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Transmissive LCDs

In this section a prototype transmissive LCD will be discussed to demonstrate the effectiveness of photoalignment as a multidomain method in combination with a retardation foil. Prototyping of new LCD designs is an elaborate process and therefore it is often preceded by computer simulation to find the optimum configuration. For this purpose the optical properties of various combinations of multidomain LC layers and retardation foils were simulated using 2x2 Jones matrix modelling [24-26]. [Pg.137]

For outdoor applications, the displayed images of a transmissive LCD could be washed out by sunlight A reflective LCD would be a better choice. However, such a reflective display is unreadable in dark ambient conditions. Transflective LCDs integrate the features... [Pg.235]

In an attempt to overcome the above drawbacks and take advantage of both reflective and transmissive LCDs, transflective LCDs have been developed to use the ambient light when available and the backlight only when necessary [5]. A transflective LCD can display images in both transmissive mode (T-mode) and reflective mode (R-mode) simultaneously or independently. Since LC material itself does not emit hght, the transflective LCD must rely on... [Pg.285]

Figure 2.2 The transparent electrodes in an LCD are coated with crossed polarizers. The liquid crystals (depicted as slender lozenges) form helices, thereby guiding polarized light from the upper electrode through the LCD, enabling transmission through to the lower polarizer. This is why the display has no colour. The helical structure is destroyed when a voltage is applied, because the polar liquid crystals align with the electrodes field. No light can transmit, so the display looks black... Figure 2.2 The transparent electrodes in an LCD are coated with crossed polarizers. The liquid crystals (depicted as slender lozenges) form helices, thereby guiding polarized light from the upper electrode through the LCD, enabling transmission through to the lower polarizer. This is why the display has no colour. The helical structure is destroyed when a voltage is applied, because the polar liquid crystals align with the electrodes field. No light can transmit, so the display looks black...
The simulation discussed above was based on full color produced by individual red, green, and blue emitters. Other full-color reproduction approaches have been proposed for OLED displays including color from blue emitter by means of energy down conversion fluorescent filter [177], and color from white emitters by means of transmission color filter sets similar to that used in LCD industry [178,179]. Table 1.5 compares the EL efficiency of equivalent white... [Pg.32]

Figure 5.7 Schematic of colour filter for LCD display. % Transmission... Figure 5.7 Schematic of colour filter for LCD display. % Transmission...
G.3.3.3 Liquid Crystal Displays (LCDs). Liquid crystalline polymers, first intro-dnced in Section 1.3.6.3, are ntilized for a different type of computer and television display, the liquid crystal display (LCD). Most of today s laptop computers and handheld devices ntilize color flat panel displays where the light transmission from the... [Pg.671]

Umeda, H. and Oka, W., Development of a transmissive a-Si TFT LCD with transparent flexible substrate, 11th International Display Workshops IDW 04, Niigata, Japan, 2004. [Pg.319]

A numerical evaluation of the maximum number of lines that can be multiplexed with such a single-frequency scheme requires specification of the acceptable viewing angle, temperature dependence of the various parameters, and so on see Kahn and Birecki (1980). The present upper limit appears to be about 25 lines for a direct view, temperature-compensated TN LCD and 91 for a transmission display, but further progress in LC chemistry will increase this number in the future. [Pg.120]

Figure 2.15 Schematic representation of a typical plot of the transmission versus applied voltage for an LCD with multiplexed addressing. Vs and V s tire the select and the non-select voltages, respectively. ... Figure 2.15 Schematic representation of a typical plot of the transmission versus applied voltage for an LCD with multiplexed addressing. Vs and V s tire the select and the non-select voltages, respectively. ...
Gooch and Tarry plot of transmission versus the coefficient, u, and the corresponding birefringence values, An, for a Twisted Nematic Liquid Crystal Display TN-LCD of thickness 6.55 pm operating between parallel polari-... [Pg.63]

Figure 3.17 Schematic representation of the transmission against voltage for a guest-host LCD. Figure 3.17 Schematic representation of the transmission against voltage for a guest-host LCD.

See other pages where Transmissive LCDs is mentioned: [Pg.551]    [Pg.451]    [Pg.134]    [Pg.287]    [Pg.235]    [Pg.236]    [Pg.285]    [Pg.285]    [Pg.286]    [Pg.327]    [Pg.417]    [Pg.86]    [Pg.124]    [Pg.551]    [Pg.451]    [Pg.134]    [Pg.287]    [Pg.235]    [Pg.236]    [Pg.285]    [Pg.285]    [Pg.286]    [Pg.327]    [Pg.417]    [Pg.86]    [Pg.124]    [Pg.203]    [Pg.623]    [Pg.463]    [Pg.882]    [Pg.3]    [Pg.6]    [Pg.28]    [Pg.32]    [Pg.55]    [Pg.56]    [Pg.62]    [Pg.63]    [Pg.63]    [Pg.75]    [Pg.75]    [Pg.85]    [Pg.85]    [Pg.87]    [Pg.87]    [Pg.90]    [Pg.112]    [Pg.115]    [Pg.183]    [Pg.451]   
See also in sourсe #XX -- [ Pg.251 ]




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