Exposure control method, exposure control circuit and mobile terminal
A mobile terminal and exposure control technology, applied in the field of communication, can solve problems such as photon interference and overflow, and achieve the effect of avoiding interference and good sensitivity
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no. 1 example
[0031] refer to figure 1 , shows a flow chart of the exposure control method according to the first embodiment of the present invention, the method is applied to a mobile terminal, and may specifically include the following steps:
[0032] Step 101, during the exposure process, respectively acquire the exposure parameters of different channels of each pixel in the CMOS sensor of the mobile terminal.
[0033] At present, CMOS sensors use a row driver to control an entire row of pixels, and each row includes a plurality of pixels. Wherein, each pixel is composed of four transistors and a photodiode, and further, the four transistors may specifically include an R channel, a Gr channel, a Gb channel and a B channel. A channel refers to a sensor component composed of different filters in each row of a CMOS sensor.
[0034] Usually, when a mobile terminal using a CMOS sensor performs a photographing operation, the rolling exposure is mainly realized through the row control signal ...
no. 2 example
[0046] refer to figure 2 , shows a flow chart of an exposure control method according to a second embodiment of the present invention, the method is applied to a mobile terminal, and may specifically include the following steps:
[0047] Step 201 , during the exposure process, respectively count potential well charges acquired by different channels of each pixel in the CMOS sensor.
[0048] At present, each pixel in a CMOS sensor may include four channels such as an R channel, a Gr channel, a Gb channel, and a B channel, and the four channels may be arranged in various orders.
[0049] Usually, when a mobile terminal using a CMOS sensor performs a photographing operation, the rolling exposure is mainly realized through the row control signal during the exposure process, that is, multiple pixels in each row are sequentially exposed, and when the pixel exposure of the row is completed, Then perform the same exposure operation on multiple pixels in the next row until all pixels...
no. 3 example
[0063] refer to Figure 5 , shows a block diagram of an exposure control circuit according to a third embodiment of the present invention, the exposure control circuit is applied to a mobile terminal, the exposure control circuit can realize the details of the exposure control method in Embodiment 1 to Embodiment 2, and achieve The same effect can specifically include the following parts:
[0064] CMOS sensor 501, the CMOS sensor 501 includes at least one pixel 502, each pixel 502 includes at least one channel 503;
[0065] A row driver 504 respectively connected to each channel 503 of each pixel 502 for performing exposure control on each channel 503 of each pixel 502;
[0066] The saturation judging circuit 505 respectively connected to each channel 503 of each pixel 502 is used for judging whether the potential well charge of each channel 503 reaches saturation.
[0067] It should be noted that, in Figure 5 In the figure, only the row driver 504 and the saturation judgm...
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