Analysis of the brightness problem of the strip LCD screen and the long strip LCD screen, I believe that friends who have known it will know that the specifications of the strip LCD screen and the LCD strip screen are often non-standard, so they are also called non-standard strip screens, long strip screens. Screen. The size of the bar LCD screen is non-standard, but the value of brightness is an important indicator of the quality of a bar LCD screen.
1, the brightness measurement tool of the bar-shaped LCD screen
A luminance meter is used when measuring the brightness of the bar LCD screen and the LCD bar screen. Note that it is not an illuminance meter;
2, the unit of brightness
The brightness unit of the bar LCD screen and the LCD bar screen is: candela/square meter.
3, the principle of brightness measurement
1) The luminance meter mainly uses a pair of light holes with a certain distance to receive the luminous flux of a fixed solid angle and a fixed projection area. This value does not change with the distance of the object, as long as the surface area of the object is large enough. In order to aim at the measured object, an imaging system is often used.
2). The light source to be tested is imaged on the mirror with a hole (front light hole) after passing through the objective lens, and a part of it is received by the human eye through the mirror and eyepiece to aim and monitor the coincidence of the clear imaging surface and the mirror with the hole; Part of the light passes through the small hole on the reflector and reaches the V(λ) receiver through the rear light hole. The brightness value is displayed by pointer or digital meter.
