fluorescent lamp in lcd panel and inverter circuit brands

We have received many requests for LCD’s that contain a CCFL backlight (aka: cold-cathode fluorescent lamps backlight). We are finding it more and more difficult to supply a CCFL backlight.

The Liquid crystal displays we talk about in this article are monochrome LCD displays; this includes alphanumeric LCD displays and graphic displays. We do not cover TFT LCD’s or OLED’s in this discussion.

Does not provide as even light on larger displays as a CCFL. On a larger display it may be possible to see hot and cold spots. (Although a diffuser can help to reduce this)

An estimated 80% of our character LCD displays are supplied with LED backlight or LED edge lit. 15% of alphanumeric LCD displays are supplied with no backlight. The last 5% of numeric LCD displays are supplied with EL backlight.

8x1 LCD display, 8x2 LCD display, 16x1 LCD display, 16x2 LCD display, 16x4 LCD display, 20x2 LCD display, 20x4 LCD display, 24x2 LCD display, 40x1 LCD display, 40x2 LCD display, 40x4 LCD display.

Segment Display’s do not contain a backlight as a standard option. It is possible to order a separate backlight. This would need to be ordered as a custom LCD module. See

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LCD Inverters carry 90-Day warrantyInverter board for LCD panel Liquid crystal display (LCD) panels are used in various applications ranging from smaller portable electronic equipment to larger fixed location units.The LCD panel itself cannot emit light. Therefore, a backlight system that supplies the light from behind is normally required. Currently, the most commonly used light emitting device is a fluorescent tube called a cold cathode tube or CCFL.A special power supply, the inverter, which generates approximately 1000 to 1500V AC is required to drive a CCFL. This inverter is a small power supply used to make this CCFL illuminate, and is one of the important functional parts of a complete LCD display.Electronica make available for the after-sale market a wide range of Original Inverter board for the repair of LCD panel used in the new generation of LCD TV.The Original Inverter are originally mounted on the LCD panels that the major panel maker , like AUO, CMO, LG, SAMSUNG etc., supply to the worldwide LCD TV manufacturers.You can check the availability of the required inverter with the Search Button Above

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Most Bodine ELI series inverters include patented auto-sensing dimming control output with an industry standard 0–10V. This automatic dimming capability allows a group of multiple luminaires to be driven in emergency mode at the inverter’s maximum input power.* The dimming inverter is programmed to sense and calculate the necessary output needed to illuminate the connected fixtures, without the use of preset dip switches. The patented dimming technology is exclusive to Bodine inverters and saves you time and money by simplifying installations and allowing your emergency fixtures to be on, off, switched or dimmed without affecting emergency operation.

A CCFL inverter is an electrical inverter that supplies alternating current power to a cold cathode fluorescent lamp (CCFL). CCFLs are often used as inexpensive light units in electrical devices that are powered by direct current sources such as batteries. CCFL inverters are small, have switchover efficiency over 80%, and offer adjustable output of light. They are widely used for backlights for LCDs, or for rear lighting in advertising signs.

As for the inverter circuit of a cold cathode fluorescent lamp, a resonance type circuit has been widely used. This is sometimes referred to as the "Royer circuit". However the proper definition of the Royer circuit requires that the inversion of a switching operation be performed in a state in which the transformer is saturated. An inverter circuit which performs the inversion operation by utilizing resonance in the collector circuit of a transistor is preferably referred to as the "Baxandall converter" in distinction from a true Royer circuit.

The early designs of an inverter circuit for a cold cathode fluorescent lamp did not utilize the resonance method of a secondary circuit at all. Instead the so-called closed magnetic circuit type transformer having a small leakage inductance was used as a step-up transformer. The leakage inductance was such that it reduced the output voltage on the secondary side of the transformer. Since this was not desirable, it had to be made as small as possible.

P.J. Baxandall, "Transistor Sine-Wave LC Oscillators", International Convention on Transistors and Associated Semiconductor Devices, 25 May 1959, fig 5, p. 751