PDF datasheet for the PG128128LRU-ATA-B graphic LCD module, marked OK in the name, which suggests a checked copy. The PG prefix is used by Powertip for its graphic displays, and 128128 points to a 128 x 128 dot matrix. Such a sheet normally covers dimensions, pinout, supply voltages, backlight ratings, controller interface and timing diagrams. Use it when wiring, replacing or troubleshooting the module in industrial or instrument equipment, and compare the suffix letters on the part label, since they mark display and backlight variants.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @acodis_lcd_datasheets_EDID. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.