- Each of the four schemes has its own characteristics. I believe your device will choose one of these schemes. Make your product shine like a star in the market
Long Life
Uniform Brightness
Diverse Colors
How to make your Membrane Switch work in the dark?
Bringing Your Own Light Source
Resin Dome design can be selected
Can choose Silicone Rubber Keypad as Overlay material
Different Colors of Leds Can Be Selected to Light Up the Illuminated Area
"Take you through four different Backligting Soulution"
- Quality products from niceone keypad
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What are the options for BACKLIGHT SOLUTION? And how does each work?
- Light Guide Film(LGF): Light Guide Film is a technology that uses metering LEDs and light guide plates to illuminate the area to be illuminated. A simple metering light source cannot evenly illuminate the area to be illuminated. The light source can enhance the light through the refraction of the light guide plate. The material of the light guide plate is light guide ink and PC.
- Light Emitting Diodes (LED): Simply use LEDs as light sources without light guide plates. Often used to illuminate a small area.
- Electroluminescent (EL) Lighting: Also called EL sheet, a type of physical luminescence phenomenon that directly converts electrical energy into light energy through high voltage and high frequency. By applying an alternating voltage between the two electrodes of the EL device, and at a certain frequency, the electric field excites the luminescent material to generate light to illuminate the illuminated area.
- Fiber Optic Lighting: Use light guide materials composed of optical fiber cloth, and use a plastic shell at the end of the wire to concentrate them at one point, and use LEDs to conduct the light source behind the optical fiber line to illuminate the illuminated area.
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Features of Light Guide Film (LGF):
- The thickness is thinner -0.2-0.5mm to choose from.
- The function loss is very low: the minimum can use 2.5V and 20ma to start the light source.
- The life span is up to 10,000 hours without any influence on the brightness.
- The brightness is very uniform.
- Different colors of LEDs can be selected to light up the illuminated area, and the colors are more diverse.
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Features of Light Emitting Diodes (LED):
- Compared with the other three designs, it is more cost-effective.
- More combined with Silicone Rubber Keypad.
- Different colors of LEDs can be selected to light up the illuminated area, with more colors.
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Features of Electroluminescent (EL) Lighting:
- The brightness is very uniform and can illuminate the area to be illuminated in a large area.
- Very thin, when used as a fixed layer.
- Suitable for low-level and irrelevant areas that are not always open.
- The life span is only 2-3,000h, depending on the quality of the phosphor.
- The color is relatively single. Not many colors available.
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Fiber Optic Lighting: Features
- Life is up to 10,000H.
- Very low functional loss: the lowest possible use of 2.5V and 5ma to start the light source.
- The color is relatively single. The color depends on the color of the LEDs.
- Can withstand extreme temperatures and humidity.
- The brightness is very uniform, and can illuminate a large area to be illuminated.
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The design direction of the Backlight Membrane Switch.
As one of the most popular HMI products in recent years, Backlight Membrane Switch must be impressed by everyone. Whether users, engineers, etc. have a deeper understanding of such products. So let the Niceone-Keypad engineering team introduce some of the features and functions of Backlight today.
Table of Content:
- 1. What is Backlight Membrane Switch?
- 2. What is the light source for the Backlight Membrane Switch?
- 3. How to boost the brightness of your Backlight Membrane Switch?
- 4. How to make the light level of your Backligh Membrane Switch even.
- 5. What is the general structure of the Backlight Membrane Switch?
- 6. How to use Backlight Membrane Switch?
- 7. What are the advantages of Backlight Membrane Switch?
- 8. Circuit selection for Backlight Membrane Switch?
1. What is Backlight Membrane Switch?
Backlight Membrane Switch is a Membrane Switch that lights up the logo of the button, the simple pattern or the entire product through the light source on the line. The choice of light source is LEDs, LEDs come with light guide film, EL cold light film or Fiber optic. And the light in the lighting area needs to be uniform and the brightness is better. Backlight Membrane Switch is mainly divided into four categories: EL Membrane Switch, LEDs Membrane Switch, Light guide film Membrane Switch (LGF) or Fiber Optic Membrane Switch.
2. What is the light source for the Backlight Membrane Switch?
First, the Backlight Membrane Switch must be divided into four categories.
EL Membrane Switch: The light source is the AC high voltage through the DC-AC inverter, so that the electric field excites the fluorescent substance to emit light, thereby illuminating the area that the Membrane Switch needs to be lit. In addition, EL luminescent film is generally used as the fixed layer of the shrapnel of the Membrane Switch. Requires more power consumption.
LEDs Membrane Switch: Most of the time, the light source only uses forward LEDs to light the required pattern, but the brightness is not very uniform. It is the relatively backward Backlight Membrane Switch technology. Less energy consumption is required.
Light Guide Film Membrane Switch: An upgraded version of the Leds Membrane Switch, which illuminates the desired area through LEDs and the Light Guide Film independently developed by Niceone-Keypad, with uniform brightness and aesthetics. Light Guide Film facilitates the transmission and retention of light. Therefore, Light Guide Film Membrane Switch has always been known by customers as the best-selling product of Niceone-Keypad.
Fiber Optic Membrane Switch: The light source of Fiber Optic Membrane Switch comes from LEDs and a design that disperses the light source through Fiber Optical material. Brightness is very uniform and power consumption is low. Membrane Switch suitable for large area lighting. At the same time, Fiber Optic is generally used as a fixed layer.
| Light Source | Enhanced Light Guide Material | Energy Consumption | |
| EL Membrane Switch | EL cold light sheet | Phosphor | High |
| LEDs Membrane Switch | LEDs | No | Low |
| Light guide film Membrane Switch（LGF） | LEDs | Light Guide Film | Low |
| Fiber Optic Membrane Switch. | LEDs | Fiber Optic | Low |
3. How to boost the brightness of your Backlight Membrane Switch?
It is also necessary to separate the four categories of products.
Light Guide Film Membrane Switch:
- Use LEDs with higher MCD.
- Light Guide Film needs to be specially made by Niceone-Keypad.
- Use ink with better light transmittance.
- The combination of color printing technology and silk screen printing technology.
- Use lower resistance wiring.
- LEDs with higher MCD: This is because the higher the MCD, the higher the lumen and the stronger the light source. At the same time Niceone-Keypad can make MCD higher by customizing LEDs.
- Light Guide Film: One of the most important components in Light Guide Film Membrane Switch. At this time, whether the light source of LEDs can be evenly distributed depends on the layout design of Light Guide Film, which is also one of the most important core technologies of Niceone-Keypad. Generally divided into printing dots and dots. Dotting technology is more expensive for molds. Consult Niceone-Keypad for details.
- Ink with better light transmittance: The ink with better light transmittance is to transmit light more easily. At the same time, Niceone-Keypad recommends customers to use light color as the light guide logo or pattern, so that the light transmittance will be better.
- Combination of color printing technology and silk screen printing technology: Mainly used for Membrane Switch in dark color systems that require light-transmitting areas. At the same time, the cost is higher, and the color is not stable.
- Flex Copper Circuit and PCB circuit: The resistance of these two is lower than that of Flex Silver Membrane Switch, which is beneficial to make the light of LEDs more dazzling.
EL Membrane Switch:
- Use high brightness luminous powder.
- Use ink with better light transmittance.
- Appropriately increase the voltage and frequency
- High-brightness luminescent powder in EL: In fact, it is equivalent to MCD in LEDs. The higher the intensity of the reflective powder, the higher the brightness of the EL.
- Ink with better light transmittance: The ink with better light transmittance is to transmit light more easily. At the same time, Niceone-Keypad recommends customers to use light color as the light guide logo or pattern, so that the light transmittance will be better.
- Appropriately increase the voltage and frequency: Increasing the voltage will help to increase the brightness of the EL, but too high frequency will reduce the life of the EL Membrane Switch.
LEDs Membrane Switch:
- Use LEDs with high MCDs
- Increase material thickness to 2mm and use diffuser
- Select high transparency ink
- LEDs with higher MCD: This is because the higher the MCD, the higher the lumen and the stronger the light source. At the same time Niceone-Keypad can make MCD higher by customizing LEDs.
- Ink with better light transmittance: The ink with better light transmittance is to transmit light more easily. At the same time, Niceone-Keypad recommends customers to use light color as the light guide logo or pattern, so that the light transmittance will be better.
- Increase the thickness of the material to 2mm and use a diffuser film: At this time, it is conducive to the diffusion of the light of the positive light to achieve a soft effect. However, the thickness must be at least 2mm to achieve the diffusion effect, otherwise the light will appear light spots.
Fiber Optic Membrane Switch:
- Use the excellent Fiber Optic.
- LEDs with higher brightness.
- Excellent Fiber Optic: The Fiber Optic customized by Niceone-Keypad has excellent light guide effect. In this way, when the LEDs light is emitted, it is beneficial for the light to illuminate the whole.
- LEDs with higher MCD: This is because the higher the MCD, the higher the lumen and the stronger the light source. At the same time Niceone-Keypad can make MCD higher by customizing LEDs.
In fact, most of the time these types of Membrane Switch should be used with black adhesive tape to avoid light leakage.
4. How to make the light level of your Backligh Membrane Switch even.
This type of problem often occurs with Light Guide Film Membrane Switches and LEDs Membrane Switches.
- The light guide plate is not good enough.
- LEDs are not bright enough.
- Ink light conductivity is not enough.
- No wiring with low resistance is selected.
For details, you can refer to the Backlight Membrane Switch instruction book.
5. What is the general structure of the Backlight Membrane Switch?
There are four types of Backlight Membrane Switch designs: EL Membrane Switch, LEDs Membrane Switch, Light guide film Membrane Switch (LGF) or Fiber Optic Membrane Switch. So their structures are roughly divided into four types.
6. How to use Backlight Membrane Switch?
The Backlight Membrane Switch is generally used in a low-light environment. This is because the absence of an external light source can cause problems with operating the Membrane Switch. Industrial equipment that needs to be used for a long time in the dark or in a low-light environment. In a medical environment, if the elderly need to make an emergency call in the dark, the Backlight Membrane Switch can be used. This is because the Backlight Membrane Switch can give people a striking reminder in the dark. If it is a hunting machine in a hunting environment, then hunter players usually need to hunt in a dark environment, and the Backlight Membrane Switch helps users and players to see the switch clearly, so as to use the hunter to capture. For more design requirements, please contact Niceone-Keypad.
7. What are the advantages of Backlight Membrane Switch?
Although the cost of the Backlight Membrane Switch will increase significantly, the features of the Backlight Membrane Switch definitely bring several benefits to the product:
- When the product is used in the dark or in a place with insufficient light, the visibility and operability are effectively improved
- It has an attractive effect, which can better prompt the user to operate and attract the attention of others. Such as warning buttons or switch buttons.
- Make it easier for vulnerable groups such as amblyopia to find the product.
- A more modern design is conducive to market competition. If your product can add an extra feature that shines in the dark that your competitors can’t, then your product will invisibly outperform everyone else.
- Has the function of fast positioning, thereby improving production efficiency.
8. Circuit selection for Backlight Membrane Switch?
Backlight Membrane Switch’s LGF Backlight Membrane Switch circuit options generally have three types, Polyester circuit, Flex Copper Circuit and Printing Circuit Board. The three have their own advantages, but there are also some disadvantages. The specific choice needs to be formed after consultation between the customer and Niceone-Keypad. In order to better understand the advantages of the three, Niceone-Keypad made the following diagram for customers to understand:
| Resistor | Cost | Backlight Effect | Parts Assembly | |
| Polyester circuit(PET circuit) | Higher | Low | Normal | LEDs only |
| Flex Copper Circuit(FPC circuit) | Low | High | Good | most electronic accessories |
| Printing Circuit Board(PCB) | Low | High | Good | electronic accessories |
Since the resistance of the line will affect the brightness of the LEDs, generally users who have higher requirements for Backlight will use the Flex Copper Circuit and Printing Circuit Board. At this time, the resistance of the two is lower and the performance is more stable. However, if the user only needs to play a warning or prompt function, then the PET line is also a good choice.
EL and Optical fiber Membrane switch can choose Circuit according to user needs. The circuit’s resistance doesn’t have much effect on the lights.
