CN200986577Y

CN200986577Y - LED leakage current detecting device

Info

Publication number: CN200986577Y
Application number: CN 200620015855
Authority: CN
Inventors: 封舸; 张长江
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-11-20
Filing date: 2006-11-20
Publication date: 2007-12-05
Anticipated expiration: 2016-11-20

Abstract

The utility model discloses a LED current-leakage detecting device including detected LEDs. The utility model is characterized in that each detected LED is connected in series with a pointer multimeter to compose a loop and a plurality of LEDs and pointer multimeters compose loops and connect together in parallel. Compared with the prior art, the utility model detects LED by means of an inductive magnetic field and the accuracy can reach 0.0001 Mu A, while the existing detector can only reach 0.1 Mu A. The utility model can pick out all the leaky LEDs through a LED current-leakage detecting device so as to minish the possibility of dead lamp, dark light, and scintillation of the LED in use and improve the LED stability.

Description

The LED leak current detection device

Technical field

The utility model relates to a kind of LED leak current detection device.

Background technology

What the known LED leak current detection device of existing market generally adopted is Computerized tester, the structure of this detector mainly is made of computing machine and test board, test board is connected with computing machine, once can push down 20 LEDs on row's support, microcontroller core chip by built-in computer, A/D and D/A conversion chip, constant current and constant voltage circuit image data, the voltage and current of control and detection LED changes, with WINDOWS is the technical parameter of platform reflection LED, and this device has the LED forward voltage (VF) of detection, inverse current (IR), thyristor, several functions of normal luminous intensity (IV).

Above-mentioned prior art is the variation by electric current and voltage, convert digital signal to by sample of signal, its defective mainly is that error is big, can only detect obviously bad LED, and LED distinct issues in practice are because slight electric leakage (promptly relatively strict to this parameter request of IR) is arranged, and wild effects such as dead lamp, half-light, flicker will occur.

The utility model content

The purpose of this utility model is at the deficiencies in the prior art, a kind of LED leak current detection device is provided, the utility model can overcome the defective of prior art, under the prerequisite that does not reduce the LED testing efficiency, improve the inverse current test accuracy, LED all can choose like clockwork regardless of the degree of leaking electricity.

The technical solution of the utility model is as described below: the LED leak current detection device, comprise detected LED, it is characterized in that each detected LED all connects with a pointer multimeter and constitutes the loop, several LED and pointer multimeter are connected in parallel after constituting the loop each other.

The utility model is set in suitable resistance (for example 10K Ω) with pointer multimeter, again multimeter is connected with the both positive and negative polarity of LED, the pointer of multimeter will show the resistance of LED, resistance is big more, LED is with regard to leakproof or leak electricity little, otherwise resistance is more little, and the electric leakage of LED is just big more, by the fraction defective of above structure detection LED leakage current.

Compared with prior art, the utility model is tested LED by induced field, degree of accuracy can reach 0.0001uA, and existing pick-up unit can only reach 0.1uA, the utility model is by the LED leakage detector, can will exist the LED of electric leakage all to sort out exactly, the possibility that makes LED phenomenons such as dead lamp, half-light, flicker occur in practice greatly reduces (being generally in the per mille), has improved the stability of LED.

Description of drawings

Below in conjunction with the drawings and the specific embodiments the utility model is described in detail.

Accompanying drawing 1 is the utility model line connecting relation structural drawing.

LED in the drawings, 1; 2, lead; 3, pointer multimeter

Embodiment

In conjunction with the accompanying drawings, LED leak current detection device of the present utility model, comprise detected LED1, it is characterized in that, each detected LED1 all connects with a pointer multimeter 3 by lead 2 and constitutes the loop, several LED1 and in parallel as required fitting together (this parallel way is a known technology, does not express among the figure) after pointer multimeter 3 constitutes the loop each other.

Can 20 one rows such as detected LED, be connected in parallel on the silver-plated retort stand, the utility model is combined into a rectangular parallelepiped and fixing with 20 multimeters by 5 * 4 or 4 * 5, the circuit unification of 20 multimeters is connected one above the test board, pass through test board, once just can test 20 LEDs, 20 multimeters reflect respectively by the amplitude of fluctuation of pointer and the resistance of 20 LEDs embody the different electric leakage situation of 20 LEDs.

Claims

1, a kind of LED leak current detection device, comprise detected LED, it is characterized in that each detected LED all connects with a pointer multimeter by lead and constitutes the loop, several LED and in parallel as required fitting together after pointer multimeter constitutes the loop each other.