Abstract:
Embodiments of the present invention generally relate to an optical valve that modifies a laser beam to allow more energy to be irradiated onto less absorbing areas on a substrate and less energy to be irradiated onto more absorbing areas on the substrate, thus creating a more uniform heating field. The optical valve is a layered structure comprising a reflective switch layer, an absorbing layer, a thermal resistor and a thermal bath.
Abstract:
A transflective display includes a substrate, a partially absorbing layer arranged on the substrate, a reflection layer arranged on the partially absorbing layer opposite to the substrate, and an emissive layer arranged on the reflection layer opposite to the partially absorbing layer. The emissive layer includes a plurality of light-emitting elements that emit light of at least one color and a dye of a color other than the at least one color of the plurality of light-emitting elements. The reflection layer is arranged to reflect some light from the emissive layer back into the emissive layer.
Abstract:
A method of writing an image on a liquid crystal display (10) of the type having a layer of cholesteric liquid crystal (30) material disposed between a pair of unpatterned conductors (20,40) and a light absorbing layer (35) for forming an imagewise thermal pattern in response to an imagewise pattern of light, including applying a first voltage (110) to the conductors; applying a second voltage different from the first voltage to the conductors after applying the first voltage, wherein the first and second voltages are non-zero and are generated by means of bipolar waveform generators (93); and exposing the liquid crystal display to the imagewise pattern of light generated by means of a flash lamp (52) and a mask (94).
Abstract:
Rewritable signs (100, 1300) that include bistable cholesteric liquid crystal layers (102, 1402, 1404, 1406) are provided. According to one embodiment a rewritable sign (100) is devoid of circuitry for establishing electric fields in localize regions for writing information to the rewritable sign (100), and is consequently inexpensive. In the latter embodiment, a separate information writer (400) that includes an array of pixel electrodes (404) that is driven by an active matrix (602) is used to write information on the rewritable sign. According to another embodiment a rewritable sign (1300) includes three cholesteric liquid layers (1402, 1404, 1406) each of which reflects a different primary color. The three cholesteric liquid crystal layers (1402, 1404, 1406) are interleaved with sets of conductive lines (1316, 1320, 1322, 1324) that are used to apply signals to the cholesteric liquid crystal layers (1402, 1404, 1406) for the purpose of writing information.
Abstract:
A reflective liquid crystal display (LCD) including a cholesteric liquid crystal polyrizing device and a liquid crystal cell superimposed with one another. In various embodiments, the reflective LCD may be a normally white mode or normally black mode device. In another variation, the liquid crystal cell may include a 90 DEG twisted nematic liquid crystal.
Abstract:
A monotone liquid crystal display capable of achieving colorful metallic display, comprising a TN liquid crystal device having a pair of transparent substrates (1, 2) provided with respective transparent electrodes (3, 4) and a nematic liquid crystal (6) about 90 DEG twist-aligned and sealed in the space between the substrates (1, 2), a first polarizing plate (17) disposed on the viewed side of the TN liquid crystal device (7), a second polarizing plate (18), a circular polarization phase plate (6), a cholestric liquid crystal polymer sheet (10), a semitransparent light absorbing member (15), and a backlight (16), the second polarizing plate (18), the circular polarization phase plate (6), the cholestric liquid crystal polymer sheet (10), the semitransparent light absorbing member (15), and the backlight (16) being arranged on the opposite side to the viewed side in order of mention, whereby the display can be recognized even at night when the backlight (16) is operated.