By-pass circuit and electronic device and display panel using the by-pass circuit

Abstract

The invention discloses a bypass circuit, an electronic device and a display panel which apply the bypass circuit. The bypass circuit can be connected with the electronic element in parallel; wherein, the electronic element is provided with a first end and a second end; the bypass circuit includes a thyristor, a first impedance element and a second impedance element. The thyristor is provided with an anode, a cathode and a gate pole; wherein, the anode is coupled with the first end of the electronic element; the cathode is coupled with the second end of the electronic element; the first impedance element is coupled between the gate pole of the thyristor and the first end of the electronic element; the second impedance element is coupled between the gate pole of the thyristor and the second end of the electronic element. The bypass circuit is adopted for the bypass towards the failure electronic element in the electronic element serial set and enables other electronic elements to operate normally.

Description

technical field [0001] The present invention relates to a design of a protection circuit, and in particular to a circuit design with a bypass function and an electronic device and a display panel using the circuit design to maintain normal operation. Background technique [0002] Liquid crystal display is the mainstream product in the flat panel display market at present, and it mainly uses the backlight provided by the liquid crystal display panel and the backlight module to display images. Most of the early backlight modules used fluorescent tubes as the light source. However, due to their short service life, low power consumption, and easy damage from external forces, they are gradually replaced by Light Emitting Diodes (LEDs). As the light source of the backlight module. [0003] Taking the direct-lit backlight module as an example, a plurality of light-emitting diodes arranged in an array are used to provide a surface light source. Figure 1A and 1B That is to show th...

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Problems solved by technology

[0004] However, if Figure 1B As shown, since the existing structure is to connect the light emitting diodes in series, when one of the light emitting diodes 112' in a certain light emitting diode series 110' fails (such as burns out), it will cause the bar The light emitting diode series 110' is in an open state and cannot operate normally

In other words, the failure of the light emitting diode 112' will cause the other light emitting diodes 112 on the light emitting diode string 110' to be unable to emit light, which will affect the normal display of the liquid crystal display.

[0005] In addition to the backlight module, other devices using LED arrays, such as LED display panels or LED array surface light sources, or electronic devices using other types of electronic component arrays, all have the above-mentioned problems, and cannot effectively improve its reliability

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