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01-08

2024

What is the difference between a Digital TFT and a Analog TFT?

The difference is the interface signal. The digital TFT is designed to accept digital interface signals TTL / LVDS. The analog TFT is designed to accept analog RGB / NTSC / PAL interface signals.

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.

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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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