78 results about "Test screen" patented technology

Method for determining a more efficient quality assurance or reliability test screen without falsely rejecting, i.e., over stressing, short channel length devices during voltage stress test screening. Short channel lengths devices fabricated on a semiconductor wafer have a higher tendency to fail at voltage levels that would otherwise not harm long channel length devices. The failures, however, are not related to device defects. Protection to the more vulnerable devices is provided by determining the speed of the die prior to the voltage test screen, thus, segregating the devices based on operational speed performance. Next, a lower voltage is effetively applied during wafer probe test to the faster devices, which directly correspond to the population of short channel devices.

The invention provides a method for establishing a luminance compensation model, a screen luminance compensation method and a screen luminance compensation device. The establishing method comprises the following steps: lightening a tested screen, and accumulating luminous quantity of the tested screen; respectively calculating the corresponding luminance compensation coefficient of the tested screen when the luminous quantity of the tested screen is accumulated to a luminous quantity threshold interval of different value ranges; establishing a luminance compensation model, and storing a corresponding relationship between the luminous quantity threshold interval and the luminance compensation coefficient. The compensation method comprises the following steps: accumulating luminous quantity of a target screen; determining a luminance compensation coefficient of the target screen under the current historical luminous quantity from the luminance compensation model based on a preset luminous quantity threshold interval to which the current historical luminous quantity belongs in the target screen; performing picture compensation on the target screen based on the determined luminance compensation coefficient. According to the scheme of the invention, luminance compensation can be adaptively performed on the user side according to the screen aging stage, so that the display quality of the screen is maintained.

The invention discloses a display screen uniformity test method, a terminal and a computer readable storage medium. The display screen uniformity test method comprises the steps of: acquiring a display state picture of a to-be-tested screen, acquiring an effective region of the display state picture, and regarding the effective region as a test picture corresponding to the to-be-tested screen; acquiring a preset sample picture, and calculating a sample mean value of pixel values corresponding to the sample picture; and acquiring test pixel values corresponding to the test picture, comparing the test pixel values with the sample mean value, and determining a test result of uniformity of the to-be-tested screen according to a comparison result. The test result of the display screen uniformity test method can precisely reflect the overall uniformity of the to-be-tested screen; meanwhile, the test can be completed without technical personnel performing related technical operations, therebyavoiding test deviation caused by human factors, improving the precision of the test result, being conductive to reducing the time spent on the test and improving the efficiency of the uniformity test.

The invention discloses a data debugging method, a device and a system thereof, wherein the method, the device and the system relate to the field of displaying technology. The method, the device and the system mainly aims to settle the following problems in performing data debugging: several debugging times, time wastage in a debugging process, artificial assistance in the debugging process, and debugging error appearance probability. The method comprises the steps of determining a target black-and-white voltage, and transmitting a control instruction for switching a picture to a white picturewhich corresponds with the target black-and-white voltage to lighting testing equipment, wherein the lighting testing equipment performs controlling on a to-be-tested screen according to the controlinstruction, and the gray scale which corresponds with the white picture is highest; receiving an actually measured brightness value which is transmitted from brightness displaying equipment and corresponds with the white picture, wherein the brightness display equipment is used for acquiring and displaying the actually measured brightness value which corresponds with the white picture when the white picture is displayed on the to-be-tested equipment; and if the difference between the actually measured brightness value and a theoretical brightness value is smaller than a preset error threshold, adjusting the black-and-white voltage which corresponds with each gray scale in the Gamma curve.

The invention provides a method for testing screen color level. The method comprises the following steps: providing a display screen and a color scanner; dividing the display screen into 2 color block areas according to the bit number n of the display screen; setting different primary color level values for the color block areas so that each color block area in the 2 color block areas corresponds to a corresponding color level grade in 2 color level grades; displaying the color block areas and colors corresponding to the primary color level values set on the color block areas on the display screen; scanning all color block areas on the display screen through the color scanner, and acquiring the color level value of each scanned color block area as an output color level value of each color block area; and analyzing the color level display performance of the display screen according to the output color level value of each color block area. The invention also provides a device for testing the screen color level. The method and the device can test the color level of the display screen once so as to save test time and improve test efficiency.