Definition Of Single 8 And Double 8 On LCD LVDS Screen Line

The definition of "single 8" and "double 8" on LCD LVDS screen line! Screen line, wire harness, connection line, vbyone screen line, LVDS screen line, EDP screen line, LCD screen line, RF radio frequency line, LCD screen line, ultra-fine coaxial line, wiring harness processing

In order to answer this question, we must first talk about the composition characteristics of the LVDS signal. Like TTL signals, LVDS signals include data signals, clock signals, and control signals. In the actual LVDS screen line, in addition to the above-mentioned signal lines, there are also power supply lines (providing working voltage for the logic board) and ground lines. Usually the data line and the clock line are twisted pair (that is, two wires are twisted and twisted together), and the power supply wire, ground wire and control wire are mostly single-wire designs. LVDS signals are transmitted serially. Unlike TTL signals, the three data signals of R, G, and B are transmitted separately. Instead, the three primary color data signals of RGB are mixed and transmitted together in a certain way. These signals are often collectively referred to as data. signal. LVDS data signals are divided into single and dual transmissions, and each channel can be divided into multiple groups. Each group is composed of positive and negative signals (ie differential signals). The composition relationship is shown in the figure below. According to the number of channels and groups, there are often "single 6", "single 8", "single 10", "double 6", "double 8" and "double 10".

The "single" mentioned here means that the data signal is transmitted in a single way, and "dual" means that the data is transmitted in a dual way of odd and even pixels. Since the clock signal is the basis for transmitting and reading data signals, one set of clock signals is required to transmit data in a "single" mode; two sets of odd and even clock signals are required to transmit data in a "double" mode.

Refer to the figure above, if single-channel transmission is used and there are only 3 groups of data lines from A to C, this type of upper screen line is a "single 6" line, plus a set of clock lines, the twisted pair is 4 groups.

In the same way, if single-channel transmission is used and there are only 4 groups of A-D, the upper screen line of this type is a "single 8" line, plus a set of clock lines, the twisted pair is 5 groups. If dual-channel transmission is used, and each channel has only three data lines A-C, the upper screen line of this type is "double 6" line, plus two sets of clock lines, there are 8 twisted-pair lines. If dual-channel transmission is used, and each channel has only 4 sets of data lines from A to D, this type of upper screen line is a "double 8" line, plus two sets of clock lines, for a total of 10 sets. If dual-channel transmission is used, and each channel has 5 data lines from A to E, this type of upper screen line is called "double 10" line, plus two sets of clock lines, a total of 12 groups.

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1. In the LVDS upper screen wire, the two wires twisted together are the same group of data wires or clock wires.

2. "Double 8" and "Double 10" screen lines are mostly used on high-definition (1920×1080) LCD screens.

3. The sequence and positive and negative of the signal line or the clock line must be correct, otherwise the image is abnormal and the image cannot even be displayed.

4. The existing partial full HD LCD screens (FHD, resolution 1920x1080) have two LVDS upper screen lines: some full HD 120Hz LCD screens (FHC-120Hz) have four LVDS upper screen lines.