TWI467445B - Sensing display device and touch detection method thereof - Google Patents

Description

Sensing display device and touch detection method thereof

The present invention relates to a sensing display device and a touch detecting method thereof, and more particularly to a sensing display device using a photoelectric conversion element as a sensing element and a touch detecting method thereof.

Solar energy is a clean, non-polluting and inexhaustible source of energy. It has been the focus of attention in addressing the current pollution and shortages facing petrochemical energy. Since solar cells can directly convert solar energy into electrical energy, the development of solar cells has become an important application in solar energy technology.

In addition, in recent years, in order to improve the operational convenience of the electronic device, the touch panel gradually replaces the input device such as a keyboard or a mouse as an input interface of the electronic device, and the configuration of the touch panel may affect the overall power consumption of the electronic device. the amount. Here, the electronic device can be configured with a solar cell to extend the use time of the electronic device, thereby reducing the influence of the configuration of the touch panel on the power. However, the arrangement of the touch panel and the solar cell in the electronic device can improve the convenience of operation and reduce the speed of power consumption, but relatively increases the hardware cost of the electronic device.

The invention provides a sensing display device comprising a photoelectric conversion module, a battery, a display unit, a control unit and a driving unit. Light The electrical conversion module has a plurality of sensing units arranged in an array for converting light energy into electrical energy. The battery is electrically coupled to the photoelectric conversion module for storing electrical energy in the battery and providing a voltage source to the sensing display device. The display unit is disposed on a photosensitive surface of the photoelectric conversion module and covers the photosensitive surface. The control unit is electrically connected to the sensing units for determining whether the sensing units are in a mask state according to a change in the amount of power flowing through the sensing units. The driving unit is electrically connected between the control unit and the display unit for driving the display unit.

The invention also provides a touch detection method suitable for the foregoing sensing display device. The touch detection method includes the following steps. The control unit determines whether the sensing units are in a mask state according to a quantity of power flowing through the sensing units. The control unit determines a touch point according to the sensing unit in the mask state and outputs a touch position. The display unit displays according to the corresponding touch position.

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

1 is a system diagram of a sensing display device in accordance with an embodiment of the present invention. Referring to FIG. 1 , in the embodiment, the display device 100 includes a photoelectric conversion module 110 , a battery 120 , a display unit 130 , a control unit 140 , and a driving unit 150 . The display unit 130 is a display panel. The photoelectric conversion module 110 has a plurality of sensing units SEU arranged in an array, and converts the light energy into the electric energy EG through the sensing units SEU. The electric energy EG may be provided by each of the sensing units SEU.

The battery 120 is electrically coupled to the photoelectric conversion module 110 to receive the electrical energy EG generated by the photoelectric conversion module 110, and stores the electrical energy EG in the battery 120, that is, the battery 120 is charged after receiving the electrical energy EG. Moreover, the battery 120 provides a voltage source VDD to the sensing display device 100 to drive components in the display device 100 (such as the control unit 140 and the driving unit 150).

The display unit 130 is disposed on a photosensitive surface 112 of the photoelectric conversion module 110 and covers the photosensitive surface 112. In the present embodiment, the display unit 130 includes a plurality of pixel units PXU, and the overall transmittance of the display unit 130 is substantially not less than 50%.

The control unit 140 is electrically connected to the sensing unit SEU and the voltage source VDD for determining whether the sensing units SEU are in a mask state according to the change in the amount of power flowing through the sensing units SEU. The change in the amount of electricity of the sensing units SEU may be substantially a voltage amount change or a current amount change. Moreover, when determining that at least one of the sensing units SEU is in a mask state, the control unit 140 determines at least one touch point according to the sensing unit SEU in the mask state, and correspondingly outputs at least one touch position PT.

The driving unit 150, the electrical connection control unit 140, the display unit 130 and the voltage source VDD receive the touch position PT from the control unit 140, and the driving unit 150 drives the display unit 130 to display according to the touch position PT. Further, if the touch position PT is corresponding to an icon, the driving unit 150 drives the display unit 130 to display a corresponding icon; When the control position PT is corresponding to an operation function, the driving unit 150 drives the display unit 130 to display a corresponding function prompt screen; if the touch position PT corresponds to an icon and an operation function, the driving unit 150 drives the display unit 130 to The corresponding icon and corresponding function providing screen are displayed simultaneously or sequentially.

In general, the brightness of indoor and outdoor lighting will be different (that is, the brightness of the sun and the lighting of the luminaire are different), for example, the illumination under the sun will be greater than 100,000 lumens (Lux), while the illumination of indoor lamps is about 500 lumens. According to the above, in a general state, it is judged whether the brightness of the sensing unit SEU is masked should be less than 500 lumens. Here, whether the brightness received by the sensing unit SEU is greater than 200 lumens is a detection point of whether it is masked (that is, in a mask state), but the embodiment of the present invention may select other brightness according to actual design requirements or an application environment. The detection point is not limited to this embodiment of the present invention. If the illumination brightness of the ambient light is lower than the sensitivity of the photoelectric conversion module 110, for example, 200 lumens, the light sensing operation cannot be performed, but the display unit 130 can still display by the voltage source VDD provided by the battery 120.

In terms of the output voltage of the sensing unit SEU, if the maximum voltage output by the sensing unit SEU after receiving the source of 200 lumens is about 5.8V, the voltage detection threshold can be set to be greater than 5.8V, but will be less than a set voltage. In other words, even if the output maximum voltage is greater than the set voltage, the output voltage value is judged to be the set voltage. According to the electrical energy EG provided by the sensing unit SEU, when the output voltage of the sensing unit SEU is less than or equal to the voltage detection threshold, it is determined that the sensing unit SEU is in a mask state; otherwise, in the sensing list When the output voltage of the element SEU is greater than the voltage detection threshold, it is determined that the sensing unit SEU is not in the mask state.

In terms of the output current of the sensing unit SEU, if the maximum current output by the sensing unit SEU after receiving the source of 200 lumens is about 0.3 mA, the current detection point can be set to be greater than 0.3 mA. According to the electric energy EG provided by the sensing unit SEU, when the output current of the sensing unit SEU is less than or equal to the current detection point, it is determined that the sensing unit SEU is in a mask state; otherwise, the output current of the sensing unit SEU is greater than the current detection. When measuring the point, it is judged that the sensing unit SEU is not in the mask state.

2 is a circuit diagram of the sensing unit of FIG. 1 according to an embodiment of the invention. Referring to FIG. 1 and FIG. 2, in the embodiment, each sensing unit SEUa includes a photoelectric conversion element (here, a solar cell SRC is taken as an example), a diode D1, and a switching element (here, a transistor T1) For example, the solar cell SRC may be a single crystal germanium solar cell, a polycrystalline germanium solar cell, an amorphous germanium solar cell, or a copper indium gallium selenide solar cell.

The solar cell SRC is electrically coupled between the control unit 140 and a ground voltage. The anode of the diode D1 is electrically connected to the solar cell SRC. The collector of the transistor T1 (corresponding to the first end of the switching element) is electrically connected to the cathode of the diode D1, and the base of the transistor T1 (corresponding to the control end of the switching element) is electrically connected to the anode of the diode D1. The emitter of the crystal T1 (corresponding to the second end of the switching element) is electrically connected to the battery 120.

According to the above, the output voltage VO of the solar cell SRC is the output voltage of the sensing unit SEUa, and the output current IO of the solar cell SRC is the output current of the sensing unit SEUa. When the output voltage VO is greater than or equal to the electricity When the threshold voltage of the crystal T1 is high, the transistor T1 is turned on to supply the output voltage VO of the solar cell SRC and the output current IO as the voltage energy EG of the sensing unit SEUa to the battery 120, so that the battery 120 utilizes the output voltage of the solar cell SRC. The VO and the output current IO are charged; when the output voltage VO is lower than the threshold voltage of the transistor T1, the transistor T1 is not turned on, so the output voltage VO and the output current IO of the solar cell SRC are not supplied to the battery 120.

FIG. 3 is a circuit diagram of the sensing unit of FIG. 1 according to another embodiment of the present invention. Referring to FIG. 1 , FIG. 2 and FIG. 3 , in the present embodiment, the circuit structure of the sensing unit SEUb is substantially the same as the sensing unit SEUa, except that the sensing unit SEUb includes a plurality of solar cells SRC1 S SRC4, and The solar cells SRC1 to SRC4 are arranged in a matrix form by series or parallel connection. The electrical connection manner of the solar cells SRC1 S SRC4 is used for explanation, and the electrical connection manner of the plurality of solar cells (ie, the plurality of photoelectric conversion elements) in the embodiment of the present invention may be determined according to circuit design, and the present invention is implemented. The example is not limited to this.

According to the above, a touch detection method can be integrated, which is suitable for the sensing display device of the above embodiment. 4 is a flow chart of a touch detection method of a sensing display device according to an embodiment of the invention. Referring to FIG. 4, in the embodiment, the photoelectric conversion module converts light energy into electrical energy and stores it in a battery (step S410), and the battery provides power required to sense the display device (step S420). Next, the control unit determines whether the sensing units are in a mask state according to the amount of power flowing through the sensing units of the photoelectric conversion module (step S430). When the sensing unit is in the mask state, that is, step S430 If the determination result is “Yes”, the control unit determines a touch point according to the sensing unit in the mask state and outputs a touch position (step S440), and the display unit displays according to the corresponding touch position (step S450). ).

Since the electric energy storage and the mask judgment are continued, after the execution of step S450, the process returns to step S410. Moreover, when the sensing unit is not in the mask state, that is, the determination result in step S430 is "NO", the display of the display unit does not need to be changed, so the process returns directly to step S410. In step S430, the control unit may determine whether the sensing units are in a mask state according to whether the power of the sensing units is less than or equal to the critical power. That is, when the power of the sensing unit is less than or equal to the critical power, it is determined that the sensing unit is in a mask state; when the power of the sensing unit is greater than the critical power, it is determined that the sensing unit is not in a mask state.

In an embodiment of the invention, the power of the sensing units may be a voltage quantity, and the critical power quantity is correspondingly a threshold voltage quantity (such as the voltage detection threshold value described above); or, the power of the sensing units The amount of current may be the amount of current, and the critical amount of power is correspondingly a critical current amount (such as the above-mentioned current detection point. The order of the above steps is used for explanation, and the embodiment of the present invention is not limited thereto, and the above steps are For details, refer to the embodiment of FIG. 1 to FIG. 4, and details are not described herein again.

In summary, the sensing display device and the touch detection method thereof according to the embodiment of the present invention determine whether the touch position is determined by whether the photoelectric conversion element is shielded by light, so that the sensing display device only needs to be configured with the photoelectric conversion module. The utility model has the functions of simultaneously detecting and converting light energy into electric energy, thereby reducing the hardware cost of the sensing display device. And, the display unit can correspond to the touch position Display.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100‧‧‧Sensing display device

110‧‧‧ photoelectric conversion module

112‧‧‧Photosensitive surface

120‧‧‧Battery

130‧‧‧Display unit

140‧‧‧Control unit

150‧‧‧ drive unit

D1‧‧‧ diode

EG‧‧‧electric energy

IO‧‧‧ output current

PT‧‧‧ touch location

PXU‧‧‧ pixel unit

SEU, SEUa, SEUb‧‧‧ sensing unit

SRC, SRC1~SRC4‧‧‧ solar cells

T1‧‧‧O crystal

VDD‧‧‧voltage source

VO‧‧‧ output voltage

S410, S420, S430, S440‧‧ steps

1 is a system diagram of a sensing display device in accordance with an embodiment of the present invention.

2 is a circuit diagram of the sensing unit of FIG. 1 according to an embodiment of the invention.

FIG. 3 is a circuit diagram of the sensing unit of FIG. 1 according to another embodiment of the present invention.

4 is a flow chart of a touch detection method of a sensing display device according to an embodiment of the invention.

100‧‧‧Sensing display device

110‧‧‧ photoelectric conversion module

112‧‧‧Photosensitive surface

120‧‧‧Battery

130‧‧‧Display unit

140‧‧‧Control unit

150‧‧‧ drive unit

PT‧‧‧ touch location

PXU‧‧‧ pixel unit

SEU‧‧‧Sensor unit

VDD‧‧‧voltage source

Claims (9)

A sensing display device includes: a photoelectric conversion module having a plurality of sensing units arranged in an array for converting light energy into electrical energy; a display unit disposed on a photosensitive surface of the photoelectric conversion module, and Covering the photosensitive surface; a control unit electrically connecting the sensing units for determining whether the sensing units are in a mask state according to a change in the amount of power flowing through the sensing units; a unit electrically connected between the control unit and the display unit; and a battery electrically coupled to the photoelectric conversion module for storing the electrical energy and providing a voltage source to the control unit and the driving unit; Each of the sensing units includes: at least one photoelectric conversion element electrically coupled to the control unit; a diode, the anode of the diode is electrically connected to the at least one photoelectric conversion element; and a switching element a first end, a second end, and a control end, the first end is electrically connected to the cathode of the diode, the second end is electrically connected to the battery, and the control end is electrically connected to the diode Anode The sensing display device of claim 1, wherein when the number of the at least one photoelectric conversion element is substantially plural, the photoelectric conversion elements are arranged in a matrix form by series or parallel connection. The sensing display device of claim 1, wherein The at least one photoelectric conversion element is a single crystal germanium solar cell, a polycrystalline germanium solar cell, an amorphous germanium solar cell or a copper indium gallium selenide solar cell. The sensing display device of claim 1, wherein the display unit comprises a plurality of pixel units, wherein the light transmittance of the display unit is substantially not less than 50%. The sensing display device of claim 1, wherein the change in the amount of electricity of the sensing units is substantially a voltage amount change or a current amount change. A touch detection method for a sensing display device according to claim 1 , wherein the touch detection method comprises: the control unit determining the senses according to a power flowing through the sensing units Whether the measuring unit is in a mask state; the control unit determines a touch point according to the sensing unit in the mask state and outputs a touch position; and the display unit displays according to the corresponding touch position. The touch detection method of the sensing display device of claim 6, further comprising: determining that the sensing unit is in the mask when the amount of power of each of the sensing units is less than or equal to a critical amount of power status. The touch detection method of the sensing display device according to the sixth aspect of the invention, wherein the power of each of the sensing units is substantially a voltage difference or a current amount. The touch of the sensing display device as described in claim 6 of the patent application scope The control detection method further includes: the photoelectric conversion module converts light energy into electrical energy and stores the battery; and the battery provides the electrical energy required for the sensing display device.