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LCD (Liquid Crystal Display) Circuits,
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LCD Circuits: # - D
E - K L - P
Q - Z
Last Updated on:
Friday, March 12, 2010 12:07 PM |
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Links to electronic circuits,
electronic schematics, designs for engineers, hobbyists, students & inventors:
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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 - 09/04/03 EDN Design Ideas /
(added 1/05) 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.... |
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Simple Active Matrix LCD Bias Supply Operates from Battery Input - 02/03/00
EDN Design Ideas / (added 11/05) Many active-matrix-LCD applications need
multiple voltages for thin-film-transistor (TFT) bias. Typically, three voltages
are necessary: 5V for the column driver; a positive voltage, such as 10V; and a
negative voltage, such -5V, for the TFT gate drive, or row driver. For handheld
electronic devices, a battery must.... |
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Simple tester checks LCDs - 10/03/02 EDN Design Ideas / (added 1/05)
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. The LCD thus saves power by a factor of approximately 1000.... |
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Small/Medium LCD Panel less than 14 inch - Intersil Application Block Diagram
(app note added 6/06) |
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Techniques for 92% Efficient LCD Illumination - AN55 Linear Technology This
publication details several LCD backlight circuits which feature 92% efficiency.
Other benefits include low voltage operation, synchronizing capability, higher
output power for color displays, and extended dimming range. Extensive coverage of
practical issues includes layout problems, multi-lamp displays.... |
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Testing LCD Backlight Inverters using the Agilent N6700 Modular Power System MPS
- Agilent Application Note (app note added 6/06) |
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Transistor Considerations for LCD Backlighting: High Efficiency DC-to-AC
Conversion - Zetec Semiconductors Applications Notes A study of the
parametric requirements of Bipolar transistors for the self-oscillating resonant
"Royer" inverter with respect to LCD backlighting, including circuit behaviour,
the voltage ratings of most relevance to ensure optimised device selection, and
compact packaging options (app note added 2/06) |
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Tricks Improve on Excel LCD Initialization - 04/11/02 EDN Design Ideas /
(added 1/05) A previous Design Idea on using Excel for LCD initialization relies
on the user for cutting and pasting from Excel into an editor (Reference 1). It
appears that it would take a minimum of six keystrokes or mouse strokes from one
character to a new character to perform this operation....... |
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Two Wire LCD Interface using PIC16cf84 - (electronic schematic / circuit added
4/02) |
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Ultra Low Power LCD Indicator - (electronic design added 6/07) |
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Ultracompact LCD Backlight Inverters - AN81 Linear Technology It has become
desirable to fashion laptop computers with large area screens, leaving little room
for the display's backlight inverter electronics. Miniaturization limitations of
high voltage magnetic transformers impose limits on achievable space reduction.
Another voltage step-up technology, piezoelectric transformers,.... |
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Using PIC16c5x Microcontrollers as LCD Drivers - Microchip Application Note
Published 26-Aug-97 (app note added 6/06) |
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White LED Driver Backlights LCD and Keypad - 11/13/03 EDN Design Ideas /
(added 1/05) Designers widely use white LEDs to backlight color LCDs and keypads
in handheld devices, such as cell phones, MP3 players, GPS navigators, and PDAs.
Their spectrum and brightness represent near-ideal light sources. One possible
configuration for a phone or a phone/PDA combination is to have a group of three
LEDs .... |
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LCD Circuits: # - D
E - K L - P
Q - Z |
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