EL640.480-AM1 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EL640.480-AM1
기능 Displays
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EL640.480-AM1 데이터시트, 핀배열, 회로
Interfacing the Planar Systems
EL640.480-AF1, AG1 and AM1 Displays
Application Note 116-01
Copyright© 1996 by Planar Systems, Inc.
This document is subject to change without
notice. Planar provides this information as
reference only and does not imply any
recommendation or endorsement of other vendors’
AN116-01 December 1996.
The Definition of Quality
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EL640.480-AM1 pdf, 반도체, 판매, 대치품
When creating a cable for your specific system, the exact pin to pin connections
can get confusing due to the inconsistencies in the display business. The
following notes should help sort out which signals on the video controller should
connect to which signals on the ICEBrite displays.
CP1, or data input latch, is often referred to as LP, HS, HSYNC or LOAD.
CP2, or data input clock, is often referred to as CP, XSCL, CLOCK, DCLK,
CK, NCLK, or CLK.S, or scan start up signal, is often referred to as VS,
VDDH, VEE or VLCD, usually referred to as the power supply for LCD, is
not required for the ICEBrite EL displays. This voltage is usually -15 to - 28
V and provides the bias voltage necessary to drive the liquid crystal. The
ICEBrite displays require only +12 V and +5 V to operate so an external
negative supply is unnecessary.
DISP, DISPOFF, ENAB or ENABLE is used in LCDs to enable or disable
the display. The ICEBrite displays will be turned off by halting the control
signals, and thus this pin is not needed.
FR or DF is used to provide the AC signal required by many LCDs. ICEBrite
EL does note require this signal.
Vadj is used on some liquid crystal displays to set the operating point, or
contrast. ICEBrite EL does not require this signal since the contrast is not a
function of input voltage, viewing angle, or temperature.
Power Supplies
One of the next items that need to be addressed when integrating the ICEBrite
displays in a new system is the power supply requirements. All ICEBrite
displays have an integrated DC-DC converter to create the necessary voltages
that drive the EL display. Therefore, the only power signals required are +12 V
DC for the DC-DC converter, and +5 V DC for the digital logic. Things like
current (or power) capability, overcurrent protection, filtering and power supply
sequencing should be considered when selecting these two supplies for an
ICEBrite system.
In EL displays, the total power draw is very dependent on the pattern (text,
graphics, etc.) on the display. Typical power is lowest with all pixels off, slightly
higher with all pixels on, and a maximum when displaying a 2x2 checkerboard
pattern. Of course the important thing for display integrators is how much power
the display will draw with their patterns of text or graphics. To help system
designers estimate the impact on the power budget, Planar specifies a “typical”
power consumption which consists of filling the entire screen with Es and
measuring the power. As an example, the 10.4" display is specified at 24W
maximum and 10W typical at 120 Hz.
4 Planar Application Note 116-01
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EL640.480-AM1 전자부품, 판매, 대치품
Teknor Microsystems, Inc. provides SBC computers and PC compatible
boards based on the Chips and Technologies ICs.
Alpha Point Ltd. provides products that convert single scan panel drive to
dual scan panel drive. This product can convert normal feature connector
data to dual scan data that can drive the ICEBrite displays.
Allus Technology Corporation designs and manufactures SBC computers
with integrated flat panel support and PC compatible flat panel display
controllers. Using their personality modules, the controller board adapts to
any particular display that is attached.
Octagon Systems offers VGA interface cards that are based on the Chips
and Technologies ICs.
Ampro Computers, Inc. provides PC104 compatible embedded controller
solutions. Their product offering includes a VGA compatible interface board
that is based on the Chips and Technologies ICs.
Electrical Interfacing and Troubleshooting
Due to the many complexities present when bringing up a new system, it is
virtually impossible to explain the steps you will need to take to interface and
troubleshoot your system. This last section illustrates the basic issues that need
to be addressed on the digital timing and electrical interface.
The final step in integrating the ICEBrite family of EL displays is to check the
timing relationships from the systems video controller. The ICEBrite interface is
modeled after an STN LCD type video interface which is supported by readily
available controllers and allows the customer a low cost and flexible way of
controlling display brightness, gray-level generation and power consumption.
This interface enables high frame rates for increased display luminance, and
allows the user the option of utilizing frame averaging grayscale algorithms
present in various flat panel VGA controller ICs. See the grayscale application
note for information on implementing these algorithms with the Planar displays.
It should be noted that the ICEBrite displays have an onboard selftest function
which can be enabled by applying power to the display with the S signal static.
The self test mode displays a 1x 2 checkerboard pattern that inverts every few
seconds. The display will remain in this mode until two (2) low-to-high
transitions of the S signal are detected. The display will then enter and remain in
normal (user video driven) operation as long as power is applied. To enter self-
test mode again, the display must be reset by cycling +5 V (and +12 V with it)
Planar Application Note 116-001 %
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