LM057QB1T073 is a classic 5.7-inch negative blue monochrome FSTN graphic LCD module from Sharp, widely applied to old miniature industrial control devices, portable measuring instruments, inverters, textile equipment and auxiliary operation panels of small injection molding machines.
Different from traditional yellow-green positive STN screens, negative FSTN achieves higher visual contrast, with clear white characters and curves displayed on a dark blue background, delivering better readability under indoor factory lighting. It adopts universal 4-bit parallel MCU bus, compatible with both 8080 and 6800 timing signals, which can be directly matched with traditional single-chip industrial control mainboards without additional signal conversion boards.
| Item | Parameter |
|---|
| Model No. | LM057QB1T073 |
| Manufacturer | Sharp Corporation |
| Diagonal Size | 5.7" |
| Native Resolution | 320 × 240 QVGA, 4:3 |
| LCD Type | Negative Transmissive FSTN, Monochrome |
| Display Effect | White text/graphics on deep blue background |
| Interface | 4-bit Parallel MCU, 12Pin FPC, 5V logic |
| Backlight | Side WLED, On-board LED driver IC |
| Backlight Lifetime | 25,000 hours |
| Typical Brightness | 140 cd/m² |
| Contrast Ratio | 7:1 |
| Viewing Angle (L/R/U/D, CR≥2) | 40°/40°/25°/40°, 6 o'clock preferred |
| Total Response Time | 360ms |
| Refresh Rate | 70Hz |
| Pixel Pitch | 0.348 × 0.348 mm |
| Active Area (AA) | 111.36(W) × 83.52(H) mm |
| Overall Dimension | 165.0(W) × 108.0(H) × 7.2(D) mm |
| Net Weight | 155g |
| Surface | Standard matte polarizer, no hard coating |
| Operating Temp | 0 ℃ ~ +45 ℃ |
| Storage Temp | -20 ℃ ~ +60 ℃ |
| Touch Screen | Not equipped |
| Compliance | RoHS Lead-Free |
| Product Status | Discontinued legacy STN module, only spot stock for equipment repair |
Application Fields
Auxiliary parameter display panels for mini injection molding, textile and packaging machinery
Portable industrial test, measurement and analytical instruments
Small display screens inside frequency converter and elevator control cabinets
Vintage miniature PLC terminals for static text, bar charts and curve display
Local temperature & humidity display for environmental monitoring equipment
Replacement spare screen for all Sharp LM057QB1T07 series 5.7" monochrome FSTN modules
FAQ:
Q1: Do I need an external LED driver for backlight?
A1: No, the rear PCB integrates dedicated WLED drive circuit. Stable 5V DC input is sufficient to light the backlight normally.
Q2: What is negative FSTN, and its advantages over positive yellow-green STN?
A2: Negative FSTN shows white content on dark blue background with higher contrast; conventional positive STN displays black text on pale yellow-green background. Negative blue has less light reflection interference and clearer reading effect in bright workshops.
Q3: Can LM057QB1T073 replace LM057QB1T07 directly?
A3: Yes. The outline size, mounting holes, 12Pin FPC pinout and WLED backlight circuit are fully consistent, supporting plug-and-play without hardware modification.
Q4: What temperature range can this STN module work within?
A4: Operating temperature is limited to 0~45℃. It cannot work stably in unheated cold workshops or high-temperature mechanical cabinets exceeding this range, not wide-temperature industrial grade.
Q5: What are the limitations of monochrome STN compared with color TFT LCD?
A5: Only single-color display, slow response speed, narrow vertical viewing angle. It cannot display fast dynamic images or multi-color HMI interfaces, only suitable for static parameters, text and simple curve display scenarios.
