Focus LCDs

The best type of backlights to make brighter are LEDs since they are DC driven. A few ways to make them brighrer. 1. increase current. The down side to this is that they burn out sooner. 2. Use PWM to make them brighter without effecting their half-life 3. Use a transmissive polarizer instead of a t...

Yes. This is common for customers that use night vision. IR LEDs allow the display only to be ready by someone with the correct equipment.

there is a one-time tooling charge as this will be a custom LCD.

Yes, that is the great thing about LEDs is that they are DC (Direct Current) driven and are adjustable without any complex circuitry like what is required for a AC driven backlight such as an EL or CCFL.

There is a big difference between LED and CCFL.

LED is DC (Direct Current) driven and does not generate the noise and EMI like CCFL.
Also, LED backlights have a half-life of 70K hours compared to the 3K of CCFL.

CCFL is close to impossible to locate for new product designs.

Right now, we don't feel that OLEDs are a good replacement for VFDs (vacuum fluorescent display).
The reason is that OLEDs are prone to be discontinued more often than older technologies.

We suggest UWVD (Ultra-Wide Viewing Display) Technology for replacement of a VFD.

https://focuslcds.com/uwvd/

Transflective allows a backlight to be placed behind it for night time operation, but the display can also be read if the backlight is off. Transmissive produces a brighter backlight than transflective, but the display is not readable unless the backlight is on. Hence, not a good option for battery ...

Most Character and many graphic displays are COB (Chip on Board) which means the glass is attached to a Printed Circuit Board. Some TFTs are also COB. Sometimes the board needs to be modified (larger mounting holes, moving the pinout around, etc.) This can be done for a one-time NRE (tooling) cost r...

The difference is refresh rate.

Passive matrix refreshes each dot/pixel so many times a second.
Active matrix keeps the dot/pixel active 100% of the time.

So passive displays are not as sharp, but lower cost.
Active look reallllllllly good, but are more expensive.

Positive mode means the background is a lighter color (such as yellow/green or white) while the letter/numbers/icons are a darker color. Negative mode is just the opposite. A negative mode display must have the backlight on for it to be readable, not always the best option for a battery powered prod...

There are three types of monochrome displays: Character, Segment and graphic. Character and graphic generate letter/numbers and images by using dots. The distance (center to center) between dots is called the 'pitch'. The smaller the pitch, the closer the dots are to each other providing a sharper c...