Light detection method with automatic exposure detection (AED) scan mode
A light detection method for a light detection device is provided. The light detection device includes multiple scan lines and multiple light sensing elements. Each of the light sensing elements is coupled to a corresponding one of the scan lines. The light detection method includes: in a detection mode, sequentially scanning a first scan line to a (N+1) th scan line among the scan lines, wherein a N th scan line is not adjacent to at least one of a (N−1) th scan line and the (N+1) th scan line; reading signals of the light sensing elements coupled to the first scan line to the (N+1) th scan line; determining whether the signals meet an exposure standard; and controlling the light detection device to enter a value reading mode when the signals meet the exposure standard.
1 . A light detection method for a light detection device, wherein the light detection device comprises a plurality of scan lines and a plurality of light sensing elements, wherein each of the light sensing elements is coupled to a corresponding one of the scan lines, the scan lines are electrically connected to a driving circuit, and the light detection method comprises:
in a detection mode, sequentially scanning a first scan line to a (N+1) th scan line among the scan lines, wherein a N th scan line is not adjacent to at least one of a (N−1) th scan line and the (N+1) th scan line;
in the detection mode, reading a plurality of signals of the light sensing elements coupled to the first scan line to the (N+1) th scan line and then resetting a charge in a light sensing element row of the light sensing elements to zero after the charge in the light sensing element row is read out;
determining whether the signals meet an exposure standard; and
controlling the light detection device to enter a value reading mode when the signals meet the exposure standard.
2 . The light detection method according to claim 1 , wherein the N th scan line is not adjacent to the (N−1) th scan line and the (N+1) th scan line.
3 . The light detection method according to claim 1 , wherein the driving circuit comprises a first output line to a (N+1) th output line arranged along an arrangement direction, and the first output line to the (N+1) th output line are respectively electrically connected to a corresponding one of the first scan line to the (N+1) th scan line, wherein the light detection method further comprises:
sequentially transmitting scan signals through the first output line to the (N+1) th output line.
4 . The light detection method according to claim 1 , wherein the driving circuit comprises a first output line to a (N+1) th output line arranged along an arrangement direction, and the first output line to the (N+1) th output line are respectively electrically connected to the first scan line to the (N+1) th scan line, wherein the light detection method further comprises:
non-sequentially transmitting scan signals through the first output line to the (N+1) th output line.
5 . The light detection method according to claim 4 , wherein the light detection device further comprises a control circuit electrically connected to the driving circuit, and the light detection method further comprises:
controlling an order that the first output line to the (N+1) th output line transmit the scan signals by the control circuit.
6 . The light detection method according to claim 4 , wherein a number of the scan lines is (N+1), a number of spaced scan lines between the first scan line and a second scan line scanned in sequence is M, and a greatest common factor of (N+1) and M is equal to 1.
7 . The light detection method according to claim 1 , wherein the exposure standard comprises a threshold, wherein determining whether the signals meet the exposure standard comprises:
determining whether a charge amount corresponding to the signals is greater than the threshold; and
when the charge amount corresponding to one of the signals is greater than the threshold, determining that the signals meet the exposure standard.
8 . The light detection method according to claim 7 , wherein determining whether the signals meet the exposure standard further comprises:
when the charge amounts corresponding to the signals are less than or equal to the threshold, determining that the signals do not meet the exposure standard.
9 . The light detection method according to claim 1 , further comprising:
after executing the value reading mode, performing a compensation step to compensate the signals of the light sensing elements coupled to the first scan line to the (N+1) th scan line read in the detection mode.
10 . A light detection method for a light detection device, wherein the light detection device comprises a plurality of scan lines and a plurality of light sensing elements, wherein each of the light sensing elements is coupled to a corresponding one of the scan lines, the scan lines are electrically connected to a driving circuit, and the light detection method comprises:
in the detection mode, sequentially scanning a first scan line and a second scan line among the scan lines, wherein the first scan line is not adjacent to the second scan line;
in the detection mode, reading a plurality of signals of the light sensing elements coupled to the first scan line and the second scan line and then resetting a charge in a light sensing element row of the light sensing elements to zero after the charge in the light sensing element row is read out;
determining whether the signals meet an exposure standard; and
controlling the light detection device to enter a value reading mode when the signals meet the exposure standard.
11 . The light detection method according to claim 10 , wherein the scan lines comprise the first scan line to a (N+1) th scan line, wherein a N th scan line is not adjacent to a (N−1) th scan line and the (N+1) th scan line.
12 . The light detection method according to claim 10 , wherein the driving circuit comprises a first output line to a (N+1) th output line arranged along an arrangement direction, and the first output line to the (N+1) th output line are respectively electrically connected to a corresponding one of the scan lines, wherein the light detection method further comprises:
sequentially transmitting scan signals through the first output line to the (N+1) th output line.
13 . The light detection method according to claim 10 , wherein the driving circuit comprises a first output line to a (N+1) th output line arranged along an arrangement direction, and the first output line to the (N+1) th output line are respectively electrically connected to a corresponding one of the scan lines, wherein the light detection method further comprises:
non-sequentially transmitting scan signals through the first output line to the (N+1) th output line.
14 . The light detection method according to claim 13 , wherein the light detection device further comprises a control circuit electrically connected to the driving circuit, and the light detection method further comprises:
controlling an order that the first output line to the (N+1) th output line transmit the scan signals by the control circuit.
15 . The light detection method according to claim 13 , wherein a number of the scan lines is (N+1), a number of spaced scan lines between the first scan line and a second scan line scanned in sequence is M, and a greatest common factor of (N+1) and M is equal to 1.
16 . The light detection method according to claim 10 , wherein the exposure standard comprises a threshold, wherein determining whether the signals meet the exposure standard comprises:
determining whether a charge amount corresponding to the signals is greater than the threshold; and
when the charge amount corresponding to one of the signals is greater than the threshold, determining that the signals meet the exposure standard.
17 . The light detection method according to claim 16 , wherein determining whether the signals meet the exposure standard further comprises:
when the charge amounts corresponding to the signals are less than or equal to the threshold, determining that the signals do not meet the exposure standard.
18 . The light detection method according to claim 10 , further comprising:
after executing the value reading mode, performing a compensation step to compensate the signals of the light sensing elements coupled to the scan lines read in the detection mode.