All requirements pertain to the THX picture mode the manufacturer may choose different settings in other picture modes. The test sample provided by the manufacturer must meet or exceed all THX requirements, as listed in the THX specification, when measured in our San Rafael facility. The items below are a snapshot of some of requirements to achieve THX Display Certification.
THX provided the following italicized section:
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7) Assures the signal processing within the display provides full resolution without adding undesirable artifacts. 6) Confirms display of 100% of the image, assuring no aliasing artifacts with 1080i/1080p content. 5) Tests for residual images (called image retention) on a plasma display.
4) Off axis color accuracy assures minimal color shift as one moves up to 45º off center, another common issue with many LCD panels. Please note no anti reflective filter is 100% effective. 3) Uniformity assures no dark or light areas on the panel, a problem that plagues many LCD (and LED-LCD) panels. These tolerances are quite tight.ġ) Primary and secondary color points must be within a☐.005 variation. 2) Low panel reflectance allows viewing in an environment with lamps. Here is a link to a never before released list of THX tests.īelow, the techies among our readers can see the seven of the dozens of specifications a display must meet for THX Certification. They perform additional testing of display properties that are generally too time consuming or require special test equipment the HD Guru and our fellow reviewers don’t possess. THX tests signal processing, deinterlacing, color points, black levels and white levels among others criteria. In addition to the legacy test signals we and other reviewers use to evaluate HDTVs, THX created some of their own patterns (see photos). Inside THX’s test lab, we observed their array of test signals and procedures. We jumped on the chance to pierce the armor of secrecy surrounding THX’s video standards. Our host provided a complete copy of its requirements and specifications for certification with the understanding (for competitive and business reasons) we would only publish the list of test categories with a limited number of the exact specifications. (Disclosure: THX paid expenses to visit its San Rafael headquarters) THX chose the HD Guru as the first journalist to reveal details about its display testing program. To receive THX certification a display must pass a battery of tests incorporating over 400 data points. More recently, THX introduced new standards for home HDTV certification (for more on THX history click this link). Later, THX began an audio certification program for home theater.
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(May 4, 2010) Director George Lucus created the THX Certification program in 1983 to institute audio and film reproduction standards for movie theaters.
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