Adjusting the picture automatically

CONTENTS

34

Remote control

INPUT ON/STANDBY

LASER

KEYSTONE

AUTO

SET

AUTO SET

 

 

You can adjust the optimum horizontal position, vertical position, sampling phase and sampling frequency for projecting analog RGB signals at the touch of a button.

1

Input full screen video signals from the input

source (computer) and project the image.

Adjustments may not be performed properly for images that are not displayed on the entire screen or for extremely dark images.

L-CLICKR-CLICK

VOLUME/ADJUST

MENU ENTER EXIT

2 SET

AUTO SET

Press AUTO SET.

The horizontal position, vertical position, sampling phase and sampling frequency are adjusted automatically.

The icon appears during signal processing.

Operations

PIP FREEZE

RESIZE

CALL MUTE

Control panel (Main unit side)

 

 

 

 

 

 

 

ON / STANDBY

 

 

 

 

 

 

 

 

 

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ON

LAM

 

EMP

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EXI

 

 

 

 

 

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VOL / ADJ

 

 

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AUTO SET

Notes

•Automatic adjustment may not be performed properly for signals other than those computers’ signals with which the projector is compatible.

•The horizontal position, vertical position, sampling phase and sampling frequency can also be adjusted from the menu screen 47.

*Sampling frequency

Analog RGB signals input from the computer are converted into digital signals inside the projector. The sampling frequency is the number of times per second the analog signals are converted into digital signals. In order to capture (sample) each individual dot of the computer’s signals, the sampling frequency must be adjusted to match the computer’s dot clock frequency. If this adjustment is off, details of the image details may be blurred, a striped pattern may appear if images with many vertical lines are displayed, or the image’s width may change. For computer signals with which are projector-compatible, the sampling frequency is adjusted automatically even when the AUTO SET button is not pressed.

*Sampling phase

The sampling phase is the timing at which the computer’s analog RGB signals are sampled. If the sampling phase is off, the individual dots cannot be sampled at the proper timing, resulting in blurred or flickering images.

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Image 34
Toshiba TLP780U TLP781U owner manual Adjusting the picture automatically, Input full screen video signals from the input
Page 33 Page 35

TLP780U TLP781U specifications

The Toshiba TLP780U and TLP781U are opto-isolators designed to provide excellent performance in various applications, ensuring high levels of electrical isolation between input and output circuits. These devices are part of Toshiba's extensive portfolio of opto-couplers, which leverage advanced technologies to meet the demands of modern electronic systems.

One of the most notable features of the TLP780U and TLP781U is their high isolation voltage, which is rated up to 5000Vrms. This is particularly important in applications where safety and protection of sensitive components from high voltages are crucial. By providing robust electrical isolation, these opto-isolators help in preventing damage from voltage spikes and interference.

Both the TLP780U and TLP781U utilize a high-speed GaAlAs infrared LED as the light source, coupled with a phototransistor on the output side. This configuration enables rapid data transmission, making these devices suitable for high-speed applications. The TLP780U boasts a high-speed variant, while the TLP781U is designed for lower-speed requirements, offering flexibility depending on the application's needs.

In terms of package design, the TLP780U and TLP781U come in a compact and reliable DIP (Dual In-line Package) configuration. This allows for easy integration into printed circuit boards (PCBs), while also ensuring stable performance in various operational environments. Their compact size is particularly beneficial in space-constrained applications.

Another important characteristic of these devices is their wide operating temperature range, from -40°C to 100°C. This wide range ensures reliable operation in diverse environments, making them suitable for industrial, automotive, and consumer applications. This reliability is further enhanced by the devices' long operational lifespan, reducing the need for frequent replacements.

In summary, the Toshiba TLP780U and TLP781U opto-isolators deliver essential electrical isolation, high-speed performance, and versatile operational capabilities. Their combination of advanced technologies and robust features positions them as ideal solutions for interfacing circuits, signal isolation, and data transmission in various industries. Whether for safety-critical systems or general signal processing, these opto-isolators provide the performance and reliability needed in today's electronic designs.
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