LMR4769EW-WCB DENSITRON, LMR4769EW-WCB Datasheet - Page 74

• Manufacturer Part Number: LMR4769EW-WCB
• Description: LCD MODULE, 240X320, BLUE
• Manufacturer: DENSITRON

Specifications of LMR4769EW-WCB

• Lcd Display Type: STN
• Pixel Size (h X W): 0.34mm X 0.34mm
• Display Mode: Transflective
• Interface Type: Serial
• Viewing Area (h X W): 92.14mm X 120.14mm
• Supply Voltage: 32V
• External Depth: 15.6mm
• External: RoHS Compliant
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Backlighting Colour: Blue
• Pixel Pitch (h X W): 0.36mm X 0.36mm

S1D13700 Technical Manual
Scroll
DISP ON/OFF
OVLAY
(2) Halftone display
(3) Area flashing
SAD1
The S1D13700 uses the DISP ON/OFF command’s FP parameter to produce halftone display. This is
accomplished by flashing the screen at 15 Hz. However, because this method of display may cause display
to flicker, characteristics of the LCD module used must be carefully considered.
1 Menu pad display
2 Graph display
When displaying various data in the form of a graph for comparison purposes, this method of display is
very effective because two types of diagrams distinguishable by differences in contrast can be displayed.
1 For flashing a few characters
2 For flashing a large area
A B
[OR’ing by the layered function]
[OR’ing by the layered function]
Because the S1D13700 has a high-speed interface circuit, alternately rewriting the character and blank
codes from the MPU to flash characters is an appropriate method. In this case, the MPU rewrites
display data at intervals of 0.5 to 1.0 second as regulated by its internal timer.
Divide the first or second layer into halves with only the area required made to flash at 2 Hz, and
overlay the halved layer blocks by OR’ing.
First layer
OVLAY
DISP ON/OFF
OVLAY
DISP ON/OFF
P1 = 00H
P1 = 34H
P1 = 00H
P1 = 34H
A B
SAD2
X Y Z
Disable flashing of the first layer and enable flashing of the second
layer at 17 Hz, then overlay the first and second layers by OR’ing.
Disable flashing of the first layer and enable flashing of the second
layer at 15 Hz, then overlay the first and second layers by OR’ing.
Second layer
EPSON
A B
A B
A B
X Y Z
4: FUNCTION DESCRIPTION
Screen
Halftone
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