CN110647251A - Light emitting diode device with touch sensing function - Google Patents
Light emitting diode device with touch sensing function Download PDFInfo
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- CN110647251A CN110647251A CN201810585110.7A CN201810585110A CN110647251A CN 110647251 A CN110647251 A CN 110647251A CN 201810585110 A CN201810585110 A CN 201810585110A CN 110647251 A CN110647251 A CN 110647251A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Computer Hardware Design (AREA)
- Position Input By Displaying (AREA)
- Electronic Switches (AREA)
Abstract
The invention relates to a light emitting diode device with touch sensing function, which comprises: at least one display unit and a micro control unit. The display unit includes a light emitting diode having an anode and a cathode; an anode conductive plate connected to the anode of the LED; and a cathode conductive sheet connected to the cathode of the LED; the anode conducting strip and the cathode conducting strip are arranged as follows: in a display period, the LED is turned on to emit light; and during a touch control period, the light emitting diode is not conducted and does not emit light, and is suitable for sensing a charge of a finger to generate a sensing signal; the micro-control unit is connected to the anode conducting strip and the cathode conducting strip and is configured to: connecting the anode conducting strip and the cathode conducting strip to a display circuit during the display period; and connecting the anode conductive sheet and the cathode conductive sheet to a touch circuit during the touch.
Description
Technical Field
The present invention relates to a touch display device, and more particularly, to a light emitting diode device with touch sensing function.
Background
The light emitting diode is an electroluminescent device for illumination and display. At present, it is also desirable to combine the touch mechanism with the light emitting diode display device to form a touch display device.
FIG. 1 shows a conventional touch display device 7, in which the touch device is a photodiode 71. When a finger touches the photodiode 71, the finger will shield the light above the photodiode 71, so that the photocurrent of the photodiode 71 will change, and the touch event can be determined by the photocurrent change. The conventional touch display device 7 has at least one disadvantage that it is easily affected by ambient light, for example, it cannot be used normally in a dark room.
FIG. 2 shows another conventional touch display device 8, in which the light emitting element is a light emitting diode 81, and the touch element is a dedicated sensing electrode 82 disposed around the light emitting diode 81 and independent (electrically insulated) from the light emitting diode 81. Such a conventional touch display device 8 has at least three disadvantages: first, the dedicated sensing electrode 82 is an additional element, which requires an additional element process to manufacture it; second, in order to connect the dedicated sensing electrode 82 to a control chip, a plurality of additional wirings are required, and an additional wiring process is required to manufacture them; third, the dedicated sensing electrode 82 and the additional wirings have adverse electrical or thermal effects on the light emitting diode 81.
Therefore, an innovative light emitting diode touch display device is needed to solve the above-mentioned drawbacks of the prior art.
Disclosure of Invention
In view of the above, the present invention provides a light emitting diode device with touch sensing function, comprising: at least one display unit and a micro control unit. The display unit includes a light emitting diode having an anode and a cathode; an anode conductive plate connected to the anode of the LED; and a cathode conductive sheet connected to the cathode of the LED; the anode conducting strip and the cathode conducting strip are arranged as follows: in a display period, the LED is turned on to emit light; and during a touch control period, the light emitting diode is not conducted and does not emit light, and is suitable for sensing a charge of a finger to generate a sensing signal; the micro-control unit is connected to the anode conducting strip and the cathode conducting strip and is configured to: connecting the anode conducting strip and the cathode conducting strip to a display circuit during the display period; and connecting the anode conductive sheet and the cathode conductive sheet to a touch circuit during the touch.
Further, in the led device with touch sensing function, the display period and the touch period are alternately generated for the at least one display unit.
In other words, the present invention employs a time-sharing switching (time-sharing switch) mechanism for the anode conductive sheet and the cathode conductive sheet.
Further, in the light emitting diode device with touch sensing function, there is no independent dedicated sensing electrode except that the anode conductive sheet and the cathode conductive sheet are used for transmitting the sensing signal during the touch.
Further, in the led device with touch sensing function, either the anode conductive sheet or the cathode conductive sheet is used as a sensing electrode, or both are used as sensing electrodes.
Further, in the led device with touch sensing function, the surface area of the cathode conductive sheet is larger than that of the anode conductive sheet, so that the cathode conductive sheet is suitable for being used as a sensing electrode.
Further, in the light emitting diode device with touch sensing function, a plurality of switches are arranged between the micro control unit and the anode conductive sheet and the cathode conductive sheet to connect the anode conductive sheet and the cathode conductive sheet to the display circuit or the touch circuit.
Further, in the led device with touch sensing function, during the touch sensing period, the mcu makes the anode conductive sheet and the cathode conductive sheet short-circuited to have an equal voltage, so as to be suitable for performing self-capacitance (self-capacitance) touch sensing. In particular, the equal voltage is derived from the sensing signal, and the LED does not emit light when the anode conductive sheet and the cathode conductive sheet transmit the equal voltage of the sensing signal. More particularly, the mcu is short-circuited by connecting the anode conductive sheet and the cathode conductive sheet together in the touch circuit.
Further, in the led device with touch sensing function, during the touch period, the mcu enables the cathode conductive sheet to emit a touch emitting signal, and the anode conductive sheet receives a touch receiving signal, so as to be suitable for performing a mutual-capacitance (mutual-capacitance) touch sensing. In particular, a difference between the touch transmitting signal and the touch receiving signal is proportional to the charge of the finger. More particularly, the touch emitting signal is a high voltage and the touch receiving signal is a low voltage, so that the light emitting diode is reversed during the touch without emitting light.
Further, in the led device with touch sensing function, the display unit is a dual in-line package (DIP) structure or an adhesive Surface Mount Device (SMD) structure.
Further, the light emitting diode device with the touch sensing function comprises a plurality of display units, and the display units sequentially enter respective touch periods.
Further, the light emitting diode device with touch sensing function comprises a plurality of display units, but only specific display units of the plurality of display units enter respective touch periods in sequence. In particular, the plurality of display units are divided into a plurality of groups; and the micro-control unit is configured to: determining that the sensing signal is from a specific group of the plurality of groups; for the specific group, the sensing signal is judged to be from a specific display unit of the specific group.
Furthermore, the light emitting diode device with touch sensing function comprises a plurality of display units which are arranged in an array.
Therefore, in the present invention, there is no independent dedicated sensing electrode except that the anode conductive sheet and the cathode conductive sheet are used to transfer the sensing signal during the touch. Therefore, no additional sensing electrode and its manufacturing process are needed, no additional sensing wires and their manufacturing process are needed, and no adverse electrical or thermal influence is generated on the LED due to the existence of the additional elements.
In addition, in view of the influence of the anode conductive sheet and the cathode conductive sheet as the sensing electrodes on the LED, the present invention designs a short circuit connection manner of the anode conductive sheet and the cathode conductive sheet and a reverse pressure application manner to prevent the LED from generating unexpected light during the sensing period.
Drawings
Fig. 1 shows a conventional touch display device.
Fig. 2 shows another conventional touch display device.
FIG. 3 is a block diagram of a light emitting diode device with touch sensing function according to a first embodiment of the present invention.
Fig. 4 shows a display unit of a DIP structure.
FIG. 5 shows a display unit of an SMD structure.
Fig. 6 shows a timing diagram in which the display period and the touch period alternate.
FIG. 7 is a schematic diagram of a light emitting diode device with touch sensing function according to a second embodiment of the present invention.
Fig. 8 and 9 are schematic diagrams illustrating a light emitting diode device with touch sensing function according to a third embodiment of the invention.
FIG. 10 shows a light emitting diode device with touch sensing function according to a fourth embodiment of the present invention.
Fig. 11 shows a timing diagram of a plurality of display units sequentially entering respective touch periods.
Fig. 12 and 13 show a light emitting diode device with touch sensing function according to a fifth embodiment of the invention.
FIG. 14 shows a light emitting diode device with touch sensing function according to a sixth embodiment of the present invention.
Description of reference numerals:
1. 2, 3, 4, 5, 6 light emitting diode device with touch sensing function
10. 10-1, 10-2, 10-3 display unit
10 specific display unit
11 groups of
11 specific group
100 light emitting diode
101 anode
102 cathode
110 anode conducting strip
120 cathode conducting strip
20 micro control unit
210 switch
30 display circuit
40 touch control circuit
IO1 Anode node
IO2 cathode node
Duration of PD display
During PT touch
RX touch control receiving signal
TX touch control emission signal
VH high voltage
VL low voltage.
Detailed Description
The following description will provide various embodiments of the present invention. It is to be understood that these examples are not intended to be limiting. Features of various embodiments of the invention may be modified, replaced, combined, separated, and designed to be applied to other embodiments.
First embodiment
Fig. 3 shows a block diagram of a light emitting diode device 1 with touch sensing function according to a first embodiment of the invention.
The light emitting diode device 1 with touch sensing function includes at least a display unit 10 and a Micro Control Unit (MCU) 20. In one example, the display unit 10 may be a dual in-line package (DIP) led structure, as shown in fig. 4. In another example, the display unit 10 can be a Surface Mount Device (SMD) LED structure, as shown in FIG. 5. Of course, other forms of display unit are possible.
Referring to fig. 3, 4 and 5, the display unit 10 includes: a light emitting diode 100 including an anode 101 and a cathode 102; an anode conductive sheet 110 connected to the anode 101 of the LED 100; and a cathode conductive sheet 120 connected to the cathode 102 of the LED 100.
The anode conductive sheet 110 and the cathode conductive sheet 120 are configured as follows: in a display period PD, the LED 100 is turned on to emit light; during a touch period PT, the LED 100 is turned off and does not emit light, and is adapted to sense a charge of a finger to generate a sensing signal.
In particular, the present invention senses a charge of a finger, rather than light.
In addition, for the display unit 10 itself, the display period PD and the touch period PT occur alternately, as shown in the timing chart of fig. 6. In other words, the present invention employs a time-sharing switch (time-sharing switch) mechanism for the anode conductive sheet 110 and the cathode conductive sheet 120. The image switching frequency of the pure display device is at least more than 60Hz, so as to avoid the perception of human eyes. The invention is further divided into the display period PD and the touch period PT, so the time-sharing switching frequency of the invention is at least more than 120Hz to avoid the perception of human eyes; preferably 120Hz to 200Hz, to balance the visual and power saving effects; of course, switching frequencies greater than 200Hz may be used purely to avoid detection by the human eye.
It should be noted that an influence of the anode conductive sheet 110 and the cathode conductive sheet 120 as sensing electrodes on the LED 100 must be considered. Specifically, when the anode conductive sheet 110 and the cathode conductive sheet 120 serve as sensing electrodes to transmit the sensing signal during the touch sensing period PT, a voltage of the sensing signal may cause the led 100 to emit light unexpectedly, for example, emit light when the light emission is not needed, or emit light too bright or too dark. Therefore, the anode conductive sheet 110 and the cathode conductive sheet 120 must be set so that the light emitting diode 100 is not turned on and does not emit light during the touch sensing period PT. This arrangement is important.
Any one of the anode conductive sheet 110 or the cathode conductive sheet 120 can be selected as a sensing electrode, in other words, the other one is idle and not used. In the case of using only a single sensing electrode, since the cathodically conductive sheet 120 is designed to deliver a higher voltage, its size is designed to be larger than that of the anodically conductive sheet 110, so that its surface area is also larger than that of the anodically conductive sheet 110, as shown in fig. 4, making the cathodically conductive sheet 120 more suitable as a sensing electrode (the anodically conductive sheet 110 delivers a high voltage during display, and the cathodically conductive sheet 120 delivers a high voltage during touch, the present invention is considered for touch purposes). It should be noted that in the case of using only a single sensing electrode, a self-capacitance sensing method is required.
Preferably, the anode conductive sheet 110 and the cathode conductive sheet 120 are selected to be used as sensing electrodes, and they can be electrically connected to each other to adopt a self-capacitance sensing method or electrically independent to each other to adopt a mutual capacitance sensing method. These sensing modes will be further explained in subsequent paragraphs.
The mcu 20 is connected to the anode conductive sheet 110 and the cathode conductive sheet 120 through an anode node IO1 and a cathode node IO2, respectively, and is configured to: connecting the anode conductive sheet 110 and the cathode conductive sheet 120 to a display circuit 30 during the display period PD; and connects the anode conductive sheet 110 and the cathode conductive sheet 120 to a touch circuit 40 during the touch period PT. The display circuit 30 is used for lighting the at least one display unit 10, typically a matrix of display units, in the display period PD to display an image. The touch circuit 40 is used to perform a touch sensing operation during the touch period PT using the anode conductive sheet 110 or the cathode conductive sheet 120, or both (according to a predetermined design).
Specifically, there are switches 210 between the mcu 20 and the anode conductive sheet 110 and the cathode conductive sheet 120 to connect the anode conductive sheet 110 and the cathode conductive sheet 120 to the display circuit 30 or the touch circuit 40.
As an example, the operation flow of the micro control unit 20 is: first, the display light emission of the display unit 10 is controlled; then, the display unit 10 is switched from being connected to the display circuit 30 to being connected to the touch circuit 40 (at this time, the light emitting diode 100 is floating to the display circuit 30); then, controlling the touch sensing of the display unit 10; then, judging a touch sensing result; and then returns to control the display light emission of the display unit 10, thus forming a cycle.
It can be seen that the anode conductive sheet 110 and the cathode conductive sheet 120 of the present invention serve as both the electrode of the light emitting diode 100 and the sensing electrode, and are switched therebetween by a time-sharing switching mechanism.
Therefore, in the present invention, there is no separate dedicated sensing electrode except that the anode conductive sheet 110 and the cathode conductive sheet 120 are used to transfer the sensing signal during the touch sensing period PT. Thus, no additional sensing electrodes and their fabrication processes are required, no additional sensing wires and their fabrication processes are required, and no adverse electrical or thermal effects are caused to the LED 100 by the presence of the additional elements.
Second embodiment
FIG. 7 is a diagram of a light emitting diode device 2 with touch sensing function according to a second embodiment of the present invention, which is suitable for performing a self-capacitance touch sensing.
The self-capacitance touch sensing refers to sensing whether a touch event occurs in a minimum sensing unit by using only a single sensing electrode, and transmitting and receiving a sensing signal are performed by the sensing electrode (of course, if there are a plurality of minimum sensing units, the minimum sensing units are respectively matched with the single sensing electrode). By comparing a difference value of the sensing signal back and forth, whether a touch event occurs can be judged.
The case of using only the anode conductive sheet 110 or only the cathode conductive sheet 120 will not be described in detail.
In a specific example of this embodiment, during the touch sensing period PT, the mcu 20 makes the anode conductive sheet 110 and the cathode conductive sheet 120 short-circuited to have an equal voltage suitable for performing a self-capacitance touch sensing. Specifically, the equal voltage is derived from the sensing signal, and the led 100 does not emit light when the anode conducting strip 110 and the cathode conducting strip 120 transmit the sensing signal of the equal voltage.
The short circuit occurs by the mcu 20 connecting the anode conductive sheet 110 and the cathode conductive sheet 120 together in the touch circuit 40. The connection may be realized by a plurality of switches (e.g., a logic circuit composed of transistors).
It is noted that, here, the equal voltage may be a non-zero voltage (non-ground voltage) due to the passing of the sensing signal. A distinguishing feature of the present invention is also apparent because an anode and a cathode of a general purpose light emitting diode used purely for light emission are not shorted and are not at a non-zero voltage (non-ground voltage) under a normal operation. Only if the anode conductive sheet 110 and the cathode conductive sheet 120 are used for both light emission and sensing according to the present invention, it is necessary to short-circuit both during the sensing, combining them into a sensing electrode.
Another point to be noted is that the short circuit has two advantages besides providing self-capacitance touch sensing: first, the anode conductive sheet 110 and the cathode conductive sheet 120 are combined by short circuit, which provides a larger sensing area. It is particularly noted that the background art does not warrant joining two separate conductive strips by a short circuit. Second, since the anode conductive sheet 110 and the cathode conductive sheet 120 have the equal voltage by short circuit, the light emitting diode 100 does not generate unexpected light emission because there is no voltage difference between the anode and the cathode.
Third embodiment
Fig. 8 is a schematic diagram of a light emitting diode device 3 with touch sensing function according to a third embodiment of the present invention, which is suitable for performing a mutual capacitance touch sensing.
So-called mutual capacitance touch sensing, in the present invention, a touch transmitting electrode (i.e., the cathode conductive sheet 120) is used to transmit a touch transmitting signal TX, and a touch receiving electrode (i.e., the anode conductive sheet 110) is used to receive a touch receiving signal RX. If a finger approaches the touch transmitting electrode and the touch receiving electrode, the charge of the finger will block or weaken the touch transmitting signal TX emitted by the touch transmitting electrode, as shown in fig. 9, and a part of the electric force line between the touch transmitting electrode and the touch receiving electrode is blocked by the finger. Then, the touch receiving electrode receives the blocked or attenuated touch transmitting signal TX to form the touch receiving signal RX. By comparing a difference between the touch transmitting signal TX and the touch receiving signal RX, it can be determined whether a touch event occurs. In other words, a difference between the touch transmitting signal TX and the touch receiving signal RX is proportional to the charge of a finger.
According to the present invention, during the touch period PT, the mcu 20 controls the cathode conductive sheet 120 to emit a touch transmitting signal TX and the anode conductive sheet 110 to receive a touch receiving signal RX. Preferably, the touch transmitting signal TX is a high voltage VH, and the touch receiving signal RX is a low voltage VL, so that the led 100 is reversed during the touch period PT without emitting light.
As described above, since the anode conductive sheet 110 and the cathode conductive sheet 120 of the present invention are used as both the electrode and the sensing electrode of the led 100, an influence of the anode conductive sheet 110 and the cathode conductive sheet 120 as the sensing electrode on the led 100 must be considered to prevent the led 100 from emitting light unexpectedly. Therefore, an undesired light emission of the LED 100 can be avoided by the reverse voltage generated by the reverse connection to the LED 100.
Fourth embodiment
FIG. 10 shows a fourth embodiment of a light emitting diode device 4 with touch sensing function (the display circuit 30 exists but is not shown in FIG. 10) including a plurality of display units 10 (e.g., 10-1, 10-2, 10-3 …), each display unit 10 having the same structure as the display unit 10 of the first embodiment, and the display units 10 sequentially enter into respective touch periods PT. Since touch sensing requires sequentially scanning each minimum sensing unit to determine a position of a touch event, the timing diagram of the display units 10 sequentially entering the respective touch periods PT is shown in fig. 11.
Fifth embodiment
Fig. 12 and 13 show a light emitting diode device 5 with touch sensing function according to a fifth embodiment of the present invention (a display circuit 30 exists, but is not shown in fig. 12 and 13), which includes a plurality of display units 10, but only certain display units 10 of the plurality of display units 10 enter respective touch periods PT sequentially.
Specifically, the plurality of display units 10 are divided into a plurality of groups 11; and the mcu 20 is configured to: determining that the sensing signal is from a specific group 11 of the plurality of groups 11; for the specific group 11, it is determined that the sensing signal is from a specific display cell 10 of the specific group 11. The broken lines of fig. 12 and 13 show a judgment path according to the above configuration. Fig. 12 and 13 respectively divide the eight display units 10 into different number of groups, specifically, fig. 12 divides the eight display units 10 into two groups, and fig. 13 divides the eight display units 10 into four groups, although other grouping methods are possible.
In other words, except for the specific group 11, a touch scan is not required to be performed on the other groups 11, so as to save time and power.
Sixth embodiment
Fig. 14 shows a light emitting diode device 6 with touch sensing function according to a sixth embodiment of the present invention, which includes a plurality of display units 10, the display units 10 are arranged in an array, wherein the structure and operation of each display unit 10 refer to the foregoing embodiments.
In summary, in the present invention, there is no independent dedicated sensing electrode except that the anode conductive sheet and the cathode conductive sheet are used for transmitting the sensing signal during the touch sensing. Therefore, no additional sensing electrode and its manufacturing process are needed, no additional sensing wires and their manufacturing process are needed, and no adverse electrical or thermal influence is generated on the light emitting diode due to the additional elements.
In addition, in view of the influence of the anode conductive sheet and the cathode conductive sheet as the sensing electrodes on the LED, the present invention designs a short circuit connection manner of the anode conductive sheet and the cathode conductive sheet and a reverse pressure application manner to prevent the LED from generating unexpected light during the sensing period.
Although the present invention has been described by the above embodiments, it is understood that many modifications and variations are possible in light of the spirit of the invention and the scope of the claims appended hereto.
Claims (17)
1. A light emitting diode device with touch sensing function comprises:
at least one display unit, which includes:
a light emitting diode having an anode and a cathode;
an anode conductive plate connected to the anode of the LED; and
a cathode conductive sheet connected to the cathode of the LED;
wherein, the anode conducting strip and the cathode conducting strip are arranged as follows:
in a display period, the LED is turned on to emit light; and is
During a touch period, the LED is not conducted and does not emit light, and is suitable for sensing a charge of a finger to generate a sensing signal;
a micro-control unit connected to the anode conducting strip and the cathode conducting strip and configured to:
connecting the anode conducting strip and the cathode conducting strip to a display circuit during the display period; and is
During the touch, the anode conductive sheet and the cathode conductive sheet are connected to a touch circuit.
2. The light emitting diode device with touch sensing function as claimed in claim 1, wherein the display period and the touch period are alternately generated for the at least one display unit itself.
3. The light emitting diode device with touch sensing function as claimed in claim 1, wherein there is no independent dedicated sensing electrode except for the anode conductive sheet and the cathode conductive sheet for transmitting the sensing signal during the touch.
4. The light emitting diode device with touch sensing function as claimed in claim 1, wherein either the anode conductive sheet or the cathode conductive sheet is used as a sensing electrode, or both are used as sensing electrodes.
5. The touch-sensing enabled light emitting diode device of claim 1, wherein the surface area of the cathode conductive sheet is larger than the surface area of the anode conductive sheet, such that the cathode conductive sheet is suitable for being used as a sensing electrode.
6. The light emitting diode device with touch sensing function as claimed in claim 1, wherein a plurality of switches are provided between the micro control unit and the anode and cathode conductive sheets for connecting the anode and cathode conductive sheets to the display circuit or the touch circuit.
7. The light emitting diode device with touch sensing function as claimed in claim 1, wherein during the touch sensing period, the MCU makes the anode conductive sheet and the cathode conductive sheet short-circuited to have an equal voltage suitable for performing a self-capacitance touch sensing.
8. The light emitting diode device with touch sensing function as claimed in claim 7, wherein the equal voltage is derived from the sensing signal, and the light emitting diode does not emit light when the anode conductive sheet and the cathode conductive sheet transmit the sensing signal of the equal voltage.
9. The light emitting diode device with touch sensing function as claimed in claim 7, wherein the MCU connects the anode conductive sheet and the cathode conductive sheet together in the touch circuit to generate a short circuit.
10. The light emitting diode device with touch sensing function as claimed in claim 1, wherein during the touch sensing, the MCU enables the cathode conductive sheet to emit a touch emitting signal, and the anode conductive sheet to receive a touch receiving signal, so as to be suitable for performing a mutual capacitance touch sensing.
11. The light emitting diode device with touch sensing capability as claimed in claim 10, wherein a difference between the touch emitting signal and the touch receiving signal is proportional to the charge of the finger.
12. The light emitting diode device with touch sensing function as claimed in claim 10, wherein the touch emitting signal is a high voltage and the touch receiving signal is a low voltage, such that the light emitting diode is reversed during the touch without emitting light.
13. The light emitting diode device with touch sensing function as claimed in claim 1, wherein the display unit is a dual in-line package structure or an adhesive structure.
14. The light emitting diode device with touch sensing function as claimed in claim 1, wherein the at least one display unit comprises a plurality of display units, and the plurality of display units enter respective touch periods sequentially.
15. The light emitting diode device with touch sensing function as claimed in claim 1, wherein the at least one display unit comprises a plurality of display units, but only specific ones of the plurality of display units enter respective touch periods sequentially.
16. The light emitting diode device with touch sensing function as claimed in claim 15, wherein the display units are divided into a plurality of groups; and is
The micro-control unit is configured to:
determining that the sensing signal is from a specific group of the plurality of groups;
for the specific group, the sensing signal is judged to be from a specific display unit of the specific group.
17. The light emitting diode device with touch sensing function as claimed in claim 1, wherein the at least one display unit comprises a plurality of display units arranged in an array.
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| CN201810585110.7A CN110647251B (en) | 2018-06-08 | 2018-06-08 | Light emitting diode device with touch sensing function |
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| CN201810585110.7A CN110647251B (en) | 2018-06-08 | 2018-06-08 | Light emitting diode device with touch sensing function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111199695A (en) * | 2020-02-27 | 2020-05-26 | 京东方科技集团股份有限公司 | Display panel, driving method thereof and display device |
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