TWI412974B - Sensing panel - Google Patents

Abstract

The present invention is related to a sensing panel. The sensing panel comprises a plurality of display cells, a plurality of scan lines, a plurality of photo-sensing digital function circuits, a plurality of mental lines, and a position calculation circuit. The photo-sensing digital function circuits are disposed in part of the display cells. An input end of each photo-sensing digital function circuit is coupled to the scan line of the display cell which the photo-sensing digital function circuit is disposed in. Each mental line is coupled to out ends of the photo-sensing digital function circuits on the same column. The position calculation circuit has a plurality of input ends coupled to the mental lines, for determining a corresponding position based on signals on the mental lines. The sensing panel is manufactured by using the in-cell processing method, and only single side sensing IC is needed to measure the digital signal.

Description

Sensing panel

The present invention relates to a sensing panel, and more particularly to a sensing panel using a Photo-Sensing Digital Function Circuit.

In recent years, various electronic products have been moving toward simple operation, small size, and large screen size. In particular, portable electronic products have stricter requirements on volume and screen size. Therefore, many electronic products integrate the sensing panel with the liquid crystal display panel to omit the space required for the keyboard or the manipulation of the buttons, thereby expanding the configurable area of the screen.

At present, the traditional sensing panels can be roughly divided into resistive, capacitive, infrared, ultrasonic and light sensing panels, among which resistive sensing panels and capacitive sensing panels are the most common. The product. When the user touches the corresponding position of the resistive or capacitive sensing panel by the stylus or the finger, the inductance or capacitance in the panel changes. Through the change of the inductance or capacitance in the panel, the sensing panel can smoothly sense the corresponding position touched. In addition, when the user touches or uses the laser pointer to illuminate the corresponding position of the light sensing panel, the light sensing circuit constructed by the panel may change its photocurrent due to the change of luminosity. By changing the photocurrent in the panel, the light sensing panel can smoothly sense the corresponding position touched or illuminated by the laser pointer.

When the conventional sensing panel senses the corresponding position touched or illuminated, the bilateral direction measurement method must be used to sense the corresponding position. In other words, it is necessary to measure the X direction and the Y direction in order to sense the corresponding position. In addition, the traditional resistive or capacitive sensing panels are mostly implemented with the design of an external touch panel. For the above reasons, the conventional sensing panel is relatively expensive to manufacture and is relatively susceptible to noise.

An exemplary embodiment of the present invention provides a sensing panel that is sensed by using an Active Sensing Pixel constructed in its panel to sense being touched or illuminated by a laser pointer. Corresponding location. In addition, the above-described sensing panel can be fabricated by an in-cell (In-Cell) process.

The sensing panel described above only needs one-side measurement to sense the corresponding position on the panel that is touched or illuminated by the laser pen, and the active sensing pixel can be located in the thin film transistor layer (Thin -Film-Transistor Layer, referred to as TFT Layer). Therefore, the above-mentioned sensing panel can be applied to an Active Matrix Liquid Crystal Display (AMLCD) or an Active Matrix Organic Light Emitting Diode (AMOLED).

An exemplary embodiment of the present invention provides a sensing panel including a plurality of display cells, a plurality of scanning lines, a plurality of optical sensing digital function circuits, a plurality of metal lines, and a position calculating circuit. The plurality of optical sensing digital function circuits are disposed in a portion of the display cells, and the input end of each of the optical sensing digital function circuits is coupled to the scan line to which the display cells of the configuration are connected. Each metal line is coupled to the output of the light sensing digital function circuit in the display cell of the same row. The position calculation circuit has a plurality of input ends coupled to the plurality of metal lines, and the position calculation circuit determines the corresponding position according to the signals on the plurality of metal lines.

In summary, the sensing panel provided by the exemplary embodiment of the present invention can be applied to various different forms of displays, and can be manufactured by itself using an in-line process. In addition, the aforementioned sensing panel only needs to perform unilateral measurement, and the corresponding position on the sensing panel that is touched or illuminated can be smoothly known. Therefore, the signal-to-noise ratio and area use efficiency of the aforementioned sensing panel are higher than that of the conventional resistive or capacitive sensing panel, and the parasitic resistance and capacitance effect and manufacturing cost are lower than those of the conventional sensing panel.

The above described features and advantages of the present invention will be more apparent from the following description.

First, please refer to FIG. 1. FIG. 1 is a circuit diagram of a sensing panel 10 according to an exemplary embodiment of the present invention. The sensing panel 10 is illustrated with an example of a 2x2 pixel, however, the size of the sensing panel 10 is not intended to limit the invention.

The sensing panel 10 includes four active sensing pixels 111, 112, 121, 122, scan lines Scan_L1, Scan_L2, data lines Data_L1, Data_L2, metal lines Detect_C1, Detect_C2, and position calculation circuits. 15. The position calculation circuit 15 is coupled to the metal lines Detect_C1 and Detect_C2. The scan line Scan_L1 is coupled to the two active sense pixels 111, 121 of the first column, and the scan line Scan_L2 is coupled to the two active sense pixels 112, 122 of the second column. The data line Data_L1 and the metal line Detect_C1 are both coupled to the two active sensing pixels 111, 112 in the first row, and the data line Data_L2 and the metal line Detect_C2 are coupled to the two active sensing patterns in the second row. Prime 121, 121.

It is worth mentioning that the position calculation circuit 15 only needs to be disposed at one end of the sensing panel 10, in other words, the sensing panel 10 only needs single-ended measurement, and can sense the situation that the sensing panel is touched or illuminated. . In another embodiment, the sensing panel 10 further has a measuring wafer (not shown in FIG. 1), and the position calculating circuit 15 is further disposed on the measuring wafer.

The structures of the active sensing pixels 111, 112, 121, and 122 are identical to each other. The active sensing pixel 111 is taken as an example to illustrate the structure, and the remaining active sensing pixels 112, 121, and 122 are So on and so forth. The active sensing pixel 111 includes a display cell Cell_11 and a light sensing digital function circuit PS_11. The optical sensing digital function circuit PS_11 is coupled to the metal line Detect_C1 and the scan line Scan_L1, and the display cell cell_11 is coupled to the scan line Scan_L1 and the data line Data_L1.

The display cell Cell_11 may be any conventional organic light-emitting diode display cell or liquid crystal display cell. Here, the simplest structure is taken as an example, the display cell Cell_11 includes a capacitor C1, an organic light-emitting diode OLED1 and two Thin film transistors TFT_M1, TFT_M2. The gate of the thin film transistor TFT_M1 is coupled to the scan line Scan_L1, the drain of the thin film transistor TFT_M1 is coupled to the data line Data_L1, and the source of the thin film transistor TFT_M1 is coupled to one end of the capacitor C1 and the thin film transistor. The gate of TFT_M2. The drain of the thin film transistor TFT_M2 is used to receive the supply voltage VDD and is coupled to the other end of the capacitor C1. The source of the thin film transistor TFT_M2 is coupled to the anode end of the light emitting diode OLED1, and the cathode end of the light emitting diode OLED1 is coupled to the ground terminal GND.

The configurations of the display cells Cell_21, Cel1_12, and Cell_22 included in the other active sensing pixels 121, 112, and 122 and their components can also be deduced by analogy, and thus will not be described here. In addition, by scanning signals on the scan lines Scan_L1 and Scan_L2, the display cells Cell_11, Cell_12, Cell_21, and Cell_22 receive the data lines Data_L1 and Data_L2, and display the corresponding pixels according to the signals on the data lines Data_L1 and Data_L2.

The photo sensing digital function circuits PS_11 and PS_21 receive the scan signal on the scan line Scan_L1, and determine the output signal based on the received optical signal and the scan signal on the scan line Scan_L1. The photo sensing digital function circuits PS_12 and PS_22 receive the scanning signal on the scanning line Scan_L2, and determine the output signal based on the received optical signal and the scanning signal of the scanning line Scan_L2.

The metal line Detect_C1 sends the output signals of the optical sensing digital function circuits PS_11 and PS_12 to the position calculating circuit 15, and the signal on the metal line Detect_C1 is substantially equal to the result of superimposing the output signals of the optical sensing digital function circuits PS_11 and PS_12. The metal line Detect_C2 sends the output signals of the optical sensing digital function circuits PS_21 and PS_22 to the position calculating circuit 15, and the signal on the metal line Detect_C2 is substantially equal to the result of superimposing the output signals of the optical sensing digital function circuits PS_21 and PS_22. Then, the position calculating circuit 15 can calculate the corresponding position on the sensing panel 10 that is touched or illuminated by the laser pen according to the signals on the metal lines Detect_C1 and Detect_C2.

Next, the relationship between the input signal X(t) of the photo-sensing digital function circuits PS_11, PS_12, PS_21, and PS_22 and the output signal Y(t) will be described in detail. The relationship between the input signal X(t) of the optical sensing digital function circuits PS_11, PS_12, PS_21 and PS_22 and the output signal Y(t) can be expressed as the following formula:

. Where c is the gain factor. In other words, if the intensity of the optical signal is large enough (greater than or equal to the preset threshold), the output signal Y(t) will be proportional to the input signal X(t); conversely, if the intensity of the optical signal is insufficient (less than the preset threshold) When the value is), the output signal Y(t) will be equal to zero. Of course, the above output signal Y(t) is assuming that the input signal X(t) has no delay, and if there is a delay time t _dealy between the output signal Y(t) and the input signal X(t), then The output signal Y(t) is proportional to the delayed input signal X(tt _dealy ).

Here, the photo-sensing digital function circuit PS_11 is taken as an example, and please refer to FIG. 2. FIG. 2 is a relationship diagram between the input signal X(t) and the output signal Y(t) of the photo-sensing digital function circuit PS_11. . It is assumed that the light thresholds of X(t) and Y(t) are set between no ambient light and ambient light. When the user touches the active sensing pixel 121 of the sensing panel 10 with a finger or a touch pen. When the corresponding position is above, the intensity of the optical signal received by the optical sensing digital circuit PS_11 becomes weak (becomes no ambient light), so the output signal Y(t) is zero. When the corresponding position on the active sensing pixel 121 of the sensing panel 10 is not touched, the intensity of the optical signal received by the optical sensing digital circuit PS_11 is sufficiently large, so that the output signal Y(t) is equal to cX ( t).

Here, it is worth mentioning that the relationship diagram of FIG. 2 is drawn for the above formula, however, the above formula is not intended to limit the present invention, for example, the following two formulas can also be used in the present invention:

Where c ₁ and c ₄ are gain coefficients, and c ₁ and c ₄ are values of a certain DC level.

At present, the sensing panel is not only operated by touch, but also by means of laser pen illumination. Therefore, it is only necessary to modify the optical gates of the optical sensing digital function circuits PS_11, PS_12, PS_21, and PS_22 to achieve the same result as the above description between the ambient light intensity and the laser light intensity. That is, when the user uses a laser pen to illuminate the corresponding position on the active sensing pixel 121 of the sensing panel 10, the intensity of the optical signal received by the optical sensing digital circuit PS_11 becomes stronger, so the output thereof The signal Y(t) is cX(t). When the corresponding position on the active sensing pixel 121 of the sensing panel 10 is not illuminated by the laser pen, the intensity of the optical signal received by the optical sensing digital circuit PS_11 is insufficient, so the output signal Y(t) Equal to 0. It is to be noted that the above formulas are not intended to limit the invention, and any changes in the sensing panel according to the concept and spirit of the present invention are also within the scope of the present invention.

Next, how the position calculation circuit 15 determines the corresponding position at which the sensing panel is touched will be described in several examples. It is assumed that the relationship between the input signal X(t) of the optical sensing digital function circuits PS_11, PS_12, PS_21 and PS_22 and the output signal Y(t) is as shown in FIG. 2, and the gain coefficient c is 1. Please refer to FIG. 3A and FIG. 3B . FIG. 3A is a signal waveform diagram in the sensing panel 10 , and FIG. 3B is another signal waveform diagram in the sensing panel 10 . In the above assumption, FIG. 3A may further be a signal waveform diagram when only the corresponding position of the active sensing pixel 122 is touched in the sensing panel 10, and FIG. 3B may be only the sensing panel 10 A signal waveform diagram when the corresponding position of the active sensing pixel 112 is touched.

Referring to FIG. 3A, when the corresponding position of the active sensing pixel 122 of the sensing panel 10 is touched, the optical sensing digital function circuit PS_22 may output an output signal because the received optical signal strength is insufficient. 0. As the active sensing pixels 111, 112 and 121 of the sensing panel 10 are not touched, the optical signals received by the optical sensing digital function circuits PS_11, PS_12 and PS_21 are strong enough. The output signals of the photo-sensing digital function circuits PS_11 and PS_21 are scan signals on the scan line Scan_L1, and the output signals of the photo-sensing digital function circuit PS_12 are scan signals on the scan line Scan_L2.

Therefore, the signal on the metal line Detect_C1 is the superposition result of the output signals of the optical sensing digital function circuits PS_11 and PS_12 (the result of superposition of the scanning signals on the scan lines Scan_L1 and Scan_L2), and the signal on the metal line Detect_C2 is equal to the light sense. The result of superposition of the output signals of the digital function circuits PS_21 and PS_22 (equivalent to the scan signal on the scan line Scan_L1). In the case where the sensing panel 10 is not touched, the signals on the metal lines Detect_C1 and Detect_C2 received by the position calculating circuit 15 should be the superimposed results of the scanning signals on the scanning lines Scan_L1 and Scan_L1. Therefore, the position calculation circuit 15 can calculate the corresponding position based on the signals on the current metal lines Detect_C1 and Detect_C2.

In the example of FIG. 3A, the signal on the metal line Detect_C1 is equivalent to the superposition result of the scan signals on the scan lines Scan_L1 and Scan_L2, so the position calculation circuit 15 knows the sense of the active sense pixels 111 and 112 in the first line. The corresponding position on the test panel 10 is not touched. The signal on the metal line Detect_C2 is equivalent to the scan signal of the scan line Scan_L1, so the position calculation circuit 15 knows that the corresponding position of the active sense pixel 121 of the second line on the sensing panel 10 is not touched. The active sensing pixel 122 of the second row is touched at the corresponding position on the sensing panel 10. Therefore, the position calculation circuit 15 can calculate the corresponding position at which the sensing panel 10 is touched based on the signals of the metal lines Detect_C1 and Detect_C2.

Referring to FIG. 3B, when the corresponding position of the active sensing pixel 112 of the sensing panel 10 is touched, the optical sensing digital function circuit PS_12 may output an output signal because the received optical signal strength is insufficient. 0. As the active sensing pixels 111, 121 and 122 of the sensing panel 10 are not touched, the optical signal received by the optical sensing digital function circuits PS_11, PS_21 and PS_22 is strong enough. The output signals of the photo-sensing digital function circuits PS_11 and PS_21 are scan signals on the scan line Scan_L1, and the output signals of the photo-sensing digital function circuit PS_22 are scan signals on the scan line Scan_L2.

Therefore, the signal on the metal line Detect_C1 is the superposition result of the output signals of the optical sensing digital function circuits PS_11 and PS_12 (equivalent to the scanning signal on the scanning line Scan_L1), and the signal on the metal line Detect_C2 is equal to the optical sensing digital function circuit PS_21 The result of superposition with the output signal of PS_22 (equivalent to the superposition result of the scan signals on scan lines Scan_L1 and Scan_L2).

In the example of FIG. 3B, the signal on the metal line Detect_C1 is equivalent to the scan signal of the scan line Scan_L1, so the position calculation circuit 15 knows the corresponding position of the active sense pixel 111 of the first line on the sensing panel 10. It is not touched, and the active sensing pixel 112 of the first row is touched at the corresponding position on the sensing panel 10. In addition, the signal on the metal line Detect_C2 is equivalent to the superposition result of the scan signals on the scan lines Scan_L1 and Scan_L2, so the position calculation circuit 15 knows that the active sense pixels 121 and 122 of the second line are on the sensing panel 10. The corresponding position has not been touched. Therefore, the position calculation circuit 15 can calculate the corresponding position at which the sensing panel 10 is touched based on the signals of the metal lines Detect_C1 and Detect_C2.

It is worth mentioning that when the sensing panel is irradiated with a laser pointer, the input signal X(t) and the output signal Y(t) of the optical sensing digital function circuits PS_11, PS_12, PS_21 and PS_22 are assumed. The relationship between the two is as shown in FIG. 2, and the gain coefficient c is 1. FIG. 3A shows a signal waveform diagram when only the corresponding position of the active sensing pixel 122 in the sensing panel 10 is not illuminated by the laser pointer. FIG. 3B shows a signal waveform diagram when only the corresponding position of the active sensing pixel 112 in the sensing panel 10 is not illuminated by the laser pointer.

In addition, it is assumed that the relationship between the input signal X(t) of the photo-sensing digital function circuits PS_11, PS_12, PS_21, and PS_22 and the output signal Y(t) is as shown in FIG. 2, and the gain coefficient c is 1. Please refer to FIG. 4A and FIG. 4B . FIG. 4A and FIG. 4B are diagrams of another signal waveform in the sensing panel 10 . In the above assumption, FIG. 4A is further used to indicate a signal waveform diagram when only the corresponding position of the active sensing pixel 122 in the sensing panel 10 is not touched, and FIG. 4B is used to sense the panel. In the sensing panel 10, only the signal waveform of the active sensing pixel 112 is not touched.

Referring to FIG. 4A, when only the corresponding position of the active sensing pixel 122 in the sensing panel 10 is not touched, only the optical sensing digital function circuit PS_22 receives an optical signal with sufficient intensity, so that Its output signal is the scan signal on the scan line Scan_L2. As the active sensing pixels 111, 112, and 121 of the sensing panel 10 are touched, the optical signals received by the optical sensing digital function circuits PS_11, PS_12, and PS_21 are insufficient in intensity, and the output signals thereof are all 0.

The signal on the metal line Detect_C1 is the superposition result of the output signals of the optical sensing digital function circuits PS_11 and PS_12. Since the output signals of the optical sensing digital function circuits PS_11 and PS_12 are both 0, the signal on the metal line Detect_C1 is 0. In addition, the signal on the metal line Detect_C2 is equal to the superposition result of the output signals of the photo-sensing digital function circuits PS_21 and PS_22 (equivalent to the scanning signal on the scanning line Scan_L2). In the case where the sensing panel 10 is completely touched, the signals on the metal lines Detect_C1 and Detect_C2 received by the position calculating circuit 15 should be zero. Therefore, the position calculation circuit 15 can calculate the state in which the panel is touched according to the signals on the current metal lines Detect_C1 and Detect_C2.

In the example of FIG. 4A, the signal on the metal line Detect_C1 is equal to 0. Therefore, the position calculating circuit 15 knows that the corresponding positions of the active sensing pixels 111 and 112 of the first row on the sensing panel 10 are touched. To. The signal on the metal line Detect_C2 is equivalent to the scan signal of the scan line Scan_L2, so the position calculation circuit 15 knows that the corresponding position of the active sense pixel 121 of the second line is touched on the sensing panel 10, and the The two rows of active sensing pixels 122 are not touched at corresponding locations on the sensing panel 10. Therefore, the position calculation circuit 15 can calculate the corresponding position at which the sensing panel 10 is touched based on the signals of the metal lines Detect_C1 and Detect_C2.

Referring to FIG. 4B, when only the corresponding position of the active sensing pixel 112 in the sensing panel 10 is not touched, the light sensing digital function circuit PS_12 may be caused by the received sufficient light signal. Its output signal is the scan signal on the scan line Scan_L2. As the active sensing pixels 111, 121 and 122 of the sensing panel 10 are touched, the optical signals received by the optical sensing digital function circuits PS_11, PS_21 and PS_22 are insufficient in intensity, and the output signals thereof are all 0.

Therefore, the signal on the metal line Detect_C1 is the superposition result of the output signals of the optical sensing digital function circuits PS_11 and PS_12 (equivalent to the scanning signal on the scanning line Scan_L2), and the signal on the metal line Detect_C2 is equal to the optical sensing digital function circuit PS_21 As a result of superposition with the output signal of PS_22, since the output signals of the optical sensing digital function circuits PS_21 and PS_22 are both 0, the signal on the metal line Detect_C2 is zero.

In the example of FIG. 4B, the signal on the metal line Detect_C1 is equivalent to the scan signal of the scan line Scan_L2, so the position calculation circuit 15 knows the corresponding position of the active sense pixel 111 of the first line on the sensing panel 10. It is touched, and the active sensing pixel 112 of the first row is not touched at the corresponding position on the sensing panel 10. In addition, the signal on the metal line Detect_C2 is equal to 0. Therefore, the position calculating circuit 15 knows that the corresponding positions of the active sensing pixels 121 and 122 of the second line on the sensing panel 10 are touched. Therefore, the position calculation circuit 15 can calculate the corresponding position at which the sensing panel 10 is touched based on the signals of the metal lines Detect_C1 and Detect_C2.

It is worth mentioning that when the sensing panel is irradiated with a laser pointer, the input signal X(t) and the output signal Y(t) of the optical sensing digital function circuits PS_11, PS_12, PS_21 and PS_22 are assumed. The relationship between the two is as shown in FIG. 2, and the gain coefficient c is 1, and FIG. 4A shows a signal waveform diagram when only the corresponding position of the active sensing pixel 122 in the sensing panel 10 is illuminated by the laser pointer. 4B shows a signal waveform diagram when only the corresponding position of the active sensing pixel 112 in the sensing panel 10 is illuminated by the laser pointer.

In summary, it can be seen that the sensing panel 10 provided by the exemplary embodiment of the present invention only needs to sense a single side (for the X axis) when calculating the corresponding position, unlike the conventional sensing panel needs to be simultaneously Bilateral sensing of the X and Y axes is performed to calculate the corresponding position. Therefore, the complexity of the sensing panel 10 will be smaller than that of a conventional sensing panel.

In addition, the sensing panel 10 provided by the exemplary embodiment of the present invention can be manufactured by using an in-line process, so that the manufacturing cost, noise interference, and parasitic RC effect can be reduced, and Since the measurement signal is a digital signal, its signal-to-noise ratio can also be improved. In addition, it is worth mentioning that, from the above example, it can be known how the position calculation circuit 15 determines the corresponding position touched or illuminated and the light sensing digital function circuits PS_11, PS_12, PS_21 and PS_22. The relationship between the input signal used and the output signal is related.

When the sensing panel 10 is fabricated by an in-line process, the sensing panel 10 does not require an externally applied touch mode, and the active sensing pixels 111, 112, 121, and 122 may be located on the thin film transistor layer ( Thin-Film-Transistor Layer, referred to as TFT Layer). Therefore, the sensing panel 10 can be applied to an Active Matrix Liquid Crystal Display (AMLCD) or an Active Matrix Organic Light Emitting Diode (AMOLED).

In general, the position touched by the finger and the touch pen may contain multiple pixels at the same time, as is the position illuminated by the laser pen. Therefore, it is not necessary to design each pixel on the sensing panel as an active sensing pixel, and some pixels can be the same as the general pixels of the conventional display panel. As a result, the manufacturing cost can be reduced and the wafer area usage rate can be increased.

Next, please refer to FIG. 5A, which is a schematic diagram of another sensing panel 50 provided by an exemplary embodiment of the present invention. The sensing panel 50 includes a plurality of general pixels 501 (squares without black circles), a plurality of active sensing pixels 502 (squares with black circles) and position calculation circuits (not shown in FIG. 5A). . The configuration of the active sensing pixel 502 is as described above, and the function of the position calculating circuit is also as described above, and will not be described here. In addition, the general pixel 501 includes only the display cells, and does not have the function of sensing itself. The size of the area of the touch panel 50 touched by the touch pen or the finger may be the same as the size of the circle 503 or 504. Therefore, in general, the sensing panel 50 does not need to configure the light sensing function circuit on each pixel. Within, it is possible to have several pixels together use at least one active sensing pixel 502 with sensing function.

It should be noted here that a plurality of active sensing pixels 502 having sensing functions are regularly dispersed in the sensing panel 50. This specification may be, for example, in each row, the active sense pixels 502 may be spaced apart by a plurality of general pixels 501 that do not have a sensing function. In the exemplary embodiment of FIG. 5A, in each row, two active pixels 501 having no sensing function are spaced between the active sensing pixels 502. However, the above rules are not intended to limit the present invention. For different needs and needs, the user can design the rules of active sensing pixel placement.

5B and 5C, FIG. 5B is a schematic diagram of another sensing panel 51 provided by an exemplary embodiment of the present invention, and FIG. 5C is a schematic diagram of another sensing panel 52 provided by an exemplary embodiment of the present invention. The active sensing pixel 512 in FIG. 5B is placed in a different manner from FIG. 5A. In each row of FIG. 5B, three active pixels without sensing function are spaced between the active sensing pixels 512. 511. The active sensing pixel 522 of FIG. 5C is placed in a different manner from that of FIG. 5B , and the active sensing pixels 522 are only located on both sides of the sensing panel 52 . This design is suitable for the sensing panel 52 only. The situation where the two sides are touched or illuminated, for example, the sensing panel on the display device of the cash dispenser. In each of the two sides of FIG. 5C, three active pixels 521 having no sensing function are spaced between the active sensing pixels 522.

Please refer to FIG. 6A. FIG. 6A is a schematic diagram of another sensing panel 60 according to an exemplary embodiment of the present invention. The sensing panel 60 includes a plurality of active sensing pixels 611, 615, 623, 631, 635, 643, 651, 655, a plurality of general pixels 601 and sensing calculation circuits without sensing functions (not shown) Figure 6A). The active sensing pixels 611, 615, 623, 631, 635, 643, 651, 655 are arranged as shown in FIG. 6A, and the structure is as described above, and the functions of the position calculating circuit are also introduced above. Therefore, they are not described here.

The light sensing digital function circuits in the active sensing pixels 611 and 615 send their output signals to the metal line Detect_C1 (not shown in FIG. 6A), and the light sensing in the active sensing pixels 623 and 643 The digital function circuit will send its output signals to the metal lines Detect_C2 and Detect_C4 respectively (not shown in Figure 6A). The optical sensing digital function circuits in the active sensing pixels 631 and 635 will send their output signals to the metal. Line Detect_C3 (not shown in Figure 6A), and the light sensing digital function circuits in active sensing pixels 651 and 653 send their output signals to metal line Detect_C5 (not shown in Figure 6A).

Please refer to FIG. 6A and FIG. 6B simultaneously. FIG. 6B is a waveform diagram of scan signals on the scan lines Scan_L1 to Scan_L5 of the sensing panel 60. In the exemplary embodiment of FIG. 6A, the light sensing digital function circuits in the active sensing pixels 611, 631, and 651 receive the scan signals of the scan lines Scan_L1 of the first column, and the active sensing pixels 623 and 643. The optical sensing digital function circuit receives the scan signal of the scan line Scan_L3 of the third column, and the light sensing digital function circuit of the active sensing pixels 615, 635 and 655 receives the scan line Scan_L5 of the fifth column. Scanning signal.

Next, please refer to FIGS. 6A-6C. FIG. 6C is a signal waveform diagram in the sensing panel 60. In this exemplary embodiment, the size of the area that the finger or touch pen can touch or the laser pen can illuminate is like the size of the circle 69. In addition, in this exemplary embodiment, it is assumed that the corresponding position of the active pixel 643 on the sensing panel 60 is illuminated by the laser pen, while the active sensing pixels 611, 615, 623, 631, 635, 643, The relationship between the output signal and the input signal of the photo-sensing digital function circuit in 651 and 655 adopts the relationship as shown in FIG. 2, and the gain coefficient c is 1.

Therefore, in this exemplary embodiment, only the output signal of the optical sensing digital function circuit in the active sensing pixel 643 is the scanning signal of the scanning line Scan_L3, and the remaining active sensing pixels 611, 615, 623, The output signals of the optical sensing digital function circuits in 631, 635, 651 and 655 are all 0. Therefore, the signals on the metal lines Detect_C1 to Dectet_C3 and Dectet_C5 are all 0, and the signal on the metal line Detect_C4 is equivalent to the scan signal on the scan line Scan_L3. Next, the position calculation circuit receives the signals on the metal lines Detect_C1 to Dectet_C5, and according to the signals on the metal lines Detect_C1 to Dectet_C5, it can be known that the corresponding position of the active picture element 643 on the sensing panel 60 is illuminated by the laser pen.

Next, please refer to FIGS. 6A, 6B and 6D, which is another signal waveform diagram in the sensing panel 60. In this exemplary embodiment, it is assumed that the corresponding position of the active pixel 643 on the sensing panel 60 is touched by a finger or a stylus, while the active sensing pixels 611, 615, 623, 631, 635, 643 The relationship between the output signal and the input signal of the optical sensing digital function circuit in 651 and 655 adopts the relationship as shown in FIG. 2, and the gain coefficient c is 1.

Therefore, in this exemplary embodiment, only the output signal of the photo-sensing digital function circuit in the active sensing pixel 643 is zero. The output signals of the optical sensing digital function circuits in the active sensing pixels 611, 631 and 651 are the scanning signals on the scanning line Scan_L1, and the output signals of the optical sensing digital function circuits in the active sensing pixels 623 The scan signals on the scan line Scan_L3 are all, and the output signals of the photo-sensing digital function circuits in the active sense pixels 615, 635 and 655 are the scan signals on the scan line Scan_L5.

Therefore, the signals on the metal lines Detect_C1, Dectet_C3 and Dectet_C5 are the superposition results of the scan signals on the scan lines Scan_L1 and Scan_L2, the signal on the metal line Detect_C2 is equivalent to the scan signal on the scan line Scan_L3, and the signal on the metal line Detect_C4 is Is 0. Next, the position calculation circuit receives the signals on the metal lines Detect_C1 to Dectet_C5, and according to the signals on the metal lines Detect_C1 to Dectet_C5, it can be known that the corresponding position of the active picture element 643 on the sensing panel 60 is touched.

Next, please refer to FIG. 7. FIG. 7 is a circuit diagram of the optical sensing digital function circuit 70 provided by an exemplary embodiment of the present invention. The relationship between the output signal Y(t) of the optical sensing digital function circuit 70 and the input signal X(t) is as shown in FIG. 2. The light sensing digital function circuit 70 includes an inverter 71, a light sensing inverter 72, and a diode circuit 73. The photo-sensing inverter 72 is coupled to the inverter 71 and the diode circuit 73.

The inverter 71 includes two transistors NM1 and NM2 coupled to each other, and the detailed coupling relationship is as shown in FIG. The photo-sensing inverter 72 includes photo-sensing transistors NM3, NM4 and transistors NM5 and NM6, and the detailed coupling relationship is as shown in FIG. The diode circuit 73 includes a transistor NM7 coupled to a dummy diode.

When the optical signal strength is large enough, the photo-sensing transistors NM3, NM4 will be turned on. At this time, the function of the photo-sensing inverter 72 is the same as that of the general inverter. When the optical signal strength is insufficient, the photo-sensing transistors NM3 and NM4 are turned off. At this time, the photo-sensing inverter 72 outputs a low-voltage level signal to the diode circuit 73. Therefore, when the optical signal strength is sufficiently large, the output signal of the photo-sensing inverter 72 is equal to c times the input signal X(t); when the optical signal strength is insufficient, the output signal of the photo-sensing inverter 72 Equal to 0. The diode circuit 73 receives the output signal of the photo-sensing inverter 72. If the output signal of the photo-sensing inverter 72 is equal to 0, the output signal Y(t) of the diode circuit 73 is high impedance. If the output signal of the photo-sensing inverter 72 is equal to c times the input signal X(t), the output signal Y(t) of the diode circuit 73 is c times the input signal X(t). In addition, the implementation of the above-described optical sensing digital function circuit 70 is not intended to limit the present invention, and there are other differences depending on the relationship between the input signal X(t) and the output signal (t) of the photo-sensing digital function circuit 70. Implementation.

In summary, the sensing panel provided by the exemplary embodiment of the present invention can be applied to various different forms of displays, and can be manufactured by itself using an in-line process. In addition, the aforementioned sensing panel only needs to perform unilateral measurement, and the corresponding position on the sensing panel that is touched or illuminated can be smoothly known. Therefore, the signal-to-noise ratio and area use efficiency of the aforementioned sensing panel are higher than that of the conventional resistive or capacitive sensing panel, and the parasitic resistance and capacitance effect and manufacturing cost are lower than those of the conventional sensing panel.

Although the present invention has been described above by way of example embodiments, it is not intended to limit the invention, and it is to be understood by those of ordinary skill in the art that the invention may be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

10, 50, 51, 52, 60. . . Sensing panel

111, 112, 121, 122, 502, 512, 522, 611, 615, 623, 631, 635, 643, 651, 655. . . Active sensing pixel

15. . . Position calculation circuit

501, 511, 521, 601. . . General pixel

503, 504, 69. . . Touch area or illuminated area

71. . . Inverter

72. . . Light sensing inverter

73. . . Diode circuit

Scan_L1 to Scan_L5. . . Scan Line

Data_L1, Data_L2. . . Data Line

Detect_C1 ~ Detect_C5. . . metal wires

Cell_11, Cell_12, Cell_21, Cell_22. . . Display cell

PS_11, PS_12, PS_21, PS_22, 70. . . Light sensing digital function circuit

C1. . . capacitance

OLED1. . . Organic light-emitting diode

TFT_M1, TFT_M2. . . Thin film transistor

VDD. . . Supply voltage

GND. . . Ground terminal

NM1, NM2, NM5, NM6, NM7. . . Transistor

NM3, NM4. . . Light sensing transistor

1 is a circuit diagram of a sensing panel 10 provided by an exemplary embodiment of the present invention.

2 is a diagram showing a relationship between the input signal X(t) of the photo-sensing digital function circuit PS_11 and the output signal Y(t).

FIG. 3A is a signal waveform diagram within the sensing panel 10, and FIG. 3B is another signal waveform diagram within the sensing panel 10.

FIG. 4A is another signal waveform diagram within the sensing panel 10.

FIG. 4B is another signal waveform diagram within the sensing panel 10.

FIG. 5A is a schematic illustration of another sensing panel 50 provided by an exemplary embodiment of the present invention.

FIG. 5B is a schematic diagram of another sensing panel 51 provided by an exemplary embodiment of the present invention.

FIG. 5C is a schematic illustration of another sensing panel 52 provided by an exemplary embodiment of the present invention.

FIG. 6A is a schematic illustration of another sensing panel 60 provided by an exemplary embodiment of the present invention.

FIG. 6B is a waveform diagram of scan signals on the scan lines Scan_L1 to Scan_L5 of the sensing panel 60.

FIG. 6C is a signal waveform diagram within the sensing panel 60.

FIG. 6D is another signal waveform diagram within the sensing panel 60.

FIG. 7 is a circuit diagram of a light sensing digital function circuit 70 provided by an exemplary embodiment of the present invention.

10. . . Sensing panel

111, 112, 121, 122. . . Active sensing pixel

Scan_L1, Scan_L2. . . Scan Line

Data_L1, Data_L2. . . Data Line

Detect_C1, Detect_C2. . . metal wires

15. . . Position calculation circuit

Cell_11, Cell_12, Cell_21, Cell_22. . . Display cell

PS_11, PS_12, PS_21, PS_22. . . Light sensing digital function circuit

C1. . . capacitance

OLED1. . . Organic light-emitting diode

TFT_M1, TFT_M2. . . Thin film transistor

VDD. . . Supply voltage

GND. . . Ground terminal

Claims (9)

A sensing panel includes: a plurality of display cells; a plurality of scan lines; and a plurality of data lines, wherein each of the data lines is coupled to the display cells of the same row a plurality of photo-sensing digital function circuits are disposed in a portion of the display cells, and an input end of each of the photo-sensing digital function circuits is coupled to the display cell of the configuration Connected to the scan line, the light sensing digital function circuit determines an output signal of the output end according to a received optical signal and a scan signal received by the input end thereof; a plurality of metal lines, each metal line is coupled An output of the optical sensing digital function circuit that displays the intra-cell; and a position calculation circuit having a plurality of input terminals coupled to the metal lines, the position calculation circuit is configured according to the The signals on these wires determine a corresponding position. The sensing panel of claim 1, wherein the display cells of the same row are connected to different scan lines. The sensing panel of claim 1, wherein if the intensity of the optical signal is greater than or equal to a threshold, the output signal of the optical sensing digital function circuit is proportional to the scanning signal or the delayed signal Scanning signal; otherwise, the output signal of the light sensing digital function circuit is a low voltage level signal or a other DC level. The sensing panel of claim 1, wherein if the intensity of the optical signal is less than a threshold, the output signal of the optical sensing digital function circuit is proportional to the scanning signal or the delayed scanning Signal; otherwise, the light sensing The output signal of the digital function circuit is a low voltage level signal or a other DC level. For example, in the sensing panel described in claim 2, the display cells of each row having the light sensing digital function circuit are arranged in a regular arrangement in the sensing panel. The sensing panel of claim 5, wherein each of the rows of the light sensing digital function circuits is arranged with a fixed number of unconfigured light sensing digital function circuits. These display cells. The sensing panel of claim 1, wherein the position calculating circuit is in contact with or irradiated with the sensing panel when the sensing line is not touched or illuminated. The metal line signals to determine the corresponding position. The sensing panel of claim 1, further comprising a measuring chip, wherein the position calculating circuit is disposed on the measuring chip. The sensing panel of claim 1, wherein each of the optical sensing digital function circuits comprises: an inverter for receiving the scanning signal and outputting a reverse scanning signal; The invertor is coupled to the inverter for receiving the optical signal, and determining whether the output signal is 0 or proportional to the scan signal or delay according to whether the intensity of the optical signal is greater than a threshold value The scan signal; and a diode circuit coupled to the photo-sensing inverter for receiving an output signal of the photo-sensing inverter, if the photo-sensing inverter If the output signal is 0, the output signal of the diode circuit is high impedance. If the output signal of the photo-sensing inverter is proportional to the scan signal, the output signal of the diode circuit is proportional to the scan. Aim the signal.