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DISPLAY Technology

A thin-film-transistor liquid-crystal display (TFT LCD) is a variant of a liquid-crystal display (LCD) that uses thin-film-transistor (TFT) technology to improve image qualities such as address ability and contrast. A TFT LCD is an active matrix LCD, in contrast to passive matrix LCD’s or simple, direct-driven LCD’s with a few segments.

Our standard TFT LCD portfolio includes both, TN and IPS type of TFT LCD’s.

If you cannot find a suitable TFT LCD module to Your needs from list below, we are happy to help You to find a module to Your needs. We have wide partner network, to cover also Passive Matrix, Direct-Driven, PMOLED and AMOLED offering!

TOUCH SCREEN Technology
 
1. RESISTIVE TOUCH PANEL (RTP)

We’ll offer both 4-wire and 5-wire types of Resistive Touch Panels.
The most popular resistive architectures use 4-wire or 5-wire configurations of the circuit. 
 
Resistive Touch Panels have two typical stack-up options: These structures differ based on the support material used:

• glass

• polycarbonate

A more common structure used for resistive touch panels is Film/Glass. The difference is in the material of the bottom layer of the sensor and the accompanying support:

Resistive touch sensors are made of glass or acrylic substrate, which are covered with electrically conductive and resistive layers (made of film) covered with ITO (Indium-Tin-Oxide). Those layers are separated by little spacers. Working principle:

2. CAPACITIVE TOUCH PANEL (CTP)
 
The Capacitive touch sensors are very popular since they are more robust, durable, and user friendly. Moreover, it is also cost-effective when compared to resistive touch sensors.
 
The capacitive sensor is made just similar to the normal capacitor. There are two conductors separated from the insulator.
In case of the sensor, the metal plates are used as the conductors. The capacitance of the sensor can be expressed as below.
 
C = ε0 x εr x A / d
 
Where,
ε0 represents the permittivity of free space
εr represents the relative permittivity or dielectric constant
d represents the distance the parallel plates and A represents the area of the plates.
 
If the plate has more area the more capacitance it will produce and the more distance between the two plates are the less capacitance will become.
 
In the Capacitive touch sensor, there are two parallel plates that form a capacitor with the capacitance value represented as C0. As we touch the sensor through our finger, our finger acts as a conductive object and hence produces a capacitance value of CT as shown in the figure below.
 
In the application of a sensor, the capacitance C0 is measured continuously with the help of the capacitance measurement circuit. There will be an uncertain increase in the capacitance if any conductive object such as our finger touches the plate. The capacitance measuring circuit will detect the change in the capacitance and will convert it into a signal.

EPD Technology

An electronic paper display (EPD) is an electrically-charged surface that replicates the look and experience of ink on paper. 

EPD’s are extremely thin and only require power when a new image is requested. Instead of a traditional display that uses back lighting to illuminate pixels, an EPD is based on the scientific phenomena known as “electroscopes,” the movement of electrically charged molecules in an electric field.  

We offer variety of different sizes, with several Front light and Cover Lens options. PCAP (projected capacitive touch) can be also applied.

EMBEDDED DISPLAY SOLUTIONS

Our TDM’s (Touch-Display Modules) have complete stack-up of TFT-LCD, PCAP Touch, Cover Glass and Embedded Solution, Optically Bonded together.

We have also wide selection of Display Driver Boards (HDMI Boards) and Touch Screen Controller Boards. Both with various electrical Interfaces (I/F).