CN111857436B - Backlight source assembly, touch display module, touch display device and touch sensing method - Google Patents
Backlight source assembly, touch display module, touch display device and touch sensing method Download PDFInfo
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- CN111857436B CN111857436B CN202010751230.7A CN202010751230A CN111857436B CN 111857436 B CN111857436 B CN 111857436B CN 202010751230 A CN202010751230 A CN 202010751230A CN 111857436 B CN111857436 B CN 111857436B
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Classifications
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
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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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention relates to a backlight source assembly, a touch display module, a touch display device and a touch sensing method. The backlight assembly includes: a substrate having a mounting surface; a plurality of light emitting units are arranged on the mounting surface; and a plurality of photosensitive elements are arranged on the mounting surface, and at least one light emitting unit is arranged at any adjacent position of the photosensitive elements. When the object to be detected is positioned on one side of the mounting surface of the substrate, the backlight source assembly can acquire the position information of the object to be detected according to the intensity of the electric signals converted by the photosensitive elements. In addition, even if the object to be detected is not a conductor or the backlight assembly is positioned in an environment where the capacitive touch module cannot work, such as under water, the backlight assembly can perform a touch sensing function, and the applicability is stronger.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a backlight assembly, a touch display module, a touch display device, and a touch sensing method.
Background
Along with the development of touch sensing technology, more and more touch display devices are configured with capacitive touch modules so that the touch display devices have touch sensing functions at the same time. In a traditional capacitive touch module, a capacitor is formed between electrode layers, when a conductor such as a finger touches, the local capacitance between the electrode layers can be caused to change, and the touch position of the conductor can be obtained by detecting the position where the capacitance changes, so that a touch sensing function is realized.
However, when the conventional capacitive touch module is applied to an underwater environment, since water is also a conductor, the capacitance between the electrode layers can be changed, and the capacitance change caused by water can interfere with the capacitance change caused by finger touch, so that the capacitive touch module is difficult to accurately acquire the touch position of the finger, and the touch sensing function cannot be realized.
Disclosure of Invention
Based on this, it is necessary to provide a backlight assembly, a touch display module, a touch display device and a touch sensing method for solving the problem that the conventional capacitive touch module cannot realize the touch sensing function when being applied to an underwater environment.
A backlight assembly, comprising:
a substrate having a mounting surface;
A plurality of light emitting units are arranged on the mounting surface; and
The light-sensitive element is provided with a plurality of, the light-sensitive element set up in on the installation face, and arbitrary light-sensitive element's adjacent position is provided with at least one light-emitting unit.
In one embodiment, the light emitting units and the photosensitive elements are alternately arranged in a first direction, and the light emitting units and the photosensitive elements are alternately arranged in a second direction, wherein the first direction and the second direction are two orthogonal directions on a plane parallel to the mounting surface.
In one embodiment, the light emitting units and the photosensitive elements are alternately arranged in a first direction, the light emitting units are adjacently arranged in a second direction, the photosensitive elements are adjacently arranged, and the first direction and the second direction are two orthogonal directions on a plane parallel to the mounting surface.
In one embodiment, the distribution array of the photosensitive elements and the light emitting units includes a first distribution row and a second distribution row, in a first direction, the light emitting units are adjacently arranged to form the first distribution row, the light emitting units and the photosensitive elements are alternately arranged to form the second distribution row, in a second direction, the first distribution row and the second distribution row are alternately arranged, one of the second distribution row is opposite to two light emitting units in the first distribution row, and the first direction and the second direction are two orthogonal directions on a plane parallel to the mounting surface.
In one embodiment, the distance between the geometric centers of two adjacent photosensitive elements is less than or equal to 6mm.
A touch display module comprises a display assembly and the backlight assembly according to any of the above embodiments, wherein the display assembly is used for forming images, the display assembly and the backlight assembly are stacked, and the mounting surface faces the display assembly.
In one embodiment, the backlight assembly further includes a capacitive touch assembly, and the capacitive touch assembly is configured to obtain position information of the conductor according to capacitance change, and the capacitive touch assembly is disposed on a side of the display assembly, which is away from the backlight assembly, and the capacitive touch assembly and the photosensitive element alternately operate.
In one embodiment, the touch display module further includes a detection element, where the detection element is configured to detect a capacitance value of a side of the capacitive touch component, which is away from the display component, and when the detection element detects that a capacitance value change of the side of the capacitive touch component, which is away from the display component, is greater than or equal to 10%, the capacitive touch component is turned off, and the photosensitive element is turned on.
A touch display device comprises a shell and the touch display module set in any embodiment, wherein the touch display module set is arranged on the shell.
A touch sensing method for acquiring position information of a measured object includes:
providing a backlight assembly as described in any of the above embodiments, wherein the mounting surface is opposite the test object;
the light-emitting surface of the light-emitting unit emits light towards the object to be detected, and the surface of the light-emitting unit, which faces away from the mounting surface, is a light-emitting surface;
the photosensitive surface of the photosensitive element receives light reflected by the object to be detected, wherein the surface of the photosensitive element, which is away from the mounting surface, is a photosensitive surface;
And acquiring the position information of the object to be detected according to the intensity of the light received by the photosensitive elements.
In the backlight assembly, the light emitting units and the photosensitive elements are arranged on the same mounting surface, and one photosensitive element is arranged adjacent to at least one light emitting unit. Therefore, when the object to be measured is positioned on one side of the mounting surface of the substrate, the light emitted by the light emitting unit can be absorbed by the adjacent photosensitive elements after being reflected by the object to be measured, and the intensity of the light received by the photosensitive elements which are farther from the object to be measured is weaker. The photosensitive elements can convert the received optical signals into electric signals, and the position information of the measured object can be obtained according to the intensity of the electric signals converted by the photosensitive elements. By adopting the backlight source assembly, the position information of the tested object can be obtained as long as the tested object can reflect the light rays emitted by the light emitting unit to the photosensitive element. Therefore, even if the object to be measured is not a conductor or the backlight assembly is located in an environment where the conventional capacitive touch module cannot work, such as under water, the backlight assembly can perform a touch sensing function, so that the applicability is stronger.
Drawings
FIG. 1 is a schematic diagram of a touch display module according to some embodiments of the application;
FIG. 2 is a schematic diagram of a distributed array of light emitting cells and light sensitive elements according to some embodiments of the present application;
FIG. 3 is a schematic diagram of the distributed array of FIG. 2 for implementing a touch sensing function;
FIG. 4 is a schematic diagram of a distributed array of light emitting cells and light sensitive elements according to another embodiment of the present application;
FIG. 5 is a schematic diagram of a distributed array of light emitting units and light sensitive elements according to still other embodiments of the present application;
fig. 6 is a schematic diagram of a touch sensing method according to some embodiments of the application.
100, A touch display module; 110. a test object; 120. a backlight assembly; 121. a substrate; 122. a mounting surface; 123. a light emitting unit; 124. a light emitting surface; 125. a photosensitive element; 126. a light-sensitive surface; 127. a first distribution row; 128. a second distribution row; 130. a display assembly; 140. a glass cover plate; 141. a touch surface; 150. a capacitive touch assembly; 160. a first direction; 170. a second direction.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Referring to fig. 1, fig. 1 is a schematic diagram of a touch display module 100 according to some embodiments of the present application, the touch display module 100 has an image display function and a touch sensing function for a measured object 110, wherein the measured object 110 may be a finger of a user. Specifically, the touch display module 100 includes a backlight assembly 120 and a display assembly 130. The backlight assembly 120 includes a substrate 121, a surface of the substrate 121 facing the display assembly 130 is a mounting surface 122, and a plurality of light emitting units 123 are disposed on the mounting surface 122, where the light emitting units 123 can be used as a backlight source of the display assembly 130. The display assembly 130 may include a material with a light modulation function, such as a liquid crystal layer, for modulating light emitted from the backlight assembly 120 to form an image on a side of the display assembly 130 facing away from the backlight assembly 120. For example, in some embodiments, display assembly 130 may be understood as a liquid crystal panel in a liquid crystal display.
Specifically, the backlight assembly 120 further includes a plurality of photosensitive elements 125 disposed on the mounting surface 122, the photosensitive elements 125 and the light emitting units 123 are disposed on the mounting surface 122 at intervals, each photosensitive element 125 is disposed adjacent to at least one light emitting unit 123, and at least one light emitting unit 123 is disposed adjacent to any one photosensitive element 125, that is, each photosensitive element 125 can be disposed adjacent to at least one of the plurality of light emitting units, so that light emitted by the light emitting unit 123 can enter the photosensitive element 125 adjacent to the light emitting unit 123 after being reflected by the object to be measured. In some embodiments, the touch display module 100 further includes a glass cover plate 140, the glass cover plate 140 is disposed on a side of the display assembly 130 facing away from the backlight assembly 120, and a surface of the glass cover plate 140 facing away from the display assembly 130 is a touch surface 141. The glass cover 140 can be used as a window of the touch display module 100, and also protects the display assembly 130 and the backlight assembly 120.
In the backlight assembly 120, the light emitting unit 123 and the photosensitive element 125 are disposed on the same mounting surface 122, when the object 110 is located on the touch surface 141 side of the glass cover 140, the light emitted by the light emitting unit 123 reaches the surface of the object 110, and after being reflected by the object 110, the light can be absorbed by the adjacent photosensitive element 125, and the light intensity received by the photosensitive element 125 further away from the object 110 is weaker. The photosensitive elements 125 can convert the received optical signals into electrical signals, and the position information of the measured object 110 can be obtained according to the intensity of the electrical signals converted by the photosensitive elements 125. With the backlight assembly 120, the position information of the object 110 can be obtained as long as the object 110 can reflect the light emitted from the light emitting unit 123 onto the photosensor 125. Therefore, even if the object 110 is not a conductor or the backlight assembly 120 is located in an environment where the conventional capacitive touch module cannot operate, such as under water, the backlight assembly 120 can perform a touch sensing function, so that the applicability is stronger.
Further, referring to fig. 1 and 2, in some embodiments, the light emitting unit 123 may be a Light Emitting Diode (LED). Still further, in some embodiments, the light emitting unit 123 may be a sub-millimeter light emitting diode (Mini LED), which is understood as an LED product with a die size greater than 75um and provided with a sapphire substrate. The light emitting units 123 are uniformly distributed on the mounting surface 122 in a regular array, so that the light emitted by each light emitting unit 123 of the backlight assembly 120 is uniformly distributed on a plane parallel to the mounting surface 122, so as to ensure that the light intensities of different positions entering the display assembly 130 from the backlight assembly 120 are the same. Therefore, the light emitting unit 123 can be used as a backlight source of the display assembly 130 while being matched with the photosensitive element 125 to realize the touch sensing function, and the display assembly 130 does not need to be additionally provided with the backlight source, which is beneficial to reducing the thickness dimension of the touch display module 100.
In some embodiments, the photosensor 125 may be a photodiode, a phototransistor, a photocell, a photofield effect transistor, a photoresistor, or the like, capable of converting an optical signal into an electrical signal, so long as the photosensor 125 is capable of receiving light reflected by the object 110 and converting the optical signal into an electrical signal. When the photosensitive elements 125 are photoelectric conversion elements such as photodiodes and photocells capable of absorbing light and generating corresponding currents, the position information of the object 110 can be obtained by obtaining the magnitude of the currents generated by the photosensitive elements 125. When the photosensor 125 is a photoelectric element such as a photoresistor, which can change its electrical properties according to light, the photosensor 125 is continuously energized during the touch sensing process. When the photoresistor receives the light reflected by the object 110, the electrical property, such as resistance, of the photoresistor 125 changes, so that the current value of the electrical loop where the photoresistor 125 is located changes, and the position information of the object 110 can be obtained according to the magnitude of the current value change of the electrical loop where each photoresistor 125 is located.
Also, referring to fig. 2, in some embodiments, the photosensitive elements 125 are also distributed on the mounting surface 122 in a regular array, and the photosensitive elements 125 and the light emitting units 123 together form a regular distributed array. The regularly distributed array makes the photosensitive elements 125 and the light emitting units 123 uniformly distributed on the mounting surface 122, so that the influence of uneven light distribution emitted from the mounting surface 122 or uneven distribution of the photosensitive elements 125 on touch sensing accuracy can be avoided. The arrangement rule of the photosensitive elements 125 and the light emitting units 123 is not limited, as long as each photosensitive element 125 can be adjacent to at least one light emitting unit 123, and can cooperate with the light emitting unit 123 to realize a touch sensing function. For example, in some embodiments, in a regularly distributed array of photosensors 125 and light-emitting cells 123, light-emitting cells 123 alternate with photosensors 125 in a first direction 160 and light-emitting cells 123 alternate with photosensors 125 in a second direction 170. The first direction 160 and the second direction 170 are two orthogonal directions on a plane parallel to the mounting surface 122.
At this time, referring to fig. 1 and 3 together, when the object 110 is located on the touch surface 141 side of the touch sensing module, the object 110 is opposite to a portion of the light emitting units 123 and the photosensitive elements 125. For example, in the embodiment shown in fig. 3, the object 110 is opposite to the photosensitive element a, part of the photosensitive element B, part of the photosensitive element C, the light emitting unit D, part of the light emitting unit E, and part of the light emitting unit F, and the area of the portion of the object 110 opposite to the photosensitive element B is larger than the area of the portion of the object 110 opposite to the photosensitive element C. When the light emitting unit 123 emits light toward the object 110, the object 110 reflects part of the light emitted from the light emitting units D, E, and F to the surfaces of the photosensitive elements a, B, and C. And the light received by the photosensitive element A is the largest, namely the light intensity received by the photosensitive element A is the largest, and the light intensities received by the photosensitive element B and the photosensitive element C are gradually decreased. Therefore, the current values of light absorption conversion of the photosensitive element a, the photosensitive element B and the photosensitive element C are also sequentially reduced, that is, it can be understood that the intensities of the electric signals converted by the photosensitive element a, the photosensitive element B and the photosensitive element C are sequentially reduced according to the light signals, and the position information of the object 110 can be obtained according to the intensities of the electric signals converted by the photosensitive element a, the photosensitive element B and the photosensitive element C.
It will be appreciated that the stronger the intensity of light received by photosensor 125, the closer the geometric center of object 110 to the geometric center of photosensor 125 will be understood. For example, in the embodiment shown in fig. 3, the geometric center of the object 110 is closest to the geometric center of the photosensor a, and the distance between the geometric center of the object 110 and the geometric center of the photosensor B is smaller than the distance between the geometric center of the object 110 and the geometric center of the photosensor C.
Referring to fig. 1 and 4, in some embodiments, in a regularly distributed array formed by the photosensors 125 and the light emitting units 123, the light emitting units 123 and the photosensors 125 are alternately arranged in the first direction 160, and in the second direction 170, the light emitting units 123 are disposed adjacent to each other, and the photosensors 125 are disposed adjacent to each other. It will be appreciated that in the embodiment shown in fig. 4, the area of the portion of the object 110 opposite to the photosensitive element G is larger than the area of the portion of the object 110 opposite to the photosensitive element H. When the light emitting unit 123 emits light toward the object 110, the intensity of the light received by the light sensitive element G is greater than the intensity of the light received by the light sensitive element H, and the object 110 is opposite to the light sensitive element G and the light sensitive element H according to the intensity of the electrical signals converted by the light sensitive element G and the light sensitive element H, and the distance between the geometric center of the object 110 and the geometric center of the light sensitive element G is smaller than the distance between the geometric center of the object 110 and the geometric center of the light sensitive element H.
In addition, referring to fig. 5, in some embodiments, the distributed array of photosensors 125 and light emitting cells 123 includes a first distributed row 127 and a second distributed row 128. Wherein, in the first direction 160, the light emitting units 123 are adjacently disposed to form a first distribution line 127, the light emitting units 123 and the photosensitive elements 125 are alternately arranged to form a second distribution line 128, and in the second direction 170, the first distribution line 127 and the second distribution line 128 are alternately arranged. And in the second direction 170, one photosensor 125 in the second distribution row 128 is disposed opposite to the two light emitting units 123 in the first distribution row 127, which is to be understood as that in the distribution array of photosensors 125 and light emitting units 123, one photosensor 125 in the second distribution row 128 is located in the same column as the two light emitting units 123 in the first distribution row 127.
It can be understood that in the embodiment shown in fig. 5, the object 110 is disposed opposite to the photosensitive element I, and when the light emitting unit 123 emits light toward the object 110, the greater the intensity of the light received by the photosensitive element I, the information about the relative position of the object 110 and the photosensitive element I can be obtained according to the intensity of the light received by each photosensitive element 125.
It should be noted that, in the embodiment shown in fig. 5, the object 110 is opposite to only one photosensor 125, which does not mean that the light reflected by the object 110 only reaches the surface of the photosensor I, and the light may be emitted toward a direction inclined to the mounting surface 122 after being reflected by the surface of the object 110 due to the curved surface or the diffuse reflection surface of the object 110, and is received by the other photosensors 125. In addition, the intensity of the electrical signal converted by each photosensor 125 decreases in order in the direction in which the photosensor I is directed to the edge of the mounting surface 122, and the positional information of the object 110 can be obtained from the relationship between the intensity of the electrical signal converted by each photosensor 125. Similarly, in the embodiment shown in fig. 5, the measured object 110 is disposed opposite to the 5 light emitting units 123, which does not mean that only the light emitted by the 5 light emitting units 123 can reach the surface of the measured object 110 and reflect, and since the light emitted by the light emitting units 123 has a divergence angle, the light emitted by other light emitting units 123 may also be obliquely incident to the surface of the measured object 110.
Also, it is understood that in the embodiment shown in fig. 5, the number of light emitting units 123 is greater than the number of photosensors 125, and then the number of light emitting units 123 adjacent to one photosensor 125 is greater than the number of light emitting units 123 adjacent to one photosensor 125 in fig. 3 and 4. Thus, in the embodiment shown in fig. 5, the object 110 reflects more light emitted from the light emitting unit 123 onto the photosensitive element I, so that the ratio of the electrical signal converted by the photosensitive element I to the electrical signal converted by the other photosensitive element 125 is greater. That is, it can be understood that, on the mounting surface 122, the greater the ratio of the number of the light emitting units 123 to the number of the photosensors 125, the more obvious the comparison between the intensity of the electrical signals converted by each photosensor 125, and the easier it is to obtain the positional information of the object 110 according to the intensity relationship of the electrical signals converted by each photosensor 125.
It should be noted that, in the embodiment shown in fig. 5, only a portion of the photosensors 125 and the light emitting units 123 on the mounting surface 122 are shown, and in some embodiments, a greater number of photosensors 125 and light emitting units 123 may be disposed on the mounting surface 122, as long as the arrangement rules of the photosensors 125 and the light emitting units 123 are unchanged. Further, in some embodiments, the light emitting units 123 are disposed around the photosensitive elements 125, that is, adjacent light emitting units 123 are disposed around each photosensitive element 125, so as to ensure that the photosensitive elements 125 can sufficiently receive the light reflected by the object 110. In other embodiments, more photosensitive elements 125 and light emitting units 123 may be provided, and the photosensitive elements 125 may be surrounded by the light emitting units 123, which is not described herein.
In addition, in the embodiments shown in fig. 3,4 and 5, the distance between the geometric centers of two adjacent photosensors 125 is less than or equal to 6mm. For example, in the embodiment shown in FIG. 3, the distance between photosensor 125A and the geometric center of photosensor 125B and the distance between photosensor 125B and the geometric center of photosensor 125C are each 6mm. The smaller the distance between the geometric centers of two adjacent photosensors 125, i.e., the greater the distribution density of photosensors 125 on mounting surface 122, the greater the probability that light reflected from an equally sized object 110 will reach photosensors 125, the more accurate the positional information of object 110 will be obtained.
Of course, in the embodiments shown in fig. 3,4 and 5, only the photosensitive elements 125 and the light emitting units 123 on the upper portion of the mounting surface 122 are shown, and according to the change of the area of the mounting surface 122, the number of the photosensitive elements 125 and the light emitting units 123 may be other arrangements, and the arrangement rules of the photosensitive elements 125 and the light emitting units 123 are not changed, so as to form a regularly distributed array together. The surface of the light emitting unit 123 facing away from the mounting surface 122 is a light emitting surface 124, the surface of the photosensor 125 facing away from the mounting surface 122 is a photosurface 126, and the shapes of the light emitting surface 124 and the photosurface 126 are not limited. In some embodiments, the light emitting surface 124 may be circular and the light sensing surface 126 may be square or rectangular.
Referring to fig. 1 again, in some embodiments, the touch display module 100 may further include a capacitive touch assembly 150, where the capacitive touch assembly 150 is disposed on a side of the display assembly 130 facing away from the backlight assembly 120, and is configured to obtain the position information of the conductor according to the capacitance change. In addition, the electrodes in the capacitive touch assembly 150 may be disposed on the glass cover 140, and at this time, the glass cover 140 and the capacitive touch assembly 150 may be integrated into a capacitive touch module in a conventional capacitive touch screen. It can be understood that, when the object 110 is a conductor, the capacitive touch assembly 150 can also realize a touch sensing function on the object 110 on the touch surface 141 side of the touch display module 100, so that the capacitive touch assembly 150 can alternately operate with the photosensitive element 125 to jointly realize the touch sensing function on the object 110.
For example, when the object 110 is a conductor and no other conductor on the touch surface 141 interferes with the sensing of the object 110, the capacitive touch assembly 150 works, the light emitting unit 123 emits light toward the display assembly 130 as a backlight source of the display assembly 130, and the photosensitive element 125 is turned off, so that the touch sensing function of the touch display module 100 is realized through the capacitive touch assembly 150. When the object 110 is a non-conductor or other conductors exist on the touch surface 141 to interfere with the sensing of the object 110, for example, when the touch display module 100 is located in an underwater environment, the capacitive touch assembly 150 is turned off, the photosensitive element 125 works, and the photosensitive element 125 cooperates with the light emitting unit 123 to realize the touch sensing function of the touch display module 100. Through setting up capacitive touch control assembly 150, when the measured object 110 is conductor or nonconductor, or when touch control display assembly 130 is in special environment such as under water, touch control display assembly 130 can both carry out touch control response to the measured object 110, makes touch control display assembly 130's application scope wider, and the suitability is strong.
It should be understood that, in some embodiments, the touch display module 100 should further include a data processing component (not shown), which may include a single-chip microcomputer or a microcomputer, for acquiring the position information of the object 110 according to the intensity of the electrical signal converted by each photosensor 125. The substrate 121 should be further provided with a connection circuit (not shown) for electrically connecting the photosensor 125 and the touch display module 100, and the substrate 121 may be a circuit board or a flexible circuit board (FPC). Also, in some embodiments, each photosensor 125 may form an independent loop between the connection lines on the substrate 121 and the data processing component, so that the data processing component accurately obtains the intensity information of the electrical signal converted by each photosensor 125.
In addition, in some embodiments, the touch display module 100 may be assembled with the housing to form a touch display device (not shown), where the touch display device may be an electronic device with a display function and a touch sensing function, such as a mobile phone, a tablet computer, a liquid crystal touch display screen, and the glass cover 140 is a display window of the touch display device. And when the touch display device is a mobile phone, the shell can be a middle frame of the touch display device, and when the touch display device is a liquid crystal touch display screen, the shell can be a shell of the touch display device.
Further, referring to fig. 1 and fig. 6 together, fig. 6 shows a touch sensing method according to some embodiments of the present application, where the touch sensing method implements a touch sensing function on a measured object 110 by using the above-mentioned backlight assembly 120, and specifically, the touch sensing method includes:
s110, providing the backlight assembly 120 and the glass cover plate 140 according to any of the above embodiments, the mounting surface 122 is opposite to the object 110, and the object 110 is located on the touch surface 141 side of the glass cover plate 140.
S120, turning on the light emitting unit 123, and the light emitting surface 124 of the light emitting unit 123 emits light toward the object 110. The light emitted from the light emitting unit 123 is reflected by the object 110 and then reflected back toward the mounting surface 122.
S130, turning on the photosensor 125, the photosurface 126 of the photosensor 125 receives the light reflected by the object 110 and converts the light signal into an electrical signal.
S140, the position information of the object 110 is obtained according to the intensity of the light received by each photosensor 125, i.e. according to the intensity relationship of the electrical signals converted by each photosensor 125.
Still further, in some embodiments, the touch sensing method may further include, before turning on the photosensor 125:
The use environment of the touch display module 100 is obtained, and when the use environment of the touch display module 100 is an underwater environment, the photosensitive element 125 is turned on. Of course, if the use environment of the touch display module 100 is an air environment and the object 110 is a conductor, the photosensitive element 125 is not turned on, and the touch sensing function is only implemented through the capacitive touch component 150. Specifically, the use environment of the touch display module 100 may be obtained by determining, by the data processing component, the electrical performance of the touch surface 141 side of the glass cover 140, or by manually inputting an instruction to the data processing component. For example, in some embodiments, the touch display module 100 further includes a detecting element (not shown) for detecting a capacitance value of a side of the capacitive touch assembly 150 facing away from the display assembly 130. When the detecting element detects that the capacitance change of the capacitive touch assembly 150 at the side away from the display assembly 130 is greater than or equal to 10%, it can be known that the touch display module 100 is in an underwater environment. At this time, the detection element sends a signal to the capacitive touch assembly 150 and the photosensor 125, so that the capacitive touch assembly 150 is turned off and the photosensor 125 is turned on.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a touch-control display module assembly, its characterized in that includes display element and backlight unit, display element is used for with the light that backlight unit sent carries out the modulation and forms the image, display element with backlight unit stacks up the setting, backlight unit includes:
A base plate having a mounting face, the mounting face facing the display assembly;
A plurality of light emitting units, wherein the plurality of light emitting units are arranged on the mounting surface; and
The light-emitting device comprises a mounting surface, a plurality of light-sensitive elements, at least one light-emitting unit and a light-emitting unit, wherein the light-sensitive elements are arranged on the mounting surface, and at least one light-emitting unit is arranged at the adjacent position of any one light-sensitive element;
The light sensitive element is used for receiving light reflected by the object to be detected, and the backlight source assembly is configured to be capable of acquiring position information of the object to be detected according to the intensity of the light received by the light sensitive element.
2. The touch display module of claim 1, wherein in a first direction, the light emitting units and the photosensitive elements are alternately arranged, and in a second direction, the light emitting units and the photosensitive elements are alternately arranged, and the first direction and the second direction are two orthogonal directions on a plane parallel to the mounting surface.
3. The touch display module of claim 1, wherein in a first direction, the light emitting units and the photosensitive elements are alternately arranged, in a second direction, the light emitting units are adjacently arranged, the photosensitive elements are adjacently arranged, and the first direction and the second direction are two orthogonal directions on a plane parallel to the mounting surface.
4. The touch display module according to claim 1, wherein the distribution array of the photosensitive elements and the light emitting units includes a first distribution row and a second distribution row, in a first direction, the light emitting units are adjacently disposed to form the first distribution row, the light emitting units and the photosensitive elements are alternately arranged to form the second distribution row, in a second direction, the first distribution row and the second distribution row are alternately arranged, and one of the second distribution row is opposite to two of the light emitting units in the first distribution row, and the first direction and the second direction are two orthogonal directions on a plane parallel to the mounting surface.
5. The touch display module of any one of claims 1-4, wherein a distance between geometric centers of two adjacent photosensitive elements is less than or equal to 6mm.
6. The touch display module of claim 1, wherein the display component comprises a liquid crystal.
7. The touch display module of claim 1, further comprising a capacitive touch assembly configured to obtain positional information of the conductor according to a change in capacitance, the capacitive touch assembly being disposed on a side of the display assembly facing away from the backlight assembly, the capacitive touch assembly and the photosensitive element alternately operating.
8. The touch display module of claim 7, further comprising a detection element, wherein the detection element is configured to detect a capacitance value of a side of the capacitive touch assembly facing away from the display assembly, and when the detection element detects that a capacitance value change of the side of the capacitive touch assembly facing away from the display assembly is greater than or equal to 10%, the capacitive touch assembly is turned off, and the photosensitive element is turned on.
9. A touch display device, comprising a housing and the touch display module set according to any one of claims 1 to 8, wherein the touch display module set is disposed on the housing.
10. The touch sensing method is used for acquiring the position information of the object to be detected and is characterized by comprising the following steps:
providing a touch display module according to any one of claims 1-8, wherein the mounting surface is opposite to the measured object;
the light-emitting surface of the light-emitting unit emits light towards the object to be detected, and the surface of the light-emitting unit, which faces away from the mounting surface, is a light-emitting surface;
the photosensitive surface of the photosensitive element receives light reflected by the object to be detected, wherein the surface of the photosensitive element, which is away from the mounting surface, is a photosensitive surface;
And acquiring the position information of the object to be detected according to the intensity of the light received by the photosensitive elements.
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