing direction • wider viewing angle with contrast ratio : up side (12 o'clock, reverse scan) : down side (6 o'clock, normal scan) • wider viewing angle without image reversal : up side (12 o'clock, normal scan) : down side (6 o'clock, reverse scan) • optimum grayscale (γ = 2.2) : perpendicular Color gamut 45% (Typ. At center, To NTSC) Response time Luminance Signal system Supply voltage Backlight Power consumption 40ms (Max.), "white" to "black" 200cd/m2 (Typ.) 6-/4-bit digital signals for each of RGB primary colors, Synchronous signals (Hsync, Vsync), Dot clock (CLK) 5.0V (Logic, LCD driving), 5.0V (Backlight) Edge light type: two fluorescent lamps (cold cathode type) 6.0W (Typ.)
www.DataSheet4U.net 3
www.DataSheet4U.net
NL6448AC20-06
SUPPLY VOLTAGE SEQUENCE
4.75 V VCC 0V t<150 ms Signal 0V Power-on Power-off VALID 0