Refresh rate for a new LED TV...
Hey guys,
It's been a few years, and it's time to upgrade my TV.
A few questions on the refresh rate. Aside from watching movies, I like to play games (on PS4, when I can buy it), and watching primarily sports.
So, in essence, I'm assuming I'd be one who would notice a higher refresh rate? Is there a noticeable difference from 60hz, to 120hz, to 240hz?
Thanks!
Some thoughts...
how much is calibration? how much is that TV?
some say TV's should be calibrated again after 6 months of usage where the TV has had some break-in. How much is that second calibration???
some say they just run on theatre or cinema mode to save costs
some say they don't like the calibration and flip back to the normal, bright or vivid mode. Personally I hate to see the highlights punched out and looseing detail for the brightness
some purchase Spyder or XRite calibration tools
some will use Apps to do their own calibration (note you need a cable or a wireless box), however you don't want someone who is colorblind making those calibration decisions (like me)
https://itunes.apple.com/ca/app/thx-tune-up/id592624594?mt=8
http://www.pcmag.com/article2/0,2817,2414804,00.asp
http://www.youtube.com/watch?v=rOoizmYBHlo&hd=1
When shopping for a TV I visited several retailers. For the stores who calibrated their displays.... I had a tough time deciding which one to get because they were ALL good. I could not tell which one was LCD, LED, or Plasma. Yes calibration is worth it, but how much do you want to spend?
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Last edited by AleXoundOS (2009-11-04 12:27:09)thank you for replies
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Refresh rate for Numeric Indicator
I have application that displays 60 16 bit word of data in Hex format on the screen simulatanousely as I receive block of data at at approximately 10,000 times a second through USB. Obviously, at this 10,000Hz rate, it is an over-kill in terms of the human eye visually processing at that rate. Does anyone know what is the screen update rate for numberic indators and is there a way of controlling it. I was trying to see if I could set it for 10Hz.
Thanks.
PaulLet me clarify my question:
I have a project which could send data to the screen at a rapid rate (think oscope). I do not want this to slow down the program more than necessary. The data will be grabbed in a loop and displayed to the screen (and possibly enqueued for extra processing).
It is my understanding that if I simply wire it to an indicator (yes I suppose this was a typo) or local variable it will be handled nicely, i.e. sent to an update buffer to handle screen updates at an appropriate rate.
However I would like to encapsulate my GUI (either using an action engine with USRs or a class) and so was planning on having references to all my controls and indicators within this encapsulation.
So again, my question is this: Is there a way to write to an indicator (or control) via the reference while still having the advantages (speed/display buffer) of a local variable?
Secondary question:
Where is the best place to find information on all the various efficiencies LabVIEW has built in. For example, in my last project I was actually writing my data to a separate queue which was dequeued in a loop with a built in delay and only the most recent item was written to the screen and the rest deleted. In other words, I had no idea LabVIEW already handled this in the background and I would like to know what else LabVIEW already takes care of for me.
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Refresh rate for logicaldisk - free megabytes (performancecounter)
The time interval for the PerformanceCounter("LogicalDisk", "Free Megabytes") counter appears to be 300 seconds.
Calling .NextValue() repeatedly within this five minute interval will yield the same result as you are seeing.
Is this a bugs or behavior ?
If is a behavior, what is the reason behind for logicalDisk - Free Megabytes has 5 minutes interval update however the other counters are 1 seconds interval ?Hello MaleCoder,
Yes, I reproduced this scenario as you mentions, the logicalDisk - Free Megabytes has 5 minutes interval update, however, since there is not a specific document for the CategoryName property, it is not clear why it performs a 300s interval update. My suggestion
is that you could post this feedback to the team:
https://connect.microsoft.com/VisualStudio
If your goal is to monitor the disk usage, you could have a try with the WMI approach:
System.Management.ManagementScope scope =
new System.Management.ManagementScope(@"\\remotemachinename\root\cimv2");
ObjectQuery query =
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ManagementObjectSearcher search = new ManagementObjectSearcher(scope, query);
ManagementObjectCollection results = search.Get();
foreach (ManagementObject mo in results)
Console.WriteLine("Drive: {0} -- Free Space: {1}", mo["Name"], mo["FreeSpace"]);
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What is the defaults refresh rate of the Mac book pro 15inch?
What is the defaults refresh rate of the Mac book pro 15inch? and how can I change it?
I don't believe there is a refresh rate for LCD or LED monitors. Refresh rate is something that is used for old style CRTs if i'm not mistaken.
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Does anyone know the refresh rate of the new iMac? The reason I am asking is low refresh rates sometimes gives me a headache and I can't seem to find this info any where on apple's site. I have a feeling I am not looking in the right section but I'm not totally sure.
Thanks,
TonyThere is NO Refresh Rate on LCD screens. That number is for the times per second the Scanning Guns of a CRT monitor redraws the screen, usually in the 60 to 75 (also could be as high as 85) times a second the screen is scanned/redrawn.
You can see that if you take a picture at a fast shutter speed of a CRT TV or computer monitor as part of the screen will be black or dark.
With a LCD screen it is redrawn all at the same time and is basically continuous.
If you are getting headaches from LCD screens then there is something wrong with the screen or your head.
Although with the new LED backlit screens it does pulsate the LEDs as they are One brightness, constant, and the way they lower the screen brightness is to turn the LED lights on and off at different rates to simulate a dimmer screen brightness.
There is a Long thread on this on this forum. -
I'm running Solaris Express 10 x86 4/05 on a Dell Optiplex GX260. Xorg refuses to give me a refresh rate higher than 60Hz. This is using the i810 driver but it also happens with the VESA driver. Here's my xorg.conf:
Section "Module"
# This loads the DBE extension module.
Load "dbe" # Double buffer extension
# This loads the miscellaneous extensions module, and disables
# initialisation of the XFree86-DGA extension within that module.
SubSection "extmod"
Option "omit xfree86-dga" # don't initialise the DGA extension
EndSubSection
# This loads the font modules
Load "bitstream"
Load "type1"
# Load "speedo"
# This loads the Xst module
Load "Xst"
# This loads the SolarisIA module
Load "IA"
# This loads the GLX module
# Load "glx"
# This loads the DRI module
# Load "dri"
EndSection
# Files section. This allows default font and rgb paths to be set
Section "Files"
# The location of the RGB database. Note, this is the name of the
# file minus the extension (like ".txt" or ".db"). There is normally
# no need to change the default.
RgbPath "/usr/X11/lib/X11/rgb"
# Multiple FontPath entries are allowed (which are concatenated together),
# as well as specifying multiple comma-separated entries in one FontPath
# command (or a combination of both methods)
FontPath "/usr/X11/lib/X11/fonts/TrueType/"
FontPath "/usr/X11/lib/X11/fonts/Type1/"
FontPath "/usr/X11/lib/X11/fonts/Type1/sun/"
FontPath "/usr/X11/lib/X11/fonts/F3bitmaps/"
FontPath "/usr/X11/lib/X11/fonts/misc/"
FontPath "/usr/X11/lib/X11/fonts/100dpi/"
FontPath "/usr/X11/lib/X11/fonts/75dpi/"
# FontPath "/usr/X11/lib/X11/fonts/local/"
# FontPath "/usr/X11/lib/X11/fonts/Speedo/"
# FontPath "/usr/X11/lib/X11/fonts/freefont/"
# The module search path. The default path is shown here.
# ModulePath "/usr/X11/lib/modules"
EndSection
# Server flags section.
Section "ServerFlags"
# Uncomment this to cause a core dump at the spot where a signal is
# received. This may leave the console in an unusable state, but may
# provide a better stack trace in the core dump to aid in debugging
# Option "NoTrapSignals"
# Uncomment this to disable the <Crtl><Alt><Fn> VT switch sequence
# (where n is 1 through 12). This allows clients to receive these key
# events.
# Option "DontVTSwitch"
# Uncomment this to disable the <Crtl><Alt><BS> server abort sequence
# This allows clients to receive this key event.
# Option "DontZap"
# Uncomment this to disable the <Crtl><Alt><KP_+>/<KP_-> mode switching
# sequences. This allows clients to receive these key events.
# Option "Dont Zoom"
# Uncomment this to disable tuning with the xvidtune client. With
# it the client can still run and fetch card and monitor attributes,
# but it will not be allowed to change them. If it tries it will
# receive a protocol error.
# Option "DisableVidModeExtension"
# Uncomment this to enable the use of a non-local xvidtune client.
# Option "AllowNonLocalXvidtune"
# Uncomment this to disable dynamically modifying the input device
# (mouse and keyboard) settings.
# Option "DisableModInDev"
# Uncomment this to enable the use of a non-local client to
# change the keyboard or mouse settings (currently only xset).
# Option "AllowNonLocalModInDev"
EndSection
# Input devices
# Core keyboard's InputDevice section
Section "InputDevice"
Identifier "Keyboard1"
Driver "Keyboard"
# For most OSs the protocol can be omitted (it defaults to "Standard").
# When using XQUEUE (only for SVR3 and SVR4, but not Solaris),
# uncomment the following line.
# Option "Protocol" "Xqueue"
Option "AutoRepeat" "500 30"
# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds" "1 2 3"
# Option "LeftAlt" "Meta"
# Option "RightAlt" "ModeShift"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults). For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc105"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:swapcaps"
# These are the default XKB settings for Xorg
# Option "XkbRules" "xorg"
# Option "XkbModel" "pc105"
# Option "XkbLayout" "us"
# Option "XkbVariant" ""
# Option "XkbOptions" ""
# Option "XkbDisable"
Option "XkbRules" "xorg"
Option "XkbModel" "pc101"
Option "XkbLayout" "us"
EndSection
# Core Pointer's InputDevice section
Section "InputDevice"
# Identifier and driver
Identifier "Mouse1"
Driver "mouse"
Option "Protocol" "Auto"
Option "Device" "/dev/mouse"
# Mouse-speed setting for PS/2 mouse.
# Option "Resolution" "256"
# When using XQUEUE, comment out the above two lines, and uncomment
# the following line.
# Option "Protocol" "Xqueue"
# Baudrate and SampleRate are only for some Logitech mice. In
# almost every case these lines should be omitted.
# Option "BaudRate" "9600"
# Option "SampleRate" "150"
# Emulate3Buttons is an option for 2-button Microsoft mice
# Emulate3Timeout is the timeout in milliseconds (default is 50ms)
Option "Emulate3Buttons"
# Option "Emulate3Timeout" "50"
# ChordMiddle is an option for some 3-button Logitech mice
# Option "ChordMiddle"
EndSection
# Other input device sections
# this is optional and is required only if you
# are using extended input devices. This is for example only. Refer
# to the xorg.conf man page for a description of the options.
# Section "InputDevice"
# Identifier "Mouse2"
# Driver "mouse"
# Option "Protocol" "MouseMan"
# Option "Device" "/dev/mouse2"
# EndSection
# Section "InputDevice"
# Identifier "spaceball"
# Driver "magellan"
# Option "Device" "/dev/cua0"
# EndSection
# Section "InputDevice"
# Identifier "spaceball2"
# Driver "spaceorb"
# Option "Device" "/dev/cua0"
# EndSection
# Section "InputDevice"
# Identifier "touchscreen0"
# Driver "microtouch"
# Option "Device" "/dev/ttyS0"
# Option "MinX" "1412"
# Option "MaxX" "15184"
# Option "MinY" "15372"
# Option "MaxY" "1230"
# Option "ScreenNumber" "0"
# Option "ReportingMode" "Scaled"
# Option "ButtonNumber" "1"
# Option "SendCoreEvents"
# EndSection
# Section "InputDevice"
# Identifier "touchscreen1"
# Driver "elo2300"
# Option "Device" "/dev/ttyS0"
# Option "MinX" "231"
# Option "MaxX" "3868"
# Option "MinY" "3858"
# Option "MaxY" "272"
# Option "ScreenNumber" "0"
# Option "ReportingMode" "Scaled"
# Option "ButtonThreshold" "17"
# Option "ButtonNumber" "1"
# Option "SendCoreEvents"
# EndSection
# Monitor section
# Any number of monitor sections may be present
Section "Monitor"
Identifier "My Monitor"
# HorizSync is in kHz unless units are specified.
# HorizSync may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
HorizSync 30-85
# HorizSync 30-64 # multisync
# HorizSync 31.5, 35.2 # multiple fixed sync frequencies
# HorizSync 15-25, 30-50 # multiple ranges of sync frequencies
# VertRefresh is in Hz unless units are specified.
# VertRefresh may be a comma separated list of discrete values, or a
# comma separated list of ranges of values.
# NOTE: THE VALUES HERE ARE EXAMPLES ONLY. REFER TO YOUR MONITOR'S
# USER MANUAL FOR THE CORRECT NUMBERS.
VertRefresh 48-120
EndSection
# Graphics device section
# Any number of graphics device sections may be present
# Standard VGA Device:
Section "Device"
Identifier "Standard VGA"
VendorName "Unknown"
BoardName "Unknown"
# The chipset line is optional in most cases. It can be used to override
# the driver's chipset detection, and should not normally be specified.
# Chipset "generic"
# The Driver line must be present. When using run-time loadable driver
# modules, this line instructs the server to load the specified driver
# module. Even when not using loadable driver modules, this line
# indicates which driver should interpret the information in this section.
Driver "vga"
# The BusID line is used to specify which of possibly multiple devices
# this section is intended for. When this line isn't present, a device
# section can only match up with the primary video device. For PCI
# devices a line like the following could be used. This line should not
# normally be included unless there is more than one video device
# intalled.
# BusID "PCI:0:10:0"
# VideoRam 256
# Clocks 25.2 28.3
EndSection
# Device configured by xorgconfig:
Section "Device"
Identifier "** Intel i810 (generic) [i810]"
Driver "i810"
VideoRam 8192
# Insert Clocks lines here if appropriate
EndSection
# Screen sections
# Any number of screen sections may be present. Each describes
# the configuration of a single screen. A single specific screen section
# may be specified from the X server command line with the "-screen"
# option.
Section "Screen"
Identifier "Screen 1"
Device "** Intel i810 (generic) [i810]"
Monitor "My Monitor"
DefaultDepth 24
Subsection "Display"
Depth 8
Modes "1024x768"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "1024x768"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1024x768"
ViewPort 0 0
EndSubsection
EndSection
# ServerLayout sections.
# Any number of ServerLayout sections may be present. Each describes
# the way multiple screens are organised. A specific ServerLayout
# section may be specified from the X server command line with the
# "-layout" option. In the absence of this, the first section is used.
# When now ServerLayout section is present, the first Screen section
# is used alone.
Section "ServerLayout"
# The Identifier line must be present
Identifier "Simple Layout"
# Each Screen line specifies a Screen section name, and optionally
# the relative position of other screens. The four names after
# primary screen name are the screens to the top, bottom, left and right
# of the primary screen. In this example, screen 2 is located to the
# right of screen 1.
Screen "Screen 1"
# Each InputDevice line specifies an InputDevice section name and
# optionally some options to specify the way the device is to be
# used. Those options include "CorePointer", "CoreKeyboard" and
# "SendCoreEvents".
InputDevice "Mouse1" "CorePointer"
InputDevice "Keyboard1" "CoreKeyboard"
EndSection
# Section "DRI"
# Mode 0666
# EndSectionIf I use the Xsun server, everything works great. I get 1024x768 at 85Hz. With Xorg, I get 1024x768 at 60Hz. Why won't Xorg drive the display at a decent refresh rate?
Thanks.I upped the log verbosity on Xorg and checked the Xorg.0.log file. I found some interesting things.
First, I found this line:
(II) I810(0): Will use BIOS call 0x5f05 to set refresh rates for CRTs.
Later on, I found these:
(WW) I810(0): Extended BIOS function 0x5f05 not supported.
(II) I810(0): BIOS call 0x5f05 not supported, setting refresh with VBE 3 method.
(WW) I810(0): Set VBE Mode rejected this modeline.
Trying standard mode instead!
Presumably, "standard mode" is an eye-watering 60Hz.
This is on a Dell Optiplex GX260 with BIOS revision A09. The video chipset is an onboard Intel 82845 and the driver is Xorg's i810.
Everything works fine with Sun's X server. I get a nice 87Hz refresh at 1024x768. I'm surprised that Xorg can't set the refresh on this machine. It's listed as Test Suite Level 2 certified in the HCL. Unless somebody can tell me what I'm doing wrong here, I'm going to post this incompatibility as a comment on the HCL. -
To try to get my new Samsung LN-R268W monitor to show what's on the screen of my Power Book G4 (OS 10.4.5), the lady at Samsung Customer Support said I need to make sure my Refresh Rate is 60 hertz. System Preferences>Displays>Color LCD>Display had the Refresh Rate showing a greyed-out "n/a." Advice?
Is this before or after you've got the image on your
Samsung? If it's before you've connected it, or used
the F7 key to toggle to mirror/span mode, the only
display you'll see under System Preferences is the
built in display. And the refresh rate for that will
be "n/a".
Most monitors will be auto-detected by OS X, and the
refresh rate will be set without any input. My 20"
widescreen Dell LCD automagically defaults to 60Hz.
At any rate, refresh rates for LCDs are kind of
meaningless - they don't actually refresh like old
CRT monitors do.
Is this before or after you've got the image on your
Samsung? If it's before you've connected it, or used
the F7 key to toggle to mirror/span mode, the only
display you'll see under System Preferences is the
built in display. And the refresh rate for that will
be "n/a".
Most monitors will be auto-detected by OS X, and the
refresh rate will be set without any input. My 20"
widescreen Dell LCD automagically defaults to 60Hz.
At any rate, refresh rates for LCDs are kind of
meaningless - they don't actually refresh like old
CRT monitors do.
You're right. Today I learned from talking to somebody that I should turn on my monitor before I turn on my laptop. Page 53 of the Apple manual "Getting Started With Your Powerbook G4" suggested the opposite. However, if I had read page 53 and its reference to page 97 more carefully, I would have checked the "mirroring" box.
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