HDMI 1.4 Standard Highest support resolution problem

Problem phenomenon:

Using an HDMI interface with an external 2560*1440 resolution display, using HDMI single screen output maximum resolution can only reach 1920*1080, this model with HDMI 1.4, why not support 2560*1440 resolution monitor?

Solution:

After testing, the specific situation is as follows:

1. The equipment uses the HDMI to be 1.4 standard.

2. The latest specification allows HDMI devices to support HD resolution of four times times the 1080p resolution. The new specification supports 4K*2K resolution, allowing the HDMI interface to be transmitted using the same standard resolution content used by many digital theaters. Supported display modes include: 3840*2160@24hz/25hz/30hz and 4096*2160@24hz.

3. Note that the second article: 1.4 Standard is higher than 1920*1080 resolution, only two resolution 3840*2160 and 4096*2160 2560*1440 resolution not used, And the realization of these two resolutions also needs to meet the requirements of the refresh rate. The normal LCD refresh rate is fixed to 60HZ, so the output of these two resolutions cannot be reached.

4. In addition to meeting the above conditions, in addition to achieve a higher resolution requires high-speed HDMI cable connection, as well as the hdmi-in input to support the HDMI 1.4 standard.