TW479358B - Device and method for performing resetting and reading in CMOS sensor - Google Patents

Abstract

The main object of the present invention is to provide a device for simultaneously performing resetting and reading steps in a linear CMOS sensor, which has a plurality of photocells and at least an active circuit simultaneously making a first switch device and a second switch device active, wherein the first switch device is located on a bypass of a path from the photocell to the second switch device, and the second switch device is located on a path from the photocell to a common bus. The method for simultaneously performing resetting and reading steps in a linear CMOS sensor of a scanner comprises: providing a plurality of photocells in a row, each photocell has a path connected to a common bus controlled by a corresponding first switch device, and a bypass of a path controlled by a corresponding second switch device; and simultaneously making the first switch device of the first photocell and the second switch device of the second photocell active, wherein the second photocell is located at an adjacent position below the first photocell.

Description

479358

The present invention relates to a device and method for performing zero reset and reading simultaneously in a complementary metal-oxide-semiconductor sensor, in particular to a device and method in a complementary metal-oxide-semiconductor line sensor; the complementary metal There is no storage module such as a shift register in the oxygen semiconductor linear sensor, and it is available for reading. . V] 5-2 Background of the Invention: Solid-state imaging devices (image sensors) are basically divided into two types: electrically coupled devices (charged coupled devices) and metal-oxide-semiconductor (MOS) diode arrays. Both of them need special production: to match their image sensing purpose; both also need basic externality to sense the chip to drive the array and process the output signal. Therefore, a 6-to-slave slave system needs to consider the components and their companions, the overall sensory consumption and the physical size. Machaki cost, electricity Traditionally, solid-state imaging elements have been used as scanners. But unfortunately, for the development of the portable scanning piano, the technology of the soil charge coupling element is not compatible with the quasi-DC process. The charge coupling element requires a high-volt clock signan. The charge coupling element requires a higher power consumption. Therefore, the standard Vi) is supplemented: the type of f is implicitly needed to compensate for the gold lice semiconductor process. Linear diode sensors are usually used. It is a one-dimensional array of photodiodes. The source and drain of the metal-oxide semiconductor transistor are implemented in a reverse-bias semiconductor connection. After applying a high reverse bias to the diode to be electrically isolated, it is exposed to the detected light or other radiation. Incident radiation 479358 V. Description of the invention (2) Application to the scanner can improve integration and reduce power consumption. The ray can increase the reverse bias leakage current to the diode, and this leakage current can be effectively incorporated into the isolated reverse bias capacitor, causing a decrease in the reverse bias potential. Such a well-known and utilized technology can convert radiant energy into electronic charges and electric potentials. In addition, it can also be used in linear diode type sensors. In these senses, the 'single metal oxide semiconductor transistor controls the path of the photodiode to write the pixel cell (that is, return to zero to a high reverse bias) and: * Connect the diode to a bit line (Bit — 1 ine) and connected from the bit line, private: 1 'is the purpose of the circuit to read it; this charge sensing circuit can convert the charge stored in the aa cell into an output voltage. r = This line sensor is the same as the array sensor, and it is read in continuous pixels by -scan [scan 丄 ine] as the processing form. This continuous pixel read line (word line) makes a column of pixel cells gates connected in common to the word line, which is a circuit that connects all the pixels in a column to the word line. The digital circuit is used to generate the main pattern of the register, and generally takes the mobile field (the cell will be connected to the second). When the word line is activated, the green 'on a column will be connected to the top of the sensor. The table

479358 V. Description of invention (3) On the road. Furthermore, the digital circuit can generate an actuation signal. This actuation signal controls an analog switch or sensor circuit, so that the signal can be transmitted and output on continuous bit lines. As shown in the first figure, it is not a list of active sensors based on the passive pixel cell 110. Each passive pixel cell 110 has a simple structure, including a photodiode PD and a capacitor Cd and a transistor switch MR which are matched with it. ^ Some photodiodes are connected to a column bus 120 (column bus) via switches MR1, MR2 ... MRx located in the pixel cell; the column bus 120 and a charge discharge

隹 = connected, and provides a signal potential Vo to display the level of illuminati (H. W. Complementary Metal Oxygen Seminar) collected by a photodiode pd. K: 2 cost; another-aspect Scanner. There is no movement. Scanner. According to the above-mentioned addition time, the problems caused by the poor benefit of the application on the scanner and the cost and benefit are resolved to the cm0s sensor in the scan. 5-3 The purpose and summary of the invention:

Body sensing oxygen semiconducting; in the background produced by this instrument ‘traditional complementary metal oxide’ body sensor The present invention mainly provides-performing pixel exposure and reading data at the heart

479358

Description of the Invention (4) f oxygen semiconductor sensors are not available for temporary storage as analogy. Dynamic domain and mobile domain language 1) ^ Another object of the present invention is to provide the steps of scanning and exposing data; the simultaneous execution of this concealer has different pixel zero time, but has the same exposure time. The beginning of each photoreceptor cell is based on the purpose described above for the oxygen semiconductor sensor. There are multiple photoreceptor cells in the present invention. At the same time, zeroing is performed (photoce 1 1). The second open second switching element is located on the path from the bypass) and the common bus). In a body scanning sensor, a device that is linearly complementary to the reading step including at least the functional element that passes through the line of the photoreceptor is provided. One of them simultaneously enables a first circuit. Among them, the one-to-one common complementary method of the first path has at least one row of a plurality of rows of paths. One phase is routed to the first opening of a corresponding photoreceptor cell for zeroing and reading the photoreceptor cell, and each photoreceptor cell has a connection to The corresponding first switching element 'and // the second switching element off element and the second sensing element' are also controlled. The photocell cell uses a second photocell that is located below the first photocell and has the same switch adjacent to the bypass (same busbar (the metal oxide semiconductor includes a side that provides a common sink) to make the first element active 5-4 Detailed Description of the Invention

Page 8 479358 V. Description of the Invention (5) Some embodiments of the present invention will be described in detail as follows. However, in addition to the detailed description, the present invention can also be widely implemented in other embodiments, and the scope of the present invention is not limited, which is subject to the scope of subsequent patents. The different parts of the scanner of the present invention are not drawn to size. Some $ scale has been exaggerated compared to other related scales to provide a clearer private description and understanding of the invention. In addition, although the embodiment drawn here is displayed in two dimensions with different widths and depths at different stages, it should be clearly understood that the displayed area is only part of the scanner, which may include many in three dimensions Elements arranged in. In contrast, when the actual component is manufactured, the area shown in the illustration has a three-dimensional length, width, and height. The body sensor of the present invention senses a plurality of first and first sensing photocell conductors having a phase cell. When the voltage photocell makes the sensing under the element, the photocell supplies power to each switching element while the photocell supplies power. The first sense of the first function has the purpose of a neighbor. The linear component is located on the road connected to the two-channel photocell. The near position is to provide zero and read supplements. The oxygen is connected to the connection. A device having a linear complementary metal-oxide semiconductor conducting step in total. A first pass of a photoreceptor cell of a semiconductor sensor includes at least a column, a double path, and is located at a connection. Filling oxygen for half a time, but several photoreceptor-corresponding switch elements are aligned, two photoreceptor cell positions are linearly zero with each other, and the complex path is composed of the first switch element and the second sensor-scanner. Circuit,. In the photoreceptor cell, a photoperiod photoreceptor cell has a method of connecting to at least 479358 provided in a common bus. The first switching element of the invention description (6) ~ ----, and there is a path A bypass is controlled by one phase and two switching elements; secondly, the second switching element of the first photosensitive cell and the second switching element of the second photosensitive cell are active at the same time. A nearby position below the photoreceptor cell. The embodiment of the present invention will be described with reference to additional drawings. As shown in the second figure, a schematic diagram of a pixel cell of a pixel sensor applicable to a scanner according to the present invention is shown. The photosensitive cell of each linear sensor includes a photodiode, a switch SW, a bias switch B-SW, and a pixel selection line ps. All the photoreceptors will be connected to a bus 20 in common and connected to an external control circuit (not shown). Each photodiode pD (x-1), PD (x), > ••• has its corresponding switch SW (xl), SW (x), SW (X + 1) ..., bias Press switches B-SW (x-1), B-SW (x), B-SW (x + 1) ..., and pixel selection lines PS (x-1), PS (X), PS (x + 1y ··. In the preferred embodiment, the pixel selection line PS (X) can control the switch SW (x) so that the photodiode pD (xX £ bus 20 is a path, and at the same time, the previous one is biased. The pressure switch b — swh) becomes the channel state. That is to say, during the entire exposure process, while reading the photodiode (X) data, the previous photodiode PD (X-1) is also being reset to zero. V. The third figure shows the relationship between time and voltage of the linear pixel sensor used in this preferred embodiment. The start line is the start of reading ^ a control signal of a photodiode PD (1) ; And the pixel select line (pixel Select) PS (l), pS (2) ... PS (x) are the respective reading photodiode pD (1)

Page 10 V. Description of the invention (7), PD (2) ... · PD (x) control signal. Time, 〇 黎 个 痕 # Ribe Gate is ten, t0 to tl is the signal duration t (m 'r〇c-from the time t〇 (the drop of the signal voltage)' to the end of the next signal voltage drop time ta When the photodiode PD (1) is selected like the selection line PS (1), the photodiode pD (1) starts at time to, performs zeroing, ends at time 11 and returns to zero, and at time tb Began to read the captured image data; for a photodiode?]) (1), the time of the exposure process it experienced was (t — pr0cess_2 * t (s)). m The exposure time of the same 'diode PD (2) is also (t-process-2 * t (s)). According to the time control method described above, the exposure time of each photodiode on the line sensor is the same. Furthermore, while a photodiode is performing the zeroing step, the next photodiode adjacent to it is performing the data reading step. 6 ^ The above is only a preferred embodiment of the present invention, and is not intended to be limited to the scope of the patent application of the present invention; all other equivalent changes or modifications that do not depart from the disclosure of the present invention = made under God are all Should be included in the scope of the main Shengu patent. month

Page 479358 Schematic description of the diagram 'The first diagram is a schematic structural diagram of a photodiode-based passive photoreceptor cell in a traditional active sensor; the second diagram is a pixel sensor applied to a scanner according to the present invention A schematic diagram of the structure of the photoreceptor cell; and the third diagram is a schematic diagram of a signal portion of time versus voltage during scanning according to an embodiment of the present invention. The main part of the symbol: φ 20 bus 11 0 passive pixel cell 120 row bus

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Claims (1)

479358 _Case No. 6. Scope of Patent Application 9〇10 | £ 9 | Year More if /: Seoul 1. A device (photoce 1 1) in a linear reading step and at the same time using a number of active circuits to switch the element path between the photocell and a complementary metal-oxide semiconductor sensor Simultaneous zeroing and 'the device has a plurality of photosensitive cells at least including: two switching elements and a second switching element having a function of a multi-sided first switching element located from the photosensitive cell to the second bypass. And a path of a common bus of the second switching element bit. 2 · As claimed in the patent, the circuit is the corresponding device of item 1, in which each of the above-mentioned photoreceptors. 3 · If the scope of the patent application corresponds to the first sensing second photoreceptor cell, the device in the first sensor located in the first item, its photocell, and the second opening ~ photoreceptor cell in the linear one photoreceptor The above-mentioned first switching element in the next cell corresponds to a row of adjacent positions of the complementary metal-oxide semiconductor. Each of the above mentioned functions (select line), the image 4. If the application circuit has at least a prime selection column, the patent scope includes an external control device like a prime selection column connected to a first item, which (pixel circuit. 5 types are simultaneously classified in a linear complementary metal-oxide semiconductor sensor). A device for the zero-and-snap step, the device at least comprises: a plurality of photocells (photocel 1) in a row of the linear complementary metal-oxide semiconductor sensor; Page 13 479358 VI. Patent application scope A plurality of first-switching elements, the first switching element is located on a first path connected to the photoreceptor cell, and is in phase with a voltage supply circuit μ a plurality of second switching elements, the The second switching element is located on a second path to the photoreceptor cell, and is connected to a common & 妾 to 5 亥 一 Π 口 士 你 # 穿 A pk J 日] zone row; and P only makes the first photoreceptor The first switching element of the cell and the second number of the second switching element of the second salt cell having an effect—the photosensitive cell is located below the first photosensitive cell, the second 6. The device of item 5 includes at least one pixel selection column connected to an external control circuit for each of the above-mentioned circuits. 7 · If the device in the scope of patent application No. 5 includes a plurality of photodiodes. The above photoreceptor cell is at least 8. If the device in the scope of the patent application is No. 5, the double circuit is to supply a bias voltage. The above-mentioned voltage supply power 9.- The line is divided into one and the same type. The same method of linear complementary metal oxide and reading steps in a scanner, the method '^ ν body sensor feeds a plurality of photoreceptor cells in a row at the same time' two t include: A bypass of the corresponding female photosensitive cell having a connection path is controlled by a corresponding ^ switching element and controlled by the second switching element; sometimes the first element and the first photosensitive cell Page 14 479358 --- Case No. 90101421 _ year month day _ amendment _ VI. The scope of the patent application The second switching element of the cell has an effect, and the second photosensitive cell is located in a nearby position below the first photosensitive cell. 10. The method according to item 9 of the patent application range, wherein the bypass is further connected to a bias voltage supply circuit. 11. According to the method of applying the scope of the patent for item θ, steps 、 and 由 are performed by at least a plurality of effective steps such as Xin 潠 pendulum. A plurality of corresponding corresponding control circuits 1 2 · If the method in the ninth scope of the patent application, the steps at least include: '' Among the above-mentioned effective steps, the first photoreceptor cell is reset to zero; and the second Photoreceptor cells. 1 3 · According to the method of claim 9 in the scope of patent application, the photosensitive cell in the sensor. The method further includes continuously exposing the linearity. 14. As in the method of claim 9, the a includes at least a plurality of photodiodes. ', The above-mentioned photoreceptor cells 1 5 · — a kind of linear complementary gold photoreceptor cells with different zeroing start times in the first glance of the eye The method includes at least: 479358 _Case No. 90101421_ Modification of Year of the Month_ Sixth, the scope of the patent application provides a plurality of photosensitive cells in a row, each of which has a path connected to a common bus line by a corresponding first switching element, and A bypass of the path is controlled by a corresponding second switching element; and the first switching element of the first photosensitive cell and the second switching element of the second photosensitive cell are made effective at the same time, the second The photoreceptor cell is located at a neighboring position below the first photoreceptor cell. 16. For the method according to item 15 of the patent application range, wherein the above-mentioned exposure period indicates that a period starts at the time when the photoreceptor cell ends to zero and ends at the time when the photoreceptor cell starts to be read. 17. The method according to item 15 of the patent application scope, wherein the effective steps mentioned above include at least: the first photoreceptor cell is reset to zero; and the second photoreceptor cell is read. 18. The method according to item 15 of the scope of patent application, further comprising continuously exposing the photosensitive cells in the linear sensor. 19. The method according to item 15 of the patent application range, wherein the photocells mentioned above include at least a plurality of photodiodes. Page 16