Lighting stick with LBD wafer

Abstract

This invention relates to one light bar with light diode transistor, which comprises long bar shape frame, circuit board, several light diode transistor, wherein, the frame top part has level concaved tank and down part with several vertical holes with each hole connected to concaved tank bottom; the circuit board top surface is paved with cathode weld board with several holes relative to the vertical holes; the circuit board has several anode weld panel each weld disc exposed by cathode weld board; the frame bottom is fixed to the cathode board with each diode transistor imbedded into vertical hole of frame.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and relates to a luminous rod, in particular to a luminous rod composed of light-emitting diodes. The luminous rod can be used as a liquid crystal backlight source or a projection light source, and can also be used for illumination. Background technique [0002] Commonly used backlights for computers and TV LCD screens include cold cathode fluorescent lamps, electroluminescence, and light sticks. [0003] The structure of the existing luminous rod is: a plurality of light-emitting diodes are arranged at intervals on a strip-shaped circuit board, each light-emitting diode is composed of a housing and a light-emitting diode chip packaged in the housing, and the positive and negative sides of the light-emitting diode chip The terminal welding wires are connected with the pins at both ends of the shell, and the pins are soldered on the circuit board with tin, and there is an aluminum substrat...

AI Technical Summary

Problems solved by technology

[0004] 1. The heat dissipation area is small: the heat is dissipated by a piece of aluminum substrate under the circuit board, and the heat of the light-emitting diode is mainly generated by its negative terminal. The heat must first pass through the circuit board to be transmitted to the aluminum substrate, and the circuit board itself will block the flow of heat. Conduction, poor cooling effect

[0005] 2. Poor light concentrating effect: each light emitting diode can be regarded as a point light source, and the light emitted by it includes side light and scattered light, which cannot be converged, which reduces the brightness of the light stick, and must be compensated by increasing the number of light emitting diodes Lack of brightness

[0006] 3. Short length: relying only on the support of the sheet-shaped aluminum substrate, the structural strength is poor, and it is easy to bend and deform. The light-emitting stick cannot be made very long, and it is difficult to industrialize large-scale production

[0007] 4. The positive and negative terminal welding wires of the light-emitting diode chip are connected to the pins at both ends of the housing. The positive and negative terminal welding wires are very thin gold wires with low thermal impedance, and the pins play the role of supporting the housing. It is a relatively thick aluminum strip, the pins are welded on the circuit board with tin, the solder joints are very large, the thermal impedance of the junction between the pins and the solder joints is high, and it is easy to generate heat, which will have an adverse effect on the light stick

[0008] Exactly because of the above reasons, the existing luminous sticks are not generally adopted, and the market share is less than 10%.

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