In one embodiment, a receiver for an accelerated channel change is provided. Therefore, excessive etching of the stepped portion may be prevented, so that a short-circuit defect between a metallic pattern and a pixel electrode may be prevented. Further, the adjacent pairs of semiconductor chips may be attached to opposite sides of a heat conducting plate which serves to dissipate heat generated by the chips. The license verification module may further query a third party database for updated license information upon validation failure.