We are pleased to share with you the development case of a 15.6-inch lcd display. This display is a commercial weighing scale display developed for our client Eurobil, which is divided into a touch-enabled operator monitor and a non-touchable customer monitor. It is mainly used in weighing and cash register systems. The following picture shows the final product at the client's end.

    Link of the scale: https://eurobil.it/en/product/linea/ 

    Link of HL 15.6” monitor: https://www.hello-lighting.com/Custom/58.html 

Development Process of 15.6 Touch LCD Display

     1. Development of 15.6 Touch LCD display + Aluminum frame

       The initial inquiry is a 15.6” FHD TFT LCD display with CTP for 50pcs and 500pcs. We advised customer the NV156FHM-N4X with optical bonding Capacitive Touch Display

Then customer send us the some pictures to further require a 15.6” Touch Panel with aluminum alloy frame, see below picture/video. We shared our currently design of the aluminum enclosure. Then first samples of 15.6” touch LCD display with Aluminum frame goes for customer’s evaluation. 

    2.Customer Evaluation of Touch LCD Panel + Frame Sample

      During the customer evaluation phase of the framed touch LCD panel samples, we focus on the overall component bonding accuracy, structural stability, and touch response consistency. Customers not only verify the proper functioning of the LCD display and touch functionality but also assess the assembly tolerances, sealing, and resistance to mechanical stress between the frame and the panel. Furthermore, the sample's heat dissipation performance, anti-interference capabilities, and long-term reliability are also key evaluation factors. Through this phase, customers can comprehensively determine whether the component meets the overall requirements of the end product for display, touch interaction, and structural strength.

   3.Discussion on PCB, Speaker, Cables, and Rear Cover

     In this discussion, we conducted a detailed evaluation and technical exchange focusing on four core components: the PCB (Printed Circuit Board), the speaker, the cables, and the rear cover. For the PCB, we focused on confirming its layout and signal interface compatibility with the touch display module. For the speaker, we addressed the acoustic cavity sealing method and its impact on the overall thickness. Regarding the cables, we clarified the routing paths and fixing methods to avoid electromagnetic interference and ensure ease of assembly. For the rear cover, we mainly discussed its interlocking structure with the front frame and the selection of materials. By synthesizing feedback from all parties, we finalized the compatibility between the components and finalized the overall design scheme, providing a clear basis for the next stage of sample production.

   4.Final Design Confirmed

 For customer monitor:

- Customer finally chose HDMI board instead of Android board as the mother board of the customer monitor

 It has 30pin eDP connector, HDMI port, USB power port, speaker port and so on.. 

- HL studied the height and power consumption of the speaker and decided the final model.

- Rare cover design and Electroplate treatment of the Aluminum parts instead of painting.

- Silk printing logo 

-HDMI power cable

 Operator board:

- Anti-Finger treatment on the surface of the cover lens.

- The touch needs to be workable with wet-finger and latex glove, the IC and firmware should support such function.

- Rare cover design and electroplated surface treatment needed for all aluminum parts

- 90 degree USB cable.

- eDP cable with Molex connector 503948052, which to connect with customer’s main board.

-  Box for both monitors. 

     During the development, we did a lot of work on details which is fully showed HL’s professional tech knowledge , these points include surface treatment of the cover lens and aluminum enclosure, color of electroplating, sourcing of Molex connector 503948052 and the eDP cable’s production, diameter of the crews and sink screw hole, and so on. 

We believe a good product lie in the details and a good design needs experience and professional tech knowledge. HL can make your idea comes true !