How to choose LCD
2015/10/26 view:
1, LCD screen, resolution: point, duty; positive display, negative display; color; STN, FSTN.
2, drive mode: drive IC, there is no control IC.
3, driving voltage: built-in, external, positive, negative, voltage value.
4 forms: CCFL, LED, backlight, EL, back side.
5, module structure: TAB, COG, COB; installation structure.
6, 80: parallel interface mode, parallel port, serial port, serial port 232 I2C 68.
7, select the LCD module, the first consideration is the display content, according to the display content determine the lattice; second according to the structure to determine the liquid crystal size (including shape and effective display area); and then use the environment: temperature, light, humidity, mechanical strength, etc. (temperature type: 0 - -20, wide temperature type +70 - +50); the use of the environment light a), reflective type (no backlight, lighting or day use), suitable for light. B) through the reflective type (with backlight, light or dark), it can be light to open and close the backlight, suitable for outdoor. C), a transmission type (having a backlight, light or dark), the backlight must be open, not suitable for outdoor.
8, for humidity, mechanical shock strength: the proposed use of TAB or COG products, the connection is reliable, not easy to occur micro erosion (COB due to the conductive adhesive strip, the seismic capacity is weak, the other PCB gold finger part is easy to occur micro erosion).
Second according to CPU resources, select the interface mode, the LCD module built-in controller: now many ARM chip internal LCD controller, can be integrated into the cost, choose the appropriate LCD module, the LCD module is usually 128 lines, which do not need a dedicated LCD controller, which will drive and control integrated S6B0108, SED1520, S6B1713, S6B0741, SED1565, 128 lines are usually used to drive IC S6B0086, IC, NT7701, T6A39, T6963, IC, SED1335, RA8802.
9, STN and FSTN: FSTN speed faster, contrast and viewing angle is better suited to high number of rows, cost than STN high 10-20% color and background color of the slightly different; tab and cob, tab reliable connection and ultra-thin structure and the power consumption is low, the structure strength is low, anti weak shock; cob structure high strength, heavy structure, poor connection, power consumption for desktops.
10, several backlight comparison:
CCFL: it is suitable for large and medium-sized liquid crystal, to the light guide plate, high brightness, long service life, need inverter.
LED: suitable for small and medium sized LCD, need light guide, high brightness, life can reach 50000 H, usually do not need special power supply.
EL: suitable for small and medium sized LCD, ultra thin (less than 0.4mm), low brightness, low power consumption, short life (2000H)
2, drive mode: drive IC, there is no control IC.
3, driving voltage: built-in, external, positive, negative, voltage value.
4 forms: CCFL, LED, backlight, EL, back side.
5, module structure: TAB, COG, COB; installation structure.
6, 80: parallel interface mode, parallel port, serial port, serial port 232 I2C 68.
7, select the LCD module, the first consideration is the display content, according to the display content determine the lattice; second according to the structure to determine the liquid crystal size (including shape and effective display area); and then use the environment: temperature, light, humidity, mechanical strength, etc. (temperature type: 0 - -20, wide temperature type +70 - +50); the use of the environment light a), reflective type (no backlight, lighting or day use), suitable for light. B) through the reflective type (with backlight, light or dark), it can be light to open and close the backlight, suitable for outdoor. C), a transmission type (having a backlight, light or dark), the backlight must be open, not suitable for outdoor.
8, for humidity, mechanical shock strength: the proposed use of TAB or COG products, the connection is reliable, not easy to occur micro erosion (COB due to the conductive adhesive strip, the seismic capacity is weak, the other PCB gold finger part is easy to occur micro erosion).
Second according to CPU resources, select the interface mode, the LCD module built-in controller: now many ARM chip internal LCD controller, can be integrated into the cost, choose the appropriate LCD module, the LCD module is usually 128 lines, which do not need a dedicated LCD controller, which will drive and control integrated S6B0108, SED1520, S6B1713, S6B0741, SED1565, 128 lines are usually used to drive IC S6B0086, IC, NT7701, T6A39, T6963, IC, SED1335, RA8802.
9, STN and FSTN: FSTN speed faster, contrast and viewing angle is better suited to high number of rows, cost than STN high 10-20% color and background color of the slightly different; tab and cob, tab reliable connection and ultra-thin structure and the power consumption is low, the structure strength is low, anti weak shock; cob structure high strength, heavy structure, poor connection, power consumption for desktops.
10, several backlight comparison:
CCFL: it is suitable for large and medium-sized liquid crystal, to the light guide plate, high brightness, long service life, need inverter.
LED: suitable for small and medium sized LCD, need light guide, high brightness, life can reach 50000 H, usually do not need special power supply.
EL: suitable for small and medium sized LCD, ultra thin (less than 0.4mm), low brightness, low power consumption, short life (2000H)
- Pre：Touch screen type and working 2015/10/26
- Next：The difference between digital 2015/10/26
