TW201312518A - Photo-sensing input panel and display apparatus having photo-sensing input mechanism - Google Patents

Abstract

A photo-sensing input panel having high detection sensitivity includes a first gate line for transmitting a first gate signal, a second gate signal for transmitting a second gate signal, a first bias line for transmitting a first bias voltage, a second bias line for transmitting a second bias voltage, a first photo-sensing module, a second photo-sensing module, and a differential circuit. The first photo-sensing module provides a first readout signal through performing a sensing operation on a first incident light according to the first gate signal, the second gate signal and the first bias voltage. The second photo-sensing module provides a second readout signal through performing a sensing operation on a second incident light according to the first gate signal, the second gate signal and the second bias voltage. The differential circuit generates an output signal through performing a differential operation on the first and second readout signals.

Description

Light sensing input panel and display device with light sensing input mechanism

The invention relates to an input panel and a display device with an input mechanism, in particular to a light-sensing input panel and a display device with a light-sensing input mechanism.

In recent years, electronic products with panel input mechanisms have become a popular trend. The display device with an input mechanism is used as a communication interface between the user and the electronic product, so that the user can directly control the operation of the electronic product through the display device. No need to use the keyboard or mouse. The input mechanism of the display device can be divided into a light-sensing input mechanism and a touch input mechanism. Since the touch input mechanism is easy to damage the device due to frequent panel touch actions, the light-sensing input mechanism has a long use. Lifetime has become a technology adopted by many people. Generally, a display device having an optical sensing input mechanism includes a plurality of read lines for transmitting a plurality of read signals, and a plurality of data lines for transmitting a plurality of data signals. Since the data lines are substantially parallel to the read lines, the data lines are transmitted. The data signal will significantly interfere with the read signal of the read line. In addition, the backlight will affect the voltage value of the read signal. Therefore, in order to avoid the input state misjudgment caused by the interference of the data signal and the background light, the differential signal generated by subtracting the two read signals of the adjacent read lines is usually used for the input state judgment, but due to the influence of the incident light The light intensity of the area is Gaussian, so the differential signal according to the judgment of the input state may not be correctly recognized because the voltage value is too small.

Accordingly, it is an object of the present invention to provide a light sensing input mechanism with high detection sensitivity and a display device incorporating such a light sensing input mechanism in a display panel.

According to an embodiment of the invention, a light sensing input panel includes a first gate line for transmitting a first gate signal and a second gate line for transmitting a second gate signal for transmitting a biased first bias line, a second bias line for transmitting a second bias, a first optical sensing mode electrically connected to the first gate line, the second gate line, and the first bias line a second optical sensing module electrically connected to the first gate line, the second gate line and the second bias line, and a differential electrically connected to the first light sensing module and the second light sensing module Circuit. The first light sensing module is configured to perform sensing operation on the first incident light signal according to the first gate signal, the second gate signal and the first bias voltage to provide the first read signal. The second light sensing module is configured to perform sensing operation on the second incident light signal according to the first gate signal, the second gate signal and the second bias voltage to provide the second read signal. The differential circuit is configured to perform a signal differential operation on the first read signal and the second read signal to generate an output signal.

According to an embodiment of the invention, a photo-sensing input panel includes a first gate line for transmitting a first gate signal and a second gate line for transmitting a second gate signal for transmitting a bias voltage line, a first light sensing module electrically connected to the first gate line, the second gate line and the bias line, electrically connected to the first gate line, the second gate line, and the bias a second optical sensing module of the line and a differential circuit electrically connected to the first optical sensing module and the second optical sensing module. The first light sensing module is configured to filter out the first incident light component of the first incident light signal, and is configured to perform sensing operation on the first incident light component according to the first gate signal, the second gate signal, and the bias voltage To provide a first read signal. The second light sensing module is configured to filter out the second incident light component of the second incident light signal, and is configured to perform sensing operation on the second incident light component according to the first gate signal, the second gate signal, and the bias voltage To provide a second read signal. The differential circuit is configured to perform a signal differential operation on the first read signal and the second read signal to generate an output signal.

According to an embodiment of the invention, a display device with an optical sensing input mechanism includes a first gate line for transmitting a first gate signal and a second gate line for transmitting a second gate signal. a first data line for transmitting the first data signal, a second data line for transmitting the second data signal, a first pixel unit electrically connected to the first gate line and the first data line, and electrically connected to a first pixel unit of the first gate line and the second data line, a first bias line for transmitting the first bias, a second bias line for transmitting the second bias, and electrically connected to the first a first light sensing module adjacent to the first pixel unit and electrically connected to the first gate line, the second gate line, and the second bias line a second optical sensing module adjacent to the second pixel unit and the first optical sensing module, a first sensing line electrically connected to the first optical sensing module, and electrically connected to the second optical sensing module a second sense line of the group and a differential circuit electrically connected to the first sense line and the second sense line. The first pixel unit is configured to output the first pixel image signal according to the first gate signal and the first data signal. The second pixel unit is configured to output the second pixel image signal according to the first gate signal and the second data signal. The first light sensing module is configured to perform sensing operation on the first incident light signal according to the first gate signal, the second gate signal and the first bias voltage to provide the first read signal. The second light sensing module is configured to perform sensing operation on the second incident light signal according to the first gate signal, the second gate signal and the second bias voltage to provide the second read signal. The first read line and the second read line are respectively used to transmit the first read signal and the second read signal. The differential circuit is configured to perform a signal differential operation on the first read signal and the second read signal to generate an output signal.

According to an embodiment of the invention, a display device with an optical sensing input mechanism includes a first gate line for transmitting a first gate signal and a second gate line for transmitting a second gate signal. a first data line for transmitting the first data signal, a second data line for transmitting the second data signal, a first pixel unit electrically connected to the first gate line and the first data line, and electrically connected to a first pixel unit of the first gate line and the second data line, a bias line for transmitting a bias voltage, electrically connected to the first gate line, the second gate line, and the bias line and adjacent to the first a first light sensing module of a pixel unit, a second light electrically connected to the first gate line, the second gate line and the bias line and adjacent to the second pixel unit and the first light sensing module The sensing module is electrically connected to the first sensing line of the first optical sensing module, the second sensing line electrically connected to the second optical sensing module, and electrically connected to the first sensing line and the second reading The differential circuit of the line. The first pixel unit is configured to output the first pixel image signal according to the first gate signal and the first data signal. The second pixel unit is configured to output the second pixel image signal according to the first gate signal and the second data signal. The first light sensing module is configured to filter out the first incident light component of the first incident light signal, and is configured to perform sensing operation on the first incident light component according to the first gate signal, the second gate signal, and the bias voltage To provide a first read signal. The second light sensing module is configured to filter out the second incident light component of the second incident light signal, and is configured to perform sensing operation on the second incident light component according to the first gate signal, the second gate signal, and the bias voltage To provide a second read signal. The first read line and the second read line are respectively used to transmit the first read signal and the second read signal. The differential circuit is configured to perform a signal differential operation on the first read signal and the second read signal to generate an output signal.

By applying a different bias voltage, and/or filtering out the different incident light components, two read signals can be significantly improved when the incident light intensity received by the two adjacent light sensing modules is similar. Light sensitivity. In addition, by integrating a light-sensing input mechanism with high detection sensitivity into a display panel including a pixel unit, the device can be made thinner and lighter and can reduce production costs.

In the following, the optical sensing input panel and the display device with the optical sensing input mechanism according to the present invention are described in detail with reference to the accompanying drawings, but the embodiments are not intended to limit the scope of the invention.

1 is a schematic view of a light sensing input panel according to a first embodiment of the present invention. As shown in FIG. 1, the optical sensing input panel 100 includes a plurality of gate lines 101, a plurality of first read lines 103, a plurality of second read lines 104, a plurality of first bias lines 105, and a plurality of second bias lines 106. The plurality of first light sensing modules 110, the plurality of second light sensing modules 150, and the differential circuit 180. The gate line GLn and the gate line GLn+1 of the complex gate line 101 are used to transmit the gate signal SGn and the gate signal SGn+1, respectively. The first bias line BXn+1 of the plurality of first bias lines 105 is used to transmit the first bias voltage VBXn+1. The second bias line BYn+1 of the plurality of second bias lines 106 is used to transmit the second bias voltage VBYn+1. The first read line RLX_m of the plurality of first read lines 103 is used to transmit the first read signal SXro_m. The second read line RLY_m of the plurality of second read lines 104 is used to transmit the second read signal SYro_m. The first optical sensing module DAX_m electrically connected to the gate line GLn, the gate line GLn+1 and the first bias line BXn+1 is used for the gate signal SGn, the gate signal SGn+1 and the first bias The voltage VBXn+1 performs an inductive operation on the first incident light signal to provide a first read signal SXro_m. The second photo sensing module DAY_m electrically connected to the gate line GLn, the gate line GLn+1 and the second bias line BYn+1 is used according to the gate signal SGn, the gate signal SGn+1 and the second bias The voltage VBYn+1 performs an inductive operation on the second incident light signal to provide a second read signal SYro_m. Please note that in the embodiment shown in FIG. 1, the second optical sensing module DAY_m is adjacent to the first optical sensing module DAX_m, and the first incident optical signal and the second incident optical signal are respectively incident on the first The light sensing module DAX_m and the second light sensing module DAY_m. In another embodiment, the first light sensing module DAX_m and the second light sensing module DAY_m are spaced apart from each other by at least one light sensing module 110/150. The differential circuit 180 electrically connected to the first read line RLX_m and the second read line RLY_m is configured to perform a signal differential operation on the first read signal SXro_m and the second read signal SYro_m to generate an output signal Sout.

The first light sensing module DAX_m includes a first light sensing unit 120, a first energy storage unit 130, and a first sensing unit 135. The first light sensing unit 120 electrically connected to the first bias line BXn+1 and the gate line GLn+1 is configured to perform a first incident light signal according to the first bias voltage VBXn+1 and the gate signal SGn+1. The sensing operation operates to generate a first induced voltage VXs_m. The first energy storage unit 130 is configured to store the first induced voltage VXs_m. The first readout unit 135 electrically connected to the first energy storage unit 130 and the gate line GLn is configured to provide the first read signal SXro_m according to the first induced voltage VXs_m and the gate signal SGn. The second light sensing module DAY_m includes a second light sensing unit 160, a second energy storage unit 170, and a second readout unit 175. The second light sensing unit 160 electrically connected to the second bias line BYn+1 and the gate line GLn+1 is configured to perform the second incident light signal according to the second bias voltage VBYn+1 and the gate signal SGn+1. The sensing operation operates to generate a second induced voltage VYs_m. The second energy storage unit 170 is configured to store the second induced voltage VYs_m. The second readout unit 175 electrically connected to the second energy storage unit 170 and the gate line GLn is configured to provide the second read signal SYro_m according to the second induced voltage VYs_m and the gate signal SGn.

In the embodiment of FIG. 1 , the first light sensing unit 120 includes a first photo-induced transistor 121 , the first energy storage unit 130 includes a first capacitor 131 , and the first sensing unit 135 includes a first readout transistor 136 . The second light sensing unit 160 includes a second photo-induced transistor 161, the second energy storage unit 170 includes a second capacitor 171, and the second sensing unit 175 includes a second readout transistor 176. The first photo-inductive transistor 121 has a first end electrically connected to the first capacitor 131, a gate terminal electrically connected to the gate line GLn+1, and a second end electrically connected to the first bias line BXn+1. The first readout transistor 136 has a first end electrically connected to the first capacitor 131, a gate terminal electrically connected to the gate line GLn, and a second end electrically connected to the first readout line RLX_m. The second photo-induced transistor 161 has a first end electrically connected to the second capacitor 171, a gate terminal electrically connected to the gate line GLn+1, and a second end electrically connected to the second bias line BYn+1. The second readout transistor 176 has a first end electrically connected to the second capacitor 171, a gate terminal electrically connected to the gate line GLn, and a second end electrically connected to the second readout line RLY_m.

2 is a waveform diagram of the operation-related signal of the optical sensing input panel of FIG. 1 based on the first driving method of the present invention, wherein the horizontal axis is the time axis. In the second figure, the signals from top to bottom are the gate signal SGn, the gate signal SGn+1, the first bias voltage VBXn+1, the second bias voltage VBYn+1, the first induced voltage VXs_m, and the Two induced voltages VYs_m. Referring to FIG. 2 and FIG. 1 , in the period T11, the gate signal SGn+1 having a high voltage level can turn on the first photo-inducting transistor 121 and the second photo-inducting transistor 161 to thereby turn on the first induced voltage. VXs_m is pulled up to the high voltage level VH of the first bias voltage VBXn+1, and the second induced voltage VYs_m is pulled up to the high voltage level VH of the second bias voltage VBYn+1. During the period T12, the gate signal SGn+1 having a low voltage level can turn off the first photo-inducting transistor 121 and the second photo-inducting transistor 161. At this time, the first photo-inducting transistor 121 senses the first incident light. The first photocurrent is generated by the signal, and the second photo-induced transistor 161 generates a second photocurrent by inducing the second incident optical signal, and the first photocurrent and the second photocurrent are respectively applicable to the first capacitor 131 and the first The second capacitor 171 performs a discharge operation. Please note that since the low voltage level VL1 of the first bias voltage VBXn+1 is significantly lower than the low voltage level VL2 of the second bias voltage VBYn+1 in the period T12, the first photo current may be significantly larger than the second light. The current, and the voltage drop of the first induced voltage VXs_m is significantly greater than the voltage drop of the second induced voltage VYs_m. Further, in the operation in which the incident light is not applied, the first induced voltage VXs_m and the second induced voltage VYs_m are maintained at a fixed voltage for almost the period T12.

During the period T13, the gate signal SGn having a high voltage level can turn on the first readout transistor 136 and the second readout transistor 176, and the first readout transistor 136 can be based on the gate signal SGn and the first An induced voltage VXs_m outputs a first read signal SXro_m, and the second read transistor 176 outputs a second read signal SYro_m according to the gate signal SGn and the second induced voltage VYs_m. The first read signal SXro_m and the second read signal SYro_m are respectively output to the differential circuit 180 through the first read line RLX_m and the second read line RLY_m, so that the operation of a light sensing period is completed, and then the differential is performed. The circuit 180 can differentially operate the first read signal SXro_m and the second read signal SYro_m to generate an output signal Sout. As described above, the voltage drop of the first induced voltage VXs_m is significantly greater than the voltage drop of the second induced voltage VYs_m, so even if the intensity difference between the intensity of the first incident light signal and the second incident light signal is small, the first readout The voltage value of the signal SXro_m can still be significantly different from the voltage value of the second read signal SYro_m, thereby significantly increasing the voltage difference between the first read signal SXro_m and the second read signal SYro_m, thereby improving the light sensing sensitivity. In another embodiment, the low voltage level VL2 of the second bias voltage VBYn+1 can be significantly lower than the low voltage level VL1 of the first bias voltage VBXn+1, so that the first read signal SXro_m can also be significantly increased. The voltage difference of the second read signal SYro_m is to improve the light sensing sensitivity.

Please note that the light-sensing input panel 100 can also perform incident light intensity determination according to the following operation mode. Since the first light sensing module 110 and the second light sensing module 150 are disposed adjacent to each other or are closely arranged, the intensity of the first incident light signal and the second incident light signal respectively sensed by the two light sensing modules are similar. When the intensity of the first incident light signal and the second incident light signal are both less than a predetermined value (for example, only by ambient light), the low voltage level VL1 of the first bias voltage VBXn+1 is significant in the period T12. Lower than the low voltage level VL2 of the second bias voltage VBYn+1, the first photocurrent can be significantly larger than the second photocurrent, and the voltage drop of the first induced voltage VXs_m is significantly larger than the voltage drop of the second induced voltage VYs_m. Therefore, the voltage value of the first read signal SXro_m is significantly different from the voltage value of the second read signal SYro_m. In addition, when the intensity of the first incident light signal and the second incident light signal are both greater than a predetermined value (for example, illuminated by a touch light pen), the first photo current and the second photo current are both sufficiently large to respectively be in the period T12. The charge of one of the energy storage unit 130 and the second energy storage unit 170 is exhausted, so that the first induced voltage VXs_m and the second induced voltage VYs_m are both reduced to substantially the same level, thereby causing the voltage of the first read signal SXro_m The value is substantially equal to the voltage value of the second read signal SYro_m. Therefore, the differential circuit 180 cooperates with the operation of the first light sensing module 110 and the second light sensing module 150 to determine the ambient light illumination condition and the touch light pen illumination condition based on the first driving method of the present invention.

3 is a waveform diagram of the operation-related signal of the optical sensing input panel of FIG. 1 based on the second driving method of the present invention, wherein the horizontal axis is the time axis. In FIG. 3, the signals from top to bottom are gate signal SGn, gate signal SGn+1, first bias voltage VBXn+1, second bias voltage VBYn+1, first induced voltage VXs_m, and Two induced voltages VYs_m. Referring to FIG. 3 and FIG. 1 , in the period T21, the gate signal SGn+1 having a high voltage level can turn on the first photo-inducting transistor 121 and the second photo-inducting transistor 161 to thereby turn on the first induced voltage. VXs_m is pulled down to the low voltage level VL of the first bias voltage VBXn+1, and the second induced voltage VYs_m is pulled up to the high voltage level VH of the second bias voltage VBYn+1. During the period T22, the gate signal SGn+1 having a low voltage level can turn off the first photo-inducting transistor 121 and the second photo-inducting transistor 161. At this time, the first photo-inducting transistor 121 senses the first incident light. The first photocurrent is generated by the signal, and the second photo-induced transistor 161 generates a second photocurrent by inducing the second incident optical signal, and the first photocurrent and the second photocurrent are respectively applicable to the first capacitor 131 and the first The second capacitor 171 performs charging/discharging operation. Please note that since the pulse wave of the first bias voltage VBXn+1 is a negative pulse wave, and the pulse wave of the second bias voltage VBYn+1 is a forward pulse wave, the first induced voltage VXs_m and the second induced voltage VYs_m The voltage polarity is reversed. Further, in the operation in which the incident light is not applied, the first induced voltage VXs_m and the second induced voltage VYs_m are maintained at a fixed voltage for almost the period T22.

During the period T23, the gate signal SGn having a high voltage level can turn on the first readout transistor 136 and the second readout transistor 176, and the first readout transistor 136 can be based on the gate signal SGn and the first An induced voltage VXs_m outputs a first read signal SXro_m, and the second read transistor 176 outputs a second read signal SYro_m according to the gate signal SGn and the second induced voltage VYs_m. The first read signal SXro_m and the second read signal SYro_m are respectively output to the differential circuit 180 through the first read line RLX_m and the second read line RLY_m, so that the operation of a light sensing period is completed, and then the differential is performed. The circuit 180 can differentially operate the first read signal SXro_m and the second read signal SYro_m to generate an output signal Sout. As described above, the voltages of the first induced voltage VXs_m and the second induced voltage VYs_m are opposite in polarity, so that even if the intensity difference between the intensity of the first incident light signal and the second incident light signal is small, the first read signal SXro_m is negative. The voltage value can still be significantly different from the positive voltage value of the second read signal SYro_m, thereby significantly increasing the voltage difference between the first read signal SXro_m and the second read signal SYro_m, thereby improving the light sensing sensitivity. Please note that in another embodiment, the pulse wave of the first bias voltage VBXn+1 is a forward pulse wave, and the pulse wave of the second bias voltage VBYn+1 is a negative pulse wave, so that the first wave can be significantly increased. The voltage difference between the read signal SXro_m and the second read signal SYro_m is read to improve the light sensing sensitivity.

Figure 4 is a schematic view of a light sensing input panel of a second embodiment of the present invention. As shown in FIG. 4 , the optical sensing input panel 200 includes a plurality of gate lines 201 , a plurality of first read lines 203 , a plurality of second read lines 204 , a plurality of bias lines 205 , and a plurality of first light sensing modules 210 . A plurality of second light sensing modules 250 and a differential circuit 280. The gate line GLn and the gate line GLn+1 of the complex gate line 201 are used to transmit the gate signal SGn and the gate signal SGn+1, respectively. The bias line BLn+1 of the complex bias line 205 is used to transmit the bias voltage VBn+1. The first read line RLX_m of the plurality of first read lines 203 is used to transmit the first read signal SXro_m. The second read line RLY_m of the plurality of second read lines 204 is used to transmit the second read signal SYro_m. The first light sensing module DBX_m electrically connected to the gate line GLn, the gate line GLn+1 and the bias line BLn+1 is used to filter out the first incident light component of the first incident light signal and is used to The pole signal SGn, the gate signal SGn+1, and the bias voltage VBn+1 perform an inductive operation on the first incident light component to provide a first read signal SXro_m. The second light sensing module DBY_m electrically connected to the gate line GLn, the gate line GLn+1 and the bias line BLn+1 is used to filter out the second incident light component of the second incident light signal and is used to The pole signal SGn, the gate signal SGn+1, and the bias voltage VBn+1 perform an inductive operation on the second incident light component to provide a second read signal SYro_m. Please note that in the embodiment shown in FIG. 4, the second optical sensing module DBY_m is adjacent to the first optical sensing module DBX_m, and the first incident optical signal and the second incident optical signal are respectively incident to the first The light sensing module DBX_m and the second light sensing module DBY_m. In another embodiment, the first light sensing module DBX_m and the second light sensing module DBY_m are spaced apart from each other by at least one light sensing module 210/250. The differential circuit 280 electrically connected to the first read line RLX_m and the second read line RLY_m is configured to perform a signal differential operation on the first read signal SXro_m and the second read signal SYro_m to generate an output signal Sout.

The first light sensing module DBX_m includes a first light sensing unit 220, a first energy storage unit 230, and a first reading unit 235. The first light sensing unit 220 electrically connected to the bias line BLn+1 and the gate line GLn+1 is configured to filter out the first incident light component of the first incident light signal that falls within the first optical wavelength range, and is used to The sensing operation of the first incident light signal is performed according to the bias voltage VBn+1 and the gate signal SGn+1 to generate the first induced voltage VXs_m. The first energy storage unit 230 is configured to store the first induced voltage VXs_m. The first readout unit 235 electrically connected to the first energy storage unit 230 and the gate line GLn is configured to provide the first read signal SXro_m according to the first induced voltage VXs_m and the gate signal SGn. The second light sensing module DBY_m includes a second light sensing unit 260, a second energy storage unit 270, and a second reading unit 275. The second light sensing unit 260 electrically connected to the bias line BLn+1 and the gate line GLn+1 is configured to filter out the second incident light component of the second incident light signal that falls within the second optical wavelength range, and is used to The sensing operation of the second incident light component is performed according to the bias voltage VBn+1 and the gate signal SGn+1 to generate the second induced voltage VYs_m. Please note that the second wavelength range of light may not overlap or partially overlap the first range of wavelengths of light. The second energy storage unit 270 is configured to store the second induced voltage VYs_m. The second readout unit 275 electrically connected to the second energy storage unit 270 and the gate line GLn is configured to provide the second read signal SYro_m according to the second induced voltage VYs_m and the gate signal SGn.

In the embodiment of FIG. 4, the first light sensing unit 220 includes a first photo-induced transistor 221 and a first filter element 222. The first energy storage unit 230 includes a first capacitor 231, the first sensing unit 235 includes a first readout transistor 236, and the second light sensing unit 260 includes a second photo-induced transistor 261 and a second filter element 262. The second energy storage unit 270 includes a second capacitor 271, and the second read unit 275 includes a second readout transistor 276. The first photo-inductive transistor 221 has a first end electrically connected to the first capacitor 231, a gate terminal electrically connected to the gate line GLn+1, and a second end electrically connected to the bias line BLn+1. The first filter element 222 corresponding to the first photo-induced transistor 221 is used to filter out the first incident light component of the first incident light signal. The first readout transistor 236 has a first end electrically connected to the first capacitor 231, a gate terminal electrically connected to the gate line GLn, and a second end electrically connected to the first sense line RLX_m. The second photo-inductive transistor 261 has a first end electrically connected to the second capacitor 271, a gate terminal electrically connected to the gate line GLn+1, and a second end electrically connected to the bias line BLn+1. The second filter element 262 corresponding to the second photo-induced transistor 261 is used to filter out the second incident light component of the second incident light signal. In another embodiment, any one of the first filter element 222 and the second filter element 262 is a light-shielding element. For example, when the second filter element 262 is a light-shielding element, the intensity of the second incident light component is substantially zero. The second readout transistor 276 has a first end electrically connected to the second capacitor 271, a gate terminal electrically connected to the gate line GLn, and a second end electrically connected to the second readout line RLY_m.

It can be seen from the above that even if the intensity difference between the intensity of the first incident light signal and the second incident light signal is small, the intensity of the first incident light component is still maintained by the operation of the first filter element 222 and the second filter element 262. The voltage of the first induced voltage VXs_m can be significantly different from the voltage drop of the second induced voltage VYs_m, so that the voltage value of the first read signal SXro_m is significantly different from the second The voltage value of the read signal SYro_m is used to significantly increase the voltage difference between the first read signal SXro_m and the second read signal SYro_m, thereby improving the light sensing sensitivity.

Fig. 5 is a schematic view showing a light sensing input panel of a third embodiment of the present invention. As shown in FIG. 5 , the optical sensing input panel 300 is similar to the optical sensing input panel 100 shown in FIG. 1 . The main difference is that the plurality of first optical sensing modules 110 are replaced by a plurality of first optical sensing modules 310 . And replacing the plurality of second light sensing modules 150 with the plurality of second light sensing modules 350, wherein the first light sensing module DAX_m is replaced by the first light sensing module DCX_m, and the second light sensing module DAY_m It is replaced with a second light sensing module DCY_m. The first light sensing module DCX_m includes a first light sensing unit 320, a first energy storage unit 130, and a first sensing unit 135. The second light sensing module DCY_m includes a second light sensing unit 360, a second energy storage unit 170, and a second readout unit 175. The first light sensing unit 320 includes a first photo-induced transistor 321 and a first filter element 322. The second light sensing unit 360 includes a second light sensing transistor 361 and a second filter element 362. The first filter element 322 corresponding to the first photo-induced transistor 321 is configured to filter out the first incident light component of the first incident light signal that falls within the first optical wavelength range, and the first photo-induced transistor 321 The sensing operation of the first incident light component is performed according to the first bias voltage VBXn+1 and the gate signal SGn+1 to generate the first induced voltage VXs_m. The second filter element 362 corresponding to the second photo-induced transistor 361 is configured to filter out the second incident light component of the second incident light signal that falls within the second optical wavelength range, and the second photo-induced transistor 361 The sensing operation of the second incident light component is performed according to the second bias voltage VBYn+1 and the gate signal SGn+1 to generate the second induced voltage VYs_m. Similarly, the second wavelength range of light may not overlap or partially overlap the first range of wavelengths of light. In another embodiment, the second filter element 362 is a light blocking element and the intensity of the second incident light component is substantially zero.

It can be seen from the above that even if the intensity difference between the intensity of the first incident light signal and the second incident light signal is small, the operation of the first filter element 322 and the second filter element 362 is combined with the first application of the difference. The first induced voltage VXs_m can be significantly different from the second induced voltage VYs_m, and the voltage value of the first read signal SXro_m is significantly different from the second read signal SYro_m. The voltage value is used to significantly increase the voltage difference between the first read signal SXro_m and the second read signal SYro_m, thereby improving the light sensing sensitivity.

Figure 6 is a schematic diagram of a display device with a light sensing input mechanism according to a fourth embodiment of the present invention. As shown in FIG. 6, the display device 400 further includes a plurality of first pixel units 491, a plurality of second pixel units 492, a plurality of first data lines 401, and a structure of the light sensing input panel 100 of FIG. A plurality of second data lines 402. The first data line DLXm of the plurality of first data lines 401 is used to transmit the first data signal SDXm. The second data line DLYm of the plurality of second data lines 402 is used to transmit the second data signal SDYm. The first pixel unit PXm of the plurality of first pixel units 491 is electrically connected to the gate line GLn and the first data line DLXm, and is adjacent to the first light sensing module DAX_m. The first pixel unit PXm is configured to output the first pixel image signal according to the gate signal SGn and the first data signal SDXm. The second pixel unit PYm of the plurality of second pixel units 492 is electrically connected to the gate line GLn and the second data line DLYm, and is adjacent to the second light sensing module DAY_m. The second pixel unit PYm is configured to output a second pixel image signal according to the gate signal SGn and the second data signal SDYm. That is to say, in the structure of the display device 400, the optical sensing input mechanism with high detection sensitivity is integrated in the display panel including the pixel unit, so that the device can be made thinner and thinner and can reduce the production cost.

Figure 7 is a schematic diagram of a display device with a light sensing input mechanism according to a fifth embodiment of the present invention. As shown in FIG. 7, the display device 500 further includes a plurality of first pixel units 591, a plurality of second pixel units 592, a plurality of first data lines 501, and a structure of the light sensing input panel 200 of FIG. A plurality of second data lines 502. The first data line DLXm of the plurality of first data lines 501 is used to transmit the first data signal SDXm. The second data line DLYm of the plurality of second data lines 502 is used to transmit the second data signal SDYm. The first pixel unit PXm of the plurality of first pixel units 591 is electrically connected to the gate line GLn and the first data line DLXm, and is adjacent to the first light sensing module DBX_m. The first pixel unit PXm is configured to output the first pixel image signal according to the gate signal SGn and the first data signal SDXm. The second pixel unit PYm of the plurality of second pixel units 592 is electrically connected to the gate line GLn and the second data line DLYm, and is adjacent to the second light sensing module DBY_m. The second pixel unit PYm is configured to output a second pixel image signal according to the gate signal SGn and the second data signal SDYm. That is to say, in the structure of the display device 500, the optical sensing input mechanism with high detection sensitivity is integrated in the display panel including the pixel unit, so that the device can be made thinner and thinner and can reduce the production cost.

Figure 8 is a schematic diagram of a display device with a light sensing input mechanism according to a sixth embodiment of the present invention. As shown in FIG. 8, the display device 600 further includes a plurality of first pixel units 691, a plurality of second pixel units 692, a plurality of first data lines 601, and a structure of the light sensing input panel 300 of FIG. A plurality of second data lines 602. The first data line DLXm of the plurality of first data lines 601 is used to transmit the first data signal SDXm. The second data line DLYm of the plurality of second data lines 602 is used to transmit the second data signal SDYm. The first pixel unit PXm of the plurality of first pixel units 691 is electrically connected to the gate line GLn and the first data line DLXm, and is adjacent to the first light sensing module DCX_m. The first pixel unit PXm is configured to output the first pixel image signal according to the gate signal SGn and the first data signal SDXm. The second pixel unit PYm of the plurality of second pixel units 692 is electrically connected to the gate line GLn and the second data line DLYm, and is adjacent to the second light sensing module DCY_m. The second pixel unit PYm is configured to output a second pixel image signal according to the gate signal SGn and the second data signal SDYm. That is to say, in the structure of the display device 600, the optical sensing input mechanism with high detection sensitivity is integrated in the display panel including the pixel unit, so that the device can be made thinner and thinner and the production cost can be reduced.

In summary, by applying a different bias voltage, and/or by the operation of the dissimilar filter element, the optical inductive input mechanism of the present invention can be used when the incident light intensity received by two adjacent optical sensing modules is similar. , two readout signals that produce significant differences to improve light sensitivity. In addition, the display device of the present invention integrates the above-mentioned optical sensing input mechanism with high detection sensitivity into the display panel including the pixel unit, so that the device can be made thinner and thinner and can reduce the production cost.

While the present invention has been described above by way of example, it is not intended to limit the invention, and 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.

100, 200, 300. . . Light sensing input panel

101, 201. . . Gate line

103, 203. . . First readout line

104, 204. . . Second readout line

105. . . First bias line

106. . . Second bias line

110, 210, 310. . . First light sensing module

120, 220, 320. . . First light sensing unit

121, 221, 321. . . First photo-inductive transistor

130, 230. . . First energy storage unit

131, 231. . . First capacitor

135, 235. . . First readout unit

136, 236. . . First readout transistor

150, 250, 350. . . Second light sensing module

160, 260, 360. . . Second light sensing unit

161, 261, 361. . . Second photo-induced transistor

170, 270. . . Second energy storage unit

171, 271. . . Second capacitor

175, 275. . . Second readout unit

176, 276. . . Second readout transistor

180, 280. . . Differential circuit

205. . . Bias line

222, 322. . . First filter element

262, 362. . . Second filter element

400, 500, 600. . . Display device

401, 501, 601. . . First data line

402, 502, 602. . . Second data line

491, 591, 691. . . First pixel unit

492, 592, 692. . . First pixel unit

BLn+1. . . Bias line

BXn+1. . . First bias line

BYn+1. . . Second bias line

DAX_m, DBX_m, DCX_m. . . First light sensing module

DAY_m, DBY_m, DCY_m. . . Second light sensing module

DLXm. . . First data line

DLYm. . . Second data line

GLn, GLn+1. . . Gate line

RLX_m. . . First readout line

RLY_m. . . Second readout line

SDXm. . . First data signal

SDYm. . . Second data signal

SGn, SGn+1. . . Gate signal

Sout. . . Output signal

SXro_m. . . First read signal

SYro_m. . . Second read signal

T11～T13, T21～T23. . . Time slot

VBn+1. . . bias

VH. . . High voltage level

VL, VL1, VL2. . . Low voltage level

VXs_m. . . First induced voltage

VYs_m. . . Second induced voltage

VBXn+1. . . First bias

VBYn+1. . . Second bias

1 is a schematic view of a light sensing input panel according to a first embodiment of the present invention.

2 is a waveform diagram of the operation-related signal of the optical sensing input panel of FIG. 1 based on the first driving method of the present invention, wherein the horizontal axis is the time axis.

3 is a waveform diagram of the operation-related signal of the optical sensing input panel of FIG. 1 based on the second driving method of the present invention, wherein the horizontal axis is the time axis.

Figure 4 is a schematic view of a light sensing input panel of a second embodiment of the present invention.

Fig. 5 is a schematic view showing a light sensing input panel of a third embodiment of the present invention.

Figure 6 is a schematic diagram of a display device with a light sensing input mechanism according to a fourth embodiment of the present invention.

Figure 7 is a schematic diagram of a display device with a light sensing input mechanism according to a fifth embodiment of the present invention.

Figure 8 is a schematic diagram of a display device with a light sensing input mechanism according to a sixth embodiment of the present invention.

100. . . Light sensing input panel

101. . . Gate line

103. . . First readout line

104. . . Second readout line

105. . . First bias line

106. . . Second bias line

110. . . First light sensing module

120. . . First light sensing unit

121. . . First photo-inductive transistor

130. . . First energy storage unit

131. . . First capacitor

135. . . First readout unit

136. . . First readout transistor

150. . . Second light sensing module

160. . . Second light sensing unit

161. . . Second photo-induced transistor

170. . . Second energy storage unit

171. . . Second capacitor

175. . . Second readout unit

176. . . Second readout transistor

180. . . Differential circuit

BXn+1. . . First bias line

BYn+1. . . Second bias line

DAX_m. . . First light sensing module

DAY_m. . . Second light sensing module

GLn, GLn+1. . . Gate line

RLX_m. . . First readout line

RLY_m. . . Second readout line

SGn, SGn+1. . . Gate signal

Sout. . . Output signal

SXro_m. . . First read signal

SYro_m. . . Second read signal

VXs_m. . . First induced voltage

VYs_m. . . Second induced voltage

VBXn+1. . . First bias

VBYn+1. . . Second bias

Claims (24)

An optical sensing input panel includes: a first gate line for transmitting a first gate signal; a second gate line for transmitting a second gate signal; and a first bias line, For transmitting a first bias voltage; a second bias line for transmitting a second bias voltage; a first light sensing module electrically connected to the first gate line, the second gate line, and The first light sensing module is configured to perform sensing operation on a first incident light signal according to the first gate signal, the second gate signal, and the first bias voltage to provide a first read signal; a second light sensing module electrically connected to the first gate line, the second gate line and the second bias line, the second light sensing module is configured to The first gate signal, the second gate signal and the second bias voltage sense a second incident light signal to provide a second read signal; and a differential circuit electrically connected to the first An optical sensing module and the second optical sensing module, the differential circuit is configured to perform the signal on the first read signal and the second read signal The differential operation to generate an output signal. The light-sensing input panel of claim 1, wherein the second light-sensing module is adjacent to the first light-sensing module. The optical sensing input panel of claim 1, further comprising a first readout line electrically connected to the first optical sensing module and the differential circuit, wherein the first readout line is used to transmit the first And the second readout line is electrically connected to the second optical sensing module and the differential circuit, wherein the second readout line is configured to transmit the second read signal; wherein: the first The light sensing module includes: a first light sensing unit electrically connected to the first bias line and the second gate line, wherein the first light sensing unit is configured to use the first bias voltage and the second gate The pole signal performs an inductive operation on the first incident light signal to generate a first induced voltage; a second energy storage unit stores the first induced voltage; and a first readout unit electrically connected to the first An first energy storage unit and the first gate line, wherein the first sensing unit is configured to provide the first read signal according to the first induced voltage and the first gate signal; and the second light sensing mode The group includes: a second light sensing unit electrically connected to the second bias line and the second gate line, the first The second light sensing unit is configured to perform an inductive operation on the second incident light signal according to the second bias voltage and the second gate signal to generate a second induced voltage; and a second energy storage unit for storing the second light sensing unit a second sensing unit; and a second sensing unit electrically connected to the second energy storage unit and the first gate line, wherein the second sensing unit is configured to use the second induced voltage and the first gate The pole signal provides the second read signal. The light-sensing input panel of claim 3, wherein the first light-sensing unit comprises a first light-sensitive transistor, the first light-sensing transistor having a first electrical connection to the first energy storage unit a terminal electrically connected to the gate of the second gate line and a second end electrically connected to the first bias line; the first energy storage unit includes an electrical connection to the first photo-inductive transistor a first capacitor; the first readout transistor includes a first readout transistor, the first readout transistor has a first end electrically connected to the first capacitor, and an electrical connection to the first gateline a gate terminal and a second terminal for outputting the first read signal; the second light sensing unit includes a second photo-induced transistor, the second photo-inductive transistor having an electrical connection to the second a first end of the energy storage unit, a gate terminal electrically connected to the second gate line, and a second end electrically connected to the second bias line; the second energy storage unit includes an electrical connection a second capacitor of the two photoinduction transistor; and the second readout unit includes a second readout transistor The second readout transistor has a first end electrically connected to the second capacitor, a gate terminal electrically connected to the first gate line, and a second end for outputting the second read signal . The light-sensing input panel of claim 1, wherein the first light-sensing module comprises a first filter element, wherein the first filter element is configured to filter out the first incident light signal and fall on the first An incident light component of the first light wavelength range; and the second light sensing module includes a second filter component, wherein the second filter component is configured to filter out the second incident light signal and fall on a second light An incident light component of a wavelength range; wherein the second optical wavelength range does not overlap or partially overlap the first optical wavelength range. The light-sensing input panel of claim 1, wherein the first light-sensing module comprises a first filter element, wherein the first filter element is configured to filter out the first incident light signal and fall on the first An incident light component of the first light wavelength range; and the second light sensing module includes a light blocking component for shielding the second incident light signal. The light-sensing input panel of claim 1, wherein the pulse wave of the first bias voltage is opposite to the pulse wave of the second bias voltage. The light-sensing input panel of claim 1, wherein the low voltage level of the first bias voltage is different from the low voltage level of the second bias voltage. An optical sensing input panel includes: a first gate line for transmitting a first gate signal; a second gate line for transmitting a second gate signal; and a bias line for Transmitting a bias voltage; a first light sensing module electrically connected to the first gate line, the second gate line, and the bias line, wherein the first light sensing module is configured to filter out a first a first incident light component of the incident light signal, and configured to perform sensing operation on the first incident light component according to the first gate signal, the second gate signal, and the bias voltage to provide a first read signal a second light sensing module electrically connected to the first gate line, the second gate line and the bias line, wherein the second light sensing module is configured to filter out a second incident light signal a second incident light component, configured to perform an inductive operation on the second incident light component according to the first gate signal, the second gate signal, and the bias voltage to provide a second read signal; and a difference a dynamic circuit electrically connected to the first light sensing module and the second light sensing module, wherein the differential circuit is used to Performing a read signal of the differential signal and the second read operation of a signal to produce an output signal. The light-sensing input panel of claim 9, wherein the second light-sensing module is adjacent to the first light-sensing module. The optical sensing input panel of claim 9, further comprising a first readout line electrically connected to the first optical sensing module and the differential circuit, wherein the first readout line is used to transmit the first And the second readout line is electrically connected to the second optical sensing module and the differential circuit, wherein the second readout line is configured to transmit the second read signal; wherein: the first The light sensing module includes: a first light sensing unit electrically connected to the bias line and the second gate line, wherein the first light sensing unit is configured to filter out the first incident light signal and fall on the first The first incident light component of a light wavelength range, and configured to perform an inductive operation on the first incident light component according to the bias voltage and the second gate signal to generate a first induced voltage; a first energy storage unit And storing a first sensing voltage; and a first sensing unit electrically connected to the first energy storage unit and the first gate line, wherein the first sensing unit is configured to use the first sensing voltage And the first gate signal to provide the first read signal; and the second light sensing module includes a second light sensing unit electrically connected to the bias line and the second gate line, wherein the second light sensing unit is configured to filter out the second incident light signal and fall within a second wavelength range The second incident light component is configured to perform an inductive operation on the second incident light component according to the bias voltage and the second gate signal to generate a second induced voltage; a second energy storage unit for storing the a second sensing unit; and a second sensing unit electrically connected to the second energy storage unit and the first gate line, wherein the second sensing unit is configured to use the second induced voltage and the first gate The pole signal provides the second read signal; wherein the second light wavelength range does not overlap or partially overlap the first light wavelength range. The light-sensing input panel of claim 11, wherein: the first light-sensing unit comprises a first light-sensitive transistor, the first light-sensing transistor having a first electrical connection to the first energy storage unit a terminal electrically connected to the gate terminal of the second gate line and a second end electrically connected to the bias line; the first energy storage unit includes a first electrically connected to the first photo-inductive transistor a first readout transistor includes a first readout transistor, the first readout transistor having a first end electrically connected to the first capacitor and an electrical connection to the first gate line a gate terminal and a second terminal for outputting the first read signal; the second light sensing unit includes a second photo-sensing transistor having an electrical connection to the second bank a first end of the energy unit, a gate terminal electrically connected to the second gate line, and a second end electrically connected to the bias line; the second energy storage unit includes an electrical connection to the second light a second capacitor of the inductive transistor; and the second readout unit includes a second readout transistor, Two read-out transistor having a second capacitor electrically connected to the first terminal, a gate terminal electrically connected to the first gate line, and a second terminal for outputting the second read-out signals. The light-sensing input panel of claim 9, wherein the first light-sensing module comprises a first filter element, and the first filter element is configured to filter out the first of the first incident light signals. An incident light component; and the second light sensing module includes a second filter component for filtering the second incident light component of the second incident light signal. The light-sensing input panel of claim 9, wherein the first light-sensing module comprises a first filter element, and the first filter element is configured to filter out the first of the first incident light signals. The incident light component; and the second light sensing module includes a light blocking component for shielding the second incident light signal. A display device with a light sensing input mechanism, comprising: a first gate line for transmitting a first gate signal; and a second gate line for transmitting a second gate signal; a data line for transmitting a first data signal; a second data line for transmitting a second data signal; a first pixel unit electrically connected to the first gate line and the first data line, The first pixel unit is configured to output a first pixel image signal according to the first gate signal and the first data signal; a second pixel unit electrically connected to the first gate line and the first pixel unit a second data line, the second pixel unit is configured to output a second pixel image signal according to the first gate signal and the second data signal; and a first bias line for transmitting a first a second bias line for transmitting a second bias voltage; a first light sensing module adjacent to the first pixel unit, electrically connected to the first gate line, the second The first light sensing module is configured to be based on the first gate signal and the second gate And the first bias voltage performs an inductive operation on a first incident light signal to provide a first read signal; a first adjacent to the second pixel unit and adjacent to the first light sensing module The second light sensing module is electrically connected to the first gate line, the second gate line and the second bias line, and the second light sensing module is configured to use the first gate signal according to the first gate signal The second gate signal and the second bias voltage sense a second incident light signal to provide a second read signal; a first read line is electrically connected to the first light sensor module, the first a read line for transmitting the first read signal; a second read line electrically connected to the second light sensing module, the second read line for transmitting the second read signal; and a a differential circuit electrically connected to the first read line and the second read line, wherein the differential circuit is configured to perform a signal differential operation on the first read signal and the second read signal to generate a Output signal. The display device of claim 15, wherein the first light sensing module comprises: a first light sensing unit electrically connected to the first bias line and the second gate line, the first light sensing The unit is configured to perform an induction operation on the incident light signal according to the first bias voltage and the second gate signal to generate a first induced voltage; a first energy storage unit configured to store the first induced voltage; And a first readout unit electrically connected to the first energy storage unit and the first gate line, wherein the first readout unit is configured to provide the first induced voltage and the first gate signal according to the first sense voltage The first optical sensing unit includes: a second optical sensing unit electrically connected to the second bias line and the second gate line, wherein the second light sensing unit is configured to The second bias voltage and the second gate signal perform an inductive operation on the incident light signal to generate a second induced voltage; a second energy storage unit for storing the second induced voltage; and a second read An output unit electrically connected to the second energy storage unit and the first gate line, Two lines for readout unit based on the second sensing voltage and the first gate of the second signal to provide a readout signal. The display device of claim 15, wherein the first light sensing module comprises a first filter element, wherein the first filter element is configured to filter out the first incident light signal to be in a first An incident light component of the light wavelength range; and the second light sensing module includes a second filter component, wherein the second filter component is configured to filter out the second incident light signal to fall within a second wavelength range The incident light component; wherein the second optical wavelength range does not overlap or partially overlap the first optical wavelength range. The display device of claim 15, wherein the first light sensing module comprises a first filter element, wherein the first filter element is configured to filter out the first incident light of the first incident light signal And the second light sensing module includes a light blocking component for shielding the second incident light signal. The display device of claim 15, wherein the pulse wave of the first bias voltage is opposite to the pulse wave of the second bias voltage. The display device of claim 15, wherein the low voltage level of the first bias voltage is different from the low voltage level of the second bias voltage. A display device with a light sensing input mechanism, comprising: a first gate line for transmitting a first gate signal; and a second gate line for transmitting a second gate signal; a data line for transmitting a first data signal; a second data line for transmitting a second data signal; a first pixel unit electrically connected to the first gate line and the first data line, The first pixel unit is configured to output a first pixel image signal according to the first gate signal and the first data signal; a second pixel unit electrically connected to the first gate line and the first pixel unit a second data line, the second pixel unit is configured to output a second pixel image signal according to the first gate signal and the second data signal; a bias line for transmitting a bias voltage; a first light sensing module adjacent to the first pixel unit is electrically connected to the first gate line, the second gate line and the bias line, and the first light sensing module is used Filtering out a first incident light component of a first incident light signal and using the first gate signal and the second gate according to the first gate signal The signal and the biasing perform sensing operation on the first incident light component to provide a first read signal; adjacent to the second pixel unit and adjacent to the second of the first light sensing module The light sensing module is electrically connected to the first gate line, the second gate line and the bias line, and the second light sensing module is configured to filter out a second incident light of the second incident light signal The light component is configured to perform sensing operation on the second incident light component according to the first gate signal, the second gate signal, and the bias voltage to provide a second read signal; a first readout line, Electrically connected to the first optical sensing module, the first sensing line is configured to transmit the first read signal; a second read line is electrically connected to the second optical sensing module, and the second readout a line for transmitting the second read signal; and a differential circuit electrically connected to the first read line and the second read line, the differential circuit is for the first read signal and the The second read signal performs a signal differential operation to generate an output signal. The display device of claim 21, wherein the first light sensing module comprises: a first light sensing unit electrically connected to the bias line and the second gate line, the first light sensing unit The first incident light component falling in a first wavelength range of the first incident light signal is filtered, and is used to sense the first incident light component according to the bias voltage and the second gate signal. Working to generate a first induced voltage; a first energy storage unit for storing the first induced voltage; and a first readout unit electrically connected to the first energy storage unit and the first gate line, The first sensing unit is configured to provide the first read signal according to the first induced voltage and the first gate signal; and the second light sensing module comprises: a second light sensing unit, electrically connected The second light sensing unit is configured to filter out the second incident light component of the second incident light signal that falls within a second optical wavelength range, and is configured to be used according to the bias line and the second gate line The bias voltage and the second gate signal perform a sense of the second incident light component Working to generate a second induced voltage; a second energy storage unit for storing the second induced voltage; and a second readout unit electrically connected to the second energy storage unit and the first gate line, The second readout unit is configured to provide the second read signal according to the second induced voltage and the first gate signal; wherein the second optical wavelength range does not overlap or partially overlap the first optical wavelength range . The display device of claim 21, wherein the first light sensing module comprises a first filter element, wherein the first filter element is configured to filter out the first incident light of the first incident light signal And the second light sensing module includes a second filter element, wherein the second filter element is configured to filter out the second incident light component of the second incident light signal; wherein the second light wavelength range The first optical wavelength range is not overlapped or partially overlapped. The display device of claim 21, wherein the first light sensing module comprises a first filter element, wherein the first filter element is configured to filter out the first incident light of the first incident light signal And the second light sensing module includes a light blocking component for shielding the second incident light signal.