 News Release
12/03
ROHM Develops
DDR I and II-compatible Power IC |
ROHM CO., LTD. has developed a termination
regulator IC (BD3531F / BD3532F) with outstanding high-speed
transient response and output voltage precision designed
to be the main memory for personal computers.
As personal computers continue to get faster,
the main memory needs to get faster to keep up with the accelerated
CPU processing speeds, and DDR-SDRAM has taken the place
of SDRAM to become the norm thanks to its capacity to read
and write data at very fast speeds. That is why ROHM has
developed a termination regulator IC that delivers a reliable
high-speed data transfer compatible with this kind of high-speed
memory.
To speed up the transfer rate, the data transfer
between DDR-SDRAM and the CPU involves converting the amplitude
of the data from 2.5V to 1.25V using partial resistance (the
SSTL circuit). The power is supplied by the termination regulator
IC. As it is being transferred, the data undergoes extreme
current fluctuation (in sending and receiving) between the
high and low signals when they are in excess. If the voltage
precision and the drive current orientation selection (transient
response characteristics) are inadequate, there is insufficient
area (amplitude) to determine whether the transfer data is
high or low, and this can lead to rare instances of the wrong
data being written to the DDR-SDRAM or an error.
The BD3531F / BD3532F, however, supplies sufficient
current capacity (3A with the BD3532F and 1.5A with the BD3531F)
to the MOSFET of the regulator output and raises the drive
capacity of the termination regulator IC thanks to circuit
technology. This makes high-speed transient response characteristics
possible.
The termination voltage
precision (VTT) has also been reduced to VREF ±30mV
(about 1/3 of previous ICs), which ensures enough area
to determine whether a signal
is high or low and makes data transfer more reliable.
Also, the MOSFET output driver has been made
with low ON resistance (200m ??typ), and the IC is compatible
not only with DDR I, but also DDR II, the next-generation
DDR-SDRAM standard.
Other features include:
a built-in high-precision reference voltage circuit (VREF);
a low-input error prevention
circuit, a heat protector circuit, and a built-in enable
function; and it’s ideal for notebook computers thanks
to the SOP8 compact package
As the top maker of power ICs in the industry,
ROHM offers a high-quality, high-reliability line-up of power
ICs not only for computers, but also for AV devices, cellular
phones, and more. This termination regulator IC was developed
using power IC technology owned by ROHM.
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 News Release
11/03
ROHM Expands its Power Diode Lineup with 17 New Models |
ROHM CO., LTD. announced
the availability of 17 new power diode models. Power diodes
are used for secondary-side rectification in the switching
power supplies of products such as printers and power adapters.
With the RSX Series of high-performance, next-generation Schottky
barrier diodes featuring low VF, low IR and high surge resistance,
the RB Series of Schottky barrier diodes provide favorable
overall characteristics at low IR. ROHM has expanded its catalog
to offer coverage for voltages of 30 to 100 V and currents
of 6 to 30 A. The new introductions represent the company's
response to requests from power supply manufacturers for an
expanded selection of high-performance diodes across key power
regions. ROHM hopes to establish share leadership in this market
by contributing to set efficiency.
The newly introduced RSX and RB Series take the performance
characteristics of both series, which have already been well
received in the small signal to middle power class markets
and expand upon their power region coverage.
In designing these new models, ROHM deployed its proprietary
fine processing technology to secure improved VF/IR characteristics
- the balance of which has traditionally been a significant
power diode issue. The company was able to avoid traditional
trade-offs, achieving a low VF that ranks at the top of the
class for power diodes (with the RSX1001T3, a reduction of
about 10% compared to previous models) without sacrificing
IR characteristics. The new models maintain the high avalanche
tolerance and high surge voltage (about 2 times those of previous
models) that have come to characterize the RSX Series.
The RB Series provides outstanding overall performance able
to withstand voltages of between 40 and 100 V as well as offering
improved IR characteristics, which are of key importance in
power supply circuits. Regardless of the voltage rank, all
new models feature specifications that are significantly improved
over previous offerings while delivering top-class levels of
performance in other areas.
This expansion in ROHM's lineup will contribute dramatically
to the strength of the company's high-performance Schottky
barrier diode offerings in the Io=30 mA to 30A range to meet
customer needs and set applications that range from detection
to cellular phones, printers and switching power supply current
use.
ROHM has a history of leveraging its proprietary design technology,
device technology, and in-house production technology in order
to develop products that meet marketplace needs as quickly
as possible. The company has positioned itself to respond favorably
to the expectations and trust of its customers pushing ahead
with products designed to complement the trend of smaller,
portable and more energy-efficient sets. |
 News Release
9/03
ROHM Develops Industry's Top Level Speed (1.5 times
quicker than conventional switching speed) Fast Recovery Diode |
ROHM
CO., LTD. recently completed the development of the RF073M2S
(0.7 A type) and RF103L2S (1.0 A type) fast recovery diodes.
These diodes used for the power supply blocks of electronic
devices including plasma TV sets have a dielectric strength
of 200 V and performs the industry's top level switching
speed with a typical trr of 9 ns and a maximum trr of 20
ns, which is 1.5 times as short as the trr of conventional
models.
Diodes with a low VF and high switching speed are in demand by the power supply
blocks of a variety of electronic devices including plasma TV sets. Therefore,
the fast recovery diode has been applied to these products. The fast recovery
diode is a type of silicon diode with an improved short reverse recovery time
(trr). Conventional fast recovery diodes have a trr ranging from 30 to 40 ns.
In
order to increase the trr range, ROHM adopted a new process with optimized
materials to make improvement in the trade-off relationship between the VF
and trr and succeeded in the development of the RF073M2S (0.7 A type) and
the RF103L2S (1.0 A type) fast recovery diodes. These diodes
achieve high-speed
switching with a typical trr of 9 ns and a maximum trr of 20 ns. These diodes
ensure the low dissipation of power supply circuits and greatly suppress
heat generation.
Features:
- High speed: trr = 9 ns typ., 20 ns
max IF = 0.5 A, IR=1 A, and Irr = 0.25*IR
- Reverse breakdown voltage: 200 V
- Compact packages: PMDU (RF073M2S),
PMDS (RF103L2S)
ROHM has been making full use of its
unique design technology, device technology and its own production
technology to develop and release products to respond to
market demands. ROHM will continue developing user-oriented
products contributing to the downsizing of electronic devices
with improvement in portability and energy-saving performance. |
 News Release
9/03
Industry's Top Level Super-Low ON Resistance (1/2 of conventional ON resistance)
New-type Power MOS FET |
ROHM CO., LTD. recently
developed the RQW250N03, a power MOS FET in SOP8 that achieves
the industry's top level super-low ON resistance of 2.4 m?
(at an ID of 20A). In order to meet to the market demand
and respond to expectations of an increase in the efficiency
of the power supply with a space-saving feature, ROHM has
developed the RQW250N03 as a new package device.
The power
MOS FET is playing major roles in the power supply blocks
of all types of applications. Due to the reduction of
the operating voltage of electronic devices, in particular,
there has been an increasing demand for low-voltage, high-current
power supplies. The CPU of the notebook PC has the severest
demand for a special power supply. There is a rapid tendency
of the power supply block of the CPU to drop its output to
a level as low as 1.3 V while it demands a current as high
as 60A or over. With the adoption of multi-phase design,
the power supply block uses a number of DC/DC converters
of synchronous
rectification type. As a matter of course, super-low ON resistance
with a low Qgd is strongly demanded from the MOS FET units
used for the synchronous rectification block. There was no
single MOS FET model that achieved the required ON resistance
in the past. Therefore, the conventional power supply needs
two MOS FET units connected in parallel to meet the requirement.
The
RQW250N03 achieves the industry's lowest ON resistance
of 2.4 m?, i.e., a 50% reduction from the ON resistance (4.9
m?) of ROHM's conventional models. The RQW250N03 ensures
a Qgd of 11 nC - a 20% reduction from that of ROHM's conventional
models. The RQW250N03 is in a new package with a package
power
dissipation as high as 3 W. A single RQW250N03 unit used
in the CPU power supply circuit demonstrates higher efficiency
in power supply conversion than the conventional circuits
that
use two MOS FET units. This application has verified that
the characteristics of the new package with a super-low
ON
resistance
of 2.4 m? and a Qgd as low as 11 nC with the package power
dissipation as high as 3 W has become closer to the ideal
characteristics as an Nch MOS FET model used for the low-side
synchronous rectification
block of the DC/DC converter for the CPU power supply of
the notebook-type PC excelling the characteristics of the
conventional
two MOS FET units. As a result, a single RQW250N03 replaces
the conventional power supply circuits that use two MOS
FET units connected in parallel.
The DC/DC converter of synchronous
rectification type for the notebook-type PC is a typical
application example of
the RQW250N03.
The RQW250N03 is suitable to all other applications that
require super-low ON resistance as well. The RQW250N03
contributes to a reduction in the dissipation of the
power supply and
a
decrease in loss of signal lines for a variety of applications.
The
features of the RQW250N03 as a newly developed Nch MOS
FET unit with super-low ON resistance include the
following items.
1) A super-low ON resistance of 2.4
m? at an ID of 20 A (1/2 of ON resistance of ROHM's conventional
models).
2) The Qgd as low as 11 nC (20% reduction from the
Qgd of ROHM's conventional model).
3) The application of a single unit ensures power
supply conversion at an efficiency rate of 80% or
over (at
Vout=1.3 V and Iout=20
A).
4) Compact package: SOP8
5) High heat radiation performance at a package power
dissipation (PD) of 3 W (1.5 times as high as that
of ROHM's conventional
models).
6) Ideal for the DC/DC converter of synchronous rectification
type used for the power supply of the PC.
ROHM will
make use of the development technology applied to this
device, further develop new MOS FET
units for
the high
side and other circuit blocks and make efforts
toward expansion of the MOS FET series to meet the market
demand. |
 News Release
8/03
Dedicated Engine for Advanced Cellular Phones Incorporating Camera Multimedia
Image Processor BU1594GS |
ROHM CO., LTD. recently
developed the BU1594GS, a multimedia image
processor LSI. This product is a single-chip LSI designed
cellular phone models that are becoming increasingly more
functional with advanced features such as a camera feature.
This single-chip LSI, which is ideal for flip phone models,
makes it possible to process major signals in the LCD (liquid
crystal display) panel (the upper panel) of the cellular
phone. Therefore, the BU1594GS greatly reduces the number
of wires currently necessary in cell phones. The BU1594GS
will functionalize the entire cellular phone system and
contribute to the efficient designing of the system.
The shipment of BU1594GS product samples
started in July, and the mass production of the LSI will
start in October 2003 at an initial monthly rate of one
million units.
Recently, the cellular phone has incorporated
advanced functions (e.g. camera, large-size LCD screen,
and better image-processing) at a growing speed, which
makes the internal system including the signal processing
line more complicated. These advanced features greatly
increase the burdens of the CPU and DSP and are becoming
a large obstacle in furthering these enhancements.
The new BU1594GS is an excellent single-chip
LSI that supports the system easily without imposing additional
burdens to the CPU or DSP. Conventionally, the CPU, where
the image signal is processed and the signal sent to the
LCD panel, once captures the camera signal. Therefore,
when the cellular phone is in camera mode, the CPU occupies
itself with the processing of the signal. On the contrary,
the newly developed LSI works as a dedicated engine, thus
operating by temporarily receiving set commands (instructions)
from the CPU. This means that the CPU is freed unless the
CPU is making command settings, which alleviates the burdens
of the CPU. As a merit, the CPU can afford to process other
items. The CPU connects to this LSI through a host interface,
and the LSI connects to the camera and LCD panel greatly
reducing the number of wires in the hinge point. This LSI
also incorporates an oscillation circuit as countermeasures
against EMI (electromagnetic interference), thus downsizing
the set and increasing the degree of design freedom of
the hinge point.
The one-chip LSI includes the following
functions. Camera interface, camera signal filter processing,
image signal processing, main LCD interface, sub LCD interface,
display memory, memory control, JPEG codec, backlight white
LED control, illumination LED control (supporting RGB),
and host interface functions.
The LSI has the following main features.
1) Displays 15 frames per second.
2) Power consumption as low as 7mW while in viewer mode (at the rate of 15
frames per second).
3) JPEG encode/decode functions are built in.
4) The JPEG compression of the VGA-size picture is possible at the rate of
15 frames per second.
5) Real-time image frame composition and overlay processing functions.
6) Provided with an LCD through mode that can be built into existing systems
with ease.
The LSI has many other features as
well as the above ones.
ROHM has an accumulation of high technology
and know-how in the fields of the image signal processing
of visual equipment along with the communications signal
processing and control of communications equipment. ROHM's
new product is the concentration of technologies at highly
advanced levels in the respective fields. |
 News Release
8/03
64-Tone Polyphonic Hi-Fi PCM Sound Generator LSI Chips for Cell Phones |
ROHM CO., LTD. introduces
the BU8709KN, a PCM sound generator LSI capable of generating
64 hi-fi polyphonic tones at CD quality. This chip is designed
for the rapidly expanding, global, multimedia cellular
phone market.
There are many advantages to
using the BU8709KN LSI chip in cellular phones. To start
with, the number of tones
available simultaneously jumped from 32 to 64 greatly increasing
the range of possible ring sounds, and for CD-grade sound
quality, the BU8709KN has a sampling rate of 44.1 kHz.
This module also includes the industry’s first equalizer
and reverb functions for cell phones by taking advantage
of ROHM’s vast experience in a variety of digital
and analog audio LSI chips. This feature allows users to
make delicate adjustments to the sound quality of the ring
tones according to the specific speakers and the housing
structure of the cell phone.
Other features of the BU8709KN include 222 tones; PCM/MIDI
core; sequencer core; programmable wave tones; built-in
2 channel ADPCM decoders, 1 channel ADPCM encoder, ROM,
RAM, serial/parallel CPU interface, graphic equalizer,
I2S digital audio output; and stereo and mono output.
ROHM, the world's largest component-only manufacturer
was founded in 1958 in Kyoto, Japan. ROHM designs and manufactures
integrated circuits and other electronic components including
monolithic ICs, power modules, photo link modules, transistors,
diodes, LEDs, LCDs, Laser diodes, thermal heads, image
sensor heads, and LED displays. By building its manufacturing
equipment in-house, developing highly automated production
methods, and pioneering in advanced environmental friendly
productions, ROHM has become a key player in custom LSI,
and other semiconductor products. |
 News Release
7/03
IrDA Infrared Communications Module with Built-in LED Driver & Remote Control
Functions |
ROHM CO., LTD. introduces
the RPM882-H7 IrDA infrared communications module that incorporates
a built-in LED driver and remote control transmission function
in a single-chip solution.
The increasing demand for using portable devices such
as cell phones as a remote control for audio-visual equipment
and home electronics has created a need for an IrDA infrared
communications module with remote control abilities, which
is why ROHM has built just such a chip.
There are many benefits of using the RPM882-H7. For one,
the LED is positioned in the center of the module ensuring
excellent directivity free of optical axis deviation. It
also uses a GaAlAs LED with high luminous intensity, which
provides a remote control distance of 9m (when the transmission
LED current is 200mA). This distance is 1.8 times as long
as the remote control distance of conventional models,
which are approximately 5m. As a result of this feature,
the current consumption is half that of conventional models
making the RPM882-H7 ideal for cellular phones and PDAs
that require modules with low power consumption. The single-chip
package as compact as conventional models (2.2 mm high,
8.0 mm wide, and 2.9 mm deep), also makes these modules
easily built into portable devices. Other features include
built-in driver functions using a newly designed LSI chip
and a digital interface that supports down to a minimum
voltage of 1.5V.
There were two problems to be faced in building a remote
control function into an IrDA communications module. The
first problem was that the module had to support a transmission
wavelength range of 900 to 950nm, which is different than
the IrDA transmission wavelength (850 to 900nm). This caused
the dispersion of directivity characteristics when two
LED chips were used. The second problem was how to build
the driver circuit for remote control use, which generally
requires a higher current compared to the IrDA.
ROHM, the world's largest component-only manufacturer
was founded in 1958 in Kyoto, Japan. ROHM designs and manufactures
integrated circuits and other electronic components including
monolithic ICs, power modules, photo link modules, transistors,
diodes, LEDs, LCDs, Laser diodes, thermal heads, image
sensor heads, and LED displays. By building its manufacturing
equipment in-house, developing highly automated production
methods, and pioneering in advanced environmental friendly
productions, ROHM has become a key player in custom LSI,
and other semiconductor products. |
 News Release
7/03
Supporting High-speed Communication at 480 Mbps Surge Protection Element with
Industry's Lowest Capacitance Level |
ROHM CO., LTD. has
recently started the mass production of the RSB12JS2 surge
protective element that
achieves the industry's top-level capacitance of 1pF for
high-speed interface applications, such as USB2.0 (at 480
Mbps). This new product is the industry's most compact multi-pin
in a 1612-size package with a super-low pin-to-pin capacitance
of 1pF. Its mass production has started at a monthly rate
of one million units.
Presently, USB2.0 is spreading
as a standard high-speed serial interface built into
the PC.
However, it seems that the full-fledged
data transmission of peripheral devices at 480 Mbps as
the highest specification of the USB2.0 has just started
getting
into its stride. One of the reasons is that there is
difficulty in data waveform maintenance at the time of
transfer and
surge protection. As for medium- and low-speed USB standards
at 1.5 and 12 Mbps, the required communications speeds
are low with a data amplitude of 3.3 Vpp secured. Therefore,
standard Zener diodes are used to provide sufficient
surge
protection. In the case of USB2.0 high-speed standards
at 480 Mbps, however, the time constant of the surge
protection
circuit poses a big problem as a result of the increased
communications speed with an accompanied amplitude as
low as 400 mVpp. The market has been requiring a surge
dielectric
strength of 10kV or over and a super-low pin-to-pin capacitance
of 1pF or below.
In the past, there was a problem
awaiting the solution in the development of the surge
protection
element with
super-low
capacitance, i.e., the surge dielectric strength increased
or decreased in proportion to the pin-to-pin capacitance.
This meant that the surge dielectric strength dropped
when an attempt was made to decrease this parasitic
capacitance. The pin-to-pin capacitance increased when
an attempt
was
made to maintain a sufficient surge dielectric strength.
There were no surge protection elements satisfying
these conflicting requirements.
To solve this problem,
the RSB12JS2 surge protection element was developed
with a fundamental review of
the process of
chip production. ROHM succeeded in developing this
dedicated chip for high-speed data communication.
As a result,
the product offers a super-low capacitance of 1pF
along with
a surge dielectric strength of 10kV and over to satisfy
the existing needs (IEC-6100-4-2 requirements) of
the market.
This product is the industry's first surge production
element marketed with a capacitance of 1pF and a
high surge dielectric
strength of 10kV and over (Surge conditions applied:
A charge and discharge capacitance of 150pF and a
discharge resistance
of 330 ? with 10 contact times). Other features include
bidirectional for surge protection from GND and Subminiature
mold model
EMD6.
ROHM makes full use of its unique
design technology, device technology and original production
technology
and responds
quickly to the needs of the market. ROHM will continue
the development of downsized, easy-to-carry, and
energy-saving products from users' viewpoints. |
 News Release
6/03
First Ever Reflow Soldering-Enabled Surface Mounted Models Join ROHM's Market-Leading
Lineup of LED Numeric Displays |
ROHM CO., LTD. has
recently developed the industry's first LED numeric displays
that allow reflow soldering and
automatic mounting. ROHM has released two new surface mounted
LED single-digit numeric displays: the LF-301VA/VK with a
peak emission wave length of 650 nm (in red) and the LF-301MA/MK
with a peak emission wavelength of 563 nm (in green). The
company will market anode and cathode common versions of
both models for a total of four versions of the new LED.
With a character height of 8 mm, the displays offer advantages
in a variety of applications, including FA (factory automation),
pachinko and other game machines, and ticket and vending
machines. Mass production began at a monthly rate of 200,000
units this spring.
While the LED numeric format
is less suited to intricate displays than LCD or organic
EL technology,
exceptional brightness
and excellent visibility makes the LED ideal for an array
of applications that require easy-to-see display.
Amid
the trend toward downsizing FA equipment, most of which
uses compact LED numeric displays, there has been
a dramatic
increase in the percentage of surface mounting components
these machines incorporate. Most components aboard
FA machines are the surface mounted variety with the
exception
of their
LED numeric displays. Although demand for surface mounted
LED numeric display models has been increasing as manufacturers
seek to reduce production processes, the materials
used in conventional versions present obstacles to their
incorporation.
The outer casings are melted by heat at the time of
reflow soldering, while heating also softens the internal
resin,
putting stress on the elements, and resulting in failure
of the displays to turn ON. Improving the heat resistance
of these materials is the key to the widespread adoption
of surface mounted LED numeric displays.
ROHM has developed
a unique mixing technology for the external casings
and internal resin to increase Tg
(glass transition
point), thus making reflow soldering possible. By
improving the heat resistance of the internal resin and
external
casings, ROHM has sharply reduced the heat stress
of reflow soldering
on the internal elements of LED numeric displays
enabling development of products with reflow soldered
LEDs.
The newly developed surface mounted LED numeric displays
allow Pb-free
reflow soldering. The terminals are coated with Sn-3Ag-0.5Cu
solder and designed to withstand a variety of high-temperature
Lead-free soldering conditions. Moreover, ROHM has
adopted
taping packaging that supports automatic mounting
of these new models. Unlike their conventional counterparts
with leads,
ROHM's new LEDs do not require manual solder mounting
reducing the number of mounting steps needed.
The
newly developed surface mounted LED numeric display
models offer a number of outstanding features:
- First models in the industry
to support reflow soldering at a recommended peak temperature
of 250°C and a
peak time of 5s.
- Four versions in the model lineup: LF301VA/VK (anode/cathode
common) single-digit display models (in red) and LF-301MA/MK
(anode/cathode common) single-digit displays models (in
green) , all with a character height of 8mm.
- Support lead-free soldering.
- Enable automatic mounting due to the adoption taping
packaging.
ROHM has deployed unique semiconductor and surface mount
package technologies in its efforts to meet the needs of
the optical semiconductor element markets. ROHM will continue
developing innovative products, cutting edge technologies
and optical devices to increase customer satisfaction. |
 News Release
6/03
Breakthrough
Rectifier Diode from ROHM Offers Top-Class Surge Resistance
for On-Vehicle Applications |
ROHM CO., LTD. is
now mass-producing its new RR264M-400 rectifier diode,
which achieves superior surge
resistance in a 2616-size package. The compact RR264M-400
has a forward current of 1.0A and a reverse voltage of 400V,
specifications that make it an excellent choice for applications
that require surge protection, such as on-vehicle devices
and digital cameras. Mass production began at a monthly rate
of two million units this spring.
In the automobile industry,
a major market for rectifier diodes, manufacturers
have been adding functionality to cars
with a variety of new features from safety devices like
SRS dual airbags to cruise control, ETC and car navigation
systems
for greater driving ease and convenience. As the automobile
becomes multi-functional, the number of modules incorporated
will continue to increase, and with it, the number of
rectifying diodes for electrostatic and other surge protection.
Each
module, in turn, mounts more and more components. The
growing need for higher-density component mounting on
automobile
modules is driving demand for rectifier diodes with superior
overall surge resistance.
Conventional rectifier diodes
may offer either excellent surge current or surge voltage
strength, but not both.
That is why ROHM has been working to meet the formidable
challenge
of simultaneously improving the surge current strength
and surge voltage strength of its rectifier diodes.
With the
development of a new diffusion process, ROHM has now
achieved a breakthrough diode with surge current strength
increased
to 45A some 1.2 to 2.5 times higher than conventional
rectifier diodes and surge voltage strength upped to
30KV, which is
approximately 1.3 to 6 times as high.
The newly developed
RR264M-400 rectifying diode offers the following main
features:
- Compact, thin-profile PMDU package (2616 size)
- Forward current IF=1.0A, mean rectifying current IO=0.7A,
and peak reverse voltage 400V
- Surge current 45A (Applied condition 60 Hz/1cyc)
- Surge voltage 30KV (Applied condition C=100pF/R=1.5
K?)
ROHM meets the needs of the market by taking advantage
of its unique design, device and production technologies
in designing and manufacturing diodes. The company will
continue developing products from the user's viewpoint,
working to fulfill the demand for compact, portable, energy-saving
consumer technologies. |
 News Release
5/03
Thin, Lightweight,
Full-color Dot Matrix LED Units with Wide Viewing Angle
Utilizing RGB Emitters |
Recognized as providing
an excellent interface between people and information,
ROHM’s LED displays are finding widespread applications
in a variety of fields, such as arrival/departure information
boards at train stations, information displays on trains,
and various other information board applications.
For its new LED display products
incorporating RGB emitters, ROHM has developed, in addition
to the three-emitting-color types, full-color dot-matrix
LED units, the LPM-5123BMU652 and the LPM-1153BMU602. By
making optimum use of its distinctive potting lens development
technology, we achieved high readability and high viewing
contrast compared with conventional products.
By incorporating a 1,024-level grayscale driver for each
color of red, green and blue, these modules are capable of
producing a maximum of one billion colors for more realistic
colors. It is expected that, besides conventional information
board applications, they will also find an application in
large displays for video images and the like.
ROHM's full color
dot matrix units are ideal for train schedule displays,
and message boards and graphic displays.
With 1024 gray levels per each color,
wide viewing angle, thin structure and high contrast. |
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