Correcting the keystone distortion

CONTENTS

35

Remote control

A picture may be expanded on the upper side if projected upward from the projector lifted up by the foot adjuster. The projector can correct this keystone distortion.

Before correction

After correction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ON /

 

 

 

 

STANDBY

 

 

INPUT

 

 

 

1

KEYSTONE

 

AUTO SET

 

FREEZE

MUTE

 

 

 

PIP

CALL

RESIZE

 

 

 

 

MENU

 

 

 

VOL / ADJ

 

 

2

ENTER

CT-90113

EXIT

3

 

 

 

 

1 KEYSTONE

KEYSTONE

Press KEYSTONE.

The keystone adjustment menu appears, with the “Auto. V- keystone” being selected. (This menu is the same as the sub- menu which is displayed when “Correct the keystone distortion of the screen” is selected from GUIDE MENU. 45 )

Operations

Control panel (Main unit side)

 

 

 

ON / STANDBY

 

 

 

 

P

T

EMP

 

 

ON

LAM

 

F

 

 

 

 

AN

 

R

 

 

 

EXI

TE

 

 

 

EN

 

 

 

 

T

U

 

 

 

 

A

 

 

 

 

UT

N

 

 

 

 

O

2 ENTER

ENTER

Press ENTER.

The vertical keystone distortion on the picture projected is automatically corrected.

The icon appears while the keystone correction is executing.

When the correction is finished, the menu for selecting

“V-keystone” or “H-keystone” by manual adjustment appears, with the former being selected.

 

 

 

 

E

 

S

 

 

 

 

M

 

ET

 

 

 

 

 

 

K

 

 

 

 

 

 

E

 

 

 

U

T

 

Y

 

 

 

 

S

 

N

P

 

 

T

I

 

 

 

O

 

 

 

 

N

 

 

 

 

VOL / ADJ

E

 

 

 

 

 

 

2

3

1

Confirm the keystone distortion.

3

EXIT

When no more adjustment is needed, press the EXIT button

repeatedly until the menu disappears.

 

EXIT

 

 

If the keystone distortion has not been corrected properly, adjust it according to the next procedure.

Continued

Page 35
Image 35
Toshiba TLP381, TLP380 owner manual Correcting the keystone distortion, Press Keystone, Confirm the keystone distortion

TLP381, TLP380 specifications

The Toshiba TLP380 and TLP381 are advanced optoisolators designed for various applications requiring reliable isolation and switching control. These devices are particularly valuable in communication, industrial, and consumer electronics, where signal integrity and noise immunity are crucial.

The TLP380 is a phototransistor optoisolator, featuring a gallium arsenide infrared LED and a phototransistor. With a minimum isolation voltage of 5,000 VRMS, it provides high voltage isolation between input and output, making it an excellent choice for protecting sensitive components from high voltages and surges. The TLP380 offers a high-speed switching capability, with a rise time of around 4 μs, enabling it to transmit signals efficiently in digital circuits.

On the other hand, the TLP381 is also a phototransistor optoisolator but specifically optimized for lower input current, making it more power-efficient. It offers similar isolation voltage ratings and switching characteristics to the TLP380, but with a lower input current threshold, which can be particularly advantageous in battery-powered applications. The lower current requirement helps extend battery life and minimizes power consumption in portable devices.

Both TLP380 and TLP381 devices feature a wide temperature range, making them suitable for various environmental conditions. Their operating temperature ranges from -40°C to +100°C, ensuring reliable performance under extreme conditions. Additionally, with their compact DIP packages, they are easy to integrate into crowded PCB layouts, making them a preferred choice for designers targeting space-constrained applications.

In terms of characteristics, both models provide low output voltage saturation and high-speed operation, which are critical in achieving fast response times in control circuits. The combination of robust isolation, efficient power consumption, and temperature stability makes the TLP380 and TLP381 versatile solutions for isolating signals in a myriad of electronic systems.

In summary, the Toshiba TLP380 and TLP381 optoisolators are engineered for high-performance signal isolation, offering superior technologies and characteristics that cater to a range of applications. Their reliability, efficiency, and compact design make them a compelling choice for engineers and designers looking to enhance their electronic systems.