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LCD (Liquid Crystal Display) Circuits,
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LCD Circuits: # - C
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Last Updated on:
Monday, October 03, 2011 06:08 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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New CCFL Power Supply Expands Automotive Applications for Back Lit Liquid
Crystal Displays - MicroNote 1402 from Microsem.....[App Note]
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Nokia 3310 LCD & PIC12F629 Thermometer - English version link
(electronic design idea added 09/08) |
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Nokia 7650 LCD Controller - Despite nobody seems to own the
appropriate documentation, it is possible to use the big cheap color LCD
displays of the Nokia series 60 cell phones for home brew projects. I
don't even have the docs and it was a rough and painful way, but now it
works.….(Circuit design added 06/09) |
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PIC LCD & Keypad Driver - (circuit / schematic design added
6/06) |
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Pot Adjusts LCD's Contrast - 02/04/99 EDN-Design Ideas.....
You can use a digitally controlled potentiometer for many purposes. In
this example, you can use the device to regulate the contrast of a
standard (such as two lines by 40 characters]LCD. You can use the circuit
in Figure 1 in a portable test system, in which t.....File contains
several circuits, please scroll down for this one..... [Design Idea by Jef
Collin, CSE Systems, Turnhout, Belgium] |
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Potentiometer Controls LCD Bias - 03/17/94 EDN-Design Ideas.....Designers of
pen-based computers can easily relegate some controls that were previously mechanical,
such as switches and potentiometers, to on-screen icons. For example, the circuit in
Fig 1 shows one way that digital logic can control the -24V-dc LCD bias using two
general-purpose I/O command lines. The DS-1669 from Dallas Semiconductor..... [Design
Idea by Michael Cortopassi, Dauphin Technology, Lombard, IL] |
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Precision Wideband Current Probe for LCD Backlight Measurement - DN101
Design Notes (Linear Technology) (app note added 6/06) |
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Processor's PWM output controls LCD/LED driver - 27-May-04 Issue of EDN
The PWM (pulse-width-modulation] output available from many microprocessors is based
on an internal 8- or 16-bit counter and features a programmable duty cycle. It is
suitable for adjusting the output of an LCD driver (Figure 1], a negative-voltage LCD
driver (Figure 2], or a current-controlled LED driver (Figure 3]..... [Design Idea by
Joe Neubauer, Maxim Integrated Products, Sunnyvale, CA] |
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Quad Output Switching Converter Provides Power for Large TFT LCD Panels -
DN349 Design Notes (Linear Technology).....[App Note] |
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Rolled-Off Noise Source - This is a circuit that generates white noise,
rolled-off to drive earphones or a small speaker. White noise creates is a "rushing"
sound, which sounds something like air rushing by your ear(s). White noise would be
flat with frequency,(circuit added 6/07) |
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Serial Interface & bias supply for Seiko-Epson G1216B dot graphics display -
(circuit schematic added 6/07) |
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Serial Interface for Truly MTC-C162DPLY-2N, 2 line X 16 char LCD display -
(schematic / circuit added 6/07) |
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Serial LCD Controller - Serial LCD/VFD Controller is a HD44870 based LCD/VFD
controller via RS-232. The control command is compatible with Matrix-Orbital's LCD
module. So, you can use any MO friendly software to control this baby such as LCDC.
….(design added 11/08) |
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Serial LCD for microControllers using only 3 pins - Connect an LCD to your
microcontroller to make it easy to develop and debug your application. You can choose
which PIC I/O pins you want to use for the interface, and any HD44780 compatible LCD
can be controlled…..(design added 05/09) [Peter Jakab, Electrical Engineer, Engineer
of Informatics] |
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Series Connected Voltage Boost Circuit for a Battery Operated LED Lantern -
A circuit that goes in series with a white LED and a 1.5 volt cell to make > 3 Volts
to drive a white LED.....(schematic / circuit added 6/07) |
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Seven-segment LCD uses two-wire interface - 4-Sep-03 Issue of EDN You
can connect seven-segment LCDs using only a two-wire interface (Figure 1]. The
two-wire interface may be at the field-effect, direct-drive LCD or at a serial
interface (such as I2C] that uses an eight-pin microcontroller. The design in Figure 1
uses an Atmel (www.atmel.com] ATtiny12 microcontroller, IC1..... [Design Idea by Hans
Krobath, EEC, Nesconset, NY] |
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Simple Active-Matrix LCD Bias Supply Operates from Battery Input - 02/03/00
EDN-Design Ideas.....Many active-matrix-LCD applications need multiple voltages for
thin-film-transistor (TFT]bias. Typically, three voltages are necessary 5V for
column driver; a positive voltage, such as 10V; and a negative voltage, such -5V, for
TFT gate drive, or row driver. For handheld electronic devices, a battery must.....
[Design Idea by Michael Shrivathson, National Semiconductor Corp, Santa Clara, CA] |
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Simple tester checks LCDs - 3-Oct-02 Issue of EDN Manufacturers of
electronic equipment use LCDs for calculators, watches, mini-videogames, and pagers,
for example. In comparison with LED-based displays, which consume power on the order
of tens of milliwatts, an LCD consumes only a few microwatts. [Design Idea by D
Prabakaran, NL Polytechnic College, Tamil Nadu, India] |
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Single IC Biases LCD and GaAsFET Amplifier - 04/09/98 EDN-Design
Ideas.....Operating from a lithium-ion cell or a four-cell NiCd battery, the circuit
in Figure 1 provides �6V bias for LCDs and a separate, quiet negative bias for a
GaAsFET power amplifier. This bias combination exists in cell
phones,.....contains several circuits, scroll to this one..... [Design Idea by John
Wettroth, Maxim Integrated Products, Apex, NC] |
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Small/Medium LCD Panel less than 14 inch - Intersil Application Block
Diagram.....[App Note] |
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LCD Circuits:
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