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Tutorial: Dr Pan Teaches How LCD Module Works And How To Choose Good-Quality LCD Module

Dr Pan: Welcome to DISPLAY Museum. I am Dr Pan, the curator of Museum.

Greg: Hello, Dr Pan. I am Greg. I came here to learn about LCD module.

Dr Pan: Hello, Greg. In short, it consists of LCD screen and LED backlight. The working principle of LCD module is that LED backlight module emits uniform light to the surface as the light source of LCD screen and LCD screen which works as a switch is to control the light “on/off”, resulting in the display of the image.

In order to control the display content, we have to use IC to issue the commands. According to the different locations of IC, it can be divided into COG and COB LCD module. Based on the display content, it can be divided into segment, dot matrix, graphic and character LCD module.

Normally, it is much thicker than OLED since it has a backlight as the light source. It can be very thin, but the thinner it gets the more technical problems we have to solve, the higher the price will be. The advantage of LCD module technology is that it is very mature and very stable, the unit price is significantly lower than OLED’s.

Greg: Dr Pan, how can we confirm if LCD module is good quality?

Dr Pan: That is a good question. There are several factors we need to consider.

  1. Defective pixel. The less the better. LCD screen is composed of many display points.  If there is no defective pixel, it is class AA; it is class A when there are less than 4 defective pixels and only 1 bright spot; and it is class B when there are less than 4 defective pixels and 2 bright spots.
  2. The brighter the better.
  3. Contrast rate. It means the comparison between the brightest part and the darkest part of LCD. The minimum contrast rate is 350:1, the higher the better.
  4. Response time. The faster the better. The minimum response time is 30ms, it means 33 frames per second.
  5. Color Gamut. The higher the better.
  6. Viewing angle. The wider the better. TN LCD is only 90 degree, HTN is 110 degree, STN is 210 degree to 255 degree, FSTN is the advanced version of STN with one compensation film, the view angle is better.

Greg: Thank you, Dr Pan. Now I got it.

Dr Pan: Welcome to contact us if you have any question.

Feature Products

There are more than 100 new prototypes being developed every month and only a few selected typical feature products are displayed. 

Display Type: VA / Segment

Display Size: Customized

Display Mode: Negative

Display effect: Black Background and White Letters with Blue Silk Printing

Structure: COB LCD Module with Touch Button

Application: Air Conditioner

Display Type: FSTN / Segment

Display Size: Customized

Display Mode: Positive

Display effect: Grey Background and Blue Letters

Structure: COB LCD Module

Application: Air Purifier

Display Type: FSTN / Dot-matrix

Display Size: Customized

Display Mode: Negative

Display effect: Blue Background and White Letters

Structure: COB LCD Module 

20*2 Character LCD Module

Display Type: STN / Segment

Display Size: Customized

Display Mode: Positive

Display effect: Yellow-green Background and Blue Letters

Structure: COB LCD Module

Application: Electricity Meter

Display Type: TN / Segment

Display Size: Customized

Display Mode: Positive

Display effect: Blue Background and White Letters 

Structure: COB LCD Module

Application: Massage Chair

Display Type: HTN / Segment

Display Size: Customized

Display Mode: Negative

Display effect: Blue Background and White Letters 

Structure: COB LCD Module

Application: Illumination Equipment

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Customize Your Monochrome LCD Module From a Chinese Manufacturer

DISPLAYBLY is among the top monochrome LCD module manufacturers in China. We have been supplying both small and large companies with eco-friendly and ISO-certified monochrome LCD modules in different structures, including COB structure,  COG structure, and hybrid structure, standard dot-matrix LCD modules， including graphic LCD module and character LCD module， at wholesale for 2 decades. 

COB LCD Module

One low cost, stable, usually used in LCD module with sophisticated and complex functions. Simple monochrome COB LCD module could be replaced by monochrome COG LCD module .

COG LCD Module

One low cost, steady and compact size monochrome COG LCD Module, simple structure and easy for mass production.

Quote for Custom LCD Module

Fill in the online form. We will contact you within 1 working day, please pay attention to the email with the suffix “@displaybly.com”.

Graphic LCD Module

One low cost, standard dot matrix LCD module, with no tooling fee, format of graphic resolution including 122x32, 128x64, 128x128, 144x32, 160x160, 192x64, 192x128, 240x128, 320x240 and etc

20 by 2 Character STN Positive Display Yellow Background Black Letters COB LCD Module

Character LCD Module

One low cost, standard dot matrix LCD module, with no tooling fee, available from 8x2, 12x2, 16x1, 16x2, 16x4, 20x2, 20x4, through to 40x4 formats with 5x8 dot matrix characters.

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Monochrome LCD Module Solutions For OEMs

Monochrome LCD Modules are highly popular due to their low-cost and high customization. Our experienced team can develop the right solution with an integrated assembly of different technologies to your hands.

Display Technologies

  • Display type: TN, HTN, STN, FSTN and VA
  • Transmissive, transflective and reflective polarizers
  • Positive and negative modes
  • ITO glass thickness： 0.4mm, 0.55mm, 0.7 mm and 1.1mm
  • Static driving mode and dynamic driving mode
  • Shapes: round, rectangle， octangle and through-holes
  •   View angle: 12 O’clock, 3 O’clock, 6 O’clock, 9 O’clock, and full view angle
  • background-color customization： grey, blue,  yellow-green, black  and so on

Assembly Services

  • Silkscreen: Black mask, red, green, blue, multi-color printing
  • Touch solutions: one-sided ITO film touch technology and double-sided ITO film touch technology
  • In-house backlight assembly
  • customizable PCBA with touch buttons
  • Integration with overlay resistive or capacitive touchscreen 
  • Surface treatment: strengthened glass, electrostatic prevention, polarizer with UV filter
  • Interface: I2C, SPI
  • Connection: PIN, zebra, FPC

Why Work With Us

No more endlessly wasting your valuable time on lousy design monochrome LCD modules. DISPLAYBLY’s goal is to let you sit back and relax. Our consultant will keep you informed of the production progress throughout and we take care of all the hard works, including trade stuff, clearance, and logistics, etc.

  • You don’t have to be bothered to focus on the technical details since we are the experts.
  • You don’t have to care about the time difference since we offer 24/7 service.
  • You won’t have trouble designing the products by yourself since we can make the design for you for free.
  • You don’t have to worry about the samples since we will make the prototypes for you until you are satisfied for one-time payment.
  • You don’t have to concern about the quality since we have the best quality control system.
  • You don’t have to be anxious about the lead time since we are always ready and provide the best service on time.

Experienced Team

More than 10 years experience professional engineer team.

High Capacity

More than 10 production lines and can provide 50 thousand pieces of LCD module per day.

Modern Technology

The world’s leading technology and complete sets of imported production equipments.

Strict Quality Control

Implement ISO9001 quality control system to make high-quality standard products.

A Few Steps of LCD Module Production Process

There are more than 30 steps for the production process of LCD module and here only a few typical production steps are displayed. 

ITO Glass Washing

Full Automation IC Bonding Machine

Pressing ACF

Gluing IC

Gluing IC

Soldering FPC

Hight Temperature De-bubble Machine

High Temperature De-bubble Machine

Full Automation PIN Assembly Machine

Full Automation LCD Assembly Machine

Testing LCD Module

Lean More About Us

New Custom LCD Display Design Development

01 Communication

To start, you have to elaborate on your specific demands. It is best if you can offer your drawings. From our experience, many of our customers only have a concept in their mind and they ask for a quote or samples directly. This is not how it works. Sometimes a video conference or a face-face conference is necessary before we can fully understand your requirements. It usually involves a lot of questions, such as: 1. What is the application of the products ? 2. What is the timeline you’re working from? 3. What problem do we expect us to solve for you?

02 Design

After the first step, we both have some basic understandings . We pass some projects which are not suitable for us. And we can move on the next step: design. To better service our customers and save both of us some time, we will ask you to fill in some of our online forms. Online form custom LCD module. This is the basic information we have to acquire. If you are not certain about some parameters of custom LCD module, we will make the most reasonable design for you from engineering prospect.

03 Quote

Once the preliminary drawings are approved, we offer an official quotation which includes the unit prices, the tooling fees and the other details. Submit the payment if you are happy with the prices. If you can’t accept the prices, we can go back to step two. we can make it cheaper by simplifying the design. After we receive the payment, we will start to make the official drawings. It usually takes 1 to 3 days.

04 Prototypes

At this stage, we build samples based on tooling orders to justify proof of the concept. We can’t start the prototype process unless you sign on the official drawings. It usually takes 7 to 25 days to finish the samples base on the difficulties.

05 Validation

You as the customer validate the efficacy of the custom design before we agree to move into the larger production. It is normal to make several times of prototypes. One time tooling fee and no extra cost until you are satisfied.

Ask For A Quick Quote

We will contact you within 1 working day, please pay attention to the email with the suffix “@displaybly.com”. 

Production Videos

Are you still wondering how we produce  COG LCD module, COB LCD module, LCD module hybrid structure, LED backlight module, etc? Check the assembly process videos below and you will find your answers. 

A Review of Assembly Process of LCD Module Hybrid Structure with Membrane Switch Button
A Review of Assembly Process of LCD Module Hybrid Structure with LEDs on the PCB
A Review of Assembly Process of COB LCD Module for Fueling Equipment
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We will contact you within 1 working day, please pay attention to the email with the suffix “@displayman.com”.