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High temperature TFT panels

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EPSON, represented by TE Australia , has developed high temperature polysilicon (HTPS) thin-film transistor liquid-crystal panels that raise the performance bar for liquid-crystal (LC) projectors.

The new HTPS panels, known by their development code name as the D IV series, further improve on the performance of last year's D III series.

The D IV series panels incorporate leading-edge technology for achieving higher aperture ratios and higher image quality. Designed particularly for consumer projectors, the new panels offer outstanding brightness, image quality and cost performance.

Features include:

1. High aperture ratio. High pixel density fabrication technology enables a pixel pitch of 12μm.

* Higher aperture ratio on same-size LC panels. (For example, the aperture ratio on a 0.7-inch XGA panel was increased 13%, from 53% to 60%.)

* Even with a 12μm pixel pitch, aperture ratios remain essentially the same, enabling the size of panels to be scaled down.

(For example, whereas a conventional 0.9-inch, wide-format, 1284 x 724 720P panel has an aperture ratio of 52%, a new 0.7-inch, wide-format panel with the same resolution has an aperture ratio of 50%.)

2. High image quality. New planarisation technology and a smaller (2.5μ) cell-gap design is used.

* Panel planarisation produces an even smoother picture.

* The reduced cell-gap boosts response speed by 25%.

* Even with a high pixel density (a 12μm pixel pitch), a contrast of 500 is achieved without sacrificing transmittance. (The result is improved quality of moving images.)

3. These panels offer the following benefits in a projector:

* A high aperture ratio for increased brightness, without changing the lamp specifications.

* A smaller panel size, yet the same resolution, nearly the same aperture ratio, and higher cost performance.

* Enhanced quality of moving images.

The new panels will be available in sample quantities from June 2003 and in production quantities from September 2003.

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