When considering a display module for your project, sooner or later you’ll have to answer the question: “Should I design around a standard module or have one customized for my application?” The question is straightforward enough, but considerations that weigh into the answer can be as varied as the LCD module applications themselves. Here are some tips, common misconceptions and answers to common questions that will help you with your decision.
One common misconception is that custom display modules cost more than standard “off-the-shelf” modules. While the above holds true for NRE cost, module unit pricing is often equivalent or lower for custom LCD modules than for similar off-the-shelf product. Here’s why:
Standard display modules are often designed to maximize their implementation potential. This can lead to high pin counts that allow for variable interface protocols, high output back lighting to maximize application potential and generally conservative mechanical design practices (patented components, robust EMI solutions, metal bracketing, incorporated drive circuitry, etc). For many applications, design-specific changes can reduce unit production cost through application-specific simplification, sometimes significantly so.
What about the additional NRE cost to customize?
For most Passive Matrix LCD modules, Nex Vision Display can deliver a custom LCD (active area size and resolution), with custom back light, mechanical housing and electrical interface for reasonable NRE cost. Likewise, we can customize the back light, housing and mechanical interface of an Active Matrix LCD module for NRE lower than $5k USD. In these cases, the design flexibility that customization allows for often justifies the modest NRE required.
Customizing the Active Matrix LCD itself (size/resolution), however, can be cost restrictive for most applications since the minimum NRE required for panel mask sets is around $100k USD. Unless project volumes are over 500k pieces per year (depending on size) or the scope of the business otherwise dictates a customer-owned TFT panel (e.g. guaranteed long-term panel availability), most designers find they are better off customizing around readily available TFT standards. In many applications the combination of a standard AM TFT cell with a custom designed module and electrical interface offers the most favorable overall cost solution.
Does my project schedule allow for the additional time required to customize?
Short lead time is another consideration that often makes off-the-shelf LCD modules attractive for designers. But, the lead time for a custom design can be shorter than you’d think. We typically design custom housing for passive or active matrix LCDs – with integrated capacitive touch sensor and interface – We also offers customers the option to use off-the -shelf modules as prototypes within their design, before the custom display is ready, so they can evaluate other design aspects and perform qualification work (e.g. testing software). For many implementers, the design freedom and iterative optimization that customization offers is well worth the additional time required to sample custom LCD modules.
NextVision Display provides standard and custom LCD modules with and without integrated capacitive touch panels and front cover lenses. Our integrated display modules are available as off-the-shelf products, as semi-custom display modules modified for specific applications, and as fully custom display modules designed from the ground up based on a unique set of customer requirements. No matter the size and scope of your display application, We are ready to provide a solution with just the right amount of customization to meet your needs.