Backlight device of LCD (Liquid Crystal Display) broken code screen for intelligent electric meter

Abstract

The utility model provides a backlight device of an LCD (Liquid Crystal Display) broken code screen for an intelligent electric meter, which comprises a light scattering film, the LCD broken code screen, a light shield, a PCB (Printed Circuit Board) and an LED light source array, and is characterized in that the light scattering film is positioned on the back surface of the LCD broken code screen; the PCB is provided with a plurality of LED light source arrays, and the light shield surrounds the LED light source arrays and the light scattering film. According to the utility model, the manufacturing process is low in difficulty, the thickness does not need to be superposed on the broken code screen, and the LED light source is welded on the PCB more simply and conveniently; energy is saved, and the required effect can be effectively achieved without arranging too many light sources; cost is low and flexibility is possessed.

Description

Technical Field

[0001] The utility model relates to the technical field of broken code screens, in particular to a backlight device of an LCD broken code screen for an intelligent electric meter. Background Art

[0002] With the development of technology in the power industry, various types of power meter products are being used more and more widely. Display screens can intuitively provide us with the information we want. LCD screens are a common type of liquid crystal display in smart meters. Its working principle is to output images by controlling the brightness and color of pixels. At the same time, the liquid crystal glass of the LCD screen itself does not have a light-emitting function, and a light source needs to be provided on the back of the liquid crystal. In this way, how to conduct the light source evenly and efficiently has become a design difficulty.

[0003] Currently, existing LCD backlight applications are divided into edge-lit and bottom-lit types according to the different distribution positions of light sources on the liquid crystal screen.

[0004] Side-lit: The light source is set on the side of a specially treated light guide plate, which can be designed into multiple sides according to actual needs.

[0005] Disadvantages: The utilization rate of light source is very low and the display brightness is uneven.

[0006] Bottom backlight: Place the LED light array at the bottom of the screen, and the light source is evenly emitted from the bottom through the diffuser plate and optical module on the surface.

[0007] Disadvantages: The thickness of the bottom-back backlight source is determined by the distance from the light source to the diffuser. Generally, the thicker the thickness, the better the uniformity of the backlight source. At the same time, the multi-layered diffuser and light source increase the difficulty of the manufacturing process of the broken code screen and increase the cost. Summary of the invention

[0008] In order to solve the above problems, the utility model proposes a backlight device for an LCD screen for a smart meter, the device comprising a light-scattering film, an LCD screen, a shading cover, a PCB board, and an LED light source array, the light-scattering film being located on the back of the LCD screen; a plurality of LED light source arrays are arranged on the PCB board, and the shading cover surrounds the LED light source array and the light-scattering film.

[0009] Furthermore, the light-scattering film is attached to the back side of the LCD screen.

[0010] Furthermore, the LED light source array is welded on the PCB board; the LED light source array projects light evenly to the back of the LCD screen through the light diffusion film.

[0011] Furthermore, the light shield is detachably connected to the PCB board to form a closed optical path structure.

[0012] Furthermore, the light shield is detachably connected to the PCB board by means of snaps, screws or magnetic adsorption.

[0013] Furthermore, the LED light source array uses low-power LED lamp beads, and the PCB board is provided with welding points matching the LED light sources, which is convenient for repair or replacement.

[0014] Furthermore, the distance between the LED lamp beads is 3-8 mm.

[0015] Furthermore, the thickness of the light-scattering film is 0.1-0.3 mm, and its surface has a microstructure texture for evenly diffusing light.

[0016] Furthermore, the sunshade is made of a reflective material, and its inner wall has a reflective coating to improve the utilization rate of the light source.

[0017] Furthermore, a dustproof sealing strip is provided on the outer side of the light shield to prevent external dust from entering the optical path space.

[0018] Beneficial effects of the utility model:

[0019] 1. Low manufacturing process difficulty: No need to add thickness to the broken code screen, and it is simpler and more convenient to solder the LED light source on the PCB.

[0020] 2. Energy saving: You don’t need to arrange too many light sources to effectively achieve the desired effect.

[0021] 3. Low cost: All parts are easy to produce.

[0022] 4. Flexibility: extremely low defective rate and convenient rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model has the following drawings:

[0024] Figure 1 The structure diagram of the utility model device;

[0025] Figure 2 Exploded view of the utility model device.

[0026] Among them, 1. LCD broken code screen 2. Diffuser film 3. Sunshade 4. PCB board 5. LED light source. DETAILED DESCRIPTION

[0027] In order to make the purpose, advantages and features of the present invention more obvious, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] Embodiment 1:

[0029] A backlight device for an LCD screen for a smart meter, wherein a light diffusion film 2 is attached to the back of an LCD screen 1, and an LED light source 5 is evenly projected onto the screen through the light diffusion film 2, so that the background of the screen is transformed into a soft, uniform light with uniform brightness. At the same time, a light shield 3 can effectively prevent the scattering of the light source, and through the reflection of the light shield 3, the light source is effectively output in a closed space and finally displayed on the back of the screen, thereby reducing the waste of the light source and achieving the effect of energy saving.

[0030] The LED light source 5 is mounted on the PCB board 4 to facilitate subsequent maintenance and protect the broken code screen from loss; the light shield 3 can effectively prevent the loss of light source and protect the stability of the broken code screen after welding; placing the LED light source 5 on the PCB board 4 can effectively reduce the thickness of the broken code screen.

[0031] Embodiment 2:

[0032] In order to facilitate maintenance and disassembly, the light shield 3 and the PCB board 4 are detachably connected to form a closed optical path structure. The light shield 3 and the PCB board 4 can be detachably connected by means of buckles, screws or magnetic adsorption.

[0033] In order to effectively prevent the loss of light source, the shading hood 3 is made of reflective material, and its inner wall has a reflective coating to improve the utilization rate of light source. A dustproof sealing strip is provided on the outer side of the shading hood 3 to prevent external dust from entering the light path space.

[0034] In order to avoid adding thickness to the broken code screen, it is simpler and more convenient to weld the LED light source 5 on the PCB. The LED light source 5 array uses low-power LED lamp beads, and the PCB board 4 is provided with welding points matching the LED light source, which is convenient for repair or replacement. The spacing between the LED lamp beads is 3-8mm, which can achieve a better lighting effect. The thickness of the diffuser film 2 is 0.1-0.3mm, and its surface has a microstructure texture, which is used to evenly diffuse light without increasing the thickness of the broken code screen.

[0035] The above embodiments describe the technical solution of the present invention in detail. Obviously, the present invention is not limited to the described embodiments. Based on the embodiments in the present invention, people familiar with the technical field can also make various changes accordingly, but any changes that are equivalent or similar to the present invention belong to the scope of protection of the present invention.

[0036] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A backlight device for an LCD screen with a broken code for a smart meter, characterized in that: The device comprises a light-scattering film, an LCD screen, a shading cover, a PCB board, and an LED light source array. The light-scattering film is located on the back of the LCD screen; a plurality of LED light source arrays are arranged on the PCB board, and the shading cover surrounds the LED light source array and the light-scattering film.

2. A backlight device for an LCD screen for a smart meter as claimed in claim 1, characterized in that: The light-scattering film is attached to the back of the LCD screen.

3. A backlight device for an LCD screen for a smart meter as claimed in claim 2, characterized in that: The LED light source array is welded on the PCB board; the LED light source array projects light evenly to the back of the LCD screen through the light diffusion film.

4. A backlight device for an LCD screen for a smart meter as claimed in claim 3, characterized in that: The light shield is detachably connected to the PCB board to form a closed optical path structure.

5. The backlight device of the LCD code screen for smart meter as claimed in claim 4, characterized in that: The light shield is detachably connected to the PCB board by means of buckles, screws or magnetic adsorption.

6. A backlight device for an LCD screen for a smart meter as claimed in claim 4, characterized in that: The LED light source array uses low-power LED lamp beads, and the PCB board is provided with welding points matching the LED light sources, which is convenient for repair or replacement.

7. A backlight device for an LCD screen for a smart meter as claimed in claim 6, characterized in that: The LED lamp beads are spaced 3-8 mm apart.

8. The backlight device of the LCD code-breaking screen for a smart meter as claimed in claim 7, characterized in that: The thickness of the light-scattering film is 0.1-0.3 mm, and its surface has a microstructure texture for evenly diffusing light.

9. A backlight device for an LCD screen for a smart meter as claimed in claim 8, characterized in that: The sunshade is made of a reflective material, and its inner wall has a reflective coating to improve the utilization rate of the light source.

10. The backlight device of the LCD code-breaking screen for smart electric meter as claimed in claim 9, characterized in that: A dustproof sealing strip is arranged on the outer side of the light shield to prevent external dust from entering the optical path space.

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