Instrumental panel cluster is an integral part of the vehicle can bedivided into three categories: indicator lamps,warning lamps, and illumination lamps. In some circuits, such as high-beam headlamps and turn signal lamps, include an indicatormounted on the instrument panel. Warninglamps, which alert the driver to vehicle operatingconditions. It helps to display all the key vehicle information of the vehicle such as vehicle speed, engine speed, vehicle operating hours, fuel level, engine oil pressure indicator and coolant temperature indicator, diagnostic trouble codes (DTC), malfunction indication lamp (MIL), tyre pressure, seat belt indicator, airbag systems, etc.
The light-emitting diode (LED) is a diode thattransmits light when electrical current is passedthrough it. An LED display is composed of small dotted segments arranged to formnumbers and letters when selected sections areturned on. The LED is usually red, yellow, or green.
A liquid crystal display (LCD) uses sandwichesof special glass containing electrodes and polarized fluid to display numbers and characters.Light cannot pass through the polarized fluid untilvoltage is applied. The display is very dense,and various special filters used toprovide colors create even more density.