Backlight assembly method for eliminating static electricity of membrane material

Abstract

The invention discloses a backlight assembly method for eliminating static electricity of film materials, which comprises the following steps: S1, before assembly, eliminating static electricity of incoming film materials such as an upper brightness enhancement film, a lower brightness enhancement film, a diffusion film, a reflecting film and a light guide plate by adopting a static electricity eliminator in sequence, so that the static electricity value of the film materials is-20V to + 20V; s2, applying a positive voltage with a voltage value of + aV to the light guide plate by using an electrostatic inverter, applying a positive voltage with a voltage value of + cV to the lower brightness enhancement film, then applying a negative voltage with a voltage value of-bV to the diffusion film, and then applying a negative voltage with a voltage value of-dV to the upper brightness enhancement film; s3, assembling a reflecting film without voltage on a backlight frame, and sequentially attaching a light guide plate, a backlight FPC (Flexible Printed Circuit), a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film which are electrically connected with the electrostatic inverter on the reflecting film; s4, the electrostatic inverter is removed; and S5, the shading glue is attached to the edge of the upper brightness enhancement film. In the steps from S1 to S5, the static electricity eliminator eliminates static electricity of the incoming membrane materials, the static electricity reverser provides positive electricity and negative electricity for the membrane materials, so that the membrane materials are mutually aligned, adsorbed and assembled due to charges of different polarities, the static electricity reverser is removed after assembly is completed, the voltage value of the whole backlight finished product is lower than a certain specification (300 V), current whistling is reduced, and the quality of the backlight finished product is improved. The howling of the display module caused by resonance of the backlight film material is solved, and the functional stability of backlight is ensured.

Description

Technical Field

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

[0002] The mobile phone backlight display module is mainly composed of LENS, optical OCA glue, upper polarizer, TFT panel (LCD liquid crystal display), lower polarizer and 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 when the finger touches the screen or during a call. The TFT panel and the backlight iron shell are two conductive planes, forming a capacitor-like structure (the TFT panel and the backlight iron shell form the upper and lower substrates of the capacitor, and the backlight film material, light guide plate and the air layer in the middle form the dielectric material of the capacitor). When the TFT Panel generates periodic signal electrical changes, the capacitor structure will be charged and discharged. When the static electricity of the film material inside the backlight exceeds a certain specification, the film material will vibrate periodically, thereby generating a howling sound. The display module will emit a "squeaking" current howling sound, and functional problems will occur, affecting user use. Summary of the invention

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

[0004] The objective of the present invention is achieved through the following technical solutions:

[0005] A backlight assembly method for eliminating static electricity of film materials, comprising:

[0006] Step S1: Before assembly, static eliminators are used to eliminate static electricity from the upper brightness enhancement film, the lower brightness enhancement film, the diffusion film, the reflective film, the light guide plate and other incoming film materials, so that the static electricity value of the film materials is -20V to +20V;

[0007] Step S2: using 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 assembling a non-voltage reflective film on a backlight frame, and then sequentially attaching a light guide plate electrically connected to the electrostatic inverter, a backlight FPC, a diffusion film, a lower brightness enhancement film, and an upper brightness enhancement film on the reflective film;

[0009] Step S4: removing the electrostatic inverter;

[0010] Step S5: attaching light-shielding adhesive to the edge of the upper brightness enhancement film.

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

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

[0013] In one embodiment, the color of the light-shielding glue is black.

[0014] In one of the embodiments, an LED light source is welded on the backlight FPC, and the light source direction of the LED light source is toward the light guide plate.

[0015] In one of the embodiments, the lamp 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 the lamp beads is 8.

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

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

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

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

[0021] The backlight assembly method for eliminating static electricity of film materials of the present invention is provided by setting steps S1 to S5. The static eliminator eliminates static electricity of the incoming film materials, and the static reversal device provides positive and negative charges to the film materials, so that the film materials are mutually adsorbed and assembled due to opposite charges. After the assembly is completed, the static reversal device is removed, so that the voltage value on the overall backlight product is lower than a certain specification (300V), reducing the current whistling sound, solving the whistling sound of the display module caused by the resonance of the backlight film materials, and ensuring the functional stability of the backlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0023] Figure 1 The figure is a flow chart of a backlight assembly method for eliminating static electricity of film materials in one embodiment of the present invention. DETAILED DESCRIPTION

[0024] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings.

[0025] The present application proposes a backlight assembly method for eliminating static electricity of film materials, comprising:

[0026] Step S1: Before assembly, use an electrostatic eliminator to eliminate static electricity on the incoming film materials such as the upper light-enhancing film, the lower light-enhancing film, the diffusion film, the reflective film and the light guide plate, so that the static electricity value of the film material 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 light-enhancing film, a negative voltage of -bV to the diffusion film, and then a negative voltage of -dV to the upper light-enhancing film. The electrostatic inverter can achieve uniform positive or negative charge on the film material, so that the upper light-enhancing film, the lower light-enhancing film, the diffusion film and the light guide plate attract each other through opposite charges, and then the upper light-enhancing film, the lower light-enhancing film, the diffusion film and the light guide plate are aligned and adsorbed.

[0027] Step S3: first assemble a non-voltage reflective film on the backlight frame, and then sequentially attach a light guide plate electrically connected to the electrostatic inverter, a backlight FPC, a diffusion film, a lower brightness enhancement film and an upper brightness enhancement film on the reflective film.

[0028] Step S4: removing the electrostatic inverter.

[0029] Step S5: attaching light-shielding adhesive to the edge of the upper brightness enhancement film.

[0030] The backlight assembly method for eliminating static electricity of film materials of the present application is provided by setting steps S1 to S5. The static eliminator eliminates static electricity of the incoming film materials, and the static reversal device provides positive and negative charges to film materials such as the upper brightness enhancement film, the lower brightness enhancement film, the diffusion film and the light guide plate, so that the film materials are mutually adsorbed and assembled due to the opposite charges. After the assembly is completed, the static reversal device is removed, so that the voltage value on the overall backlight product is lower than a certain specification (300V), thereby reducing the current whistling sound, solving the whistling sound of the display module caused by the resonance of the backlight film material, and ensuring the functional stability of the backlight.

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

[0032] Preferably, the voltage values ​​of a, b, c and d are all 2KV, so that the overall electrostatic value of the assembled backlight product is 0V, and the color of the light-shielding glue is black. Black has better light absorption. Black can absorb all colors of light without reflecting any color of light, which makes the black light-shielding glue appear darker visually. This characteristic enables the black light-shielding glue to effectively block the light from passing through, thereby achieving the effect of light shielding. In addition, the material of the black light-shielding glue usually has good light-shielding performance, which can effectively prevent light from leaking out from the gaps between components. This light-shielding performance is very important for maintaining the optical performance of the display module, because light leakage may cause problems such as image quality degradation, contrast reduction and color distortion. In practical applications, black light-shielding glue plays an important role in the assembly of lens lenses, which can improve image quality, contrast, reduce noise, and protect electronic components. It achieves the light-shielding effect by absorbing light instead of reflecting light, thereby reducing the reflection and scattering of light inside the display module and improving the contrast and clarity of the image.

[0033] In one embodiment, an LED light source is welded on the backlight FPC, and the light source direction of the LED light source faces 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 effects.

[0034] Furthermore, the lamp beads in the LED light source are arranged at equal intervals on the side of the backlight frame, further enhancing the uniform light effect of the LED light source. Preferably, the number of the lamp beads is 8.

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

[0036] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.

Claims

1. A backlight assembly method for eliminating static electricity of film materials, characterized in that: include: Step S1: Before assembly, static eliminators are used to eliminate static electricity from the upper brightness enhancement film, the lower brightness enhancement film, the diffusion film, the reflective film, the light guide plate and other incoming film materials, so that the static electricity value of the film materials is -20V to +20V; Step S2: using 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 assembling a non-voltage reflective film on a backlight frame, and then sequentially attaching a light guide plate electrically connected to the electrostatic inverter, a backlight FPC, a diffusion film, a lower brightness enhancement film, and an upper brightness enhancement film on the reflective film; Step S4: removing the electrostatic inverter; Step S5: attaching light-shielding adhesive to the edge of the upper brightness enhancement film.

2. The backlight assembly method for eliminating static electricity of film materials according to claim 1, characterized in that: The voltage values ​​of a, c and d are less than 3KV, the voltage value of b is less than 2KV, and the voltage value of the overall backlight after assembly is less than 300V.

3. The backlight assembly method for eliminating static electricity of film materials 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 of film materials according to claim 1, characterized in that: The color of the light-shielding glue is black.

5. The backlight assembly method for eliminating static electricity of film materials according to claim 1, characterized in that: An LED light source is welded on the backlight FPC, and the light source direction of the LED light source faces the light guide plate.

6. The backlight assembly method for eliminating static electricity of film materials according to claim 5, characterized in that: The lamp 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 of film materials according to claim 6, characterized in that: The number of the lamp beads is 8.

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

9. The backlight assembly method for eliminating static electricity of film materials according to claim 1, characterized in that: The backlight frame is made of iron or rubber.

10. The backlight assembly method for eliminating static electricity of film materials according to claim 1, characterized in that: The static eliminator is an ion blower.

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