I dont know for sure whether Sony uses 2 display manufacturers but there is some steps to check whether your Sony Xperia X has different display manufacturers or not. So, first of all you will need to root your Xperia Z smartphone and then install a terminal from the Google Play market and type the below in the terminal:
- su
- dmesg|grep -i panel
After that you need to check for "Found panel: mipi_video_********_Full_HD_******"
Incase you are not able to get proper result then try to simply restart your smartphone and it will help you out. Right now you will get the below 2 reports of the display, which is altogether different:
Sharp panel: 1
- Found panel: mipi_video_sharp_Full_HD_ls050t3sx01_id_dlogo
JDC panel: 2
- Found panel: mipi_video_jdc_Full_HD_mdy70
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