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Benq FP751 [21/23] Important lcd parameters
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Benq LCD Color Monitor User's Guide
English 46
C. Comparison of standard and super TFT display
Important LCD parameters
A. Viewing angle
The viewing angle is the display's visible field. If one were to imagine a vertical line in the centre of
the image and to pivot up and down and to the right and to the left from that point, then that is the
viewing angle.†Working ergonomically requires a viewing angle of at least 60
°
/60
°
(right/left) hori-
zontally and 45
°
/45
°
vertically (up/down). If only two values are specified for horizontal and verti-
cal, the values for right and left, and for horizontal and vertical are added together. If this were the
case then this would provide a viewing angle of 120
°
horizontally and 90
°
vertically.
B. Contrast
Contrast is the ratio between the light intensity of the brightest and the darkest point of an image.
High contrast values improve readability and ergonomics.
A display should in all instances attain contrast values of 100:1. This is a point on which LCD mon-
itors are clearly superior to monitors.
C. Response time
The response time is the time, which a TFT cell requires to switch on and switch off. †For standard
applications a response time of a maximum of 70 ms (milliseconds) is sufficient. If a more rapid
image build-up is required (e.g. the multimedia field), then values of a maximum of 30 ms are
required.
D. Brightness
Brightness is the emitted luminous power over a specified area. Brightness is another point, on
which LCD monitors are superior to CRT devices. Traditional monitors create approx. 80 to 100
cd/m² (candela per meter square). In the case of LC displays, values below 150 cm/m² are not
acceptable.
Standard Super
h good gray level resolution
hF satisfactory viewing angle
h very good viewing angle
hsatisfactory gray level resolution
Field of applications:
hImage processing
hmedical field
hStandard workstation
hBanks (confidential area)
Field of applications:
his several people are working at one
screen.
hStandard workstation
hPresentation tasks
hBanks (public area)
Содержание
- 43 8cm lcd panel size 1
- Benq fp751 1
- Lcd color monitor 1
- User s manual 1
- Copyright 2
- Disclaimer 2
- Do not attempt to service this product yourself as opening or removing covers may expose you 2
- Never push objects of any kind or spill liquid of any kind into this product 2
- Safety instructions 2
- Slots and openings on the back or top of the cabinet are provided for ventilation they must n 2
- The ac adapter isolates this equipment from the ac supply 2
- The power supply cord serves as a power disconnect device for pluggable equipment the socket 2
- This product should be operated from the type of power indicated on the marking label if you 2
- Unplug this product from the wall outlet before cleaning do not use liquid or aerosol cleaner 2
- Adjusting the monitor 35 3
- Installation 6 3
- Specifications 44 appendix an introduction to lcd technology 45 3
- Table of contents 3
- Troubleshooting 41 3
- Unpacking 3 views of the monitor 4 3
- Unpacking 4
- Back view 1 5
- Front view 5
- Views of the monitor 5
- Back view 2 removal of rear cover and base cover 6
- A make sure that the computer and monitor s power are both turned off please follow the steps 7
- A make sure that the computer and monitor s power are both turned off please follow the steps to install your lcd monitor 7
- Hardware installation 7
- Installation 7
- B connect the audio cable to your computer 8
- C connect the signal cable which is directly attached to the monitor to the vga output of the 8
- D connect the power cord at the back of the monitor to an ac power socket please make sure tha 8
- Connect usb compatible devices such as a keyboard mouse and so on to any of 2 downstream conn 9
- Connect your usb hub to your computer with usb cable 9
- Insert the lock in the slot located on the rear of the monitor 9
- Monitor security lock installation 9
- Remove the key and store it in a safe place 9
- Turn the key to lock the security lock 9
- Usb installation optional 9
- Adjusting the monitor 10
- Brightness hot key 10
- Contrast hot key 10
- Hot key mode 10
- Look at the control panel 10
- Brightness 11
- Contrast 11
- Control functions available in main menu 11
- Main menu mode 11
- Press enter to enter adjustment menu use fly wheel to adjust brightness and then press exit to return to main menu 11
- Press enter to enter adjustment menu use fly wheel to adjust contrast ratio and then press exit to return to main menu or you can roll the fly wheel left to find this function 11
- Speaker volume hot key 11
- Frequently asked questions faq 16
- No image can be seen 16
- Pixel errors can be seen 16
- The image has a faulty colour appearance 16
- The image is blurred 16
- Troubleshooting 16
- Need more help 17
- Pixel errors 17
- The image is displaced in one direction 17
- The image is or distorted flashes or flickers 17
- Supported operating modes 18
- Specifications 19
- A the standard tft panel 20
- Appendix an introduction to lcd technology 20
- B the super tft panel 20
- Liquid crystals polarise incident light 20
- Principles of lcd technology 20
- The tft panel 20
- A viewing angle 21
- B contrast 21
- C comparison of standard and super tft display 21
- C response time 21
- D brightness 21
- Important lcd parameters 21
- A pixel errors 22
- Blurred image 22
- C multifrequency as opposed to multiscan 22
- Display errors 22
- Comparison of crt lcd monitors 23
- Summary 23
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