CN114035700B - Touch display panel and electronic equipment - Google Patents
Touch display panel and electronic equipment Download PDFInfo
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- CN114035700B CN114035700B CN202110818728.5A CN202110818728A CN114035700B CN 114035700 B CN114035700 B CN 114035700B CN 202110818728 A CN202110818728 A CN 202110818728A CN 114035700 B CN114035700 B CN 114035700B
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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
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
Abstract
The invention relates to a touch display panel and electronic equipment, wherein a touch sensing transmitting unit and a touch sensing receiving unit are arranged in a gap between LED pixel units in the touch display panel, which is equivalent to embedding the touch panel function between the LED pixel units, and compared with the scheme of independently arranging the touch panel, the thickness of the touch display panel can be greatly reduced. Meanwhile, because the capacitive plate of the capacitor formed by the touch sensing transmitting unit and the touch sensing receiving unit is perpendicular to the driving substrate, the touch sensing transmitting unit, the touch sensing receiving unit and the LED pixel unit are basically in the same horizontal plane, so that the thickness of the touch display panel can be further reduced, and the portability and the product competitiveness of an electronic product applying the touch display panel are improved.
Description
Technical Field
The present disclosure relates to electronic technology, and particularly to a touch display panel and an electronic device.
Background
Touch screens are the most common screens on current electronic devices, provide an input interface for a user while realizing a display function, and provide a simpler, more convenient and natural man-machine interaction mode compared with the traditional display screen. Currently, the mainstream touch screen includes OGS (One Glass Solution, integrated touch control) touch screen, oncell (touch panel function is set on the liquid crystal panel) touch screen and excel (touch panel function is embedded in the liquid crystal panel) touch screen, but with the improvement of the requirements of users on the thinning of electronic products, the thickness of these touch screens can not meet the requirements any more.
Therefore, how to reduce the thickness of the touch screen in the electronic device is a problem to be solved at present.
Disclosure of Invention
In view of the above-mentioned drawbacks of the related art, an object of the present application is to provide a touch display panel and an electronic device, which aim to solve the problem that the thickness of the touch screen does not meet the requirement.
A touch display panel, comprising:
a plurality of LED pixel units;
a plurality of touch sensing transmission units;
a plurality of touch sensing reception units; and
a driving substrate;
the LED pixel units, the touch sensing transmitting units and the touch sensing receiving units are all arranged on the same surface of the driving substrate, the LED pixel units, the touch sensing transmitting units and the touch sensing receiving units are respectively and electrically connected with a display driving circuit, a sensing input signal line and a sensing output signal line on the driving substrate, the touch sensing transmitting units and the touch sensing receiving units are positioned in gaps among the LED pixel units, adjacent touch sensing transmitting units and touch sensing receiving units form capacitors, and capacitance plates of the capacitors are perpendicular to the driving substrate.
In the touch display panel, the touch sensing transmitting unit and the touch sensing receiving unit are arranged in the gap between the LED pixel units, which is equivalent to embedding the touch panel function between the LED pixel units, and compared with the scheme of independently arranging the touch panel, the thickness of the touch display panel can be greatly reduced. Meanwhile, because the capacitive plate of the capacitor formed by the touch sensing transmitting unit and the touch sensing receiving unit is perpendicular to the driving substrate, the touch sensing transmitting unit, the touch sensing receiving unit and the LED pixel unit are basically in the same horizontal plane, so that the thickness of the touch display panel can be further reduced, and the portability and the product competitiveness of an electronic product applying the touch display panel are improved.
Optionally, the touch display panel further includes a display driving chip, and the display driving chip is configured to receive a control signal from the main control chip and control the LED pixel unit to work through the display driving circuit according to the control signal.
Optionally, the touch display panel further includes a touch control chip, and the touch control chip is configured to control the touch sensing transmitting unit to transmit an alternating current signal through the sensing input signal line, and is configured to receive the electric signal sensed by the touch sensing receiving unit through the sensing output signal line, and determine whether a touch event occurs at a position on the touch display panel corresponding to the touch sensing receiving unit according to the electric signal.
Optionally, the touch sensing transmitting units and the touch sensing receiving units are arranged together in an array, and the touch sensing transmitting units and the touch sensing receiving units are staggered in at least one of a row direction and a column direction of the array.
Optionally, the plurality of touch sensing emission units are arranged into at least two emission sensing units on the driving substrate, the plurality of touch sensing emission units form at least two receiving sensing units on the driving substrate, the emission sensing units are parallel to the receiving sensing units, and the emission sensing units and the receiving sensing units are staggered.
In the touch display panel, the touch sensing transmitting units and the touch sensing transmitting units are respectively arranged in the queue, and meanwhile, the transmitting sensing unit queues and the receiving sensing unit queues are arranged in a staggered manner, so that the touch sensing transmitting units and the touch sensing transmitting units are only arranged in a staggered manner in one direction, the sensing errors of the touch sensing transmitting units and the touch sensing transmitting units in the other direction can be reduced, and the touch positioning precision is improved.
Optionally, the touch display panel further includes a sealing layer, the sealing layer is parallel to the driving substrate, and the LED pixel unit, the touch sensing transmitting unit and the touch sensing receiving unit are located between the driving substrate and the sealing layer.
The LED pixel unit, the touch sensing transmitting unit and the touch sensing receiving unit are arranged on one side, far away from the driving substrate, of the touch display panel, and the LED pixel unit, the touch sensing transmitting unit and the touch sensing receiving unit can be protected by the aid of the sealing layer: because the sealing adhesive layer can play a role in fixing the device on one hand, on the other hand, external water vapor and dust can be prevented from entering, and the reliability of the device is improved.
Optionally, the sealant layer includes a plurality of light shielding units, a portion of the light shielding units are located opposite to the touch sensing transmitting unit, and another portion of the light shielding units are located opposite to the touch sensing receiving unit.
In the touch display panel, the shading unit is arranged at the position corresponding to the touch sensing transmitting unit and the position corresponding to the touch sensing receiving unit in the sealing layer, so that the problems that the touch sensing transmitting unit reflects light outside the touch sensing receiving unit and the LED pixel unit is affected, and the display effect of the touch display panel is improved.
Optionally, the sealant layer includes a plurality of transparent adhesive units, and the positions of the transparent adhesive units are opposite to the LED pixel units.
Optionally, the touch display panel further includes a retaining wall, the retaining wall and the LED pixel unit are located at the same side of the driving substrate, and the retaining wall is disposed along an edge of the driving substrate, and encloses the LED pixel unit, the touch sensing transmitting unit and the touch sensing receiving unit in the middle.
In the touch display panel, the retaining wall is arranged around the LED pixel unit, the touch sensing transmitting unit and the touch sensing receiving unit, so that external light can be prevented from entering the LED pixel unit, and the influence of the external light on the display effect of the touch display panel is avoided.
Based on the same inventive concept, the application further provides an electronic device, wherein the electronic device comprises a processor and any one of the touch display panels, and the processor is configured to be in communication connection with the LED pixel units through a display driving chip and a display driving circuit; the processor is also configured to be in communication connection with the touch sensing transmitting unit and the touch sensing receiving unit through the touch control chip, and the touch control chip is respectively in communication connection with the sensing input signal line and the sensing output signal line.
In the electronic device, the touch sensing transmitting unit and the touch sensing receiving unit are arranged in the gap between the LED pixel units, which is equivalent to embedding the touch panel function between the LED pixel units, and compared with the scheme of independently arranging the touch panel, the thickness of the touch display panel can be greatly reduced. Meanwhile, because the capacitive plate of the capacitor formed by the touch sensing transmitting unit and the touch sensing receiving unit is perpendicular to the driving substrate, the touch sensing transmitting unit, the touch sensing receiving unit and the LED pixel unit are basically in the same horizontal plane, so that the thickness of the touch display panel can be further reduced, and the portability and the product competitiveness of an electronic product applying the touch display panel are improved.
Drawings
Fig. 1a is a schematic structural diagram of an OGS touch screen according to the present invention;
FIG. 1b is a schematic view of an Oncell type touch screen according to the present invention;
fig. 1c is a schematic structural diagram of an excel touch screen according to the present invention;
FIG. 2 is a schematic cross-sectional view of a touch display panel according to an alternative embodiment of the invention;
FIG. 3a is a schematic diagram showing a comparison of waveforms transmitted by the touch sensing transmitting unit and waveforms received by the touch sensing receiving unit in the absence of touch according to an alternative embodiment of the present invention;
FIG. 3b is a schematic diagram showing a comparison of waveforms transmitted by the touch sensing transmitting unit and waveforms received by the touch sensing receiving unit when touched according to an alternative embodiment of the present invention;
FIG. 4 is a schematic diagram showing the equivalent capacitance of the touch sensing transmitting unit and the touch sensing receiving unit according to an alternative embodiment of the invention;
FIG. 5 is a schematic diagram of a location of a touch-sensitive cell in an array according to an alternative embodiment of the present invention;
FIG. 6 is a schematic diagram of a touch sensing unit and touch sensing units adjacent thereto according to an alternative embodiment of the invention;
FIG. 7a is a schematic diagram showing an arrangement of touch sensing units on a driving substrate according to an alternative embodiment of the present invention;
FIG. 7b is a schematic diagram showing another arrangement of touch sensing units on a driving substrate according to an alternative embodiment of the present invention;
FIG. 7c is a schematic diagram showing another arrangement of touch sensing units on a driving substrate according to an alternative embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a touch display panel according to an alternative embodiment of the invention;
FIG. 9a is a schematic cross-sectional view of a touch display panel according to an alternative embodiment of the invention;
FIG. 9b is a schematic view illustrating an arrangement of the retaining wall in the touch display panel of FIG. 9 a;
FIG. 10 is a schematic diagram of a hardware architecture of an electronic device according to an alternative embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of a touch display panel according to another embodiment of the invention;
FIG. 12 is a schematic diagram of a circuit structure of a touch display panel according to another alternative embodiment of the present invention;
fig. 13 is a schematic top view of the touch display panel in fig. 11.
Reference numerals illustrate:
10a-OGS touch screen; 10b-Oncell type touch screen; 10 c-excel type touch screen; 11-a liquid crystal panel; 111-a liquid crystal lower substrate; 112-a liquid crystal layer; 113-a liquid crystal upper substrate; 12-an adhesive layer; 13-a touch cover plate; 14-a touch layer; 15-a protective adhesive layer; 20-a touch display panel; 21-a drive substrate; 22-LED pixel units; 23-a touch-sensitive transmitting unit; a 24-touch-sensitive receiving unit; 25-a protective seal layer; 251-a light shielding unit; 252-transparent glue units; 26-retaining wall; 40-capacitance; 41-a first touch sensing unit; 42-a second touch sensing unit; 51-a first touch sensing unit; 52-a second touch sensing unit; 53-a third touch sensing unit; 54-a fourth touch sensing unit; 71-a transmitting induction unit team; 72-receiving a sensing unit team; 80-a touch display panel; 90-touch display panel; 1-an electronic device; a 101-processor; 102-a touch display panel; 1021-display driving circuit; 1022-sense input signal line; 1023-sense output signal line; 1024-display driver chip; 1025-touching the control chip; 110-a touch display panel; 1101-driving a substrate; 1102-a protective seal layer; 11021-a transparent adhesive unit; 11022-a light shielding unit; 1103-LED pixel cell; 1104-a touch-sensitive transmitting unit; 1105-a touch-sensitive receiving unit; 1106-display driver chip; 1107—a touch control chip; 1108-retaining wall.
Detailed Description
In order to facilitate an understanding of the present application, a more complete description of the present application will now be provided with reference to the relevant figures. Preferred embodiments of the present application are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Currently, more common touch screens include OGS type touch screens, oncell type touch screens, and Incell type touch screens, please refer to the schematic structural diagrams of the three touch screens shown in fig. 1a to 1 c:
as shown in fig. 1a, the OGS touch screen 10a forms an adhesive layer 12 on a liquid crystal panel 11 by an adhesive to adhere a touch cover plate 13 with a touch function, wherein the liquid crystal panel 11 includes a liquid crystal lower substrate 111, a liquid crystal layer 112, and a liquid crystal upper substrate 113, and the liquid crystal upper substrate 113 is actually a CF (Color Filter) substrate, and it is understood that although not shown in fig. 1a, the liquid crystal panel 11 may further include an upper polarizing plate, a lower polarizing plate, and other devices. The OGS touch screen 10a has the advantage of simple process, but has the more remarkable defects: the lower liquid crystal substrate 111 and the upper liquid crystal substrate 113 of the liquid crystal panel 11 include glass substrates, and the touch cover 13 needs to be provided with glass substrates, so that the OGS type touch screen 10a needs more glass substrates, and the whole touch screen product is thicker.
As shown in fig. 1b, the on cell type touch screen 10b etches the pattern of the touch layer 14 directly on the side of the liquid crystal upper substrate 113 of the liquid crystal panel 11 away from the liquid crystal layer 112 to form the touch layer 14, however, a protective adhesive layer 15 is required to be disposed on the side of the touch layer 14 away from the liquid crystal upper substrate 113 to protect the touch layer 14, so that the thickness of the touch screen product can be reduced to a certain extent even though the on cell type touch screen 10b is also used.
Referring to fig. 1c, the touch screen 10c includes a touch layer 14 directly formed inside a liquid crystal panel 11: the touch layer 14 is disposed between the upper liquid crystal substrate 113 and the liquid crystal layer 112, so that the upper liquid crystal substrate 113 can be directly used to protect the touch layer 14, and no additional protective adhesive layer is required, so that the product thickness can be further reduced. However, the yield of such touch screens is not high due to the limitations of the current production technology.
Based on this, it is desirable to provide a new touch display scheme, the details of which will be described in the following embodiments.
An alternative embodiment of the invention:
the present embodiment provides a touch display panel, please refer to a schematic cross-sectional structure of the touch display panel shown in fig. 2: the touch display panel 20 includes a driving substrate 21, a plurality of LED pixel units 22, and a plurality of touch sensing units, which are divided into two types, one type is a touch sensing transmitting unit 23 and the other type is a touch sensing receiving unit 24.
The LED pixel unit 22 is disposed on the driving substrate 21 and electrically connected to a display driving circuit (not shown in fig. 2) on the driving substrate 21, and the LED pixel unit 22 can convert an electrical signal into an optical signal under the driving of the display driving circuit, thereby realizing the display function of the touch display panel 20. It should be noted that the display driving circuit is disposed on the driving substrate 21, and the "up" word does not mean that the display driving circuit is necessarily located on the surface of the driving substrate 21, and does not mean that the display driving circuit is located on the upper portion of the driving substrate 21. The display driving circuit may be considered to be provided on the driving substrate 21 as long as the display driving circuit is in contact with the driving substrate 21, so in some examples the display driving circuit may be provided on the surface of the driving substrate 21, and in other examples the display driving circuit may be provided inside the driving substrate 21.
One or more LED chips may be included in each LED pixel unit 22, for example, if the touch display panel 20 only implements gray scale display, only one LED chip may be included in each LED pixel unit 22; if the touch display panel 20 needs to implement color display, at least the LED chips of the three primary colors of RGB should be included in the LED pixel unit 22, and in other examples of this embodiment, the LED pixel unit 22 may include LED chips that may emit light of other colors, for example, LED chips that may emit indigo light, LED chips that may emit yellow light, and so on, in addition to the LED chips of three colors of red, green, and blue. The LED chip in this embodiment includes, but is not limited to, micro-LEDs (Micro LEDs), mini-LEDs (Mini LEDs), or OLEDs (organic light-Emitting diodes), or the like. In addition, the structure of the LED chip is not limited in this embodiment, and the flip-chip LED chip, the front-mounted LED chip, or the LED chip having a vertical structure may be selected as required when the touch display panel 20 is manufactured.
The touch sensing unit is also disposed on the driving substrate 21, and the touch sensing transmitting unit 23, the touch sensing receiving unit 24 and the LED pixel units 22 are disposed on the same side of the driving substrate 21, and the touch sensing unit is disposed in the gap between the LED pixel units 22. On the driving substrate 21, there are further provided a sense input signal line (not shown in fig. 2) corresponding to the touch sense transmission unit 23, and a sense output signal line (not shown in fig. 2) corresponding to the touch sense reception unit 24: the touch sensing transmitting unit 23 is electrically connected with the sensing input signal line and externally transmits an electric signal under the excitation of the electric signal transmitted by the sensing input signal line; the touch sensing receiving unit 24 is electrically connected to the sensing output signal line, and the touch sensing receiving unit 24 is configured to receive the electrical signal and transmit the received electrical signal to the touch control chip through the sensing output signal line, so that the touch control chip determines whether a touch event occurs at a position on the touch display panel corresponding to the touch sensing receiving unit 24 based on the electrical signal.
In this embodiment, the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 that are adjacent to each other may form a capacitor, and since the capacitor itself has the characteristic of "on ac and dc resistance", when one touch sensing transmitting unit 23 and one touch sensing receiving unit 24 form a capacitor, the touch sensing receiving unit 24 may sense the ac signal transmitted by the touch sensing transmitting unit 23. When no touch event occurs at the position corresponding to the capacitance, the electrical signal received by the touch sensing receiving unit 24 is substantially the same as the electrical signal transmitted by the touch sensing transmitting unit 23, for example, please refer to fig. 3a, which shows a comparison of waveforms of the electrical signal transmitted by the touch sensing transmitting unit 23 and waveforms of the electrical signal received by the touch sensing receiving unit 24, in which fig. 3a, the abscissa indicates time and the ordinate indicates voltage value of the electrical signal. When a touch event occurs at a position corresponding to the capacitance, the electrical signal received by the touch sensing receiving unit 24 and the electrical signal transmitted by the corresponding touch sensing transmitting unit 23 are greatly different in soy sauce, for example, please refer to fig. 3b, which shows a schematic diagram of comparing the waveform of the electrical signal transmitted by the touch sensing transmitting unit 23 with the waveform of the electrical signal received by the touch sensing receiving unit 24 when the touch event occurs, wherein the period t1-t2 is the period when the touch event occurs.
It is to be understood that, because the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 operate in the form of capacitors, the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 forming one capacitor can be respectively equivalent to a capacitive plate, in this embodiment, the capacitive plates of the capacitors formed by the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 are disposed perpendicular to the driving substrate 21, which means that the touch sensing units are "adjacent left and right" on the driving substrate 21, rather than "adjacent up and down", and please refer to a schematic diagram of the capacitor 40 in which the first touch sensing unit 41 and the second touch sensing unit 42 are equivalent to the embodiment shown in fig. 4: the first touch sensing unit 41 is either one of the touch sensing transmitting unit 23 and the touch sensing receiving unit 24, and the second touch sensing unit 42 is the other. The first touch sensing unit 41 and the second touch sensing unit 42 are disposed on the same surface of the driving substrate 21 and are substantially in the same horizontal plane, except that the second touch sensing unit 42 is on the right side of the first touch sensing unit 41, and in the equivalent capacitor 40, the first touch sensing unit 41 is equivalent to one of the capacitive plates perpendicular to the driving substrate 21, and the second touch sensing unit 42 is equivalent to the other capacitive plate perpendicular to the driving substrate 21.
It will be appreciated that since the touch sensing units are disposed in the gaps between the LED pixel units 22, the touch sensing function is not only integrated on the display panel, but also embedded between the LED pixel units 22. In addition, since the capacitance plates of the capacitances formed by the adjacent touch sensing units are perpendicular to the driving substrate 21, the touch sensing units are disposed right and left, and the size of the touch sensing units can be made to be almost the same as that of the LED pixel units 22, if the layer structure formed by all the LED pixel units 22 on the driving substrate 21 is referred to as a "display layer", and the layer structure formed by all the sensing units on the driving substrate 21 is referred to as a "sensing layer", the sensing layer and the display layer are substantially in the same horizontal plane. In other words, in the thickness direction of the touch display panel 20, the touch sensing function is simply a space that has been occupied by the display function, and no additional space is basically required.
The touch display panel provided in some examples of this embodiment further includes a display driving chip, where the display driving chip is electrically connected to the display driving circuit, and is configured to receive a control signal from the processor, and control the LED pixel unit 22 to operate through the display driving circuit according to the control signal, so that the display layer displays an image.
The touch display panel provided in other examples further includes a touch control chip, where the touch control chip is electrically connected to the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 through the sensing input signal line and the sensing output signal line, respectively, so that the touch control chip can control the touch sensing transmitting unit 23 to transmit an ac signal through the sensing input signal line, receive an electrical signal sensed by the touch sensing receiving unit 24 through the sensing output signal line, and further determine whether a touch event occurs at a position corresponding to the touch sensing receiving unit according to the electrical signal received by the touch sensing receiving unit 24.
In still other examples, the touch display panel may have both a display driving chip and a touch control chip. Of course, if a touch display panel does not include a display driving chip or a touch control chip, the touch display panel can realize a corresponding display function or touch sensing function by externally connecting the display driving chip or the touch control chip.
The touch sensing units are generally arranged in an array on the driving substrate 21, that is, are regularly arranged in rows and columns, so that, except for the touch sensing units located at the edge of the array and the touch sensing units adjacent to the LED pixel units, the touch sensing units have four touch sensing units adjacent to them, for example, please refer to fig. 5, in which, in fig. 5, each touch sensing unit is arranged in a rectangular array. In the rectangular array, the first touch sensing unit 51 is positioned in the middle of the rectangle and is not adjacent to the LED pixel unit 22, and thus, there are four touch sensing units adjacent to the first touch sensing unit 51. The second touch sensing unit 52 is located at the vertex of the rectangle, and there are only two adjacent touch sensing units. The third touch sensing units 53 are located at the sides of the rectangle, and three touch sensing units are adjacent to the third touch sensing units. It will be appreciated that if one touch sensing unit is adjacent to the LED pixel unit 22, the number of touch sensing units adjacent to the threshold value is further reduced, for example, the fourth touch sensing unit 54 is adjacent to the LED pixel unit 22 although it is also located in the middle of the rectangle, and thus, there are only three touch sensing units adjacent to the fourth touch sensing unit 54.
It should be appreciated that if all adjacent touch sensing elements around a touch sensing element are of the same type as itself, e.g., are touch sensing emissive elements 23, then the touch sensing element cannot form a capacitance with the adjacent touch sensing element, which is effectively an inactive touch sensing element. Conversely, if only one of the touch sensing units adjacent to the one touch sensing unit is different from the one of the touch sensing unit, the one touch sensing unit is not an invalid touch sensing unit. For example, assuming that the touch sensing unit a is a touch sensing transmitting unit and four touch sensing units adjacent thereto are B, C, D, E, as shown in fig. 6, as long as one of the four touch sensing units is a touch sensing receiving unit, a capacitance may be formed with the touch sensing unit a, so that the touch sensing unit a has a role in sensing user input.
In some cases, the touch sensing reception units 24 adjacent to the same touch sensing transmission unit 23 may be more than one, and correspondingly, in some cases, the touch sensing transmission units 23 adjacent to the same touch sensing reception unit 24 may be more than one. For example, in the present embodiment, the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 may be disposed alternately in at least one of the row direction and the column direction of the array:
for example, in some examples, the touch sensing and transmitting units 23 and the touch sensing and receiving units 24 are staggered in both the row direction and the column direction of the array, as shown in fig. 7a, the touch sensing and transmitting units 23 and the touch sensing and receiving units 24 are staggered in each column, and the touch sensing and transmitting units 23 and the touch sensing and receiving units 24 are also staggered in each row.
In still other examples, the touch sensing units 23 and the touch sensing units 24 are staggered in only one direction of the array, for example, please refer to fig. 7b, the trigger sensing units 23 and the touch sensing units 24 on the driving substrate 21 are first arranged in a queue on the substrate, for example, each trigger sensing unit 23 is arranged into at least two emission sensing unit queues 71, and the emission sensing unit queues 71 are only formed by the trigger sensing units 23; each touch-sensitive receiving unit 24 is arranged in at least two receiving-sensitive unit groups 72, and the receiving-sensitive unit groups 72 are likewise formed only by the touch-sensitive receiving units 24. The emission sensing unit queues 71 and the receiving sensing unit queues 72 are parallel to each other, but the emission sensing unit queues 71 and the receiving sensing unit queues 72 are staggered, that is, one receiving sensing unit queue 72 is separated between the two emission sensing unit queues 71, and one emission sensing unit queue 71 is separated between the two receiving sensing unit queues 72. With this arrangement, the touch sensing transmission unit 23 and the touch sensing reception unit 24 can be made to be staggered only in the column direction. Of course, it will be understood by those skilled in the art that in other examples, the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 may be staggered only in the row direction.
When there is more than one touch sensing and receiving unit 24 adjacent to one touch sensing and transmitting unit 23, the touch sensing and transmitting unit 23 may constitute a capacitance with each of the adjacent touch sensing and receiving units 24. When there is more than one touch sensing and transmitting unit 24 adjacent to one touch sensing and receiving unit 24, the touch sensing and receiving unit 24 may also constitute a capacitance with each of these adjacent touch sensing and transmitting units 24.
It will be appreciated that if the touch sensing and transmitting units adjacent to one touch sensing and receiving unit include two or more, when the touch chip determines that a touch event has occurred based on the electrical signal received at the touch sensing and receiving unit, it is difficult to determine which capacitance corresponds to which touch event has occurred, so if the touch sensing and transmitting units 23 and the touch sensing and receiving units 24 are staggered in the row direction or the column direction of the array, although the touch sensitivity of the touch display panel is high, the touch positioning error will become large, resulting in low touch positioning accuracy. Although the touch range of the user is large relative to the area of the touch sensing unit, when a touch event occurs, it is almost impossible that only one touch sensing receiving unit 24 senses the touch, but such an error still has a certain influence on the determination of the touch range, so in some examples of the present embodiment, the touch sensing transmitting unit 23 and the touch sensing receiving unit 24 are not staggered in the row direction and the column direction of the array:
for example, as shown in fig. 7c, each touch sensing transmitting unit 23 is arranged into at least two transmitting sensing unit teams 71 on the driving substrate 21, each touch sensing receiving unit 24 is arranged into at least two receiving sensing unit teams 72 on the driving substrate 21, two receiving sensing unit teams 72 are spaced between each two transmitting sensing unit teams 71, and two transmitting sensing unit teams 71 are spaced between each two receiving sensing unit teams 72, so that the touch sensing transmitting units 23 and the touch sensing receiving units 24 are in one-to-one correspondence, thereby ensuring that the touch control chip can position and define a touch range according to the electric signals sensed by the touch sensing receiving units 24 after determining that a touch event occurs.
In some examples of the present embodiment, the touch display panel further includes a protective sealing layer, please refer to a schematic cross-sectional structure of a touch display panel shown in fig. 8: the touch display panel 80 includes a driving substrate 21, a plurality of LED pixel units 22, a touch sensing transmitting unit 23, and a touch sensing receiving unit 24, and a protective sealing layer 25, where the protective sealing layer 25 is parallel to the driving substrate 21, and the LED pixel units 22 and the touch sensing units are sandwiched therebetween to form a sandwich structure. The protective sealing layer 25 is mainly used for protecting the LED pixel unit 22 and the touch sensing unit on the driving substrate 21, and it is needless to say that the existence of the protective sealing layer 25 should not block the light emitted by the LED pixel unit 22 and should not affect the display function, so that the protective sealing layer 25 is transparent at a position at least corresponding to the LED pixel unit 22: in some examples of this embodiment, the positions of the protective sealing layer 25 corresponding to the LED pixel units 22 are hollowed out, so that light emitted from the LED pixel units 22 can be emitted from one side of the protective sealing layer 25 to the other side without any obstruction. In some examples of this embodiment, the protective sealing layer 25 is entirely a transparent ground structure, for example, the protective sealing layer 25 may be a glass substrate or a non-hollowed-out adhesive layer formed of transparent adhesive.
In order to avoid the influence of the reflection of light at the touch sensing unit, in some examples of the present embodiment, the light shielding unit 251 is disposed at a position corresponding to the touch sensing unit in the protective seal layer 25, and because there are a plurality of touch sensing units on the driving substrate 21, there are a plurality of light shielding units 251 in the protective seal layer 25, and a part of the plurality of light shielding units 251 is located opposite to the touch sensing transmitting unit 23, and another part is located opposite to the touch sensing receiving unit 24.
In some examples of the present embodiment, transparent adhesive units 252 are disposed at positions of the protective sealing layer 25 corresponding to the LED pixel units 22, and please continue to refer to fig. 8, because there are a plurality of LED pixel units 22 on the driving substrate 21, and thus, a plurality of transparent adhesive units 252 are also disposed in the protective sealing layer 25.
It will be appreciated that, in theory, the transparent glue unit 252 and the light shielding unit 251 may be on different levels, that is, the heights of the light shielding unit 251 and the transparent glue unit 252 from the driving substrate 21 may be different, but in order to reduce the overall thickness of the touch display panel 80, the light shielding unit 251 and the transparent glue unit 252 may be disposed on the same layer, and in some examples, the protective sealing layer 25 may also be disposed to fit the upper surface of the LED pixel unit 22 or the touch sensing unit.
In some examples of the present embodiment, the touch display panel further includes a retaining wall, please refer to fig. 9a, in which the touch display panel 90 includes a retaining wall 26, the retaining wall 26 is disposed on the driving substrate 21 and is on the same side as the LED pixel unit 22, the touch sensing transmitting unit 23, and the touch sensing receiving unit 24, the retaining wall 26 may be disposed along an edge on the driving substrate 21, and the LED pixel unit 22, the touch sensing transmitting unit 23, and the touch sensing receiving unit 24 may be enclosed in the middle. In this way, no light can be emitted into the LED pixel unit 22 from the side surface of the touch display panel 90, which is beneficial to ensuring the display effect of the touch display panel 90. In some examples of this embodiment, the retaining wall 26 may be attached to the LED pixel cell 22 and/or the touch sensing cell located at the very edge, for example, see fig. 9b.
In still other examples, the protective sealing layer 25 and the retaining wall 26 are disposed at the same time, and the height of the retaining wall 26 is substantially identical to the heights of the LED pixel unit 22 and the touch sensing unit, or slightly greater than the heights of the LED pixel unit 22 and the touch sensing unit, so that external light is better blocked.
An electronic device is also provided in this embodiment, and may include a mobile terminal such as a mobile phone, tablet, notebook, palm top, personal digital assistant (Personal Digital Assistant, PDA), portable media player (Portable Media Player, PMP), navigation device, wearable device, smart bracelet, pedometer, and a stationary terminal such as a digital TV, desktop computer, and the like. Referring to fig. 10, the electronic device 1 includes a processor 101 and a touch display panel 102, wherein the touch display panel 102 may be any one of the touch display panels provided in the foregoing examples, the processor 101 is connected to a display driving circuit 1021, an inductive input signal line 1022 and an inductive output signal line 1023 in the touch display panel 102, and it is understood that the processor 101 may be connected to the display driving circuit 1021, the inductive input signal line 1022 and the inductive output signal line 1023 through a display driving chip 1024 and a touch control chip 1025, respectively. The processor 101 may control the LED pixel unit 22 to display through the display driving chip 1024 and the display driving circuit 1021 on the one hand, and may control the touch sensing transmitting unit 23 to transmit an ac signal through the touch control chip 1025 and the sensing input signal line 1022 on the other hand, and acquire a touch sensing result through the sensing output signal line 1023 and the touch control chip 1025.
It should be appreciated that although fig. 10 illustrates the touch display panel 102 as including the display driver chip 1024 and the touch control chip 1025, in some other examples, the touch display panel may not include the display driver chip and/or the touch control chip.
It is understood that the electronic device 1 may further include an RF (Radio Frequency) unit, a WiFi module, an audio output unit, a sensor, an interface unit, a memory, and the like, in addition to the processor 101 and the touch display panel 102.
The touch display panel provided by the embodiment not only realizes the integration of the touch sensing function and the display function, but also ensures that the touch sensing function does not additionally increase the thickness of the touch display panel because the touch sensing units are arranged in the gaps among the LED pixel units. Meanwhile, because the touch sensing units are adjacently arranged left and right, the thickness control occupied by the touch sensing units for forming the capacitor is further reduced, the thickness and the volume of the electronic equipment are reduced, and the portability of the electronic equipment is improved.
Another alternative embodiment of the invention:
in order to make the details and advantages of the foregoing touch display panel and the electronic device more apparent to those skilled in the art, the present embodiment will be further described with reference to fig. 11:
the touch display panel 110 includes a driving substrate 1101 and a protective sealing layer 1102, and also includes a plurality of LED pixel units 1103, a plurality of touch sensing transmitting units 1104 and a plurality of touch sensing receiving units 1105 disposed between the driving substrate 1101 and the protective sealing layer 1102.
Referring further to fig. 12, the led pixel unit 1103 is electrically connected to the display driving chip 1106 through a display driving circuit in the driving substrate 1101 so as to emit light for display under the driving of the display driving chip 1106; the touch sensing transmission unit 1104 is electrically connected with the sensing input signal line in the driving substrate 1101 to receive the ac signal transmitted from the touch control chip 1107 through the sensing input signal line and transmit the ac signal to the outside; the touch sensing reception unit 1105 is electrically connected to a sensing output signal line in the driving substrate 1101, and the touch sensing reception unit 1105 may sense an electrical signal and transmit the sensed electrical signal to the touch control chip 1107 through the sensing output signal line.
The driving substrate 1101 may be a normal substrate or a transparent substrate. In this embodiment, the display driving circuit, the sensing input signal line, and the sensing signal output line may be selectively disposed in the driving substrate 1101, or may be selectively disposed on the surface of the driving substrate 1101, and in some examples of this embodiment, the display driving circuit, the sensing input signal line, and the sensing signal output line are disposed on the surface of the driving substrate 1101, and these lines may be disposed in a gap between the LED pixel unit 1103 and the touch sensing unit, or may be disposed in a gap between the touch sensing unit and the touch sensing unit.
The touch sensing transmitting unit 1104 and the touch sensing receiving unit 1105 are disposed in a gap between adjacent LED pixel units 1103, and the touch sensing transmitting unit 1104, the touch sensing receiving unit 1105 and the LED pixel units 1103 are all at the same horizontal plane.
With continued reference to fig. 12, in the present embodiment, the touch sensing transmitting unit 1104, the touch sensing receiving unit 1105, and the LED pixel unit 1103 are arranged together in an array on the driving substrate 1101, the row direction of the array is parallel to the length direction of the driving substrate 1101, and the column direction of the array is parallel to the width direction of the driving substrate 1101. The touch sensing and transmitting units 1104 and the touch sensing and receiving units 1105 are staggered in the column direction of the array, and each row only comprises one type of touch sensing units, for example, only the touch sensing and transmitting units 1104 are included in one row, or only the touch sensing and receiving units 1105 are included in one row.
The protective seal layer 1102 includes a plurality of transparent adhesive units 11021 and a plurality of light shielding units 11022, wherein the positions of the transparent adhesive units 11021 correspond to the positions of the LED pixel units 1103, and the positions of the light shielding units 11022 correspond to the positions of the touch sensing units. The light shielding unit 11022 may be made of black glue.
In addition, in the present embodiment, the touch display panel 110 further includes a retaining wall 1108, where the retaining wall 1108 is disposed on a side of the driving substrate 1101 facing the protective sealing layer 1102, and in some examples of the present embodiment, the retaining wall 1108 may also be made of black glue. The retaining wall 1108 is disposed along the edge of the driving substrate 1101, and encloses the protective sealing layer 1102, the LED pixel unit and the touch sensing unit, and in some examples of this embodiment, in order to make the shape of the touch display panel 110 more regular, the upper surface of the protective sealing layer 1102 may be disposed flush with the upper surface of the retaining wall 1108. Referring to a schematic top view of the touch display panel 110 shown in fig. 13, the driving substrate 1101 and the touch sensing unit are not visible due to the shielding of the barrier 1108 and the protective sealing layer 1102, and only the LED pixel units 1103 are exposed through the transparent adhesive unit 11021.
The touch display panel provided by the embodiment can fully utilize the display space between the LED pixel units to realize the touch sensing function, greatly reduce the thickness of the touch display panel and enhance the market competitiveness of the touch display panel.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (8)
1. A touch display panel, comprising:
a plurality of LED pixel units;
a plurality of touch sensing transmission units;
a plurality of touch sensing reception units; and
a driving substrate;
the LED pixel unit, the touch sensing transmitting unit and the touch sensing receiving unit are arranged on the same surface of the driving substrate and are respectively and electrically connected with a display driving circuit, a sensing input signal line and a sensing output signal line on the driving substrate; the touch sensing transmitting unit, the touch sensing receiving unit and the LED pixel units are positioned on the same horizontal plane, the touch sensing transmitting unit and the touch sensing receiving unit are positioned in a gap between the LED pixel units, adjacent touch sensing transmitting units and the touch sensing receiving units form a capacitor, and a capacitance plate of the capacitor is perpendicular to the driving substrate;
the touch sensing transmitting units and the touch sensing receiving units are arranged together in an array, the touch sensing transmitting units are arranged on the driving substrate to form at least two transmitting sensing unit teams, the touch sensing transmitting units are arranged on the driving substrate to form at least two receiving sensing unit teams, the transmitting sensing unit teams are parallel to the receiving sensing unit teams, every two receiving sensing unit teams are arranged between the transmitting sensing units at intervals, and every two transmitting sensing unit teams are arranged between the receiving sensing unit teams at intervals.
2. The touch display panel of claim 1, further comprising a display driver chip configured to receive a control signal from a main control chip and to control the operation of the LED pixel unit through the display driver circuit according to the control signal.
3. The touch display panel according to claim 1, further comprising a touch control chip configured to control the touch sensing transmitting unit to transmit an alternating current signal through the sensing input signal line, and configured to receive an electric signal sensed by the touch sensing receiving unit through the sensing output signal line, and to determine whether a touch event occurs at a position on the touch display panel corresponding to the touch sensing receiving unit according to the electric signal.
4. The touch display panel of any one of claims 1-3, further comprising a protective seal layer disposed parallel to the drive substrate, wherein the LED pixel unit, the touch-sensitive transmitting unit, and the touch-sensitive receiving unit are between the drive substrate and the protective seal layer.
5. The touch display panel of claim 4, wherein the protective seal layer includes a plurality of light shielding units, a portion of the light shielding units being positioned opposite the touch sensing emission units, and another portion of the light shielding units being positioned opposite the touch sensing receiving units.
6. The touch display panel of claim 4, wherein the protective sealing layer comprises a plurality of transparent adhesive units, wherein the transparent adhesive units are positioned opposite to the LED pixel units.
7. The touch display panel of claim 4, further comprising a wall, the wall being on the same side of the drive substrate as the LED pixel unit, the wall being disposed along an edge of the drive substrate and enclosing the LED pixel unit, the touch sensing transmitting unit, and the touch sensing receiving unit in the middle.
8. An electronic device, comprising a processor and the touch display panel according to any one of claims 1-7, wherein the processor is configured to be communicatively connected to the LED pixel unit through a display driving chip and the display driving circuit; the processor is further configured to be in communication connection with the touch sensing transmitting unit and the touch sensing receiving unit through a touch control chip, and the touch control chip is respectively in communication connection with the sensing input signal line and the sensing output signal line.
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| CN202110818728.5A CN114035700B (en) | 2021-07-20 | 2021-07-20 | Touch display panel and electronic equipment |
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| CN202110818728.5A CN114035700B (en) | 2021-07-20 | 2021-07-20 | Touch display panel and electronic equipment |
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| WO2014051211A1 (en) * | 2012-09-26 | 2014-04-03 | 주식회사 지니틱스 | Conductive structure pattern, touch panel module, and electronic device |
| CN104077000A (en) * | 2014-06-16 | 2014-10-01 | 京东方科技集团股份有限公司 | Touch panel and driving method thereof and display device |
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