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TK.

LCD Benchmark

13 posts in this topic

Ever wanted to know the performance of your LCD?

-> please find a benchmark in the MIOS Download section.

From the header:

;
; LCD Performance Measuring Application
;
; This is some kind of benchmark which helps to evaluate the performance
; of various character and graphical displays, as well as the execution
; speed of a custom LCD driver
;
; 16 characters are print 4 times (-> 64 characters), the execution time 
; is measured with timer3, prescaler 1:8 - this means, that the counter 
; result has to be multiplied by 8 and 100 nS (@40 MHz) to get the
; absolute delay
;
; The result will be print on LCD, but also sent via MIDI
; (F0 <hex-digit 1> <hex-digit 2> <hex-digit3> <hex-digit4> F7, MSB first)
;
; And here the results:
;
; Displaytech LCDs from Reichelt:
;    o 2x16 KS0070B (HD44780 compatible):        3252 * 8 * 100 nS = 2.60 mS
;    o 2x20 KS0076B/KS0063 (HD44780 compatible): 3177 * 8 * 100 nS = 2.54 mS
;    o 2x40 KS0076B/KS0063 (HD44780 compatible): 3056 * 8 * 100 nS = 2.44 mS
;    o KS0107/0108 based 240x64 GLCD (sold out): 6124 * 8 * 100 nS = 4.90 mS
;
; For reference: 2x40 with 4-bit interface, nearly no difference!
;    o 2x40 KS0076B/KS0063 (HD44780 compatible): 3108 * 8 * 100 nS = 2.48 mS
;
; Various displays:
;    o Matrix Orbital via IIC:           4612 * 8 * 100 nS =  3.69 mS
;    o T6963C in vertical mode:              10647 * 8 * 100 nS =  8.51 mS
;    o T6963C in horizontal mode:       37420 * 8 * 100 nS = 29.93 mS (!!!)

Have fun - and publish your results here! :-)

Best Regards, Thorsten.

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Displaytech ruuulz!  ;D

Just wish Reichelt would offer them with more background colors (I LOVE those black background, red fonts LCDs).

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For Australian MidiBox builders, the backlit 2 x 16 LCD display from Dick Smith (Product no. Z4172) has the following performance:

3339 * 8 * 100 nS = 2.67mS

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I have a LCD 2x20 from display-elektronik, green with light.

Benchmark result: 3000 x 8 x 100nS = 2.40mS

chriss

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A Sharp LM402 2x40 (EUR 17,- at Ebay):

5155 * 8 * 100nS = 4,124mS

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From the same guy Benni got his display: A 2x40 LCD with blue(!) backlighting - great price:

DM4020 (TDK-T34V): 2,34 ms  (!!)

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A 2*40 display Powertip PC-4002D with unknown controller (blobs):

3270 * 8 * 100nS = 2,616 mS

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Some more info for you, copied from this post:

CFAP2002A-Y-ECS (OLED):

1868 * 8 * 100nS ~= 1.49mS

CFAH2002A-RMI-JP (LCD):

3231 * 8 * 100nS ~= 2.58mS

This is with a PIC18F4620 with standard display (LCD) connection.

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OK, My LCD's are from http://www.lcds.shopeio.com/inventory/category.asp?cat=Lcds

Test results are:

Seiko L4042B1L 2x40 on my MBSEQv2:

Results: 4007 *8 *100 nS

Seiko L1642B1L 2x16 for testing the core:

Results: 4066 *8 *100 nS

cheers!!

EDIT: These LCD's needs negative voltage for good contrast results. I used MAX1044 chip to supply -2v.

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I've bought two Displays at ebay - for my SEQv3  ;)

PMC4002A7-SBLW - 2x40 - blue/white

3265 *8 *100nS = 2,612mS

This is a good value !?! Isn't it?  ;D

910_PMC4002A7-SBLW_jpge2236d572c50ba7cb1

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Mouser Part #:  763-NHD-0216PZ-FLYBW

Manufacturer Part #: NHD-0216PZ-FL-YBW

Manufacturer: Newhaven Display

Description: LCD Character Displays 2 x 16 STN-Y/G 80.0 x 36.0

2.4504ms

i know it's an old topic but i was playing around...

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i know it's an old topic but i was playing around...

this is one of those everlasting threads, additions are welcome/encouraged :)

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