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12-21

2023

Common external interface types

Parallel interface Data is transferred in parallel; The commonly used parallel ports are: 8080 timing (/RD /WR /CS RS DATA BUS), 800 timing (E R/W /CS RS DATA BUS), data bits: 4 BIT, 8 BIT, 16 BIT, 8 BIT, 24 BIT, the main characteristics: the speed of data transmission is fast; Transmission mode: point-to-point; The display data in the IC can be read out. SPI interface Data is transmitted in a certain sequence, bit by bit; Commonly used SPI interface: 3-SPI (/CS SCL SI), 4-SPI (/CS RS SCL SI) transmission speed is relatively slow; Transmission mode: point-to-point; Data in IC should not be read in general: IIC interface Data is transmitted in a certain sequence, bit by bit; Interface definition: SCL, SDI, SDO interface need pull-up resistors; The transmission speed is slow; Transmission mode: point opposite; Address lines are needed to distinguish individual IIC devices; Generally can not read the data in the IC;

12-21

2023

Photoelectric parameters of BL

The brightness of the BL is expressed in CD/CM2 BL brightness consistency: *% The driving voltage of BL: VF The driving current of the BL: IF BL life: is the LED lamp attenuation to 50% brightness life, generally 5-10 years Types of BL: LED, EL, CCFL

12-21

2023

Photoelectric parameters of LCD

The types of LCD: TN(HTN, VA, ETN), STN(FSNT), CSTN, TFT; Type can be seen visually difference, function is different Various types of optical modes: reflection, semi-reflection, high reflection and high transparency, transmission Transmittance: The proportion of light passing through LCD driving conditions: working voltage VOP, DUTY cycle, BIAS ratio bias LCD working environment: temperature, humidity, UV, anti-glare LCD resolution: segment, character dot matrix, graphic dot matrix LCD display quality: contrast, response speed (normal temperature, low temperature, high temperature) The connection mode of LCD: zebra paper, zebra strip, metal pin, TAB, COG, COF LCD service life: generally 5 years, the preferred material can be up to 10 years

12-21

2023

The concept of photoelectric parameters

LCM photoelectric devices include LCD PANEL (LCD PANEL, LCD screen, LCD glass, integrated LCD) and backlight. LCD is a kind of optical switch, which can control the performance of light through, partially through, and not through when it is powered on. In essence, it is a device that modulates light flux under the action of electricity. BL is a light emitting device that turns the light emitting diode into a surface light source, which is the main light source of LCM.

12-21

2023

Basic structural parameters of LCM

AA area: effective display area VA area: Effective visual area, VA and AA area together determine whether the product can be matched to the customer panel window. Positioning hole distance: it is related to whether the product can be assembled with the positioning hole on the motherboard. Positioning hole size: it is related to whether the positioning hole diameter of the product can use the customer's screw. Position of VIEWable AREA: THE position of VIEWable AREA in XY direction is related to whether the product can be installed in the same position as the customer panel window. Interface size: It is related to whether it matches the connection method of the customer. Interface location: It is related to whether the customer can be used when the connection mode is hardwired. Dimensions above the PCB board: whether the product in the Z direction affects the installation. Iron shell shape. Product shape.

12-21

2023

Characteristics of LCM

Flat panel display, small size, light weight. The working voltage is low and the power consumption is small. The working voltage of the simple broken code LCD is 2-5V, unit surface The power consumption of the product is about 0.01uA/mm², and a button battery can be used for two or three years. The life is relatively long, generally can reach more than 50,000 hours. Electromagnetic radiation is low, harmless to human body, not easy to cause eye fatigue. It is passive luminescence, not easy to be washed by strong light, the stronger the external light, the clearer the display. Easy to drive, using a simple single chip microcomputer can be driven, simple and convenient. Simple structure Single, no complex mechanical structure.

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Tianjin Right Display Co., Ltd.

  • ADD:D2 Factory Building, No.7, East of Guwang Road, Jingbin Industrial Park, wuqing district, Tianjin

    FAX: 301712

    TEL : 022-25255909  / 18133876017

    E-mail : sales@trdisplay.com

    WeChat: 18133876017

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