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Maßnahmen zur Verbesserung der EMV-Eigenschaften von LCD-Modulen

Maßnahmen zur Verbesserung der EMV-Eigenschaften von LCD-Modulen

 

Die Störanfälligkeit von LCD-Modulen ist regelmäßig ein wichtiger Punkt im Design von Produkten. Viele unserer Kunden stellen sicherheitsrelevante Geräte her, bei denen die einwandfreie Funktion der Anzeigeelemente unerlässlich ist.

Wir nutzen daher verschiedene Möglichkeiten um unsere Displays vor Störungen zu schützen. Einige Beispiele führen wir im Folgenden auf. Je nach Produkt können weitere Mittel zum Einsatz kommen. Gerne beraten wir Sie hierzu im Detail und erarbeiten eine kundenspezifische Lösung.

1. COG- oder TCP-Modul mit Anschluss per FPC: Verwendung eines geschirmten FPCs

2. Anschluß von TFTs mit hoher Datenrate: Wechsel von TTL RGB auf ein differenzielles Signal wie LVDS, HDMI, MIPI

3. Verwendung einer Ringelektrode, auch als ESD-Schutzmaßnahme im (COG/TCP-) Display 

4. Displays mit (SPI- oder) I2C-Schnittstelle: Softwareseitige Anpassungen, Nutzung unserer für diese Zwecke angepassten Schnittstelle

5. Software: Anpassungen in der Initialisierung können helfen EMV-Einflüsse zu mindern

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38 Hits

CO2-sparende Transportalternativen

CO2-sparende Transportalternativen

Schon seit einiger Zeit machen wir uns Gedanken, wie wir unsere CO2 Bilanz verbessern können. In erster Linie sind dafür unsere Transporte aus Asien verantwortlich, die bisher oftmals per Luftfracht kamen.

Die dem Coronavirus geschuldete Reduzierung der Flugkapazitäten zwischen Asien und Europa hat nun zu einer drastischen Verteuerung der Luftfrachtraten geführt. Viele unserer Kunden entscheiden sich deshalb inzwischen für Bahn- oder Seefracht unter Inkaufnahme einer längeren Transportdauer.

Diese Entwicklung wird es uns ermöglichen, im Jahr 2020 die Menge des durch den Transport erzeugten CO2 um ca. ein Drittel zu senken.

Solche Transporte erfordern oft Mindestvolumina, die wir durch kontinuierliche Steigerung unserer Importe regelmäßig erreichen.

Gerne stellen wir auch Ihre Sendungen auf eine CO2-sparende Transportalternative um!

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315 Hits

Runde Wearable TFTs

Inzwischen sind mehr und mehr runde TFTs auf dem Markt verfügbar. Viele davon mit hohen Mindestbestellmengen und besonders geeignet für Wearable Produkte.

Im Folgenden eine Auswahl der aktuell verfügbaren Modelle. Alle TFTs natürlich auch mit kapazititvem Touch und individuellem Frontglas verfügbar.

Bitte kontaktieren Sie uns bei konkretem Interesse. Gerne stellen wir Ihnen weitere Informationen zur Verfügung. 

1.3" TFT

1.8" TFT

2.1" TFT

2.47" TFT

3.4" TFT

 

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461 Hits

Wir verändern uns: Neuer Name und neue Adresse

Wir verändern uns: Neuer Name und neue Adresse

Nach einjähriger Bauzeit ist es soweit: Unser neues Firmengebäude in Ettlingen ist bezugsfertig. Wir freuen uns auf ein modernes Arbeitsumfeld, das in seiner Aufteilung den gewachsenen Anforderungen an moderne Lagerhaltung, Produktion und Büroarbeitsplätzen gerecht wird.

Ab dem 1.7.2020 finden Sie uns unter folgender Adresse:

LCD Mikroelektronik GmbH
Otto-Lilienthal-Straße 13
76275 Ettlingen
(+49) 7243 - 76888 - 0
(+49) 7243 - 76888 - 29

Passend zu den neuen Räumlichkeiten haben wir auch unseren Namen vereinfacht: aus LCD-Mikroelektronik Dr. Hampel & Co. GmbH wird die LCD Mikroelektronik GmbH.

Wir hoffen, dass wir Ihnen mit diesen positiven Veränderungen in der Zukunft einen noch besseren Service bieten können und freuen uns darauf, Sie hoffentlich bald in den neuen Räumlichkeiten begrüßen zu dürfen.

Ihr Team der LCD Mikroelektronik

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321 Hits

Unser Beitrag zur Bekämpfung von COVID-19

Unser Beitrag zur Bekämpfung von COVID-19

Als Zulieferer für bekannte Medizin- und Labortechnikunternehmen, sind wir stolz darauf, dass unsere Produkte helfen die aktuelle Covid19-Pandemie zu bekämpfen. Unter anderem finden sich Displays von LCD Mikroelektronik in COVID19-Schnelltestern, Intensivmedizinischen Pumpen und Pipetten.

Displays mit kapazitivem Touch und Frontglas sind wegen der guten Reinigungsmöglichkeiten für medizinische Anwendungen besonders geeignet. Der Touch ist auch mit Handschuhen bedienbar, Fehlauslösungen z.B. durch Kontakt mit Flüssigkeiten, können softwareseitig unterbunden werden.  Gleichzeitig ist die Form des Frontglases frei wählbar und es kann individuell z.B. mit dem Firmenlogo bedruckt werden. 

Da LCDs fast ausschließlich in Asien produziert werden, bestanden zu Beginn des Jahres geringfügige Lieferengpässe, die inzwischen jedoch vollständig behoben sind. Einziges Hemmnis sind im Moment die geringen Transportkapazitäten im Luftfrachtbereich. Hier raten wir allen Kunden zur frühzeitigen Bestellung, so dass wir alternative Transportwege (See-/Bahnfracht) wählen können und hohe Frachtzuschläge vermieden werden.

 

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488 Hits

LCD-Mikroelektronik wird Mitglied des DFF

LCD-Mikroelektronik wird Mitglied des DFF

LCD-Mikroelektronik ist seit diesem Jahr Mitglied des Deutschen Flachbildschirm Forum.

Von unserer Mitgliedschaft erhoffen wir uns einen intensiven Austausch mit anderen Firmen im LCD-Bereich, sowie die Möglichkeit an neuen Technologien und Industriestandards mitzuarbeiten, die letztendlich unseren Kunden direkt zugutekommen. 

Mehr erfahren Sie unter https://www.displayforum.de/

 

 

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601 Hits

13" E-Paper module

New 13" E-Paper module with reasonable price available:

  • 960x680 resolution
  • customizable with touch

Contact us for your offer!

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898 Hits

Low power color TFT displays

Often an important constraint for industrial application is power consumption.

Passive monochrome LCDs will usually use less power, than TFT displays. Hence many customers looking for suitable displays for industrial application had to use traditional monochrome LCDs if they wanted to add a display to their application. 

With the new generation of low power TFT displays, this could change. Low power applications will become colorful. 

Following is an example of a transflective TFT display which can be used both with and without backlight illumination. The powering off of the backlight will save further power and can also be useful in sunlight environments, where enough light is available. 

Traditional TFT displays are transmissive, they can only be read with the help of a backlight. Transflective displays combine the advantages of transmissive displays (they can be read in the dark with the help of a backlight), with the advantages of reflective displays (they can be read without backlight). 

 

Current consumption values

(with 1.8 V supply voltage)

200 micro A in hyper mode

19-50 micro A in low power mode

 

Technical Specification

Parameter Value
Size  1.28"
Resolution 176 * 176
Color Depth 64 Colors
Interface SPI
Technology Type a-Si TFT
Sub Pixelsize 0.1308*0.1308 mm
Display Mode Half the semi-premeable
Viewing Direction ALL
LCM (W * H * D) 26.62*29.72*1.45 MM
Active Area (W * H) 23.02*23.02 MM
Operating Voltage 1.8 – 3.6 v
Operating Temp -20°C ~ 70°C
Driver IC ST7301
   

 

With backlight:

Without backlight:

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1415 Hits

Bar type TFT for electronic shelf labeling

Electronic shelf labeling has been a typical e-paper topic. While it is power saving and simple to equip existing shelfs with it, it is also limited in color and and variety of pictures. Videos are not possible.

A new TFT, made to fit typical shelf fronts, could be the alternative:

Display size

23,2"

Resolution

1280*92

Technologie

IPS

Interface

LVDS

Brightness

500 cd/m²

Active Area

588,48*42,297

Viewing Direction

70/60/80/80

Operating Tepmerature

0 - +50°C

Storage Temperature

-20 - +60°C

 

 

 

 

 

 

 

 

 

 

 

Further bar type TFTs are availalbe:

Size (Inch) Width Height
1,8 240 76
2,96 320 124
3,83 480 107
4,58 800 320
6,5 800 320
9,36 1024 400
8,8 480 1920
10,4 1024 100
19 1920 360
23,2 1280 92
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879 Hits

Why MIPI is not suitable for industrial displays

Why MIPI is not suitable for industrial displays

One of the most important requirements for industrial customers is long term availability. This is why it is more than surprising that MIPI displays are offered for industrial purpose. Read here why MIPI is not the preferred solution for industrial TFTs.

What is a MIPI display?

A so called MIPI TFT display is a display with a MIPI-DSI interface which is specified by the MIPI Alliance. The members of this alliance develop interfaces exclusively for the mobile communications industry. The main objectives of the MIPI-DSI interface are: high performance, low power consumption and low electromagnetic interference while reducing pin count and maintaining compatibility across different vendors. Every smartphone display is based on this interface.

A further benefit of these displays is that they are only produced in mass production and therefore the prices are very low. But that also means that all MIPI-Displays which are available on the market are currently produced for smartphone application only. On this fast consumer market every year new smartphones with new displays are developed and because of the high quantities (e.g. Samsung Galaxy S7: >55mil. pcs.) the tooling costs doesn’t matter.

That means that the product lifecycle is very short and the long-term availability doesn’t exist. Nobody will care about an additional customer with an annual demand of 10k pieces. And that is why a product change notification in due time doesn’t exists either.

 

MIPI-DSI protocol

Another big challenge is the MIPI-DSI protocol. Besides a data protocol for the image data there is a SPI interface for configuration. Every display has a different command set. That’s why it is not possible to switch the display. If the customer wants to use a different display, the programming has to start from zero. As nobody cares about small customers (

 

What is the Solution?

  • The use of standard technologies (TFT-LCD) with standard sizes and standard resolutions
  • The application of well documented interfaces, standard for 15 years: digital RGB (TTL)
  • Standardized pinout of the FPC connector e.g. the family-TFT interface of LCD-Mikroelektronik

We look forward to providing you with more information on long-term availability. We would be pleased to prepare an individual offer for you.

 

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Historic Discovery

As a long-established design house for display applications, LCD-Mikroelektronik can draw on decades of experience. Our founder experimented with the first liquid crystals already in the seventies of the last century. Here are some finds from a long time ago:

1. One of the first segment displays of LCD Mikroelektronik, which is probably more than 25 years old and has a green-yellow illumination. The display does not yet have its own display driver.

2. On this display the chip was turned by 180° and installed upside-down and has its own gap in the printed circuit board to reduce the overall height. For correct positioning, the display is fixed by a lateral spring. The light guide sends the light from behind over both sides through a prism effect onto the display.

 

3. Self-built display with silver wires and space for a total of 9 ICs on the two glasses.

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2261 Hits

Capacitive touch with USB interface

Are you looking for an easy to use touch solution? 

-          Ilitek touch IC ILI2511 is a single chip capacitive touch controller

-          Easy plug in via USB

-          Multi-finger input (max. 10-fingers)

-          For Windows 8.1, Windows 10 and Android

-          Optimized for industrial applications, POS and ATMs

-          Starting from 7“ up to 10,1“

-          Integrated USB 5V to 3,3V low drop-out regulator 

-          Supports 1,8V and 3,3V operation for VDDIO for I²C and SPI

-          Built-in 32-bit high performance Micro-controller (MCU)

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3252 Hits

Bar type TFTs

We offer a variation of bar type TFTs e.g. for HiFi or rack applications, e.g.

4.6" TFT

5.8" TFT

6.5" TFT

9" TFT

 

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2950 Hits

Low power passive matrix display

LCD-Mikroelektronik provides passive matrix displays with power usage of under 150 uA for energy critical applications!

Of course the power usage depends also on the displayed content. With six different contents  a power consumption range from 125 to 296 uA with a setting of a reference voltage of 8,35V, a booster of 3xVDD2 and a duty cycle of 1/128 could be measured.

 

The shown display is a low power monochrome FSTN positive matrix display with an SPI interface, FPC connector and a resolution of 128 x 128 dots. It has an active area of 55 x 55 mm and an operating temperature of -20  to +70°C, the drive method is 1/128 duty with a bias of 1/12.

The used power saving controller IST7920 comes from “Integrated Solutions Technology”. It supports a SPI, I²C as well as 6800 and 8080 interface. By  reducing the reference voltage, the booster and the duty cycle even the very low data between 55- to 94uA on the six different contents can be reached:

reference voltage

6,6 V

 

6,6 V

 

5,9 V

 

5,0 V

 

4,45 V

 

booster

 

3x VDD2

 

3x VDD2

 

2x VDD2

 

2x VDD2

 

2x VDD2

 

duty cycle

 

1/96

 

1/64

 

1/48

 

2x VDD2

 

1/24

 

power consumption

113 - 250 uA

 

103 - 209 uA

 

62 - 118 uA

 

57 - 97 uA

 

55 - 94 uA

 

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4255 Hits

Sunlight readable displays

Normal displays, especially TFTs, are difficult to read in direct sunlight. If you want to make them sunlight readable, you need to consider some points in the design of your TFT module.

1. The surface brightness must be at least 500 cd/m2, in fact it is better to provide e.g. 800 cd/m2.

You may notice that you will increase the brightness of your smartphone in direct sunlight. If you decrease the brightness, the TFT seems to be black. So an essential point in order to design sunlight readable applications is to increase the surface brightness with a powerful backlight.

2. Use an anti-glare surface or anti-reflection coating. 

With a special anti-glare lens or anti-reflection coating you can reduce reflections on the surface of the module, which make the TFT difficult to read in direct sunlight.

3. Use optical bonding of front-glass and touch to display

Additional boundary layers in the module, between frontglass and touch as well as touch to TFT, cause additional reflections. Eliminating those boundaries by bonding the parts with optical clear adhesive or optical clear resin, will increase sunlight readability. 

Please contact us for further questions on sunlight readable modules, we are happy to help!

 

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2818 Hits

Plastic front lens

Plastic front lens

A robust and light alternative to a front glass can be a PMMA coverlens.

Such coverlenses are available in different standard thicknesses and can be printed according to the customer requirements.

Hidden printing can be applied, as can be seen int he following picture. The buttons are not visible in normal mode, only if lighted up.

The edge can be cut to fit the customer housing conditions:

While breakage safety is better for PMMA than for glass, the drawback is the surface hardness. Screatches are more likely than for normal glass. 

 

 

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3002 Hits

Super small PM-OLEDs

Small OLEDS are available starting from sizes of 0,49", with a resolution of 64 x 32.

Standard sizes are for example

0,49", 64x32, blue

0,66", 64x48, white

0,72", 48x64, blue

0,84", 96x16, blue

0,91", 128x32, white

other sizes, colors and custom designs can be offered. Please contact us!

 

All small size OLEDs are COG modules with minimal space requirements. they could be used in wearables or push-buttons.

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3267 Hits

Flexible E-paper

E-paper can be bonded to several substrates, besides glass also PCB or flexible plastic can be used.

By using ultra thin plastic layers these e-papers offer new usage types. They can be used on curved or other flexible materials. 

Wir are able to offer such e-paper in different sizes as custom or standard module.

The pictures shows a flexible module with ten digits and battery status, which can be used e.g. in wearable devices due to its small size.

 

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3759 Hits

Anti-reflection film

TFT modules with gasket bonding have an air gap between touch sensor and TFT. This gap leads to reflections in the TFT and is also the reason why TFTs look greyish, not black, in power off state.

The traditional solution to this problem is full-lamination, however this option is costly and not suitable for all types of cell and coverlens combinations.

An anti-reflection - moth eye - film can be a cost efficient alternative eliminating interfering reflections.

In off state, the module looks more blackish, which gives the application a fine look.

Most TFT-modules can be equipped with moth eye film, contact us for inquiries!

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4031 Hits

Merry Christmas and a happy new year!

Merry Christmas and a happy new year!

We wish all of you, our customers, suppliers and employees a wonderful Christmas time and a happy new year!

See you all healthy and relaxed in 2017,

LCD-Mikroelektronik Dr. Hampel & Co. GmbH 

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Contact

LCD Mikroelektronik GmbH
Otto-Lilienthal-Str. 13
76275 Karlsruhe

Germany

Telefon: +49(0)7243-76888-0
Telefax: +49(0)7243-76888-29

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Exhibitions

Visit us at our stand:

Electronica Munich 2020