Liquid Crystal Display Defect Analysis And Repair Method Research

In the panel display liquid crystal display, the use is extremely widespread, the amount of use is very big. Moreover acts according to embarks the equipment the use different demonstration picture size and the picture prime number has the very big difference. From the hand with to the television with the dozens of kinds, is different according to each use request, the liquid crystal board performance also differs from. But along with the liquid-crystal display massive applications, its main primary device - liquid crystal display monitor breakdown gradually is also paid attention by the people, the present paper clump of liquid crystal display monitor common breakdown phenomenon embarks, and unifies the manufacture flow, discusses the defect occurrence principle, phenomenon and the examination method. Emphatically in each kind of not good repair technology, and has conducted the thorough research to the advanced repair method. Achieved reduces the production cost, the promotion productive forces goal.To the liquid crystal display monitor structure, the demonstration principle and the PCB board electric circuit part carries on the analysis. Has carried on the classification to liquid crystal display monitor various undesirable tendency, may induce is three big kind of flaws: In the functionality flaw, the back light source produces each kind not good, array craft Array and becomes each kind which box craft Cell in the flow produces not to be good.And in the composition structure, the circuit design, in the manufacture flow foundation, has carried on the detail analysis to each kind of defects. Has the above defect phenomenon reason to be possible to induce is six kinds: (1) product Array/Cell design issue creates the phantom remains, defect and so on movable -like Mura; (2) slaving voltage question causes partial image sticking defect; (3) in liquid crystal display monitor all manufacture process, because the system regulation parameter (time, temperature, pressure) do not design when causes part Mura.(4) in manufacture process, because the environmental factor causes not to be impure, dustlessness rank does not attain a designated standard, in the environment foreign matter excessively creates flaws and so on luminescent spot, foreign matter; (5) in system regulation because the human factor causes the partial functionality flaw which the back worn out fur woman with no pubic hair foreign matter, the back worn out fur woman with no pubic hair abrasion, the faulty soldered joint cause; (6) reliable question creates the functionality flaw which the tube not good and the PCB panel primary device causes not good.In view of each kind of undesirable tendency, has carried on the elaboration to the complex repair flow. The liquid crystal display monitor breakdown repair technology, (is bonding IC besides the ordinary method, by new material testing), but also has independently designed quite simple, but may enhance the efficiency the small tool, this tool does not have the cost disbursement, simple easy to use, to solve the personnel not easily to distinguish the vertical line origin the question. And laser the repair bright dot in view of the present positive radium the method to conduct the thorough research, laser the positive with the reverse side radium shoots separately after the service image formation, the repair flow carries on the comparison, shot the method take the new radium, the repair bright dot success ratio as 94.85%.Through above research, we may obtain liquid crystal display monitor each kind of not good origin, and carries on the improvement to its repair technology, had achieved saves the service manpower load, enhances the productive forces the goal.