As per my experience you must try the high LCD refresh rate. It must be 85Hz or greater.
Use this one Refresh rate= pixel clock/number of clocks per frame.
It is also called stroboscopic effect because of external light flickering.
For this the display refresh frequency should not be a multiple of the frequency of light.
Hello Ervin ,
We are facing flickering problem only when control is transferred from bootloader to O.S , where frame buffer starting address will be switched (From BL to OS).
Once KIOSK application is up their is no flickering is observed . Is their any solution to avoid the flickering while switching the frame buffer starting address.
Regards,
Kishore P
Thank u...Problem has been solved
Hello Nagesh,
We are using imx233 processor and LCD display with the spec:
Resolution:320*240
Bus width:16bit
pixel clock:5 to 6.8MHz
LCD Display will start to flicker when control is transferred from bootloader to O.S , where frame buffer starting address will be changed. Please tell me what solution you are followed to overcome your problem , which may help to solve our problem.
Regards,
Kishore P
Perhaps we have so called stroboscopic effect because of external light flickering.
In such case display refresh frequency should not be a multiple of the frequency of light (60 hz).
HW to increase refresh rate to 85Hz??
Specs of LCD which i am using:
Resolution:320*240
Bus width:16bit
pixel clock:5 to 6.8MHz
I tried with increasing pixel clock upto 8MHz then also Flicker problem is still present.The same problem is even present in the i.MX233EVK.
Refresh rate= pixel clock/number of clocks per frame
I increased the pixel clock which in turn increases the refresh rate.Then also problem was still there.
Is there any other parameter to increase refresh rate or is it some other parameter which is causing this problem?
You need use high LCD refresh rate. Try use 85Hz or higher.