LED DISPLAY DEVICE HAVING SCREEN TEST FUNCTION
PROBLEM TO BE SOLVED: To provide an LED display device having a screen test function to efficiently identify visually a failure point on an LED unit constituting a screen.SOLUTION: A screen test circuit section 170 includes: a first multiplier 171a that multiplies a piece of image input data which i...
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| creator | WAKASUGI NORIYOSHI HANAMURA TOSHIAKI OKAMOTO TAKASHI |
| description | PROBLEM TO BE SOLVED: To provide an LED display device having a screen test function to efficiently identify visually a failure point on an LED unit constituting a screen.SOLUTION: A screen test circuit section 170 includes: a first multiplier 171a that multiplies a piece of image input data which is input from an image memory 160 by a predetermined transmission factor α; a second multiplier 171b that multiplies a selected test color by a transmission factor (1-α); an adder 172 that adds a piece of data output from the first multiplier 171a and a piece of data output from the second multiplier 171b; and a selector 173a that selects either the image input data or the data output from the adder 172 based on a screen test area selection signal to output the selected data as an image to be displayed on the screen. |
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| subjects | ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION CRYPTOGRAPHY DISPLAY DISPLAYING EDUCATION LABELS OR NAME-PLATES PHYSICS SEALS SIGNS |
| title | LED DISPLAY DEVICE HAVING SCREEN TEST FUNCTION |
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