Light-emitting rectification chip

Abstract

A light-emitting rectification chip comprises a substrate, a direct current output end positive electrode, a direct current output end negative electrode, input ends of first to Nth pairs of alternating currents, a light-emitting film, a transparent conducting layer and a transparent insulating layer, wherein N is greater than or equal to one, and the light-emitting film comprises a first kind of conducting layer, a light-emitting layer and a second kind of conducting layer which are sequentially formed on the substrate. In correspondence to each pair of input alternating currents, the light-emitting film is segmented into four series-connection unit chip groups which are isolated from one another; in correspondence to the Nth pair of alternating currents, the series-connection unit chip groups comprise the series-connection unit chip group (4N-3), the series-connection unit chip group (4N-2), the series-connection unit chip group (4N-2) and the series-connection unit chip group (4N); in correspondence to N pairs of input alternating currents, 4*N series-connection unit chip groups are formed. The direct current output end positive electrode, the direct current output end negative electrode, the input ends of the first to Nth pairs of alternating currents and the 4*N series-connection unit chip groups are electrically connected with one another, so that the N input alternating currents are respectively rectified and superimposed so as to output a total direct current, the utilization rate of the light emitting area of chips is increased, stroboflash is lowered, and efficiency is improved.

Description

technical field [0001] The invention relates to an LED and OLED light-emitting rectification chip for reducing AC flicker applied to lighting. Background technique [0002] One of the ways to reduce the cost of LED and OLED lighting fixtures is to use AC current drive. At the chip level, the proposed AC LED chip solutions include: [0003] 1. The AC LED chip solution of III-N Technology Company (US patent application: 11 / 109602): On one LED chip, two series of DC LED unit chips are formed, and then connected in reverse parallel; the positive half of the AC current is along a The DC LED unit chips connected in series flow, only one string of LED unit chips emits light, the negative half cycle of the AC current flows along the other string of DC LED unit chips, and the other string of LED unit chips emits light. The light emitting area utilization rate of the chip is 50%. [0004] 2. The AC LED chip solution of ITRI and Epistar (Chinese patent: ZL200820178947.1): multiple u...

AI Technical Summary

Problems solved by technology

[0007] (1) When applying AC LED chips to lamps, whether multiple AC LED chips are used in parallel or in series, the rectification function will be repeated, that is, the light-emitting area of ​​the chip will be wasted

The utilization rate of the light-emitting area of ​​the overall LED chip of a lamp composed of a plurality of the above-mentioned AC LED chips is low, about 50% to 75%; (2) there is strobe; (3) the voltage of the driving AC current is lower than that of the AC LED When the critical voltage of the chip is low, the AC LED chip does not emit light, and the efficiency is low; (4) When the voltage of the driven DC current is lower than the critical voltage of a string of unit chips of the AC LED chip as a load, the AC LED chip as a load A string of unit chips does not emit light and is less efficient

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