CN114038343A - Display screen and terminal - Google Patents
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- CN114038343A CN114038343A CN202110817971.5A CN202110817971A CN114038343A CN 114038343 A CN114038343 A CN 114038343A CN 202110817971 A CN202110817971 A CN 202110817971A CN 114038343 A CN114038343 A CN 114038343A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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Abstract
The invention relates to a display screen and a terminal. The display screen comprises an LED pixel unit and a display driving circuit for driving the LED pixel unit to display, and also comprises a filtering unit, a photosensitive unit and a photosensitive input circuit for transmitting the photosensitive result of the photosensitive unit. Therefore, the display screen can utilize the photosensitive unit to convert light rays penetrating through the light filtering unit into electric signals in a sensing mode, image acquisition is achieved, and the effect of integration of an image display function and an image acquisition function is achieved. When the display screen is arranged in the terminal, an independent camera module is not required to be arranged below the screen for image shooting, so that the thickness and the cost of the terminal can be greatly reduced, and the portability and the product competitiveness of the terminal are improved.
Description
Technical Field
The invention relates to the technical field of electronics, in particular to a display screen and a terminal.
Background
At present, all set up the camera module in order to realize image acquisition on terminal equipment such as cell-phone, PAD, in order to set up the camera module, need trompil on the display screen under the general condition to make the camera module obtain sufficient window of finding a view, this display effect that can seriously influence the display screen obviously. Even if the camera module can set up and realize image acquisition under the screen under the display screen, nevertheless because camera module itself is thick, so also can restrict the reduction of terminal thickness, influence the promotion of terminal portability, and then restrict the product competitiveness at terminal.
Therefore, how to reduce the thickness of the terminal is a problem to be solved.
Disclosure of Invention
In view of the above-mentioned shortcomings of the related art, an object of the present invention is to provide a display screen and a terminal, which aim to solve the problem that the thickness of the terminal cannot be reduced and the portability is poor due to the need of separately arranging a camera module in the terminal at present.
A display screen, comprising:
a carrier substrate;
a transparent filter arrangement substrate;
a display layer comprising a plurality of LED pixel cells configured to convert an electrical signal to an optical signal;
a photosensitive layer including a plurality of photosensitive cells configured to convert an optical signal into an electrical signal; and
a filter layer including a plurality of filter units;
the light filtering unit is arranged on the light filtering setting substrate, and the LED pixel unit and the photosensitive unit are both arranged on the bearing substrate and are respectively and electrically connected with the display driving circuit and the photosensitive input circuit on the bearing substrate; the light incident surface of the light sensing unit and the light emergent surface of the LED pixel unit face the same direction, and the light incident surface of the light sensing unit faces the light filtering unit; the photosensitive unit is positioned in the space between the adjacent LED pixel units, and the position of the photosensitive unit corresponds to the filtering unit.
The display screen comprises an LED pixel unit and a display driving circuit for driving the LED pixel unit to display, and also comprises a filtering unit, a photosensitive unit and a photosensitive input circuit for transmitting a photosensitive result of the photosensitive unit. Therefore, the display screen can utilize the photosensitive unit to convert light rays penetrating through the light filtering unit into electric signals in a sensing mode, image acquisition is achieved, and the effect of integration of an image display function and an image acquisition function is achieved. When the display screen is arranged in the terminal, an independent camera module is not required to be arranged below the screen for image shooting, so that the thickness and the cost of the terminal can be greatly reduced, and the portability and the product competitiveness of the terminal are improved.
Optionally, the display driving circuit further comprises a display driving chip and a photosensitive processing chip, wherein the display driving chip is configured to receive a control signal from the main control chip and control the LED pixel unit to operate through the display driving circuit according to the control signal; the photosensitive processing chip is configured to receive the electrical signal converted by the photosensitive unit through the photosensitive input circuit and convert the electrical signal into image data.
Optionally, a unidirectional anti-reflection film is further included in the display screen, and the unidirectional anti-reflection film is arranged on the side, away from the photosensitive unit, of the filtering unit.
Among the above-mentioned display screen, one side of keeping away from the photosensitive layer at the light filtering unit still is provided with one-way antireflection film, also is provided with one-way antireflection film in light incoming surface one side of light filtering unit, and this one-way antireflection film can avoid the light of light filtering unit to the external escape to make light filtering unit "stealthy" in the vision, not only be favorable to promoting the image acquisition effect, also avoided the visual pollution that light filtering unit caused simultaneously, be favorable to strengthening the display effect of display screen.
Optionally, the display layer is at the same level as the photosensitive layer.
In the display screen, the display layer and the photosensitive layer are positioned at the same level, so that the total thickness of the display layer and the photosensitive layer can be reduced, and the thickness of the display screen is further reduced.
Optionally, the display screen further includes a first retaining wall disposed along an edge of the carrier substrate and enclosing the display layer and the photosensitive layer in the middle.
In the display screen, the first retaining wall is arranged around the LED pixel unit and the photosensitive unit, so that external light can be prevented from entering the LED pixel unit and the photosensitive unit, the influence of the external light on the display effect of the display screen is avoided, and the influence of the external light on the image acquisition effect of the photosensitive unit is also avoided.
Optionally, the filter layer further includes a transparent adhesive layer opposite to the LED pixel units in the display layer.
In the display screen, the transparent adhesive layer is arranged in the filter layer corresponding to the LED pixel units, the transparent adhesive layer does not influence the emergent light of the LED pixel units, the LED pixel units can be protected, the transparent adhesive layer and the filter layer can form a barrier, external water vapor and dust can be protected and blocked, and the reliability of the LED pixel units and the photosensitive units is improved.
Optionally, the display screen further includes a second retaining wall, and the second retaining wall is disposed along an edge of the filtering setting substrate and encloses the filtering layer in the middle.
Optionally, the display screen includes a first area and a second area, and the photosensitive unit and the filtering unit are only distributed in the first area; in the second region, a light blocking unit is disposed in a space between adjacent LED pixel units.
Alternatively, the light sensing units are uniformly distributed in the entire area of the display screen.
Based on the same inventive concept, the invention further provides a terminal, which includes a main control chip and the display screen, wherein the display driving circuit and the photosensitive input circuit in the display screen are respectively in communication connection with the main control chip, and the main control chip is configured to control the LED pixel unit to display through the display driving circuit and to obtain an image acquisition result of the photosensitive unit through the photosensitive input circuit.
The display screen of the terminal comprises an LED pixel unit and a display driving circuit for driving the LED pixel unit to display, and also comprises a filtering unit, a photosensitive unit and a photosensitive input circuit for transmitting a photosensitive result of the photosensitive unit. Therefore, the display screen can utilize the photosensitive unit to convert light rays penetrating through the light filtering unit into electric signals in a sensing mode, image acquisition is achieved, and the effect of integration of an image display function and an image acquisition function is achieved. Therefore, an independent camera module is not required to be arranged below the screen in the terminal for image shooting, so that the thickness and the cost of the terminal can be greatly reduced, and the portability and the product competitiveness of the terminal are improved.
Drawings
Fig. 1 is a schematic view of a setting position of a display screen and a camera module in the related art according to the present invention;
fig. 2 is a schematic cross-sectional view of a first display screen according to an alternative embodiment of the present invention;
fig. 3 is a schematic structural diagram of a filtering unit set according to an alternative embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a second display screen provided in an alternative embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a division of a camera area and a non-camera area on a display screen according to an alternative embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a third display screen provided in an alternative embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a fourth display screen provided in an alternative embodiment of the present invention;
fig. 8 is a schematic cross-sectional view of a fifth display screen provided in an alternative embodiment of the present invention;
fig. 9 is a schematic diagram of a hardware structure of a terminal according to an alternative embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a display screen according to another alternative embodiment of the present invention;
FIG. 11 is a schematic diagram of a circuit configuration in a display screen provided in an alternative embodiment of the present invention;
FIG. 12 is a diagram illustrating a photosensitive processing chip for obtaining voltage values of photosensitive cells according to another alternative embodiment of the present invention.
Description of reference numerals:
101-a camera module; 102-a display screen; 1021-a light transmitting area; 1022-a non-light transmitting region; 20-a display screen; 201-a first area; 202-a second area; 21-a carrier substrate; 211-display carrier substrate; 212-photosensitive carrier substrate; 22-a filter setting substrate; 23-a display layer; 230-LED pixel cells; 24-a photosensitive layer; 240-a photosensitive unit; 25-a filter layer; 250-a filter unit; 251-a transparent adhesive layer; 2501-red light filtering unit; 2502-blue light filtering unit; 2503-green light filtering unit; 2504-one-way anti-reflective film; 260-a light blocking unit; 271-a first retaining wall; 272-a second retaining wall; 40-a display screen; 60-a display screen; 70-a display screen; 9-a terminal; 91-a master control chip; 92-a display screen; 921 — display driving circuit; 922-a photosensitive input circuit; 931 — display driver chip; 932-a photosensitive processing chip; 100-a display screen; 111-a carrier substrate; 112-a filter setting substrate; 121-LED pixel cells; 122-a light-sensitive unit; 123-a filter unit; 1230-one-way anti-reflection film; 124-a transparent layer; 131-a first retaining wall; 132-a second retaining wall; 141-display driving chip; 142-a photosensitive processing chip;
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The integrity of the display screen can be guaranteed and the display effect can be improved by shooting under the screen, so that the technology becomes the mainstream shooting technology of terminal products such as mobile phones and the like at present. However, current under-screen photography also has significant drawbacks, for example, see fig. 1: camera module 101 sets up under display screen 102, and display screen 102 divide into light transmission area 1021 and non-light transmission area 1022, and wherein the position of light transmission area 1021 corresponds with camera module 101's position, like this, can see through this light transmission area 1021 when camera module 101 needs carry out image acquisition and gather the outside light of penetrating into in the screen to convert light signal into the signal of telecommunication, convert the signal of telecommunication into digital signal again, realize image acquisition.
Limited by the current camera technology, the camera module 101 is usually large in size and thickness, which may cause the size and thickness of the terminal to be unable to be reduced to the state expected by the user, and hinder the development trend of terminal products to be light, thin and portable.
Based on this, the present invention intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.
An alternative embodiment of the invention:
the present embodiment provides a display screen, please refer to a schematic cross-sectional structure diagram of the display screen shown in fig. 2: the display screen 20 includes a carrier substrate 21, a filter setting substrate 22, a display layer 23, a photosensitive layer 24, and a filter layer 25.
The display layer 23 includes a plurality of LED pixel units 230, each LED pixel unit 230 may include one or more LED chips capable of converting an electrical signal into an optical signal, and for a color display screen, the LED pixel units 230 should include at least LED chips of three primary colors of RGB, in other examples of this embodiment, the LED pixel units 230 may include LED chips capable of emitting other colors of light besides the LED chips of three colors of red, green, and blue, for example, an LED chip capable of emitting indigo blue light, an LED chip capable of emitting yellow light, and the like. The LED pixel unit 230 is disposed on the carrier substrate 21, and is electrically connected to a display driving circuit (not shown in fig. 2) on the carrier substrate 21, and can operate under the driving of the display driving circuit. The display screen 20 can realize display by different control of the LED pixel units 230 in the whole display screen 20. It should be noted that the display driving circuit is disposed on the carrier substrate 21, and the word "up" does not mean that the display driving circuit is necessarily located on the surface of the carrier substrate 21, nor that the display driving circuit is located on the upper portion of the carrier substrate 21. The display driving circuit may be considered to be disposed on the carrier substrate 21 as long as the display driving circuit is in contact with the carrier substrate 21, so in some examples, the display driving circuit may be disposed on a surface of the carrier substrate 21, and in other examples, the display driving circuit may be disposed inside the carrier substrate 21.
The filter layer 25 includes a plurality of filter units 250 disposed on the filter-disposing substrate 22, and the filter units 250 can allow some light to pass through them and block other light from one side to another layer, in short, the filter units 250 are optical devices that can be used to select a desired radiation band. In this embodiment, the filter layer 25 includes a filter unit group formed by a plurality of filter units 250 with different colors, for example, please refer to a schematic structural diagram of a filter unit group shown in fig. 3: the filter unit group may include a red filter unit 2501 transmitting only red light, a blue filter unit 2502 transmitting only blue light, and a green filter unit 2503 transmitting only green light. In some examples of the present embodiment, the ratios of the red, green, and blue color filter elements in one filter element group are substantially the same, but in other examples of the present embodiment, the ratios of the red and blue color filter elements in one filter element group are each 25%, and the ratio of the green color filter element in another filter element group is 50%, thereby forming an RGBG filter element group, which is a primary color filter, also referred to as a bayer filter. It is understood that the ratio of the color filter units in the filter unit group may also be other values, and will not be described herein. In some other examples of this embodiment, the filter unit group may include filter units of other colors besides the filter units of three colors of red, green and blue, and the filter units of other colors may be arranged to implement complementary colors, so that the filter unit group including the filter units of colors other than red, green and blue is actually a complementary color filter. For example, in an example of the present embodiment, a yellow filter unit is further included in the filter unit group, and the red, green, blue, and yellow four-color filter units each account for 25%, thereby forming an RGBY filter unit group. In general, the filter units in filter layer 25 are directly arranged in the form of filter unit groups, i.e., filter units belonging to the same filter unit group are arranged adjacent to each other. In some examples, the filter unit 250 also needs to be driven by a current to operate, for example, the filter unit 250 is an electrochromic filter element or a liquid crystal filter element. In these examples, a filter driving circuit for driving the filter unit 250 may be provided on the filter setting substrate 22.
The photosensitive layer 24 includes a plurality of photosensitive units 240 disposed on the carrier substrate 21, and the photosensitive units 240 can be used to convert optical signals into electrical signals. The photosensitive unit 240 is electrically connected to a photosensitive input circuit (not shown in fig. 2) on the carrier substrate 21 to transmit its photoelectric conversion result to the photosensitive processing chip through the photosensitive input circuit. Similarly, the photosensitive input circuit may be disposed on the surface of the carrier substrate 21, or may be disposed inside the carrier substrate 21.
In the present embodiment, the light incident surface of the light sensing unit 240 and the light emitting surface of the LED pixel unit 230 face the same direction, so that the light sensing unit 240 senses the light signal in which direction the display layer 23 faces to display the image. Meanwhile, the light incident surface of the light sensing unit 240 faces the filtering unit 250, and the position of the light sensing unit 240 in the light sensing layer 24 corresponds to the position of the filtering unit 250 in the filtering layer 25, so that the light incident surface of the light sensing unit 240 is opposite to the light emitting surface of the filtering unit 250, and thus, the light passing through the filtering unit 250 can be sensed by the light sensing unit 240 to generate an electrical signal. Meanwhile, since the light sensing unit 240 is disposed in the space between the adjacent LED pixel units 230, the light sensing unit 240 and the filtering unit 250 do not affect the light emitted from the LED pixel units 230, and the display effect of the display layer 23 is not affected.
Since the filter layer 25 is located on the light incident surface of the photosensitive layer 24, the filter layer 25 is also located on the light emitting surface of the display layer 23, in this case, the filter setting substrate 22 for carrying the filter layer 25 is also necessarily located on the light emitting surface of the display layer 23, in order to avoid the filter setting substrate 22 from affecting the display of the display layer 23, in this embodiment, the filter setting substrate 22 is transparent, for example, the filter setting substrate 22 may be a glass substrate. In some examples of the present embodiment, the filter setting substrate 22 may also be a sapphire substrate or the like.
It is understood that although the filter setting substrate 22 is closer to the photosensitive layer 24 than the filter layer 25 in fig. 2, that is, the filter setting substrate 22 is disposed between the filter unit 250 and the photosensitive unit 240, in some other examples of the embodiment, the filter setting substrate 22 may be located on a side of the filter layer 25 away from the photosensitive layer 24. In the orientation in which the photosensitive layer 24 is located below and the filter layer 25 is located above, the filter setting substrate 22 may be provided below the filter layer 25, or the filter setting substrate 22 may be provided above the filter layer 25.
It is understood that although the carrier substrate 21 in the display panel 20 shown in fig. 2 is only composed of one substrate, the display driving circuit and the photosensitive input circuit are disposed on the same substrate, so that the LED pixel units 230 and the photosensitive units 240 are also disposed on the same carrier substrate 21, and the display layer 23 and the photosensitive layer 24 are at the same level. However, in some other examples of this embodiment, the supporting substrate 21 in the display panel may also include two or more substrates, and the photosensitive layer 24 and the display layer 23 are located on different substrates. For example, in an example of the present embodiment, please refer to a display screen 40 shown in fig. 4: the carrier substrate 21 includes a display carrier substrate 211 and a photosensitive carrier substrate 212, wherein the display driving circuit is disposed on the display carrier substrate 211, and thus the display layer 23 is disposed on the display carrier substrate 211, and the photosensitive input circuit is disposed on the photosensitive carrier substrate 212, and thus the photosensitive layer is disposed on the photosensitive carrier substrate 212.
In fig. 4, the photosensitive carrier substrate 212 is located between the display carrier substrate 211 and the filtering setting substrate 22, so that the photosensitive carrier substrate 212 is transparent to prevent the photosensitive carrier substrate 212 from blocking the light of the LED pixel unit 230. Although in fig. 4, the photosensitive carrier substrate 212 is located on a side of the photosensitive layer 24 close to the filter layer 25, and the photosensitive carrier substrate 212 is disposed on the photosensitive layer 24, in other examples of the embodiment, the photosensitive carrier substrate 212 may also be disposed below the photosensitive layer 24. In fig. 4, the display layer 23 and the photosensitive layer 24 may be in the same horizontal plane, even if the display layer 23 and the photosensitive layer 24 are flush, but in other examples of the embodiment, the photosensitive layer 24 and the display layer 23 may be in different horizontal planes, for example, the photosensitive layer 24 may be higher than the display layer 23. For example, in one example, when the photosensitive carrier substrate 212 is located between the photosensitive unit 240 and the display layer 23, the photosensitive layer 24 is necessarily higher than the display layer 23; in still other examples, the photosensitive layer 24 may be disposed higher than the display layer 23 even though the photosensitive unit 240 is located between the photosensitive carrier substrate 212 and the display carrier substrate 211.
As can be seen from the foregoing description, the filter layer 25 includes a filter unit 250 corresponding to the position of the light sensing unit 240 in the light sensing layer 24, and in some examples of the embodiment, the filter layer 25 further includes a transparent adhesive layer 251 corresponding to the position of the LED pixel unit 230 in the display layer 23, please continue to refer to fig. 2. In some examples, the display layer 23 and the photosensitive layer 24 are located at the same level, and the LED pixel units 230 and the photosensitive units 240 corresponding to the same filtering unit group (hereinafter, the photosensitive units 240 corresponding to the same filtering unit group are referred to as "photosensitive unit group") are alternately disposed on the carrier substrate 21, and correspondingly, the transparent glue layer 251 and the filtering units 250 are also alternately disposed on the filtering substrate 22. Of course, in some other examples of this embodiment, the position of the filter layer 25 corresponding to the LED pixel unit 230 may also be directly hollowed out, and no device is disposed.
It will be appreciated that in some display screens, only a partial area may be used for image capture, and in these examples, the photosensitive layer 24 and the filter layer 25 will be distributed only in a partial area of the display screen, for example, as shown in fig. 5, the display screen 20 includes a first area 201 and a second area 202. Wherein the first area 201 is an image capture area, and the second area 202 is a non-image capture area, in this example, the light sensing unit 240 and the filter unit 250 are only distributed in the first area 201, but not distributed in the second area 202. In these examples, in the second region 202, a light blocking unit may be disposed in a space between two adjacent LED pixel units 230, for example, please further combine the schematic structural diagram of a display screen 60 shown in fig. 6: in the first region 201 of the display screen 60, the light sensing units 240 and the LED pixel units 230 are disposed on the carrier substrate 21, the light sensing units 240 are disposed in the gaps between the LED pixel units 230, and the light sensing unit groups and the LED pixel units 230 are alternately disposed. In the second region 202, the distribution density of the LED pixel units 230 is the same as that of the LED pixel units 230 in the first region 201, but the light sensing units 240 are not included in the second region 202, and the light blocking units 260 are disposed in the gaps between the LED pixel units 230 instead of the light sensing unit groups. Meanwhile, in the first region 201, the distribution density of the filter unit 250 is the same as that of the photosensitive unit 240, but the filter unit 250 is also not disposed in the second region 202, and in some examples of the present embodiment, the transparent adhesive layer 251 may be disposed in the second region 202 of the filter setting substrate 22.
The light blocking unit 260 has a light blocking function, and may be made of a light-tight material such as black glue, and the light blocking unit 260 is disposed in the gap between the adjacent LED pixel units 230, so as to prevent the adjacent LED pixel units 230 from cross-talk with each other and affecting the display effect of the display screen.
It is needless to say that in the display screens provided in other examples of the present embodiment, the light sensing units 240 and the filtering units 250 may be uniformly distributed in all the areas, and the image pickup area and the non-image pickup area are not distinguished in these display screens.
In some examples of this embodiment, please refer to fig. 7: the display screen 70 includes a first wall 271, and the first wall 271 can be disposed on the carrier substrate 21, which can be located on the same side of the carrier substrate 21 as the LED pixel unit 230. The first retaining wall 271 is disposed along the edge of the carrier substrate 21 to enclose the display layer 23 and the photosensitive layer 24 therebetween, so that external light can be prevented from being incident into the LED pixel units 230 and the photosensitive unit 240 from the side of the display screen 70, and the display effect of the display layer 23 and the image capturing effect of the photosensitive layer 24 can be affected.
It is understood that if the carrier substrate 21 is divided into the display carrier substrate 211 and the photosensitive carrier substrate 212, and the display layer 23 and the photosensitive layer 24 are respectively disposed on different substrates, in this case, the first retaining walls 271 may be respectively disposed on both the display carrier substrate 211 and the photosensitive carrier substrate 212: the first retaining wall 271 disposed on the display carrier substrate 211 is disposed along the edge of the display carrier substrate 211, and is used for enclosing the display layer 23 and preventing light from entering the LED pixel unit 230 from the side of the display screen; the first retaining wall 271 disposed on the photosensitive carrier substrate 212 is disposed along the edge of the photosensitive carrier substrate 212 for enclosing the photosensitive layer 24, so as to prevent light from entering the photosensitive unit 240 from the side of the display panel.
In some examples of this embodiment, please continue to refer to fig. 7, a second retaining wall 272 is further disposed in the display screen 70, the second retaining wall 272 may be disposed along an edge of the filter disposition substrate 22 to enclose the filter layer 25 in the middle, and when the filter layer 25 only includes the filter unit 250, the second retaining wall 272 encloses the filter unit 250 in the middle; when the filter layer 25 further includes the transparent adhesive layer 251, the second retaining wall 272 encloses the filter unit 250 and the transparent adhesive layer 251 together in the middle, so as to prevent external light from entering the filter unit 250 from the side of the display screen 70, and further, the external light is transmitted through the filter unit 250 to the photosensitive unit 240 to affect the image capturing effect.
It is understood that although the first retaining wall 271 and the second retaining wall 272 are provided in the display screen shown in fig. 7, in some other examples of the present embodiment, only one of the two may be provided.
In some examples of the present embodiment, in order to prevent light entering filter layer 25 from escaping to the outside of the display screen, a one-way anti-reflection film 2504 is further disposed in the display screen, and as shown in fig. 8, the one-way anti-reflection film 2504 is disposed on a side of filter unit 250 away from light-sensing unit 240, that is, on the light incident surface of filter unit 250. It is understood that the one-way antireflection film 2504 should not cover the LED pixel unit 230, and therefore, when the one-way antireflection film 2504 is disposed, a complete one-way antireflection film layer may be patterned to cut out the position corresponding to the LED pixel unit 230, and then the patterned film layer is disposed on the light incident surface of the filter layer 25. In some examples, the anti-reflection film 2504 is directly disposed in the filter unit 250, for example, during the process of preparing the filter unit 250, an anti-reflection glue may be directly coated on the filter unit group to form the anti-reflection film 2504.
In some examples of this embodiment, the display screen further includes a display driving chip, and the display driving chip is electrically connected to the display driving circuit, and is configured to receive a control signal from the main control chip, and control the LED pixel unit 230 to operate through the display driving circuit according to the control signal, so that the display layer 23 displays an image.
In some examples, the display screen includes a photosensitive processing chip, and the photosensitive processing chip is electrically connected to the photosensitive unit 240 through a photosensitive input circuit, so that after the photosensitive unit 240 senses light and converts the light signal into an electrical signal, the photosensitive processing chip can receive the photoelectric conversion result of the photosensitive unit 240, and then convert the electrical signal transmitted by the photosensitive unit 240 into a digital signal.
In some examples, the display screen may include both the display driving chip and the photosensitive processing chip. Of course, in some examples, the display screen itself may not include the display driving chip or the photosensitive processing chip, and when such a display screen is applied to a terminal, it is necessary to additionally provide the display driving chip to be electrically connected to the display driving circuit, or to additionally provide the photosensitive processing chip to be electrically connected to the photosensitive input circuit.
The present embodiment also provides a terminal, which may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like. Referring to fig. 9, the terminal 9 includes a main control chip 91 and a display screen 92, the display screen 92 may be the display screen provided in any one of the foregoing examples, and the main control chip 91 is connected to a display driving circuit 921 and a photosensitive input circuit 922 in the display screen 92, it can be understood that the main control chip 91 may be connected to the display driving circuit 921 and the photosensitive input circuit 922 through the display driving chip 931 and the photosensitive processing chip 932, respectively. The main control chip 91 can control the LED pixel unit 230 to display through the display driving chip 931 and the display driving circuit 921, and can obtain the image capturing result of the photosensitive unit 240 through the photosensitive input circuit 922 and the photosensitive processing chip 932.
It should be understood that, although fig. 9 shows the display screen 92 including the display driving chip 931 and the photosensitive processing chip 932, in some other examples, the display screen 92 itself may not include the display driving chip 931 and/or the photosensitive processing chip 932.
It is understood that the terminal 9 may further include components such as an RF (Radio Frequency) unit, a WiFi module, an audio output unit, a sensor, a user input unit, an interface unit, and a memory, besides the main control chip 91 and the display screen 92.
The display screen that this embodiment provided not only possesses the display function, has integrateed the image acquisition function moreover, so, the terminal of using this kind of display screen need not set up the camera module in addition again, not only can reduce terminal cost, can reduce the thickness and the volume at terminal moreover, promotes the portability at terminal, strengthens the product competitiveness at terminal.
Another alternative embodiment of the invention:
in order to make the structural details and advantages of the foregoing display screen and terminal more clear to those skilled in the art, the present embodiment will be described with reference to the following example, please refer to fig. 10:
the display panel 100 includes a carrier substrate 111 and a filter setting substrate 112, which are disposed opposite to each other, and since the carrier substrate 111 is located below and the filter setting substrate 112 is located above, the carrier substrate 111 and the filter setting substrate 112 may also be referred to as "lower substrate" and "upper substrate", respectively. In this embodiment, the carrier substrate 111 and the filter setting substrate 112 are each composed of a single substrate, and both of them may be transparent substrates, for example, in some examples of this embodiment, the carrier substrate 111 and the filter setting substrate 112 are glass substrates, and in other examples of this embodiment, the carrier substrate 111 and the filter setting substrate 112 may also be sapphire substrates.
A plurality of LED pixel units 121 and a plurality of photosensitive units 122 are arranged on the bearing substrate 111, a plurality of filter units 123 and a plurality of transparent layers 124 on the same horizontal plane are arranged on the filter arrangement substrate 112, the photosensitive units 122 are arranged in gaps among the LED pixel units 121, the number and the area of the filter units 123 on the horizontal plane are the same as those of the photosensitive units 122, and meanwhile, the positions of the filter units 123 are opposite to those of the photosensitive units 122; and the transparent layer 124 has the same area in the horizontal plane as that of the LED pixel unit 121, and is located opposite to the LED pixel unit 121.
In this embodiment, the LED pixel unit 121 at least includes a red LED chip, a green LED chip, and a blue LED chip. The LED chip in the present embodiment includes, but is not limited to, Micro-LED (Micro LED), mini-LED (mini LED), or OLED (Organic Light-Emitting Diode).
The light sensing unit 122 may include, but is not limited to, at least one of a CCD (charge coupled device) element and a CMOS (complementary metal oxide conductor) device, which may convert an optical signal transmitted from the light filtering unit 123 into an electrical signal.
The filter unit 123 includes a one-way anti-reflection film 1230 arranged on the light incident surface of the filter unit and arranged on the light incident surface of the filter unit 123, and the one-way anti-reflection film 1230 can prevent the light rays of the filter unit 123 close to the light sensing unit 122 from escaping to the opposite side. After the one-way antireflection film 1230 is provided, the color of the filter unit 123 may not be displayed.
In this embodiment, the display panel 100 further includes a first retaining wall 131 and a second retaining wall 132, wherein the first retaining wall 131 is disposed on the carrier substrate 111 and is located at the same side as the LED pixel units 121 and the photosensitive units 122, and the first retaining wall 131 is disposed on the carrier substrate 111 along an edge and is attached to the LED pixel units 121 and/or the photosensitive units 122 located at the edge. In addition, the height of the first retaining wall 131 is substantially the same as the height of the LED pixel unit 121 and the height of the light sensing unit 122, or slightly greater than the height of the LED pixel unit 121 and the height of the light sensing unit 122, so that it can be ensured that no light is emitted into the LED pixel unit 121 or the light sensing unit 122 from the side of the display screen 100, which is beneficial to ensuring the display effect and the image capturing effect of the display screen 100.
The second retaining wall 132 is disposed on the filtering-setting substrate 112 and located at the same side as the transparent layer 124 and the filtering unit 123, and the second retaining wall 132 is disposed along an edge of the filtering-setting substrate 112 and attached to the transparent layer 124 and/or the filtering unit 123 located at the edge. In addition, the height of the second blocking wall 132 is substantially the same as the height of the filtering unit 123 and the transparent layer 124, or slightly greater than the height of the filtering unit 123 and the transparent layer 124, so that no light is incident into the transparent layer 124 or the filtering unit 123 from the side of the display screen 100, and the influence on the display effect of the LED pixel unit 121 and the interference on the image pickup effect of the photosensitive unit 122 are avoided.
Referring to fig. 11, the display panel 100 of the present embodiment further includes a display driving chip 141 and a photosensitive processing chip 142, wherein the display driving chip 141 is electrically connected to the LED pixel unit 121 through a display driving circuit, and the photosensitive processing chip 142 is electrically connected to the photosensitive unit 122 through a photosensitive input circuit. In this embodiment, the display driving circuit may be disposed in the gap between the adjacent LED pixel units 121 on the carrier substrate 111, and the photosensitive input circuit may be disposed in the gap between the adjacent photosensitive units 122 on the carrier substrate 111. It should be noted that, in fig. 11, the circuit for driving each LED chip by the display driving chip 141 is not shown, and the photosensitive input circuit between each photosensitive unit 122 and the photosensitive processing chip 142 is not shown, which only illustrates the connection between a part of LED chips and the display driving chip 141 and a part of photosensitive units 122 and the photosensitive processing chip 142.
In some examples, when the display screen 100 is applied to a terminal (e.g., a mobile phone, a tablet computer, a wearable device) including a main control chip, the display driving chip 141 and the photosensitive processing chip 142 may cooperate under the control of the main control chip. Alternatively, the display driving Chip 141 and the photosensitive processing Chip 142 may be disposed On COFs (Chip On Flex, or, Chip On Film), and may be located On different COFs.
It should be understood that, in a prepared display screen, the position of each photosensitive unit 122 on the display screen and the corresponding filter unit 123 of the photosensitive unit 122 are determined, so that after acquiring the voltage amplitude of the electrical signal transmitted by one photosensitive unit 122, the photosensitive processing chip 142 can determine the brightness of the color corresponding to the photosensitive unit 122, and the photosensitive processing chip 142 can determine the pixel value at a pixel point of an image by integrating the colors and the brightness corresponding to a plurality of filter units 123. In some examples of the present embodiment, the photosensitive processing chip 142 may obtain the voltage values of the photosensitive units 122 one by one from left to right and from top to bottom according to the arrangement positions of the photosensitive units 122 on the display screen 100. For example, referring to fig. 12, a schematic diagram of a photosensitive processing chip 142 for obtaining voltage values of the photosensitive cells 122 is shown, wherein XnYn represents a photosensitive cell with coordinates (Xn, Yn), the abscissa represents the time for obtaining the voltage values of the photosensitive cells 122, and the ordinate represents the voltage values of the corresponding photosensitive cells 122. In still other examples, the photosensitive processing chip 142 may divide the display screen 100 into a plurality of regions, and then obtain the voltage values of the photosensitive units 122 in each region in a certain order. The acquisition of the corresponding voltage values of the light sensing units 122 in different areas can be performed simultaneously.
The embodiment further provides a terminal, where the terminal includes a main control chip and the display screen 100, and the display screen 100 is in communication connection with the main control chip, where the main control chip may be a processor of the terminal.
The display screen that this embodiment provided has utilized the sensitization principle of CCD camera, has realized image acquisition, will show function and function integration of making a video recording, has reduced the thickness at terminal, moreover because terminal equipment firm does not need additionally to purchase the camera module, has also practiced thrift the terminal cost.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A display screen, comprising:
a carrier substrate;
a transparent filter arrangement substrate;
a display layer comprising a plurality of LED pixel cells configured to convert an electrical signal to an optical signal;
a photosensitive layer including a plurality of photosensitive cells configured to convert an optical signal into an electrical signal; and
a filter layer including a plurality of filter units;
the light filtering unit is arranged on the light filtering setting substrate, and the LED pixel unit and the photosensitive unit are both arranged on the bearing substrate and are respectively and electrically connected with the display driving circuit and the photosensitive input circuit on the bearing substrate; the light incident surface of the light sensing unit and the light emergent surface of the LED pixel unit face the same direction, and the light incident surface of the light sensing unit faces the light filtering unit; the photosensitive units are positioned in the space between the adjacent LED pixel units, and the positions of the photosensitive units correspond to the light filtering units.
2. The display screen of claim 1, further comprising a display driving chip and a photosensitive processing chip, wherein the display driving chip is configured to receive a control signal from a main control chip and control the LED pixel unit to operate through the display driving circuit according to the control signal; the photosensitive processing chip is configured to receive the electrical signal converted by the photosensitive unit through the photosensitive input circuit and convert the electrical signal into image data.
3. The display screen of claim 1, further comprising a one-way anti-reflection film disposed on a side of the filter unit away from the light sensing unit.
4. A display screen in accordance with claim 1, wherein the display layer is at the same level as the photosensitive layer.
5. The display screen of claim 4, further comprising a first retaining wall disposed along an edge of the carrier substrate and enclosing the display layer and the photosensitive layer therebetween.
6. A display screen in accordance with any one of claims 1-5, wherein the filter layer further comprises a layer of transparent glue positioned opposite the LED pixel cells in the display layer.
7. The display screen of claim 6, further comprising a second dam disposed along an edge of the filter placement substrate and enclosing the filter layer in the middle.
8. A display screen according to any one of claims 1 to 5, wherein the display screen comprises a first area and a second area, and the light-sensing units and the light-filtering units are distributed only in the first area; and in the second area, a light blocking unit is arranged in a space between the adjacent LED pixel units.
9. A display screen according to any one of claims 1 to 5, characterised in that the light-sensitive cells are evenly distributed over the full area of the display screen.
10. A terminal, comprising a main control chip and a display screen according to any one of claims 1 to 9, wherein the main control chip is configured to be communicatively connected to the LED pixel units through a display driving chip and the display driving circuit to control the LED pixel units to display, and is configured to be communicatively connected to the photosensitive units through a photosensitive processing chip and the photosensitive input circuit to obtain image capturing results of the photosensitive units.
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| CN202110817971.5A CN114038343A (en) | 2021-07-20 | 2021-07-20 | Display screen and terminal |
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| CN202110817971.5A CN114038343A (en) | 2021-07-20 | 2021-07-20 | Display screen and terminal |
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