Mobile terminal and exposing method and apparatus for the same

Abstract

The invention discloses a mobile terminal which comprises a CMOS image sensor with an electronic black card on its light entrance side. The transparent electronic black card is in a transparent state during a power-off state so as to make light enter the CMOS image sensor through the electronic black card. The electronic black card is in a non-light-transmitting state during a power-on state so as to block the light into the CMOS image sensor. The invention further provides an exposing method and an apparatus for the mobile terminal. With the mobile terminal, for global exposure, all that needs to be done is make the electronic black card in a power-off state, and after that, make the electronic black card in a power-on state so as to access data on pixels after exposure. As the power-up process is very fast, the switching time is negligible, causing no uneven exposures from delays. At the same time through the power-off and power-on control over the electronic black card, limited effect is caused to the electronic black card, making it possible to have a longer service life than through the use of a mechanical shutter.

Description

technical field [0001] The present invention relates to the technical field of photographing, in particular to a mobile terminal and an exposure method and device thereof. Background technique [0002] Many existing CMOS (Complementary Metal-Oxide Semiconductor, metal oxide semiconductor elements) image sensors, in order to avoid the jelly effect when taking pictures of high-speed moving objects in the rolling shutter exposure mode (pixel point progressive exposure), often use the global shutter Exposure mode (all pixels are exposed at the same time), and most of the current CMOS image sensors are limited by the design structure. After exposure with the global shutter, it takes a period of time to read out the exposure data line by line, such as figure 1 The period from T2 to T3 is the process of reading out row-by-row data. During this period of data readout, the CMOS image sensor cannot be in the exposure state, so a mechanical shutter is required. During this period of da...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to propose a mobile terminal and its exposure method and device, aiming to solve the technical problems of uneven exposure and short service life caused by the use of mechanical shutters in the global exposure of mobile terminals in the prior art

Images