Backlight assembly method for eliminating static electricity of film

Abstract

The application discloses a backlight assembly method for eliminating static electricity of film materials, and comprises the following steps: S1, before assembly, static electricity of incoming film materials, such as upper brightness enhancement film, lower brightness enhancement film, diffusion film, reflective film and light guide plate, is eliminated by using an electrostatic eliminator in sequence, so that the static electricity value of the film materials is-20V to +20V; S2, a positive voltage with a voltage value of +aV is added to the light guide plate by using an electrostatic inverter, a positive voltage with a voltage value of +cV is added to the lower brightness enhancement film, a negative voltage with a voltage value of -bV is added to the diffusion film, and a negative voltage with a voltage value of -dV is added to the upper brightness enhancement film; S3, the reflective film without voltage is assembled on a backlight frame, and the light guide plate, backlight FPC, diffusion film, lower brightness enhancement film and upper brightness enhancement film electrically connected with the electrostatic inverter are attached to the reflective film in sequence; S4, the electrostatic inverter is removed; and S5, shading glue is attached to the edge of the upper brightness enhancement film. In steps S1 to S5, the electrostatic eliminator eliminates static electricity of the incoming film materials, and the electrostatic inverter provides positive and negative electricity to the film materials, so that the film materials are assembled by mutual adsorption due to opposite charges, the electrostatic inverter is removed after assembly, the voltage value on the whole backlight product is lower than a certain specification (300V), current howling sound is reduced, howling sound generated by resonance of the display module due to the backlight film materials is solved, and the functional stability of the backlight is ensured.

Description

Technical Field

[0001] This invention relates to the field of backlighting, and in particular to a backlight assembly method for eliminating static electricity in film materials. Background Technology

[0002] The mobile phone backlight display module mainly consists of lenses, optical OCA adhesive, an upper polarizer, a TFT panel (LCD liquid crystal display), a lower polarizer, and the backlight module. When the static electricity of the film material inside the backlight module exceeds a certain specification, the TFT panel will generate a fixed frequency touch scan during screen touch or call. The TFT panel and the backlight casing are two conductive planes, forming a capacitor-like structure (the TFT panel and backlight casing form the upper and lower substrates of the capacitor, while the backlight film, light guide plate, and the air layer in between form the dielectric material of the capacitor). When the TFT panel generates periodic signal electrical changes, it will charge and discharge this capacitor structure. When the static electricity of the film material inside the backlight exceeds a certain specification, the film material will vibrate periodically, producing a whistling sound. A "squeaking" current whistling sound can be heard from the display module, causing functional problems and affecting user experience. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a backlight assembly method for eliminating static electricity in film materials.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A backlight assembly method for eliminating static electricity in membrane materials, comprising:

[0006] Step S1: Before assembly, static electricity is eliminated from the incoming film materials such as the upper brightness enhancement film, lower brightness enhancement film, diffusion film, reflective film and light guide plate by using an electrostatic eliminator, so that the static electricity value of the film materials is -20V to +20V.

[0007] Step S2: Use an electrostatic inverter to apply a positive voltage of +aV to the light guide plate, a positive voltage of +cV to the lower brightness enhancement film, a negative voltage of -bV to the diffusion film, and a negative voltage of -dV to the upper brightness enhancement film.

[0008] Step S3: First, assemble the unvoltageed reflective film onto the backlight frame, and then attach the light guide plate, backlight FPC, diffusion film, lower brightness enhancement film and upper brightness enhancement film, which are electrically connected to the electrostatic inverter, onto the reflective film in sequence.

[0009] Step S4: Remove the electrostatic inverter;

[0010] Step S5: Apply the light-blocking adhesive to the edge of the upper light-enhancing film.

[0011] In one embodiment, the voltage values ​​of a, c, and d are <3KV, the voltage value of b is <2KV, and the voltage value of the assembled overall backlight is <300V.

[0012] In one embodiment, the voltage values ​​of a, b, c, and d are all 2KV.

[0013] In one embodiment, the light-shielding adhesive is black.

[0014] In one embodiment, an LED light source is soldered onto the backlight FPC, and the light source direction of the LED light source is towards the light guide plate.

[0015] In one embodiment, the LED beads in the LED light source are arranged at equal intervals on the side of the backlight frame.

[0016] In one embodiment, the number of LED beads is 8.

[0017] In one embodiment, the electrostatic value of the membrane material in step S1 is 0V.

[0018] In one embodiment, the backlight frame is made of iron or glue.

[0019] In one embodiment, the static eliminator is an ion fan.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] The backlight assembly method for eliminating static electricity in film materials of the present invention includes steps S1 to S5. An electrostatic eliminator eliminates static electricity in the incoming film material, and an electrostatic reversing device provides positive and negative charges to the film material, causing the film materials to align and adsorb with each other due to opposite charges. After assembly, the electrostatic reversing device is removed, so that the voltage value on the overall backlight product is lower than a certain specification (300V), reducing current howling noise, solving the howling noise caused by the resonance of the backlight film material in the display module, and ensuring the functional stability of the backlight. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below.

[0023] Figure 1 This is a schematic flowchart of a backlight assembly method for eliminating static electricity in a film material according to an embodiment of the present invention. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings.

[0025] This application proposes a backlight assembly method for eliminating static electricity in membrane materials, including:

[0026] Step S1: Before assembly, static electricity is eliminated from the incoming film materials, including the upper brightness enhancement film, lower brightness enhancement film, diffusion film, reflective film, and light guide plate, using an electrostatic eliminator to reduce the static electricity value of the film materials to -20V to +20V. Step S2: An electrostatic inverter is used to apply a positive voltage of +aV to the light guide plate, a positive voltage of +cV to the lower brightness enhancement film, a negative voltage of -bV to the diffusion film, and a negative voltage of -dV to the upper brightness enhancement film. The electrostatic inverter can uniformly apply positive or negative charges to the film materials, causing the upper brightness enhancement film, lower brightness enhancement film, diffusion film, and light guide plate to attract each other through opposite charges, resulting in alignment and adsorption between them.

[0027] Step S3: First, assemble the unvoltageed reflective film onto the backlight frame, and then attach the light guide plate, backlight FPC, diffusion film, lower brightness enhancement film and upper brightness enhancement film to the reflective film in sequence.

[0028] Step S4: Remove the electrostatic inverter.

[0029] Step S5: Apply the light-blocking adhesive to the edge of the upper light-enhancing film.

[0030] The backlight assembly method for eliminating static electricity in film materials in this application involves setting steps S1 to S5. An electrostatic eliminator eliminates static electricity from the incoming film materials, and an electrostatic reversing device provides positive and negative charges to the film materials such as the upper brightness enhancement film, lower brightness enhancement film, diffusion film, and light guide plate, so that the film materials are aligned and adsorbed to each other due to opposite charges. After assembly, the electrostatic reversing device is removed, so that the voltage value on the overall backlight finished product is lower than a certain specification (300V), reducing current howling noise, solving the howling noise caused by the resonance of the backlight film material in the display module, and ensuring the functional stability of the backlight.

[0031] In one embodiment, the voltage values ​​of a, c, and d are <3KV, and the voltage value of b is <2KV, so that the voltage value of the assembled backlight is <300V, thereby controlling the electrostatic discharge value of the finished backlight product.

[0032] Preferably, the voltage values ​​of a, b, c, and d are all 2KV, resulting in an overall electrostatic value of 0V for the assembled backlight assembly. The color of the light-shielding adhesive is black. Black has excellent light absorption properties; it absorbs all colors of light without reflecting any, making it appear darker. This characteristic allows the black light-shielding adhesive to effectively block light transmission, thus achieving a light-shielding effect. Furthermore, the material of the black light-shielding adhesive typically possesses excellent light-shielding properties, effectively preventing light leakage from gaps between components. This light-shielding performance is crucial for maintaining the optical performance of the display module, as light leakage can lead to problems such as decreased image quality, reduced contrast, and color distortion. In practical applications, black light-shielding adhesive plays an important role in lens assembly, improving image quality and contrast, reducing noise, and protecting electronic components. It achieves its light-shielding effect by absorbing rather than reflecting light, thereby reducing light reflection and scattering within the display module and improving image contrast and clarity.

[0033] In one embodiment, an LED light source is soldered onto the backlight FPC, and the light source direction of the LED light source is towards the light guide plate, so that the point light source on the LED light source is converted into a surface light source, thereby enhancing the uniformity of light and improving the uniformity of optical effect.

[0034] Furthermore, the LED chips in the LED light source are evenly spaced on the sides of the backlight frame to further enhance the uniformity of the LED light source's luminous efficacy. Preferably, the number of LED chips is 8.

[0035] In one embodiment, the static eliminator is an ion fan. The ion fan generates positive and negative ions through a high-voltage power supply and uses a fan to blow the ions onto the surface of the film material to neutralize and eliminate static electricity on the film material surface, reducing the static electricity of the film material to -20V to 20V. Furthermore, the static electricity value in the film material treated by the static eliminator in step S1 is 0V, further reducing the static electricity value in the film material, thereby suppressing the howling of the display module. In addition, the backlight frame is made of iron or adhesive.

[0036] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A backlight assembly method for eliminating static electricity in membrane materials, characterized in that, include: Step S1: Before assembly, static electricity is eliminated from the incoming film materials such as the upper brightness enhancement film, lower brightness enhancement film, diffusion film, reflective film and light guide plate by using an electrostatic eliminator, so that the static electricity value of the film materials is -20V to +20V. Step S2: Use an electrostatic inverter to apply a positive voltage of +aV to the light guide plate, a positive voltage of +cV to the lower brightness enhancement film, a negative voltage of -bV to the diffusion film, and a negative voltage of -dV to the upper brightness enhancement film. Step S3: First, assemble the unvoltageed reflective film onto the backlight frame, and then attach the light guide plate, backlight FPC, diffusion film, lower brightness enhancement film and upper brightness enhancement film, which are electrically connected to the electrostatic inverter, onto the reflective film in sequence. Step S4: Remove the electrostatic inverter; Step S5: Apply the light-blocking adhesive to the edge of the upper light-enhancing film.

2. The backlight assembly method for eliminating static electricity in the membrane material according to claim 1, characterized in that, The voltage values ​​of a, c, and d are <3KV, the voltage value of b is <2KV, and the voltage value of the assembled backlight is <300V.

3. The backlight assembly method for eliminating static electricity in the membrane material according to claim 2, characterized in that, The voltage values ​​of a, b, c, and d are all 2KV.

4. The backlight assembly method for eliminating static electricity in the membrane material according to claim 1, characterized in that, The color of the light-blocking adhesive is black.

5. The backlight assembly method for eliminating static electricity in the membrane material according to claim 1, characterized in that, An LED light source is soldered onto the backlight FPC, and the light source of the LED light source is oriented towards the light guide plate.

6. The backlight assembly method for eliminating static electricity in the membrane material according to claim 5, characterized in that, The LED beads in the LED light source are arranged at equal intervals on the side of the backlight frame.

7. The backlight assembly method for eliminating static electricity in the membrane material according to claim 6, characterized in that, The number of LED beads is 8.

8. The backlight assembly method for eliminating static electricity in the membrane material according to claim 1, characterized in that, The electrostatic value of the membrane material in step S1 is 0V.

9. The backlight assembly method for eliminating static electricity in the membrane material according to claim 1, characterized in that, The backlight frame is made of iron or plastic.

10. The backlight assembly method for eliminating static electricity in the film material according to claim 1, characterized in that, The static eliminator is an ion fan.

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