Switching FPC (Flexible Printed Circuit) for regulating and controlling backlight current through hardware circuit

Abstract

The utility model discloses a switching FPC (Flexible Printed Circuit) for regulating backlight current through a hardware circuit, which comprises a switching FPC body, the switching FPC body comprises a first interface, a second interface and a backlight driving circuit, the backlight driving circuit comprises a regulating unit, the regulating unit comprises a plurality of resistors arranged in parallel, and the resistors are connected with the first interface, the second interface and the backlight driving circuit. The regulation and control unit is used for regulating and controlling backlight driving current, and a reserved mounting position for setting a resistor of the regulation and control unit is reserved on the switching FPC body. According to the utility model, the backlight driving circuit is conveniently adjusted by adjusting the regulation and control unit, the backlight galvanometer is regulated and controlled through a hardware circuit, the lightening verification result is closer to the verification requirement of a client terminal, and the backlight galvanometer has the advantages of low cost and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, and in particular to a switching FPC for regulating backlight current through a hardware circuit. Background Art

[0002] In the existing mobile phone module solution, the module factory will design the corresponding module model transfer FPC to light up the product after the module is assembled to verify whether the display screen and brightness are OK. The module brightness is related to the backlight brightness, and whether the backlight current reaches the set value directly determines the backlight brightness. Usually, in order to adapt to most projects, the module factory automatically adjusts the backlight current through software on the mainboard. For example, if the total backlight current is set to 60mA and divided into 3 channels, the software automatically adjusts it to 20mA per channel. In this case, the module factory can be directly connected to the module factory mainboard through the transfer FPC designed by the module factory to power the module. However, the backlight driver chip used in the mainboard of some customers is relatively special, and the size of the backlight current needs to be controlled by hardware. Usually Customers will request to connect a small resistor to the negative pole of the FPC backlight of the module. If this happens, because a small resistor is connected to the negative pole of the backlight, the negative pole of the backlight is close to the ground. The current motherboard design of the module factory cannot automatically adjust the current, which will cause the backlight current to be too large and burn out the backlight. At the same time, the expected verification effect cannot be achieved. In order for the module factory's motherboard to adapt to the customer's screen requirements, this part of the hardware circuit needs to be designed on the transfer FPC according to the backlight chip of the customer's motherboard. The screen requirements of the customer's motherboard need to be simulated to light up the module normally. When facing the lighting requirements of different types of backlight modules, due to different resistance requirements, if the transfer FPC needs to be redesigned and produced each time, it will take a long time and cost a lot.

[0003] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a switching FPC which can regulate the backlight current through a hardware circuit.

[0005] The technical solution of the utility model is as follows: The utility model provides a switching FPC for regulating backlight current through a hardware circuit, including: a switching FPC body, the switching FPC body including a first interface, a second interface and a backlight driving circuit, the backlight driving circuit including a control unit, the control unit including a plurality of resistors arranged in parallel, the control unit being used to regulate the backlight driving current, and a reserved installation position for setting the resistor of the control unit being reserved on the switching FPC body.

[0006] Furthermore, a plug-in interface is provided on the transfer FPC body, and the control unit is arranged on the transfer FPC body by plugging.

[0007] By adopting the above scheme, the beneficial effect of the utility model is that it is convenient to adjust the backlight driving circuit by adjusting the control unit, and realize the control of the backlight ammeter by the hardware circuit, so that the lighting verification result is closer to the verification requirement of the customer terminal, and has the advantages of low cost and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] Figure 2 This is a circuit diagram of the first interface of the first embodiment of the utility model.

[0010] Figure 3 This is a circuit diagram of the second interface of the first embodiment of the utility model.

[0011] Figure 4 FIG. 4 is a circuit diagram of a backlight driving circuit according to a first embodiment of the present utility model. DETAILED DESCRIPTION

[0012] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0013] Please refer to Figures 1 to 4 In this embodiment, the utility model provides a switching FPC for regulating the backlight current through a hardware circuit, including: a switching FPC body, the switching FPC body including a first interface 2, a second interface 1 and a backlight driving circuit 3, the backlight driving circuit 3 including a control unit 31, the control unit 31 including a plurality of resistors arranged in parallel, the control unit 31 being used to regulate the backlight driving current, and a reserved installation position for setting the resistor of the control unit 31 is reserved on the switching FPC body. In this solution, the backlight driving circuit 3 is partially configured as a type with an adjustable control unit 31, and a mounting position for setting the resistor of the control unit 31 is reserved on the switching FPC body. When facing backlight modules with different current requirements, it is only necessary to set (for example, by welding) a resistor of a corresponding resistance value on the mounting position of the switching FPC body, that is, the backlight driving current can be changed by changing the resistance value through the control unit 3. For example, please refer to Figures 2 to 4Circuit diagram, in this embodiment, the backlight driving circuit is connected to the first interface MIPI V9 and the second interface J38-1, the backlight driving circuit includes a control unit 31, the control unit includes a resistor R4, a resistor R5, and a resistor R6, and a reserved installation position for at least one of the resistors R4, R5, and R6 can be reserved on the transfer FPC body. When the resistance value needs to be adjusted in the face of different types of backlight modules, a resistor with a corresponding resistance value can be set on the reserved installation position, so that the grounding resistance of the first pin of the backlight driving chip U1 (the model of this embodiment is AW9962EDNR) changes, thereby changing the backlight current.

[0014] In other embodiments of the present scheme, the regulating unit may be arranged in the form of: a plug-in interface is provided on the adapter FPC body, and the regulating unit is arranged on the adapter FPC body by plugging. In this way, the entire regulating unit can be quickly replaced.

[0015] In summary, the beneficial effects of this solution are: it is convenient to adjust the backlight driving circuit by adjusting the control unit, and to control the backlight ammeter through the hardware circuit, so that the lighting verification result is closer to the verification requirements of the customer terminal, and it has the advantages of low cost and high efficiency.

[0016] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A switching FPC for regulating backlight current through a hardware circuit, characterized in that: include: The adapter FPC body includes a first interface, a second interface and a backlight driving circuit. The backlight driving circuit includes a control unit. The control unit includes a plurality of resistors arranged in parallel. The control unit is used to control the backlight driving current. A reserved mounting position for setting the resistors of the control unit is reserved on the adapter FPC body.

2. The switching FPC for regulating backlight current by hardware circuit according to claim 1, characterized in that: The transfer FPC body is provided with a plug-in interface, and the control unit is arranged on the transfer FPC body by plugging.

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