What should I do if I can't find an LCD screen of the right size?

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What should I do if I can't find an LCD screen of the right size? [Copy link]

This content is originally created by EEWORLD forum user Rohm LCD Technology Station . If you want to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source

Generally speaking, if we want to design a product with an LCD screen, we should first look for a suitable LCD screen according to the predetermined size, and then design the panel, structure, and so on.
However, since many friends have not used LCD screens before, they often make the structure first when designing products, and then look for LCD screens. In this case, it is actually very difficult to find an LCD screen with just the right size. At this time, everyone tends to be very entangled.
In fact, there is no need to worry too much. We can first understand the pros and cons of custom LCDs before deciding. Is it really a waste of money to customize LCD screens?
First of all, if you need a segment code screen, it is actually necessary to open a mold, and the mold opening fee for ordinary segment code screens is also very low, 500-2000 can basically get it done, and relatively speaking, the structure of the segment code screen is also very easy to make. Instead of wasting a lot of energy to find a needle in a haystack, it is better to save time and quickly make the product and bring it to market.
Of course, the main problem is the dot matrix screen. If you need a dot matrix screen but can't find the right size, and the mold opening fee for the dot matrix screen is usually high, at the beginning of the project, you must think that it is a waste of money to open a mold for the dot matrix screen. At this time, we can change our thinking. The most common method is:
1. Don't consider opening a mold, but you can choose an LCD screen as suitable as possible, and then make a fuss on the protective cover or sticker on the surface of the equipment to cover the area where the LCD screen exceeds or is not covered. This is the most economical way to sacrifice a little display space in exchange for a perfect structure.
2. Adjusting the structure is also a way, but most people are reluctant to do so, because some structures have high mold opening fees, and adjusting the structure involves multiple departments, and the process will be very long, so the early structure can be considered to be simply proofed by 3D printing, and then the structure can be molded after all the components are confirmed.
Back to the LCD screen mold, in fact, most people hear about mold opening, and the first thing they consider must be the mold opening fee. However, for products with expected volume or replacement, mold opening is actually the best choice, because although there is a mold opening fee, the price is lower than that of conventional products. As long as there is volume, it is actually very easy to recover the cost. Therefore, for products with expectations, you can consider mold opening customization. The unit price is reduced, and the designed products are not so easy to imitate by others, so why not do it.
In addition, there is actually another way to reduce costs here. You can find a professional LCD screen and LCD module factory. They often help customers integrate the circuit originally made on the control board into the LCD module (many customers' LCD control boards and LCD screens are separate). The biggest advantage of this is that the cost is reduced, because the LCD-related circuits can be handed over to the factory, and you can save time on circuit boards, production, debugging, and inspection. It can be said that first of all, the labor cost is reduced, and the integration does not need to consider the problem of line transmission, which is more stable.