Acer HS244HQ, Lifecycle Extension Manual

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ACER S190HQL 7
1.3.4 Monitor Modes and Timing Capability:
1.3.4.1 Format and Timing:
The monitor shall synchronize with any vertical frequency from 48 Hz to 75Hz, and with any horizontal
frequency from 31 to 84 KHz for analog input (56 to 75 Hz, 31 to 84 KHz) and HDMI (48 to 75 Hz, 31 to
84 KHz). If the input frequency is beyond the specified range, the monitor shall display a warning screen
indicating that the input frequency is out of range. Under no circumstances shall any combination of input
signals cause any damage to the monitor.
1.3.4.2 Factory Assigned Display Modes:
There are 15 factory pre-set video modes. Pre-defined mode parameters will be recalled if the operating
mode is one of those pre-set modes . If the operating mode is not one of those stored in memory, the
monitor CPU will select the PRESET timing for a mode that is the next lowest in horizontal scanning
frequency The screen parameters can be adjusted by the front bezel control buttons and then saved as a
user defined mode. The monitor shall include all the preset video timings shown in the following table.
1.3.5 Controller Requirements:
1.3.5.1 General Requirements:
The monitor shall include a controller which is capable of converting the analog RGB signal o r HDMI
digital signal to the panel. The controller will include a PLL, A/D converters, TMDS receiver and other
circuitry necessary to perform its function. The PLL shall be stable enough to ensure a stable image.
1.3.5.2 Video Stretching:
The monitor shall have the function to “stretch” the video signal, so that an input signal from the
computer in any resolution smaller than 1920x1080 is automatically expanded to fill the entire
screen.
1.3.5.3 Panel Timing and Interface:
The controller supplied with the monitor shall control all panel timing. This controller shall adequately
insulate the monitor from the computer, so that no possible combination of input signals from the
computer shall cause damage to the flat panel or any other component of the monitor